Optimize fullscreen scanout abit

Use the drm fb_id used for the scanout-test
as well for the corresponding pageflip.

Move most of the scanout details into compositor-drm.

compositor/compositor-drm.c

@@ -64,6 +64,8 @@ struct drm_output {
 	EGLImageKHR image[2];
 	uint32_t current;	
 
+	struct wlsc_surface *scanout_surface;
+
 	uint32_t fs_surf_fb_id;
 	uint32_t pending_fs_surf_fb_id;
 };
@@ -90,7 +92,6 @@ drm_output_present(struct wlsc_output *output_base)
 	struct drm_output *output = (struct drm_output *) output_base;
 	struct drm_compositor *c =
 		(struct drm_compositor *) output->base.compositor;
-	int ret;
 	uint32_t fb_id = 0;
 
 	if (drm_output_prepare_render(&output->base))
@@ -99,22 +100,8 @@ drm_output_present(struct wlsc_output *output_base)
 
 	output->current ^= 1;
 
-	if (output->base.scanout_surface) {
+	if (output->scanout_surface != NULL) {
-		EGLint handle, stride;
+		output->scanout_surface = NULL;
-
-		eglExportDRMImageMESA(c->base.display,
-				      output->base.scanout_surface->image,
-				      NULL, &handle, &stride);
-
-		ret = drmModeAddFB(c->drm.fd,
-				   output->base.width, output->base.height,
-				   32, 32, stride, handle,
-				   &output->fs_surf_fb_id);
-		if (ret)
-			return -1;
-
-		printf("pageflip to fullscreen buffer: %d\n", handle);
-
 		fb_id = output->fs_surf_fb_id;
 	} else {
 		fb_id = output->fb_id[output->current ^ 1];
@@ -151,8 +138,8 @@ page_flip_handler(int fd, unsigned int frame,
 }
 
 static int
-drm_output_image_is_scanoutable(struct wlsc_output *output_base,
+drm_output_prepare_scanout_surface(struct wlsc_output *output_base,
-				EGLImageKHR image)
+				   struct wlsc_surface *es)
 {
 	struct drm_output *output = (struct drm_output *) output_base;
 	struct drm_compositor *c =
@@ -161,22 +148,28 @@ drm_output_image_is_scanoutable(struct wlsc_output *output_base,
 	int ret;
 	uint32_t fb_id = 0;
 
-	eglExportDRMImageMESA(c->base.display, image,
+	if (es->width != output->base.width ||
+	    es->height != output->base.height ||
+	    es->image == EGL_NO_IMAGE_KHR)
+		return -1;
+
+	eglExportDRMImageMESA(c->base.display, es->image,
 			      NULL, &handle, &stride);
 
+	if (handle == 0)
+		return -1;
+
 	ret = drmModeAddFB(c->drm.fd,
 			   output->base.width, output->base.height,
-			   32, 32, stride, handle,
+			   32, 32, stride, handle, &fb_id);
-			   &fb_id);
+
 	if (ret)
-		return 0;
+		return -1;
 
-	/* FIXME: change interface to keep this fb_id,
+	output->fs_surf_fb_id = fb_id;
-	 * to be used directly in next pageflip? */
+	output->scanout_surface = es;
-	if (fb_id)
-		drmModeRmFB(c->drm.fd, fb_id);
 
-	return fb_id != 0;
+	return 0;
 }
 
 static int
@@ -412,9 +405,11 @@ create_output_for_connector(struct drm_compositor *ec,
 		return -1;
 	}
 
+	output->scanout_surface = NULL;
 	output->base.prepare_render = drm_output_prepare_render;
 	output->base.present = drm_output_present;
-	output->base.image_is_scanoutable = drm_output_image_is_scanoutable;
+	output->base.prepare_scanout_surface =
+		drm_output_prepare_scanout_surface;
 	output->base.set_hardware_cursor = drm_output_set_cursor;
 
 	wl_list_insert(ec->base.output_list.prev, &output->base.link);

compositor/compositor-wayland.c

@@ -197,10 +197,10 @@ wayland_output_present(struct wlsc_output *output_base)
 }
 
 static int
-wayland_output_image_is_scanoutable(struct wlsc_output *output_base,
+wayland_output_prepare_scanout_surface(struct wlsc_output *output_base,
-				    EGLImageKHR image)
+				       struct wlsc_surface *es)
 {
-	return 0;
+	return -1;
 }
 
 static int
@@ -260,7 +260,8 @@ wayland_compositor_create_output(struct wayland_compositor *c,
 
 	output->base.prepare_render = wayland_output_prepare_render;
 	output->base.present = wayland_output_present;
-	output->base.image_is_scanoutable = wayland_output_image_is_scanoutable;
+	output->base.prepare_scanout_surface =
+		wayland_output_prepare_scanout_surface;
 	output->base.set_hardware_cursor = wayland_output_set_cursor;
 
 	wl_list_insert(c->base.output_list.prev, &output->base.link);

compositor/compositor-x11.c

@@ -192,10 +192,10 @@ x11_output_present(struct wlsc_output *output_base)
 }
 
 static int
-x11_output_image_is_scanoutable(struct wlsc_output *output_base,
+x11_output_prepare_scanout_surface(struct wlsc_output *output_base,
-				EGLImageKHR image)
+				   struct wlsc_surface *es)
 {
-	return 0;
+	return -1;
 }
 
 static int
@@ -354,7 +354,8 @@ x11_compositor_create_output(struct x11_compositor *c, int width, int height)
 
 	output->base.prepare_render = x11_output_prepare_render;
 	output->base.present = x11_output_present;
-	output->base.image_is_scanoutable = x11_output_image_is_scanoutable;
+	output->base.prepare_scanout_surface =
+		x11_output_prepare_scanout_surface;
 	output->base.set_hardware_cursor = x11_output_set_cursor;
 
 	wl_list_insert(c->base.output_list.prev, &output->base.link);

compositor/compositor.c

@@ -550,21 +550,6 @@ wlsc_output_finish_frame(struct wlsc_output *output, int msecs)
 	compositor->repaint_on_timeout = 1;
 }
 
-static int
-wlsc_surface_is_scanoutable(struct wlsc_surface *es,
-			    struct wlsc_output *output)
-{
-	if (es->width != output->width ||
-	    es->height != output->height ||
-	    es->image == NULL)
-		return 0;
-
-	if (!output->image_is_scanoutable(output, es->image))
-		return 0;
-
-	return 1;
-}
-
 static void
 wlsc_output_repaint(struct wlsc_output *output)
 {
@@ -597,25 +582,25 @@ wlsc_output_repaint(struct wlsc_output *output)
 		if (output->set_hardware_cursor(output, ec->input_device) < 0)
 			using_hardware_cursor = 0;
 
-	output->scanout_surface = NULL;
-
 	es = container_of(ec->surface_list.next, struct wlsc_surface, link);
 	if (es->map_type == WLSC_SURFACE_MAP_FULLSCREEN &&
 	    es->fullscreen_output == output) {
 		if (es->visual == &ec->compositor.rgb_visual &&
-		    using_hardware_cursor &&
+		    using_hardware_cursor) {
-		    wlsc_surface_is_scanoutable(es, output)) {
+			if (output->prepare_scanout_surface(output, es) == 0) {
-			output->scanout_surface = es;
+				/* We're drawing nothing now,
-			/* we're drawing nothing now, draw the damages later */
+				 * draw the damaged regions later. */
-			pixman_region32_union(&ec->damage_region,
+				pixman_region32_union(&ec->damage_region,
-					      &ec->damage_region,
+						      &ec->damage_region,
-					      &total_damage);
+						      &total_damage);
-		} else {
+				return;
-			if (es->width < output->width ||
+			}
-			    es->height < output->height)
-				glClear(GL_COLOR_BUFFER_BIT);
-			wlsc_surface_draw(es, output, &total_damage);
 		}
+
+		if (es->width < output->width ||
+		    es->height < output->height)
+			glClear(GL_COLOR_BUFFER_BIT);
+		wlsc_surface_draw(es, output, &total_damage);
 	} else {
 		wl_list_for_each(es, &ec->surface_list, link) {
 			if (es->visual != &ec->compositor.rgb_visual)

compositor/compositor.h

@@ -51,12 +51,10 @@ struct wlsc_output {
 	int repaint_needed;
 	int finished;
 
-	struct wlsc_surface *scanout_surface;
-
 	int (*prepare_render)(struct wlsc_output *output);
 	int (*present)(struct wlsc_output *output);
-	int (*image_is_scanoutable)(struct wlsc_output *output,
+	int (*prepare_scanout_surface)(struct wlsc_output *output,
-				    EGLImageKHR image);
+				       struct wlsc_surface *es);
 	int (*set_hardware_cursor)(struct wlsc_output *output,
 				   struct wl_input_device *input);
 };