Refactor EGL handling

26 files changed, 156 insertions, 98 deletions

diff --git a/backend/backend.c b/backend/backend.c
index 4da3fe7a..dc34c80b 100644
--- a/backend/backend.c
+++ b/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) {
diff --git a/backend/drm/backend.c b/backend/drm/backend.c
index bcc81624..a7e6824c 100644
--- a/backend/drm/backend.c
+++ b/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) {
diff --git a/backend/drm/drm.c b/backend/drm/drm.c
index e11751e2..927388b0 100644
--- a/backend/drm/drm.c
+++ b/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(&output->renderer->egl);
+		plane->wlr_rend = wlr_gles2_renderer_init(drm->base);
 		if (!plane->wlr_rend) {
 			return false;
 		}
diff --git a/backend/meson.build b/backend/meson.build
index bb1b84c8..9c6b70df 100644
--- a/backend/meson.build
+++ b/backend/meson.build
@@ -1,6 +1,5 @@
 wlr_files += files(
     'backend.c',
-    'egl.c',
     'udev.c',
     'session/direct-ipc.c',
     'session/direct.c',
diff --git a/backend/multi/backend.c b/backend/multi/backend.c
index 19839629..9563356d 100644
--- a/backend/multi/backend.c
+++ b/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,
diff --git a/backend/wayland/backend.c b/backend/wayland/backend.c
index a0fb0be6..1a156802 100644
--- a/backend/wayland/backend.c
+++ b/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>
@@ -95,9 +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) {
diff --git a/examples/compositor/main.c b/examples/compositor/main.c
index fd592600..f115d267 100644
--- a/examples/compositor/main.c
+++ b/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);
diff --git a/examples/rotation.c b/examples/rotation.c
index 34994e04..e4c3f87f 100644
--- a/examples/rotation.c
+++ b/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);
diff --git a/examples/tablet.c b/examples/tablet.c
index 4a7d9f74..0651efde 100644
--- a/examples/tablet.c
+++ b/examples/tablet.c
@@ -152,7 +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);
diff --git a/examples/touch.c b/examples/touch.c
index 76b92ad2..9dd2fe57 100644
--- a/examples/touch.c
+++ b/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);
diff --git a/include/backend/drm.h b/include/backend/drm.h
index 2f724524..35265e21 100644
--- a/include/backend/drm.h
+++ b/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"
 
diff --git a/include/backend/wayland.h b/include/backend/wayland.h
index 792bad37..e6339a23 100644
--- a/include/backend/wayland.h
+++ b/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 */
diff --git a/include/render/gles2.h b/include/render/gles2.h
index cb78a181..3006872c 100644
--- a/include/render/gles2.h
+++ b/include/render/gles2.h
@@ -7,6 +7,8 @@
 #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>
 
@@ -19,8 +21,14 @@ 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;
diff --git a/include/wlr/backend.h b/include/wlr/backend.h
index 3910e406..ce5b2568 100644
--- a/include/wlr/backend.h
+++ b/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
diff --git a/include/wlr/backend/interface.h b/include/wlr/backend/interface.h
index 15cfb6c3..e791bdcf 100644
--- a/include/wlr/backend/interface.h
+++ b/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,
diff --git a/include/backend/egl.h b/include/wlr/egl.h
index b649c55b..b37317a5 100644
--- a/include/backend/egl.h
+++ b/include/wlr/egl.h
@@ -1,5 +1,5 @@
-#ifndef WLR_BACKEND_EGL_H
-#define WLR_BACKEND_EGL_H
+#ifndef WLR_EGL_H
+#define WLR_EGL_H
 
 #include <EGL/egl.h>
 #include <EGL/eglext.h>
@@ -10,12 +10,22 @@ struct wlr_egl {
 	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.
@@ -35,15 +45,9 @@ void wlr_egl_free(struct wlr_egl *egl);
 bool wlr_egl_bind_display(struct wlr_egl *egl, struct wl_display *local_display);
 
 /**
- * Queries information about the given (potential egl/drm) buffer, returns
- * the information in value.
- * Refer to eglQueryWaylandBufferWL for more information about attrib and value.
- * Makes only sense when a wl_display was bound to it since otherwise there
- * cannot be any egl/drm buffers.
- * Will only work after a wlr_egl objct was initialized and if the needed egl extension
- * is present.
+ * Refer to the eglQueryWaylandBufferWL extension function.
  */
-bool wlr_egl_query_buffer(struct wl_resource *buf,
+bool wlr_egl_query_buffer(struct wlr_egl *egl, struct wl_resource *buf,
 	EGLint attrib, EGLint *value);
 
 /**
@@ -54,16 +58,14 @@ EGLSurface wlr_egl_create_surface(struct wlr_egl *egl, void *window);
 
 /**
  * Creates an egl image from the given client buffer and attributes.
- * Will only work after a wlr_egl objct was initialized and if the needed egl extension
- * is present.
  */
-EGLImageKHR wlr_egl_create_image(EGLenum target, EGLClientBuffer buffer,
-	const EGLint *attribs);
+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(EGLImageKHR image);
+bool wlr_egl_destroy_image(struct wlr_egl *egl, EGLImageKHR image);
 
 /**
  * Returns a string for the last error ocurred with egl.
diff --git a/include/wlr/render.h b/include/wlr/render.h
index 47e2ff57..5e9f889e 100644
--- a/include/wlr/render.h
+++ b/include/wlr/render.h
@@ -44,6 +44,11 @@ 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.
  */
 void wlr_renderer_destroy(struct wlr_renderer *renderer);
diff --git a/include/wlr/render/gles2.h b/include/wlr/render/gles2.h
index 43d4719e..b368d6e1 100644
--- a/include/wlr/render/gles2.h
+++ b/include/wlr/render/gles2.h
@@ -1,8 +1,9 @@
 #ifndef _WLR_GLES2_RENDERER_H
 #define _WLR_GLES2_RENDERER_H
 #include <wlr/render.h>
+#include <wlr/backend.h>
 
 struct wlr_egl;
-struct wlr_renderer *wlr_gles2_renderer_init();
+struct wlr_renderer *wlr_gles2_renderer_init(struct wlr_backend *backend);
 
 #endif
diff --git a/include/wlr/render/interface.h b/include/wlr/render/interface.h
index 4a4b22e2..69485e21 100644
--- a/include/wlr/render/interface.h
+++ b/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);
 };
 
diff --git a/include/wlr/types/wlr_surface.h b/include/wlr/types/wlr_surface.h
index c9cbeba6..94b7ff1e 100644
--- a/include/wlr/types/wlr_surface.h
+++ b/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
diff --git a/backend/egl.c b/render/egl.c
index 15a2c58e..73680d1d 100644
--- a/backend/egl.c
+++ b/render/egl.c
@@ -4,14 +4,12 @@
 #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
 
-struct wlr_egl *egl_global;
-
 const char *egl_error(void) {
 	switch (eglGetError()) {
 	case EGL_SUCCESS:
@@ -49,29 +47,19 @@ const char *egl_error(void) {
 	}
 }
 
-// EGL extensions
-PFNEGLGETPLATFORMDISPLAYEXTPROC get_platform_display;
-PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC create_platform_window_surface;
-
-PFNEGLCREATEIMAGEKHRPROC eglCreateImageKHR;
-PFNEGLDESTROYIMAGEKHRPROC eglDestroyImageKHR;
-PFNEGLQUERYWAYLANDBUFFERWL eglQueryWaylandBufferWL;
-PFNEGLBINDWAYLANDDISPLAYWL eglBindWaylandDisplayWL;
-PFNEGLUNBINDWAYLANDDISPLAYWL eglUnbindWaylandDisplayWL;
-
-static bool egl_exts() {
-	get_platform_display = (PFNEGLGETPLATFORMDISPLAYEXTPROC)
+static bool egl_exts(struct wlr_egl *egl) {
+	egl->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;
@@ -124,7 +112,7 @@ static bool egl_get_config(EGLDisplay disp, EGLConfig *out, EGLenum platform) {
 
 bool wlr_egl_init(struct wlr_egl *egl, EGLenum platform,
 		void *remote_display) {
-	if (!egl_exts()) {
+	if (!egl_exts(egl)) {
 		return false;
 	}
 
@@ -133,7 +121,7 @@ bool wlr_egl_init(struct wlr_egl *egl, EGLenum platform,
 		goto error;
 	}
 
-	egl->display = get_platform_display(platform, remote_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;
@@ -168,19 +156,17 @@ bool wlr_egl_init(struct wlr_egl *egl, EGLenum platform,
 		goto error;
 	}
 
-	eglCreateImageKHR = (PFNEGLCREATEIMAGEKHRPROC)
+	egl->eglCreateImageKHR = (PFNEGLCREATEIMAGEKHRPROC)
 		eglGetProcAddress("eglCreateImageKHR");
-	eglDestroyImageKHR = (PFNEGLDESTROYIMAGEKHRPROC)
+	egl->eglDestroyImageKHR = (PFNEGLDESTROYIMAGEKHRPROC)
 		eglGetProcAddress("eglDestroyImageKHR");
-	eglQueryWaylandBufferWL = (PFNEGLQUERYWAYLANDBUFFERWL)
+	egl->eglQueryWaylandBufferWL = (PFNEGLQUERYWAYLANDBUFFERWL)
 		(void*) eglGetProcAddress("eglQueryWaylandBufferWL");
-	eglBindWaylandDisplayWL = (PFNEGLBINDWAYLANDDISPLAYWL)
+	egl->eglBindWaylandDisplayWL = (PFNEGLBINDWAYLANDDISPLAYWL)
 		(void*) eglGetProcAddress("eglBindWaylandDisplayWL");
-	eglUnbindWaylandDisplayWL = (PFNEGLUNBINDWAYLANDDISPLAYWL)
+	egl->eglUnbindWaylandDisplayWL = (PFNEGLUNBINDWAYLANDDISPLAYWL)
 		(void*) eglGetProcAddress("eglUnbindWaylandDisplayWL");
 
-	egl_global = egl;
-
 	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", egl->egl_exts);
@@ -196,25 +182,22 @@ error:
 }
 
 void wlr_egl_free(struct wlr_egl *egl) {
-	if (egl->wl_display && eglUnbindWaylandDisplayWL) {
-		eglUnbindWaylandDisplayWL(egl->display, egl->wl_display);
+	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);
-
-	if (egl_global == egl)
-		egl_global = NULL;
 }
 
 bool wlr_egl_bind_display(struct wlr_egl *egl, struct wl_display *local_display) {
-	if (!eglBindWaylandDisplayWL) {
+	if (!egl->eglBindWaylandDisplayWL) {
 		return false;
 	}
 
-	if (eglBindWaylandDisplayWL(egl->display, local_display)) {
+	if (egl->eglBindWaylandDisplayWL(egl->display, local_display)) {
 		egl->wl_display = local_display;
 		return true;
 	}
@@ -222,35 +205,35 @@ bool wlr_egl_bind_display(struct wlr_egl *egl, struct wl_display *local_display)
 	return false;
 }
 
-bool wlr_egl_query_buffer(struct wl_resource *buf, int attrib, int *value) {
-	if (!egl_global || !eglQueryWaylandBufferWL) {
+bool wlr_egl_query_buffer(struct wlr_egl *egl, struct wl_resource *buf,
+		int attrib, int *value) {
+	if (!egl->eglQueryWaylandBufferWL) {
 		return false;
 	}
-
-	return eglQueryWaylandBufferWL(egl_global->display, buf, attrib, value);
+	return egl->eglQueryWaylandBufferWL(egl->display, buf, attrib, value);
 }
 
-EGLImage wlr_egl_create_image(EGLenum target,
+EGLImage wlr_egl_create_image(struct wlr_egl *egl, EGLenum target,
 		EGLClientBuffer buffer, const EGLint *attribs) {
-	if (!egl_global || !eglCreateImageKHR) {
+	if (!egl->eglCreateImageKHR) {
 		return false;
 	}
 
-	return eglCreateImageKHR(egl_global->display, egl_global->context, target,
+	return egl->eglCreateImageKHR(egl->display, egl->context, target,
 		buffer, attribs);
 }
 
-bool wlr_egl_destroy_image(EGLImage image) {
-	if (!egl_global || !eglDestroyImageKHR) {
+bool wlr_egl_destroy_image(struct wlr_egl *egl, EGLImage image) {
+	if (!egl->eglDestroyImageKHR) {
 		return false;
 	}
 
-	eglDestroyImageKHR(egl_global->display, image);
+	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());
diff --git a/render/gles2/renderer.c b/render/gles2/renderer.c
index 0de777cc..237dc67b 100644
--- a/render/gles2/renderer.c
+++ b/render/gles2/renderer.c
@@ -5,11 +5,12 @@
 #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 "backend/egl.h"
 #include "render/gles2.h"
 
 PFNGLEGLIMAGETARGETTEXTURE2DOESPROC glEGLImageTargetTexture2DOES = NULL;
@@ -123,7 +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() {
@@ -195,8 +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 = {
@@ -207,10 +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_egl *egl) {
+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;
 }
diff --git a/render/gles2/texture.c b/render/gles2/texture.c
index 2a2073c6..f2c88af5 100644
--- a/render/gles2/texture.c
+++ b/render/gles2/texture.c
@@ -5,12 +5,12 @@
 #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"
-#include "backend/egl.h"
 
 static struct pixel_format external_pixel_format = {
 	.wl_format = 0,
@@ -139,23 +139,25 @@ static bool gles2_texture_update_shm(struct wlr_texture_state *texture,
 	return true;
 }
 
-static bool gles2_texture_upload_drm(struct wlr_texture_state *texture,
-		struct wl_resource* buf) {
+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(buf, EGL_TEXTURE_FORMAT, &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(buf, EGL_WIDTH, (EGLint*) &texture->wlr_texture->width);
-	wlr_egl_query_buffer(buf, EGL_HEIGHT, (EGLint*) &texture->wlr_texture->height);
+	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(buf, EGL_WAYLAND_Y_INVERTED_WL, &inverted_y);
+	wlr_egl_query_buffer(tex->egl, buf, EGL_WAYLAND_Y_INVERTED_WL, &inverted_y);
 
 	GLenum target;
 	const struct pixel_format *pf;
@@ -174,22 +176,22 @@ static bool gles2_texture_upload_drm(struct wlr_texture_state *texture,
 		return false;
 	}
 
-	gles2_texture_gen_texture(texture);
-	GL_CALL(glBindTexture(GL_TEXTURE_2D, texture->tex_id));
+	gles2_texture_gen_texture(tex);
+	GL_CALL(glBindTexture(GL_TEXTURE_2D, tex->tex_id));
 
 	EGLint attribs[] = { EGL_WAYLAND_PLANE_WL, 0, EGL_NONE };
-	texture->image = wlr_egl_create_image(EGL_WAYLAND_BUFFER_WL,
+	tex->image = wlr_egl_create_image(tex->egl, EGL_WAYLAND_BUFFER_WL,
 		(EGLClientBuffer*) buf, attribs);
-	if (!texture->image) {
+	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, texture->tex_id));
-	GL_CALL(glEGLImageTargetTexture2DOES(target, texture->image));
-	texture->wlr_texture->valid = true;
-	texture->pixel_format = pf;
+	GL_CALL(glBindTexture(target, tex->tex_id));
+	GL_CALL(glEGLImageTargetTexture2DOES(target, tex->image));
+	tex->wlr_texture->valid = true;
+	tex->pixel_format = pf;
 
 	return true;
 }
@@ -230,10 +232,11 @@ static struct wlr_texture_impl wlr_texture_impl = {
 	.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;
 }
diff --git a/render/meson.build b/render/meson.build
index 93bf8b4b..a0a44ea2 100644
--- a/render/meson.build
+++ b/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',
 )
diff --git a/render/wlr_renderer.c b/render/wlr_renderer.c
index 8418fd5b..640d737e 100644
--- a/render/wlr_renderer.c
+++ b/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);
+}
diff --git a/types/wlr_surface.c b/types/wlr_surface.c
index 1ce4926e..cc3b429d 100644
--- a/types/wlr_surface.c
+++ b/types/wlr_surface.c
@@ -2,9 +2,9 @@
 #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>
-#include "backend/egl.h"
 
 static void surface_destroy(struct wl_client *client, struct wl_resource *resource) {
 	wl_resource_destroy(resource);
@@ -124,8 +124,7 @@ void wlr_surface_flush_damage(struct wlr_surface *surface) {
 	}
 	struct wl_shm_buffer *buffer = wl_shm_buffer_get(surface->current.buffer);
 	if (!buffer) {
-		EGLint format;
-		if (wlr_egl_query_buffer(surface->current.buffer, EGL_TEXTURE_FORMAT, &format)) {
+		if (wlr_renderer_buffer_is_drm(surface->renderer, surface->pending.buffer)) {
 			wlr_texture_upload_drm(surface->texture, surface->pending.buffer);
 			goto release;
 		} else {
@@ -202,6 +201,7 @@ static void destroy_surface(struct wl_resource *resource) {
 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);