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weston/clients/simple-dmabuf-feedback.c

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/*
* Copyright © 2020 Collabora, 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 <assert.h>
#include <ctype.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <libudev.h>
#include <sys/mman.h>
#include <time.h>
#include "shared/helpers.h"
#include "shared/platform.h"
#include "shared/weston-drm-fourcc.h"
#include <libweston/zalloc.h>
#include <libweston/pixel-formats.h>
#include "xdg-shell-client-protocol.h"
#include "linux-dmabuf-unstable-v1-client-protocol.h"
#include "presentation-time-client-protocol.h"
#include <xf86drm.h>
#include <gbm.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#define L_LINE "│ "
#define L_VAL "├───"
#define L_LAST "└───"
#define L_GAP " "
#define NUM_BUFFERS 4
/* We have to hack the DRM-backend to pretend that planes of the underlying
* hardware don't support this format. If you change the value of this constant,
* do not forget to change in the DRM-backend as well. See main() description
* for more details. */
#define INITIAL_BUFFER_FORMAT DRM_FORMAT_XRGB8888
static const char *vert_shader_text =
"attribute vec4 pos;\n"
"attribute vec4 color;\n"
"varying vec4 v_color;\n"
"void main() {\n"
" // We need to render upside-down, because rendering through an\n"
" // FBO causes the bottom of the image to be written to the top\n"
" // pixel row of the buffer, y-flipping the image.\n"
" gl_Position = vec4(1.0, -1.0, 1.0, 1.0) * pos;\n"
" v_color = color;\n"
"}\n";
static const char *frag_shader_text =
"precision mediump float;\n"
"varying vec4 v_color;\n"
"void main() {\n"
" gl_FragColor = v_color;\n"
"}\n";
struct drm_format {
uint32_t format;
struct wl_array modifiers;
};
struct drm_format_array {
struct wl_array arr;
};
struct dmabuf_feedback_format_table {
unsigned int size;
struct {
uint32_t format;
uint32_t padding; /* unused */
uint64_t modifier;
} *data;
};
struct dmabuf_feedback_tranche {
dev_t target_device;
bool is_scanout_tranche;
struct drm_format_array formats;
};
struct dmabuf_feedback {
dev_t main_device;
struct dmabuf_feedback_format_table format_table;
struct wl_array tranches;
struct dmabuf_feedback_tranche pending_tranche;
};
struct output {
struct wl_output *wl_output;
int x, y;
int width, height;
int scale;
bool initialized;
struct {
int width, height;
} configure;
};
struct egl {
EGLDisplay display;
EGLContext context;
EGLConfig conf;
PFNEGLQUERYDMABUFMODIFIERSEXTPROC query_dmabuf_modifiers;
PFNEGLCREATEIMAGEKHRPROC create_image;
PFNEGLDESTROYIMAGEKHRPROC destroy_image;
PFNGLEGLIMAGETARGETTEXTURE2DOESPROC image_target_texture_2d;
};
struct gl {
GLuint program;
GLuint pos;
GLuint color;
};
struct display {
struct wl_display *display;
struct wl_registry *registry;
struct wl_compositor *compositor;
struct output output;
struct xdg_wm_base *wm_base;
struct zwp_linux_dmabuf_v1 *dmabuf;
struct wp_presentation *presentation;
struct gbm_device *gbm_device;
struct egl egl;
};
struct buffer {
bool created;
bool valid;
struct window *window;
struct wl_buffer *buffer;
enum {
NOT_CREATED,
IN_USE,
AVAILABLE
} status;
int dmabuf_fds[4];
struct gbm_bo *bo;
EGLImageKHR egl_image;
GLuint gl_texture;
GLuint gl_fbo;
int num_planes;
uint32_t width, height, strides[4], offsets[4];
uint32_t format;
uint64_t modifier;
};
struct window {
struct display *display;
struct gl gl;
struct wl_surface *surface;
struct xdg_surface *xdg_surface;
struct xdg_toplevel *xdg_toplevel;
struct wl_callback *callback;
struct wp_presentation_feedback *presentation_feedback;
bool wait_for_configure;
bool presented_zero_copy;
struct zwp_linux_dmabuf_feedback_v1 *dmabuf_feedback_obj;
struct dmabuf_feedback dmabuf_feedback, pending_dmabuf_feedback;
int card_fd;
struct drm_format format;
uint32_t bo_flags;
struct buffer buffers[NUM_BUFFERS];
};
static void
drm_format_array_init(struct drm_format_array *formats)
{
wl_array_init(&formats->arr);
}
static void
drm_format_array_fini(struct drm_format_array *formats)
{
struct drm_format *fmt;
wl_array_for_each(fmt, &formats->arr)
wl_array_release(&fmt->modifiers);
wl_array_release(&formats->arr);
}
static struct drm_format *
drm_format_array_add_format(struct drm_format_array *formats, uint32_t format)
{
struct drm_format *fmt;
wl_array_for_each(fmt, &formats->arr)
if (fmt->format == format)
return fmt;
fmt = wl_array_add(&formats->arr, sizeof(*fmt));
assert(fmt && "error: could not allocate memory for format");
fmt->format = format;
wl_array_init(&fmt->modifiers);
return fmt;
}
static void
drm_format_add_modifier(struct drm_format *format, uint64_t modifier)
{
uint64_t *mod;
wl_array_for_each(mod, &format->modifiers)
if (*mod == modifier)
return;
mod = wl_array_add(&format->modifiers, sizeof(uint64_t));
assert(mod && "error: could not allocate memory for modifier");
*mod = modifier;
}
static void
dmabuf_feedback_format_table_fini(struct dmabuf_feedback_format_table *format_table)
{
if (format_table->data && format_table->data != MAP_FAILED)
munmap(format_table->data, format_table->size);
}
static void
dmabuf_feedback_format_table_init(struct dmabuf_feedback_format_table *format_table)
{
memset(format_table, 0, sizeof(*format_table));
}
static void
dmabuf_feedback_tranche_fini(struct dmabuf_feedback_tranche *tranche)
{
drm_format_array_fini(&tranche->formats);
}
static void
dmabuf_feedback_tranche_init(struct dmabuf_feedback_tranche *tranche)
{
memset(tranche, 0, sizeof(*tranche));
drm_format_array_init(&tranche->formats);
}
static void
dmabuf_feedback_fini(struct dmabuf_feedback *feedback)
{
struct dmabuf_feedback_tranche *tranche;
dmabuf_feedback_tranche_fini(&feedback->pending_tranche);
wl_array_for_each(tranche, &feedback->tranches)
dmabuf_feedback_tranche_fini(tranche);
dmabuf_feedback_format_table_fini(&feedback->format_table);
}
static void
dmabuf_feedback_init(struct dmabuf_feedback *feedback)
{
memset(feedback, 0, sizeof(*feedback));
dmabuf_feedback_tranche_init(&feedback->pending_tranche);
wl_array_init(&feedback->tranches);
dmabuf_feedback_format_table_init(&feedback->format_table);
}
static GLuint
create_shader(const char *source, GLenum shader_type)
{
GLuint shader;
GLint status;
shader = glCreateShader(shader_type);
assert(shader != 0);
glShaderSource(shader, 1, (const char **) &source, NULL);
glCompileShader(shader);
glGetShaderiv(shader, GL_COMPILE_STATUS, &status);
if (!status) {
char log[1000];
GLsizei len;
glGetShaderInfoLog(shader, 1000, &len, log);
fprintf(stderr, "error: compiling %s: %.*s\n",
shader_type == GL_VERTEX_SHADER ? "vertex" : "fragment",
len, log);
return 0;
}
return shader;
}
static GLuint
create_and_link_program(GLuint vert, GLuint frag)
{
GLint status;
GLuint program = glCreateProgram();
glAttachShader(program, vert);
glAttachShader(program, frag);
glLinkProgram(program);
glGetProgramiv(program, GL_LINK_STATUS, &status);
if (!status) {
char log[1000];
GLsizei len;
glGetProgramInfoLog(program, 1000, &len, log);
fprintf(stderr, "error: linking:\n%.*s\n", len, log);
return 0;
}
return program;
}
static void
create_fbo_for_buffer(struct buffer *buffer)
{
struct display *display = buffer->window->display;
static const int general_attribs = 3;
static const int plane_attribs = 5;
static const int entries_per_attrib = 2;
EGLint attribs[(general_attribs + (plane_attribs * 4)) * entries_per_attrib + 1];
unsigned int atti = 0;
attribs[atti++] = EGL_WIDTH;
attribs[atti++] = buffer->width;
attribs[atti++] = EGL_HEIGHT;
attribs[atti++] = buffer->height;
attribs[atti++] = EGL_LINUX_DRM_FOURCC_EXT;
attribs[atti++] = buffer->format;
attribs[atti++] = EGL_DMA_BUF_PLANE0_FD_EXT;
attribs[atti++] = buffer->dmabuf_fds[0];
attribs[atti++] = EGL_DMA_BUF_PLANE0_OFFSET_EXT;
attribs[atti++] = (int) buffer->offsets[0];
attribs[atti++] = EGL_DMA_BUF_PLANE0_PITCH_EXT;
attribs[atti++] = (int) buffer->strides[0];
attribs[atti++] = EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT;
attribs[atti++] = buffer->modifier & 0xFFFFFFFF;
attribs[atti++] = EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT;
attribs[atti++] = buffer->modifier >> 32;
if (buffer->num_planes > 1) {
attribs[atti++] = EGL_DMA_BUF_PLANE1_FD_EXT;
attribs[atti++] = buffer->dmabuf_fds[1];
attribs[atti++] = EGL_DMA_BUF_PLANE1_OFFSET_EXT;
attribs[atti++] = (int) buffer->offsets[1];
attribs[atti++] = EGL_DMA_BUF_PLANE1_PITCH_EXT;
attribs[atti++] = (int) buffer->strides[1];
attribs[atti++] = EGL_DMA_BUF_PLANE1_MODIFIER_LO_EXT;
attribs[atti++] = buffer->modifier & 0xFFFFFFFF;
attribs[atti++] = EGL_DMA_BUF_PLANE1_MODIFIER_HI_EXT;
attribs[atti++] = buffer->modifier >> 32;
}
if (buffer->num_planes > 2) {
attribs[atti++] = EGL_DMA_BUF_PLANE2_FD_EXT;
attribs[atti++] = buffer->dmabuf_fds[2];
attribs[atti++] = EGL_DMA_BUF_PLANE2_OFFSET_EXT;
attribs[atti++] = (int) buffer->offsets[2];
attribs[atti++] = EGL_DMA_BUF_PLANE2_PITCH_EXT;
attribs[atti++] = (int) buffer->strides[2];
attribs[atti++] = EGL_DMA_BUF_PLANE2_MODIFIER_LO_EXT;
attribs[atti++] = buffer->modifier & 0xFFFFFFFF;
attribs[atti++] = EGL_DMA_BUF_PLANE2_MODIFIER_HI_EXT;
attribs[atti++] = buffer->modifier >> 32;
}
if (buffer->num_planes > 3) {
attribs[atti++] = EGL_DMA_BUF_PLANE3_FD_EXT;
attribs[atti++] = buffer->dmabuf_fds[3];
attribs[atti++] = EGL_DMA_BUF_PLANE3_OFFSET_EXT;
attribs[atti++] = (int) buffer->offsets[3];
attribs[atti++] = EGL_DMA_BUF_PLANE3_PITCH_EXT;
attribs[atti++] = (int) buffer->strides[3];
attribs[atti++] = EGL_DMA_BUF_PLANE3_MODIFIER_LO_EXT;
attribs[atti++] = buffer->modifier & 0xFFFFFFFF;
attribs[atti++] = EGL_DMA_BUF_PLANE3_MODIFIER_HI_EXT;
attribs[atti++] = buffer->modifier >> 32;
}
attribs[atti] = EGL_NONE;
assert(atti < ARRAY_LENGTH(attribs));
buffer->egl_image = display->egl.create_image(display->egl.display,
EGL_NO_CONTEXT,
EGL_LINUX_DMA_BUF_EXT,
NULL, attribs);
assert(buffer->egl_image != EGL_NO_IMAGE_KHR &&
"error: EGLImageKHR creation failed");
if (eglMakeCurrent(display->egl.display, EGL_NO_SURFACE,
EGL_NO_SURFACE, display->egl.context) != EGL_TRUE)
assert(0 && "error: failed to make context current");
glGenTextures(1, &buffer->gl_texture);
glBindTexture(GL_TEXTURE_2D, buffer->gl_texture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
display->egl.image_target_texture_2d(GL_TEXTURE_2D, buffer->egl_image);
glGenFramebuffers(1, &buffer->gl_fbo);
glBindFramebuffer(GL_FRAMEBUFFER, buffer->gl_fbo);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_TEXTURE_2D, buffer->gl_texture, 0);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
assert(0 && "error: FBO creation failed");
}
static void
buffer_free(struct buffer *buf)
{
struct egl *egl = &buf->window->display->egl;
int i;
if (buf->buffer)
wl_buffer_destroy(buf->buffer);
if (buf->gl_fbo)
glDeleteFramebuffers(1, &buf->gl_fbo);
if (buf->gl_texture)
glDeleteTextures(1, &buf->gl_texture);
if (buf->egl_image)
egl->destroy_image(egl->display, buf->egl_image);
if (buf->bo)
gbm_bo_destroy(buf->bo);
for (i = 0; i < buf->num_planes; i++)
close(buf->dmabuf_fds[i]);
buf->created = false;
}
static void
create_dmabuf_buffer(struct window *window, struct buffer *buf, uint32_t width,
uint32_t height, uint32_t format, unsigned int count_modifiers,
uint64_t *modifiers, uint32_t bo_flags);
static void
buffer_recreate(struct buffer *buf, struct window *window)
{
uint32_t width = window->display->output.width;
uint32_t height = window->display->output.height;
if (buf->created)
buffer_free(buf);
create_dmabuf_buffer(window, buf, width, height,
window->format.format,
window->format.modifiers.size / sizeof(uint64_t),
window->format.modifiers.data, window->bo_flags);
buf->created = true;
buf->valid = true;
}
static void
buffer_release(void *data, struct wl_buffer *buffer)
{
struct buffer *buf = data;
buf->status = AVAILABLE;
}
static const struct wl_buffer_listener buffer_listener = {
buffer_release
};
static void
create_succeeded(void *data, struct zwp_linux_buffer_params_v1 *params,
struct wl_buffer *new_buffer)
{
struct buffer *buf = data;
buf->status = AVAILABLE;
buf->buffer = new_buffer;
wl_buffer_add_listener(buf->buffer, &buffer_listener, buf);
zwp_linux_buffer_params_v1_destroy(params);
}
static void
create_failed(void *data, struct zwp_linux_buffer_params_v1 *params)
{
struct buffer *buf = data;
buf->buffer = NULL;
zwp_linux_buffer_params_v1_destroy(params);
assert(0 && "error: zwp_linux_buffer_params.create failed");
}
static const struct zwp_linux_buffer_params_v1_listener params_listener = {
create_succeeded,
create_failed
};
static void
create_dmabuf_buffer(struct window *window, struct buffer *buf, uint32_t width,
uint32_t height, uint32_t format, unsigned int count_modifiers,
uint64_t *modifiers, uint32_t bo_flags)
{
struct display *display = window->display;
static uint32_t flags = 0;
struct zwp_linux_buffer_params_v1 *params;
int i;
buf->status = NOT_CREATED;
buf->window = window;
buf->width = width;
buf->height = height;
buf->format = format;
if (count_modifiers > 0) {
#ifdef HAVE_GBM_BO_CREATE_WITH_MODIFIERS2
buf->bo = gbm_bo_create_with_modifiers2(display->gbm_device,
buf->width, buf->height,
format, modifiers,
count_modifiers,
bo_flags);
#else
buf->bo = gbm_bo_create_with_modifiers(display->gbm_device,
buf->width, buf->height,
format, modifiers,
count_modifiers);
#endif
if (buf->bo)
buf->modifier = gbm_bo_get_modifier(buf->bo);
}
if (!buf->bo) {
buf->bo = gbm_bo_create(display->gbm_device, buf->width,
buf->height, buf->format,
bo_flags);
buf->modifier = DRM_FORMAT_MOD_INVALID;
}
assert(buf->bo && "error: could not create GBM bo for buffer");
buf->num_planes = gbm_bo_get_plane_count(buf->bo);
params = zwp_linux_dmabuf_v1_create_params(window->display->dmabuf);
zwp_linux_buffer_params_v1_add_listener(params, &params_listener, buf);
for (i = 0; i < buf->num_planes; i++) {
buf->dmabuf_fds[i] = gbm_bo_get_fd_for_plane(buf->bo, i);
buf->strides[i] = gbm_bo_get_stride_for_plane(buf->bo, i);
buf->offsets[i] = gbm_bo_get_offset(buf->bo, i);
assert(buf->dmabuf_fds[i] >= 0 &&
"error: could not get fd for GBM bo");
assert(buf->strides[i] > 0 &&
"error: could not get stride for GBM bo");
zwp_linux_buffer_params_v1_add(params, buf->dmabuf_fds[i], i,
buf->offsets[i], buf->strides[i],
buf->modifier >> 32,
buf->modifier & 0xffffffff);
}
zwp_linux_buffer_params_v1_create(params, buf->width, buf->height,
buf->format, flags);
create_fbo_for_buffer(buf);
}
static struct buffer *
window_next_buffer(struct window *window)
{
unsigned int i;
for (i = 0; i < NUM_BUFFERS; i++) {
if (!window->buffers[i].created ||
(!window->buffers[i].valid &&
window->buffers[i].status == AVAILABLE))
buffer_recreate(&window->buffers[i], window);
}
for (i = 0; i < NUM_BUFFERS; i++)
if (window->buffers[i].status == AVAILABLE)
return &window->buffers[i];
while (true) {
/* In this client, we create buffers lazily and also sometimes
* have to recreate the buffers. As we are not using the
* create_immed request from zwp_linux_dmabuf_v1, we need to wait
* for an event from the server (what leads to create_succeeded()
* being called in this client). */
wl_display_roundtrip(window->display->display);
for (i = 0; i < NUM_BUFFERS; i++)
if (window->buffers[i].status == AVAILABLE)
return &window->buffers[i];
}
return NULL;
}
static void
render(struct buffer *buffer)
{
struct window *window = buffer->window;
static const GLfloat verts[4][2] = {
{ -0.5, -0.5 },
{ -0.5, 0.5 },
{ 0.5, -0.5 },
{ 0.5, 0.5 }
};
static const GLfloat colors[4][3] = {
{ 1, 0, 0 },
{ 0, 1, 0 },
{ 0, 0, 1 },
{ 1, 1, 0 }
};
glBindFramebuffer(GL_FRAMEBUFFER, buffer->gl_fbo);
glViewport(0, 0, buffer->width, buffer->height);
glClearColor(0.0, 0.0, 0.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
glVertexAttribPointer(window->gl.pos, 2, GL_FLOAT, GL_FALSE, 0, verts);
glVertexAttribPointer(window->gl.color, 3, GL_FLOAT, GL_FALSE, 0, colors);
glEnableVertexAttribArray(window->gl.pos);
glEnableVertexAttribArray(window->gl.color);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glDisableVertexAttribArray(window->gl.pos);
glDisableVertexAttribArray(window->gl.color);
glFlush();
}
static const struct wl_callback_listener frame_listener;
static const struct wp_presentation_feedback_listener presentation_feedback_listener;
static void
redraw(void *data, struct wl_callback *callback, uint32_t time)
{
struct window *window = data;
struct buffer *buf;
struct wl_region *region;
buf = window_next_buffer(window);
assert(buf && "error: all buffers are busy");
render(buf);
wl_surface_attach(window->surface, buf->buffer, 0, 0);
wl_surface_damage(window->surface, 0, 0, buf->width, buf->height);
if (callback)
wl_callback_destroy(callback);
window->callback = wl_surface_frame(window->surface);
wl_callback_add_listener(window->callback, &frame_listener, window);
if (window->presentation_feedback) {
wp_presentation_feedback_destroy(window->presentation_feedback);
window->presentation_feedback = NULL;
}
if (window->display->presentation) {
window->presentation_feedback =
wp_presentation_feedback(window->display->presentation,
window->surface);
wp_presentation_feedback_add_listener(window->presentation_feedback,
&presentation_feedback_listener,
window);
}
wl_surface_commit(window->surface);
buf->status = IN_USE;
region = wl_compositor_create_region(window->display->compositor);
wl_region_add(region, 0, 0, window->display->output.width,
window->display->output.height);
wl_surface_set_opaque_region(window->surface, region);
wl_region_destroy(region);
}
static const struct wl_callback_listener frame_listener = {
redraw
};
static void presentation_feedback_handle_sync_output(void *data,
struct wp_presentation_feedback *feedback,
struct wl_output *output)
{
}
static void presentation_feedback_handle_presented(void *data,
struct wp_presentation_feedback *feedback,
uint32_t tv_sec_hi,
uint32_t tv_sec_lo,
uint32_t tv_nsec,
uint32_t refresh,
uint32_t seq_hi,
uint32_t seq_lo,
uint32_t flags)
{
struct window *window = data;
bool zero_copy = flags & WP_PRESENTATION_FEEDBACK_KIND_ZERO_COPY;
if (zero_copy && !window->presented_zero_copy) {
fprintf(stderr, "Presenting in zero-copy mode\n");
}
if (!zero_copy && window->presented_zero_copy) {
fprintf(stderr, "Stopped presenting in zero-copy mode\n");
}
window->presented_zero_copy = zero_copy;
wp_presentation_feedback_destroy(feedback);
window->presentation_feedback = NULL;
}
static void presentation_feedback_handle_discarded(void *data,
struct wp_presentation_feedback *feedback)
{
struct window *window = data;
wp_presentation_feedback_destroy(feedback);
window->presentation_feedback = NULL;
}
static const struct wp_presentation_feedback_listener presentation_feedback_listener = {
.sync_output = presentation_feedback_handle_sync_output,
.presented = presentation_feedback_handle_presented,
.discarded = presentation_feedback_handle_discarded,
};
static void
window_buffers_invalidate(struct window *window)
{
unsigned int i;
for (i = 0; i < NUM_BUFFERS; i++)
window->buffers[i].valid = false;
}
static void
xdg_surface_handle_configure(void *data, struct xdg_surface *surface,
uint32_t serial)
{
struct window *window = data;
struct output *output = &window->display->output;
if (output->configure.width != output->width ||
output->configure.height != output->height) {
output->width = output->configure.width;
output->height = output->configure.height;
window_buffers_invalidate (window);
}
xdg_surface_ack_configure(surface, serial);
window->wait_for_configure = false;
}
static const struct xdg_surface_listener xdg_surface_listener = {
xdg_surface_handle_configure,
};
static void
xdg_toplevel_handle_configure(void *data, struct xdg_toplevel *toplevel,
int32_t width, int32_t height,
struct wl_array *states)
{
struct window *window = data;
struct output *output = &window->display->output;
output->configure.width = width;
output->configure.height = height;
}
static void
xdg_toplevel_handle_close(void *data, struct xdg_toplevel *xdg_toplevel)
{
assert(0 && "error: window closed, this should not happen");
}
static const struct xdg_toplevel_listener xdg_toplevel_listener = {
xdg_toplevel_handle_configure,
xdg_toplevel_handle_close,
};
static void
gbm_setup(struct window *window)
{
struct display *display = window->display;
display->gbm_device = gbm_create_device(window->card_fd);
assert(display->gbm_device && "error: could not create GBM device");
}
static void
egl_setup(struct window *window)
{
struct display *display = window->display;
struct egl *egl = &display->egl;
const char *egl_extensions = NULL;
const char *gl_extensions = NULL;
EGLint major, minor;
EGLint ret;
static const EGLint context_attribs[] = {
EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE
};
egl->display = weston_platform_get_egl_display(EGL_PLATFORM_GBM_KHR,
display->gbm_device, NULL);
assert(egl->display && "error: could not create EGL display");
ret = eglInitialize(egl->display, &major, &minor);
assert(ret != EGL_FALSE && "error: failed to initialized EGL display");
ret = eglBindAPI(EGL_OPENGL_ES_API);
assert(ret != EGL_FALSE && "error: failed to set EGL API");
egl_extensions = eglQueryString(egl->display, EGL_EXTENSIONS);
assert(egl_extensions &&
"error: could not retrieve supported EGL extensions");
assert(weston_check_egl_extension(egl_extensions,
"EGL_EXT_image_dma_buf_import"));
assert(weston_check_egl_extension(egl_extensions,
"EGL_KHR_surfaceless_context"));
assert(weston_check_egl_extension(egl_extensions,
"EGL_EXT_image_dma_buf_import_modifiers"));
assert(weston_check_egl_extension(egl_extensions,
"EGL_KHR_no_config_context"));
egl->context = eglCreateContext(egl->display, EGL_NO_CONFIG_KHR,
EGL_NO_CONTEXT, context_attribs);
assert(egl->context != EGL_NO_CONTEXT &&
"error: failed to create EGLContext");
ret = eglMakeCurrent(egl->display, EGL_NO_SURFACE, EGL_NO_SURFACE,
egl->context);
assert(ret == EGL_TRUE && "error: failed to make context current");
gl_extensions = (const char *) glGetString(GL_EXTENSIONS);
assert(gl_extensions &&
"error: could not retrieve supported GL extensions");
assert(weston_check_egl_extension(gl_extensions,
"GL_OES_EGL_image"));
egl->query_dmabuf_modifiers =
(void *) eglGetProcAddress("eglQueryDmaBufModifiersEXT");
egl->create_image =
(void *) eglGetProcAddress("eglCreateImageKHR");
egl->destroy_image =
(void *) eglGetProcAddress("eglDestroyImageKHR");
egl->image_target_texture_2d =
(void *) eglGetProcAddress("glEGLImageTargetTexture2DOES");
}
static void
gl_setup(struct window *window)
{
struct gl *gl = &window->gl;
GLuint vert;
GLuint frag;
vert = create_shader(vert_shader_text, GL_VERTEX_SHADER);
assert(vert != 0 && "error: failed to compile vertex shader");
frag = create_shader(frag_shader_text, GL_FRAGMENT_SHADER);
assert(frag != 0 && "error: failed to compile fragment shader");
gl->program = create_and_link_program(vert ,frag);
assert(gl->program != 0 &&
"error: failed to attach shaders and create a program");
glDeleteShader(vert);
glDeleteShader(frag);
gl->pos = glGetAttribLocation(window->gl.program, "pos");
gl->color = glGetAttribLocation(window->gl.program, "color");
glUseProgram(gl->program);
}
static void
destroy_window(struct window *window)
{
unsigned int i;
if (window->callback)
wl_callback_destroy(window->callback);
if (window->presentation_feedback)
wp_presentation_feedback_destroy(window->presentation_feedback);
for (i = 0; i < NUM_BUFFERS; i++)
if (window->buffers[i].buffer)
buffer_free(&window->buffers[i]);
if (window->xdg_toplevel)
xdg_toplevel_destroy(window->xdg_toplevel);
if (window->xdg_surface)
xdg_surface_destroy(window->xdg_surface);
wl_surface_destroy(window->surface);
close(window->card_fd);
wl_array_release(&window->format.modifiers);
dmabuf_feedback_fini(&window->dmabuf_feedback);
dmabuf_feedback_fini(&window->pending_dmabuf_feedback);
free(window);
}
static const struct zwp_linux_dmabuf_feedback_v1_listener dmabuf_feedback_listener;
static struct window *
create_window(struct display *display)
{
struct window *window;
window = zalloc(sizeof *window);
assert(window && "error: failed to allocate memory for window");
window->display = display;
window->surface = wl_compositor_create_surface(display->compositor);
dmabuf_feedback_init(&window->dmabuf_feedback);
dmabuf_feedback_init(&window->pending_dmabuf_feedback);
wl_array_init(&window->format.modifiers);
window->dmabuf_feedback_obj =
zwp_linux_dmabuf_v1_get_surface_feedback(display->dmabuf,
window->surface);
zwp_linux_dmabuf_feedback_v1_add_listener(window->dmabuf_feedback_obj,
&dmabuf_feedback_listener,
window);
wl_display_roundtrip(display->display);
assert(window->format.format == INITIAL_BUFFER_FORMAT &&
"error: could not setup window->format based on dma-buf feedback");
gbm_setup(window);
egl_setup(window);
gl_setup(window);
window->xdg_surface = xdg_wm_base_get_xdg_surface(display->wm_base,
window->surface);
assert(window->xdg_surface && "error: could not get XDG surface");
xdg_surface_add_listener(window->xdg_surface, &xdg_surface_listener,
window);
window->xdg_toplevel = xdg_surface_get_toplevel(window->xdg_surface);
assert(window->xdg_toplevel && "error: could not get XDG toplevel");
xdg_toplevel_add_listener(window->xdg_toplevel, &xdg_toplevel_listener,
window);
xdg_toplevel_set_title(window->xdg_toplevel, "simple-dmabuf-feedback");
xdg_toplevel_set_app_id(window->xdg_toplevel,
"org.freedesktop.weston.simple-dmabuf-feedback");
xdg_toplevel_set_fullscreen(window->xdg_toplevel, NULL);
window->wait_for_configure = true;
wl_surface_commit(window->surface);
wl_display_roundtrip(display->display);
assert(!window->wait_for_configure &&
"error: could not configure XDG surface");
return window;
}
static char *
get_most_appropriate_node(const char *drm_node, bool is_scanout_device)
{
drmDevice **devices;
drmDevice *match = NULL;
char *appropriate_node = NULL;
int num_devices;
int i, j;
num_devices = drmGetDevices2(0, NULL, 0);
assert(num_devices > 0 && "error: no drm devices available");
devices = zalloc(num_devices * sizeof(*devices));
assert(devices && "error: failed to allocate memory for drm devices");
num_devices = drmGetDevices2(0, devices, num_devices);
assert(num_devices > 0 && "error: no drm devices available");
for (i = 0; i < num_devices && match == NULL; i++) {
for (j = 0; j < DRM_NODE_MAX && match == NULL; j++) {
if (!(devices[i]->available_nodes & (1 << j)))
continue;
if (strcmp(devices[i]->nodes[j], drm_node) == 0)
match = devices[i];
}
}
assert(match != NULL && "error: could not find device on the list");
assert(match->available_nodes & (1 << DRM_NODE_PRIMARY));
if (is_scanout_device) {
appropriate_node = strdup(match->nodes[DRM_NODE_PRIMARY]);
} else {
if (match->available_nodes & (1 << DRM_NODE_RENDER))
appropriate_node = strdup(match->nodes[DRM_NODE_RENDER]);
else
appropriate_node = strdup(match->nodes[DRM_NODE_PRIMARY]);
}
assert(appropriate_node && "error: could not get drm node");
for (i = 0; i < num_devices; i++)
drmFreeDevice(&devices[i]);
free(devices);
return appropriate_node;
}
static char *
get_drm_node(dev_t device, bool is_scanout_device)
{
struct udev *udev;
struct udev_device *udev_dev;
const char *drm_node;
udev = udev_new();
assert(udev && "error: failed to create udev context object");
udev_dev = udev_device_new_from_devnum(udev, 'c', device);
assert(udev_dev && "error: failed to create udev device");
drm_node = udev_device_get_devnode(udev_dev);
assert(drm_node && "error: failed to retrieve drm node");
udev_unref(udev);
return get_most_appropriate_node(drm_node, is_scanout_device);
}
static void
dmabuf_feedback_format_table(void *data,
struct zwp_linux_dmabuf_feedback_v1 *zwp_linux_dmabuf_feedback_v1,
int32_t fd, uint32_t size)
{
struct window *window = data;
struct dmabuf_feedback *feedback = &window->pending_dmabuf_feedback;
feedback->format_table.size = size;
feedback->format_table.data = mmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0);
close(fd);
}
static void
dmabuf_feedback_main_device(void *data,
struct zwp_linux_dmabuf_feedback_v1 *dmabuf_feedback,
struct wl_array *dev)
{
struct window *window = data;
struct dmabuf_feedback *feedback = &window->pending_dmabuf_feedback;
char *drm_node;
assert(dev->size == sizeof(feedback->main_device) &&
"error: compositor didn't send a dev_t, size is wrong");
memcpy(&feedback->main_device, dev->data, sizeof(dev));
drm_node = get_drm_node(feedback->main_device, false);
assert(drm_node && "error: failed to retrieve drm node");
fprintf(stderr, "feedback: main device %s\n", drm_node);
if (!window->card_fd) {
window->card_fd = open(drm_node, O_RDWR | O_CLOEXEC);
assert(window->card_fd > 0 && "error: could not open card node");
}
free(drm_node);
}
static void
dmabuf_feedback_tranche_target_device(void *data,
struct zwp_linux_dmabuf_feedback_v1 *dmabuf_feedback,
struct wl_array *dev)
{
struct window *window = data;
struct dmabuf_feedback *feedback = &window->pending_dmabuf_feedback;
assert(dev->size == sizeof(feedback->pending_tranche.target_device) &&
"error: compositor didn't send a dev_t, size is wrong");
memcpy(&feedback->pending_tranche.target_device, dev->data, sizeof(dev));
}
static void
dmabuf_feedback_tranche_flags(void *data,
struct zwp_linux_dmabuf_feedback_v1 *dmabuf_feedback,
uint32_t flags)
{
struct window *window = data;
struct dmabuf_feedback *feedback = &window->pending_dmabuf_feedback;
if (flags & ZWP_LINUX_DMABUF_FEEDBACK_V1_TRANCHE_FLAGS_SCANOUT)
feedback->pending_tranche.is_scanout_tranche = true;
}
static void
dmabuf_feedback_tranche_formats(void *data,
struct zwp_linux_dmabuf_feedback_v1 *dmabuf_feedback,
struct wl_array *indices)
{
struct window *window = data;
struct dmabuf_feedback *feedback = &window->pending_dmabuf_feedback;
struct drm_format *fmt;
uint64_t modifier;
uint32_t format;
uint16_t *index;
/* Compositor may advertise or not a format table. If it does, we use
* it. Otherwise, we steal the most recent advertised format table */
if (feedback->format_table.data == NULL) {
feedback->format_table = window->dmabuf_feedback.format_table;
dmabuf_feedback_format_table_init(&window->dmabuf_feedback.format_table);
}
assert(feedback->format_table.data != NULL &&
"error: compositor should advertise format table");
assert(feedback->format_table.data != MAP_FAILED &&
"error: we could not map format table advertised by compositor");
wl_array_for_each(index, indices) {
format = feedback->format_table.data[*index].format;
modifier = feedback->format_table.data[*index].modifier;
fmt = drm_format_array_add_format(&feedback->pending_tranche.formats,
format);
drm_format_add_modifier(fmt, modifier);
}
}
static char
bits2graph(uint32_t value, unsigned bitoffset)
{
int c = (value >> bitoffset) & 0xff;
if (isgraph(c) || isspace(c))
return c;
return '?';
}
static void
fourcc2str(uint32_t format, char *str, int len)
{
int i;
assert(len >= 5);
for (i = 0; i < 4; i++)
str[i] = bits2graph(format, i * 8);
str[i] = '\0';
}
static void
print_tranche_format_modifier(uint32_t format, uint64_t modifier)
{
const struct pixel_format_info *fmt_info;
char *format_str;
char *mod_name;
int len;
mod_name = pixel_format_get_modifier(modifier);
fmt_info = pixel_format_get_info(format);
if (fmt_info) {
len = asprintf(&format_str, "%s", fmt_info->drm_format_name);
} else {
char fourcc_str[5];
fourcc2str(format, fourcc_str, sizeof(fourcc_str));
len = asprintf(&format_str, "%s (0x%08x)", fourcc_str, format);
}
assert(len > 0);
fprintf(stderr, L_LINE L_VAL " format %s, modifier %s\n",
format_str, mod_name);
free(format_str);
free(mod_name);
}
static void
print_dmabuf_feedback_tranche(struct dmabuf_feedback_tranche *tranche)
{
char *drm_node;
struct drm_format *fmt;
uint64_t *mod;
drm_node = get_drm_node(tranche->target_device, tranche->is_scanout_tranche);
assert(drm_node && "error: could not retrieve drm node");
fprintf(stderr, L_VAL " tranche: target device %s, %s\n",
drm_node, tranche->is_scanout_tranche ? "scanout" : "no flags");
wl_array_for_each(fmt, &tranche->formats.arr)
wl_array_for_each(mod, &fmt->modifiers)
print_tranche_format_modifier(fmt->format, *mod);
fprintf(stderr, L_LINE L_LAST " end of tranche\n");
}
static void
dmabuf_feedback_tranche_done(void *data,
struct zwp_linux_dmabuf_feedback_v1 *dmabuf_feedback)
{
struct window *window = data;
struct dmabuf_feedback *feedback = &window->pending_dmabuf_feedback;
struct dmabuf_feedback_tranche *tranche;
print_dmabuf_feedback_tranche(&feedback->pending_tranche);
tranche = wl_array_add(&feedback->tranches, sizeof(*tranche));
assert(tranche && "error: could not allocate memory for tranche");
memcpy(tranche, &feedback->pending_tranche, sizeof(*tranche));
dmabuf_feedback_tranche_init(&feedback->pending_tranche);
}
static bool
pick_initial_format_from_renderer_tranche(struct window *window,
struct dmabuf_feedback_tranche *tranche)
{
struct drm_format *fmt;
wl_array_for_each(fmt, &tranche->formats.arr) {
/* Skip formats that are not the one we want to start with. */
if (fmt->format != INITIAL_BUFFER_FORMAT)
continue;
window->format.format = fmt->format;
wl_array_copy(&window->format.modifiers, &fmt->modifiers);
window->bo_flags = GBM_BO_USE_RENDERING;
return true;
}
return false;
}
static bool
pick_format_from_scanout_tranche(struct window *window,
struct dmabuf_feedback_tranche *tranche)
{
struct drm_format *fmt;
const struct pixel_format_info *format_info;
wl_array_for_each(fmt, &tranche->formats.arr) {
/* Ignore the format that we want to pick from the render
* tranche. */
if (fmt->format == INITIAL_BUFFER_FORMAT)
continue;
/* Format should be supported by the compositor. */
format_info = pixel_format_get_info(fmt->format);
if (!format_info)
continue;
wl_array_release(&window->format.modifiers);
wl_array_init(&window->format.modifiers);
window->format.format = fmt->format;
wl_array_copy(&window->format.modifiers, &fmt->modifiers);
window->bo_flags = GBM_BO_USE_RENDERING | GBM_BO_USE_SCANOUT;
return true;
}
return false;
}
static void
dmabuf_feedback_done(void *data, struct zwp_linux_dmabuf_feedback_v1 *dmabuf_feedback)
{
struct window *window = data;
struct dmabuf_feedback_tranche *tranche;
bool got_scanout_tranche = false;
fprintf(stderr, L_LAST " end of dma-buf feedback\n\n");
/* The first time that we receive dma-buf feedback for a surface it
* contains only the renderer tranches. We pick the INITIAL_BUFFER_FORMAT
* from there. Then the compositor should detect that the format is
* unsupported by the underlying hardware (not actually, but you should
* have faked this in the DRM-backend) and send the scanout tranches. We
* use the formats/modifiers of the scanout tranches to reallocate our
* buffers. */
wl_array_for_each(tranche, &window->pending_dmabuf_feedback.tranches) {
if (tranche->is_scanout_tranche) {
got_scanout_tranche = true;
if (pick_format_from_scanout_tranche(window, tranche)) {
window_buffers_invalidate(window);
break;
}
}
if (pick_initial_format_from_renderer_tranche(window, tranche))
break;
}
if (got_scanout_tranche) {
assert(window->format.format != INITIAL_BUFFER_FORMAT &&
"error: no valid pair of format/modifier in the scanout tranches");
} else {
assert(window->format.format == INITIAL_BUFFER_FORMAT &&
"error: INITIAL_BUFFER_FORMAT not supported by the hardware");
}
dmabuf_feedback_fini(&window->dmabuf_feedback);
window->dmabuf_feedback = window->pending_dmabuf_feedback;
dmabuf_feedback_init(&window->pending_dmabuf_feedback);
}
static const struct zwp_linux_dmabuf_feedback_v1_listener dmabuf_feedback_listener = {
.format_table = dmabuf_feedback_format_table,
.main_device = dmabuf_feedback_main_device,
.tranche_target_device = dmabuf_feedback_tranche_target_device,
.tranche_formats = dmabuf_feedback_tranche_formats,
.tranche_flags = dmabuf_feedback_tranche_flags,
.tranche_done = dmabuf_feedback_tranche_done,
.done = dmabuf_feedback_done,
};
static void
output_handle_geometry(void *data, struct wl_output *wl_output, int x, int y,
int physical_width, int physical_height, int subpixel,
const char *make, const char *model, int32_t transform)
{
struct output *output = data;
output->x = x;
output->y = y;
}
static void
output_handle_mode(void *data, struct wl_output *wl_output, uint32_t flags,
int width, int height, int refresh)
{
}
static void
output_handle_scale(void *data, struct wl_output *wl_output, int scale)
{
struct output *output = data;
output->scale = scale;
}
static void
output_handle_done(void *data, struct wl_output *wl_output)
{
struct output *output = data;
output->initialized = true;
}
static const struct wl_output_listener output_listener = {
output_handle_geometry,
output_handle_mode,
output_handle_done,
output_handle_scale,
};
static void
xdg_wm_base_ping(void *data, struct xdg_wm_base *wm_base, uint32_t serial)
{
xdg_wm_base_pong(wm_base, serial);
}
static const struct xdg_wm_base_listener xdg_wm_base_listener = {
xdg_wm_base_ping,
};
static void
registry_handle_global(void *data, struct wl_registry *registry,
uint32_t id, const char *interface, uint32_t version)
{
struct display *d = data;
if (strcmp(interface, "wl_compositor") == 0) {
d->compositor = wl_registry_bind(registry, id,
&wl_compositor_interface,
1);
} else if (strcmp(interface, "xdg_wm_base") == 0) {
d->wm_base = wl_registry_bind(registry, id,
&xdg_wm_base_interface,
1);
xdg_wm_base_add_listener(d->wm_base, &xdg_wm_base_listener, d);
} else if (strcmp(interface, "wl_output") == 0) {
d->output.wl_output = wl_registry_bind(registry, id,
&wl_output_interface,
MIN(version, 3));
wl_output_add_listener(d->output.wl_output,
&output_listener, &d->output);
} else if (strcmp(interface, "zwp_linux_dmabuf_v1") == 0) {
if (version < ZWP_LINUX_DMABUF_V1_GET_DEFAULT_FEEDBACK_SINCE_VERSION)
return;
d->dmabuf = wl_registry_bind(registry, id,
&zwp_linux_dmabuf_v1_interface,
MIN(version, 4));
} else if (strcmp(interface, "wp_presentation") == 0) {
d->presentation = wl_registry_bind(registry, id,
&wp_presentation_interface,
1);
}
}
static void
registry_handle_global_remove(void *data, struct wl_registry *registry,
uint32_t name)
{
}
static const struct wl_registry_listener registry_listener = {
registry_handle_global,
registry_handle_global_remove
};
static void
destroy_display(struct display *display)
{
gbm_device_destroy(display->gbm_device);
if (display->egl.context != EGL_NO_CONTEXT)
eglDestroyContext(display->egl.display, display->egl.context);
if (display->egl.display != EGL_NO_DISPLAY)
eglTerminate(display->egl.display);
if (display->presentation)
wp_presentation_destroy(display->presentation);
zwp_linux_dmabuf_v1_destroy(display->dmabuf);
xdg_wm_base_destroy(display->wm_base);
wl_compositor_destroy(display->compositor);
wl_registry_destroy(display->registry);
wl_display_flush(display->display);
wl_display_disconnect(display->display);
free(display);
}
static struct display *
create_display()
{
struct display *display = NULL;
display = zalloc(sizeof *display);
assert(display && "error: failed to allocate memory for display");
display->display = wl_display_connect(NULL);
assert(display->display && "error: could not connect to compositor");
display->registry = wl_display_get_registry(display->display);
assert(display->registry && "error: could not get registry");
wl_registry_add_listener(display->registry, &registry_listener, display);
wl_display_roundtrip(display->display);
assert(display->compositor && "error: could not create compositor interface");
assert(display->dmabuf && "error: dma-buf feedback is not supported by compositor");
wl_display_roundtrip(display->display);
assert(display->wm_base && "error: xdg shell is not supported by compositor");
assert(display->output.initialized && "error: output not initialized");
return display;
}
/* Simple client to test the dma-buf feedback implementation. This does not
* replace the need to implement a dma-buf feedback test that can be run in the
* CI. But as we still don't know exactly how to do this, this client can be
* helpful to run tests manually. It can also be helpful to test other
* compositors.
*
* In order to use this client, we have to hack the DRM-backend of the
* compositor to pretend that INITIAL_BUFFER_FORMAT is not supported by the
* planes of the underlying hardware.
*
* How this client works:
*
* This client creates a surface and buffers for it with the same resolution of
* the output mode in use. Also, it sets the surface to fullscreen. So we have
* everything set to allow the surface to be placed in an overlay plane. But as
* these buffers are created with INITIAL_BUFFER_FORMAT, they are not eligible
* for direct scanout.
*
* When Weston creates a client's surface, it adds only the renderer tranche to
* its dma-buf feedback object and send the feedback to the client. But as the
* repaint cycles start and Weston detects that the view of the client is not
* eligible for direct scanout because of the incompatibility of the
* framebuffer's format/modifier pair and the KMS device, it adds a scanout
* tranche to the feedback and resend it. In this scanout tranche the client can
* find parameters to re-allocate its buffers and increase its chances of
* hitting direct scanout. */
int
main(int argc, char **argv)
{
struct display *display;
struct window *window;
int ret = 0;
struct timespec start_time, current_time;
const time_t MAX_TIME_SECONDS = 3;
time_t delta_time = 0;
fprintf(stderr, "This client was written with the purpose of manually test " \
"Weston's dma-buf feedback implementation. See main() " \
"description for more details on how to test this.\n\n");
display = create_display();
window = create_window(display);
clock_gettime(CLOCK_MONOTONIC, &start_time);
redraw(window, NULL, 0);
while (ret != -1 && delta_time < MAX_TIME_SECONDS) {
ret = wl_display_dispatch(display->display);
clock_gettime(CLOCK_MONOTONIC, &current_time);
delta_time = current_time.tv_sec - start_time.tv_sec;
}
destroy_window(window);
destroy_display(display);
return 0;
}
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