mirrors/weston
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

compositor-drm: Move state helpers to separate file

Browse Source 
Most of the state helpers (create, destroy, duplicate, etc) state, are
relatively straightforward and can live in a separate file.

Signed-off-by: Daniel Stone <daniels@collabora.com>
This commit is contained in:
Daniel Stone 2019-06-18 11:30:54 +01:00
parent 7580b3c09e
commit 6b466f25af
4 changed files with 493 additions and 413 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

50
libweston/backend-drm/drm-internal.h
View File

@ -615,3 +615,53 @@ drm_fb_get_from_bo(struct gbm_bo *bo, struct drm_backend *backend,
bool is_opaque, enum drm_fb_type type);
struct drm_fb *
drm_fb_get_from_view(struct drm_output_state *state, struct weston_view *ev);
struct drm_pending_state *
drm_pending_state_alloc(struct drm_backend *backend);
void
drm_pending_state_free(struct drm_pending_state *pending_state);
struct drm_output_state *
drm_pending_state_get_output(struct drm_pending_state *pending_state,
struct drm_output *output);
/**
* Mode for drm_output_state_duplicate.
*/
enum drm_output_state_duplicate_mode {
DRM_OUTPUT_STATE_CLEAR_PLANES, /**< reset all planes to off */
DRM_OUTPUT_STATE_PRESERVE_PLANES, /**< preserve plane state */
};
struct drm_output_state *
drm_output_state_alloc(struct drm_output *output,
struct drm_pending_state *pending_state);
struct drm_output_state *
drm_output_state_duplicate(struct drm_output_state *src,
struct drm_pending_state *pending_state,
enum drm_output_state_duplicate_mode plane_mode);
void
drm_output_state_free(struct drm_output_state *state);
struct drm_plane_state *
drm_output_state_get_plane(struct drm_output_state *state_output,
struct drm_plane *plane);
struct drm_plane_state *
drm_output_state_get_existing_plane(struct drm_output_state *state_output,
struct drm_plane *plane);
struct drm_plane_state *
drm_plane_state_alloc(struct drm_output_state *state_output,
struct drm_plane *plane);
struct drm_plane_state *
drm_plane_state_duplicate(struct drm_output_state *state_output,
struct drm_plane_state *src);
void
drm_plane_state_free(struct drm_plane_state *state, bool force);
void
drm_plane_state_put_back(struct drm_plane_state *state);
bool
drm_plane_state_coords_for_view(struct drm_plane_state *state,
struct weston_view *ev);

413
libweston/backend-drm/drm.c
View File

@ -69,14 +69,6 @@
#include "linux-dmabuf-unstable-v1-server-protocol.h"
#include "linux-explicit-synchronization.h"
/**
* Mode for drm_output_state_duplicate.
*/
enum drm_output_state_duplicate_mode {
DRM_OUTPUT_STATE_CLEAR_PLANES, /**< reset all planes to off */
DRM_OUTPUT_STATE_PRESERVE_PLANES, /**< preserve plane state */
};
enum drm_output_propose_state_mode {
DRM_OUTPUT_PROPOSE_STATE_MIXED, /**< mix renderer & planes */
DRM_OUTPUT_PROPOSE_STATE_RENDERER_ONLY, /**< only assign to renderer & cursor */
@ -213,340 +205,6 @@ drm_head_find_by_connector(struct drm_backend *backend, uint32_t connector_id)
return NULL;
}
/**
* Allocate a new, empty, plane state.
*/
static struct drm_plane_state *
drm_plane_state_alloc(struct drm_output_state *state_output,
struct drm_plane *plane)
{
struct drm_plane_state *state = zalloc(sizeof(*state));
assert(state);
state->output_state = state_output;
state->plane = plane;
state->in_fence_fd = -1;
pixman_region32_init(&state->damage);
/* Here we only add the plane state to the desired link, and not
* set the member. Having an output pointer set means that the
* plane will be displayed on the output; this won't be the case
* when we go to disable a plane. In this case, it must be part of
* the commit (and thus the output state), but the member must be
* NULL, as it will not be on any output when the state takes
* effect.
*/
if (state_output)
wl_list_insert(&state_output->plane_list, &state->link);
else
wl_list_init(&state->link);
return state;
}
/**
* Free an existing plane state. As a special case, the state will not
* normally be freed if it is the current state; see drm_plane_set_state.
*/
void
drm_plane_state_free(struct drm_plane_state *state, bool force)
{
if (!state)
return;
wl_list_remove(&state->link);
wl_list_init(&state->link);
state->output_state = NULL;
state->in_fence_fd = -1;
pixman_region32_fini(&state->damage);
if (force || state != state->plane->state_cur) {
drm_fb_unref(state->fb);
free(state);
}
}
/**
* Duplicate an existing plane state into a new plane state, storing it within
* the given output state. If the output state already contains a plane state
* for the drm_plane referenced by 'src', that plane state is freed first.
*/
static struct drm_plane_state *
drm_plane_state_duplicate(struct drm_output_state *state_output,
struct drm_plane_state *src)
{
struct drm_plane_state *dst = malloc(sizeof(*dst));
struct drm_plane_state *old, *tmp;
assert(src);
assert(dst);
*dst = *src;
wl_list_init(&dst->link);
wl_list_for_each_safe(old, tmp, &state_output->plane_list, link) {
/* Duplicating a plane state into the same output state, so
* it can replace itself with an identical copy of itself,
* makes no sense. */
assert(old != src);
if (old->plane == dst->plane)
drm_plane_state_free(old, false);
}
wl_list_insert(&state_output->plane_list, &dst->link);
if (src->fb)
dst->fb = drm_fb_ref(src->fb);
dst->output_state = state_output;
pixman_region32_init(&dst->damage);
dst->complete = false;
return dst;
}
/**
* Remove a plane state from an output state; if the plane was previously
* enabled, then replace it with a disabling state. This ensures that the
* output state was untouched from it was before the plane state was
* modified by the caller of this function.
*
* This is required as drm_output_state_get_plane may either allocate a
* new plane state, in which case this function will just perform a matching
* drm_plane_state_free, or it may instead repurpose an existing disabling
* state (if the plane was previously active), in which case this function
* will reset it.
*/
static void
drm_plane_state_put_back(struct drm_plane_state *state)
{
struct drm_output_state *state_output;
struct drm_plane *plane;
if (!state)
return;
state_output = state->output_state;
plane = state->plane;
drm_plane_state_free(state, false);
/* Plane was previously disabled; no need to keep this temporary
* state around. */
if (!plane->state_cur->fb)
return;
(void) drm_plane_state_alloc(state_output, plane);
}
/**
* Given a weston_view, fill the drm_plane_state's co-ordinates to display on
* a given plane.
*/
static bool
drm_plane_state_coords_for_view(struct drm_plane_state *state,
struct weston_view *ev)
{
struct drm_output *output = state->output;
struct weston_buffer *buffer = ev->surface->buffer_ref.buffer;
pixman_region32_t dest_rect, src_rect;
pixman_box32_t *box, tbox;
float sxf1, syf1, sxf2, syf2;
if (!drm_view_transform_supported(ev, &output->base))
return false;
/* Update the base weston_plane co-ordinates. */
box = pixman_region32_extents(&ev->transform.boundingbox);
state->plane->base.x = box->x1;
state->plane->base.y = box->y1;
/* First calculate the destination co-ordinates by taking the
* area of the view which is visible on this output, performing any
* transforms to account for output rotation and scale as necessary. */
pixman_region32_init(&dest_rect);
pixman_region32_intersect(&dest_rect, &ev->transform.boundingbox,
&output->base.region);
pixman_region32_translate(&dest_rect, -output->base.x, -output->base.y);
box = pixman_region32_extents(&dest_rect);
tbox = weston_transformed_rect(output->base.width,
output->base.height,
output->base.transform,
output->base.current_scale,
*box);
state->dest_x = tbox.x1;
state->dest_y = tbox.y1;
state->dest_w = tbox.x2 - tbox.x1;
state->dest_h = tbox.y2 - tbox.y1;
pixman_region32_fini(&dest_rect);
/* Now calculate the source rectangle, by finding the extents of the
* view, and working backwards to source co-ordinates. */
pixman_region32_init(&src_rect);
pixman_region32_intersect(&src_rect, &ev->transform.boundingbox,
&output->base.region);
box = pixman_region32_extents(&src_rect);
weston_view_from_global_float(ev, box->x1, box->y1, &sxf1, &syf1);
weston_surface_to_buffer_float(ev->surface, sxf1, syf1, &sxf1, &syf1);
weston_view_from_global_float(ev, box->x2, box->y2, &sxf2, &syf2);
weston_surface_to_buffer_float(ev->surface, sxf2, syf2, &sxf2, &syf2);
pixman_region32_fini(&src_rect);
/* Buffer transforms may mean that x2 is to the left of x1, and/or that
* y2 is above y1. */
if (sxf2 < sxf1) {
double tmp = sxf1;
sxf1 = sxf2;
sxf2 = tmp;
}
if (syf2 < syf1) {
double tmp = syf1;
syf1 = syf2;
syf2 = tmp;
}
/* Shift from S23.8 wl_fixed to U16.16 KMS fixed-point encoding. */
state->src_x = wl_fixed_from_double(sxf1) << 8;
state->src_y = wl_fixed_from_double(syf1) << 8;
state->src_w = wl_fixed_from_double(sxf2 - sxf1) << 8;
state->src_h = wl_fixed_from_double(syf2 - syf1) << 8;
/* Clamp our source co-ordinates to surface bounds; it's possible
* for intermediate translations to give us slightly incorrect
* co-ordinates if we have, for example, multiple zooming
* transformations. View bounding boxes are also explicitly rounded
* greedily. */
if (state->src_x < 0)
state->src_x = 0;
if (state->src_y < 0)
state->src_y = 0;
if (state->src_w > (uint32_t) ((buffer->width << 16) - state->src_x))
state->src_w = (buffer->width << 16) - state->src_x;
if (state->src_h > (uint32_t) ((buffer->height << 16) - state->src_y))
state->src_h = (buffer->height << 16) - state->src_y;
return true;
}
/**
* Return a plane state from a drm_output_state.
*/
struct drm_plane_state *
drm_output_state_get_existing_plane(struct drm_output_state *state_output,
struct drm_plane *plane)
{
struct drm_plane_state *ps;
wl_list_for_each(ps, &state_output->plane_list, link) {
if (ps->plane == plane)
return ps;
}
return NULL;
}
/**
* Return a plane state from a drm_output_state, either existing or
* freshly allocated.
*/
static struct drm_plane_state *
drm_output_state_get_plane(struct drm_output_state *state_output,
struct drm_plane *plane)
{
struct drm_plane_state *ps;
ps = drm_output_state_get_existing_plane(state_output, plane);
if (ps)
return ps;
return drm_plane_state_alloc(state_output, plane);
}
/**
* Allocate a new, empty drm_output_state. This should not generally be used
* in the repaint cycle; see drm_output_state_duplicate.
*/
static struct drm_output_state *
drm_output_state_alloc(struct drm_output *output,
struct drm_pending_state *pending_state)
{
struct drm_output_state *state = zalloc(sizeof(*state));
assert(state);
state->output = output;
state->dpms = WESTON_DPMS_OFF;
state->pending_state = pending_state;
if (pending_state)
wl_list_insert(&pending_state->output_list, &state->link);
else
wl_list_init(&state->link);
wl_list_init(&state->plane_list);
return state;
}
/**
* Duplicate an existing drm_output_state into a new one. This is generally
* used during the repaint cycle, to capture the existing state of an output
* and modify it to create a new state to be used.
*
* The mode determines whether the output will be reset to an a blank state,
* or an exact mirror of the current state.
*/
static struct drm_output_state *
drm_output_state_duplicate(struct drm_output_state *src,
struct drm_pending_state *pending_state,
enum drm_output_state_duplicate_mode plane_mode)
{
struct drm_output_state *dst = malloc(sizeof(*dst));
struct drm_plane_state *ps;
assert(dst);
/* Copy the whole structure, then individually modify the
* pending_state, as well as the list link into our pending
* state. */
*dst = *src;
dst->pending_state = pending_state;
if (pending_state)
wl_list_insert(&pending_state->output_list, &dst->link);
else
wl_list_init(&dst->link);
wl_list_init(&dst->plane_list);
wl_list_for_each(ps, &src->plane_list, link) {
/* Don't carry planes which are now disabled; these should be
* free for other outputs to reuse. */
if (!ps->output)
continue;
if (plane_mode == DRM_OUTPUT_STATE_CLEAR_PLANES)
(void) drm_plane_state_alloc(dst, ps->plane);
else
(void) drm_plane_state_duplicate(dst, ps);
}
return dst;
}
/**
* Free an unused drm_output_state.
*/
void
drm_output_state_free(struct drm_output_state *state)
{
struct drm_plane_state *ps, *next;
if (!state)
return;
wl_list_for_each_safe(ps, next, &state->plane_list, link)
drm_plane_state_free(ps, false);
wl_list_remove(&state->link);
free(state);
}
/**
* Get output state to disable output
*
@ -571,77 +229,6 @@ drm_output_get_disable_state(struct drm_pending_state *pending_state,
return output_state;
}
/**
* Allocate a new drm_pending_state
*
* Allocate a new, empty, 'pending state' structure to be used across a
* repaint cycle or similar.
*
* @param backend DRM backend
* @returns Newly-allocated pending state structure
*/
static struct drm_pending_state *
drm_pending_state_alloc(struct drm_backend *backend)
{
struct drm_pending_state *ret;
ret = calloc(1, sizeof(*ret));
if (!ret)
return NULL;
ret->backend = backend;
wl_list_init(&ret->output_list);
return ret;
}
/**
* Free a drm_pending_state structure
*
* Frees a pending_state structure, as well as any output_states connected
* to this pending state.
*
* @param pending_state Pending state structure to free
*/
void
drm_pending_state_free(struct drm_pending_state *pending_state)
{
struct drm_output_state *output_state, *tmp;
if (!pending_state)
return;
wl_list_for_each_safe(output_state, tmp, &pending_state->output_list,
link) {
drm_output_state_free(output_state);
}
free(pending_state);
}
/**
* Find an output state in a pending state
*
* Given a pending_state structure, find the output_state for a particular
* output.
*
* @param pending_state Pending state structure to search
* @param output Output to find state for
* @returns Output state if present, or NULL if not
*/
static struct drm_output_state *
drm_pending_state_get_output(struct drm_pending_state *pending_state,
struct drm_output *output)
{
struct drm_output_state *output_state;
wl_list_for_each(output_state, &pending_state->output_list, link) {
if (output_state->output == output)
return output_state;
}
return NULL;
}
/**
* Mark a drm_output_state (the output's last state) as complete. This handles

1
libweston/backend-drm/meson.build
View File

@ -24,6 +24,7 @@ srcs_drm = [
'fb.c',
'modes.c',
'kms.c',
'state-helpers.c',
linux_dmabuf_unstable_v1_protocol_c,
linux_dmabuf_unstable_v1_server_protocol_h,
presentation_time_server_protocol_h,

442
libweston/backend-drm/state-helpers.c Normal file
View File

@ -0,0 +1,442 @@
/*
* Copyright © 2008-2011 Kristian Høgsberg
* Copyright © 2011 Intel Corporation
* Copyright © 2017, 2018 Collabora, Ltd.
* Copyright © 2017, 2018 General Electric Company
* Copyright (c) 2018 DisplayLink (UK) Ltd.
*
* 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 <xf86drm.h>
#include <xf86drmMode.h>
#include <drm_fourcc.h>
#include "drm-internal.h"
/**
* Allocate a new, empty, plane state.
*/
struct drm_plane_state *
drm_plane_state_alloc(struct drm_output_state *state_output,
struct drm_plane *plane)
{
struct drm_plane_state *state = zalloc(sizeof(*state));
assert(state);
state->output_state = state_output;
state->plane = plane;
state->in_fence_fd = -1;
pixman_region32_init(&state->damage);
/* Here we only add the plane state to the desired link, and not
* set the member. Having an output pointer set means that the
* plane will be displayed on the output; this won't be the case
* when we go to disable a plane. In this case, it must be part of
* the commit (and thus the output state), but the member must be
* NULL, as it will not be on any output when the state takes
* effect.
*/
if (state_output)
wl_list_insert(&state_output->plane_list, &state->link);
else
wl_list_init(&state->link);
return state;
}
/**
* Free an existing plane state. As a special case, the state will not
* normally be freed if it is the current state; see drm_plane_set_state.
*/
void
drm_plane_state_free(struct drm_plane_state *state, bool force)
{
if (!state)
return;
wl_list_remove(&state->link);
wl_list_init(&state->link);
state->output_state = NULL;
state->in_fence_fd = -1;
pixman_region32_fini(&state->damage);
if (force || state != state->plane->state_cur) {
drm_fb_unref(state->fb);
free(state);
}
}
/**
* Duplicate an existing plane state into a new plane state, storing it within
* the given output state. If the output state already contains a plane state
* for the drm_plane referenced by 'src', that plane state is freed first.
*/
struct drm_plane_state *
drm_plane_state_duplicate(struct drm_output_state *state_output,
struct drm_plane_state *src)
{
struct drm_plane_state *dst = malloc(sizeof(*dst));
struct drm_plane_state *old, *tmp;
assert(src);
assert(dst);
*dst = *src;
wl_list_init(&dst->link);
wl_list_for_each_safe(old, tmp, &state_output->plane_list, link) {
/* Duplicating a plane state into the same output state, so
* it can replace itself with an identical copy of itself,
* makes no sense. */
assert(old != src);
if (old->plane == dst->plane)
drm_plane_state_free(old, false);
}
wl_list_insert(&state_output->plane_list, &dst->link);
if (src->fb)
dst->fb = drm_fb_ref(src->fb);
dst->output_state = state_output;
pixman_region32_init(&dst->damage);
dst->complete = false;
return dst;
}
/**
* Remove a plane state from an output state; if the plane was previously
* enabled, then replace it with a disabling state. This ensures that the
* output state was untouched from it was before the plane state was
* modified by the caller of this function.
*
* This is required as drm_output_state_get_plane may either allocate a
* new plane state, in which case this function will just perform a matching
* drm_plane_state_free, or it may instead repurpose an existing disabling
* state (if the plane was previously active), in which case this function
* will reset it.
*/
void
drm_plane_state_put_back(struct drm_plane_state *state)
{
struct drm_output_state *state_output;
struct drm_plane *plane;
if (!state)
return;
state_output = state->output_state;
plane = state->plane;
drm_plane_state_free(state, false);
/* Plane was previously disabled; no need to keep this temporary
* state around. */
if (!plane->state_cur->fb)
return;
(void) drm_plane_state_alloc(state_output, plane);
}
/**
* Given a weston_view, fill the drm_plane_state's co-ordinates to display on
* a given plane.
*/
bool
drm_plane_state_coords_for_view(struct drm_plane_state *state,
struct weston_view *ev)
{
struct drm_output *output = state->output;
struct weston_buffer *buffer = ev->surface->buffer_ref.buffer;
pixman_region32_t dest_rect, src_rect;
pixman_box32_t *box, tbox;
float sxf1, syf1, sxf2, syf2;
if (!drm_view_transform_supported(ev, &output->base))
return false;
/* Update the base weston_plane co-ordinates. */
box = pixman_region32_extents(&ev->transform.boundingbox);
state->plane->base.x = box->x1;
state->plane->base.y = box->y1;
/* First calculate the destination co-ordinates by taking the
* area of the view which is visible on this output, performing any
* transforms to account for output rotation and scale as necessary. */
pixman_region32_init(&dest_rect);
pixman_region32_intersect(&dest_rect, &ev->transform.boundingbox,
&output->base.region);
pixman_region32_translate(&dest_rect, -output->base.x, -output->base.y);
box = pixman_region32_extents(&dest_rect);
tbox = weston_transformed_rect(output->base.width,
output->base.height,
output->base.transform,
output->base.current_scale,
*box);
state->dest_x = tbox.x1;
state->dest_y = tbox.y1;
state->dest_w = tbox.x2 - tbox.x1;
state->dest_h = tbox.y2 - tbox.y1;
pixman_region32_fini(&dest_rect);
/* Now calculate the source rectangle, by finding the extents of the
* view, and working backwards to source co-ordinates. */
pixman_region32_init(&src_rect);
pixman_region32_intersect(&src_rect, &ev->transform.boundingbox,
&output->base.region);
box = pixman_region32_extents(&src_rect);
weston_view_from_global_float(ev, box->x1, box->y1, &sxf1, &syf1);
weston_surface_to_buffer_float(ev->surface, sxf1, syf1, &sxf1, &syf1);
weston_view_from_global_float(ev, box->x2, box->y2, &sxf2, &syf2);
weston_surface_to_buffer_float(ev->surface, sxf2, syf2, &sxf2, &syf2);
pixman_region32_fini(&src_rect);
/* Buffer transforms may mean that x2 is to the left of x1, and/or that
* y2 is above y1. */
if (sxf2 < sxf1) {
double tmp = sxf1;
sxf1 = sxf2;
sxf2 = tmp;
}
if (syf2 < syf1) {
double tmp = syf1;
syf1 = syf2;
syf2 = tmp;
}
/* Shift from S23.8 wl_fixed to U16.16 KMS fixed-point encoding. */
state->src_x = wl_fixed_from_double(sxf1) << 8;
state->src_y = wl_fixed_from_double(syf1) << 8;
state->src_w = wl_fixed_from_double(sxf2 - sxf1) << 8;
state->src_h = wl_fixed_from_double(syf2 - syf1) << 8;
/* Clamp our source co-ordinates to surface bounds; it's possible
* for intermediate translations to give us slightly incorrect
* co-ordinates if we have, for example, multiple zooming
* transformations. View bounding boxes are also explicitly rounded
* greedily. */
if (state->src_x < 0)
state->src_x = 0;
if (state->src_y < 0)
state->src_y = 0;
if (state->src_w > (uint32_t) ((buffer->width << 16) - state->src_x))
state->src_w = (buffer->width << 16) - state->src_x;
if (state->src_h > (uint32_t) ((buffer->height << 16) - state->src_y))
state->src_h = (buffer->height << 16) - state->src_y;
return true;
}
/**
* Return a plane state from a drm_output_state.
*/
struct drm_plane_state *
drm_output_state_get_existing_plane(struct drm_output_state *state_output,
struct drm_plane *plane)
{
struct drm_plane_state *ps;
wl_list_for_each(ps, &state_output->plane_list, link) {
if (ps->plane == plane)
return ps;
}
return NULL;
}
/**
* Return a plane state from a drm_output_state, either existing or
* freshly allocated.
*/
struct drm_plane_state *
drm_output_state_get_plane(struct drm_output_state *state_output,
struct drm_plane *plane)
{
struct drm_plane_state *ps;
ps = drm_output_state_get_existing_plane(state_output, plane);
if (ps)
return ps;
return drm_plane_state_alloc(state_output, plane);
}
/**
* Allocate a new, empty drm_output_state. This should not generally be used
* in the repaint cycle; see drm_output_state_duplicate.
*/
struct drm_output_state *
drm_output_state_alloc(struct drm_output *output,
struct drm_pending_state *pending_state)
{
struct drm_output_state *state = zalloc(sizeof(*state));
assert(state);
state->output = output;
state->dpms = WESTON_DPMS_OFF;
state->pending_state = pending_state;
if (pending_state)
wl_list_insert(&pending_state->output_list, &state->link);
else
wl_list_init(&state->link);
wl_list_init(&state->plane_list);
return state;
}
/**
* Duplicate an existing drm_output_state into a new one. This is generally
* used during the repaint cycle, to capture the existing state of an output
* and modify it to create a new state to be used.
*
* The mode determines whether the output will be reset to an a blank state,
* or an exact mirror of the current state.
*/
struct drm_output_state *
drm_output_state_duplicate(struct drm_output_state *src,
struct drm_pending_state *pending_state,
enum drm_output_state_duplicate_mode plane_mode)
{
struct drm_output_state *dst = malloc(sizeof(*dst));
struct drm_plane_state *ps;
assert(dst);
/* Copy the whole structure, then individually modify the
* pending_state, as well as the list link into our pending
* state. */
*dst = *src;
dst->pending_state = pending_state;
if (pending_state)
wl_list_insert(&pending_state->output_list, &dst->link);
else
wl_list_init(&dst->link);
wl_list_init(&dst->plane_list);
wl_list_for_each(ps, &src->plane_list, link) {
/* Don't carry planes which are now disabled; these should be
* free for other outputs to reuse. */
if (!ps->output)
continue;
if (plane_mode == DRM_OUTPUT_STATE_CLEAR_PLANES)
(void) drm_plane_state_alloc(dst, ps->plane);
else
(void) drm_plane_state_duplicate(dst, ps);
}
return dst;
}
/**
* Free an unused drm_output_state.
*/
void
drm_output_state_free(struct drm_output_state *state)
{
struct drm_plane_state *ps, *next;
if (!state)
return;
wl_list_for_each_safe(ps, next, &state->plane_list, link)
drm_plane_state_free(ps, false);
wl_list_remove(&state->link);
free(state);
}
/**
* Allocate a new drm_pending_state
*
* Allocate a new, empty, 'pending state' structure to be used across a
* repaint cycle or similar.
*
* @param backend DRM backend
* @returns Newly-allocated pending state structure
*/
struct drm_pending_state *
drm_pending_state_alloc(struct drm_backend *backend)
{
struct drm_pending_state *ret;
ret = calloc(1, sizeof(*ret));
if (!ret)
return NULL;
ret->backend = backend;
wl_list_init(&ret->output_list);
return ret;
}
/**
* Free a drm_pending_state structure
*
* Frees a pending_state structure, as well as any output_states connected
* to this pending state.
*
* @param pending_state Pending state structure to free
*/
void
drm_pending_state_free(struct drm_pending_state *pending_state)
{
struct drm_output_state *output_state, *tmp;
if (!pending_state)
return;
wl_list_for_each_safe(output_state, tmp, &pending_state->output_list,
link) {
drm_output_state_free(output_state);
}
free(pending_state);
}
/**
* Find an output state in a pending state
*
* Given a pending_state structure, find the output_state for a particular
* output.
*
* @param pending_state Pending state structure to search
* @param output Output to find state for
* @returns Output state if present, or NULL if not
*/
struct drm_output_state *
drm_pending_state_get_output(struct drm_pending_state *pending_state,
struct drm_output *output)
{
struct drm_output_state *output_state;
wl_list_for_each(output_state, &pending_state->output_list, link) {
if (output_state->output == output)
return output_state;
}
return NULL;
}