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https://gitlab.freedesktop.org/wayland/weston
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gl-renderer: Keep track of the GL format used for SHM buffers
If the client attaches a new SHM buffer with a different format from a previous one then we ought to trigger a full upload so that GL can allocate a new texture. Otherwise Weston would technically be doing invalid operations because it would call glTexSubImage2D with a different format from the one specified in glTexImage2D. Presumably it would also mean GL would have to convert the buffer as it copies the sub-region in which isn't ideal. This patch makes it decide the GL format when the buffer is attached instead of when processing the damage and it will set needs_full_upload if it is different from what it used before.
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40d02288cb
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@ -90,6 +90,12 @@ struct gl_surface_state {
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int needs_full_upload;
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pixman_region32_t texture_damage;
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/* These are only used by SHM surfaces to detect when we need
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* to do a full upload to specify a new internal texture
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* format */
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GLenum gl_format;
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GLenum gl_pixel_type;
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EGLImageKHR images[3];
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GLenum target;
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int num_images;
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@ -998,8 +1004,6 @@ gl_renderer_flush_damage(struct weston_surface *surface)
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struct weston_buffer *buffer = gs->buffer_ref.buffer;
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struct weston_view *view;
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int texture_used;
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GLenum format;
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int pixel_type;
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#ifdef GL_EXT_unpack_subimage
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pixman_box32_t *rectangles;
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@ -1032,29 +1036,13 @@ gl_renderer_flush_damage(struct weston_surface *surface)
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!gs->needs_full_upload)
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goto done;
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switch (wl_shm_buffer_get_format(buffer->shm_buffer)) {
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case WL_SHM_FORMAT_XRGB8888:
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case WL_SHM_FORMAT_ARGB8888:
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format = GL_BGRA_EXT;
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pixel_type = GL_UNSIGNED_BYTE;
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break;
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case WL_SHM_FORMAT_RGB565:
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format = GL_RGB;
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pixel_type = GL_UNSIGNED_SHORT_5_6_5;
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break;
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default:
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weston_log("warning: unknown shm buffer format\n");
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format = GL_BGRA_EXT;
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pixel_type = GL_UNSIGNED_BYTE;
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}
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glBindTexture(GL_TEXTURE_2D, gs->textures[0]);
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if (!gr->has_unpack_subimage) {
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wl_shm_buffer_begin_access(buffer->shm_buffer);
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glTexImage2D(GL_TEXTURE_2D, 0, format,
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glTexImage2D(GL_TEXTURE_2D, 0, gs->gl_format,
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gs->pitch, buffer->height, 0,
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format, pixel_type,
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gs->gl_format, gs->gl_pixel_type,
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wl_shm_buffer_get_data(buffer->shm_buffer));
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wl_shm_buffer_end_access(buffer->shm_buffer);
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@ -1069,9 +1057,9 @@ gl_renderer_flush_damage(struct weston_surface *surface)
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glPixelStorei(GL_UNPACK_SKIP_PIXELS_EXT, 0);
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glPixelStorei(GL_UNPACK_SKIP_ROWS_EXT, 0);
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wl_shm_buffer_begin_access(buffer->shm_buffer);
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glTexImage2D(GL_TEXTURE_2D, 0, format,
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glTexImage2D(GL_TEXTURE_2D, 0, gs->gl_format,
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gs->pitch, buffer->height, 0,
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format, pixel_type, data);
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gs->gl_format, gs->gl_pixel_type, data);
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wl_shm_buffer_end_access(buffer->shm_buffer);
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goto done;
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}
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@ -1087,7 +1075,7 @@ gl_renderer_flush_damage(struct weston_surface *surface)
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glPixelStorei(GL_UNPACK_SKIP_ROWS_EXT, r.y1);
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glTexSubImage2D(GL_TEXTURE_2D, 0, r.x1, r.y1,
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r.x2 - r.x1, r.y2 - r.y1,
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format, pixel_type, data);
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gs->gl_format, gs->gl_pixel_type, data);
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}
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wl_shm_buffer_end_access(buffer->shm_buffer);
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#endif
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@ -1127,6 +1115,7 @@ gl_renderer_attach_shm(struct weston_surface *es, struct weston_buffer *buffer,
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struct weston_compositor *ec = es->compositor;
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struct gl_renderer *gr = get_renderer(ec);
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struct gl_surface_state *gs = get_surface_state(es);
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GLenum gl_format, gl_pixel_type;
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int pitch;
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buffer->shm_buffer = shm_buffer;
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@ -1137,19 +1126,25 @@ gl_renderer_attach_shm(struct weston_surface *es, struct weston_buffer *buffer,
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case WL_SHM_FORMAT_XRGB8888:
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gs->shader = &gr->texture_shader_rgbx;
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pitch = wl_shm_buffer_get_stride(shm_buffer) / 4;
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gl_format = GL_BGRA_EXT;
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gl_pixel_type = GL_UNSIGNED_BYTE;
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break;
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case WL_SHM_FORMAT_ARGB8888:
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gs->shader = &gr->texture_shader_rgba;
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pitch = wl_shm_buffer_get_stride(shm_buffer) / 4;
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gl_format = GL_BGRA_EXT;
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gl_pixel_type = GL_UNSIGNED_BYTE;
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break;
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case WL_SHM_FORMAT_RGB565:
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gs->shader = &gr->texture_shader_rgbx;
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pitch = wl_shm_buffer_get_stride(shm_buffer) / 2;
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gl_format = GL_RGB;
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gl_pixel_type = GL_UNSIGNED_SHORT_5_6_5;
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break;
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default:
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weston_log("warning: unknown shm buffer format\n");
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gs->shader = &gr->texture_shader_rgba;
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pitch = wl_shm_buffer_get_stride(shm_buffer) / 4;
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weston_log("warning: unknown shm buffer format: %08x\n",
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wl_shm_buffer_get_format(shm_buffer));
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return;
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}
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/* Only allocate a texture if it doesn't match existing one.
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@ -1157,10 +1152,14 @@ gl_renderer_attach_shm(struct weston_surface *es, struct weston_buffer *buffer,
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* happening, we need to allocate a new texture buffer. */
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if (pitch != gs->pitch ||
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buffer->height != gs->height ||
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gl_format != gs->gl_format ||
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gl_pixel_type != gs->gl_pixel_type ||
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gs->buffer_type != BUFFER_TYPE_SHM) {
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gs->pitch = pitch;
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gs->height = buffer->height;
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gs->target = GL_TEXTURE_2D;
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gs->gl_format = gl_format;
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gs->gl_pixel_type = gl_pixel_type;
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gs->buffer_type = BUFFER_TYPE_SHM;
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gs->needs_full_upload = 1;
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gs->y_inverted = 1;
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