Merge pull request #53 from nyorain/drm_buffer

Implement drm (egl) buffer attaching

backend/backend.c

@@ -39,6 +39,13 @@ void wlr_backend_destroy(struct wlr_backend *backend) {
 	free(backend);
 }
 
+struct wlr_egl *wlr_backend_get_egl(struct wlr_backend *backend) {
+	if (!backend->impl->get_egl) {
+		return NULL;
+	}
+	return backend->impl->get_egl(backend->state);
+}
+
 static struct wlr_backend *attempt_wl_backend(struct wl_display *display) {
 	struct wlr_backend *backend = wlr_wl_backend_create(display);
 	if (backend) {

backend/drm/backend.c

@@ -12,6 +12,7 @@
 #include <wlr/interfaces/wlr_output.h>
 #include <wlr/util/list.h>
 #include <wlr/util/log.h>
+#include <wlr/egl.h>
 #include "backend/udev.h"
 #include "backend/drm.h"
 
@@ -38,9 +39,14 @@ static void wlr_drm_backend_destroy(struct wlr_backend_state *drm) {
 	free(drm);
 }
 
+static struct wlr_egl *wlr_drm_backend_get_egl(struct wlr_backend_state *drm) {
+	return &drm->renderer.egl;
+}
+
 static struct wlr_backend_impl backend_impl = {
 	.init = wlr_drm_backend_init,
-	.destroy = wlr_drm_backend_destroy
+	.destroy = wlr_drm_backend_destroy,
+	.get_egl = wlr_drm_backend_get_egl
 };
 
 static void session_signal(struct wl_listener *listener, void *data) {
@@ -149,6 +155,10 @@ struct wlr_backend *wlr_drm_backend_create(struct wl_display *display,
 		goto error_event;
 	}
 
+	if (!wlr_egl_bind_display(&drm->renderer.egl, display)) {
+		wlr_log(L_INFO, "Failed to bind egl/wl display: %s", egl_error());
+	}
+
 	return backend;
 
 error_event:

backend/drm/drm.c

@@ -579,7 +579,7 @@ static bool wlr_drm_output_set_cursor(struct wlr_output_state *output,
 		wlr_matrix_texture(plane->matrix, plane->width, plane->height,
 			output->base->transform ^ WL_OUTPUT_TRANSFORM_FLIPPED_180);
 
-		plane->wlr_rend = wlr_gles2_renderer_init();
+		plane->wlr_rend = wlr_gles2_renderer_init(drm->base);
 		if (!plane->wlr_rend) {
 			return false;
 		}

backend/meson.build

@@ -1,6 +1,5 @@
 wlr_files += files(
     'backend.c',
-    'egl.c',
     'udev.c',
     'session/direct-ipc.c',
     'session/direct.c',

backend/multi/backend.c

@@ -38,9 +38,21 @@ static void multi_backend_destroy(struct wlr_backend_state *state) {
 	free(state);
 }
 
+static struct wlr_egl *multi_backend_get_egl(struct wlr_backend_state *state) {
+	for (size_t i = 0; i < state->backends->length; ++i) {
+		struct subbackend_state *sub = state->backends->items[i];
+		struct wlr_egl *egl = wlr_backend_get_egl(sub->backend);
+		if (egl) {
+			return egl;
+		}
+	}
+	return NULL;
+}
+
 struct wlr_backend_impl backend_impl = {
 	.init = multi_backend_init,
-	.destroy = multi_backend_destroy
+	.destroy = multi_backend_destroy,
+	.get_egl = multi_backend_get_egl
 };
 
 struct wlr_backend *wlr_multi_backend_create(struct wlr_session *session,

backend/wayland/backend.c

@@ -4,6 +4,7 @@
 #include <EGL/egl.h>
 #include <EGL/eglext.h>
 #include <wayland-server.h>
+#include <wlr/egl.h>
 #include <wlr/backend/interface.h>
 #include <wlr/interfaces/wlr_output.h>
 #include <wlr/interfaces/wlr_input_device.h>
@@ -52,6 +53,8 @@ static bool wlr_wl_backend_init(struct wlr_backend_state* state) {
 	}
 
 	wlr_egl_init(&state->egl, EGL_PLATFORM_WAYLAND_EXT, state->remote_display);
+	wlr_egl_bind_display(&state->egl, state->local_display);
+
 	for (size_t i = 0; i < state->requested_outputs; ++i) {
 		wlr_wl_output_create(state->backend);
 	}
@@ -93,9 +96,14 @@ static void wlr_wl_backend_destroy(struct wlr_backend_state *state) {
 	free(state);
 }
 
+static struct wlr_egl *wlr_wl_backend_get_egl(struct wlr_backend_state *state) {
+	return &state->egl;
+}
+
 static struct wlr_backend_impl backend_impl = {
 	.init = wlr_wl_backend_init,
-	.destroy = wlr_wl_backend_destroy
+	.destroy = wlr_wl_backend_destroy,
+	.get_egl = wlr_wl_backend_get_egl
 };
 
 bool wlr_backend_is_wl(struct wlr_backend *b) {

backend/wayland/output.c

@@ -117,6 +117,7 @@ struct wlr_output *wlr_wl_output_create(struct wlr_backend *_backend) {
 	strncpy(wlr_output->model, "wayland", sizeof(wlr_output->model));
 	snprintf(wlr_output->name, sizeof(wlr_output->name), "WL-%zd",
 			backend->outputs->length + 1);
+	wlr_output_update_matrix(wlr_output);
 
 	ostate->backend = backend;
 	ostate->wlr_output = wlr_output;

examples/compositor.h

@@ -14,6 +14,10 @@ struct wl_compositor_state {
 void wl_compositor_init(struct wl_display *display,
 		struct wl_compositor_state *state, struct wlr_renderer *renderer);
 
+struct wlr_surface;
+void wl_compositor_surface_destroyed(struct wl_compositor_state *compositor,
+		struct wlr_surface *surface);
+
 struct wl_shell_state {
 	struct wl_global *wl_global;
 	struct wl_list wl_resources;

examples/compositor/main.c

@@ -68,7 +68,7 @@ int main() {
 	};
 	compositor_init(&compositor);
 
-	state.renderer = wlr_gles2_renderer_init();
+	state.renderer = wlr_gles2_renderer_init(compositor.backend);
 	wl_display_init_shm(compositor.display);
 	wl_compositor_init(compositor.display, &state.compositor, state.renderer);
 	wl_shell_init(compositor.display, &state.shell);

examples/compositor/wl_compositor.c

@@ -7,9 +7,8 @@
 #include "compositor.h"
 
 static void destroy_surface_listener(struct wl_listener *listener, void *data) {
-	struct wl_compositor_state *state;
+	struct wlr_surface *surface = wl_resource_get_user_data(data);
-	struct wlr_surface *surface = data;
+	struct wl_compositor_state *state = surface->compositor_data;
-	state = wl_container_of(listener, state, destroy_surface_listener);
 
 	struct wl_resource *res = NULL;
 	wl_list_for_each(res, &state->surfaces, link) {
@@ -26,8 +25,11 @@ static void wl_compositor_create_surface(struct wl_client *client,
 	struct wl_resource *surface_resource = wl_resource_create(client,
 			&wl_surface_interface, wl_resource_get_version(resource), id);
 	struct wlr_surface *surface = wlr_surface_create(surface_resource, state->renderer);
+	surface->compositor_data = state;
+	surface->compositor_listener.notify = &destroy_surface_listener;
+	wl_resource_add_destroy_listener(surface_resource, &surface->compositor_listener);
+
 	wl_list_insert(&state->surfaces, wl_resource_get_link(surface_resource));
-	wl_signal_add(&surface->signals.destroy, &state->destroy_surface_listener);
 }
 
 static void wl_compositor_create_region(struct wl_client *client,
@@ -74,7 +76,6 @@ void wl_compositor_init(struct wl_display *display,
 		&wl_compositor_interface, 4, state, wl_compositor_bind);
 	state->wl_global = wl_global;
 	state->renderer = renderer;
-	state->destroy_surface_listener.notify = destroy_surface_listener;
 	wl_list_init(&state->wl_resources);
 	wl_list_init(&state->surfaces);
 }

examples/rotation.c

@@ -204,7 +204,7 @@ int main(int argc, char *argv[]) {
 	compositor.keyboard_key_cb = handle_keyboard_key;
 	compositor_init(&compositor);
 
-	state.renderer = wlr_gles2_renderer_init();
+	state.renderer = wlr_gles2_renderer_init(compositor.backend);
 	state.cat_texture = wlr_render_texture_init(state.renderer);
 	wlr_texture_upload_pixels(state.cat_texture, WL_SHM_FORMAT_ABGR8888,
 		cat_tex.width, cat_tex.width, cat_tex.height, cat_tex.pixel_data);

examples/tablet.c

@@ -152,8 +152,7 @@ int main(int argc, char *argv[]) {
 	};
 	compositor_init(&compositor);
 
-	state.renderer = wlr_gles2_renderer_init();
+	state.renderer = wlr_gles2_renderer_init(compositor.backend);
-
 	compositor_run(&compositor);
 
 	wlr_renderer_destroy(state.renderer);

examples/touch.c

@@ -104,7 +104,7 @@ int main(int argc, char *argv[]) {
 	};
 	compositor_init(&compositor);
 
-	state.renderer = wlr_gles2_renderer_init();
+	state.renderer = wlr_gles2_renderer_init(compositor.backend);
 	state.cat_texture = wlr_render_texture_init(state.renderer);
 	wlr_texture_upload_pixels(state.cat_texture, WL_SHM_FORMAT_ARGB8888,
 		cat_tex.width, cat_tex.width, cat_tex.height, cat_tex.pixel_data);

include/backend/drm.h

@@ -12,9 +12,9 @@
 
 #include <wlr/backend/session.h>
 #include <wlr/backend/drm.h>
+#include <wlr/egl.h>
 #include <wlr/util/list.h>
 
-#include <backend/egl.h>
 #include <backend/udev.h>
 #include "drm-properties.h"
 

include/backend/egl.h

@@ -1,18 +0,0 @@
-#ifndef WLR_BACKEND_EGL_H
-#define WLR_BACKEND_EGL_H
-
-#include <EGL/egl.h>
-#include <stdbool.h>
-
-struct wlr_egl {
-	EGLDisplay display;
-	EGLConfig config;
-	EGLContext context;
-};
-
-const char *egl_error(void);
-bool wlr_egl_init(struct wlr_egl *egl, EGLenum platform, void *display);
-void wlr_egl_free(struct wlr_egl *egl);
-EGLSurface wlr_egl_create_surface(struct wlr_egl *egl, void *window);
-
-#endif

include/backend/wayland.h

@@ -4,10 +4,10 @@
 #include <wayland-client.h>
 #include <wayland-server.h>
 #include <wayland-egl.h>
+#include <wlr/egl.h>
 #include <wlr/backend/wayland.h>
 #include <wlr/types/wlr_input_device.h>
 #include <wlr/util/list.h>
-#include "backend/egl.h"
 
 struct wlr_backend_state {
 	/* local state */

include/render/gles2.h

@@ -4,9 +4,16 @@
 #include <string.h>
 #include <stdbool.h>
 #include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+#include <wlr/egl.h>
+#include <wlr/backend.h>
 #include <wlr/render.h>
 #include <wlr/util/log.h>
 
+extern PFNGLEGLIMAGETARGETTEXTURE2DOESPROC glEGLImageTargetTexture2DOES;
+
 struct pixel_format {
 	uint32_t wl_format;
 	GLint gl_format, gl_type;
@@ -14,10 +21,17 @@ struct pixel_format {
 	GLuint *shader;
 };
 
+struct wlr_renderer_state {
+	struct wlr_renderer *renderer;
+	struct wlr_egl *egl;
+};
+
 struct wlr_texture_state {
 	struct wlr_texture *wlr_texture;
+	struct wlr_egl *egl;
 	GLuint tex_id;
 	const struct pixel_format *pixel_format;
+	EGLImageKHR image;
 };
 
 struct shaders {
@@ -25,6 +39,7 @@ struct shaders {
 	GLuint rgba, rgbx;
 	GLuint quad;
 	GLuint ellipse;
+	GLuint external;
 };
 
 extern struct shaders shaders;
@@ -39,6 +54,7 @@ extern const GLchar ellipse_fragment_src[];
 extern const GLchar vertex_src[];
 extern const GLchar fragment_src_rgba[];
 extern const GLchar fragment_src_rgbx[];
+extern const GLchar fragment_src_external[];
 
 bool _gles2_flush_errors(const char *file, int line);
 #define gles2_flush_errors(...) \

include/wlr/backend.h

@@ -3,6 +3,7 @@
 
 #include <wayland-server.h>
 #include <wlr/backend/session.h>
+#include <wlr/egl.h>
 
 struct wlr_backend_impl;
 struct wlr_backend_state;
@@ -22,5 +23,6 @@ struct wlr_backend {
 struct wlr_backend *wlr_backend_autocreate(struct wl_display *display);
 bool wlr_backend_init(struct wlr_backend *backend);
 void wlr_backend_destroy(struct wlr_backend *backend);
+struct wlr_egl *wlr_backend_get_egl(struct wlr_backend *backend);
 
 #endif

include/wlr/backend/interface.h

@@ -3,12 +3,14 @@
 
 #include <stdbool.h>
 #include <wlr/backend.h>
+#include <wlr/egl.h>
 
 struct wlr_backend_state;
 
 struct wlr_backend_impl {
 	bool (*init)(struct wlr_backend_state *state);
 	void (*destroy)(struct wlr_backend_state *state);
+	struct wlr_egl *(*get_egl)(struct wlr_backend_state *state);
 };
 
 struct wlr_backend *wlr_backend_create(const struct wlr_backend_impl *impl,

include/wlr/egl.h

@@ -0,0 +1,75 @@
+#ifndef WLR_EGL_H
+#define WLR_EGL_H
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+#include <stdbool.h>
+
+struct wlr_egl {
+	EGLDisplay display;
+	EGLConfig config;
+	EGLContext context;
+
+	PFNEGLGETPLATFORMDISPLAYEXTPROC get_platform_display;
+	PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC create_platform_window_surface;
+
+	PFNEGLCREATEIMAGEKHRPROC eglCreateImageKHR;
+	PFNEGLDESTROYIMAGEKHRPROC eglDestroyImageKHR;
+	PFNEGLQUERYWAYLANDBUFFERWL eglQueryWaylandBufferWL;
+	PFNEGLBINDWAYLANDDISPLAYWL eglBindWaylandDisplayWL;
+	PFNEGLUNBINDWAYLANDDISPLAYWL eglUnbindWaylandDisplayWL;
+
+	const char *egl_exts;
+	const char *gl_exts;
+
+	struct wl_display *wl_display;
+};
+
+// TODO: Allocate and return a wlr_egl
+/**
+ *  Initializes an egl context for the given platform and remote display.
+ * Will attempt to load all possibly required api functions.
+ */
+bool wlr_egl_init(struct wlr_egl *egl, EGLenum platform, void *display);
+
+/**
+ * Frees all related egl resources, makes the context not-current and
+ * unbinds a bound wayland display.
+ */
+void wlr_egl_free(struct wlr_egl *egl);
+
+/**
+ * Binds the given display to the egl instance.
+ * This will allow clients to create egl surfaces from wayland ones and render to it.
+ */
+bool wlr_egl_bind_display(struct wlr_egl *egl, struct wl_display *local_display);
+
+/**
+ * Refer to the eglQueryWaylandBufferWL extension function.
+ */
+bool wlr_egl_query_buffer(struct wlr_egl *egl, struct wl_resource *buf,
+	EGLint attrib, EGLint *value);
+
+/**
+ * Returns a surface for the given native window
+ * The window must match the remote display the wlr_egl was created with.
+ */
+EGLSurface wlr_egl_create_surface(struct wlr_egl *egl, void *window);
+
+/**
+ * Creates an egl image from the given client buffer and attributes.
+ */
+EGLImageKHR wlr_egl_create_image(struct wlr_egl *egl,
+		EGLenum target, EGLClientBuffer buffer, const EGLint *attribs);
+
+/**
+ * Destroys an egl image created with the given wlr_egl.
+ */
+bool wlr_egl_destroy_image(struct wlr_egl *egl, EGLImageKHR image);
+
+/**
+ * Returns a string for the last error ocurred with egl.
+ */
+const char *egl_error(void);
+
+#endif

include/wlr/render.h

@@ -43,6 +43,11 @@ void wlr_render_colored_ellipse(struct wlr_renderer *r,
  */
 const enum wl_shm_format *wlr_renderer_get_formats(
 		struct wlr_renderer *r, size_t *len);
+/**
+ * Returns true if this wl_buffer is a DRM buffer.
+ */
+bool wlr_renderer_buffer_is_drm(struct wlr_renderer *renderer,
+		struct wl_resource *buffer);
 /**
  * Destroys this wlr_renderer. Textures must be destroyed separately.
  */
@@ -65,7 +70,7 @@ struct wlr_texture {
  * Copies pixels to this texture. The buffer is not accessed after this function
  * returns.
  */
-bool wlr_texture_upload_pixels(struct wlr_texture *surf,
+bool wlr_texture_upload_pixels(struct wlr_texture *tex,
 		enum wl_shm_format format, int stride, int width, int height,
 		const unsigned char *pixels);
 /**
@@ -80,8 +85,17 @@ bool wlr_texture_update_pixels(struct wlr_texture *surf,
  * Copies pixels from a wl_shm_buffer into this texture. The buffer is not
  * accessed after this function returns.
  */
-bool wlr_texture_upload_shm(struct wlr_texture *surf, uint32_t format,
+bool wlr_texture_upload_shm(struct wlr_texture *tex, uint32_t format,
 		struct wl_shm_buffer *shm);
+
+/**
+ * Attaches the contents from the given wl_drm wl_buffer resource onto the
+ * texture. The wl_resource is not used after this call.
+ * Will fail (return false) if the given resource is no drm buffer.
+ */
+ bool wlr_texture_upload_drm(struct wlr_texture *tex,
+ 	struct wl_resource *drm_buffer);
+
 /**
  * Copies a rectangle of pixels from a wl_shm_buffer onto the texture. The
  * buffer is not accessed after this function returns. Under some circumstances,

include/wlr/render/gles2.h

@@ -1,7 +1,9 @@
 #ifndef _WLR_GLES2_RENDERER_H
 #define _WLR_GLES2_RENDERER_H
 #include <wlr/render.h>
+#include <wlr/backend.h>
 
-struct wlr_renderer *wlr_gles2_renderer_init();
+struct wlr_egl;
+struct wlr_renderer *wlr_gles2_renderer_init(struct wlr_backend *backend);
 
 #endif

include/wlr/render/interface.h

@@ -25,6 +25,8 @@ struct wlr_renderer_impl {
 		const float (*color)[4], const float (*matrix)[16]);
 	const enum wl_shm_format *(*formats)(
 		struct wlr_renderer_state *state, size_t *len);
+	bool (*buffer_is_drm)(struct wlr_renderer_state *state,
+		struct wl_resource *buffer);
 	void (*destroy)(struct wlr_renderer_state *state);
 };
 
@@ -42,7 +44,8 @@ struct wlr_texture_impl {
 		struct wl_shm_buffer *shm);
 	bool (*update_shm)(struct wlr_texture_state *surf, uint32_t format,
 		int x, int y, int width, int height, struct wl_shm_buffer *shm);
-	// TODO: egl
+	bool (*upload_drm)(struct wlr_texture_state *state,
+		struct wl_resource *drm_buf);
 	void (*get_matrix)(struct wlr_texture_state *state,
 		float (*matrix)[16], const float (*projection)[16], int x, int y);
 	void (*bind)(struct wlr_texture_state *state);

include/wlr/types/wlr_surface.h

@@ -29,6 +29,7 @@ struct wlr_surface_state {
 
 struct wlr_surface {
 	struct wl_resource *resource;
+	struct wlr_renderer *renderer;
 	struct wlr_texture *texture;
 	struct wlr_surface_state current, pending;
 	const char *role; // the lifetime-bound role or null
@@ -37,11 +38,13 @@ struct wlr_surface {
 	float surface_to_buffer_matrix[16];
 
 	struct {
-		struct wl_signal destroy;
 		struct wl_signal commit;
 	} signals;
 
 	struct wl_list frame_callback_list; // wl_surface.frame
+
+	struct wl_listener compositor_listener; // destroy listener used by compositor
+	void *compositor_data;
 };
 
 struct wlr_renderer;

render/egl.c

@@ -1,9 +1,14 @@
 #include <EGL/egl.h>
 #include <EGL/eglext.h>
-#include <GLES3/gl3.h>
+#include <GLES2/gl2.h>
 #include <gbm.h> // GBM_FORMAT_XRGB8888
+#include <stdlib.h>
 #include <wlr/util/log.h>
-#include "backend/egl.h"
+#include <wlr/egl.h>
+
+// Extension documentation
+// https://www.khronos.org/registry/EGL/extensions/KHR/EGL_KHR_image_base.txt.
+// https://cgit.freedesktop.org/mesa/mesa/tree/docs/specs/WL_bind_wayland_display.spec
 
 const char *egl_error(void) {
 	switch (eglGetError()) {
@@ -42,23 +47,19 @@ const char *egl_error(void) {
 	}
 }
 
-// EGL extensions
+static bool egl_exts(struct wlr_egl *egl) {
-PFNEGLGETPLATFORMDISPLAYEXTPROC get_platform_display;
+	egl->get_platform_display = (PFNEGLGETPLATFORMDISPLAYEXTPROC)
-PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC create_platform_window_surface;
-
-static bool egl_exts() {
-	get_platform_display = (PFNEGLGETPLATFORMDISPLAYEXTPROC)
 		eglGetProcAddress("eglGetPlatformDisplayEXT");
 
-	if (!get_platform_display) {
+	if (!egl->get_platform_display) {
 		wlr_log(L_ERROR, "Failed to load EGL extension 'eglGetPlatformDisplayEXT'");
 		return false;
 	}
 
-	create_platform_window_surface = (PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC)
+	egl->create_platform_window_surface = (PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC)
 		eglGetProcAddress("eglCreatePlatformWindowSurfaceEXT");
 
-	if (!get_platform_display) {
+	if (!egl->get_platform_display) {
 		wlr_log(L_ERROR,
 			"Failed to load EGL extension 'eglCreatePlatformWindowSurfaceEXT'");
 		return false;
@@ -109,8 +110,9 @@ static bool egl_get_config(EGLDisplay disp, EGLConfig *out, EGLenum platform) {
 	return false;
 }
 
-bool wlr_egl_init(struct wlr_egl *egl, EGLenum platform, void *display) {
+bool wlr_egl_init(struct wlr_egl *egl, EGLenum platform,
-	if (!egl_exts()) {
+		void *remote_display) {
+	if (!egl_exts(egl)) {
 		return false;
 	}
 
@@ -119,7 +121,7 @@ bool wlr_egl_init(struct wlr_egl *egl, EGLenum platform, void *display) {
 		goto error;
 	}
 
-	egl->display = get_platform_display(platform, display, NULL);
+	egl->display = egl->get_platform_display(platform, remote_display, NULL);
 	if (egl->display == EGL_NO_DISPLAY) {
 		wlr_log(L_ERROR, "Failed to create EGL display: %s", egl_error());
 		goto error;
@@ -147,11 +149,29 @@ bool wlr_egl_init(struct wlr_egl *egl, EGLenum platform, void *display) {
 	}
 
 	eglMakeCurrent(egl->display, EGL_NO_SURFACE, EGL_NO_SURFACE, egl->context);
+	egl->egl_exts = eglQueryString(egl->display, EGL_EXTENSIONS);
+	if (strstr(egl->egl_exts, "EGL_WL_bind_wayland_display") == NULL ||
+		strstr(egl->egl_exts, "EGL_KHR_image_base") == NULL) {
+		wlr_log(L_ERROR, "Required egl extensions not supported");
+		goto error;
+	}
+
+	egl->eglCreateImageKHR = (PFNEGLCREATEIMAGEKHRPROC)
+		eglGetProcAddress("eglCreateImageKHR");
+	egl->eglDestroyImageKHR = (PFNEGLDESTROYIMAGEKHRPROC)
+		eglGetProcAddress("eglDestroyImageKHR");
+	egl->eglQueryWaylandBufferWL = (PFNEGLQUERYWAYLANDBUFFERWL)
+		(void*) eglGetProcAddress("eglQueryWaylandBufferWL");
+	egl->eglBindWaylandDisplayWL = (PFNEGLBINDWAYLANDDISPLAYWL)
+		(void*) eglGetProcAddress("eglBindWaylandDisplayWL");
+	egl->eglUnbindWaylandDisplayWL = (PFNEGLUNBINDWAYLANDDISPLAYWL)
+		(void*) eglGetProcAddress("eglUnbindWaylandDisplayWL");
+
+	egl->gl_exts = (const char*) glGetString(GL_EXTENSIONS);
 	wlr_log(L_INFO, "Using EGL %d.%d", (int)major, (int)minor);
-	wlr_log(L_INFO, "Supported EGL extensions: %s", eglQueryString(egl->display,
+	wlr_log(L_INFO, "Supported EGL extensions: %s", egl->egl_exts);
-		EGL_EXTENSIONS));
 	wlr_log(L_INFO, "Using %s", glGetString(GL_VERSION));
-	wlr_log(L_INFO, "Supported OpenGL ES extensions: %s", glGetString(GL_EXTENSIONS));
+	wlr_log(L_INFO, "Supported OpenGL ES extensions: %s", egl->gl_exts);
 	return true;
 
 error:
@@ -162,15 +182,58 @@ error:
 }
 
 void wlr_egl_free(struct wlr_egl *egl) {
-	eglMakeCurrent(egl->display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+	if (egl->wl_display && egl->eglUnbindWaylandDisplayWL) {
+		egl->eglUnbindWaylandDisplayWL(egl->display, egl->wl_display);
+	}
+
 	eglDestroyContext(egl->display, egl->context);
 	eglTerminate(egl->display);
 	eglReleaseThread();
 	eglMakeCurrent(EGL_NO_DISPLAY, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
 }
 
+bool wlr_egl_bind_display(struct wlr_egl *egl, struct wl_display *local_display) {
+	if (!egl->eglBindWaylandDisplayWL) {
+		return false;
+	}
+
+	if (egl->eglBindWaylandDisplayWL(egl->display, local_display)) {
+		egl->wl_display = local_display;
+		return true;
+	}
+
+	return false;
+}
+
+bool wlr_egl_query_buffer(struct wlr_egl *egl, struct wl_resource *buf,
+		int attrib, int *value) {
+	if (!egl->eglQueryWaylandBufferWL) {
+		return false;
+	}
+	return egl->eglQueryWaylandBufferWL(egl->display, buf, attrib, value);
+}
+
+EGLImage wlr_egl_create_image(struct wlr_egl *egl, EGLenum target,
+		EGLClientBuffer buffer, const EGLint *attribs) {
+	if (!egl->eglCreateImageKHR) {
+		return false;
+	}
+
+	return egl->eglCreateImageKHR(egl->display, egl->context, target,
+		buffer, attribs);
+}
+
+bool wlr_egl_destroy_image(struct wlr_egl *egl, EGLImage image) {
+	if (!egl->eglDestroyImageKHR) {
+		return false;
+	}
+
+	egl->eglDestroyImageKHR(egl->display, image);
+	return true;
+}
+
 EGLSurface wlr_egl_create_surface(struct wlr_egl *egl, void *window) {
-	EGLSurface surf = create_platform_window_surface(egl->display, egl->config,
+	EGLSurface surf = egl->create_platform_window_surface(egl->display, egl->config,
 		window, NULL);
 	if (surf == EGL_NO_SURFACE) {
 		wlr_log(L_ERROR, "Failed to create EGL surface: %s", egl_error());

render/gles2/renderer.c

@@ -2,14 +2,18 @@
 #include <stdlib.h>
 #include <assert.h>
 #include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
 #include <wayland-util.h>
 #include <wayland-server-protocol.h>
+#include <wlr/egl.h>
+#include <wlr/backend.h>
 #include <wlr/render.h>
 #include <wlr/render/interface.h>
 #include <wlr/render/matrix.h>
 #include <wlr/util/log.h>
 #include "render/gles2.h"
 
+PFNGLEGLIMAGETARGETTEXTURE2DOESPROC glEGLImageTargetTexture2DOES = NULL;
 struct shaders shaders;
 
 static bool compile_shader(GLuint type, const GLchar *src, GLuint *shader) {
@@ -65,13 +69,36 @@ static void init_default_shaders() {
 	if (!compile_program(quad_vertex_src, ellipse_fragment_src, &shaders.ellipse)) {
 		goto error;
 	}
+	if (glEGLImageTargetTexture2DOES) {
+		if (!compile_program(quad_vertex_src, fragment_src_external, &shaders.external)) {
+			goto error;
+		}
+	}
+
 	wlr_log(L_DEBUG, "Compiled default shaders");
 	return;
 error:
 	wlr_log(L_ERROR, "Failed to set up default shaders!");
 }
 
+static void init_image_ext() {
+	if (glEGLImageTargetTexture2DOES)
+		return;
+
+	const char *exts = (const char*) glGetString(GL_EXTENSIONS);
+	if (strstr(exts, "GL_OES_EGL_image_external")) {
+ 		glEGLImageTargetTexture2DOES = (PFNGLEGLIMAGETARGETTEXTURE2DOESPROC)
+			eglGetProcAddress("glEGLImageTargetTexture2DOES");
+	}
+
+	if (!glEGLImageTargetTexture2DOES) {
+		wlr_log(L_INFO, "Failed to load glEGLImageTargetTexture2DOES "
+			"Will not be able to attach drm buffers");
+	}
+}
+
 static void init_globals() {
+	init_image_ext();
 	init_default_shaders();
 }
 
@@ -97,7 +124,7 @@ static void wlr_gles2_end(struct wlr_renderer_state *state) {
 }
 
 static struct wlr_texture *wlr_gles2_texture_init(struct wlr_renderer_state *state) {
-	return gles2_texture_init();
+	return gles2_texture_init(state->egl);
 }
 
 static void draw_quad() {
@@ -169,8 +196,14 @@ static const enum wl_shm_format *wlr_gles2_formats(
 	return formats;
 }
 
+static bool wlr_gles2_buffer_is_drm(struct wlr_renderer_state *state,
+		struct wl_resource *buffer) {
+	EGLint format;
+	return wlr_egl_query_buffer(state->egl, buffer, EGL_TEXTURE_FORMAT, &format);
+}
+
 static void wlr_gles2_destroy(struct wlr_renderer_state *state) {
-	// no-op
+	free(state);
 }
 
 static struct wlr_renderer_impl wlr_renderer_impl = {
@@ -181,10 +214,16 @@ static struct wlr_renderer_impl wlr_renderer_impl = {
 	.render_quad = wlr_gles2_render_quad,
 	.render_ellipse = wlr_gles2_render_ellipse,
 	.formats = wlr_gles2_formats,
+	.buffer_is_drm = wlr_gles2_buffer_is_drm,
 	.destroy = wlr_gles2_destroy
 };
 
-struct wlr_renderer *wlr_gles2_renderer_init() {
+struct wlr_renderer *wlr_gles2_renderer_init(struct wlr_backend *backend) {
 	init_globals();
-	return wlr_renderer_init(NULL, &wlr_renderer_impl);
+	struct wlr_egl *egl = wlr_backend_get_egl(backend);
+	struct wlr_renderer_state *state = calloc(1, sizeof(struct wlr_renderer_state));
+	struct wlr_renderer *renderer = wlr_renderer_init(state, &wlr_renderer_impl);
+	state->renderer = renderer;
+	state->egl = egl;
+	return renderer;
 }

render/gles2/shaders.c

@@ -90,3 +90,13 @@ const GLchar fragment_src_rgbx[] =
 "   gl_FragColor.rgb = alpha * texture2D(tex, v_texcoord).rgb;"
 "   gl_FragColor.a = alpha;"
 "}";
+
+const GLchar fragment_src_external[] =
+"#extension GL_OES_EGL_image_external : require\n"
+"precision mediump float;"
+"uniform samplerExternalOES texture0;"
+"varying vec2 v_uv;"
+"void main() {"
+"  vec4 col = texture2D(texture0, v_uv);"
+"  gl_FragColor = vec4(col.rgb, col.a);"
+"}";

render/gles2/texture.c

@@ -5,12 +5,33 @@
 #include <GLES2/gl2ext.h>
 #include <wayland-util.h>
 #include <wayland-server-protocol.h>
+#include <wlr/egl.h>
 #include <wlr/render.h>
 #include <wlr/render/interface.h>
 #include <wlr/render/matrix.h>
 #include <wlr/util/log.h>
 #include "render/gles2.h"
 
+static struct pixel_format external_pixel_format = {
+	.wl_format = 0,
+	.depth = 0,
+	.bpp = 0,
+	.gl_format = 0,
+	.gl_type = 0,
+	.shader = &shaders.external
+};
+
+static void gles2_texture_gen_texture(struct wlr_texture_state *surface) {
+	if (surface->tex_id) {
+		return;
+	}
+
+	GL_CALL(glGenTextures(1, &surface->tex_id));
+	GL_CALL(glBindTexture(GL_TEXTURE_2D, surface->tex_id));
+	GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
+	GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
+}
+
 static bool gles2_texture_upload_pixels(struct wlr_texture_state *texture,
 		enum wl_shm_format format, int stride, int width, int height,
 		const unsigned char *pixels) {
@@ -24,7 +45,8 @@ static bool gles2_texture_upload_pixels(struct wlr_texture_state *texture,
 	texture->wlr_texture->height = height;
 	texture->wlr_texture->format = format;
 	texture->pixel_format = fmt;
-	GL_CALL(glGenTextures(1, &texture->tex_id));
+
+	gles2_texture_gen_texture(texture);
 	GL_CALL(glBindTexture(GL_TEXTURE_2D, texture->tex_id));
 	GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, stride));
 	GL_CALL(glTexImage2D(GL_TEXTURE_2D, 0, fmt->gl_format, width, height, 0,
@@ -74,7 +96,7 @@ static bool gles2_texture_upload_shm(struct wlr_texture_state *texture,
 	texture->wlr_texture->format = format;
 	texture->pixel_format = fmt;
 
-	GL_CALL(glGenTextures(1, &texture->tex_id));
+	gles2_texture_gen_texture(texture);
 	GL_CALL(glBindTexture(GL_TEXTURE_2D, texture->tex_id));
 	GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, pitch));
 	GL_CALL(glPixelStorei(GL_UNPACK_SKIP_PIXELS_EXT, 0));
@@ -113,6 +135,64 @@ static bool gles2_texture_update_shm(struct wlr_texture_state *texture,
 	GL_CALL(glPixelStorei(GL_UNPACK_SKIP_ROWS_EXT, 0));
 
 	wl_shm_buffer_end_access(buffer);
+
+	return true;
+}
+
+static bool gles2_texture_upload_drm(struct wlr_texture_state *tex,
+		struct wl_resource *buf) {
+	if (!glEGLImageTargetTexture2DOES) {
+		return false;
+	}
+
+	EGLint format;
+	if (!wlr_egl_query_buffer(tex->egl, buf, EGL_TEXTURE_FORMAT, &format)) {
+		wlr_log(L_INFO, "upload_drm called with no drm buffer");
+		return false;
+	}
+
+	wlr_egl_query_buffer(tex->egl, buf, EGL_WIDTH,
+			(EGLint*)&tex->wlr_texture->width);
+	wlr_egl_query_buffer(tex->egl, buf, EGL_HEIGHT,
+			(EGLint*)&tex->wlr_texture->height);
+
+	EGLint inverted_y;
+	wlr_egl_query_buffer(tex->egl, buf, EGL_WAYLAND_Y_INVERTED_WL, &inverted_y);
+
+	GLenum target;
+	const struct pixel_format *pf;
+	switch (format) {
+	case EGL_TEXTURE_RGB:
+	case EGL_TEXTURE_RGBA:
+		target = GL_TEXTURE_2D;
+		pf = gl_format_for_wl_format(WL_SHM_FORMAT_ARGB8888);
+		break;
+	case EGL_TEXTURE_EXTERNAL_WL:
+		target = GL_TEXTURE_EXTERNAL_OES;
+		pf = &external_pixel_format;
+		break;
+	default:
+		wlr_log(L_ERROR, "invalid/unsupported egl buffer format");
+		return false;
+	}
+
+	gles2_texture_gen_texture(tex);
+	GL_CALL(glBindTexture(GL_TEXTURE_2D, tex->tex_id));
+
+	EGLint attribs[] = { EGL_WAYLAND_PLANE_WL, 0, EGL_NONE };
+	tex->image = wlr_egl_create_image(tex->egl, EGL_WAYLAND_BUFFER_WL,
+		(EGLClientBuffer*) buf, attribs);
+	if (!tex->image) {
+		wlr_log(L_ERROR, "failed to create egl image: %s", egl_error());
+ 		return false;
+	}
+
+	GL_CALL(glActiveTexture(GL_TEXTURE0));
+	GL_CALL(glBindTexture(target, tex->tex_id));
+	GL_CALL(glEGLImageTargetTexture2DOES(target, tex->image));
+	tex->wlr_texture->valid = true;
+	tex->pixel_format = pf;
+
 	return true;
 }
 
@@ -146,15 +226,17 @@ static struct wlr_texture_impl wlr_texture_impl = {
 	.update_pixels = gles2_texture_update_pixels,
 	.upload_shm = gles2_texture_upload_shm,
 	.update_shm = gles2_texture_update_shm,
+	.upload_drm = gles2_texture_upload_drm,
 	.get_matrix = gles2_texture_get_matrix,
 	.bind = gles2_texture_bind,
 	.destroy = gles2_texture_destroy,
 };
 
-struct wlr_texture *gles2_texture_init() {
+struct wlr_texture *gles2_texture_init(struct wlr_egl *egl) {
 	struct wlr_texture_state *state = calloc(sizeof(struct wlr_texture_state), 1);
 	struct wlr_texture *texture = wlr_texture_init(state, &wlr_texture_impl);
 	state->wlr_texture = texture;
+	state->egl = egl;
 	wl_signal_init(&texture->destroy_signal);
 	return texture;
 }

render/meson.build

@@ -1,10 +1,11 @@
 wlr_files += files(
+    'egl.c',
     'matrix.c',
-    'wlr_renderer.c',
-    'wlr_texture.c',
     'gles2/pixel_format.c',
     'gles2/renderer.c',
     'gles2/shaders.c',
     'gles2/texture.c',
     'gles2/util.c',
+    'wlr_renderer.c',
+    'wlr_texture.c',
 )

render/wlr_renderer.c

@@ -46,3 +46,8 @@ const enum wl_shm_format *wlr_renderer_get_formats(
 		struct wlr_renderer *r, size_t *len) {
 	return r->impl->formats(r->state, len);
 }
+
+bool wlr_renderer_buffer_is_drm(struct wlr_renderer *r,
+		struct wl_resource *buffer) {
+	return r->impl->buffer_is_drm(r->state, buffer);
+}

render/wlr_texture.c

@@ -43,6 +43,11 @@ bool wlr_texture_update_shm(struct wlr_texture *texture, uint32_t format,
 			x, y, width, height, shm);
 }
 
+bool wlr_texture_upload_drm(struct wlr_texture *texture,
+		struct wl_resource *drm_buffer) {
+	return texture->impl->upload_drm(texture->state, drm_buffer);
+}
+
 void wlr_texture_get_matrix(struct wlr_texture *texture,
 		float (*matrix)[16], const float (*projection)[16], int x, int y) {
 	texture->impl->get_matrix(texture->state, matrix, projection, x, y);

types/wlr_output.c

@@ -133,6 +133,7 @@ bool wlr_output_set_cursor(struct wlr_output *output,
 		return true;
 	}
 
+	/*
 	wlr_log(L_INFO, "Falling back to software cursor");
 
 	output->cursor.is_sw = true;
@@ -149,8 +150,9 @@ bool wlr_output_set_cursor(struct wlr_output *output,
 
 	wlr_texture_upload_pixels(output->cursor.texture, WL_SHM_FORMAT_ARGB8888,
 		stride, width, height, buf);
+	*/
 
-	return true;
+	return false;
 }
 
 bool wlr_output_move_cursor(struct wlr_output *output, int x, int y) {

types/wlr_surface.c

@@ -2,6 +2,7 @@
 #include <stdlib.h>
 #include <wayland-server.h>
 #include <wlr/util/log.h>
+#include <wlr/egl.h>
 #include <wlr/render/interface.h>
 #include <wlr/types/wlr_surface.h>
 
@@ -123,9 +124,14 @@ void wlr_surface_flush_damage(struct wlr_surface *surface) {
 	}
 	struct wl_shm_buffer *buffer = wl_shm_buffer_get(surface->current.buffer);
 	if (!buffer) {
+		if (wlr_renderer_buffer_is_drm(surface->renderer, surface->pending.buffer)) {
+			wlr_texture_upload_drm(surface->texture, surface->pending.buffer);
+			goto release;
+		} else {
 			wlr_log(L_INFO, "Unknown buffer handle attached");
 			return;
 		}
+	}
 	pixman_region32_t damage = surface->current.surface_damage;
 	if (!pixman_region32_not_empty(&damage)) {
 		goto release;
@@ -182,23 +188,23 @@ const struct wl_surface_interface surface_interface = {
 
 static void destroy_surface(struct wl_resource *resource) {
 	struct wlr_surface *surface = wl_resource_get_user_data(resource);
-	wl_signal_emit(&surface->signals.destroy, surface);
-	wlr_texture_destroy(surface->texture);
 
+	wlr_texture_destroy(surface->texture);
 	struct wlr_frame_callback *cb, *next;
 	wl_list_for_each_safe(cb, next, &surface->frame_callback_list, link) {
 		wl_resource_destroy(cb->resource);
 	}
+
 	free(surface);
 }
 
 struct wlr_surface *wlr_surface_create(struct wl_resource *res,
 		struct wlr_renderer *renderer) {
 	struct wlr_surface *surface = calloc(1, sizeof(struct wlr_surface));
+	surface->renderer = renderer;
 	surface->texture = wlr_render_texture_init(renderer);
 	surface->resource = res;
 	wl_signal_init(&surface->signals.commit);
-	wl_signal_init(&surface->signals.destroy);
 	wl_list_init(&surface->frame_callback_list);
 	wl_resource_set_implementation(res, &surface_interface,
 			surface, destroy_surface);