render: introduce wlr_drm_format_set

This types adds a container for formats + modifiers.

A list that is of [format [modifier]] was chosen instead of
[format modifer] because that is how GBM accepts them.

Co-Authored-By: emersion <contact@emersion.fr>

2 files changed, 29 insertions, 1 deletions

diff --git a/include/wlr/render/drm_format_set.h b/include/wlr/render/drm_format_set.h
new file mode 100644
index 00000000..588914ae
--- /dev/null
+++ b/include/wlr/render/drm_format_set.h
@@ -0,0 +1,27 @@
+#ifndef WLR_RENDER_DRM_FORMAT_SET_H
+#define WLR_RENDER_DRM_FORMAT_SET_H
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+struct wlr_drm_format {
+	uint32_t format;
+	size_t len, cap;
+	uint64_t modifiers[];
+};
+
+struct wlr_drm_format_set {
+	size_t len, cap;
+	struct wlr_drm_format **formats;
+};
+
+void wlr_drm_format_set_finish(struct wlr_drm_format_set *set);
+
+const struct wlr_drm_format *wlr_drm_format_set_get(
+	const struct wlr_drm_format_set *set, uint32_t format);
+
+bool wlr_drm_format_set_add(struct wlr_drm_format_set *set, uint32_t format,
+	uint64_t modifier);
+
+#endif
diff --git a/include/wlr/render/meson.build b/include/wlr/render/meson.build
index 05127bb7..06ebcc37 100644
--- a/include/wlr/render/meson.build
+++ b/include/wlr/render/meson.build
@@ -1,9 +1,10 @@
 install_headers(
 	'dmabuf.h',
 	'egl.h',
+	'drm_format_set.h',
 	'gles2.h',
 	'interface.h',
 	'wlr_renderer.h',
 	'wlr_texture.h',
-	subdir: 'wlr/render'
+	subdir: 'wlr/render',
 )