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3d7d978c21
weston/libweston/compositor.c
Marius Vlad 3d7d978c21 libweston: Rename weston_debug_compositor to weston_log_context 
As we transition towards a more generic API for weston loggging
framework rename weston_debug_compositor to weston_log_context to show
the fact that this is not really debug but a logging context.

Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
2019-05-10 12:02:00 +00:00

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/*
* Copyright © 2010-2011 Intel Corporation
* Copyright © 2008-2011 Kristian Høgsberg
* Copyright © 2012-2018 Collabora, Ltd.
* Copyright © 2017, 2018 General Electric Company
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "config.h"
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <limits.h>
#include <stdarg.h>
#include <assert.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <sys/utsname.h>
#include <sys/stat.h>
#include <unistd.h>
#include <math.h>
#include <linux/input.h>
#include <dlfcn.h>
#include <signal.h>
#include <setjmp.h>
#include <sys/time.h>
#include <time.h>
#include <errno.h>
#include <inttypes.h>
#include "timeline.h"
#include <libweston/libweston.h>
#include "weston-debug.h"
#include "linux-dmabuf.h"
#include "viewporter-server-protocol.h"
#include "presentation-time-server-protocol.h"
#include "linux-explicit-synchronization-unstable-v1-server-protocol.h"
#include "linux-explicit-synchronization.h"
#include "shared/fd-util.h"
#include "shared/helpers.h"
#include "shared/os-compatibility.h"
#include "shared/string-helpers.h"
#include "shared/timespec-util.h"
#include "git-version.h"
#include <libweston/version.h>
#include <libweston/plugin-registry.h>
#include "pixel-formats.h"
#define DEFAULT_REPAINT_WINDOW 7 /* milliseconds */
static void
weston_output_update_matrix(struct weston_output *output);
static void
weston_output_transform_scale_init(struct weston_output *output,
uint32_t transform, uint32_t scale);
static void
weston_compositor_build_view_list(struct weston_compositor *compositor);
static char *
weston_output_create_heads_string(struct weston_output *output);
/** Send wl_output events for mode and scale changes
*
* \param head Send on all resources bound to this head.
* \param mode_changed If true, send the current mode.
* \param scale_changed If true, send the current scale.
*/
static void
weston_mode_switch_send_events(struct weston_head *head,
bool mode_changed, bool scale_changed)
{
struct weston_output *output = head->output;
struct wl_resource *resource;
int version;
wl_resource_for_each(resource, &head->resource_list) {
if (mode_changed) {
wl_output_send_mode(resource,
output->current_mode->flags,
output->current_mode->width,
output->current_mode->height,
output->current_mode->refresh);
}
version = wl_resource_get_version(resource);
if (version >= WL_OUTPUT_SCALE_SINCE_VERSION && scale_changed)
wl_output_send_scale(resource, output->current_scale);
if (version >= WL_OUTPUT_DONE_SINCE_VERSION)
wl_output_send_done(resource);
}
}
static void
weston_mode_switch_finish(struct weston_output *output,
int mode_changed, int scale_changed)
{
struct weston_seat *seat;
struct weston_head *head;
pixman_region32_t old_output_region;
pixman_region32_init(&old_output_region);
pixman_region32_copy(&old_output_region, &output->region);
/* Update output region and transformation matrix */
weston_output_transform_scale_init(output, output->transform, output->current_scale);
pixman_region32_init(&output->previous_damage);
pixman_region32_init_rect(&output->region, output->x, output->y,
output->width, output->height);
weston_output_update_matrix(output);
/* If a pointer falls outside the outputs new geometry, move it to its
* lower-right corner */
wl_list_for_each(seat, &output->compositor->seat_list, link) {
struct weston_pointer *pointer = weston_seat_get_pointer(seat);
int32_t x, y;
if (!pointer)
continue;
x = wl_fixed_to_int(pointer->x);
y = wl_fixed_to_int(pointer->y);
if (!pixman_region32_contains_point(&old_output_region,
x, y, NULL) ||
pixman_region32_contains_point(&output->region,
x, y, NULL))
continue;
if (x >= output->x + output->width)
x = output->x + output->width - 1;
if (y >= output->y + output->height)
y = output->y + output->height - 1;
pointer->x = wl_fixed_from_int(x);
pointer->y = wl_fixed_from_int(y);
}
pixman_region32_fini(&old_output_region);
if (!mode_changed && !scale_changed)
return;
/* notify clients of the changes */
wl_list_for_each(head, &output->head_list, output_link)
weston_mode_switch_send_events(head,
mode_changed, scale_changed);
}
static void
weston_compositor_reflow_outputs(struct weston_compositor *compositor,
struct weston_output *resized_output, int delta_width);
WL_EXPORT int
weston_output_mode_set_native(struct weston_output *output,
struct weston_mode *mode,
int32_t scale)
{
int ret;
int mode_changed = 0, scale_changed = 0;
int32_t old_width;
if (!output->switch_mode)
return -1;
if (!output->original_mode) {
mode_changed = 1;
ret = output->switch_mode(output, mode);
if (ret < 0)
return ret;
if (output->current_scale != scale) {
scale_changed = 1;
output->current_scale = scale;
}
}
old_width = output->width;
output->native_mode = mode;
output->native_scale = scale;
weston_mode_switch_finish(output, mode_changed, scale_changed);
if (mode_changed || scale_changed) {
weston_compositor_reflow_outputs(output->compositor, output, output->width - old_width);
wl_signal_emit(&output->compositor->output_resized_signal, output);
}
return 0;
}
WL_EXPORT int
weston_output_mode_switch_to_native(struct weston_output *output)
{
int ret;
int mode_changed = 0, scale_changed = 0;
if (!output->switch_mode)
return -1;
if (!output->original_mode) {
weston_log("already in the native mode\n");
return -1;
}
/* the non fullscreen clients haven't seen a mode set since we
* switched into a temporary, so we need to notify them if the
* mode at that time is different from the native mode now.
*/
mode_changed = (output->original_mode != output->native_mode);
scale_changed = (output->original_scale != output->native_scale);
ret = output->switch_mode(output, output->native_mode);
if (ret < 0)
return ret;
output->current_scale = output->native_scale;
output->original_mode = NULL;
output->original_scale = 0;
weston_mode_switch_finish(output, mode_changed, scale_changed);
return 0;
}
WL_EXPORT int
weston_output_mode_switch_to_temporary(struct weston_output *output,
struct weston_mode *mode,
int32_t scale)
{
int ret;
if (!output->switch_mode)
return -1;
/* original_mode is the last mode non full screen clients have seen,
* so we shouldn't change it if we already have one set.
*/
if (!output->original_mode) {
output->original_mode = output->native_mode;
output->original_scale = output->native_scale;
}
ret = output->switch_mode(output, mode);
if (ret < 0)
return ret;
output->current_scale = scale;
weston_mode_switch_finish(output, 0, 0);
return 0;
}
static void
region_init_infinite(pixman_region32_t *region)
{
pixman_region32_init_rect(region, INT32_MIN, INT32_MIN,
UINT32_MAX, UINT32_MAX);
}
static struct weston_subsurface *
weston_surface_to_subsurface(struct weston_surface *surface);
WL_EXPORT struct weston_view *
weston_view_create(struct weston_surface *surface)
{
struct weston_view *view;
view = zalloc(sizeof *view);
if (view == NULL)
return NULL;
view->surface = surface;
view->plane = &surface->compositor->primary_plane;
/* Assign to surface */
wl_list_insert(&surface->views, &view->surface_link);
wl_signal_init(&view->destroy_signal);
wl_list_init(&view->link);
wl_list_init(&view->layer_link.link);
pixman_region32_init(&view->clip);
view->alpha = 1.0;
pixman_region32_init(&view->transform.opaque);
wl_list_init(&view->geometry.transformation_list);
wl_list_insert(&view->geometry.transformation_list,
&view->transform.position.link);
weston_matrix_init(&view->transform.position.matrix);
wl_list_init(&view->geometry.child_list);
pixman_region32_init(&view->geometry.scissor);
pixman_region32_init(&view->transform.boundingbox);
view->transform.dirty = 1;
return view;
}
struct weston_frame_callback {
struct wl_resource *resource;
struct wl_list link;
};
struct weston_presentation_feedback {
struct wl_resource *resource;
/* XXX: could use just wl_resource_get_link() instead */
struct wl_list link;
/* The per-surface feedback flags */
uint32_t psf_flags;
};
static void
weston_presentation_feedback_discard(
struct weston_presentation_feedback *feedback)
{
wp_presentation_feedback_send_discarded(feedback->resource);
wl_resource_destroy(feedback->resource);
}
static void
weston_presentation_feedback_discard_list(struct wl_list *list)
{
struct weston_presentation_feedback *feedback, *tmp;
wl_list_for_each_safe(feedback, tmp, list, link)
weston_presentation_feedback_discard(feedback);
}
static void
weston_presentation_feedback_present(
struct weston_presentation_feedback *feedback,
struct weston_output *output,
uint32_t refresh_nsec,
const struct timespec *ts,
uint64_t seq,
uint32_t flags)
{
struct wl_client *client = wl_resource_get_client(feedback->resource);
struct weston_head *head;
struct wl_resource *o;
uint32_t tv_sec_hi;
uint32_t tv_sec_lo;
uint32_t tv_nsec;
bool done = false;
wl_list_for_each(head, &output->head_list, output_link) {
wl_resource_for_each(o, &head->resource_list) {
if (wl_resource_get_client(o) != client)
continue;
wp_presentation_feedback_send_sync_output(feedback->resource, o);
done = true;
}
/* For clone mode, send it for just one wl_output global,
* they are all equivalent anyway.
*/
if (done)
break;
}
timespec_to_proto(ts, &tv_sec_hi, &tv_sec_lo, &tv_nsec);
wp_presentation_feedback_send_presented(feedback->resource,
tv_sec_hi, tv_sec_lo, tv_nsec,
refresh_nsec,
seq >> 32, seq & 0xffffffff,
flags | feedback->psf_flags);
wl_resource_destroy(feedback->resource);
}
static void
weston_presentation_feedback_present_list(struct wl_list *list,
struct weston_output *output,
uint32_t refresh_nsec,
const struct timespec *ts,
uint64_t seq,
uint32_t flags)
{
struct weston_presentation_feedback *feedback, *tmp;
assert(!(flags & WP_PRESENTATION_FEEDBACK_INVALID) ||
wl_list_empty(list));
wl_list_for_each_safe(feedback, tmp, list, link)
weston_presentation_feedback_present(feedback, output,
refresh_nsec, ts, seq,
flags);
}
static void
surface_state_handle_buffer_destroy(struct wl_listener *listener, void *data)
{
struct weston_surface_state *state =
container_of(listener, struct weston_surface_state,
buffer_destroy_listener);
state->buffer = NULL;
}
static void
weston_surface_state_init(struct weston_surface_state *state)
{
state->newly_attached = 0;
state->buffer = NULL;
state->buffer_destroy_listener.notify =
surface_state_handle_buffer_destroy;
state->sx = 0;
state->sy = 0;
pixman_region32_init(&state->damage_surface);
pixman_region32_init(&state->damage_buffer);
pixman_region32_init(&state->opaque);
region_init_infinite(&state->input);
wl_list_init(&state->frame_callback_list);
wl_list_init(&state->feedback_list);
state->buffer_viewport.buffer.transform = WL_OUTPUT_TRANSFORM_NORMAL;
state->buffer_viewport.buffer.scale = 1;
state->buffer_viewport.buffer.src_width = wl_fixed_from_int(-1);
state->buffer_viewport.surface.width = -1;
state->buffer_viewport.changed = 0;
state->acquire_fence_fd = -1;
}
static void
weston_surface_state_fini(struct weston_surface_state *state)
{
struct weston_frame_callback *cb, *next;
wl_list_for_each_safe(cb, next,
&state->frame_callback_list, link)
wl_resource_destroy(cb->resource);
weston_presentation_feedback_discard_list(&state->feedback_list);
pixman_region32_fini(&state->input);
pixman_region32_fini(&state->opaque);
pixman_region32_fini(&state->damage_surface);
pixman_region32_fini(&state->damage_buffer);
if (state->buffer)
wl_list_remove(&state->buffer_destroy_listener.link);
state->buffer = NULL;
fd_clear(&state->acquire_fence_fd);
weston_buffer_release_reference(&state->buffer_release_ref, NULL);
}
static void
weston_surface_state_set_buffer(struct weston_surface_state *state,
struct weston_buffer *buffer)
{
if (state->buffer == buffer)
return;
if (state->buffer)
wl_list_remove(&state->buffer_destroy_listener.link);
state->buffer = buffer;
if (state->buffer)
wl_signal_add(&state->buffer->destroy_signal,
&state->buffer_destroy_listener);
}
WL_EXPORT struct weston_surface *
weston_surface_create(struct weston_compositor *compositor)
{
struct weston_surface *surface;
surface = zalloc(sizeof *surface);
if (surface == NULL)
return NULL;
wl_signal_init(&surface->destroy_signal);
wl_signal_init(&surface->commit_signal);
surface->compositor = compositor;
surface->ref_count = 1;
surface->buffer_viewport.buffer.transform = WL_OUTPUT_TRANSFORM_NORMAL;
surface->buffer_viewport.buffer.scale = 1;
surface->buffer_viewport.buffer.src_width = wl_fixed_from_int(-1);
surface->buffer_viewport.surface.width = -1;
weston_surface_state_init(&surface->pending);
pixman_region32_init(&surface->damage);
pixman_region32_init(&surface->opaque);
region_init_infinite(&surface->input);
wl_list_init(&surface->views);
wl_list_init(&surface->frame_callback_list);
wl_list_init(&surface->feedback_list);
wl_list_init(&surface->subsurface_list);
wl_list_init(&surface->subsurface_list_pending);
weston_matrix_init(&surface->buffer_to_surface_matrix);
weston_matrix_init(&surface->surface_to_buffer_matrix);
wl_list_init(&surface->pointer_constraints);
surface->acquire_fence_fd = -1;
return surface;
}
WL_EXPORT void
weston_surface_set_color(struct weston_surface *surface,
float red, float green, float blue, float alpha)
{
surface->compositor->renderer->surface_set_color(surface, red, green, blue, alpha);
surface->is_opaque = !(alpha < 1.0);
}
WL_EXPORT void
weston_view_to_global_float(struct weston_view *view,
float sx, float sy, float *x, float *y)
{
if (view->transform.enabled) {
struct weston_vector v = { { sx, sy, 0.0f, 1.0f } };
weston_matrix_transform(&view->transform.matrix, &v);
if (fabsf(v.f[3]) < 1e-6) {
weston_log("warning: numerical instability in "
"%s(), divisor = %g\n", __func__,
v.f[3]);
*x = 0;
*y = 0;
return;
}
*x = v.f[0] / v.f[3];
*y = v.f[1] / v.f[3];
} else {
*x = sx + view->geometry.x;
*y = sy + view->geometry.y;
}
}
WL_EXPORT void
weston_transformed_coord(int width, int height,
enum wl_output_transform transform,
int32_t scale,
float sx, float sy, float *bx, float *by)
{
switch (transform) {
case WL_OUTPUT_TRANSFORM_NORMAL:
default:
*bx = sx;
*by = sy;
break;
case WL_OUTPUT_TRANSFORM_FLIPPED:
*bx = width - sx;
*by = sy;
break;
case WL_OUTPUT_TRANSFORM_90:
*bx = height - sy;
*by = sx;
break;
case WL_OUTPUT_TRANSFORM_FLIPPED_90:
*bx = height - sy;
*by = width - sx;
break;
case WL_OUTPUT_TRANSFORM_180:
*bx = width - sx;
*by = height - sy;
break;
case WL_OUTPUT_TRANSFORM_FLIPPED_180:
*bx = sx;
*by = height - sy;
break;
case WL_OUTPUT_TRANSFORM_270:
*bx = sy;
*by = width - sx;
break;
case WL_OUTPUT_TRANSFORM_FLIPPED_270:
*bx = sy;
*by = sx;
break;
}
*bx *= scale;
*by *= scale;
}
WL_EXPORT pixman_box32_t
weston_transformed_rect(int width, int height,
enum wl_output_transform transform,
int32_t scale,
pixman_box32_t rect)
{
float x1, x2, y1, y2;
pixman_box32_t ret;
weston_transformed_coord(width, height, transform, scale,
rect.x1, rect.y1, &x1, &y1);
weston_transformed_coord(width, height, transform, scale,
rect.x2, rect.y2, &x2, &y2);
if (x1 <= x2) {
ret.x1 = x1;
ret.x2 = x2;
} else {
ret.x1 = x2;
ret.x2 = x1;
}
if (y1 <= y2) {
ret.y1 = y1;
ret.y2 = y2;
} else {
ret.y1 = y2;
ret.y2 = y1;
}
return ret;
}
/** Transform a region by a matrix, restricted to axis-aligned transformations
*
* Warning: This function does not work for projective, affine, or matrices
* that encode arbitrary rotations. Only 90-degree step rotations are
* supported.
*/
WL_EXPORT void
weston_matrix_transform_region(pixman_region32_t *dest,
struct weston_matrix *matrix,
pixman_region32_t *src)
{
pixman_box32_t *src_rects, *dest_rects;
int nrects, i;
src_rects = pixman_region32_rectangles(src, &nrects);
dest_rects = malloc(nrects * sizeof(*dest_rects));
if (!dest_rects)
return;
for (i = 0; i < nrects; i++) {
struct weston_vector vec1 = {{
src_rects[i].x1, src_rects[i].y1, 0, 1
}};
weston_matrix_transform(matrix, &vec1);
vec1.f[0] /= vec1.f[3];
vec1.f[1] /= vec1.f[3];
struct weston_vector vec2 = {{
src_rects[i].x2, src_rects[i].y2, 0, 1
}};
weston_matrix_transform(matrix, &vec2);
vec2.f[0] /= vec2.f[3];
vec2.f[1] /= vec2.f[3];
if (vec1.f[0] < vec2.f[0]) {
dest_rects[i].x1 = floor(vec1.f[0]);
dest_rects[i].x2 = ceil(vec2.f[0]);
} else {
dest_rects[i].x1 = floor(vec2.f[0]);
dest_rects[i].x2 = ceil(vec1.f[0]);
}
if (vec1.f[1] < vec2.f[1]) {
dest_rects[i].y1 = floor(vec1.f[1]);
dest_rects[i].y2 = ceil(vec2.f[1]);
} else {
dest_rects[i].y1 = floor(vec2.f[1]);
dest_rects[i].y2 = ceil(vec1.f[1]);
}
}
pixman_region32_clear(dest);
pixman_region32_init_rects(dest, dest_rects, nrects);
free(dest_rects);
}
WL_EXPORT void
weston_transformed_region(int width, int height,
enum wl_output_transform transform,
int32_t scale,
pixman_region32_t *src, pixman_region32_t *dest)
{
pixman_box32_t *src_rects, *dest_rects;
int nrects, i;
if (transform == WL_OUTPUT_TRANSFORM_NORMAL && scale == 1) {
if (src != dest)
pixman_region32_copy(dest, src);
return;
}
src_rects = pixman_region32_rectangles(src, &nrects);
dest_rects = malloc(nrects * sizeof(*dest_rects));
if (!dest_rects)
return;
if (transform == WL_OUTPUT_TRANSFORM_NORMAL) {
memcpy(dest_rects, src_rects, nrects * sizeof(*dest_rects));
} else {
for (i = 0; i < nrects; i++) {
switch (transform) {
default:
case WL_OUTPUT_TRANSFORM_NORMAL:
dest_rects[i].x1 = src_rects[i].x1;
dest_rects[i].y1 = src_rects[i].y1;
dest_rects[i].x2 = src_rects[i].x2;
dest_rects[i].y2 = src_rects[i].y2;
break;
case WL_OUTPUT_TRANSFORM_90:
dest_rects[i].x1 = height - src_rects[i].y2;
dest_rects[i].y1 = src_rects[i].x1;
dest_rects[i].x2 = height - src_rects[i].y1;
dest_rects[i].y2 = src_rects[i].x2;
break;
case WL_OUTPUT_TRANSFORM_180:
dest_rects[i].x1 = width - src_rects[i].x2;
dest_rects[i].y1 = height - src_rects[i].y2;
dest_rects[i].x2 = width - src_rects[i].x1;
dest_rects[i].y2 = height - src_rects[i].y1;
break;
case WL_OUTPUT_TRANSFORM_270:
dest_rects[i].x1 = src_rects[i].y1;
dest_rects[i].y1 = width - src_rects[i].x2;
dest_rects[i].x2 = src_rects[i].y2;
dest_rects[i].y2 = width - src_rects[i].x1;
break;
case WL_OUTPUT_TRANSFORM_FLIPPED:
dest_rects[i].x1 = width - src_rects[i].x2;
dest_rects[i].y1 = src_rects[i].y1;
dest_rects[i].x2 = width - src_rects[i].x1;
dest_rects[i].y2 = src_rects[i].y2;
break;
case WL_OUTPUT_TRANSFORM_FLIPPED_90:
dest_rects[i].x1 = height - src_rects[i].y2;
dest_rects[i].y1 = width - src_rects[i].x2;
dest_rects[i].x2 = height - src_rects[i].y1;
dest_rects[i].y2 = width - src_rects[i].x1;
break;
case WL_OUTPUT_TRANSFORM_FLIPPED_180:
dest_rects[i].x1 = src_rects[i].x1;
dest_rects[i].y1 = height - src_rects[i].y2;
dest_rects[i].x2 = src_rects[i].x2;
dest_rects[i].y2 = height - src_rects[i].y1;
break;
case WL_OUTPUT_TRANSFORM_FLIPPED_270:
dest_rects[i].x1 = src_rects[i].y1;
dest_rects[i].y1 = src_rects[i].x1;
dest_rects[i].x2 = src_rects[i].y2;
dest_rects[i].y2 = src_rects[i].x2;
break;
}
}
}
if (scale != 1) {
for (i = 0; i < nrects; i++) {
dest_rects[i].x1 *= scale;
dest_rects[i].x2 *= scale;
dest_rects[i].y1 *= scale;
dest_rects[i].y2 *= scale;
}
}
pixman_region32_clear(dest);
pixman_region32_init_rects(dest, dest_rects, nrects);
free(dest_rects);
}
static void
viewport_surface_to_buffer(struct weston_surface *surface,
float sx, float sy, float *bx, float *by)
{
struct weston_buffer_viewport *vp = &surface->buffer_viewport;
double src_width, src_height;
double src_x, src_y;
if (vp->buffer.src_width == wl_fixed_from_int(-1)) {
if (vp->surface.width == -1) {
*bx = sx;
*by = sy;
return;
}
src_x = 0.0;
src_y = 0.0;
src_width = surface->width_from_buffer;
src_height = surface->height_from_buffer;
} else {
src_x = wl_fixed_to_double(vp->buffer.src_x);
src_y = wl_fixed_to_double(vp->buffer.src_y);
src_width = wl_fixed_to_double(vp->buffer.src_width);
src_height = wl_fixed_to_double(vp->buffer.src_height);
}
*bx = sx * src_width / surface->width + src_x;
*by = sy * src_height / surface->height + src_y;
}
WL_EXPORT void
weston_surface_to_buffer_float(struct weston_surface *surface,
float sx, float sy, float *bx, float *by)
{
struct weston_buffer_viewport *vp = &surface->buffer_viewport;
/* first transform coordinates if the viewport is set */
viewport_surface_to_buffer(surface, sx, sy, bx, by);
weston_transformed_coord(surface->width_from_buffer,
surface->height_from_buffer,
vp->buffer.transform, vp->buffer.scale,
*bx, *by, bx, by);
}
/** Transform a rectangle from surface coordinates to buffer coordinates
*
* \param surface The surface to fetch wp_viewport and buffer transformation
* from.
* \param rect The rectangle to transform.
* \return The transformed rectangle.
*
* Viewport and buffer transformations can only do translation, scaling,
* and rotations in 90-degree steps. Therefore the only loss in the
* conversion is coordinate rounding.
*
* However, some coordinate rounding takes place as an intermediate
* step before the buffer scale factor is applied, so the rectangle
* boundary may not be exactly as expected.
*
* This is OK for damage tracking since a little extra coverage is
* not a problem.
*/
WL_EXPORT pixman_box32_t
weston_surface_to_buffer_rect(struct weston_surface *surface,
pixman_box32_t rect)
{
struct weston_buffer_viewport *vp = &surface->buffer_viewport;
float xf, yf;
/* first transform box coordinates if the viewport is set */
viewport_surface_to_buffer(surface, rect.x1, rect.y1, &xf, &yf);
rect.x1 = floorf(xf);
rect.y1 = floorf(yf);
viewport_surface_to_buffer(surface, rect.x2, rect.y2, &xf, &yf);
rect.x2 = ceilf(xf);
rect.y2 = ceilf(yf);
return weston_transformed_rect(surface->width_from_buffer,
surface->height_from_buffer,
vp->buffer.transform, vp->buffer.scale,
rect);
}
/** Transform a region from surface coordinates to buffer coordinates
*
* \param surface The surface to fetch wp_viewport and buffer transformation
* from.
* \param surface_region[in] The region in surface coordinates.
* \param buffer_region[out] The region converted to buffer coordinates.
*
* Buffer_region must be init'd, but will be completely overwritten.
*
* Viewport and buffer transformations can only do translation, scaling,
* and rotations in 90-degree steps. Therefore the only loss in the
* conversion is from the coordinate rounding that takes place in
* \ref weston_surface_to_buffer_rect.
*/
WL_EXPORT void
weston_surface_to_buffer_region(struct weston_surface *surface,
pixman_region32_t *surface_region,
pixman_region32_t *buffer_region)
{
pixman_box32_t *src_rects, *dest_rects;
int nrects, i;
src_rects = pixman_region32_rectangles(surface_region, &nrects);
dest_rects = malloc(nrects * sizeof(*dest_rects));
if (!dest_rects)
return;
for (i = 0; i < nrects; i++) {
dest_rects[i] = weston_surface_to_buffer_rect(surface,
src_rects[i]);
}
pixman_region32_fini(buffer_region);
pixman_region32_init_rects(buffer_region, dest_rects, nrects);
free(dest_rects);
}
WL_EXPORT void
weston_view_move_to_plane(struct weston_view *view,
struct weston_plane *plane)
{
if (view->plane == plane)
return;
weston_view_damage_below(view);
view->plane = plane;
weston_surface_damage(view->surface);
}
/** Inflict damage on the plane where the view is visible.
*
* \param view The view that causes the damage.
*
* If the view is currently on a plane (including the primary plane),
* take the view's boundingbox, subtract all the opaque views that cover it,
* and add the remaining region as damage to the plane. This corresponds
* to the damage inflicted to the plane if this view disappeared.
*
* A repaint is scheduled for this view.
*
* The region of all opaque views covering this view is stored in
* weston_view::clip and updated by view_accumulate_damage() during
* weston_output_repaint(). Specifically, that region matches the
* scenegraph as it was last painted.
*/
WL_EXPORT void
weston_view_damage_below(struct weston_view *view)
{
pixman_region32_t damage;
pixman_region32_init(&damage);
pixman_region32_subtract(&damage, &view->transform.boundingbox,
&view->clip);
if (view->plane)
pixman_region32_union(&view->plane->damage,
&view->plane->damage, &damage);
pixman_region32_fini(&damage);
weston_view_schedule_repaint(view);
}
/** Send wl_surface.enter/leave events
*
* \param surface The surface.
* \param head A head of the entered/left output.
* \param enter True if entered.
* \param left True if left.
*
* Send the enter/leave events for all protocol objects bound to the given
* output by the client owning the surface.
*/
static void
weston_surface_send_enter_leave(struct weston_surface *surface,
struct weston_head *head,
bool enter,
bool leave)
{
struct wl_resource *wloutput;
struct wl_client *client;
assert(enter != leave);
client = wl_resource_get_client(surface->resource);
wl_resource_for_each(wloutput, &head->resource_list) {
if (wl_resource_get_client(wloutput) != client)
continue;
if (enter)
wl_surface_send_enter(surface->resource, wloutput);
if (leave)
wl_surface_send_leave(surface->resource, wloutput);
}
}
/**
* \param es The surface
* \param mask The new set of outputs for the surface
*
* Sets the surface's set of outputs to the ones specified by
* the new output mask provided. Identifies the outputs that
* have changed, the posts enter and leave events for these
* outputs as appropriate.
*/
static void
weston_surface_update_output_mask(struct weston_surface *es, uint32_t mask)
{
uint32_t different = es->output_mask ^ mask;
uint32_t entered = mask & different;
uint32_t left = es->output_mask & different;
uint32_t output_bit;
struct weston_output *output;
struct weston_head *head;
es->output_mask = mask;
if (es->resource == NULL)
return;
if (different == 0)
return;
wl_list_for_each(output, &es->compositor->output_list, link) {
output_bit = 1u << output->id;
if (!(output_bit & different))
continue;
wl_list_for_each(head, &output->head_list, output_link) {
weston_surface_send_enter_leave(es, head,
output_bit & entered,
output_bit & left);
}
}
}
static void
notify_view_output_destroy(struct wl_listener *listener, void *data)
{
struct weston_view *view =
container_of(listener,
struct weston_view, output_destroy_listener);
view->output = NULL;
view->output_destroy_listener.notify = NULL;
}
/** Set the primary output of the view
*
* \param view The view whose primary output to set
* \param output The new primary output for the view
*
* Set \a output to be the primary output of the \a view.
*
* Notice that the assignment may be temporary; the primary output could be
* automatically changed. Hence, one cannot rely on the value persisting.
*
* Passing NULL as /a output will set the primary output to NULL.
*/
WL_EXPORT void
weston_view_set_output(struct weston_view *view, struct weston_output *output)
{
if (view->output_destroy_listener.notify) {
wl_list_remove(&view->output_destroy_listener.link);
view->output_destroy_listener.notify = NULL;
}
view->output = output;
if (output) {
view->output_destroy_listener.notify =
notify_view_output_destroy;
wl_signal_add(&output->destroy_signal,
&view->output_destroy_listener);
}
}
/** Recalculate which output(s) the surface has views displayed on
*
* \param es The surface to remap to outputs
*
* Finds the output that is showing the largest amount of one
* of the surface's various views. This output becomes the
* surface's primary output for vsync and frame callback purposes.
*
* Also notes all outputs of all of the surface's views
* in the output_mask for the surface.
*/
static void
weston_surface_assign_output(struct weston_surface *es)
{
struct weston_output *new_output;
struct weston_view *view;
pixman_region32_t region;
uint32_t max, area, mask;
pixman_box32_t *e;
new_output = NULL;
max = 0;
mask = 0;
pixman_region32_init(&region);
wl_list_for_each(view, &es->views, surface_link) {
if (!view->output)
continue;
pixman_region32_intersect(&region, &view->transform.boundingbox,
&view->output->region);
e = pixman_region32_extents(&region);
area = (e->x2 - e->x1) * (e->y2 - e->y1);
mask |= view->output_mask;
if (area >= max) {
new_output = view->output;
max = area;
}
}
pixman_region32_fini(&region);
es->output = new_output;
weston_surface_update_output_mask(es, mask);
}
/** Recalculate which output(s) the view is displayed on
*
* \param ev The view to remap to outputs
*
* Identifies the set of outputs that the view is visible on,
* noting them into the output_mask. The output that the view
* is most visible on is set as the view's primary output.
*
* Also does the same for the view's surface. See
* weston_surface_assign_output().
*/
static void
weston_view_assign_output(struct weston_view *ev)
{
struct weston_compositor *ec = ev->surface->compositor;
struct weston_output *output, *new_output;
pixman_region32_t region;
uint32_t max, area, mask;
pixman_box32_t *e;
new_output = NULL;
max = 0;
mask = 0;
pixman_region32_init(&region);
wl_list_for_each(output, &ec->output_list, link) {
if (output->destroying)
continue;
pixman_region32_intersect(&region, &ev->transform.boundingbox,
&output->region);
e = pixman_region32_extents(&region);
area = (e->x2 - e->x1) * (e->y2 - e->y1);
if (area > 0)
mask |= 1u << output->id;
if (area >= max) {
new_output = output;
max = area;
}
}
pixman_region32_fini(&region);
weston_view_set_output(ev, new_output);
ev->output_mask = mask;
weston_surface_assign_output(ev->surface);
}
static void
weston_view_to_view_map(struct weston_view *from, struct weston_view *to,
int from_x, int from_y, int *to_x, int *to_y)
{
float x, y;
weston_view_to_global_float(from, from_x, from_y, &x, &y);
weston_view_from_global_float(to, x, y, &x, &y);
*to_x = round(x);
*to_y = round(y);
}
static void
weston_view_transfer_scissor(struct weston_view *from, struct weston_view *to)
{
pixman_box32_t *a;
pixman_box32_t b;
a = pixman_region32_extents(&from->geometry.scissor);
weston_view_to_view_map(from, to, a->x1, a->y1, &b.x1, &b.y1);
weston_view_to_view_map(from, to, a->x2, a->y2, &b.x2, &b.y2);
pixman_region32_fini(&to->geometry.scissor);
pixman_region32_init_with_extents(&to->geometry.scissor, &b);
}
static void
view_compute_bbox(struct weston_view *view, const pixman_box32_t *inbox,
pixman_region32_t *bbox)
{
float min_x = HUGE_VALF, min_y = HUGE_VALF;
float max_x = -HUGE_VALF, max_y = -HUGE_VALF;
int32_t s[4][2] = {
{ inbox->x1, inbox->y1 },
{ inbox->x1, inbox->y2 },
{ inbox->x2, inbox->y1 },
{ inbox->x2, inbox->y2 },
};
float int_x, int_y;
int i;
if (inbox->x1 == inbox->x2 || inbox->y1 == inbox->y2) {
/* avoid rounding empty bbox to 1x1 */
pixman_region32_init(bbox);
return;
}
for (i = 0; i < 4; ++i) {
float x, y;
weston_view_to_global_float(view, s[i][0], s[i][1], &x, &y);
if (x < min_x)
min_x = x;
if (x > max_x)
max_x = x;
if (y < min_y)
min_y = y;
if (y > max_y)
max_y = y;
}
int_x = floorf(min_x);
int_y = floorf(min_y);
pixman_region32_init_rect(bbox, int_x, int_y,
ceilf(max_x) - int_x, ceilf(max_y) - int_y);
}
static void
weston_view_update_transform_disable(struct weston_view *view)
{
view->transform.enabled = 0;
/* round off fractions when not transformed */
view->geometry.x = roundf(view->geometry.x);
view->geometry.y = roundf(view->geometry.y);
/* Otherwise identity matrix, but with x and y translation. */
view->transform.position.matrix.type = WESTON_MATRIX_TRANSFORM_TRANSLATE;
view->transform.position.matrix.d[12] = view->geometry.x;
view->transform.position.matrix.d[13] = view->geometry.y;
view->transform.matrix = view->transform.position.matrix;
view->transform.inverse = view->transform.position.matrix;
view->transform.inverse.d[12] = -view->geometry.x;
view->transform.inverse.d[13] = -view->geometry.y;
pixman_region32_init_rect(&view->transform.boundingbox,
0, 0,
view->surface->width,
view->surface->height);
if (view->geometry.scissor_enabled)
pixman_region32_intersect(&view->transform.boundingbox,
&view->transform.boundingbox,
&view->geometry.scissor);
pixman_region32_translate(&view->transform.boundingbox,
view->geometry.x, view->geometry.y);
if (view->alpha == 1.0) {
pixman_region32_copy(&view->transform.opaque,
&view->surface->opaque);
pixman_region32_translate(&view->transform.opaque,
view->geometry.x,
view->geometry.y);
}
}
static int
weston_view_update_transform_enable(struct weston_view *view)
{
struct weston_view *parent = view->geometry.parent;
struct weston_matrix *matrix = &view->transform.matrix;
struct weston_matrix *inverse = &view->transform.inverse;
struct weston_transform *tform;
pixman_region32_t surfregion;
const pixman_box32_t *surfbox;
view->transform.enabled = 1;
/* Otherwise identity matrix, but with x and y translation. */
view->transform.position.matrix.type = WESTON_MATRIX_TRANSFORM_TRANSLATE;
view->transform.position.matrix.d[12] = view->geometry.x;
view->transform.position.matrix.d[13] = view->geometry.y;
weston_matrix_init(matrix);
wl_list_for_each(tform, &view->geometry.transformation_list, link)
weston_matrix_multiply(matrix, &tform->matrix);
if (parent)
weston_matrix_multiply(matrix, &parent->transform.matrix);
if (weston_matrix_invert(inverse, matrix) < 0) {
/* Oops, bad total transformation, not invertible */
weston_log("error: weston_view %p"
" transformation not invertible.\n", view);
return -1;
}
if (view->alpha == 1.0 &&
matrix->type == WESTON_MATRIX_TRANSFORM_TRANSLATE) {
pixman_region32_copy(&view->transform.opaque,
&view->surface->opaque);
pixman_region32_translate(&view->transform.opaque,
matrix->d[12],
matrix->d[13]);
}
pixman_region32_init_rect(&surfregion, 0, 0,
view->surface->width, view->surface->height);
if (view->geometry.scissor_enabled)
pixman_region32_intersect(&surfregion, &surfregion,
&view->geometry.scissor);
surfbox = pixman_region32_extents(&surfregion);
view_compute_bbox(view, surfbox, &view->transform.boundingbox);
pixman_region32_fini(&surfregion);
return 0;
}
static struct weston_layer *
get_view_layer(struct weston_view *view)
{
if (view->parent_view)
return get_view_layer(view->parent_view);
return view->layer_link.layer;
}
WL_EXPORT void
weston_view_update_transform(struct weston_view *view)
{
struct weston_view *parent = view->geometry.parent;
struct weston_layer *layer;
pixman_region32_t mask;
if (!view->transform.dirty)
return;
if (parent)
weston_view_update_transform(parent);
view->transform.dirty = 0;
weston_view_damage_below(view);
pixman_region32_fini(&view->transform.boundingbox);
pixman_region32_fini(&view->transform.opaque);
pixman_region32_init(&view->transform.opaque);
/* transform.position is always in transformation_list */
if (view->geometry.transformation_list.next ==
&view->transform.position.link &&
view->geometry.transformation_list.prev ==
&view->transform.position.link &&
!parent) {
weston_view_update_transform_disable(view);
} else {
if (weston_view_update_transform_enable(view) < 0)
weston_view_update_transform_disable(view);
}
layer = get_view_layer(view);
if (layer) {
pixman_region32_init_with_extents(&mask, &layer->mask);
pixman_region32_intersect(&view->transform.boundingbox,
&view->transform.boundingbox, &mask);
pixman_region32_intersect(&view->transform.opaque,
&view->transform.opaque, &mask);
pixman_region32_fini(&mask);
}
if (parent) {
if (parent->geometry.scissor_enabled) {
view->geometry.scissor_enabled = true;
weston_view_transfer_scissor(parent, view);
} else {
view->geometry.scissor_enabled = false;
}
}
weston_view_damage_below(view);
weston_view_assign_output(view);
wl_signal_emit(&view->surface->compositor->transform_signal,
view->surface);
}
WL_EXPORT void
weston_view_geometry_dirty(struct weston_view *view)
{
struct weston_view *child;
/*
* The invariant: if view->geometry.dirty, then all views
* in view->geometry.child_list have geometry.dirty too.
* Corollary: if not parent->geometry.dirty, then all ancestors
* are not dirty.
*/
if (view->transform.dirty)
return;
view->transform.dirty = 1;
wl_list_for_each(child, &view->geometry.child_list,
geometry.parent_link)
weston_view_geometry_dirty(child);
}
WL_EXPORT void
weston_view_to_global_fixed(struct weston_view *view,
wl_fixed_t vx, wl_fixed_t vy,
wl_fixed_t *x, wl_fixed_t *y)
{
float xf, yf;
weston_view_to_global_float(view,
wl_fixed_to_double(vx),
wl_fixed_to_double(vy),
&xf, &yf);
*x = wl_fixed_from_double(xf);
*y = wl_fixed_from_double(yf);
}
WL_EXPORT void
weston_view_from_global_float(struct weston_view *view,
float x, float y, float *vx, float *vy)
{
if (view->transform.enabled) {
struct weston_vector v = { { x, y, 0.0f, 1.0f } };
weston_matrix_transform(&view->transform.inverse, &v);
if (fabsf(v.f[3]) < 1e-6) {
weston_log("warning: numerical instability in "
"weston_view_from_global(), divisor = %g\n",
v.f[3]);
*vx = 0;
*vy = 0;
return;
}
*vx = v.f[0] / v.f[3];
*vy = v.f[1] / v.f[3];
} else {
*vx = x - view->geometry.x;
*vy = y - view->geometry.y;
}
}
WL_EXPORT void
weston_view_from_global_fixed(struct weston_view *view,
wl_fixed_t x, wl_fixed_t y,
wl_fixed_t *vx, wl_fixed_t *vy)
{
float vxf, vyf;
weston_view_from_global_float(view,
wl_fixed_to_double(x),
wl_fixed_to_double(y),
&vxf, &vyf);
*vx = wl_fixed_from_double(vxf);
*vy = wl_fixed_from_double(vyf);
}
WL_EXPORT void
weston_view_from_global(struct weston_view *view,
int32_t x, int32_t y, int32_t *vx, int32_t *vy)
{
float vxf, vyf;
weston_view_from_global_float(view, x, y, &vxf, &vyf);
*vx = floorf(vxf);
*vy = floorf(vyf);
}
/**
* \param surface The surface to be repainted
*
* Marks the output(s) that the surface is shown on as needing to be
* repainted. See weston_output_schedule_repaint().
*/
WL_EXPORT void
weston_surface_schedule_repaint(struct weston_surface *surface)
{
struct weston_output *output;
wl_list_for_each(output, &surface->compositor->output_list, link)
if (surface->output_mask & (1u << output->id))
weston_output_schedule_repaint(output);
}
/**
* \param view The view to be repainted
*
* Marks the output(s) that the view is shown on as needing to be
* repainted. See weston_output_schedule_repaint().
*/
WL_EXPORT void
weston_view_schedule_repaint(struct weston_view *view)
{
struct weston_output *output;
wl_list_for_each(output, &view->surface->compositor->output_list, link)
if (view->output_mask & (1u << output->id))
weston_output_schedule_repaint(output);
}
/**
* XXX: This function does it the wrong way.
* surface->damage is the damage from the client, and causes
* surface_flush_damage() to copy pixels. No window management action can
* cause damage to the client-provided content, warranting re-upload!
*
* Instead of surface->damage, this function should record the damage
* with all the views for this surface to avoid extraneous texture
* uploads.
*/
WL_EXPORT void
weston_surface_damage(struct weston_surface *surface)
{
pixman_region32_union_rect(&surface->damage, &surface->damage,
0, 0, surface->width,
surface->height);
weston_surface_schedule_repaint(surface);
}
WL_EXPORT void
weston_view_set_position(struct weston_view *view, float x, float y)
{
if (view->geometry.x == x && view->geometry.y == y)
return;
view->geometry.x = x;
view->geometry.y = y;
weston_view_geometry_dirty(view);
}
static void
transform_parent_handle_parent_destroy(struct wl_listener *listener,
void *data)
{
struct weston_view *view =
container_of(listener, struct weston_view,
geometry.parent_destroy_listener);
weston_view_set_transform_parent(view, NULL);
}
WL_EXPORT void
weston_view_set_transform_parent(struct weston_view *view,
struct weston_view *parent)
{
if (view->geometry.parent) {
wl_list_remove(&view->geometry.parent_destroy_listener.link);
wl_list_remove(&view->geometry.parent_link);
if (!parent)
view->geometry.scissor_enabled = false;
}
view->geometry.parent = parent;
view->geometry.parent_destroy_listener.notify =
transform_parent_handle_parent_destroy;
if (parent) {
wl_signal_add(&parent->destroy_signal,
&view->geometry.parent_destroy_listener);
wl_list_insert(&parent->geometry.child_list,
&view->geometry.parent_link);
}
weston_view_geometry_dirty(view);
}
/** Set a clip mask rectangle on a view
*
* \param view The view to set the clip mask on.
* \param x Top-left corner X coordinate of the clip rectangle.
* \param y Top-left corner Y coordinate of the clip rectangle.
* \param width Width of the clip rectangle, non-negative.
* \param height Height of the clip rectangle, non-negative.
*
* A shell may set a clip mask rectangle on a view. Everything outside
* the rectangle is cut away for input and output purposes: it is
* not drawn and cannot be hit by hit-test based input like pointer
* motion or touch-downs. Everything inside the rectangle will behave
* normally. Clients are unaware of clipping.
*
* The rectangle is set in surface-local coordinates. Setting a clip
* mask rectangle does not affect the view position, the view is positioned
* as it would be without a clip. The clip also does not change
* weston_surface::width,height.
*
* The clip mask rectangle is part of transformation inheritance
* (weston_view_set_transform_parent()). A clip set in the root of the
* transformation inheritance tree will affect all views in the tree.
* A clip can be set only on the root view. Attempting to set a clip
* on view that has a transformation parent will fail. Assigning a parent
* to a view that has a clip set will cause the clip to be forgotten.
*
* Because the clip mask is an axis-aligned rectangle, it poses restrictions
* on the additional transformations in the child views. These transformations
* may not rotate the coordinate axes, i.e., only translation and scaling
* are allowed. Violating this restriction causes the clipping to malfunction.
* Furthermore, using scaling may cause rounding errors in child clipping.
*
* The clip mask rectangle is not automatically adjusted based on
* wl_surface.attach dx and dy arguments.
*
* A clip mask rectangle can be set only if the compositor capability
* WESTON_CAP_VIEW_CLIP_MASK is present.
*
* This function sets the clip mask rectangle and schedules a repaint for
* the view.
*/
WL_EXPORT void
weston_view_set_mask(struct weston_view *view,
int x, int y, int width, int height)
{
struct weston_compositor *compositor = view->surface->compositor;
if (!(compositor->capabilities & WESTON_CAP_VIEW_CLIP_MASK)) {
weston_log("%s not allowed without capability!\n", __func__);
return;
}
if (view->geometry.parent) {
weston_log("view %p has a parent, clip forbidden!\n", view);
return;
}
if (width < 0 || height < 0) {
weston_log("%s: illegal args %d, %d, %d, %d\n", __func__,
x, y, width, height);
return;
}
pixman_region32_fini(&view->geometry.scissor);
pixman_region32_init_rect(&view->geometry.scissor, x, y, width, height);
view->geometry.scissor_enabled = true;
weston_view_geometry_dirty(view);
weston_view_schedule_repaint(view);
}
/** Remove the clip mask from a view
*
* \param view The view to remove the clip mask from.
*
* Removed the clip mask rectangle and schedules a repaint.
*
* \sa weston_view_set_mask
*/
WL_EXPORT void
weston_view_set_mask_infinite(struct weston_view *view)
{
view->geometry.scissor_enabled = false;
weston_view_geometry_dirty(view);
weston_view_schedule_repaint(view);
}
/* Check if view should be displayed
*
* The indicator is set manually when assigning
* a view to a surface.
*
* This needs reworking. See the thread starting at:
*
* https://lists.freedesktop.org/archives/wayland-devel/2016-June/029656.html
*/
WL_EXPORT bool
weston_view_is_mapped(struct weston_view *view)
{
return view->is_mapped;
}
/* Check if view is opaque in specified region
*
* \param view The view to check for opacity.
* \param region The region to check for opacity, in view coordinates.
*
* Returns true if the view is opaque in the specified region, because view
* alpha is 1.0 and either the opaque region set by the client contains the
* specified region, or the buffer pixel format or solid color is opaque.
*/
WL_EXPORT bool
weston_view_is_opaque(struct weston_view *ev, pixman_region32_t *region)
{
pixman_region32_t r;
bool ret = false;
if (ev->alpha < 1.0)
return false;
if (ev->surface->is_opaque)
return true;
if (ev->transform.dirty) {
weston_log("%s: transform dirty", __func__);
return false;
}
pixman_region32_init(&r);
pixman_region32_subtract(&r, region, &ev->transform.opaque);
if (!pixman_region32_not_empty(&r))
ret = true;
pixman_region32_fini(&r);
return ret;
}
/* Check if a surface has a view assigned to it
*
* The indicator is set manually when mapping
* a surface and creating a view for it.
*
* This needs to go. See the thread starting at:
*
* https://lists.freedesktop.org/archives/wayland-devel/2016-June/029656.html
*
*/
WL_EXPORT bool
weston_surface_is_mapped(struct weston_surface *surface)
{
return surface->is_mapped;
}
static void
surface_set_size(struct weston_surface *surface, int32_t width, int32_t height)
{
struct weston_view *view;
if (surface->width == width && surface->height == height)
return;
surface->width = width;
surface->height = height;
wl_list_for_each(view, &surface->views, surface_link)
weston_view_geometry_dirty(view);
}
WL_EXPORT void
weston_surface_set_size(struct weston_surface *surface,
int32_t width, int32_t height)
{
assert(!surface->resource);
surface_set_size(surface, width, height);
}
static int
fixed_round_up_to_int(wl_fixed_t f)
{
return wl_fixed_to_int(wl_fixed_from_int(1) - 1 + f);
}
static void
convert_size_by_transform_scale(int32_t *width_out, int32_t *height_out,
int32_t width, int32_t height,
uint32_t transform,
int32_t scale)
{
assert(scale > 0);
switch (transform) {
case WL_OUTPUT_TRANSFORM_NORMAL:
case WL_OUTPUT_TRANSFORM_180:
case WL_OUTPUT_TRANSFORM_FLIPPED:
case WL_OUTPUT_TRANSFORM_FLIPPED_180:
*width_out = width / scale;
*height_out = height / scale;
break;
case WL_OUTPUT_TRANSFORM_90:
case WL_OUTPUT_TRANSFORM_270:
case WL_OUTPUT_TRANSFORM_FLIPPED_90:
case WL_OUTPUT_TRANSFORM_FLIPPED_270:
*width_out = height / scale;
*height_out = width / scale;
break;
default:
assert(0 && "invalid transform");
}
}
static void
weston_surface_calculate_size_from_buffer(struct weston_surface *surface)
{
struct weston_buffer_viewport *vp = &surface->buffer_viewport;
if (!surface->buffer_ref.buffer) {
surface->width_from_buffer = 0;
surface->height_from_buffer = 0;
return;
}
convert_size_by_transform_scale(&surface->width_from_buffer,
&surface->height_from_buffer,
surface->buffer_ref.buffer->width,
surface->buffer_ref.buffer->height,
vp->buffer.transform,
vp->buffer.scale);
}
static void
weston_surface_update_size(struct weston_surface *surface)
{
struct weston_buffer_viewport *vp = &surface->buffer_viewport;
int32_t width, height;
width = surface->width_from_buffer;
height = surface->height_from_buffer;
if (width != 0 && vp->surface.width != -1) {
surface_set_size(surface,
vp->surface.width, vp->surface.height);
return;
}
if (width != 0 && vp->buffer.src_width != wl_fixed_from_int(-1)) {
int32_t w = fixed_round_up_to_int(vp->buffer.src_width);
int32_t h = fixed_round_up_to_int(vp->buffer.src_height);
surface_set_size(surface, w ?: 1, h ?: 1);
return;
}
surface_set_size(surface, width, height);
}
WL_EXPORT void
weston_compositor_get_time(struct timespec *time)
{
clock_gettime(CLOCK_REALTIME, time);
}
WL_EXPORT struct weston_view *
weston_compositor_pick_view(struct weston_compositor *compositor,
wl_fixed_t x, wl_fixed_t y,
wl_fixed_t *vx, wl_fixed_t *vy)
{
struct weston_view *view;
wl_fixed_t view_x, view_y;
int view_ix, view_iy;
int ix = wl_fixed_to_int(x);
int iy = wl_fixed_to_int(y);
wl_list_for_each(view, &compositor->view_list, link) {
if (!pixman_region32_contains_point(
&view->transform.boundingbox, ix, iy, NULL))
continue;
weston_view_from_global_fixed(view, x, y, &view_x, &view_y);
view_ix = wl_fixed_to_int(view_x);
view_iy = wl_fixed_to_int(view_y);
if (!pixman_region32_contains_point(&view->surface->input,
view_ix, view_iy, NULL))
continue;
if (view->geometry.scissor_enabled &&
!pixman_region32_contains_point(&view->geometry.scissor,
view_ix, view_iy, NULL))
continue;
*vx = view_x;
*vy = view_y;
return view;
}
*vx = wl_fixed_from_int(-1000000);
*vy = wl_fixed_from_int(-1000000);
return NULL;
}
static void
weston_compositor_repick(struct weston_compositor *compositor)
{
struct weston_seat *seat;
if (!compositor->session_active)
return;
wl_list_for_each(seat, &compositor->seat_list, link)
weston_seat_repick(seat);
}
WL_EXPORT void
weston_view_unmap(struct weston_view *view)
{
struct weston_seat *seat;
if (!weston_view_is_mapped(view))
return;
weston_view_damage_below(view);
weston_view_set_output(view, NULL);
view->plane = NULL;
view->is_mapped = false;
weston_layer_entry_remove(&view->layer_link);
wl_list_remove(&view->link);
wl_list_init(&view->link);
view->output_mask = 0;
weston_surface_assign_output(view->surface);
if (weston_surface_is_mapped(view->surface))
return;
wl_list_for_each(seat, &view->surface->compositor->seat_list, link) {
struct weston_touch *touch = weston_seat_get_touch(seat);
struct weston_pointer *pointer = weston_seat_get_pointer(seat);
struct weston_keyboard *keyboard =
weston_seat_get_keyboard(seat);
if (keyboard && keyboard->focus == view->surface)
weston_keyboard_set_focus(keyboard, NULL);
if (pointer && pointer->focus == view)
weston_pointer_clear_focus(pointer);
if (touch && touch->focus == view)
weston_touch_set_focus(touch, NULL);
}
}
WL_EXPORT void
weston_surface_unmap(struct weston_surface *surface)
{
struct weston_view *view;
surface->is_mapped = false;
wl_list_for_each(view, &surface->views, surface_link)
weston_view_unmap(view);
surface->output = NULL;
}
static void
weston_surface_reset_pending_buffer(struct weston_surface *surface)
{
weston_surface_state_set_buffer(&surface->pending, NULL);
surface->pending.sx = 0;
surface->pending.sy = 0;
surface->pending.newly_attached = 0;
surface->pending.buffer_viewport.changed = 0;
}
WL_EXPORT void
weston_view_destroy(struct weston_view *view)
{
wl_signal_emit(&view->destroy_signal, view);
assert(wl_list_empty(&view->geometry.child_list));
if (weston_view_is_mapped(view)) {
weston_view_unmap(view);
weston_compositor_build_view_list(view->surface->compositor);
}
wl_list_remove(&view->link);
weston_layer_entry_remove(&view->layer_link);
pixman_region32_fini(&view->clip);
pixman_region32_fini(&view->geometry.scissor);
pixman_region32_fini(&view->transform.boundingbox);
pixman_region32_fini(&view->transform.opaque);
weston_view_set_transform_parent(view, NULL);
weston_view_set_output(view, NULL);
wl_list_remove(&view->surface_link);
free(view);
}
WL_EXPORT void
weston_surface_destroy(struct weston_surface *surface)
{
struct weston_frame_callback *cb, *next;
struct weston_view *ev, *nv;
struct weston_pointer_constraint *constraint, *next_constraint;
if (--surface->ref_count > 0)
return;
assert(surface->resource == NULL);
wl_signal_emit(&surface->destroy_signal, surface);
assert(wl_list_empty(&surface->subsurface_list_pending));
assert(wl_list_empty(&surface->subsurface_list));
wl_list_for_each_safe(ev, nv, &surface->views, surface_link)
weston_view_destroy(ev);
weston_surface_state_fini(&surface->pending);
weston_buffer_reference(&surface->buffer_ref, NULL);
weston_buffer_release_reference(&surface->buffer_release_ref, NULL);
pixman_region32_fini(&surface->damage);
pixman_region32_fini(&surface->opaque);
pixman_region32_fini(&surface->input);
wl_list_for_each_safe(cb, next, &surface->frame_callback_list, link)
wl_resource_destroy(cb->resource);
weston_presentation_feedback_discard_list(&surface->feedback_list);
wl_list_for_each_safe(constraint, next_constraint,
&surface->pointer_constraints,
link)
weston_pointer_constraint_destroy(constraint);
fd_clear(&surface->acquire_fence_fd);
free(surface);
}
static void
destroy_surface(struct wl_resource *resource)
{
struct weston_surface *surface = wl_resource_get_user_data(resource);
assert(surface);
/* Set the resource to NULL, since we don't want to leave a
* dangling pointer if the surface was refcounted and survives
* the weston_surface_destroy() call. */
surface->resource = NULL;
if (surface->viewport_resource)
wl_resource_set_user_data(surface->viewport_resource, NULL);
if (surface->synchronization_resource) {
wl_resource_set_user_data(surface->synchronization_resource,
NULL);
}
weston_surface_destroy(surface);
}
static void
weston_buffer_destroy_handler(struct wl_listener *listener, void *data)
{
struct weston_buffer *buffer =
container_of(listener, struct weston_buffer, destroy_listener);
wl_signal_emit(&buffer->destroy_signal, buffer);
free(buffer);
}
WL_EXPORT struct weston_buffer *
weston_buffer_from_resource(struct wl_resource *resource)
{
struct weston_buffer *buffer;
struct wl_listener *listener;
listener = wl_resource_get_destroy_listener(resource,
weston_buffer_destroy_handler);
if (listener)
return container_of(listener, struct weston_buffer,
destroy_listener);
buffer = zalloc(sizeof *buffer);
if (buffer == NULL)
return NULL;
buffer->resource = resource;
wl_signal_init(&buffer->destroy_signal);
buffer->destroy_listener.notify = weston_buffer_destroy_handler;
buffer->y_inverted = 1;
wl_resource_add_destroy_listener(resource, &buffer->destroy_listener);
return buffer;
}
static void
weston_buffer_reference_handle_destroy(struct wl_listener *listener,
void *data)
{
struct weston_buffer_reference *ref =
container_of(listener, struct weston_buffer_reference,
destroy_listener);
assert((struct weston_buffer *)data == ref->buffer);
ref->buffer = NULL;
}
WL_EXPORT void
weston_buffer_reference(struct weston_buffer_reference *ref,
struct weston_buffer *buffer)
{
if (ref->buffer && buffer != ref->buffer) {
ref->buffer->busy_count--;
if (ref->buffer->busy_count == 0) {
assert(wl_resource_get_client(ref->buffer->resource));
wl_buffer_send_release(ref->buffer->resource);
}
wl_list_remove(&ref->destroy_listener.link);
}
if (buffer && buffer != ref->buffer) {
buffer->busy_count++;
wl_signal_add(&buffer->destroy_signal,
&ref->destroy_listener);
}
ref->buffer = buffer;
ref->destroy_listener.notify = weston_buffer_reference_handle_destroy;
}
static void
weston_buffer_release_reference_handle_destroy(struct wl_listener *listener,
void *data)
{
struct weston_buffer_release_reference *ref =
container_of(listener, struct weston_buffer_release_reference,
destroy_listener);
assert((struct wl_resource *)data == ref->buffer_release->resource);
ref->buffer_release = NULL;
}
static void
weston_buffer_release_destroy(struct weston_buffer_release *buffer_release)
{
struct wl_resource *resource = buffer_release->resource;
int release_fence_fd = buffer_release->fence_fd;
if (release_fence_fd >= 0) {
zwp_linux_buffer_release_v1_send_fenced_release(
resource, release_fence_fd);
} else {
zwp_linux_buffer_release_v1_send_immediate_release(
resource);
}
wl_resource_destroy(resource);
}
WL_EXPORT void
weston_buffer_release_reference(struct weston_buffer_release_reference *ref,
struct weston_buffer_release *buffer_release)
{
if (buffer_release == ref->buffer_release)
return;
if (ref->buffer_release) {
ref->buffer_release->ref_count--;
wl_list_remove(&ref->destroy_listener.link);
if (ref->buffer_release->ref_count == 0)
weston_buffer_release_destroy(ref->buffer_release);
}
if (buffer_release) {
buffer_release->ref_count++;
wl_resource_add_destroy_listener(buffer_release->resource,
&ref->destroy_listener);
}
ref->buffer_release = buffer_release;
ref->destroy_listener.notify =
weston_buffer_release_reference_handle_destroy;
}
WL_EXPORT void
weston_buffer_release_move(struct weston_buffer_release_reference *dest,
struct weston_buffer_release_reference *src)
{
weston_buffer_release_reference(dest, src->buffer_release);
weston_buffer_release_reference(src, NULL);
}
static void
weston_surface_attach(struct weston_surface *surface,
struct weston_buffer *buffer)
{
weston_buffer_reference(&surface->buffer_ref, buffer);
if (!buffer) {
if (weston_surface_is_mapped(surface))
weston_surface_unmap(surface);
}
surface->compositor->renderer->attach(surface, buffer);
weston_surface_calculate_size_from_buffer(surface);
weston_presentation_feedback_discard_list(&surface->feedback_list);
}
WL_EXPORT void
weston_compositor_damage_all(struct weston_compositor *compositor)
{
struct weston_output *output;
wl_list_for_each(output, &compositor->output_list, link)
weston_output_damage(output);
}
WL_EXPORT void
weston_output_damage(struct weston_output *output)
{
struct weston_compositor *compositor = output->compositor;
pixman_region32_union(&compositor->primary_plane.damage,
&compositor->primary_plane.damage,
&output->region);
weston_output_schedule_repaint(output);
}
static void
surface_flush_damage(struct weston_surface *surface)
{
if (surface->buffer_ref.buffer &&
wl_shm_buffer_get(surface->buffer_ref.buffer->resource))
surface->compositor->renderer->flush_damage(surface);
if (weston_timeline_enabled_ &&
pixman_region32_not_empty(&surface->damage))
TL_POINT("core_flush_damage", TLP_SURFACE(surface),
TLP_OUTPUT(surface->output), TLP_END);
pixman_region32_clear(&surface->damage);
}
static void
view_accumulate_damage(struct weston_view *view,
pixman_region32_t *opaque)
{
pixman_region32_t damage;
pixman_region32_init(&damage);
if (view->transform.enabled) {
pixman_box32_t *extents;
extents = pixman_region32_extents(&view->surface->damage);
view_compute_bbox(view, extents, &damage);
} else {
pixman_region32_copy(&damage, &view->surface->damage);
pixman_region32_translate(&damage,
view->geometry.x, view->geometry.y);
}
pixman_region32_intersect(&damage, &damage,
&view->transform.boundingbox);
pixman_region32_subtract(&damage, &damage, opaque);
pixman_region32_union(&view->plane->damage,
&view->plane->damage, &damage);
pixman_region32_fini(&damage);
pixman_region32_copy(&view->clip, opaque);
pixman_region32_union(opaque, opaque, &view->transform.opaque);
}
static void
compositor_accumulate_damage(struct weston_compositor *ec)
{
struct weston_plane *plane;
struct weston_view *ev;
pixman_region32_t opaque, clip;
pixman_region32_init(&clip);
wl_list_for_each(plane, &ec->plane_list, link) {
pixman_region32_copy(&plane->clip, &clip);
pixman_region32_init(&opaque);
wl_list_for_each(ev, &ec->view_list, link) {
if (ev->plane != plane)
continue;
view_accumulate_damage(ev, &opaque);
}
pixman_region32_union(&clip, &clip, &opaque);
pixman_region32_fini(&opaque);
}
pixman_region32_fini(&clip);
wl_list_for_each(ev, &ec->view_list, link)
ev->surface->touched = false;
wl_list_for_each(ev, &ec->view_list, link) {
if (ev->surface->touched)
continue;
ev->surface->touched = true;
surface_flush_damage(ev->surface);
/* Both the renderer and the backend have seen the buffer
* by now. If renderer needs the buffer, it has its own
* reference set. If the backend wants to keep the buffer
* around for migrating the surface into a non-primary plane
* later, keep_buffer is true. Otherwise, drop the core
* reference now, and allow early buffer release. This enables
* clients to use single-buffering.
*/
if (!ev->surface->keep_buffer) {
weston_buffer_reference(&ev->surface->buffer_ref, NULL);
weston_buffer_release_reference(
&ev->surface->buffer_release_ref, NULL);
}
}
}
static void
surface_stash_subsurface_views(struct weston_surface *surface)
{
struct weston_subsurface *sub;
wl_list_for_each(sub, &surface->subsurface_list, parent_link) {
if (sub->surface == surface)
continue;
wl_list_insert_list(&sub->unused_views, &sub->surface->views);
wl_list_init(&sub->surface->views);
surface_stash_subsurface_views(sub->surface);
}
}
static void
surface_free_unused_subsurface_views(struct weston_surface *surface)
{
struct weston_subsurface *sub;
struct weston_view *view, *nv;
wl_list_for_each(sub, &surface->subsurface_list, parent_link) {
if (sub->surface == surface)
continue;
wl_list_for_each_safe(view, nv, &sub->unused_views, surface_link) {
weston_view_unmap (view);
weston_view_destroy(view);
}
surface_free_unused_subsurface_views(sub->surface);
}
}
static void
view_list_add_subsurface_view(struct weston_compositor *compositor,
struct weston_subsurface *sub,
struct weston_view *parent)
{
struct weston_subsurface *child;
struct weston_view *view = NULL, *iv;
if (!weston_surface_is_mapped(sub->surface))
return;
wl_list_for_each(iv, &sub->unused_views, surface_link) {
if (iv->geometry.parent == parent) {
view = iv;
break;
}
}
if (view) {
/* Put it back in the surface's list of views */
wl_list_remove(&view->surface_link);
wl_list_insert(&sub->surface->views, &view->surface_link);
} else {
view = weston_view_create(sub->surface);
weston_view_set_position(view,
sub->position.x,
sub->position.y);
weston_view_set_transform_parent(view, parent);
}
view->parent_view = parent;
weston_view_update_transform(view);
view->is_mapped = true;
if (wl_list_empty(&sub->surface->subsurface_list)) {
wl_list_insert(compositor->view_list.prev, &view->link);
return;
}
wl_list_for_each(child, &sub->surface->subsurface_list, parent_link) {
if (child->surface == sub->surface)
wl_list_insert(compositor->view_list.prev, &view->link);
else
view_list_add_subsurface_view(compositor, child, view);
}
}
/* This recursively adds the sub-surfaces for a view, relying on the
* sub-surface order. Thus, if a client restacks the sub-surfaces, that
* change first happens to the sub-surface list, and then automatically
* propagates here. See weston_surface_damage_subsurfaces() for how the
* sub-surfaces receive damage when the client changes the state.
*/
static void
view_list_add(struct weston_compositor *compositor,
struct weston_view *view)
{
struct weston_subsurface *sub;
weston_view_update_transform(view);
if (wl_list_empty(&view->surface->subsurface_list)) {
wl_list_insert(compositor->view_list.prev, &view->link);
return;
}
wl_list_for_each(sub, &view->surface->subsurface_list, parent_link) {
if (sub->surface == view->surface)
wl_list_insert(compositor->view_list.prev, &view->link);
else
view_list_add_subsurface_view(compositor, sub, view);
}
}
static void
weston_compositor_build_view_list(struct weston_compositor *compositor)
{
struct weston_view *view;
struct weston_layer *layer;
wl_list_for_each(layer, &compositor->layer_list, link)
wl_list_for_each(view, &layer->view_list.link, layer_link.link)
surface_stash_subsurface_views(view->surface);
wl_list_init(&compositor->view_list);
wl_list_for_each(layer, &compositor->layer_list, link) {
wl_list_for_each(view, &layer->view_list.link, layer_link.link) {
view_list_add(compositor, view);
}
}
wl_list_for_each(layer, &compositor->layer_list, link)
wl_list_for_each(view, &layer->view_list.link, layer_link.link)
surface_free_unused_subsurface_views(view->surface);
}
static void
weston_output_take_feedback_list(struct weston_output *output,
struct weston_surface *surface)
{
struct weston_view *view;
struct weston_presentation_feedback *feedback;
uint32_t flags = 0xffffffff;
if (wl_list_empty(&surface->feedback_list))
return;
/* All views must have the flag for the flag to survive. */
wl_list_for_each(view, &surface->views, surface_link) {
/* ignore views that are not on this output at all */
if (view->output_mask & (1u << output->id))
flags &= view->psf_flags;
}
wl_list_for_each(feedback, &surface->feedback_list, link)
feedback->psf_flags = flags;
wl_list_insert_list(&output->feedback_list, &surface->feedback_list);
wl_list_init(&surface->feedback_list);
}
static int
weston_output_repaint(struct weston_output *output, void *repaint_data)
{
struct weston_compositor *ec = output->compositor;
struct weston_view *ev;
struct weston_animation *animation, *next;
struct weston_frame_callback *cb, *cnext;
struct wl_list frame_callback_list;
pixman_region32_t output_damage;
int r;
uint32_t frame_time_msec;
if (output->destroying)
return 0;
TL_POINT("core_repaint_begin", TLP_OUTPUT(output), TLP_END);
/* Rebuild the surface list and update surface transforms up front. */
weston_compositor_build_view_list(ec);
if (output->assign_planes && !output->disable_planes) {
output->assign_planes(output, repaint_data);
} else {
wl_list_for_each(ev, &ec->view_list, link) {
weston_view_move_to_plane(ev, &ec->primary_plane);
ev->psf_flags = 0;
}
}
wl_list_init(&frame_callback_list);
wl_list_for_each(ev, &ec->view_list, link) {
/* Note: This operation is safe to do multiple times on the
* same surface.
*/
if (ev->surface->output == output) {
wl_list_insert_list(&frame_callback_list,
&ev->surface->frame_callback_list);
wl_list_init(&ev->surface->frame_callback_list);
weston_output_take_feedback_list(output, ev->surface);
}
}
compositor_accumulate_damage(ec);
pixman_region32_init(&output_damage);
pixman_region32_intersect(&output_damage,
&ec->primary_plane.damage, &output->region);
pixman_region32_subtract(&output_damage,
&output_damage, &ec->primary_plane.clip);
if (output->dirty)
weston_output_update_matrix(output);
r = output->repaint(output, &output_damage, repaint_data);
pixman_region32_fini(&output_damage);
output->repaint_needed = false;
if (r == 0)
output->repaint_status = REPAINT_AWAITING_COMPLETION;
weston_compositor_repick(ec);
frame_time_msec = timespec_to_msec(&output->frame_time);
wl_list_for_each_safe(cb, cnext, &frame_callback_list, link) {
wl_callback_send_done(cb->resource, frame_time_msec);
wl_resource_destroy(cb->resource);
}
wl_list_for_each_safe(animation, next, &output->animation_list, link) {
animation->frame_counter++;
animation->frame(animation, output, &output->frame_time);
}
TL_POINT("core_repaint_posted", TLP_OUTPUT(output), TLP_END);
return r;
}
static void
weston_output_schedule_repaint_reset(struct weston_output *output)
{
output->repaint_status = REPAINT_NOT_SCHEDULED;
TL_POINT("core_repaint_exit_loop", TLP_OUTPUT(output), TLP_END);
}
static int
weston_output_maybe_repaint(struct weston_output *output, struct timespec *now,
void *repaint_data)
{
struct weston_compositor *compositor = output->compositor;
int ret = 0;
int64_t msec_to_repaint;
/* We're not ready yet; come back to make a decision later. */
if (output->repaint_status != REPAINT_SCHEDULED)
return ret;
msec_to_repaint = timespec_sub_to_msec(&output->next_repaint, now);
if (msec_to_repaint > 1)
return ret;
/* If we're sleeping, drop the repaint machinery entirely; we will
* explicitly repaint all outputs when we come back. */
if (compositor->state == WESTON_COMPOSITOR_SLEEPING ||
compositor->state == WESTON_COMPOSITOR_OFFSCREEN)
goto err;
/* We don't actually need to repaint this output; drop it from
* repaint until something causes damage. */
if (!output->repaint_needed)
goto err;
/* If repaint fails, we aren't going to get weston_output_finish_frame
* to trigger a new repaint, so drop it from repaint and hope
* something schedules a successful repaint later. As repainting may
* take some time, re-read our clock as a courtesy to the next
* output. */
ret = weston_output_repaint(output, repaint_data);
weston_compositor_read_presentation_clock(compositor, now);
if (ret != 0)
goto err;
output->repainted = true;
return ret;
err:
weston_output_schedule_repaint_reset(output);
return ret;
}
static void
output_repaint_timer_arm(struct weston_compositor *compositor)
{
struct weston_output *output;
bool any_should_repaint = false;
struct timespec now;
int64_t msec_to_next = INT64_MAX;
weston_compositor_read_presentation_clock(compositor, &now);
wl_list_for_each(output, &compositor->output_list, link) {
int64_t msec_to_this;
if (output->repaint_status != REPAINT_SCHEDULED)
continue;
msec_to_this = timespec_sub_to_msec(&output->next_repaint,
&now);
if (!any_should_repaint || msec_to_this < msec_to_next)
msec_to_next = msec_to_this;
any_should_repaint = true;
}
if (!any_should_repaint)
return;
/* Even if we should repaint immediately, add the minimum 1 ms delay.
* This is a workaround to allow coalescing multiple output repaints
* particularly from weston_output_finish_frame()
* into the same call, which would not happen if we called
* output_repaint_timer_handler() directly.
*/
if (msec_to_next < 1)
msec_to_next = 1;
wl_event_source_timer_update(compositor->repaint_timer, msec_to_next);
}
static int
output_repaint_timer_handler(void *data)
{
struct weston_compositor *compositor = data;
struct weston_output *output;
struct timespec now;
void *repaint_data = NULL;
int ret = 0;
weston_compositor_read_presentation_clock(compositor, &now);
if (compositor->backend->repaint_begin)
repaint_data = compositor->backend->repaint_begin(compositor);
wl_list_for_each(output, &compositor->output_list, link) {
ret = weston_output_maybe_repaint(output, &now, repaint_data);
if (ret)
break;
}
if (ret == 0) {
if (compositor->backend->repaint_flush)
compositor->backend->repaint_flush(compositor,
repaint_data);
} else {
wl_list_for_each(output, &compositor->output_list, link) {
if (output->repainted)
weston_output_schedule_repaint_reset(output);
}
if (compositor->backend->repaint_cancel)
compositor->backend->repaint_cancel(compositor,
repaint_data);
}
wl_list_for_each(output, &compositor->output_list, link)
output->repainted = false;
output_repaint_timer_arm(compositor);
return 0;
}
WL_EXPORT void
weston_output_finish_frame(struct weston_output *output,
const struct timespec *stamp,
uint32_t presented_flags)
{
struct weston_compositor *compositor = output->compositor;
int32_t refresh_nsec;
struct timespec now;
int64_t msec_rel;
assert(output->repaint_status == REPAINT_AWAITING_COMPLETION);
assert(stamp || (presented_flags & WP_PRESENTATION_FEEDBACK_INVALID));
weston_compositor_read_presentation_clock(compositor, &now);
/* If we haven't been supplied any timestamp at all, we don't have a
* timebase to work against, so any delay just wastes time. Push a
* repaint as soon as possible so we can get on with it. */
if (!stamp) {
output->next_repaint = now;
goto out;
}
TL_POINT("core_repaint_finished", TLP_OUTPUT(output),
TLP_VBLANK(stamp), TLP_END);
refresh_nsec = millihz_to_nsec(output->current_mode->refresh);
weston_presentation_feedback_present_list(&output->feedback_list,
output, refresh_nsec, stamp,
output->msc,
presented_flags);
output->frame_time = *stamp;
timespec_add_nsec(&output->next_repaint, stamp, refresh_nsec);
timespec_add_msec(&output->next_repaint, &output->next_repaint,
-compositor->repaint_msec);
msec_rel = timespec_sub_to_msec(&output->next_repaint, &now);
if (msec_rel < -1000 || msec_rel > 1000) {
static bool warned;
if (!warned)
weston_log("Warning: computed repaint delay is "
"insane: %lld msec\n", (long long) msec_rel);
warned = true;
output->next_repaint = now;
}
/* Called from restart_repaint_loop and restart happens already after
* the deadline given by repaint_msec? In that case we delay until
* the deadline of the next frame, to give clients a more predictable
* timing of the repaint cycle to lock on. */
if (presented_flags == WP_PRESENTATION_FEEDBACK_INVALID &&
msec_rel < 0) {
while (timespec_sub_to_nsec(&output->next_repaint, &now) < 0) {
timespec_add_nsec(&output->next_repaint,
&output->next_repaint,
refresh_nsec);
}
}
out:
output->repaint_status = REPAINT_SCHEDULED;
output_repaint_timer_arm(compositor);
}
static void
idle_repaint(void *data)
{
struct weston_output *output = data;
assert(output->repaint_status == REPAINT_BEGIN_FROM_IDLE);
output->repaint_status = REPAINT_AWAITING_COMPLETION;
output->idle_repaint_source = NULL;
output->start_repaint_loop(output);
}
WL_EXPORT void
weston_layer_entry_insert(struct weston_layer_entry *list,
struct weston_layer_entry *entry)
{
wl_list_insert(&list->link, &entry->link);
entry->layer = list->layer;
}
WL_EXPORT void
weston_layer_entry_remove(struct weston_layer_entry *entry)
{
wl_list_remove(&entry->link);
wl_list_init(&entry->link);
entry->layer = NULL;
}
/** Initialize the weston_layer struct.
*
* \param compositor The compositor instance
* \param layer The layer to initialize
*/
WL_EXPORT void
weston_layer_init(struct weston_layer *layer,
struct weston_compositor *compositor)
{
layer->compositor = compositor;
wl_list_init(&layer->link);
wl_list_init(&layer->view_list.link);
layer->view_list.layer = layer;
weston_layer_set_mask_infinite(layer);
}
/** Sets the position of the layer in the layer list. The layer will be placed
* below any layer with the same position value, if any.
* This function is safe to call if the layer is already on the list, but the
* layer may be moved below other layers at the same position, if any.
*
* \param layer The layer to modify
* \param position The position the layer will be placed at
*/
WL_EXPORT void
weston_layer_set_position(struct weston_layer *layer,
enum weston_layer_position position)
{
struct weston_layer *below;
wl_list_remove(&layer->link);
/* layer_list is ordered from top to bottom, the last layer being the
* background with the smallest position value */
layer->position = position;
wl_list_for_each_reverse(below, &layer->compositor->layer_list, link) {
if (below->position >= layer->position) {
wl_list_insert(&below->link, &layer->link);
return;
}
}
wl_list_insert(&layer->compositor->layer_list, &layer->link);
}
/** Hide a layer by taking it off the layer list.
* This function is safe to call if the layer is not on the list.
*
* \param layer The layer to hide
*/
WL_EXPORT void
weston_layer_unset_position(struct weston_layer *layer)
{
wl_list_remove(&layer->link);
wl_list_init(&layer->link);
}
WL_EXPORT void
weston_layer_set_mask(struct weston_layer *layer,
int x, int y, int width, int height)
{
struct weston_view *view;
layer->mask.x1 = x;
layer->mask.x2 = x + width;
layer->mask.y1 = y;
layer->mask.y2 = y + height;
wl_list_for_each(view, &layer->view_list.link, layer_link.link) {
weston_view_geometry_dirty(view);
}
}
WL_EXPORT void
weston_layer_set_mask_infinite(struct weston_layer *layer)
{
weston_layer_set_mask(layer, INT32_MIN, INT32_MIN,
UINT32_MAX, UINT32_MAX);
}
WL_EXPORT bool
weston_layer_mask_is_infinite(struct weston_layer *layer)
{
return layer->mask.x1 == INT32_MIN &&
layer->mask.y1 == INT32_MIN &&
layer->mask.x2 == INT32_MIN + UINT32_MAX &&
layer->mask.y2 == INT32_MIN + UINT32_MAX;
}
WL_EXPORT void
weston_output_schedule_repaint(struct weston_output *output)
{
struct weston_compositor *compositor = output->compositor;
struct wl_event_loop *loop;
if (compositor->state == WESTON_COMPOSITOR_SLEEPING ||
compositor->state == WESTON_COMPOSITOR_OFFSCREEN)
return;
if (!output->repaint_needed)
TL_POINT("core_repaint_req", TLP_OUTPUT(output), TLP_END);
loop = wl_display_get_event_loop(compositor->wl_display);
output->repaint_needed = true;
/* If we already have a repaint scheduled for our idle handler,
* no need to set it again. If the repaint has been called but
* not finished, then weston_output_finish_frame() will notice
* that a repaint is needed and schedule one. */
if (output->repaint_status != REPAINT_NOT_SCHEDULED)
return;
output->repaint_status = REPAINT_BEGIN_FROM_IDLE;
assert(!output->idle_repaint_source);
output->idle_repaint_source = wl_event_loop_add_idle(loop, idle_repaint,
output);
TL_POINT("core_repaint_enter_loop", TLP_OUTPUT(output), TLP_END);
}
WL_EXPORT void
weston_compositor_schedule_repaint(struct weston_compositor *compositor)
{
struct weston_output *output;
wl_list_for_each(output, &compositor->output_list, link)
weston_output_schedule_repaint(output);
}
static void
surface_destroy(struct wl_client *client, struct wl_resource *resource)
{
wl_resource_destroy(resource);
}
static void
surface_attach(struct wl_client *client,
struct wl_resource *resource,
struct wl_resource *buffer_resource, int32_t sx, int32_t sy)
{
struct weston_surface *surface = wl_resource_get_user_data(resource);
struct weston_buffer *buffer = NULL;
if (buffer_resource) {
buffer = weston_buffer_from_resource(buffer_resource);
if (buffer == NULL) {
wl_client_post_no_memory(client);
return;
}
}
/* Attach, attach, without commit in between does not send
* wl_buffer.release. */
weston_surface_state_set_buffer(&surface->pending, buffer);
surface->pending.sx = sx;
surface->pending.sy = sy;
surface->pending.newly_attached = 1;
}
static void
surface_damage(struct wl_client *client,
struct wl_resource *resource,
int32_t x, int32_t y, int32_t width, int32_t height)
{
struct weston_surface *surface = wl_resource_get_user_data(resource);
if (width <= 0 || height <= 0)
return;
pixman_region32_union_rect(&surface->pending.damage_surface,
&surface->pending.damage_surface,
x, y, width, height);
}
static void
surface_damage_buffer(struct wl_client *client,
struct wl_resource *resource,
int32_t x, int32_t y, int32_t width, int32_t height)
{
struct weston_surface *surface = wl_resource_get_user_data(resource);
if (width <= 0 || height <= 0)
return;
pixman_region32_union_rect(&surface->pending.damage_buffer,
&surface->pending.damage_buffer,
x, y, width, height);
}
static void
destroy_frame_callback(struct wl_resource *resource)
{
struct weston_frame_callback *cb = wl_resource_get_user_data(resource);
wl_list_remove(&cb->link);
free(cb);
}
static void
surface_frame(struct wl_client *client,
struct wl_resource *resource, uint32_t callback)
{
struct weston_frame_callback *cb;
struct weston_surface *surface = wl_resource_get_user_data(resource);
cb = malloc(sizeof *cb);
if (cb == NULL) {
wl_resource_post_no_memory(resource);
return;
}
cb->resource = wl_resource_create(client, &wl_callback_interface, 1,
callback);
if (cb->resource == NULL) {
free(cb);
wl_resource_post_no_memory(resource);
return;
}
wl_resource_set_implementation(cb->resource, NULL, cb,
destroy_frame_callback);
wl_list_insert(surface->pending.frame_callback_list.prev, &cb->link);
}
static void
surface_set_opaque_region(struct wl_client *client,
struct wl_resource *resource,
struct wl_resource *region_resource)
{
struct weston_surface *surface = wl_resource_get_user_data(resource);
struct weston_region *region;
if (region_resource) {
region = wl_resource_get_user_data(region_resource);
pixman_region32_copy(&surface->pending.opaque,
&region->region);
} else {
pixman_region32_clear(&surface->pending.opaque);
}
}
static void
surface_set_input_region(struct wl_client *client,
struct wl_resource *resource,
struct wl_resource *region_resource)
{
struct weston_surface *surface = wl_resource_get_user_data(resource);
struct weston_region *region;
if (region_resource) {
region = wl_resource_get_user_data(region_resource);
pixman_region32_copy(&surface->pending.input,
&region->region);
} else {
pixman_region32_fini(&surface->pending.input);
region_init_infinite(&surface->pending.input);
}
}
/* Cause damage to this sub-surface and all its children.
*
* This is useful when there are state changes that need an implicit
* damage, e.g. a z-order change.
*/
static void
weston_surface_damage_subsurfaces(struct weston_subsurface *sub)
{
struct weston_subsurface *child;
weston_surface_damage(sub->surface);
sub->reordered = false;
wl_list_for_each(child, &sub->surface->subsurface_list, parent_link)
if (child != sub)
weston_surface_damage_subsurfaces(child);
}
static void
weston_surface_commit_subsurface_order(struct weston_surface *surface)
{
struct weston_subsurface *sub;
wl_list_for_each_reverse(sub, &surface->subsurface_list_pending,
parent_link_pending) {
wl_list_remove(&sub->parent_link);
wl_list_insert(&surface->subsurface_list, &sub->parent_link);
if (sub->reordered)
weston_surface_damage_subsurfaces(sub);
}
}
static void
weston_surface_build_buffer_matrix(const struct weston_surface *surface,
struct weston_matrix *matrix)
{
const struct weston_buffer_viewport *vp = &surface->buffer_viewport;
double src_width, src_height, dest_width, dest_height;
weston_matrix_init(matrix);
if (vp->buffer.src_width == wl_fixed_from_int(-1)) {
src_width = surface->width_from_buffer;
src_height = surface->height_from_buffer;
} else {
src_width = wl_fixed_to_double(vp->buffer.src_width);
src_height = wl_fixed_to_double(vp->buffer.src_height);
}
if (vp->surface.width == -1) {
dest_width = src_width;
dest_height = src_height;
} else {
dest_width = vp->surface.width;
dest_height = vp->surface.height;
}
if (src_width != dest_width || src_height != dest_height)
weston_matrix_scale(matrix,
src_width / dest_width,
src_height / dest_height, 1);
if (vp->buffer.src_width != wl_fixed_from_int(-1))
weston_matrix_translate(matrix,
wl_fixed_to_double(vp->buffer.src_x),
wl_fixed_to_double(vp->buffer.src_y),
0);
switch (vp->buffer.transform) {
case WL_OUTPUT_TRANSFORM_FLIPPED:
case WL_OUTPUT_TRANSFORM_FLIPPED_90:
case WL_OUTPUT_TRANSFORM_FLIPPED_180:
case WL_OUTPUT_TRANSFORM_FLIPPED_270:
weston_matrix_scale(matrix, -1, 1, 1);
weston_matrix_translate(matrix,
surface->width_from_buffer, 0, 0);
break;
}
switch (vp->buffer.transform) {
default:
case WL_OUTPUT_TRANSFORM_NORMAL:
case WL_OUTPUT_TRANSFORM_FLIPPED:
break;
case WL_OUTPUT_TRANSFORM_90:
case WL_OUTPUT_TRANSFORM_FLIPPED_90:
weston_matrix_rotate_xy(matrix, 0, 1);
weston_matrix_translate(matrix,
surface->height_from_buffer, 0, 0);
break;
case WL_OUTPUT_TRANSFORM_180:
case WL_OUTPUT_TRANSFORM_FLIPPED_180:
weston_matrix_rotate_xy(matrix, -1, 0);
weston_matrix_translate(matrix,
surface->width_from_buffer,
surface->height_from_buffer, 0);
break;
case WL_OUTPUT_TRANSFORM_270:
case WL_OUTPUT_TRANSFORM_FLIPPED_270:
weston_matrix_rotate_xy(matrix, 0, -1);
weston_matrix_translate(matrix,
0, surface->width_from_buffer, 0);
break;
}
weston_matrix_scale(matrix, vp->buffer.scale, vp->buffer.scale, 1);
}
/**
* Compute a + b > c while being safe to overflows.
*/
static bool
fixed_sum_gt(wl_fixed_t a, wl_fixed_t b, wl_fixed_t c)
{
return (int64_t)a + (int64_t)b > (int64_t)c;
}
static bool
weston_surface_is_pending_viewport_source_valid(
const struct weston_surface *surface)
{
const struct weston_surface_state *pend = &surface->pending;
const struct weston_buffer_viewport *vp = &pend->buffer_viewport;
int width_from_buffer = 0;
int height_from_buffer = 0;
wl_fixed_t w;
wl_fixed_t h;
/* If viewport source rect is not set, it is always ok. */
if (vp->buffer.src_width == wl_fixed_from_int(-1))
return true;
if (pend->newly_attached) {
if (pend->buffer) {
convert_size_by_transform_scale(&width_from_buffer,
&height_from_buffer,
pend->buffer->width,
pend->buffer->height,
vp->buffer.transform,
vp->buffer.scale);
} else {
/* No buffer: viewport is irrelevant. */
return true;
}
} else {
width_from_buffer = surface->width_from_buffer;
height_from_buffer = surface->height_from_buffer;
}
assert((width_from_buffer == 0) == (height_from_buffer == 0));
assert(width_from_buffer >= 0 && height_from_buffer >= 0);
/* No buffer: viewport is irrelevant. */
if (width_from_buffer == 0 || height_from_buffer == 0)
return true;
/* overflow checks for wl_fixed_from_int() */
if (width_from_buffer > wl_fixed_to_int(INT32_MAX))
return false;
if (height_from_buffer > wl_fixed_to_int(INT32_MAX))
return false;
w = wl_fixed_from_int(width_from_buffer);
h = wl_fixed_from_int(height_from_buffer);
if (fixed_sum_gt(vp->buffer.src_x, vp->buffer.src_width, w))
return false;
if (fixed_sum_gt(vp->buffer.src_y, vp->buffer.src_height, h))
return false;
return true;
}
static bool
fixed_is_integer(wl_fixed_t v)
{
return (v & 0xff) == 0;
}
static bool
weston_surface_is_pending_viewport_dst_size_int(
const struct weston_surface *surface)
{
const struct weston_buffer_viewport *vp =
&surface->pending.buffer_viewport;
if (vp->surface.width != -1) {
assert(vp->surface.width > 0 && vp->surface.height > 0);
return true;
}
return fixed_is_integer(vp->buffer.src_width) &&
fixed_is_integer(vp->buffer.src_height);
}
/* Translate pending damage in buffer co-ordinates to surface
* co-ordinates and union it with a pixman_region32_t.
* This should only be called after the buffer is attached.
*/
static void
apply_damage_buffer(pixman_region32_t *dest,
struct weston_surface *surface,
struct weston_surface_state *state)
{
struct weston_buffer *buffer = surface->buffer_ref.buffer;
/* wl_surface.damage_buffer needs to be clipped to the buffer,
* translated into surface co-ordinates and unioned with
* any other surface damage.
* None of this makes sense if there is no buffer though.
*/
if (buffer && pixman_region32_not_empty(&state->damage_buffer)) {
pixman_region32_t buffer_damage;
pixman_region32_intersect_rect(&state->damage_buffer,
&state->damage_buffer,
0, 0, buffer->width,
buffer->height);
pixman_region32_init(&buffer_damage);
weston_matrix_transform_region(&buffer_damage,
&surface->buffer_to_surface_matrix,
&state->damage_buffer);
pixman_region32_union(dest, dest, &buffer_damage);
pixman_region32_fini(&buffer_damage);
}
/* We should clear this on commit even if there was no buffer */
pixman_region32_clear(&state->damage_buffer);
}
static void
weston_surface_commit_state(struct weston_surface *surface,
struct weston_surface_state *state)
{
struct weston_view *view;
pixman_region32_t opaque;
/* wl_surface.set_buffer_transform */
/* wl_surface.set_buffer_scale */
/* wp_viewport.set_source */
/* wp_viewport.set_destination */
surface->buffer_viewport = state->buffer_viewport;
/* wl_surface.attach */
if (state->newly_attached) {
/* zwp_surface_synchronization_v1.set_acquire_fence */
fd_move(&surface->acquire_fence_fd,
&state->acquire_fence_fd);
/* zwp_surface_synchronization_v1.get_release */
weston_buffer_release_move(&surface->buffer_release_ref,
&state->buffer_release_ref);
weston_surface_attach(surface, state->buffer);
}
weston_surface_state_set_buffer(state, NULL);
assert(state->acquire_fence_fd == -1);
assert(state->buffer_release_ref.buffer_release == NULL);
weston_surface_build_buffer_matrix(surface,
&surface->surface_to_buffer_matrix);
weston_matrix_invert(&surface->buffer_to_surface_matrix,
&surface->surface_to_buffer_matrix);
if (state->newly_attached || state->buffer_viewport.changed) {
weston_surface_update_size(surface);
if (surface->committed)
surface->committed(surface, state->sx, state->sy);
}
state->sx = 0;
state->sy = 0;
state->newly_attached = 0;
state->buffer_viewport.changed = 0;
/* wl_surface.damage and wl_surface.damage_buffer */
if (weston_timeline_enabled_ &&
(pixman_region32_not_empty(&state->damage_surface) ||
pixman_region32_not_empty(&state->damage_buffer)))
TL_POINT("core_commit_damage", TLP_SURFACE(surface), TLP_END);
pixman_region32_union(&surface->damage, &surface->damage,
&state->damage_surface);
apply_damage_buffer(&surface->damage, surface, state);
pixman_region32_intersect_rect(&surface->damage, &surface->damage,
0, 0, surface->width, surface->height);
pixman_region32_clear(&state->damage_surface);
/* wl_surface.set_opaque_region */
pixman_region32_init(&opaque);
pixman_region32_intersect_rect(&opaque, &state->opaque,
0, 0, surface->width, surface->height);
if (!pixman_region32_equal(&opaque, &surface->opaque)) {
pixman_region32_copy(&surface->opaque, &opaque);
wl_list_for_each(view, &surface->views, surface_link)
weston_view_geometry_dirty(view);
}
pixman_region32_fini(&opaque);
/* wl_surface.set_input_region */
pixman_region32_intersect_rect(&surface->input, &state->input,
0, 0, surface->width, surface->height);
/* wl_surface.frame */
wl_list_insert_list(&surface->frame_callback_list,
&state->frame_callback_list);
wl_list_init(&state->frame_callback_list);
/* XXX:
* What should happen with a feedback request, if there
* is no wl_buffer attached for this commit?
*/
/* presentation.feedback */
wl_list_insert_list(&surface->feedback_list,
&state->feedback_list);
wl_list_init(&state->feedback_list);
wl_signal_emit(&surface->commit_signal, surface);
}
static void
weston_surface_commit(struct weston_surface *surface)
{
weston_surface_commit_state(surface, &surface->pending);
weston_surface_commit_subsurface_order(surface);
weston_surface_schedule_repaint(surface);
}
static void
weston_subsurface_commit(struct weston_subsurface *sub);
static void
weston_subsurface_parent_commit(struct weston_subsurface *sub,
int parent_is_synchronized);
static void
surface_commit(struct wl_client *client, struct wl_resource *resource)
{
struct weston_surface *surface = wl_resource_get_user_data(resource);
struct weston_subsurface *sub = weston_surface_to_subsurface(surface);
if (!weston_surface_is_pending_viewport_source_valid(surface)) {
assert(surface->viewport_resource);
wl_resource_post_error(surface->viewport_resource,
WP_VIEWPORT_ERROR_OUT_OF_BUFFER,
"wl_surface@%d has viewport source outside buffer",
wl_resource_get_id(resource));
return;
}
if (!weston_surface_is_pending_viewport_dst_size_int(surface)) {
assert(surface->viewport_resource);
wl_resource_post_error(surface->viewport_resource,
WP_VIEWPORT_ERROR_BAD_SIZE,
"wl_surface@%d viewport dst size not integer",
wl_resource_get_id(resource));
return;
}
if (surface->pending.acquire_fence_fd >= 0) {
assert(surface->synchronization_resource);
if (!surface->pending.buffer) {
fd_clear(&surface->pending.acquire_fence_fd);
wl_resource_post_error(surface->synchronization_resource,
ZWP_LINUX_SURFACE_SYNCHRONIZATION_V1_ERROR_NO_BUFFER,
"wl_surface@%"PRIu32" no buffer for synchronization",
wl_resource_get_id(resource));
return;
}
/* We support fences for both wp_linux_dmabuf and opaque EGL
* buffers, as mandated by minor version 2 of the
* zwp_linux_explicit_synchronization_v1 protocol. Since
* renderers that support fences currently only support these
* two buffer types plus SHM buffers, we can just check for the
* SHM buffer case here.
*/
if (wl_shm_buffer_get(surface->pending.buffer->resource)) {
fd_clear(&surface->pending.acquire_fence_fd);
wl_resource_post_error(surface->synchronization_resource,
ZWP_LINUX_SURFACE_SYNCHRONIZATION_V1_ERROR_UNSUPPORTED_BUFFER,
"wl_surface@%"PRIu32" unsupported buffer for synchronization",
wl_resource_get_id(resource));
return;
}
}
if (surface->pending.buffer_release_ref.buffer_release &&
!surface->pending.buffer) {
assert(surface->synchronization_resource);
wl_resource_post_error(surface->synchronization_resource,
ZWP_LINUX_SURFACE_SYNCHRONIZATION_V1_ERROR_NO_BUFFER,
"wl_surface@%"PRIu32" no buffer for synchronization",
wl_resource_get_id(resource));
return;
}
if (sub) {
weston_subsurface_commit(sub);
return;
}
weston_surface_commit(surface);
wl_list_for_each(sub, &surface->subsurface_list, parent_link) {
if (sub->surface != surface)
weston_subsurface_parent_commit(sub, 0);
}
}
static void
surface_set_buffer_transform(struct wl_client *client,
struct wl_resource *resource, int transform)
{
struct weston_surface *surface = wl_resource_get_user_data(resource);
/* if wl_output.transform grows more members this will need to be updated. */
if (transform < 0 ||
transform > WL_OUTPUT_TRANSFORM_FLIPPED_270) {
wl_resource_post_error(resource,
WL_SURFACE_ERROR_INVALID_TRANSFORM,
"buffer transform must be a valid transform "
"('%d' specified)", transform);
return;
}
surface->pending.buffer_viewport.buffer.transform = transform;
surface->pending.buffer_viewport.changed = 1;
}
static void
surface_set_buffer_scale(struct wl_client *client,
struct wl_resource *resource,
int32_t scale)
{
struct weston_surface *surface = wl_resource_get_user_data(resource);
if (scale < 1) {
wl_resource_post_error(resource,
WL_SURFACE_ERROR_INVALID_SCALE,
"buffer scale must be at least one "
"('%d' specified)", scale);
return;
}
surface->pending.buffer_viewport.buffer.scale = scale;
surface->pending.buffer_viewport.changed = 1;
}
static const struct wl_surface_interface surface_interface = {
surface_destroy,
surface_attach,
surface_damage,
surface_frame,
surface_set_opaque_region,
surface_set_input_region,
surface_commit,
surface_set_buffer_transform,
surface_set_buffer_scale,
surface_damage_buffer
};
static void
compositor_create_surface(struct wl_client *client,
struct wl_resource *resource, uint32_t id)
{
struct weston_compositor *ec = wl_resource_get_user_data(resource);
struct weston_surface *surface;
surface = weston_surface_create(ec);
if (surface == NULL) {
wl_resource_post_no_memory(resource);
return;
}
surface->resource =
wl_resource_create(client, &wl_surface_interface,
wl_resource_get_version(resource), id);
if (surface->resource == NULL) {
weston_surface_destroy(surface);
wl_resource_post_no_memory(resource);
return;
}
wl_resource_set_implementation(surface->resource, &surface_interface,
surface, destroy_surface);
wl_signal_emit(&ec->create_surface_signal, surface);
}
static void
destroy_region(struct wl_resource *resource)
{
struct weston_region *region = wl_resource_get_user_data(resource);
pixman_region32_fini(&region->region);
free(region);
}
static void
region_destroy(struct wl_client *client, struct wl_resource *resource)
{
wl_resource_destroy(resource);
}
static void
region_add(struct wl_client *client, struct wl_resource *resource,
int32_t x, int32_t y, int32_t width, int32_t height)
{
struct weston_region *region = wl_resource_get_user_data(resource);
pixman_region32_union_rect(&region->region, &region->region,
x, y, width, height);
}
static void
region_subtract(struct wl_client *client, struct wl_resource *resource,
int32_t x, int32_t y, int32_t width, int32_t height)
{
struct weston_region *region = wl_resource_get_user_data(resource);
pixman_region32_t rect;
pixman_region32_init_rect(&rect, x, y, width, height);
pixman_region32_subtract(&region->region, &region->region, &rect);
pixman_region32_fini(&rect);
}
static const struct wl_region_interface region_interface = {
region_destroy,
region_add,
region_subtract
};
static void
compositor_create_region(struct wl_client *client,
struct wl_resource *resource, uint32_t id)
{
struct weston_region *region;
region = malloc(sizeof *region);
if (region == NULL) {
wl_resource_post_no_memory(resource);
return;
}
pixman_region32_init(&region->region);
region->resource =
wl_resource_create(client, &wl_region_interface, 1, id);
if (region->resource == NULL) {
free(region);
wl_resource_post_no_memory(resource);
return;
}
wl_resource_set_implementation(region->resource, &region_interface,
region, destroy_region);
}
static const struct wl_compositor_interface compositor_interface = {
compositor_create_surface,
compositor_create_region
};
static void
weston_subsurface_commit_from_cache(struct weston_subsurface *sub)
{
struct weston_surface *surface = sub->surface;
weston_surface_commit_state(surface, &sub->cached);
weston_buffer_reference(&sub->cached_buffer_ref, NULL);
weston_surface_commit_subsurface_order(surface);
weston_surface_schedule_repaint(surface);
sub->has_cached_data = 0;
}
static void
weston_subsurface_commit_to_cache(struct weston_subsurface *sub)
{
struct weston_surface *surface = sub->surface;
/*
* If this commit would cause the surface to move by the
* attach(dx, dy) parameters, the old damage region must be
* translated to correspond to the new surface coordinate system
* origin.
*/
pixman_region32_translate(&sub->cached.damage_surface,
-surface->pending.sx, -surface->pending.sy);
pixman_region32_union(&sub->cached.damage_surface,
&sub->cached.damage_surface,
&surface->pending.damage_surface);
pixman_region32_clear(&surface->pending.damage_surface);
if (surface->pending.newly_attached) {
sub->cached.newly_attached = 1;
weston_surface_state_set_buffer(&sub->cached,
surface->pending.buffer);
weston_buffer_reference(&sub->cached_buffer_ref,
surface->pending.buffer);
weston_presentation_feedback_discard_list(
&sub->cached.feedback_list);
/* zwp_surface_synchronization_v1.set_acquire_fence */
fd_move(&sub->cached.acquire_fence_fd,
&surface->pending.acquire_fence_fd);
/* zwp_surface_synchronization_v1.get_release */
weston_buffer_release_move(&sub->cached.buffer_release_ref,
&surface->pending.buffer_release_ref);
}
assert(surface->pending.acquire_fence_fd == -1);
assert(surface->pending.buffer_release_ref.buffer_release == NULL);
sub->cached.sx += surface->pending.sx;
sub->cached.sy += surface->pending.sy;
apply_damage_buffer(&sub->cached.damage_surface, surface, &surface->pending);
sub->cached.buffer_viewport.changed |=
surface->pending.buffer_viewport.changed;
sub->cached.buffer_viewport.buffer =
surface->pending.buffer_viewport.buffer;
sub->cached.buffer_viewport.surface =
surface->pending.buffer_viewport.surface;
weston_surface_reset_pending_buffer(surface);
pixman_region32_copy(&sub->cached.opaque, &surface->pending.opaque);
pixman_region32_copy(&sub->cached.input, &surface->pending.input);
wl_list_insert_list(&sub->cached.frame_callback_list,
&surface->pending.frame_callback_list);
wl_list_init(&surface->pending.frame_callback_list);
wl_list_insert_list(&sub->cached.feedback_list,
&surface->pending.feedback_list);
wl_list_init(&surface->pending.feedback_list);
sub->has_cached_data = 1;
}
static bool
weston_subsurface_is_synchronized(struct weston_subsurface *sub)
{
while (sub) {
if (sub->synchronized)
return true;
if (!sub->parent)
return false;
sub = weston_surface_to_subsurface(sub->parent);
}
return false;
}
static void
weston_subsurface_commit(struct weston_subsurface *sub)
{
struct weston_surface *surface = sub->surface;
struct weston_subsurface *tmp;
/* Recursive check for effectively synchronized. */
if (weston_subsurface_is_synchronized(sub)) {
weston_subsurface_commit_to_cache(sub);
} else {
if (sub->has_cached_data) {
/* flush accumulated state from cache */
weston_subsurface_commit_to_cache(sub);
weston_subsurface_commit_from_cache(sub);
} else {
weston_surface_commit(surface);
}
wl_list_for_each(tmp, &surface->subsurface_list, parent_link) {
if (tmp->surface != surface)
weston_subsurface_parent_commit(tmp, 0);
}
}
}
static void
weston_subsurface_synchronized_commit(struct weston_subsurface *sub)
{
struct weston_surface *surface = sub->surface;
struct weston_subsurface *tmp;
/* From now on, commit_from_cache the whole sub-tree, regardless of
* the synchronized mode of each child. This sub-surface or some
* of its ancestors were synchronized, so we are synchronized
* all the way down.
*/
if (sub->has_cached_data)
weston_subsurface_commit_from_cache(sub);
wl_list_for_each(tmp, &surface->subsurface_list, parent_link) {
if (tmp->surface != surface)
weston_subsurface_parent_commit(tmp, 1);
}
}
static void
weston_subsurface_parent_commit(struct weston_subsurface *sub,
int parent_is_synchronized)
{
struct weston_view *view;
if (sub->position.set) {
wl_list_for_each(view, &sub->surface->views, surface_link)
weston_view_set_position(view,
sub->position.x,
sub->position.y);
sub->position.set = 0;
}
if (parent_is_synchronized || sub->synchronized)
weston_subsurface_synchronized_commit(sub);
}
static int
subsurface_get_label(struct weston_surface *surface, char *buf, size_t len)
{
return snprintf(buf, len, "sub-surface");
}
static void
subsurface_committed(struct weston_surface *surface, int32_t dx, int32_t dy)
{
struct weston_view *view;
wl_list_for_each(view, &surface->views, surface_link)
weston_view_set_position(view,
view->geometry.x + dx,
view->geometry.y + dy);
/* No need to check parent mappedness, because if parent is not
* mapped, parent is not in a visible layer, so this sub-surface
* will not be drawn either.
*/
if (!weston_surface_is_mapped(surface)) {
surface->is_mapped = true;
/* Cannot call weston_view_update_transform(),
* because that would call it also for the parent surface,
* which might not be mapped yet. That would lead to
* inconsistent state, where the window could never be
* mapped.
*
* Instead just force the is_mapped flag on, to make
* weston_surface_is_mapped() return true, so that when the
* parent surface does get mapped, this one will get
* included, too. See view_list_add().
*/
}
}
static struct weston_subsurface *
weston_surface_to_subsurface(struct weston_surface *surface)
{
if (surface->committed == subsurface_committed)
return surface->committed_private;
return NULL;
}
WL_EXPORT struct weston_surface *
weston_surface_get_main_surface(struct weston_surface *surface)
{
struct weston_subsurface *sub;
while (surface && (sub = weston_surface_to_subsurface(surface)))
surface = sub->parent;
return surface;
}
WL_EXPORT int
weston_surface_set_role(struct weston_surface *surface,
const char *role_name,
struct wl_resource *error_resource,
uint32_t error_code)
{
assert(role_name);
if (surface->role_name == NULL ||
surface->role_name == role_name ||
strcmp(surface->role_name, role_name) == 0) {
surface->role_name = role_name;
return 0;
}
wl_resource_post_error(error_resource, error_code,
"Cannot assign role %s to wl_surface@%d,"
" already has role %s\n",
role_name,
wl_resource_get_id(surface->resource),
surface->role_name);
return -1;
}
WL_EXPORT const char *
weston_surface_get_role(struct weston_surface *surface)
{
return surface->role_name;
}
WL_EXPORT void
weston_surface_set_label_func(struct weston_surface *surface,
int (*desc)(struct weston_surface *,
char *, size_t))
{
surface->get_label = desc;
surface->timeline.force_refresh = 1;
}
/** Get the size of surface contents
*
* \param surface The surface to query.
* \param width Returns the width of raw contents.
* \param height Returns the height of raw contents.
*
* Retrieves the raw surface content size in pixels for the given surface.
* This is the whole content size in buffer pixels. If the surface
* has no content or the renderer does not implement this feature,
* zeroes are returned.
*
* This function is used to determine the buffer size needed for
* a weston_surface_copy_content() call.
*/
WL_EXPORT void
weston_surface_get_content_size(struct weston_surface *surface,
int *width, int *height)
{
struct weston_renderer *rer = surface->compositor->renderer;
if (!rer->surface_get_content_size) {
*width = 0;
*height = 0;
return;
}
rer->surface_get_content_size(surface, width, height);
}
/** Get the bounding box of a surface and its subsurfaces
*
* \param surface The surface to query.
* \return The bounding box relative to the surface origin.
*
*/
WL_EXPORT struct weston_geometry
weston_surface_get_bounding_box(struct weston_surface *surface)
{
pixman_region32_t region;
pixman_box32_t *box;
struct weston_subsurface *subsurface;
pixman_region32_init_rect(&region,
0, 0,
surface->width, surface->height);
wl_list_for_each(subsurface, &surface->subsurface_list, parent_link)
pixman_region32_union_rect(&region, &region,
subsurface->position.x,
subsurface->position.y,
subsurface->surface->width,
subsurface->surface->height);
box = pixman_region32_extents(&region);
struct weston_geometry geometry = {
.x = box->x1,
.y = box->y1,
.width = box->x2 - box->x1,
.height = box->y2 - box->y1,
};
pixman_region32_fini(&region);
return geometry;
}
/** Copy surface contents to system memory.
*
* \param surface The surface to copy from.
* \param target Pointer to the target memory buffer.
* \param size Size of the target buffer in bytes.
* \param src_x X location on contents to copy from.
* \param src_y Y location on contents to copy from.
* \param width Width in pixels of the area to copy.
* \param height Height in pixels of the area to copy.
* \return 0 for success, -1 for failure.
*
* Surface contents are maintained by the renderer. They can be in a
* reserved weston_buffer or as a copy, e.g. a GL texture, or something
* else.
*
* Surface contents are copied into memory pointed to by target,
* which has size bytes of space available. The target memory
* may be larger than needed, but being smaller returns an error.
* The extra bytes in target may or may not be written; their content is
* unspecified. Size must be large enough to hold the image.
*
* The image in the target memory will be arranged in rows from
* top to bottom, and pixels on a row from left to right. The pixel
* format is PIXMAN_a8b8g8r8, 4 bytes per pixel, and stride is exactly
* width * 4.
*
* Parameters src_x and src_y define the upper-left corner in buffer
* coordinates (pixels) to copy from. Parameters width and height
* define the size of the area to copy in pixels.
*
* The rectangle defined by src_x, src_y, width, height must fit in
* the surface contents. Otherwise an error is returned.
*
* Use weston_surface_get_content_size to determine the content size; the
* needed target buffer size and rectangle limits.
*
* CURRENT IMPLEMENTATION RESTRICTIONS:
* - the machine must be little-endian due to Pixman formats.
*
* NOTE: Pixman formats are premultiplied.
*/
WL_EXPORT int
weston_surface_copy_content(struct weston_surface *surface,
void *target, size_t size,
int src_x, int src_y,
int width, int height)
{
struct weston_renderer *rer = surface->compositor->renderer;
int cw, ch;
const size_t bytespp = 4; /* PIXMAN_a8b8g8r8 */
if (!rer->surface_copy_content)
return -1;
weston_surface_get_content_size(surface, &cw, &ch);
if (src_x < 0 || src_y < 0)
return -1;
if (width <= 0 || height <= 0)
return -1;
if (src_x + width > cw || src_y + height > ch)
return -1;
if (width * bytespp * height > size)
return -1;
return rer->surface_copy_content(surface, target, size,
src_x, src_y, width, height);
}
static void
subsurface_set_position(struct wl_client *client,
struct wl_resource *resource, int32_t x, int32_t y)
{
struct weston_subsurface *sub = wl_resource_get_user_data(resource);
if (!sub)
return;
sub->position.x = x;
sub->position.y = y;
sub->position.set = 1;
}
static struct weston_subsurface *
subsurface_find_sibling(struct weston_subsurface *sub,
struct weston_surface *surface)
{
struct weston_surface *parent = sub->parent;
struct weston_subsurface *sibling;
wl_list_for_each(sibling, &parent->subsurface_list, parent_link) {
if (sibling->surface == surface && sibling != sub)
return sibling;
}
return NULL;
}
static struct weston_subsurface *
subsurface_sibling_check(struct weston_subsurface *sub,
struct weston_surface *surface,
const char *request)
{
struct weston_subsurface *sibling;
sibling = subsurface_find_sibling(sub, surface);
if (!sibling) {
wl_resource_post_error(sub->resource,
WL_SUBSURFACE_ERROR_BAD_SURFACE,
"%s: wl_surface@%d is not a parent or sibling",
request, wl_resource_get_id(surface->resource));
return NULL;
}
assert(sibling->parent == sub->parent);
return sibling;
}
static void
subsurface_place_above(struct wl_client *client,
struct wl_resource *resource,
struct wl_resource *sibling_resource)
{
struct weston_subsurface *sub = wl_resource_get_user_data(resource);
struct weston_surface *surface =
wl_resource_get_user_data(sibling_resource);
struct weston_subsurface *sibling;
if (!sub)
return;
sibling = subsurface_sibling_check(sub, surface, "place_above");
if (!sibling)
return;
wl_list_remove(&sub->parent_link_pending);
wl_list_insert(sibling->parent_link_pending.prev,
&sub->parent_link_pending);
sub->reordered = true;
}
static void
subsurface_place_below(struct wl_client *client,
struct wl_resource *resource,
struct wl_resource *sibling_resource)
{
struct weston_subsurface *sub = wl_resource_get_user_data(resource);
struct weston_surface *surface =
wl_resource_get_user_data(sibling_resource);
struct weston_subsurface *sibling;
if (!sub)
return;
sibling = subsurface_sibling_check(sub, surface, "place_below");
if (!sibling)
return;
wl_list_remove(&sub->parent_link_pending);
wl_list_insert(&sibling->parent_link_pending,
&sub->parent_link_pending);
sub->reordered = true;
}
static void
subsurface_set_sync(struct wl_client *client, struct wl_resource *resource)
{
struct weston_subsurface *sub = wl_resource_get_user_data(resource);
if (sub)
sub->synchronized = 1;
}
static void
subsurface_set_desync(struct wl_client *client, struct wl_resource *resource)
{
struct weston_subsurface *sub = wl_resource_get_user_data(resource);
if (sub && sub->synchronized) {
sub->synchronized = 0;
/* If sub became effectively desynchronized, flush. */
if (!weston_subsurface_is_synchronized(sub))
weston_subsurface_synchronized_commit(sub);
}
}
static void
weston_subsurface_unlink_parent(struct weston_subsurface *sub)
{
wl_list_remove(&sub->parent_link);
wl_list_remove(&sub->parent_link_pending);
wl_list_remove(&sub->parent_destroy_listener.link);
sub->parent = NULL;
}
static void
weston_subsurface_destroy(struct weston_subsurface *sub);
static void
subsurface_handle_surface_destroy(struct wl_listener *listener, void *data)
{
struct weston_subsurface *sub =
container_of(listener, struct weston_subsurface,
surface_destroy_listener);
assert(data == sub->surface);
/* The protocol object (wl_resource) is left inert. */
if (sub->resource)
wl_resource_set_user_data(sub->resource, NULL);
weston_subsurface_destroy(sub);
}
static void
subsurface_handle_parent_destroy(struct wl_listener *listener, void *data)
{
struct weston_subsurface *sub =
container_of(listener, struct weston_subsurface,
parent_destroy_listener);
assert(data == sub->parent);
assert(sub->surface != sub->parent);
if (weston_surface_is_mapped(sub->surface))
weston_surface_unmap(sub->surface);
weston_subsurface_unlink_parent(sub);
}
static void
subsurface_resource_destroy(struct wl_resource *resource)
{
struct weston_subsurface *sub = wl_resource_get_user_data(resource);
if (sub)
weston_subsurface_destroy(sub);
}
static void
subsurface_destroy(struct wl_client *client, struct wl_resource *resource)
{
wl_resource_destroy(resource);
}
static void
weston_subsurface_link_parent(struct weston_subsurface *sub,
struct weston_surface *parent)
{
sub->parent = parent;
sub->parent_destroy_listener.notify = subsurface_handle_parent_destroy;
wl_signal_add(&parent->destroy_signal,
&sub->parent_destroy_listener);
wl_list_insert(&parent->subsurface_list, &sub->parent_link);
wl_list_insert(&parent->subsurface_list_pending,
&sub->parent_link_pending);
}
static void
weston_subsurface_link_surface(struct weston_subsurface *sub,
struct weston_surface *surface)
{
sub->surface = surface;
sub->surface_destroy_listener.notify =
subsurface_handle_surface_destroy;
wl_signal_add(&surface->destroy_signal,
&sub->surface_destroy_listener);
}
static void
weston_subsurface_destroy(struct weston_subsurface *sub)
{
struct weston_view *view, *next;
assert(sub->surface);
if (sub->resource) {
assert(weston_surface_to_subsurface(sub->surface) == sub);
assert(sub->parent_destroy_listener.notify ==
subsurface_handle_parent_destroy);
wl_list_for_each_safe(view, next, &sub->surface->views, surface_link) {
weston_view_unmap(view);
weston_view_destroy(view);
}
if (sub->parent)
weston_subsurface_unlink_parent(sub);
weston_surface_state_fini(&sub->cached);
weston_buffer_reference(&sub->cached_buffer_ref, NULL);
sub->surface->committed = NULL;
sub->surface->committed_private = NULL;
weston_surface_set_label_func(sub->surface, NULL);
} else {
/* the dummy weston_subsurface for the parent itself */
assert(sub->parent_destroy_listener.notify == NULL);
wl_list_remove(&sub->parent_link);
wl_list_remove(&sub->parent_link_pending);
}
wl_list_remove(&sub->surface_destroy_listener.link);
free(sub);
}
static const struct wl_subsurface_interface subsurface_implementation = {
subsurface_destroy,
subsurface_set_position,
subsurface_place_above,
subsurface_place_below,
subsurface_set_sync,
subsurface_set_desync
};
static struct weston_subsurface *
weston_subsurface_create(uint32_t id, struct weston_surface *surface,
struct weston_surface *parent)
{
struct weston_subsurface *sub;
struct wl_client *client = wl_resource_get_client(surface->resource);
sub = zalloc(sizeof *sub);
if (sub == NULL)
return NULL;
wl_list_init(&sub->unused_views);
sub->resource =
wl_resource_create(client, &wl_subsurface_interface, 1, id);
if (!sub->resource) {
free(sub);
return NULL;
}
wl_resource_set_implementation(sub->resource,
&subsurface_implementation,
sub, subsurface_resource_destroy);
weston_subsurface_link_surface(sub, surface);
weston_subsurface_link_parent(sub, parent);
weston_surface_state_init(&sub->cached);
sub->cached_buffer_ref.buffer = NULL;
sub->synchronized = 1;
return sub;
}
/* Create a dummy subsurface for having the parent itself in its
* sub-surface lists. Makes stacking order manipulation easy.
*/
static struct weston_subsurface *
weston_subsurface_create_for_parent(struct weston_surface *parent)
{
struct weston_subsurface *sub;
sub = zalloc(sizeof *sub);
if (sub == NULL)
return NULL;
weston_subsurface_link_surface(sub, parent);
sub->parent = parent;
wl_list_insert(&parent->subsurface_list, &sub->parent_link);
wl_list_insert(&parent->subsurface_list_pending,
&sub->parent_link_pending);
return sub;
}
static void
subcompositor_get_subsurface(struct wl_client *client,
struct wl_resource *resource,
uint32_t id,
struct wl_resource *surface_resource,
struct wl_resource *parent_resource)
{
struct weston_surface *surface =
wl_resource_get_user_data(surface_resource);
struct weston_surface *parent =
wl_resource_get_user_data(parent_resource);
struct weston_subsurface *sub;
static const char where[] = "get_subsurface: wl_subsurface@";
if (surface == parent) {
wl_resource_post_error(resource,
WL_SUBCOMPOSITOR_ERROR_BAD_SURFACE,
"%s%d: wl_surface@%d cannot be its own parent",
where, id, wl_resource_get_id(surface_resource));
return;
}
if (weston_surface_to_subsurface(surface)) {
wl_resource_post_error(resource,
WL_SUBCOMPOSITOR_ERROR_BAD_SURFACE,
"%s%d: wl_surface@%d is already a sub-surface",
where, id, wl_resource_get_id(surface_resource));
return;
}
if (weston_surface_set_role(surface, "wl_subsurface", resource,
WL_SUBCOMPOSITOR_ERROR_BAD_SURFACE) < 0)
return;
if (weston_surface_get_main_surface(parent) == surface) {
wl_resource_post_error(resource,
WL_SUBCOMPOSITOR_ERROR_BAD_SURFACE,
"%s%d: wl_surface@%d is an ancestor of parent",
where, id, wl_resource_get_id(surface_resource));
return;
}
/* make sure the parent is in its own list */
if (wl_list_empty(&parent->subsurface_list)) {
if (!weston_subsurface_create_for_parent(parent)) {
wl_resource_post_no_memory(resource);
return;
}
}
sub = weston_subsurface_create(id, surface, parent);
if (!sub) {
wl_resource_post_no_memory(resource);
return;
}
surface->committed = subsurface_committed;
surface->committed_private = sub;
weston_surface_set_label_func(surface, subsurface_get_label);
}
static void
subcompositor_destroy(struct wl_client *client, struct wl_resource *resource)
{
wl_resource_destroy(resource);
}
static const struct wl_subcompositor_interface subcompositor_interface = {
subcompositor_destroy,
subcompositor_get_subsurface
};
static void
bind_subcompositor(struct wl_client *client,
void *data, uint32_t version, uint32_t id)
{
struct weston_compositor *compositor = data;
struct wl_resource *resource;
resource =
wl_resource_create(client, &wl_subcompositor_interface, 1, id);
if (resource == NULL) {
wl_client_post_no_memory(client);
return;
}
wl_resource_set_implementation(resource, &subcompositor_interface,
compositor, NULL);
}
/** Set a DPMS mode on all of the compositor's outputs
*
* \param compositor The compositor instance
* \param state The DPMS state the outputs will be set to
*/
static void
weston_compositor_dpms(struct weston_compositor *compositor,
enum dpms_enum state)
{
struct weston_output *output;
wl_list_for_each(output, &compositor->output_list, link)
if (output->set_dpms)
output->set_dpms(output, state);
}
/** Restores the compositor to active status
*
* \param compositor The compositor instance
*
* If the compositor was in a sleeping mode, all outputs are powered
* back on via DPMS. Otherwise if the compositor was inactive
* (idle/locked, offscreen, or sleeping) then the compositor's wake
* signal will fire.
*
* Restarts the idle timer.
*/
WL_EXPORT void
weston_compositor_wake(struct weston_compositor *compositor)
{
uint32_t old_state = compositor->state;
/* The state needs to be changed before emitting the wake
* signal because that may try to schedule a repaint which
* will not work if the compositor is still sleeping */
compositor->state = WESTON_COMPOSITOR_ACTIVE;
switch (old_state) {
case WESTON_COMPOSITOR_SLEEPING:
case WESTON_COMPOSITOR_IDLE:
case WESTON_COMPOSITOR_OFFSCREEN:
weston_compositor_dpms(compositor, WESTON_DPMS_ON);
wl_signal_emit(&compositor->wake_signal, compositor);
/* fall through */
default:
wl_event_source_timer_update(compositor->idle_source,
compositor->idle_time * 1000);
}
}
/** Turns off rendering and frame events for the compositor.
*
* \param compositor The compositor instance
*
* This is used for example to prevent further rendering while the
* compositor is shutting down.
*
* Stops the idle timer.
*/
WL_EXPORT void
weston_compositor_offscreen(struct weston_compositor *compositor)
{
switch (compositor->state) {
case WESTON_COMPOSITOR_OFFSCREEN:
return;
case WESTON_COMPOSITOR_SLEEPING:
default:
compositor->state = WESTON_COMPOSITOR_OFFSCREEN;
wl_event_source_timer_update(compositor->idle_source, 0);
}
}
/** Powers down all attached output devices
*
* \param compositor The compositor instance
*
* Causes rendering to the outputs to cease, and no frame events to be
* sent. Only powers down the outputs if the compositor is not already
* in sleep mode.
*
* Stops the idle timer.
*/
WL_EXPORT void
weston_compositor_sleep(struct weston_compositor *compositor)
{
if (compositor->state == WESTON_COMPOSITOR_SLEEPING)
return;
wl_event_source_timer_update(compositor->idle_source, 0);
compositor->state = WESTON_COMPOSITOR_SLEEPING;
weston_compositor_dpms(compositor, WESTON_DPMS_OFF);
}
/** Sets compositor to idle mode
*
* \param data The compositor instance
*
* This is called when the idle timer fires. Once the compositor is in
* idle mode it requires a wake action (e.g. via
* weston_compositor_wake()) to restore it. The compositor's
* idle_signal will be triggered when the idle event occurs.
*
* Idleness can be inhibited by setting the compositor's idle_inhibit
* property.
*/
static int
idle_handler(void *data)
{
struct weston_compositor *compositor = data;
if (compositor->idle_inhibit)
return 1;
compositor->state = WESTON_COMPOSITOR_IDLE;
wl_signal_emit(&compositor->idle_signal, compositor);
return 1;
}
WL_EXPORT void
weston_plane_init(struct weston_plane *plane,
struct weston_compositor *ec,
int32_t x, int32_t y)
{
pixman_region32_init(&plane->damage);
pixman_region32_init(&plane->clip);
plane->x = x;
plane->y = y;
plane->compositor = ec;
/* Init the link so that the call to wl_list_remove() when releasing
* the plane without ever stacking doesn't lead to a crash */
wl_list_init(&plane->link);
}
WL_EXPORT void
weston_plane_release(struct weston_plane *plane)
{
struct weston_view *view;
pixman_region32_fini(&plane->damage);
pixman_region32_fini(&plane->clip);
wl_list_for_each(view, &plane->compositor->view_list, link) {
if (view->plane == plane)
view->plane = NULL;
}
wl_list_remove(&plane->link);
}
WL_EXPORT void
weston_compositor_stack_plane(struct weston_compositor *ec,
struct weston_plane *plane,
struct weston_plane *above)
{
if (above)
wl_list_insert(above->link.prev, &plane->link);
else
wl_list_insert(&ec->plane_list, &plane->link);
}
static void
output_release(struct wl_client *client, struct wl_resource *resource)
{
wl_resource_destroy(resource);
}
static const struct wl_output_interface output_interface = {
output_release,
};
static void unbind_resource(struct wl_resource *resource)
{
wl_list_remove(wl_resource_get_link(resource));
}
static void
bind_output(struct wl_client *client,
void *data, uint32_t version, uint32_t id)
{
struct weston_head *head = data;
struct weston_output *output = head->output;
struct weston_mode *mode;
struct wl_resource *resource;
resource = wl_resource_create(client, &wl_output_interface,
version, id);
if (resource == NULL) {
wl_client_post_no_memory(client);
return;
}
wl_list_insert(&head->resource_list, wl_resource_get_link(resource));
wl_resource_set_implementation(resource, &output_interface, head,
unbind_resource);
assert(output);
wl_output_send_geometry(resource,
output->x,
output->y,
head->mm_width,
head->mm_height,
head->subpixel,
head->make, head->model,
output->transform);
if (version >= WL_OUTPUT_SCALE_SINCE_VERSION)
wl_output_send_scale(resource,
output->current_scale);
wl_list_for_each (mode, &output->mode_list, link) {
wl_output_send_mode(resource,
mode->flags,
mode->width,
mode->height,
mode->refresh);
}
if (version >= WL_OUTPUT_DONE_SINCE_VERSION)
wl_output_send_done(resource);
}
static void
weston_head_add_global(struct weston_head *head)
{
head->global = wl_global_create(head->compositor->wl_display,
&wl_output_interface, 3,
head, bind_output);
}
/** Remove the global wl_output protocol object
*
* \param head The head whose global to remove.
*
* Also orphans the wl_resources for this head (wl_output).
*/
static void
weston_head_remove_global(struct weston_head *head)
{
struct wl_resource *resource, *tmp;
if (head->global)
wl_global_destroy(head->global);
head->global = NULL;
wl_resource_for_each_safe(resource, tmp, &head->resource_list) {
unbind_resource(resource);
wl_resource_set_destructor(resource, NULL);
wl_resource_set_user_data(resource, NULL);
}
}
/** Get the backing object of wl_output
*
* \param resource A wl_output protocol object.
* \return The backing object (user data) of a wl_resource representing a
* wl_output protocol object.
*/
WL_EXPORT struct weston_head *
weston_head_from_resource(struct wl_resource *resource)
{
assert(wl_resource_instance_of(resource, &wl_output_interface,
&output_interface));
return wl_resource_get_user_data(resource);
}
/** Initialize a pre-allocated weston_head
*
* \param head The head to initialize.
* \param name The head name, e.g. the connector name or equivalent.
*
* The head will be safe to attach, detach and release.
*
* The name is used in logs, and can be used by compositors as a configuration
* identifier.
*
* \memberof weston_head
* \internal
*/
WL_EXPORT void
weston_head_init(struct weston_head *head, const char *name)
{
/* Add some (in)sane defaults which can be used
* for checking if an output was properly configured
*/
memset(head, 0, sizeof *head);
wl_list_init(&head->compositor_link);
wl_signal_init(&head->destroy_signal);
wl_list_init(&head->output_link);
wl_list_init(&head->resource_list);
head->name = strdup(name);
}
/** Send output heads changed signal
*
* \param output The output that changed.
*
* Notify that the enabled output gained and/or lost heads, or that the
* associated heads may have changed their connection status. This does not
* include cases where the output becomes enabled or disabled. The registered
* callbacks are called after the change has successfully happened.
*
* If connection status change causes the compositor to attach or detach a head
* to an enabled output, the registered callbacks may be called multiple times.
*/
static void
weston_output_emit_heads_changed(struct weston_output *output)
{
wl_signal_emit(&output->compositor->output_heads_changed_signal,
output);
}
/** Idle task for emitting heads_changed_signal */
static void
weston_compositor_call_heads_changed(void *data)
{
struct weston_compositor *compositor = data;
struct weston_head *head;
compositor->heads_changed_source = NULL;
wl_signal_emit(&compositor->heads_changed_signal, compositor);
wl_list_for_each(head, &compositor->head_list, compositor_link) {
if (head->output && head->output->enabled)
weston_output_emit_heads_changed(head->output);
}
}
/** Schedule a call on idle to heads_changed callback
*
* \param compositor The Compositor.
*
* \memberof weston_compositor
* \internal
*/
static void
weston_compositor_schedule_heads_changed(struct weston_compositor *compositor)
{
struct wl_event_loop *loop;
if (compositor->heads_changed_source)
return;
loop = wl_display_get_event_loop(compositor->wl_display);
compositor->heads_changed_source = wl_event_loop_add_idle(loop,
weston_compositor_call_heads_changed, compositor);
}
/** Register a new head
*
* \param compositor The compositor.
* \param head The head to register, must not be already registered.
*
* This signals the core that a new head has become available, leading to
* heads_changed hook being called later.
*
* \memberof weston_compositor
* \internal
*/
WL_EXPORT void
weston_compositor_add_head(struct weston_compositor *compositor,
struct weston_head *head)
{
assert(wl_list_empty(&head->compositor_link));
assert(head->name);
wl_list_insert(compositor->head_list.prev, &head->compositor_link);
head->compositor = compositor;
weston_compositor_schedule_heads_changed(compositor);
}
/** Adds a listener to be called when heads change
*
* \param compositor The compositor.
* \param listener The listener to add.
*
* The listener notify function argument is the \var compositor.
*
* The listener function will be called after heads are added or their
* connection status has changed. Several changes may be accumulated into a
* single call. The user is expected to iterate over the existing heads and
* check their statuses to find out what changed.
*
* \sa weston_compositor_iterate_heads, weston_head_is_connected,
* weston_head_is_enabled
* \memberof weston_compositor
*/
WL_EXPORT void
weston_compositor_add_heads_changed_listener(struct weston_compositor *compositor,
struct wl_listener *listener)
{
wl_signal_add(&compositor->heads_changed_signal, listener);
}
/** Iterate over available heads
*
* \param compositor The compositor.
* \param item The iterator, or NULL for start.
* \return The next available head in the list.
*
* Returns all available heads, regardless of being connected or enabled.
*
* You can iterate over all heads as follows:
* \code
* struct weston_head *head = NULL;
*
* while ((head = weston_compositor_iterate_heads(compositor, head))) {
* ...
* }
* \endcode
*
* If you cause \c iter to be removed from the list, you cannot use it to
* continue iterating. Removing any other item is safe.
*
* \memberof weston_compositor
*/
WL_EXPORT struct weston_head *
weston_compositor_iterate_heads(struct weston_compositor *compositor,
struct weston_head *iter)
{
struct wl_list *list = &compositor->head_list;
struct wl_list *node;
assert(compositor);
assert(!iter || iter->compositor == compositor);
if (iter)
node = iter->compositor_link.next;
else
node = list->next;
assert(node);
assert(!iter || node != &iter->compositor_link);
if (node == list)
return NULL;
return container_of(node, struct weston_head, compositor_link);
}
/** Iterate over attached heads
*
* \param output The output whose heads to iterate.
* \param item The iterator, or NULL for start.
* \return The next attached head in the list.
*
* Returns all heads currently attached to the output.
*
* You can iterate over all heads as follows:
* \code
* struct weston_head *head = NULL;
*
* while ((head = weston_output_iterate_heads(output, head))) {
* ...
* }
* \endcode
*
* If you cause \c iter to be removed from the list, you cannot use it to
* continue iterating. Removing any other item is safe.
*
* \memberof weston_compositor
*/
WL_EXPORT struct weston_head *
weston_output_iterate_heads(struct weston_output *output,
struct weston_head *iter)
{
struct wl_list *list = &output->head_list;
struct wl_list *node;
assert(output);
assert(!iter || iter->output == output);
if (iter)
node = iter->output_link.next;
else
node = list->next;
assert(node);
assert(!iter || node != &iter->output_link);
if (node == list)
return NULL;
return container_of(node, struct weston_head, output_link);
}
/** Attach a head to an output
*
* \param output The output to attach to.
* \param head The head that is not yet attached.
* \return 0 on success, -1 on failure.
*
* Attaches the given head to the output. All heads of an output are clones
* and share the resolution and timings.
*
* Cloning heads this way uses less resources than creating an output for
* each head, but is not always possible due to environment, driver and hardware
* limitations.
*
* On failure, the head remains unattached. Success of this function does not
* guarantee the output configuration is actually valid. The final checks are
* made on weston_output_enable() unless the output was already enabled.
*
* \memberof weston_output
*/
WL_EXPORT int
weston_output_attach_head(struct weston_output *output,
struct weston_head *head)
{
char *head_names;
if (!wl_list_empty(&head->output_link))
return -1;
if (output->attach_head) {
if (output->attach_head(output, head) < 0)
return -1;
} else if (!wl_list_empty(&output->head_list)) {
/* No support for clones in the legacy path. */
return -1;
}
head->output = output;
wl_list_insert(output->head_list.prev, &head->output_link);
if (output->enabled) {
weston_head_add_global(head);
head_names = weston_output_create_heads_string(output);
weston_log("Output '%s' updated to have head(s) %s\n",
output->name, head_names);
free(head_names);
weston_output_emit_heads_changed(output);
}
return 0;
}
/** Detach a head from its output
*
* \param head The head to detach.
*
* It is safe to detach a non-attached head.
*
* If the head is attached to an enabled output and the output will be left
* with no heads, the output will be disabled.
*
* \memberof weston_head
* \sa weston_output_disable
*/
WL_EXPORT void
weston_head_detach(struct weston_head *head)
{
struct weston_output *output = head->output;
char *head_names;
wl_list_remove(&head->output_link);
wl_list_init(&head->output_link);
head->output = NULL;
if (!output)
return;
if (output->detach_head)
output->detach_head(output, head);
if (output->enabled) {
weston_head_remove_global(head);
if (wl_list_empty(&output->head_list)) {
weston_log("Output '%s' no heads left, disabling.\n",
output->name);
weston_output_disable(output);
} else {
head_names = weston_output_create_heads_string(output);
weston_log("Output '%s' updated to have head(s) %s\n",
output->name, head_names);
free(head_names);
weston_output_emit_heads_changed(output);
}
}
}
/** Destroy a head
*
* \param head The head to be released.
*
* Destroys the head. The caller is responsible for freeing the memory pointed
* to by \c head.
*
* \memberof weston_head
* \internal
*/
WL_EXPORT void
weston_head_release(struct weston_head *head)
{
wl_signal_emit(&head->destroy_signal, head);
weston_head_detach(head);
free(head->make);
free(head->model);
free(head->serial_number);
free(head->name);
wl_list_remove(&head->compositor_link);
}
static void
weston_head_set_device_changed(struct weston_head *head)
{
head->device_changed = true;
if (head->compositor)
weston_compositor_schedule_heads_changed(head->compositor);
}
/** String equal comparison with NULLs being equal */
static bool
str_null_eq(const char *a, const char *b)
{
if (!a && !b)
return true;
if (!!a != !!b)
return false;
return strcmp(a, b) == 0;
}
/** Store monitor make, model and serial number
*
* \param head The head to modify.
* \param make The monitor make. If EDID is available, the PNP ID. Otherwise
* any string, or NULL for none.
* \param model The monitor model or name, or a made-up string, or NULL for
* none.
* \param serialno The monitor serial number, a made-up string, or NULL for
* none.
*
* This may set the device_changed flag.
*
* \memberof weston_head
* \internal
*/
WL_EXPORT void
weston_head_set_monitor_strings(struct weston_head *head,
const char *make,
const char *model,
const char *serialno)
{
if (str_null_eq(head->make, make) &&
str_null_eq(head->model, model) &&
str_null_eq(head->serial_number, serialno))
return;
free(head->make);
free(head->model);
free(head->serial_number);
head->make = make ? strdup(make) : NULL;
head->model = model ? strdup(model) : NULL;
head->serial_number = serialno ? strdup(serialno) : NULL;
weston_head_set_device_changed(head);
}
/** Store display non-desktop status
*
* \param head The head to modify.
* \param non_desktop Whether the head connects to a non-desktop display.
*
* \memberof weston_head
* \internal
*/
WL_EXPORT void
weston_head_set_non_desktop(struct weston_head *head, bool non_desktop)
{
if (head->non_desktop == non_desktop)
return;
head->non_desktop = non_desktop;
weston_head_set_device_changed(head);
}
/** Store physical image size
*
* \param head The head to modify.
* \param mm_width Image area width in millimeters.
* \param mm_height Image area height in millimeters.
*
* This may set the device_changed flag.
*
* \memberof weston_head
* \internal
*/
WL_EXPORT void
weston_head_set_physical_size(struct weston_head *head,
int32_t mm_width, int32_t mm_height)
{
if (head->mm_width == mm_width &&
head->mm_height == mm_height)
return;
head->mm_width = mm_width;
head->mm_height = mm_height;
weston_head_set_device_changed(head);
}
/** Store monitor sub-pixel layout
*
* \param head The head to modify.
* \param sp Sub-pixel layout. The possible values are:
* - WL_OUTPUT_SUBPIXEL_UNKNOWN,
* - WL_OUTPUT_SUBPIXEL_NONE,
* - WL_OUTPUT_SUBPIXEL_HORIZONTAL_RGB,
* - WL_OUTPUT_SUBPIXEL_HORIZONTAL_BGR,
* - WL_OUTPUT_SUBPIXEL_VERTICAL_RGB,
* - WL_OUTPUT_SUBPIXEL_VERTICAL_BGR
*
* This may set the device_changed flag.
*
* \memberof weston_head
* \internal
*/
WL_EXPORT void
weston_head_set_subpixel(struct weston_head *head,
enum wl_output_subpixel sp)
{
if (head->subpixel == sp)
return;
head->subpixel = sp;
weston_head_set_device_changed(head);
}
/** Mark the monitor as internal
*
* This is used for embedded screens, like laptop panels.
*
* \param head The head to mark as internal.
*
* By default a head is external. The type is often inferred from the physical
* connector type.
*
* \memberof weston_head
* \internal
*/
WL_EXPORT void
weston_head_set_internal(struct weston_head *head)
{
head->connection_internal = true;
}
/** Store connector status
*
* \param head The head to modify.
* \param connected Whether the head is connected.
*
* Connectors are created as disconnected. This function can be used to
* set the connector status.
*
* The status should be set to true when a physical connector is connected to
* a video sink device like a monitor and to false when the connector is
* disconnected. For nested backends, the connection status should reflect the
* connection to the parent display server.
*
* When the connection status changes, it schedules a call to the heads_changed
* hook and sets the device_changed flag.
*
* \sa weston_compositor_set_heads_changed_cb
* \memberof weston_head
* \internal
*/
WL_EXPORT void
weston_head_set_connection_status(struct weston_head *head, bool connected)
{
if (head->connected == connected)
return;
head->connected = connected;
weston_head_set_device_changed(head);
}
/** Is the head currently connected?
*
* \param head The head to query.
* \return Connection status.
*
* Returns true if the head is physically connected to a monitor, or in
* case of a nested backend returns true when there is a connection to the
* parent display server.
*
* This is independent from the head being enabled.
*
* \sa weston_head_is_enabled
* \memberof weston_head
*/
WL_EXPORT bool
weston_head_is_connected(struct weston_head *head)
{
return head->connected;
}
/** Is the head currently enabled?
*
* \param head The head to query.
* \return Video status.
*
* Returns true if the head is currently transmitting a video stream.
*
* This is independent of the head being connected.
*
* \sa weston_head_is_connected
* \memberof weston_head
*/
WL_EXPORT bool
weston_head_is_enabled(struct weston_head *head)
{
if (!head->output)
return false;
return head->output->enabled;
}
/** Has the device information changed?
*
* \param head The head to query.
* \return True if the device information has changed since last reset.
*
* The information about the connected display device, e.g. a monitor, may
* change without being disconnected in between. Changing information
* causes a call to the heads_changed hook.
*
* The information includes make, model, serial number, physical size,
* and sub-pixel type. The connection status is also included.
*
* \sa weston_head_reset_device_changed, weston_compositor_set_heads_changed_cb
* \memberof weston_head
*/
WL_EXPORT bool
weston_head_is_device_changed(struct weston_head *head)
{
return head->device_changed;
}
/** Does the head represent a non-desktop display?
*
* \param head The head to query.
* \return True if the device is a non-desktop display.
*
* Non-desktop heads are not attached to outputs by default.
* This stops weston from extending the desktop onto head mounted displays.
*
* \memberof weston_head
*/
WL_EXPORT bool
weston_head_is_non_desktop(struct weston_head *head)
{
return head->non_desktop;
}
/** Acknowledge device information change
*
* \param head The head to acknowledge.
*
* Clears the device changed flag on this head. When a compositor has processed
* device information, it should call this to be able to notice further
* changes.
*
* \sa weston_head_is_device_changed
* \memberof weston_head
*/
WL_EXPORT void
weston_head_reset_device_changed(struct weston_head *head)
{
head->device_changed = false;
}
/** Get the name of a head
*
* \param head The head to query.
* \return The head's name, not NULL.
*
* The name depends on the backend. The DRM backend uses connector names,
* other backends may use hardcoded names or user-given names.
*/
WL_EXPORT const char *
weston_head_get_name(struct weston_head *head)
{
return head->name;
}
/** Get the output the head is attached to
*
* \param head The head to query.
* \return The output the head is attached to, or NULL if detached.
*/
WL_EXPORT struct weston_output *
weston_head_get_output(struct weston_head *head)
{
return head->output;
}
/** Add destroy callback for a head
*
* \param head The head to watch for.
* \param listener The listener to add. The \c notify member must be set.
*
* Heads may get destroyed for various reasons by the backends. If a head is
* attached to an output, the compositor should listen for head destruction
* and reconfigure or destroy the output if necessary.
*
* The destroy callbacks will be called on weston_head destruction before any
* automatic detaching from an associated weston_output and before any
* weston_head information is lost.
*
* The \c data argument to the notify callback is the weston_head being
* destroyed.
*/
WL_EXPORT void
weston_head_add_destroy_listener(struct weston_head *head,
struct wl_listener *listener)
{
wl_signal_add(&head->destroy_signal, listener);
}
/** Look up destroy listener for a head
*
* \param head The head to query.
* \param notify The notify function used used for the added destroy listener.
* \return The listener, or NULL if not found.
*
* This looks up the previously added destroy listener struct based on the
* notify function it has. The listener can be used to access user data
* through \c container_of().
*
* \sa wl_signal_get()
*/
WL_EXPORT struct wl_listener *
weston_head_get_destroy_listener(struct weston_head *head,
wl_notify_func_t notify)
{
return wl_signal_get(&head->destroy_signal, notify);
}
/* Move other outputs when one is resized so the space remains contiguous. */
static void
weston_compositor_reflow_outputs(struct weston_compositor *compositor,
struct weston_output *resized_output, int delta_width)
{
struct weston_output *output;
bool start_resizing = false;
if (!delta_width)
return;
wl_list_for_each(output, &compositor->output_list, link) {
if (output == resized_output) {
start_resizing = true;
continue;
}
if (start_resizing) {
weston_output_move(output, output->x + delta_width, output->y);
output->dirty = 1;
}
}
}
static void
weston_output_update_matrix(struct weston_output *output)
{
float magnification;
weston_matrix_init(&output->matrix);
weston_matrix_translate(&output->matrix, -output->x, -output->y, 0);
if (output->zoom.active) {
magnification = 1 / (1 - output->zoom.spring_z.current);
weston_output_update_zoom(output);
weston_matrix_translate(&output->matrix, -output->zoom.trans_x,
-output->zoom.trans_y, 0);
weston_matrix_scale(&output->matrix, magnification,
magnification, 1.0);
}
switch (output->transform) {
case WL_OUTPUT_TRANSFORM_FLIPPED:
case WL_OUTPUT_TRANSFORM_FLIPPED_90:
case WL_OUTPUT_TRANSFORM_FLIPPED_180:
case WL_OUTPUT_TRANSFORM_FLIPPED_270:
weston_matrix_translate(&output->matrix, -output->width, 0, 0);
weston_matrix_scale(&output->matrix, -1, 1, 1);
break;
}
switch (output->transform) {
default:
case WL_OUTPUT_TRANSFORM_NORMAL:
case WL_OUTPUT_TRANSFORM_FLIPPED:
break;
case WL_OUTPUT_TRANSFORM_90:
case WL_OUTPUT_TRANSFORM_FLIPPED_90:
weston_matrix_translate(&output->matrix, 0, -output->height, 0);
weston_matrix_rotate_xy(&output->matrix, 0, 1);
break;
case WL_OUTPUT_TRANSFORM_180:
case WL_OUTPUT_TRANSFORM_FLIPPED_180:
weston_matrix_translate(&output->matrix,
-output->width, -output->height, 0);
weston_matrix_rotate_xy(&output->matrix, -1, 0);
break;
case WL_OUTPUT_TRANSFORM_270:
case WL_OUTPUT_TRANSFORM_FLIPPED_270:
weston_matrix_translate(&output->matrix, -output->width, 0, 0);
weston_matrix_rotate_xy(&output->matrix, 0, -1);
break;
}
if (output->current_scale != 1)
weston_matrix_scale(&output->matrix,
output->current_scale,
output->current_scale, 1);
output->dirty = 0;
weston_matrix_invert(&output->inverse_matrix, &output->matrix);
}
static void
weston_output_transform_scale_init(struct weston_output *output, uint32_t transform, uint32_t scale)
{
output->transform = transform;
output->native_scale = scale;
output->current_scale = scale;
convert_size_by_transform_scale(&output->width, &output->height,
output->current_mode->width,
output->current_mode->height,
transform, scale);
}
static void
weston_output_init_geometry(struct weston_output *output, int x, int y)
{
output->x = x;
output->y = y;
pixman_region32_fini(&output->previous_damage);
pixman_region32_init(&output->previous_damage);
pixman_region32_fini(&output->region);
pixman_region32_init_rect(&output->region, x, y,
output->width,
output->height);
}
WL_EXPORT void
weston_output_move(struct weston_output *output, int x, int y)
{
struct weston_head *head;
struct wl_resource *resource;
int ver;
output->move_x = x - output->x;
output->move_y = y - output->y;
if (output->move_x == 0 && output->move_y == 0)
return;
weston_output_init_geometry(output, x, y);
output->dirty = 1;
/* Move views on this output. */
wl_signal_emit(&output->compositor->output_moved_signal, output);
/* Notify clients of the change for output position. */
wl_list_for_each(head, &output->head_list, output_link) {
wl_resource_for_each(resource, &head->resource_list) {
wl_output_send_geometry(resource,
output->x,
output->y,
head->mm_width,
head->mm_height,
head->subpixel,
head->make,
head->model,
output->transform);
ver = wl_resource_get_version(resource);
if (ver >= WL_OUTPUT_DONE_SINCE_VERSION)
wl_output_send_done(resource);
}
}
}
/** Signal that a pending output is taken into use.
*
* Removes the output from the pending list and adds it to the compositor's
* list of enabled outputs. The output created signal is emitted.
*
* The output gets an internal ID assigned, and the wl_output global is
* created.
*
* \param compositor The compositor instance.
* \param output The output to be added.
*
* \internal
*/
static void
weston_compositor_add_output(struct weston_compositor *compositor,
struct weston_output *output)
{
struct weston_view *view, *next;
struct weston_head *head;
assert(!output->enabled);
/* Verify we haven't reached the limit of 32 available output IDs */
assert(ffs(~compositor->output_id_pool) > 0);
/* Invert the output id pool and look for the lowest numbered
* switch (the least significant bit). Take that bit's position
* as our ID, and mark it used in the compositor's output_id_pool.
*/
output->id = ffs(~compositor->output_id_pool) - 1;
compositor->output_id_pool |= 1u << output->id;
wl_list_remove(&output->link);
wl_list_insert(compositor->output_list.prev, &output->link);
output->enabled = true;
wl_list_for_each(head, &output->head_list, output_link)
weston_head_add_global(head);
wl_signal_emit(&compositor->output_created_signal, output);
wl_list_for_each_safe(view, next, &compositor->view_list, link)
weston_view_geometry_dirty(view);
}
/** Transform device coordinates into global coordinates
*
* \param device_x[in] X coordinate in device units.
* \param device_y[in] Y coordinate in device units.
* \param x[out] X coordinate in the global space.
* \param y[out] Y coordinate in the global space.
*
* Transforms coordinates from the device coordinate space
* (physical pixel units) to the global coordinate space (logical pixel units).
* This takes into account output transform and scale.
*
* \memberof weston_output
* \internal
*/
WL_EXPORT void
weston_output_transform_coordinate(struct weston_output *output,
double device_x, double device_y,
double *x, double *y)
{
struct weston_vector p = { {
device_x,
device_y,
0.0,
1.0 } };
weston_matrix_transform(&output->inverse_matrix, &p);
*x = p.f[0] / p.f[3];
*y = p.f[1] / p.f[3];
}
/** Removes output from compositor's list of enabled outputs
*
* \param output The weston_output object that is being removed.
*
* The following happens:
*
* - The output assignments of all views in the current scenegraph are
* recomputed.
*
* - Presentation feedback is discarded.
*
* - Compositor is notified that outputs were changed and
* applies the necessary changes to re-layout outputs.
*
* - The output is put back in the pending outputs list.
*
* - Signal is emitted to notify all users of the weston_output
* object that the output is being destroyed.
*
* - wl_output protocol objects referencing this weston_output
* are made inert, and the wl_output global is removed.
*
* - The output's internal ID is released.
*
* \memberof weston_output
* \internal
*/
static void
weston_compositor_remove_output(struct weston_output *output)
{
struct weston_compositor *compositor = output->compositor;
struct weston_view *view;
struct weston_head *head;
assert(output->destroying);
assert(output->enabled);
wl_list_for_each(view, &compositor->view_list, link) {
if (view->output_mask & (1u << output->id))
weston_view_assign_output(view);
}
weston_presentation_feedback_discard_list(&output->feedback_list);
weston_compositor_reflow_outputs(compositor, output, -output->width);
wl_list_remove(&output->link);
wl_list_insert(compositor->pending_output_list.prev, &output->link);
output->enabled = false;
wl_signal_emit(&compositor->output_destroyed_signal, output);
wl_signal_emit(&output->destroy_signal, output);
wl_list_for_each(head, &output->head_list, output_link)
weston_head_remove_global(head);
compositor->output_id_pool &= ~(1u << output->id);
output->id = 0xffffffff; /* invalid */
}
/** Sets the output scale for a given output.
*
* \param output The weston_output object that the scale is set for.
* \param scale Scale factor for the given output.
*
* It only supports setting scale for an output that
* is not enabled and it can only be ran once.
*
* \memberof weston_output
*/
WL_EXPORT void
weston_output_set_scale(struct weston_output *output,
int32_t scale)
{
/* We can only set scale on a disabled output */
assert(!output->enabled);
/* We only want to set scale once */
assert(!output->scale);
output->scale = scale;
}
/** Sets the output transform for a given output.
*
* \param output The weston_output object that the transform is set for.
* \param transform Transform value for the given output.
*
* Refer to wl_output::transform section located at
* https://wayland.freedesktop.org/docs/html/apa.html#protocol-spec-wl_output
* for list of values that can be passed to this function.
*
* \memberof weston_output
*/
WL_EXPORT void
weston_output_set_transform(struct weston_output *output,
uint32_t transform)
{
struct weston_pointer_motion_event ev;
struct wl_resource *resource;
struct weston_seat *seat;
pixman_region32_t old_region;
int mid_x, mid_y;
struct weston_head *head;
int ver;
if (!output->enabled && output->transform == UINT32_MAX) {
output->transform = transform;
return;
}
weston_output_transform_scale_init(output, transform, output->scale);
pixman_region32_init(&old_region);
pixman_region32_copy(&old_region, &output->region);
weston_output_init_geometry(output, output->x, output->y);
output->dirty = 1;
/* Notify clients of the change for output transform. */
wl_list_for_each(head, &output->head_list, output_link) {
wl_resource_for_each(resource, &head->resource_list) {
wl_output_send_geometry(resource,
output->x,
output->y,
head->mm_width,
head->mm_height,
head->subpixel,
head->make,
head->model,
output->transform);
ver = wl_resource_get_version(resource);
if (ver >= WL_OUTPUT_DONE_SINCE_VERSION)
wl_output_send_done(resource);
}
}
/* we must ensure that pointers are inside output, otherwise they disappear */
mid_x = output->x + output->width / 2;
mid_y = output->y + output->height / 2;
ev.mask = WESTON_POINTER_MOTION_ABS;
ev.x = wl_fixed_to_double(wl_fixed_from_int(mid_x));
ev.y = wl_fixed_to_double(wl_fixed_from_int(mid_y));
wl_list_for_each(seat, &output->compositor->seat_list, link) {
struct weston_pointer *pointer = weston_seat_get_pointer(seat);
if (pointer && pixman_region32_contains_point(&old_region,
wl_fixed_to_int(pointer->x),
wl_fixed_to_int(pointer->y),
NULL))
weston_pointer_move(pointer, &ev);
}
}
/** Initializes a weston_output object with enough data so
** an output can be configured.
*
* \param output The weston_output object to initialize
* \param compositor The compositor instance.
* \param name Name for the output (the string is copied).
*
* Sets initial values for fields that are expected to be
* configured either by compositors or backends.
*
* The name is used in logs, and can be used by compositors as a configuration
* identifier.
*
* \memberof weston_output
* \internal
*/
WL_EXPORT void
weston_output_init(struct weston_output *output,
struct weston_compositor *compositor,
const char *name)
{
output->compositor = compositor;
output->destroying = 0;
output->name = strdup(name);
wl_list_init(&output->link);
wl_signal_init(&output->user_destroy_signal);
output->enabled = false;
wl_list_init(&output->head_list);
/* Add some (in)sane defaults which can be used
* for checking if an output was properly configured
*/
output->scale = 0;
/* Can't use -1 on uint32_t and 0 is valid enum value */
output->transform = UINT32_MAX;
pixman_region32_init(&output->previous_damage);
pixman_region32_init(&output->region);
wl_list_init(&output->mode_list);
}
/** Adds weston_output object to pending output list.
*
* \param output The weston_output object to add
* \param compositor The compositor instance.
*
* The opposite of this operation is built into weston_output_release().
*
* \memberof weston_output
* \internal
*/
WL_EXPORT void
weston_compositor_add_pending_output(struct weston_output *output,
struct weston_compositor *compositor)
{
assert(output->disable);
assert(output->enable);
wl_list_remove(&output->link);
wl_list_insert(compositor->pending_output_list.prev, &output->link);
}
/** Create a string with the attached heads' names.
*
* The string must be free()'d.
*/
static char *
weston_output_create_heads_string(struct weston_output *output)
{
FILE *fp;
char *str = NULL;
size_t size = 0;
struct weston_head *head;
const char *sep = "";
fp = open_memstream(&str, &size);
if (!fp)
return NULL;
wl_list_for_each(head, &output->head_list, output_link) {
fprintf(fp, "%s%s", sep, head->name);
sep = ", ";
}
fclose(fp);
return str;
}
/** Constructs a weston_output object that can be used by the compositor.
*
* \param output The weston_output object that needs to be enabled. Must not
* be enabled already. Must have at least one head attached.
*
* Output coordinates are calculated and each new output is by default
* assigned to the right of previous one.
*
* Sets up the transformation, zoom, and geometry of the output using
* the properties that need to be configured by the compositor.
*
* Establishes a repaint timer for the output with the relevant display
* object's event loop. See output_repaint_timer_handler().
*
* The output is assigned an ID. Weston can support up to 32 distinct
* outputs, with IDs numbered from 0-31; the compositor's output_id_pool
* is referred to and used to find the first available ID number, and
* then this ID is marked as used in output_id_pool.
*
* The output is also assigned a Wayland global with the wl_output
* external interface.
*
* Backend specific function is called to set up the output output.
*
* Output is added to the compositor's output list
*
* If the backend specific function fails, the weston_output object
* is returned to a state it was before calling this function and
* is added to the compositor's pending_output_list in case it needs
* to be reconfigured or just so it can be destroyed at shutdown.
*
* 0 is returned on success, -1 on failure.
*/
WL_EXPORT int
weston_output_enable(struct weston_output *output)
{
struct weston_compositor *c = output->compositor;
struct weston_output *iterator;
struct weston_head *head;
char *head_names;
int x = 0, y = 0;
if (output->enabled) {
weston_log("Error: attempt to enable an enabled output '%s'\n",
output->name);
return -1;
}
if (wl_list_empty(&output->head_list)) {
weston_log("Error: cannot enable output '%s' without heads.\n",
output->name);
return -1;
}
if (wl_list_empty(&output->mode_list) || !output->current_mode) {
weston_log("Error: no video mode for output '%s'.\n",
output->name);
return -1;
}
wl_list_for_each(head, &output->head_list, output_link) {
assert(head->make);
assert(head->model);
}
iterator = container_of(c->output_list.prev,
struct weston_output, link);
if (!wl_list_empty(&c->output_list))
x = iterator->x + iterator->width;
/* Make sure the scale is set up */
assert(output->scale);
/* Make sure we have a transform set */
assert(output->transform != UINT32_MAX);
output->x = x;
output->y = y;
output->dirty = 1;
output->original_scale = output->scale;
weston_output_transform_scale_init(output, output->transform, output->scale);
weston_output_init_zoom(output);
weston_output_init_geometry(output, x, y);
weston_output_damage(output);
wl_signal_init(&output->frame_signal);
wl_signal_init(&output->destroy_signal);
wl_list_init(&output->animation_list);
wl_list_init(&output->feedback_list);
/* Enable the output (set up the crtc or create a
* window representing the output, set up the
* renderer, etc)
*/
if (output->enable(output) < 0) {
weston_log("Enabling output \"%s\" failed.\n", output->name);
return -1;
}
weston_compositor_add_output(output->compositor, output);
head_names = weston_output_create_heads_string(output);
weston_log("Output '%s' enabled with head(s) %s\n",
output->name, head_names);
free(head_names);
return 0;
}
/** Converts a weston_output object to a pending output state, so it
** can be configured again or destroyed.
*
* \param output The weston_output object that needs to be disabled.
*
* Calls a backend specific function to disable an output, in case
* such function exists.
*
* The backend specific disable function may choose to postpone the disabling
* by returning a negative value, in which case this function returns early.
* In that case the backend will guarantee the output will be disabled soon
* by the backend calling this function again. One must not attempt to re-enable
* the output until that happens.
*
* Otherwise, if the output is being used by the compositor, it is removed
* from weston's output_list (see weston_compositor_remove_output())
* and is returned to a state it was before weston_output_enable()
* was ran (see weston_output_enable_undo()).
*
* See weston_output_init() for more information on the
* state output is returned to.
*
* If the output has never been enabled yet, this function can still be
* called to ensure that the output is actually turned off rather than left
* in the state it was discovered in.
*/
WL_EXPORT void
weston_output_disable(struct weston_output *output)
{
/* Should we rename this? */
output->destroying = 1;
/* Disable is called unconditionally also for not-enabled outputs,
* because at compositor start-up, if there is an output that is
* already on but the compositor wants to turn it off, we have to
* forward the turn-off to the backend so it knows to do it.
* The backend cannot initially turn off everything, because it
* would cause unnecessary mode-sets for all outputs the compositor
* wants to be on.
*/
if (output->disable(output) < 0)
return;
if (output->enabled)
weston_compositor_remove_output(output);
output->destroying = 0;
}
/** Forces a synchronous call to heads_changed hook
*
* \param compositor The compositor instance
*
* If there are new or changed heads, calls the heads_changed hook and
* returns after the hook returns.
*/
WL_EXPORT void
weston_compositor_flush_heads_changed(struct weston_compositor *compositor)
{
if (compositor->heads_changed_source) {
wl_event_source_remove(compositor->heads_changed_source);
weston_compositor_call_heads_changed(compositor);
}
}
/** Add destroy callback for an output
*
* \param output The output to watch.
* \param listener The listener to add. The \c notify member must be set.
*
* The listener callback will be called when user destroys an output. This
* may be delayed by a backend in some cases. The main purpose of the
* listener is to allow hooking up custom data to the output. The custom data
* can be fetched via weston_output_get_destroy_listener() followed by
* container_of().
*
* The \c data argument to the notify callback is the weston_output being
* destroyed.
*
* @note This is for the final destruction of an output, not when it gets
* disabled. If you want to keep track of enabled outputs, this is not it.
*/
WL_EXPORT void
weston_output_add_destroy_listener(struct weston_output *output,
struct wl_listener *listener)
{
wl_signal_add(&output->user_destroy_signal, listener);
}
/** Look up destroy listener for an output
*
* \param output The output to query.
* \param notify The notify function used used for the added destroy listener.
* \return The listener, or NULL if not found.
*
* This looks up the previously added destroy listener struct based on the
* notify function it has. The listener can be used to access user data
* through \c container_of().
*
* \sa wl_signal_get() weston_output_add_destroy_listener()
*/
WL_EXPORT struct wl_listener *
weston_output_get_destroy_listener(struct weston_output *output,
wl_notify_func_t notify)
{
return wl_signal_get(&output->user_destroy_signal, notify);
}
/** Uninitialize an output
*
* Removes the output from the list of enabled outputs if necessary, but
* does not call the backend's output disable function. The output will no
* longer be in the list of pending outputs either.
*
* All fields of weston_output become uninitialized, i.e. should not be used
* anymore. The caller can free the memory after this.
*
* \memberof weston_output
* \internal
*/
WL_EXPORT void
weston_output_release(struct weston_output *output)
{
struct weston_head *head, *tmp;
output->destroying = 1;
wl_signal_emit(&output->user_destroy_signal, output);
if (output->idle_repaint_source)
wl_event_source_remove(output->idle_repaint_source);
if (output->enabled)
weston_compositor_remove_output(output);
pixman_region32_fini(&output->region);
pixman_region32_fini(&output->previous_damage);
wl_list_remove(&output->link);
wl_list_for_each_safe(head, tmp, &output->head_list, output_link)
weston_head_detach(head);
free(output->name);
}
/** Find an output by its given name
*
* \param compositor The compositor to search in.
* \param name The output name to search for.
* \return An existing output with the given name, or NULL if not found.
*
* \memberof weston_compositor
*/
WL_EXPORT struct weston_output *
weston_compositor_find_output_by_name(struct weston_compositor *compositor,
const char *name)
{
struct weston_output *output;
wl_list_for_each(output, &compositor->output_list, link)
if (strcmp(output->name, name) == 0)
return output;
wl_list_for_each(output, &compositor->pending_output_list, link)
if (strcmp(output->name, name) == 0)
return output;
return NULL;
}
/** Create a named output
*
* \param compositor The compositor.
* \param name The name for the output.
* \return A new \c weston_output, or NULL on failure.
*
* This creates a new weston_output that starts with no heads attached.
*
* An output must be configured and it must have at least one head before
* it can be enabled.
*
* \memberof weston_compositor
*/
WL_EXPORT struct weston_output *
weston_compositor_create_output(struct weston_compositor *compositor,
const char *name)
{
assert(compositor->backend->create_output);
if (weston_compositor_find_output_by_name(compositor, name)) {
weston_log("Warning: attempted to create an output with a "
"duplicate name '%s'.\n", name);
return NULL;
}
return compositor->backend->create_output(compositor, name);
}
/** Create an output for an unused head
*
* \param compositor The compositor.
* \param head The head to attach to the output.
* \return A new \c weston_output, or NULL on failure.
*
* This creates a new weston_output that starts with the given head attached.
* The output inherits the name of the head. The head must not be already
* attached to another output.
*
* An output must be configured before it can be enabled.
*
* \memberof weston_compositor
*/
WL_EXPORT struct weston_output *
weston_compositor_create_output_with_head(struct weston_compositor *compositor,
struct weston_head *head)
{
struct weston_output *output;
output = weston_compositor_create_output(compositor, head->name);
if (!output)
return NULL;
if (weston_output_attach_head(output, head) < 0) {
weston_output_destroy(output);
return NULL;
}
return output;
}
/** Destroy an output
*
* \param output The output to destroy.
*
* The heads attached to the given output are detached and become unused again.
*
* It is not necessary to explicitly destroy all outputs at compositor exit.
* weston_compositor_destroy() will automatically destroy any remaining
* outputs.
*
* \memberof weston_output
*/
WL_EXPORT void
weston_output_destroy(struct weston_output *output)
{
output->destroy(output);
}
/** When you need a head...
*
* This function is a hack, used until all code has been converted to become
* multi-head aware.
*
* \param output The weston_output whose head to get.
* \return The first head in the output's list.
*/
WL_EXPORT struct weston_head *
weston_output_get_first_head(struct weston_output *output)
{
if (wl_list_empty(&output->head_list))
return NULL;
return container_of(output->head_list.next,
struct weston_head, output_link);
}
static void
destroy_viewport(struct wl_resource *resource)
{
struct weston_surface *surface =
wl_resource_get_user_data(resource);
if (!surface)
return;
surface->viewport_resource = NULL;
surface->pending.buffer_viewport.buffer.src_width =
wl_fixed_from_int(-1);
surface->pending.buffer_viewport.surface.width = -1;
surface->pending.buffer_viewport.changed = 1;
}
static void
viewport_destroy(struct wl_client *client,
struct wl_resource *resource)
{
wl_resource_destroy(resource);
}
static void
viewport_set_source(struct wl_client *client,
struct wl_resource *resource,
wl_fixed_t src_x,
wl_fixed_t src_y,
wl_fixed_t src_width,
wl_fixed_t src_height)
{
struct weston_surface *surface =
wl_resource_get_user_data(resource);
if (!surface) {
wl_resource_post_error(resource,
WP_VIEWPORT_ERROR_NO_SURFACE,
"wl_surface for this viewport is no longer exists");
return;
}
assert(surface->viewport_resource == resource);
assert(surface->resource);
if (src_width == wl_fixed_from_int(-1) &&
src_height == wl_fixed_from_int(-1) &&
src_x == wl_fixed_from_int(-1) &&
src_y == wl_fixed_from_int(-1)) {
/* unset source rect */
surface->pending.buffer_viewport.buffer.src_width =
wl_fixed_from_int(-1);
surface->pending.buffer_viewport.changed = 1;
return;
}
if (src_width <= 0 || src_height <= 0 || src_x < 0 || src_y < 0) {
wl_resource_post_error(resource,
WP_VIEWPORT_ERROR_BAD_VALUE,
"wl_surface@%d viewport source "
"w=%f <= 0, h=%f <= 0, x=%f < 0, or y=%f < 0",
wl_resource_get_id(surface->resource),
wl_fixed_to_double(src_width),
wl_fixed_to_double(src_height),
wl_fixed_to_double(src_x),
wl_fixed_to_double(src_y));
return;
}
surface->pending.buffer_viewport.buffer.src_x = src_x;
surface->pending.buffer_viewport.buffer.src_y = src_y;
surface->pending.buffer_viewport.buffer.src_width = src_width;
surface->pending.buffer_viewport.buffer.src_height = src_height;
surface->pending.buffer_viewport.changed = 1;
}
static void
viewport_set_destination(struct wl_client *client,
struct wl_resource *resource,
int32_t dst_width,
int32_t dst_height)
{
struct weston_surface *surface =
wl_resource_get_user_data(resource);
if (!surface) {
wl_resource_post_error(resource,
WP_VIEWPORT_ERROR_NO_SURFACE,
"wl_surface for this viewport no longer exists");
return;
}
assert(surface->viewport_resource == resource);
if (dst_width == -1 && dst_height == -1) {
/* unset destination size */
surface->pending.buffer_viewport.surface.width = -1;
surface->pending.buffer_viewport.changed = 1;
return;
}
if (dst_width <= 0 || dst_height <= 0) {
wl_resource_post_error(resource,
WP_VIEWPORT_ERROR_BAD_VALUE,
"destination size must be positive (%dx%d)",
dst_width, dst_height);
return;
}
surface->pending.buffer_viewport.surface.width = dst_width;
surface->pending.buffer_viewport.surface.height = dst_height;
surface->pending.buffer_viewport.changed = 1;
}
static const struct wp_viewport_interface viewport_interface = {
viewport_destroy,
viewport_set_source,
viewport_set_destination
};
static void
viewporter_destroy(struct wl_client *client,
struct wl_resource *resource)
{
wl_resource_destroy(resource);
}
static void
viewporter_get_viewport(struct wl_client *client,
struct wl_resource *viewporter,
uint32_t id,
struct wl_resource *surface_resource)
{
int version = wl_resource_get_version(viewporter);
struct weston_surface *surface =
wl_resource_get_user_data(surface_resource);
struct wl_resource *resource;
if (surface->viewport_resource) {
wl_resource_post_error(viewporter,
WP_VIEWPORTER_ERROR_VIEWPORT_EXISTS,
"a viewport for that surface already exists");
return;
}
resource = wl_resource_create(client, &wp_viewport_interface,
version, id);
if (resource == NULL) {
wl_client_post_no_memory(client);
return;
}
wl_resource_set_implementation(resource, &viewport_interface,
surface, destroy_viewport);
surface->viewport_resource = resource;
}
static const struct wp_viewporter_interface viewporter_interface = {
viewporter_destroy,
viewporter_get_viewport
};
static void
bind_viewporter(struct wl_client *client,
void *data, uint32_t version, uint32_t id)
{
struct wl_resource *resource;
resource = wl_resource_create(client, &wp_viewporter_interface,
version, id);
if (resource == NULL) {
wl_client_post_no_memory(client);
return;
}
wl_resource_set_implementation(resource, &viewporter_interface,
NULL, NULL);
}
static void
destroy_presentation_feedback(struct wl_resource *feedback_resource)
{
struct weston_presentation_feedback *feedback;
feedback = wl_resource_get_user_data(feedback_resource);
wl_list_remove(&feedback->link);
free(feedback);
}
static void
presentation_destroy(struct wl_client *client, struct wl_resource *resource)
{
wl_resource_destroy(resource);
}
static void
presentation_feedback(struct wl_client *client,
struct wl_resource *presentation_resource,
struct wl_resource *surface_resource,
uint32_t callback)
{
struct weston_surface *surface;
struct weston_presentation_feedback *feedback;
surface = wl_resource_get_user_data(surface_resource);
feedback = zalloc(sizeof *feedback);
if (feedback == NULL)
goto err_calloc;
feedback->resource = wl_resource_create(client,
&wp_presentation_feedback_interface,
1, callback);
if (!feedback->resource)
goto err_create;
wl_resource_set_implementation(feedback->resource, NULL, feedback,
destroy_presentation_feedback);
wl_list_insert(&surface->pending.feedback_list, &feedback->link);
return;
err_create:
free(feedback);
err_calloc:
wl_client_post_no_memory(client);
}
static const struct wp_presentation_interface presentation_implementation = {
presentation_destroy,
presentation_feedback
};
static void
bind_presentation(struct wl_client *client,
void *data, uint32_t version, uint32_t id)
{
struct weston_compositor *compositor = data;
struct wl_resource *resource;
resource = wl_resource_create(client, &wp_presentation_interface,
version, id);
if (resource == NULL) {
wl_client_post_no_memory(client);
return;
}
wl_resource_set_implementation(resource, &presentation_implementation,
compositor, NULL);
wp_presentation_send_clock_id(resource, compositor->presentation_clock);
}
static void
compositor_bind(struct wl_client *client,
void *data, uint32_t version, uint32_t id)
{
struct weston_compositor *compositor = data;
struct wl_resource *resource;
resource = wl_resource_create(client, &wl_compositor_interface,
version, id);
if (resource == NULL) {
wl_client_post_no_memory(client);
return;
}
wl_resource_set_implementation(resource, &compositor_interface,
compositor, NULL);
}
WL_EXPORT int
weston_environment_get_fd(const char *env)
{
char *e;
int fd, flags;
e = getenv(env);
if (!e || !safe_strtoint(e, &fd))
return -1;
flags = fcntl(fd, F_GETFD);
if (flags == -1)
return -1;
fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
unsetenv(env);
return fd;
}
static void
timeline_key_binding_handler(struct weston_keyboard *keyboard,
const struct timespec *time, uint32_t key,
void *data)
{
struct weston_compositor *compositor = data;
if (weston_timeline_enabled_)
weston_timeline_close();
else
weston_timeline_open(compositor);
}
static const char *
output_repaint_status_text(struct weston_output *output)
{
switch (output->repaint_status) {
case REPAINT_NOT_SCHEDULED:
return "no repaint";
case REPAINT_BEGIN_FROM_IDLE:
return "start_repaint_loop scheduled";
case REPAINT_SCHEDULED:
return "repaint scheduled";
case REPAINT_AWAITING_COMPLETION:
return "awaiting completion";
}
assert(!"output_repaint_status_text missing enum");
return NULL;
}
static void
debug_scene_view_print_buffer(FILE *fp, struct weston_view *view)
{
struct weston_buffer *buffer = view->surface->buffer_ref.buffer;
struct wl_shm_buffer *shm;
struct linux_dmabuf_buffer *dmabuf;
const struct pixel_format_info *pixel_info = NULL;
if (!buffer) {
fprintf(fp, "\t\t[buffer not available]\n");
return;
}
shm = wl_shm_buffer_get(buffer->resource);
if (shm) {
uint32_t _format = wl_shm_buffer_get_format(shm);
pixel_info = pixel_format_get_info_shm(_format);
fprintf(fp, "\t\tSHM buffer\n");
fprintf(fp, "\t\t\tformat: 0x%lx %s\n",
(unsigned long) _format,
pixel_info ? pixel_info->drm_format_name : "UNKNOWN");
return;
}
dmabuf = linux_dmabuf_buffer_get(buffer->resource);
if (dmabuf) {
pixel_info = pixel_format_get_info(dmabuf->attributes.format);
fprintf(fp, "\t\tdmabuf buffer\n");
fprintf(fp, "\t\t\tformat: 0x%lx %s\n",
(unsigned long) dmabuf->attributes.format,
pixel_info ? pixel_info->drm_format_name : "UNKNOWN");
fprintf(fp, "\t\t\tmodifier: 0x%llx\n",
(unsigned long long) dmabuf->attributes.modifier[0]);
return;
}
fprintf(fp, "\t\tEGL buffer\n");
}
static void
debug_scene_view_print(FILE *fp, struct weston_view *view, int view_idx)
{
struct weston_compositor *ec = view->surface->compositor;
struct weston_output *output;
char desc[512];
pixman_box32_t *box;
uint32_t surface_id = 0;
pid_t pid = 0;
if (view->surface->resource) {
struct wl_resource *resource = view->surface->resource;
wl_client_get_credentials(wl_resource_get_client(resource),
&pid, NULL, NULL);
surface_id = wl_resource_get_id(view->surface->resource);
}
if (!view->surface->get_label ||
view->surface->get_label(view->surface, desc, sizeof(desc)) < 0) {
strcpy(desc, "[no description available]");
}
fprintf(fp, "\tView %d (role %s, PID %d, surface ID %u, %s, %p):\n",
view_idx, view->surface->role_name, pid, surface_id,
desc, view);
box = pixman_region32_extents(&view->transform.boundingbox);
fprintf(fp, "\t\tposition: (%d, %d) -> (%d, %d)\n",
box->x1, box->y1, box->x2, box->y2);
box = pixman_region32_extents(&view->transform.opaque);
if (pixman_region32_equal(&view->transform.opaque,
&view->transform.boundingbox)) {
fprintf(fp, "\t\t[fully opaque]\n");
} else if (!pixman_region32_not_empty(&view->transform.opaque)) {
fprintf(fp, "\t\t[not opaque]\n");
} else {
fprintf(fp, "\t\t[opaque: (%d, %d) -> (%d, %d)]\n",
box->x1, box->y1, box->x2, box->y2);
}
if (view->alpha < 1.0)
fprintf(fp, "\t\talpha: %f\n", view->alpha);
if (view->output_mask != 0) {
bool first_output = true;
fprintf(fp, "\t\toutputs: ");
wl_list_for_each(output, &ec->output_list, link) {
if (!(view->output_mask & (1 << output->id)))
continue;
fprintf(fp, "%s%d (%s)%s",
(first_output) ? "" : ", ",
output->id, output->name,
(view->output == output) ? " (primary)" : "");
first_output = false;
}
} else {
fprintf(fp, "\t\t[no outputs]");
}
fprintf(fp, "\n");
debug_scene_view_print_buffer(fp, view);
}
static void
debug_scene_view_print_tree(struct weston_view *view,
FILE *fp, int *view_idx)
{
struct weston_subsurface *sub;
struct weston_view *ev;
/*
* print the view first, then we recursively go on printing
* sub-surfaces. We bail out once no more sub-surfaces are available.
*/
debug_scene_view_print(fp, view, *view_idx);
/* no more sub-surfaces */
if (wl_list_empty(&view->surface->subsurface_list))
return;
wl_list_for_each(sub, &view->surface->subsurface_list, parent_link) {
wl_list_for_each(ev, &sub->surface->views, surface_link) {
/* do not print again the parent view */
if (view == ev)
continue;
(*view_idx)++;
debug_scene_view_print_tree(ev, fp, view_idx);
}
}
}
/**
* Output information on how libweston is currently composing the scene
* graph.
*/
WL_EXPORT char *
weston_compositor_print_scene_graph(struct weston_compositor *ec)
{
struct weston_output *output;
struct weston_layer *layer;
struct timespec now;
int layer_idx = 0;
FILE *fp;
char *ret;
size_t len;
int err;
fp = open_memstream(&ret, &len);
assert(fp);
weston_compositor_read_presentation_clock(ec, &now);
fprintf(fp, "Weston scene graph at %ld.%09ld:\n\n",
now.tv_sec, now.tv_nsec);
wl_list_for_each(output, &ec->output_list, link) {
struct weston_head *head;
int head_idx = 0;
fprintf(fp, "Output %d (%s):\n", output->id, output->name);
assert(output->enabled);
fprintf(fp, "\tposition: (%d, %d) -> (%d, %d)\n",
output->x, output->y,
output->x + output->width,
output->y + output->height);
fprintf(fp, "\tmode: %dx%d@%.3fHz\n",
output->current_mode->width,
output->current_mode->height,
output->current_mode->refresh / 1000.0);
fprintf(fp, "\tscale: %d\n", output->scale);
fprintf(fp, "\trepaint status: %s\n",
output_repaint_status_text(output));
if (output->repaint_status == REPAINT_SCHEDULED)
fprintf(fp, "\tnext repaint: %ld.%09ld\n",
output->next_repaint.tv_sec,
output->next_repaint.tv_nsec);
wl_list_for_each(head, &output->head_list, output_link) {
fprintf(fp, "\tHead %d (%s): %sconnected\n",
head_idx++, head->name,
(head->connected) ? "" : "not ");
}
}
fprintf(fp, "\n");
wl_list_for_each(layer, &ec->layer_list, link) {
struct weston_view *view;
int view_idx = 0;
fprintf(fp, "Layer %d (pos 0x%lx):\n", layer_idx++,
(unsigned long) layer->position);
if (!weston_layer_mask_is_infinite(layer)) {
fprintf(fp, "\t[mask: (%d, %d) -> (%d,%d)]\n\n",
layer->mask.x1, layer->mask.y1,
layer->mask.x2, layer->mask.y2);
}
wl_list_for_each(view, &layer->view_list.link, layer_link.link) {
debug_scene_view_print_tree(view, fp, &view_idx);
view_idx++;
}
if (wl_list_empty(&layer->view_list.link))
fprintf(fp, "\t[no views]\n");
fprintf(fp, "\n");
}
err = fclose(fp);
assert(err == 0);
return ret;
}
/**
* Called when the 'scene-graph' debug scope is bound by a client. This
* one-shot weston-debug scope prints the current scene graph when bound,
* and then terminates the stream.
*/
static void
debug_scene_graph_cb(struct weston_debug_stream *stream, void *data)
{
struct weston_compositor *ec = data;
char *str = weston_compositor_print_scene_graph(ec);
weston_debug_stream_printf(stream, "%s", str);
free(str);
weston_debug_stream_complete(stream);
}
/** Create the compositor.
*
* This functions creates and initializes a compositor instance.
*
* \param display The Wayland display to be used.
* \param user_data A pointer to an object that can later be retrieved
* \param wdc A pointer to weston_debug_compositor
* using the \ref weston_compositor_get_user_data function.
* \return The compositor instance on success or NULL on failure.
*/
WL_EXPORT struct weston_compositor *
weston_compositor_create(struct wl_display *display,
struct weston_log_context *log_ctx,
void *user_data)
{
struct weston_compositor *ec;
struct wl_event_loop *loop;
ec = zalloc(sizeof *ec);
if (!ec)
return NULL;
ec->wl_display = display;
ec->user_data = user_data;
wl_signal_init(&ec->destroy_signal);
wl_signal_init(&ec->create_surface_signal);
wl_signal_init(&ec->activate_signal);
wl_signal_init(&ec->transform_signal);
wl_signal_init(&ec->kill_signal);
wl_signal_init(&ec->idle_signal);
wl_signal_init(&ec->wake_signal);
wl_signal_init(&ec->show_input_panel_signal);
wl_signal_init(&ec->hide_input_panel_signal);
wl_signal_init(&ec->update_input_panel_signal);
wl_signal_init(&ec->seat_created_signal);
wl_signal_init(&ec->output_created_signal);
wl_signal_init(&ec->output_destroyed_signal);
wl_signal_init(&ec->output_moved_signal);
wl_signal_init(&ec->output_resized_signal);
wl_signal_init(&ec->heads_changed_signal);
wl_signal_init(&ec->output_heads_changed_signal);
wl_signal_init(&ec->session_signal);
ec->session_active = 1;
ec->output_id_pool = 0;
ec->repaint_msec = DEFAULT_REPAINT_WINDOW;
ec->activate_serial = 1;
ec->touch_mode = WESTON_TOUCH_MODE_NORMAL;
if (!wl_global_create(ec->wl_display, &wl_compositor_interface, 4,
ec, compositor_bind))
goto fail;
if (!wl_global_create(ec->wl_display, &wl_subcompositor_interface, 1,
ec, bind_subcompositor))
goto fail;
if (!wl_global_create(ec->wl_display, &wp_viewporter_interface, 1,
ec, bind_viewporter))
goto fail;
if (!wl_global_create(ec->wl_display, &wp_presentation_interface, 1,
ec, bind_presentation))
goto fail;
if (weston_log_ctx_compositor_setup(ec, log_ctx) < 0)
goto fail;
if (weston_input_init(ec) != 0)
goto fail;
wl_list_init(&ec->view_list);
wl_list_init(&ec->plane_list);
wl_list_init(&ec->layer_list);
wl_list_init(&ec->seat_list);
wl_list_init(&ec->pending_output_list);
wl_list_init(&ec->output_list);
wl_list_init(&ec->head_list);
wl_list_init(&ec->key_binding_list);
wl_list_init(&ec->modifier_binding_list);
wl_list_init(&ec->button_binding_list);
wl_list_init(&ec->touch_binding_list);
wl_list_init(&ec->axis_binding_list);
wl_list_init(&ec->debug_binding_list);
wl_list_init(&ec->plugin_api_list);
weston_plane_init(&ec->primary_plane, ec, 0, 0);
weston_compositor_stack_plane(ec, &ec->primary_plane, NULL);
wl_data_device_manager_init(ec->wl_display);
wl_display_init_shm(ec->wl_display);
loop = wl_display_get_event_loop(ec->wl_display);
ec->idle_source = wl_event_loop_add_timer(loop, idle_handler, ec);
ec->repaint_timer =
wl_event_loop_add_timer(loop, output_repaint_timer_handler,
ec);
weston_layer_init(&ec->fade_layer, ec);
weston_layer_init(&ec->cursor_layer, ec);
weston_layer_set_position(&ec->fade_layer, WESTON_LAYER_POSITION_FADE);
weston_layer_set_position(&ec->cursor_layer,
WESTON_LAYER_POSITION_CURSOR);
weston_compositor_add_debug_binding(ec, KEY_T,
timeline_key_binding_handler, ec);
ec->debug_scene =
weston_compositor_add_debug_scope(ec->weston_log_ctx, "scene-graph",
"Scene graph details\n",
debug_scene_graph_cb,
ec);
return ec;
fail:
free(ec);
return NULL;
}
WL_EXPORT void
weston_compositor_shutdown(struct weston_compositor *ec)
{
struct weston_output *output, *next;
wl_event_source_remove(ec->idle_source);
/* Destroy all outputs associated with this compositor */
wl_list_for_each_safe(output, next, &ec->output_list, link)
output->destroy(output);
/* Destroy all pending outputs associated with this compositor */
wl_list_for_each_safe(output, next, &ec->pending_output_list, link)
output->destroy(output);
if (ec->renderer)
ec->renderer->destroy(ec);
weston_binding_list_destroy_all(&ec->key_binding_list);
weston_binding_list_destroy_all(&ec->modifier_binding_list);
weston_binding_list_destroy_all(&ec->button_binding_list);
weston_binding_list_destroy_all(&ec->touch_binding_list);
weston_binding_list_destroy_all(&ec->axis_binding_list);
weston_binding_list_destroy_all(&ec->debug_binding_list);
weston_plane_release(&ec->primary_plane);
}
WL_EXPORT void
weston_compositor_exit_with_code(struct weston_compositor *compositor,
int exit_code)
{
if (compositor->exit_code == EXIT_SUCCESS)
compositor->exit_code = exit_code;
weston_compositor_exit(compositor);
}
WL_EXPORT void
weston_compositor_set_default_pointer_grab(struct weston_compositor *ec,
const struct weston_pointer_grab_interface *interface)
{
struct weston_seat *seat;
ec->default_pointer_grab = interface;
wl_list_for_each(seat, &ec->seat_list, link) {
struct weston_pointer *pointer = weston_seat_get_pointer(seat);
if (pointer)
weston_pointer_set_default_grab(pointer, interface);
}
}
WL_EXPORT int
weston_compositor_set_presentation_clock(struct weston_compositor *compositor,
clockid_t clk_id)
{
struct timespec ts;
if (clock_gettime(clk_id, &ts) < 0)
return -1;
compositor->presentation_clock = clk_id;
return 0;
}
/*
* For choosing the software clock, when the display hardware or API
* does not expose a compatible presentation timestamp.
*/
WL_EXPORT int
weston_compositor_set_presentation_clock_software(
struct weston_compositor *compositor)
{
/* In order of preference */
static const clockid_t clocks[] = {
CLOCK_MONOTONIC_RAW, /* no jumps, no crawling */
CLOCK_MONOTONIC_COARSE, /* no jumps, may crawl, fast & coarse */
CLOCK_MONOTONIC, /* no jumps, may crawl */
CLOCK_REALTIME_COARSE, /* may jump and crawl, fast & coarse */
CLOCK_REALTIME /* may jump and crawl */
};
unsigned i;
for (i = 0; i < ARRAY_LENGTH(clocks); i++)
if (weston_compositor_set_presentation_clock(compositor,
clocks[i]) == 0)
return 0;
weston_log("Error: no suitable presentation clock available.\n");
return -1;
}
/** Read the current time from the Presentation clock
*
* \param compositor
* \param ts[out] The current time.
*
* \note Reading the current time in user space is always imprecise to some
* degree.
*
* This function is never meant to fail. If reading the clock does fail,
* an error message is logged and a zero time is returned. Callers are not
* supposed to detect or react to failures.
*/
WL_EXPORT void
weston_compositor_read_presentation_clock(
const struct weston_compositor *compositor,
struct timespec *ts)
{
static bool warned;
int ret;
ret = clock_gettime(compositor->presentation_clock, ts);
if (ret < 0) {
ts->tv_sec = 0;
ts->tv_nsec = 0;
if (!warned)
weston_log("Error: failure to read "
"the presentation clock %#x: '%s' (%d)\n",
compositor->presentation_clock,
strerror(errno), errno);
warned = true;
}
}
/** Import dmabuf buffer into current renderer
*
* \param compositor
* \param buffer the dmabuf buffer to import
* \return true on usable buffers, false otherwise
*
* This function tests that the linux_dmabuf_buffer is usable
* for the current renderer. Returns false on unusable buffers. Usually
* usability is tested by importing the dmabufs for composition.
*
* This hook is also used for detecting if the renderer supports
* dmabufs at all. If the renderer hook is NULL, dmabufs are not
* supported.
* */
WL_EXPORT bool
weston_compositor_import_dmabuf(struct weston_compositor *compositor,
struct linux_dmabuf_buffer *buffer)
{
struct weston_renderer *renderer;
renderer = compositor->renderer;
if (renderer->import_dmabuf == NULL)
return false;
return renderer->import_dmabuf(compositor, buffer);
}
WL_EXPORT void
weston_version(int *major, int *minor, int *micro)
{
*major = WESTON_VERSION_MAJOR;
*minor = WESTON_VERSION_MINOR;
*micro = WESTON_VERSION_MICRO;
}
/**
* Attempts to find a module path from the module map specified in the
* environment. If found, writes the full path into the path variable.
*
* The module map is a string in environment variable WESTON_MODULE_MAP, where
* each entry is of the form "name=path" and entries are separated by
* semicolons. Whitespace is significant.
*
* \param name The name to search for.
* \param path Where the path is written to if found.
* \param path_len Allocated bytes at \c path .
* \returns The length of the string written to path on success, or 0 if the
* module was not specified in the environment map or path_len was too small.
*/
WL_EXPORT size_t
weston_module_path_from_env(const char *name, char *path, size_t path_len)
{
const char *mapping = getenv("WESTON_MODULE_MAP");
const char *end;
const int name_len = strlen(name);
if (!mapping)
return 0;
end = mapping + strlen(mapping);
while (mapping < end && *mapping) {
const char *filename, *next;
/* early out: impossibly short string */
if (end - mapping < name_len + 1)
return 0;
filename = &mapping[name_len + 1];
next = strchrnul(mapping, ';');
if (strncmp(mapping, name, name_len) == 0 &&
mapping[name_len] == '=') {
size_t file_len = next - filename; /* no trailing NUL */
if (file_len >= path_len)
return 0;
strncpy(path, filename, file_len);
path[file_len] = '\0';
return file_len;
}
mapping = next + 1;
}
return 0;
}
WL_EXPORT void *
weston_load_module(const char *name, const char *entrypoint)
{
char path[PATH_MAX];
void *module, *init;
size_t len;
if (name == NULL)
return NULL;
if (name[0] != '/') {
len = weston_module_path_from_env(name, path, sizeof path);
if (len == 0)
len = snprintf(path, sizeof path, "%s/%s",
LIBWESTON_MODULEDIR, name);
} else {
len = snprintf(path, sizeof path, "%s", name);
}
/* snprintf returns the length of the string it would've written,
* _excluding_ the NUL byte. So even being equal to the size of
* our buffer is an error here. */
if (len >= sizeof path)
return NULL;
module = dlopen(path, RTLD_NOW | RTLD_NOLOAD);
if (module) {
weston_log("Module '%s' already loaded\n", path);
dlclose(module);
return NULL;
}
weston_log("Loading module '%s'\n", path);
module = dlopen(path, RTLD_NOW);
if (!module) {
weston_log("Failed to load module: %s\n", dlerror());
return NULL;
}
init = dlsym(module, entrypoint);
if (!init) {
weston_log("Failed to lookup init function: %s\n", dlerror());
dlclose(module);
return NULL;
}
return init;
}
/** Destroys the compositor.
*
* This function cleans up the compositor state and destroys it.
*
* \param compositor The compositor to be destroyed.
*/
WL_EXPORT void
weston_compositor_destroy(struct weston_compositor *compositor)
{
/* prevent further rendering while shutting down */
compositor->state = WESTON_COMPOSITOR_OFFSCREEN;
wl_signal_emit(&compositor->destroy_signal, compositor);
weston_compositor_xkb_destroy(compositor);
if (compositor->backend)
compositor->backend->destroy(compositor);
/* The backend is responsible for destroying the heads. */
assert(wl_list_empty(&compositor->head_list));
weston_plugin_api_destroy_list(compositor);
if (compositor->heads_changed_source)
wl_event_source_remove(compositor->heads_changed_source);
weston_debug_scope_destroy(compositor->debug_scene);
compositor->debug_scene = NULL;
weston_log_ctx_compositor_destroy(compositor);
free(compositor);
}
/** Instruct the compositor to exit.
*
* This functions does not directly destroy the compositor object, it merely
* command it to start the tear down process. It is not guaranteed that the
* tear down will happen immediately.
*
* \param compositor The compositor to tear down.
*/
WL_EXPORT void
weston_compositor_exit(struct weston_compositor *compositor)
{
compositor->exit(compositor);
}
/** Return the user data stored in the compositor.
*
* This function returns the user data pointer set with user_data parameter
* to the \ref weston_compositor_create function.
*/
WL_EXPORT void *
weston_compositor_get_user_data(struct weston_compositor *compositor)
{
return compositor->user_data;
}
static const char * const backend_map[] = {
[WESTON_BACKEND_DRM] = "drm-backend.so",
[WESTON_BACKEND_FBDEV] = "fbdev-backend.so",
[WESTON_BACKEND_HEADLESS] = "headless-backend.so",
[WESTON_BACKEND_RDP] = "rdp-backend.so",
[WESTON_BACKEND_WAYLAND] = "wayland-backend.so",
[WESTON_BACKEND_X11] = "x11-backend.so",
};
/** Load a backend into a weston_compositor
*
* A backend must be loaded to make a weston_compositor work. A backend
* provides input and output capabilities, and determines the renderer to use.
*
* \param compositor A compositor that has not had a backend loaded yet.
* \param backend Name of the backend file.
* \param config_base A pointer to a backend-specific configuration
* structure's 'base' member.
*
* \return 0 on success, or -1 on error.
*/
WL_EXPORT int
weston_compositor_load_backend(struct weston_compositor *compositor,
enum weston_compositor_backend backend,
struct weston_backend_config *config_base)
{
int (*backend_init)(struct weston_compositor *c,
struct weston_backend_config *config_base);
if (compositor->backend) {
weston_log("Error: attempt to load a backend when one is already loaded\n");
return -1;
}
if (backend >= ARRAY_LENGTH(backend_map))
return -1;
backend_init = weston_load_module(backend_map[backend], "weston_backend_init");
if (!backend_init)
return -1;
if (backend_init(compositor, config_base) < 0) {
compositor->backend = NULL;
return -1;
}
return 0;
}
WL_EXPORT int
weston_compositor_load_xwayland(struct weston_compositor *compositor)
{
int (*module_init)(struct weston_compositor *ec);
module_init = weston_load_module("xwayland.so", "weston_module_init");
if (!module_init)
return -1;
if (module_init(compositor) < 0)
return -1;
return 0;
}
/** Resolve an internal compositor error by disconnecting the client.
*
* This function is used in cases when the wl_buffer turns out
* unusable and there is no fallback path.
*
* It is possible the fault is caused by a compositor bug, the underlying
* graphics stack bug or normal behaviour, or perhaps a client mistake.
* In any case, the options are to either composite garbage or nothing,
* or disconnect the client. This is a helper function for the latter.
*
* The error is sent as an INVALID_OBJECT error on the client's wl_display.
*
* \param buffer The weston buffer that is unusable.
* \param msg A custom error message attached to the protocol error.
*/
WL_EXPORT void
weston_buffer_send_server_error(struct weston_buffer *buffer,
const char *msg)
{
struct wl_client *client;
struct wl_resource *display_resource;
uint32_t id;
assert(buffer->resource);
id = wl_resource_get_id(buffer->resource);
client = wl_resource_get_client(buffer->resource);
display_resource = wl_client_get_object(client, 1);
assert(display_resource);
wl_resource_post_error(display_resource,
WL_DISPLAY_ERROR_INVALID_OBJECT,
"server error with "
"wl_buffer@%u: %s", id, msg);
}
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