Implement wlr_surface_flush_damage

examples/compositor/main.c

@@ -42,6 +42,7 @@ void handle_output_frame(struct output_state *output, struct timespec *ts) {
 	float matrix[16];
 	wl_list_for_each(_res, &sample->compositor.surfaces, link) {
 		struct wlr_surface *surface = wl_resource_get_user_data(_res);
+		wlr_surface_flush_damage(surface);
 		if (surface->texture->valid) {
 			wlr_texture_get_matrix(surface->texture, &matrix,
 					&wlr_output->transform_matrix, 200, 200);

include/wlr/types/wlr_surface.h

@@ -47,5 +47,6 @@ struct wlr_surface {
 struct wlr_renderer;
 struct wlr_surface *wlr_surface_create(struct wl_resource *res,
 		struct wlr_renderer *renderer);
+void wlr_surface_flush_damage(struct wlr_surface *surface);
 
 #endif

render/gles2/texture.c

@@ -39,7 +39,9 @@ static bool gles2_texture_update_pixels(struct wlr_texture_state *texture,
 	assert(texture && texture->wlr_texture->valid);
 	// TODO: Test if the unpack subimage extension is supported and adjust the
 	// upload strategy if not
-	if (texture->wlr_texture->format != format) {
+	if (!texture->wlr_texture->valid
+			|| texture->wlr_texture->format != format
+		/*	|| unpack not supported */) {
 		return gles2_texture_upload_pixels(texture, format, stride,
 				width, height, pixels);
 	}
@@ -90,8 +92,10 @@ static bool gles2_texture_update_shm(struct wlr_texture_state *texture,
 		struct wl_shm_buffer *buffer) {
 	// TODO: Test if the unpack subimage extension is supported and adjust the
 	// upload strategy if not
-	assert(texture && texture->wlr_texture->valid);
+	assert(texture);
-	if (texture->wlr_texture->format != format) {
+	if (!texture->wlr_texture->valid
+			|| texture->wlr_texture->format != format
+		/*	|| unpack not supported */) {
 		return gles2_texture_upload_shm(texture, format, buffer);
 	}
 	const struct pixel_format *fmt = texture->pixel_format;
@@ -103,7 +107,8 @@ static bool gles2_texture_update_shm(struct wlr_texture_state *texture,
 	GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, pitch));
 	GL_CALL(glPixelStorei(GL_UNPACK_SKIP_PIXELS_EXT, x));
 	GL_CALL(glPixelStorei(GL_UNPACK_SKIP_ROWS_EXT, y));
-	GL_CALL(glTexImage2D(GL_TEXTURE_2D, 0, fmt->gl_format, width, height, 0,
+	wlr_log(L_DEBUG, "%dx%d@%d,%d", width, height, x, y);
+	GL_CALL(glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, width, height,
 			fmt->gl_format, fmt->gl_type, pixels));
 	GL_CALL(glPixelStorei(GL_UNPACK_SKIP_PIXELS_EXT, 0));
 	GL_CALL(glPixelStorei(GL_UNPACK_SKIP_ROWS_EXT, 0));

types/wlr_surface.c

@@ -95,18 +95,6 @@ static void surface_commit(struct wl_client *client,
 
 	if ((surface->pending.invalid & WLR_SURFACE_INVALID_BUFFER)) {
 		surface->current.buffer = surface->pending.buffer;
-		// TODO: Move to wlr_surface_flush_damage and call from output frame
-		// callbacks instead of immediately here
-		if (surface->current.buffer) {
-			struct wl_shm_buffer *buffer = wl_shm_buffer_get(surface->current.buffer);
-			if (!buffer) {
-				wlr_log(L_INFO, "Unknown buffer handle attached");
-			} else {
-				uint32_t format = wl_shm_buffer_get_format(buffer);
-				wlr_texture_upload_shm(surface->texture, format, buffer);
-				wl_resource_queue_event(surface->current.buffer, WL_BUFFER_RELEASE);
-			}
-		}
 	}
 	if ((surface->pending.invalid & WLR_SURFACE_INVALID_SURFACE_DAMAGE)) {
 		// TODO: Sort out buffer damage too
@@ -126,6 +114,41 @@ static void surface_commit(struct wl_client *client,
 	wl_signal_emit(&surface->signals.commit, surface);
 }
 
+void wlr_surface_flush_damage(struct wlr_surface *surface) {
+	if (!surface->current.buffer) {
+		if (surface->texture->valid) {
+			// TODO: Detach buffers
+		}
+		return;
+	}
+	struct wl_shm_buffer *buffer = wl_shm_buffer_get(surface->current.buffer);
+	if (!buffer) {
+		wlr_log(L_INFO, "Unknown buffer handle attached");
+		return;
+	}
+	pixman_region32_t damage = surface->current.surface_damage;
+	if (!pixman_region32_not_empty(&damage)) {
+		return;
+	}
+	int n;
+	pixman_box32_t *rects = pixman_region32_rectangles(&damage, &n);
+	uint32_t format = wl_shm_buffer_get_format(buffer);
+	for (int i = 0; i < n; ++i) {
+		pixman_box32_t rect = rects[i];
+		wlr_log(L_DEBUG, "%d,%d:%d,%d", rect.x1, rect.y1, rect.x2, rect.y2);
+		if (!wlr_texture_update_shm(surface->texture, format,
+				rect.x1, rect.y1, 
+				rect.x2 - rect.x1,
+				rect.y2 - rect.y1,
+				buffer)) {
+			break;
+		}
+	}
+	pixman_region32_fini(&surface->current.surface_damage);
+	pixman_region32_init(&surface->current.surface_damage);
+	wl_resource_queue_event(surface->current.buffer, WL_BUFFER_RELEASE);
+}
+
 static void surface_set_buffer_transform(struct wl_client *client,
 		struct wl_resource *resource, int transform) {
 	wlr_log(L_DEBUG, "TODO: surface surface buffer transform");