Add initial linux_dmabuf protocol support

Tested with

    ./weston-simple-dmabuf-drm
    ./weston-simple-dmabuf-drm --import-immediate=1
    ./weston-simple-dmabuf-drm --y-inverted=1
    (and combinations)

Supports only single plane XRGB dmabufs for now.

2 files changed, 31 insertions, 0 deletions

diff --git a/include/wlr/render/egl.h b/include/wlr/render/egl.h
index 97a28016..f05a9837 100644
--- a/include/wlr/render/egl.h
+++ b/include/wlr/render/egl.h
@@ -6,6 +6,7 @@
 #include <pixman.h>
 #include <stdbool.h>
 #include <wayland-server.h>
+#include <wlr/types/wlr_linux_dmabuf.h>
 
 struct wlr_egl {
 	EGLDisplay display;
@@ -18,6 +19,8 @@ struct wlr_egl {
 	struct {
 		bool buffer_age;
 		bool swap_buffers_with_damage;
+		bool dmabuf_import;
+		bool dmabuf_import_modifiers;
 	} egl_exts;
 
 	struct wl_display *wl_display;
@@ -62,6 +65,31 @@ EGLImageKHR wlr_egl_create_image(struct wlr_egl *egl,
 		EGLenum target, EGLClientBuffer buffer, const EGLint *attribs);
 
 /**
+ * Creates an egl image from the given dmabuf attributes. Check usability
+ * of the dmabuf with wlr_egl_check_import_dmabuf once first.
+ */
+EGLImageKHR wlr_egl_create_image_from_dmabuf(struct wlr_egl *egl,
+		struct wlr_dmabuf_buffer_attribs *attributes);
+
+/**
+ * Try to import the given dmabuf. On success return true false otherwise.
+ * If this succeeds the dmabuf can be used for rendering on a texture
+ */
+bool wlr_egl_check_import_dmabuf(struct wlr_egl *egl,
+		struct wlr_dmabuf_buffer *dmabuf);
+
+/**
+ * Get the available dmabuf formats
+ */
+int wlr_egl_get_dmabuf_formats(struct wlr_egl *egl, int **formats);
+
+/**
+ * Get the available dmabuf modifiers for a given format
+ */
+int wlr_egl_get_dmabuf_modifiers(struct wlr_egl *egl, int format,
+		uint64_t **modifiers);
+
+/**
  * Destroys an egl image created with the given wlr_egl.
  */
 bool wlr_egl_destroy_image(struct wlr_egl *egl, EGLImageKHR image);
diff --git a/include/wlr/render/interface.h b/include/wlr/render/interface.h
index eda5af1c..2ba584d9 100644
--- a/include/wlr/render/interface.h
+++ b/include/wlr/render/interface.h
@@ -8,6 +8,7 @@
 #include <wlr/render.h>
 #include <wlr/types/wlr_box.h>
 #include <wlr/types/wlr_output.h>
+#include <wlr/types/wlr_linux_dmabuf.h>
 
 struct wlr_renderer_impl;
 
@@ -58,6 +59,8 @@ struct wlr_texture_impl {
 		struct wl_resource *drm_buf);
 	bool (*upload_eglimage)(struct wlr_texture *texture, EGLImageKHR image,
 		uint32_t width, uint32_t height);
+	bool (*upload_dmabuf)(struct wlr_texture *texture,
+		struct wl_resource *dmabuf_resource);
 	void (*get_matrix)(struct wlr_texture *state,
 		float (*matrix)[16], const float (*projection)[16], int x, int y);
 	void (*get_buffer_size)(struct wlr_texture *texture,