From ca069ea73863c94a30c2694b9b621775b72c7687 Mon Sep 17 00:00:00 2001
From: Andri Yngvason <andri@yngvason.is>
Date: Sun, 26 Jul 2020 14:26:58 +0000
Subject: [PATCH] buffer: Add function to get available buffer types

---
 include/buffer.h |  2 ++
 src/buffer.c     | 14 ++++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/include/buffer.h b/include/buffer.h
index 9e04c9f..1111ed4 100644
--- a/include/buffer.h
+++ b/include/buffer.h
@@ -60,6 +60,8 @@ struct wv_buffer_pool {
 	uint32_t format;
 };
 
+enum wv_buffer_type wv_buffer_get_available_types(void);
+
 struct wv_buffer* wv_buffer_create(enum wv_buffer_type, int width, int height,
 		int stride, uint32_t fourcc);
 void wv_buffer_destroy(struct wv_buffer* self);
diff --git a/src/buffer.c b/src/buffer.c
index 57caa39..34147d9 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -35,6 +35,19 @@ extern struct wl_shm* wl_shm;
 extern struct zwp_linux_dmabuf_v1* zwp_linux_dmabuf;
 extern struct gbm_device* gbm_device;
 
+enum wv_buffer_type wv_buffer_get_available_types(void)
+{
+	enum wv_buffer_type type = 0;
+
+	if (wl_shm)
+		type |= WV_BUFFER_SHM;
+
+	if (zwp_linux_dmabuf && gbm_device)
+		type |= WV_BUFFER_DMABUF;
+
+	return type;
+}
+
 struct wv_buffer* wv_buffer_create_shm(int width,
 		int height, int stride, uint32_t fourcc)
 {
@@ -90,6 +103,7 @@ static struct wv_buffer* wv_buffer_create_dmabuf(int width, int height,
 		uint32_t fourcc)
 {
 	assert(zwp_linux_dmabuf);
+	assert(gbm_device);
 
 	struct wv_buffer* self = calloc(1, sizeof(*self));
 	if (!self)