From 692e03f1556ce69a973a1806aa72b8e8a3986dc5 Mon Sep 17 00:00:00 2001
From: Simon Ser <contact@emersion.fr>
Date: Wed, 14 Sep 2022 13:09:48 +0200
Subject: [PATCH] Use linux-dmabuf feedback builder

References: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/3716
---
 sway/tree/container.c | 75 +++++++------------------------------------
 1 file changed, 12 insertions(+), 63 deletions(-)

diff --git a/sway/tree/container.c b/sway/tree/container.c
index 04ef965f8..64a3a932d 100644
--- a/sway/tree/container.c
+++ b/sway/tree/container.c
@@ -5,13 +5,9 @@
 #include <stdlib.h>
 #include <string.h>
 #include <strings.h>
-#include <sys/stat.h>
-#include <wayland-server-core.h>
 #include <wlr/types/wlr_linux_dmabuf_v1.h>
 #include <wlr/types/wlr_output_layout.h>
 #include <wlr/types/wlr_subcompositor.h>
-#include <wlr/render/drm_format_set.h>
-#include "linux-dmabuf-unstable-v1-protocol.h"
 #include "cairo_util.h"
 #include "pango.h"
 #include "sway/config.h"
@@ -1062,16 +1058,6 @@ void container_end_mouse_operation(struct sway_container *container) {
 	}
 }
 
-static bool devid_from_fd(int fd, dev_t *devid) {
-	struct stat stat;
-	if (fstat(fd, &stat) != 0) {
-		sway_log_errno(SWAY_ERROR, "fstat failed");
-		return false;
-	}
-	*devid = stat.st_rdev;
-	return true;
-}
-
 static void set_fullscreen(struct sway_container *con, bool enable) {
 	if (!con->view) {
 		return;
@@ -1098,60 +1084,23 @@ static void set_fullscreen(struct sway_container *con, bool enable) {
 	}
 
 	struct sway_output *output = con->pending.workspace->output;
-	struct wlr_output *wlr_output = output->wlr_output;
 
-	// TODO: add wlroots helpers for all of this stuff
+	struct wlr_linux_dmabuf_feedback_v1_builder *builder =
+		wlr_linux_dmabuf_feedback_v1_builder_create();
 
-	const struct wlr_drm_format_set *renderer_formats =
-		wlr_renderer_get_dmabuf_texture_formats(server.renderer);
-	assert(renderer_formats);
+	wlr_linux_dmabuf_feedback_v1_builder_set_main_renderer(builder,
+		server.renderer);
+	wlr_linux_dmabuf_feedback_v1_builder_set_scanout_primary_output(builder,
+		output->wlr_output);
 
-	int renderer_drm_fd = wlr_renderer_get_drm_fd(server.renderer);
-	int backend_drm_fd = wlr_backend_get_drm_fd(wlr_output->backend);
-	if (renderer_drm_fd < 0 || backend_drm_fd < 0) {
-		return;
+	const struct wlr_linux_dmabuf_feedback_v1 *feedback =
+		wlr_linux_dmabuf_feedback_v1_builder_get_feedback(builder);
+	if (feedback != NULL) {
+		wlr_linux_dmabuf_v1_set_surface_feedback(server.linux_dmabuf_v1,
+			con->view->surface, feedback);
 	}
 
-	dev_t render_dev, scanout_dev;
-	if (!devid_from_fd(renderer_drm_fd, &render_dev) ||
-			!devid_from_fd(backend_drm_fd, &scanout_dev)) {
-		return;
-	}
-
-	const struct wlr_drm_format_set *output_formats =
-		wlr_output_get_primary_formats(output->wlr_output,
-		WLR_BUFFER_CAP_DMABUF);
-	if (!output_formats) {
-		return;
-	}
-
-	struct wlr_drm_format_set scanout_formats = {0};
-	if (!wlr_drm_format_set_intersect(&scanout_formats,
-			output_formats, renderer_formats)) {
-		return;
-	}
-
-	struct wlr_linux_dmabuf_feedback_v1_tranche tranches[] = {
-		{
-			.target_device = scanout_dev,
-			.flags = ZWP_LINUX_DMABUF_FEEDBACK_V1_TRANCHE_FLAGS_SCANOUT,
-			.formats = &scanout_formats,
-		},
-		{
-			.target_device = render_dev,
-			.formats = renderer_formats,
-		},
-	};
-
-	const struct wlr_linux_dmabuf_feedback_v1 feedback = {
-		.main_device = render_dev,
-		.tranches = tranches,
-		.tranches_len = sizeof(tranches) / sizeof(tranches[0]),
-	};
-	wlr_linux_dmabuf_v1_set_surface_feedback(server.linux_dmabuf_v1,
-		con->view->surface, &feedback);
-
-	wlr_drm_format_set_finish(&scanout_formats);
+	wlr_linux_dmabuf_feedback_v1_builder_destroy(builder);
 }
 
 static void container_fullscreen_workspace(struct sway_container *con) {