CoglBool cogl_wayland_texture_set_region_from_shm_buffer (CoglTexture *texture, int src_x, int src_y, int width, int height, struct wl_shm_buffer * shm_buffer, int dst_x, int dst_y, int level, CoglError **error) { const uint8_t *data = wl_shm_buffer_get_data (shm_buffer); int32_t stride = wl_shm_buffer_get_stride (shm_buffer); CoglPixelFormat format; int bpp; shm_buffer_get_cogl_pixel_format (shm_buffer, &format, NULL); bpp = _cogl_pixel_format_get_bytes_per_pixel (format); return _cogl_texture_set_region (COGL_TEXTURE (texture), width, height, format, stride, data + src_x * bpp + src_y * stride, dst_x, dst_y, level, error); }
static gboolean process_shm_buffer_damage (MetaWaylandBuffer *buffer, CoglTexture *texture, cairo_region_t *region, GError **error) { struct wl_shm_buffer *shm_buffer; int i, n_rectangles; gboolean set_texture_failed = FALSE; n_rectangles = cairo_region_num_rectangles (region); shm_buffer = wl_shm_buffer_get (buffer->resource); wl_shm_buffer_begin_access (shm_buffer); for (i = 0; i < n_rectangles; i++) { const uint8_t *data = wl_shm_buffer_get_data (shm_buffer); int32_t stride = wl_shm_buffer_get_stride (shm_buffer); CoglPixelFormat format; int bpp; cairo_rectangle_int_t rect; shm_buffer_get_cogl_pixel_format (shm_buffer, &format, NULL); bpp = _cogl_pixel_format_get_bytes_per_pixel (format); cairo_region_get_rectangle (region, i, &rect); if (!_cogl_texture_set_region (texture, rect.width, rect.height, format, stride, data + rect.x * bpp + rect.y * stride, rect.x, rect.y, 0, error)) { set_texture_failed = TRUE; break; } } wl_shm_buffer_end_access (shm_buffer); return !set_texture_failed; }
static void _cogl_texture_pixmap_x11_update_image_texture (CoglTexturePixmapX11 *tex_pixmap) { CoglTexture *tex = COGL_TEXTURE (tex_pixmap); Display *display; Visual *visual; CoglPixelFormat image_format; XImage *image; int src_x, src_y; int x, y, width, height; int bpp; int offset; CoglError *ignore = NULL; _COGL_GET_CONTEXT (ctx, NO_RETVAL); display = cogl_xlib_renderer_get_display (ctx->display->renderer); visual = tex_pixmap->visual; /* If the damage region is empty then there's nothing to do */ if (tex_pixmap->damage_rect.x2 == tex_pixmap->damage_rect.x1) return; x = tex_pixmap->damage_rect.x1; y = tex_pixmap->damage_rect.y1; width = tex_pixmap->damage_rect.x2 - x; height = tex_pixmap->damage_rect.y2 - y; /* We lazily create the texture the first time it is needed in case this texture can be entirely handled using the GLX texture instead */ if (tex_pixmap->tex == NULL) { CoglPixelFormat texture_format; texture_format = (tex_pixmap->depth >= 32 ? COGL_PIXEL_FORMAT_RGBA_8888_PRE : COGL_PIXEL_FORMAT_RGB_888); tex_pixmap->tex = create_fallback_texture (ctx, tex->width, tex->height, texture_format); } if (tex_pixmap->image == NULL) { /* If we also haven't got a shm segment then this must be the first time we've tried to update, so lets try allocating shm first */ if (tex_pixmap->shm_info.shmid == -1) try_alloc_shm (tex_pixmap); if (tex_pixmap->shm_info.shmid == -1) { COGL_NOTE (TEXTURE_PIXMAP, "Updating %p using XGetImage", tex_pixmap); /* We'll fallback to using a regular XImage. We'll download the entire area instead of a sub region because presumably if this is the first update then the entire pixmap is needed anyway and it saves trying to manually allocate an XImage at the right size */ tex_pixmap->image = XGetImage (display, tex_pixmap->pixmap, 0, 0, tex->width, tex->height, AllPlanes, ZPixmap); image = tex_pixmap->image; src_x = x; src_y = y; } else { COGL_NOTE (TEXTURE_PIXMAP, "Updating %p using XShmGetImage", tex_pixmap); /* Create a temporary image using the beginning of the shared memory segment and the right size for the region we want to update. We need to reallocate the XImage every time because there is no XShmGetSubImage. */ image = XShmCreateImage (display, tex_pixmap->visual, tex_pixmap->depth, ZPixmap, NULL, &tex_pixmap->shm_info, width, height); image->data = tex_pixmap->shm_info.shmaddr; src_x = 0; src_y = 0; XShmGetImage (display, tex_pixmap->pixmap, image, x, y, AllPlanes); } } else { COGL_NOTE (TEXTURE_PIXMAP, "Updating %p using XGetSubImage", tex_pixmap); image = tex_pixmap->image; src_x = x; src_y = y; XGetSubImage (display, tex_pixmap->pixmap, x, y, width, height, AllPlanes, ZPixmap, image, x, y); } image_format = _cogl_util_pixel_format_from_masks (visual->red_mask, visual->green_mask, visual->blue_mask, image->depth, image->bits_per_pixel, image->byte_order == LSBFirst); bpp = _cogl_pixel_format_get_bytes_per_pixel (image_format); offset = image->bytes_per_line * src_y + bpp * src_x; _cogl_texture_set_region (tex_pixmap->tex, width, height, image_format, image->bytes_per_line, ((const uint8_t *) image->data) + offset, x, y, 0, /* level */ &ignore); /* If we have a shared memory segment then the XImage would be a temporary one with no data allocated so we can just XFree it */ if (tex_pixmap->shm_info.shmid != -1) XFree (image); memset (&tex_pixmap->damage_rect, 0, sizeof (CoglDamageRectangle)); }