output: refactor frame submission API

This is necessary for direct scan-out and other upcoming features. This patch
changes the output API to look like the wl_surface API.

Outputs now have some double-buffered state: the frame to be submitted
(currently only wlr_renderer frames are supported) and the damaged region.
To attach a pending frame, use wlr_output_attach_render. To set the pending
damaged region, use wlr_output_set_damage.

To submit the pending state, call wlr_output_commit. This will submit the
pending frame to the backend.

To migrate from the old API to the new one:

- Replace wlr_output_make_current calls by wlr_output_attach_render
- Replace wlr_output_swap_buffers calls by wlr_output_set_damage and
  wlr_output_commit

1 files changed, 3 insertions, 3 deletions

diff --git a/tinywl.c b/tinywl.c
index 16c1f85..ca5cdc9 100644
--- a/tinywl.c
+++ b/tinywl.c
@@ -591,8 +591,8 @@ static void output_frame(struct wl_listener *listener, void *data) {
 	struct timespec now;
 	clock_gettime(CLOCK_MONOTONIC, &now);
 
-	/* wlr_output_make_current makes the OpenGL context current. */
-	if (!wlr_output_make_current(output->wlr_output, NULL)) {
+	/* wlr_output_attach_render makes the OpenGL context current. */
+	if (!wlr_output_attach_render(output->wlr_output, NULL)) {
 		return;
 	}
 	/* The "effective" resolution can change if you rotate your outputs. */
@@ -635,7 +635,7 @@ static void output_frame(struct wl_listener *listener, void *data) {
 	/* Conclude rendering and swap the buffers, showing the final frame
 	 * on-screen. */
 	wlr_renderer_end(renderer);
-	wlr_output_swap_buffers(output->wlr_output, NULL, NULL);
+	wlr_output_commit(output->wlr_output);
 }
 
 static void server_new_output(struct wl_listener *listener, void *data) {