screenshooter: Use the renderer function for reading out pixels

This also changes the compositor's read_format to a pixman format.

src/compositor.h

@@ -353,7 +353,7 @@ struct weston_compositor {
 	PFNEGLDESTROYIMAGEKHRPROC destroy_image;
 
 	int has_unpack_subimage;
-	GLenum read_format;
+	pixman_format_code_t read_format;
 
 	PFNEGLBINDWAYLANDDISPLAYWL bind_display;
 	PFNEGLUNBINDWAYLANDDISPLAYWL unbind_display;

src/gles2-renderer.c

@@ -1751,9 +1751,9 @@ gles2_renderer_setup(struct weston_compositor *ec, EGLSurface egl_surface)
 	}
 
 	if (strstr(extensions, "GL_EXT_read_format_bgra"))
-		ec->read_format = GL_BGRA_EXT;
+		ec->read_format = PIXMAN_a8r8g8b8;
 	else
-		ec->read_format = GL_RGBA;
+		ec->read_format = PIXMAN_a8b8g8r8;
 
 	if (strstr(extensions, "GL_EXT_unpack_subimage"))
 		ec->has_unpack_subimage = 1;

src/screenshooter.c

@@ -112,10 +112,10 @@ screenshooter_frame_notify(struct wl_listener *listener, void *data)
 		return;
 	}
 
-	glPixelStorei(GL_PACK_ALIGNMENT, 1);
-	glReadPixels(0, 0, output->current->width, output->current->height,
-		     output->compositor->read_format,
-		     GL_UNSIGNED_BYTE, pixels);
+	output->compositor->renderer->read_pixels(output,
+			     output->compositor->read_format, pixels,
+			     0, 0, output->current->width,
+			     output->current->height);
 
 	stride = wl_shm_buffer_get_stride(l->buffer);
 
@@ -123,10 +123,10 @@ screenshooter_frame_notify(struct wl_listener *listener, void *data)
 	s = pixels + stride * (l->buffer->height - 1);
 
 	switch (output->compositor->read_format) {
-	case GL_BGRA_EXT:
+	case PIXMAN_a8r8g8b8:
 		copy_bgra_yflip(d, s, output->current->height, stride);
 		break;
-	case GL_RGBA:
+	case PIXMAN_a8b8g8r8:
 		copy_rgba_yflip(d, s, output->current->height, stride);
 		break;
 	default:
@@ -299,10 +299,10 @@ weston_recorder_frame_notify(struct wl_listener *listener, void *data)
 	for (i = 0; i < n; i++) {
 		width = r[i].x2 - r[i].x1;
 		height = r[i].y2 - r[i].y1;
-		glReadPixels(r[i].x1, output->current->height - r[i].y2,
-			     width, height,
-			     output->compositor->read_format,
-			     GL_UNSIGNED_BYTE, recorder->rect);
+		output->compositor->renderer->read_pixels(output,
+			     output->compositor->read_format, recorder->rect,
+			     r[i].x1, output->current->height - r[i].y2,
+			     width, height);
 
 		s = recorder->rect;
 		p = recorder->rect;
@@ -367,12 +367,15 @@ weston_recorder_create(struct weston_output *output, const char *filename)
 	header.magic = WCAP_HEADER_MAGIC;
 
 	switch (output->compositor->read_format) {
-	case GL_BGRA_EXT:
+	case PIXMAN_a8r8g8b8:
 		header.format = WCAP_FORMAT_XRGB8888;
 		break;
-	case GL_RGBA:
+	case PIXMAN_a8b8g8r8:
 		header.format = WCAP_FORMAT_XBGR8888;
 		break;
+	default:
+		weston_log("unknown recorder format\n");
+		break;
 	}
 
 	header.width = output->current->width;