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gl-renderer: add support of WL_SHM_FORMAT_YUV420 

This patch allow gl-renderer to accept WL_SHM_FORMAT_YUV420 buffers.

In a gstreamer pipeline, the support of the WL_SHM_FORMAT_YUV420 by
weston avoid pixel conversion between software decoders and waylandsink.
Indeed, software decoders output I420 (YUV420 planar) that will
match with WL_SHM_FORMAT_YUV420.

Signed-off-by: Vincent Abriou <vincent.abriou@st.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
This commit is contained in:
Vincent Abriou 2016-10-05 14:54:34 +02:00 committed by Daniel Stone
parent c950667e87
commit fdeefe4241
1 changed files with 67 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

81
libweston/gl-renderer.c
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@ -160,6 +160,10 @@ struct gl_surface_state {
int height; /* in pixels */
int y_inverted;
/* Extension needed for SHM YUV texture */
int offset[3]; /* offset per plane */
int hvsub[3]; /* horizontal vertical subsampling per plane */
struct weston_surface *surface;
struct wl_listener surface_destroy_listener;
@ -206,6 +210,8 @@ struct gl_renderer {
int has_dmabuf_import;
struct wl_list dmabuf_images;
int has_gl_texture_rg;
struct gl_shader texture_shader_rgba;
struct gl_shader texture_shader_rgbx;
struct gl_shader texture_shader_egl_external;
@ -1230,7 +1236,7 @@ gl_renderer_flush_damage(struct weston_surface *surface)
bool texture_used;
pixman_box32_t *rectangles;
void *data;
int i, n;
int i, j, n;
pixman_region32_union(&gs->texture_damage,
&gs->texture_damage, &surface->damage);
@ -1257,29 +1263,43 @@ gl_renderer_flush_damage(struct weston_surface *surface)
!gs->needs_full_upload)
goto done;
glBindTexture(GL_TEXTURE_2D, gs->textures[0]);
data = wl_shm_buffer_get_data(buffer->shm_buffer);
if (!gr->has_unpack_subimage) {
wl_shm_buffer_begin_access(buffer->shm_buffer);
glTexImage2D(GL_TEXTURE_2D, 0, gs->gl_format,
gs->pitch, buffer->height, 0,
gs->gl_format, gs->gl_pixel_type,
wl_shm_buffer_get_data(buffer->shm_buffer));
for (j = 0; j < gs->num_textures; j++) {
glBindTexture(GL_TEXTURE_2D, gs->textures[j]);
glTexImage2D(GL_TEXTURE_2D, 0,
gs->gl_format,
gs->pitch / gs->hvsub[j],
buffer->height / gs->hvsub[j],
0,
gs->gl_format,
gs->gl_pixel_type,
data + gs->offset[j]);
}
wl_shm_buffer_end_access(buffer->shm_buffer);
goto done;
}
glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, gs->pitch);
data = wl_shm_buffer_get_data(buffer->shm_buffer);
if (gs->needs_full_upload) {
glPixelStorei(GL_UNPACK_SKIP_PIXELS_EXT, 0);
glPixelStorei(GL_UNPACK_SKIP_ROWS_EXT, 0);
wl_shm_buffer_begin_access(buffer->shm_buffer);
glTexImage2D(GL_TEXTURE_2D, 0, gs->gl_format,
gs->pitch, buffer->height, 0,
gs->gl_format, gs->gl_pixel_type, data);
for (j = 0; j < gs->num_textures; j++) {
glBindTexture(GL_TEXTURE_2D, gs->textures[j]);
glTexImage2D(GL_TEXTURE_2D, 0,
gs->gl_format,
gs->pitch / gs->hvsub[j],
buffer->height / gs->hvsub[j],
0,
gs->gl_format,
gs->gl_pixel_type,
data + gs->offset[j]);
}
wl_shm_buffer_end_access(buffer->shm_buffer);
goto done;
}
@ -1293,9 +1313,17 @@ gl_renderer_flush_damage(struct weston_surface *surface)
glPixelStorei(GL_UNPACK_SKIP_PIXELS_EXT, r.x1);
glPixelStorei(GL_UNPACK_SKIP_ROWS_EXT, r.y1);
glTexSubImage2D(GL_TEXTURE_2D, 0, r.x1, r.y1,
r.x2 - r.x1, r.y2 - r.y1,
gs->gl_format, gs->gl_pixel_type, data);
for (j = 0; j < gs->num_textures; j++) {
glBindTexture(GL_TEXTURE_2D, gs->textures[j]);
glTexSubImage2D(GL_TEXTURE_2D, 0,
r.x1 / gs->hvsub[j],
r.y1 / gs->hvsub[j],
(r.x2 - r.x1) / gs->hvsub[j],
(r.y2 - r.y1) / gs->hvsub[j],
gs->gl_format,
gs->gl_pixel_type,
data + gs->offset[j]);
}
}
wl_shm_buffer_end_access(buffer->shm_buffer);
@ -1336,11 +1364,16 @@ gl_renderer_attach_shm(struct weston_surface *es, struct weston_buffer *buffer,
struct gl_surface_state *gs = get_surface_state(es);
GLenum gl_format, gl_pixel_type;
int pitch;
int num_planes;
buffer->shm_buffer = shm_buffer;
buffer->width = wl_shm_buffer_get_width(shm_buffer);
buffer->height = wl_shm_buffer_get_height(shm_buffer);
num_planes = 1;
gs->offset[0] = 0;
gs->hvsub[0] = 1;
switch (wl_shm_buffer_get_format(shm_buffer)) {
case WL_SHM_FORMAT_XRGB8888:
gs->shader = &gr->texture_shader_rgbx;
@ -1360,6 +1393,22 @@ gl_renderer_attach_shm(struct weston_surface *es, struct weston_buffer *buffer,
gl_format = GL_RGB;
gl_pixel_type = GL_UNSIGNED_SHORT_5_6_5;
break;
case WL_SHM_FORMAT_YUV420:
gs->shader = &gr->texture_shader_y_u_v;
pitch = wl_shm_buffer_get_stride(shm_buffer);
if (gr->has_gl_texture_rg)
gl_format = GL_R8_EXT;
else
gl_format = GL_LUMINANCE;
gl_pixel_type = GL_UNSIGNED_BYTE;
num_planes = 3;
gs->offset[1] = gs->offset[0] + (pitch / gs->hvsub[0]) *
(buffer->height / gs->hvsub[0]);
gs->hvsub[1] = 2;
gs->offset[2] = gs->offset[1] + (pitch / gs->hvsub[1]) *
(buffer->height / gs->hvsub[1]);
gs->hvsub[2] = 2;
break;
default:
weston_log("warning: unknown shm buffer format: %08x\n",
wl_shm_buffer_get_format(shm_buffer));
@ -1385,7 +1434,7 @@ gl_renderer_attach_shm(struct weston_surface *es, struct weston_buffer *buffer,
gs->surface = es;
ensure_textures(gs, 1);
ensure_textures(gs, num_planes);
}
}
@ -2756,6 +2805,9 @@ gl_renderer_setup_egl_extensions(struct weston_compositor *ec)
if (weston_check_egl_extension(extensions, "EGL_EXT_image_dma_buf_import"))
gr->has_dmabuf_import = 1;
if (weston_check_egl_extension(extensions, "GL_EXT_texture_rg"))
gr->has_gl_texture_rg = 1;
renderer_setup_egl_client_extensions(gr);
return 0;
@ -3006,6 +3058,7 @@ gl_renderer_create(struct weston_compositor *ec, EGLenum platform,
}
wl_display_add_shm_format(ec->wl_display, WL_SHM_FORMAT_RGB565);
wl_display_add_shm_format(ec->wl_display, WL_SHM_FORMAT_YUV420);
wl_signal_init(&gr->destroy_signal);