26 files changed, 322 insertions, 46 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ae2397b2..b15882ce 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -63,4 +63,4 @@ add_subdirectory(session)
 add_subdirectory(render)
 add_subdirectory(util)
 
-add_subdirectory(example)
+add_subdirectory(examples)
diff --git a/example/CMakeLists.txt b/examples/CMakeLists.txt
index fff2e49b..f3f555c3 100644
--- a/example/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -65,3 +65,17 @@ target_link_libraries(tablet
     wlr-render
     ${XKBCOMMON_LIBRARIES}
 )
+
+add_executable(compositor
+    compositor/main.c
+    compositor/wl_compositor.c
+    compositor/wl_shell.c
+    shared.c
+)
+
+target_link_libraries(compositor
+    wlr-backend
+    wlr-session
+    wlr-render
+    ${XKBCOMMON_LIBRARIES}
+)
diff --git a/example/cat.c b/examples/cat.c
index 0a4dba9e..0a4dba9e 100644
--- a/example/cat.c
+++ b/examples/cat.c
diff --git a/example/cat.h b/examples/cat.h
index 6db307fd..6db307fd 100644
--- a/example/cat.h
+++ b/examples/cat.h
diff --git a/examples/compositor.h b/examples/compositor.h
new file mode 100644
index 00000000..4773b83d
--- /dev/null
+++ b/examples/compositor.h
@@ -0,0 +1,21 @@
+#ifndef _EXAMPLE_COMPOSITOR_H
+#define _EXAMPLE_COMPOSITOR_H
+#include <wayland-server.h>
+
+struct wl_compositor_state {
+	struct wl_global *wl_global;
+	struct wl_list wl_resources;
+};
+
+void wl_compositor_init(struct wl_display *display,
+		struct wl_compositor_state *state);
+
+struct wl_shell_state {
+	struct wl_global *wl_global;
+	struct wl_list wl_resources;
+};
+
+void wl_shell_init(struct wl_display *display,
+		struct wl_shell_state *state);
+
+#endif
diff --git a/examples/compositor/main.c b/examples/compositor/main.c
new file mode 100644
index 00000000..6a689669
--- /dev/null
+++ b/examples/compositor/main.c
@@ -0,0 +1,49 @@
+#define _POSIX_C_SOURCE 199309L
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <inttypes.h>
+#include <wayland-server.h>
+#include <wlr/backend.h>
+#include <wlr/session.h>
+#include <wlr/render.h>
+#include <wlr/render/gles2.h>
+#include <wlr/types/wlr_output.h>
+#include <xkbcommon/xkbcommon.h>
+#include "shared.h"
+#include "compositor.h"
+
+struct sample_state {
+	struct wlr_renderer *renderer;
+	struct wl_compositor_state compositor;
+	struct wl_shell_state shell;
+};
+
+void handle_output_frame(struct output_state *output, struct timespec *ts) {
+	struct compositor_state *state = output->compositor;
+	struct sample_state *sample = state->data;
+	struct wlr_output *wlr_output = output->output;
+
+	wlr_output_make_current(wlr_output);
+	wlr_renderer_begin(sample->renderer, wlr_output);
+	// TODO: render surfaces
+	wlr_renderer_end(sample->renderer);
+	wlr_output_swap_buffers(wlr_output);
+}
+
+int main() {
+	struct sample_state state = { 0 };
+	struct compositor_state compositor = { 0,
+		.data = &state,
+		.output_frame_cb = handle_output_frame,
+	};
+	compositor_init(&compositor);
+
+	state.renderer = wlr_gles2_renderer_init();
+	wl_display_init_shm(compositor.display);
+	wl_compositor_init(compositor.display, &state.compositor);
+	wl_shell_init(compositor.display, &state.shell);
+
+	compositor_run(&compositor);
+}
diff --git a/examples/compositor/wl_compositor.c b/examples/compositor/wl_compositor.c
new file mode 100644
index 00000000..0cd73afb
--- /dev/null
+++ b/examples/compositor/wl_compositor.c
@@ -0,0 +1,55 @@
+#include <assert.h>
+#include <wayland-server.h>
+#include <wlr/util/log.h>
+#include "compositor.h"
+
+static void wl_compositor_create_surface(struct wl_client *client,
+			   struct wl_resource *resource, uint32_t id) {
+	wlr_log(L_DEBUG, "TODO: implement create_surface");
+}
+
+static void wl_compositor_create_region(struct wl_client *client,
+			  struct wl_resource *resource, uint32_t id) {
+	wlr_log(L_DEBUG, "TODO: implement create_region");
+}
+
+struct wl_compositor_interface wl_compositor_impl = {
+	.create_surface = wl_compositor_create_surface,
+	.create_region = wl_compositor_create_region
+};
+
+static void wl_compositor_destroy(struct wl_resource *resource) {
+	struct wl_compositor_state *state = wl_resource_get_user_data(resource);
+	struct wl_resource *_resource = NULL;
+	wl_resource_for_each(_resource, &state->wl_resources) {
+		if (_resource == resource) {
+			struct wl_list *link = wl_resource_get_link(_resource);
+			wl_list_remove(link);
+			break;
+		}
+	}
+}
+
+static void wl_compositor_bind(struct wl_client *wl_client, void *_state,
+		uint32_t version, uint32_t id) {
+	struct wl_compositor_state *state = _state;
+	assert(wl_client && state);
+	if (version > 4) {
+		wlr_log(L_ERROR, "Client requested unsupported wl_compositor version, disconnecting");
+		wl_client_destroy(wl_client);
+		return;
+	}
+	struct wl_resource *wl_resource = wl_resource_create(
+			wl_client, &wl_compositor_interface, version, id);
+	wl_resource_set_implementation(wl_resource, &wl_compositor_impl,
+			state, wl_compositor_destroy);
+	wl_list_insert(&state->wl_resources, wl_resource_get_link(wl_resource));
+}
+
+void wl_compositor_init(struct wl_display *display,
+		struct wl_compositor_state *state) {
+	struct wl_global *wl_global = wl_global_create(display,
+		&wl_compositor_interface, 4, state, wl_compositor_bind);
+	state->wl_global = wl_global;
+	wl_list_init(&state->wl_resources);
+}
diff --git a/examples/compositor/wl_shell.c b/examples/compositor/wl_shell.c
new file mode 100644
index 00000000..f2ec3c56
--- /dev/null
+++ b/examples/compositor/wl_shell.c
@@ -0,0 +1,50 @@
+#include <assert.h>
+#include <wayland-server.h>
+#include <wlr/util/log.h>
+#include "compositor.h"
+
+void wl_shell_get_shell_surface(struct wl_client *client,
+				  struct wl_resource *resource, uint32_t id,
+				  struct wl_resource *surface) {
+	wlr_log(L_DEBUG, "TODO: implement get_shell_surface");
+}
+
+static struct wl_shell_interface wl_shell_impl = {
+	.get_shell_surface = wl_shell_get_shell_surface
+};
+
+static void wl_shell_destroy(struct wl_resource *resource) {
+	struct wl_shell_state *state = wl_resource_get_user_data(resource);
+	struct wl_resource *_resource = NULL;
+	wl_resource_for_each(_resource, &state->wl_resources) {
+		if (_resource == resource) {
+			struct wl_list *link = wl_resource_get_link(_resource);
+			wl_list_remove(link);
+			break;
+		}
+	}
+}
+
+static void wl_shell_bind(struct wl_client *wl_client, void *_state,
+		uint32_t version, uint32_t id) {
+	struct wl_shell_state *state = _state;
+	assert(wl_client && state);
+	if (version > 1) {
+		wlr_log(L_ERROR, "Client requested unsupported wl_shell version, disconnecting");
+		wl_client_destroy(wl_client);
+		return;
+	}
+	struct wl_resource *wl_resource = wl_resource_create(
+			wl_client, &wl_shell_interface, version, id);
+	wl_resource_set_implementation(wl_resource, &wl_shell_impl,
+			state, wl_shell_destroy);
+	wl_list_insert(&state->wl_resources, wl_resource_get_link(wl_resource));
+}
+
+void wl_shell_init(struct wl_display *display,
+		struct wl_shell_state *state) {
+	struct wl_global *wl_global = wl_global_create(display,
+		&wl_shell_interface, 1, state, wl_shell_bind);
+	state->wl_global = wl_global;
+	wl_list_init(&state->wl_resources);
+}
diff --git a/example/pointer.c b/examples/pointer.c
index c7518841..c7518841 100644
--- a/example/pointer.c
+++ b/examples/pointer.c
diff --git a/example/rotation.c b/examples/rotation.c
index 2dd148d0..1b75ccaf 100644
--- a/example/rotation.c
+++ b/examples/rotation.c
@@ -206,7 +206,7 @@ int main(int argc, char *argv[]) {
 
 	state.renderer = wlr_gles2_renderer_init();
 	state.cat_texture = wlr_render_surface_init(state.renderer);
-	wlr_surface_attach_pixels(state.cat_texture, GL_RGBA,
+	wlr_surface_attach_pixels(state.cat_texture, WL_SHM_FORMAT_ABGR8888,
 		cat_tex.width, cat_tex.width, cat_tex.height, cat_tex.pixel_data);
 
 	compositor_run(&compositor);
diff --git a/example/shared.c b/examples/shared.c
index fbb6c559..fbb6c559 100644
--- a/example/shared.c
+++ b/examples/shared.c
diff --git a/example/shared.h b/examples/shared.h
index 37f52dcc..1633f2c8 100644
--- a/example/shared.h
+++ b/examples/shared.h
@@ -126,7 +126,6 @@ struct compositor_state {
 	struct wl_listener output_remove;
 	struct wl_list outputs;
 
-	bool exit;
 	void *data;
 };
 
diff --git a/example/simple.c b/examples/simple.c
index 45cb2b93..45cb2b93 100644
--- a/example/simple.c
+++ b/examples/simple.c
diff --git a/example/tablet.c b/examples/tablet.c
index d7f7d042..d7f7d042 100644
--- a/example/tablet.c
+++ b/examples/tablet.c
diff --git a/example/touch.c b/examples/touch.c
index aca86739..aca86739 100644
--- a/example/touch.c
+++ b/examples/touch.c
diff --git a/include/render/gles2.h b/include/render/gles2.h
index bd0106b3..7b835209 100644
--- a/include/render/gles2.h
+++ b/include/render/gles2.h
@@ -6,19 +6,38 @@
 #include <GLES2/gl2.h>
 #include <wlr/render.h>
 
+struct pixel_format {
+	uint32_t wl_format;
+	GLint gl_format, gl_type;
+	int depth, bpp;
+	GLuint *shader;
+};
+
 struct wlr_surface_state {
 	struct wlr_surface *wlr_surface;
 	GLuint tex_id;
+	const struct pixel_format *pixel_format;
+};
+
+struct shaders {
+	bool initialized;
+	GLuint rgba, rgbx;
+	GLuint quad;
+	GLuint ellipse;
 };
 
+extern struct shaders shaders;
+
+const struct pixel_format *gl_format_for_wl_format(enum wl_shm_format fmt);
+
 struct wlr_surface *gles2_surface_init();
 
 extern const GLchar quad_vertex_src[];
 extern const GLchar quad_fragment_src[];
 extern const GLchar ellipse_fragment_src[];
 extern const GLchar vertex_src[];
-extern const GLchar fragment_src_RGB[];
-extern const GLchar fragment_src_RGBA[];
+extern const GLchar fragment_src_rgba[];
+extern const GLchar fragment_src_rgbx[];
 
 bool _gles2_flush_errors(const char *file, int line);
 #define gles2_flush_errors(...) \
diff --git a/include/wlr/render.h b/include/wlr/render.h
index 53df01d2..30648a20 100644
--- a/include/wlr/render.h
+++ b/include/wlr/render.h
@@ -39,6 +39,11 @@ void wlr_render_colored_quad(struct wlr_renderer *r,
 void wlr_render_colored_ellipse(struct wlr_renderer *r,
 		const float (*color)[4], const float (*matrix)[16]);
 /**
+ * Returns a list of pixel formats supported by this renderer.
+ */
+const enum wl_shm_format *wlr_renderer_get_formats(
+		struct wlr_renderer *r, size_t *len);
+/**
  * Destroys this wlr_renderer. Surfaces must be destroyed separately.
  */
 void wlr_renderer_destroy(struct wlr_renderer *renderer);
@@ -58,8 +63,9 @@ struct wlr_surface {
  * Attaches a pixel buffer to this surface. The buffer may be discarded after
  * calling this function.
  */
-bool wlr_surface_attach_pixels(struct wlr_surface *surf, uint32_t format,
-		int stride, int width, int height, const unsigned char *pixels);
+bool wlr_surface_attach_pixels(struct wlr_surface *surf,
+		enum wl_shm_format format, int stride, int width, int height,
+		const unsigned char *pixels);
 /**
  * Attaches pixels from a wl_shm_buffer to this surface. The shm buffer may be
  * invalidated after calling this function.
diff --git a/include/wlr/render/interface.h b/include/wlr/render/interface.h
index a9c86f2c..ed804bb4 100644
--- a/include/wlr/render/interface.h
+++ b/include/wlr/render/interface.h
@@ -20,9 +20,11 @@ struct wlr_renderer_impl {
 	bool (*render_with_matrix)(struct wlr_renderer_state *state,
 		struct wlr_surface *surface, const float (*matrix)[16]);
 	void (*render_quad)(struct wlr_renderer_state *state,
-			const float (*color)[4], const float (*matrix)[16]);
+		const float (*color)[4], const float (*matrix)[16]);
 	void (*render_ellipse)(struct wlr_renderer_state *state,
-			const float (*color)[4], const float (*matrix)[16]);
+		const float (*color)[4], const float (*matrix)[16]);
+	const enum wl_shm_format *(*formats)(
+		struct wlr_renderer_state *state, size_t *len);
 	void (*destroy)(struct wlr_renderer_state *state);
 };
 
@@ -30,13 +32,14 @@ struct wlr_renderer *wlr_renderer_init(struct wlr_renderer_state *state,
 		struct wlr_renderer_impl *impl);
 
 struct wlr_surface_impl {
-	bool (*attach_pixels)(struct wlr_surface_state *state, uint32_t format,
-		int stride, int width, int height, const unsigned char *pixels);
+	bool (*attach_pixels)(struct wlr_surface_state *state,
+		enum wl_shm_format format, int stride, int width, int height,
+		const unsigned char *pixels);
 	bool (*attach_shm)(struct wlr_surface_state *state, uint32_t format,
 		struct wl_shm_buffer *shm);
 	// TODO: egl
 	void (*get_matrix)(struct wlr_surface_state *state,
-			float (*matrix)[16], const float (*projection)[16], int x, int y);
+		float (*matrix)[16], const float (*projection)[16], int x, int y);
 	void (*bind)(struct wlr_surface_state *state);
 	void (*destroy)(struct wlr_surface_state *state);
 };
diff --git a/include/wlr/types/wlr_output.h b/include/wlr/types/wlr_output.h
index da5a7b07..cfc4cc0e 100644
--- a/include/wlr/types/wlr_output.h
+++ b/include/wlr/types/wlr_output.h
@@ -19,8 +19,9 @@ struct wlr_output_state;
 struct wlr_output {
 	const struct wlr_output_impl *impl;
 	struct wlr_output_state *state;
+	void *user_data;
 	struct wl_global *wl_global;
-	struct wl_list resource_list;
+	struct wl_list wl_resources;
 
 	uint32_t flags;
 	char name[16];
diff --git a/render/CMakeLists.txt b/render/CMakeLists.txt
index 4058b50e..d412ddbc 100644
--- a/render/CMakeLists.txt
+++ b/render/CMakeLists.txt
@@ -5,5 +5,6 @@ add_library(wlr-render
     gles2/shaders.c
     gles2/renderer.c
     gles2/surface.c
+    gles2/pixel_format.c
     gles2/util.c
 )
diff --git a/render/gles2/pixel_format.c b/render/gles2/pixel_format.c
new file mode 100644
index 00000000..a0b9d09f
--- /dev/null
+++ b/render/gles2/pixel_format.c
@@ -0,0 +1,45 @@
+#include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+#include "render/gles2.h"
+
+// Adapted from weston
+struct pixel_format formats[] = {
+	{
+		.wl_format = WL_SHM_FORMAT_ARGB8888,
+		.depth = 32,
+		.bpp = 32,
+		.gl_format = GL_BGRA_EXT,
+		.gl_type = GL_UNSIGNED_BYTE,
+		.shader = &shaders.rgba
+	},
+	{
+		.wl_format = WL_SHM_FORMAT_XRGB8888,
+		.depth = 24,
+		.bpp = 32,
+		.gl_format = GL_BGRA_EXT,
+		.gl_type = GL_UNSIGNED_BYTE,
+		.shader = &shaders.rgbx
+	},
+	{
+		.wl_format = WL_SHM_FORMAT_XBGR8888,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_UNSIGNED_BYTE,
+		.shader = &shaders.rgbx
+	},
+	{
+		.wl_format = WL_SHM_FORMAT_ABGR8888,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_UNSIGNED_BYTE,
+		.shader = &shaders.rgba
+	},
+};
+// TODO: more pixel formats
+
+const struct pixel_format *gl_format_for_wl_format(enum wl_shm_format fmt) {
+	for (size_t i = 0; i < sizeof(formats) / sizeof(*formats); ++i) {
+		if (formats[i].wl_format == fmt) {
+			return &formats[i];
+		}
+	}
+	return NULL;
+}
diff --git a/render/gles2/renderer.c b/render/gles2/renderer.c
index 623f378e..897dc3b8 100644
--- a/render/gles2/renderer.c
+++ b/render/gles2/renderer.c
@@ -10,12 +10,7 @@
 #include <wlr/util/log.h>
 #include "render/gles2.h"
 
-static struct {
-	bool initialized;
-	GLuint rgb, rgba;
-	GLuint quad;
-	GLuint ellipse;
-} shaders;
+struct shaders shaders;
 
 static bool compile_shader(GLuint type, const GLchar *src, GLuint *shader) {
 	*shader = GL_CALL(glCreateShader(type));
@@ -58,10 +53,10 @@ static void init_default_shaders() {
 	if (shaders.initialized) {
 		return;
 	}
-	if (!compile_program(vertex_src, fragment_src_RGB, &shaders.rgb)) {
+	if (!compile_program(vertex_src, fragment_src_rgba, &shaders.rgba)) {
 		goto error;
 	}
-	if (!compile_program(vertex_src, fragment_src_RGBA, &shaders.rgba)) {
+	if (!compile_program(vertex_src, fragment_src_rgbx, &shaders.rgbx)) {
 		goto error;
 	}
 	if (!compile_program(quad_vertex_src, quad_fragment_src, &shaders.quad)) {
@@ -129,20 +124,10 @@ static void draw_quad() {
 static bool wlr_gles2_render_surface(struct wlr_renderer_state *state,
 		struct wlr_surface *surface, const float (*matrix)[16]) {
 	assert(surface && surface->valid);
-	switch (surface->format) {
-	case GL_RGB:
-		GL_CALL(glUseProgram(shaders.rgb));
-		break;
-	case GL_RGBA:
-		GL_CALL(glUseProgram(shaders.rgba));
-		break;
-	default:
-		wlr_log(L_ERROR, "No shader for this surface format");
-		return false;
-	}
-	gles2_flush_errors();
 	wlr_surface_bind(surface);
 	GL_CALL(glUniformMatrix4fv(0, 1, GL_FALSE, *matrix));
+	// TODO: source alpha from somewhere else I guess
+	GL_CALL(glUniform1f(2, 1.0f));
 	draw_quad();
 	return true;
 }
@@ -163,6 +148,18 @@ static void wlr_gles2_render_ellipse(struct wlr_renderer_state *state,
 	draw_quad();
 }
 
+static const enum wl_shm_format *wlr_gles2_formats(
+		struct wlr_renderer_state *state, size_t *len) {
+	static enum wl_shm_format formats[] = {
+		WL_SHM_FORMAT_ARGB8888,
+		WL_SHM_FORMAT_XRGB8888,
+		WL_SHM_FORMAT_ABGR8888,
+		WL_SHM_FORMAT_XBGR8888,
+	};
+	*len = sizeof(formats) / sizeof(formats[0]);
+	return formats;
+}
+
 static void wlr_gles2_destroy(struct wlr_renderer_state *state) {
 	// no-op
 }
@@ -174,6 +171,7 @@ static struct wlr_renderer_impl wlr_renderer_impl = {
 	.render_with_matrix = wlr_gles2_render_surface,
 	.render_quad = wlr_gles2_render_quad,
 	.render_ellipse = wlr_gles2_render_ellipse,
+	.formats = wlr_gles2_formats,
 	.destroy = wlr_gles2_destroy
 };
 
diff --git a/render/gles2/shaders.c b/render/gles2/shaders.c
index 62712230..f5e61dd6 100644
--- a/render/gles2/shaders.c
+++ b/render/gles2/shaders.c
@@ -20,7 +20,6 @@ const GLchar quad_vertex_src[] =
 "                 vec4(i0.z, i1.z, i2.z, i3.z),"
 "                 vec4(i0.w, i1.w, i2.w, i3.w)"
 "                 );"
-""
 "    return outMatrix;"
 "}"
 "void main() {"
@@ -37,8 +36,7 @@ const GLchar quad_fragment_src[] =
 "  gl_FragColor = v_color;"
 "}";
 
-// Colored ellipses (TODO)
-
+// Colored ellipses
 const GLchar ellipse_fragment_src[] =
 "precision mediump float;"
 "varying vec4 v_color;"
@@ -74,18 +72,21 @@ const GLchar vertex_src[] =
 "	v_texcoord = texcoord;"
 "}";
 
-const GLchar fragment_src_RGB[] =
+const GLchar fragment_src_rgba[] =
 "precision mediump float;"
 "varying vec2 v_texcoord;"
 "uniform sampler2D tex;"
+"uniform float alpha;"
 "void main() {"
-"	gl_FragColor = vec4(texture2D(tex, v_texcoord).rgb, 1.0);"
+"	gl_FragColor = alpha * texture2D(tex, v_texcoord);"
 "}";
 
-const GLchar fragment_src_RGBA[] =
+const GLchar fragment_src_rgbx[] =
 "precision mediump float;"
 "varying vec2 v_texcoord;"
 "uniform sampler2D tex;"
+"uniform float alpha;"
 "void main() {"
-"	gl_FragColor = texture2D(tex, v_texcoord);"
+"   gl_FragColor.rgb = alpha * texture2D(tex, v_texcoord).rgb;"
+"   gl_FragColor.a = alpha;"
 "}";
diff --git a/render/gles2/surface.c b/render/gles2/surface.c
index c9be6ac2..f730a499 100644
--- a/render/gles2/surface.c
+++ b/render/gles2/surface.c
@@ -8,19 +8,27 @@
 #include <wlr/render.h>
 #include <wlr/render/interface.h>
 #include <wlr/render/matrix.h>
+#include <wlr/util/log.h>
 #include "render/gles2.h"
 
 static bool gles2_surface_attach_pixels(struct wlr_surface_state *surface,
-		uint32_t format, int stride, int width, int height, const unsigned char *pixels) {
+		enum wl_shm_format format, int stride, int width, int height,
+		const unsigned char *pixels) {
 	assert(surface);
+	const struct pixel_format *fmt = gl_format_for_wl_format(format);
+	if (!fmt || !fmt->gl_format) {
+		wlr_log(L_ERROR, "No supported pixel format for this surface");
+		return false;
+	}
 	surface->wlr_surface->width = width;
 	surface->wlr_surface->height = height;
 	surface->wlr_surface->format = format;
+	surface->pixel_format = fmt;
 	GL_CALL(glGenTextures(1, &surface->tex_id));
 	GL_CALL(glBindTexture(GL_TEXTURE_2D, surface->tex_id));
 	GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, stride));
-	GL_CALL(glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0,
-			format, GL_UNSIGNED_BYTE, pixels));
+	GL_CALL(glTexImage2D(GL_TEXTURE_2D, 0, fmt->gl_format, width, height, 0,
+			fmt->gl_format, fmt->gl_type, pixels));
 	GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, 0));
 	surface->wlr_surface->valid = true;
 	return true;
@@ -43,6 +51,7 @@ static void gles2_surface_bind(struct wlr_surface_state *surface) {
 	GL_CALL(glBindTexture(GL_TEXTURE_2D, surface->tex_id));
 	GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
 	GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
+	GL_CALL(glUseProgram(*surface->pixel_format->shader));
 }
 
 static void gles2_surface_destroy(struct wlr_surface_state *surface) {
diff --git a/render/wlr_renderer.c b/render/wlr_renderer.c
index f48bb3eb..720c5254 100644
--- a/render/wlr_renderer.c
+++ b/render/wlr_renderer.c
@@ -41,3 +41,8 @@ void wlr_render_colored_ellipse(struct wlr_renderer *r,
 		const float (*color)[4], const float (*matrix)[16]) {
 	r->impl->render_ellipse(r->state, color, matrix);
 }
+
+const enum wl_shm_format *wlr_renderer_get_formats(
+		struct wlr_renderer *r, size_t *len) {
+	return r->impl->formats(r->state, len);
+}
diff --git a/types/wlr_output.c b/types/wlr_output.c
index b64fd827..bec7cd5f 100644
--- a/types/wlr_output.c
+++ b/types/wlr_output.c
@@ -45,7 +45,7 @@ static void wl_output_send_to_resource(struct wl_resource *resource) {
 static void wl_output_destroy(struct wl_resource *resource) {
 	struct wlr_output *output = wl_resource_get_user_data(resource);
 	struct wl_resource *_resource = NULL;
-	wl_resource_for_each(_resource, &output->resource_list) {
+	wl_resource_for_each(_resource, &output->wl_resources) {
 		if (_resource == resource) {
 			struct wl_list *link = wl_resource_get_link(_resource);
 			wl_list_remove(link);
@@ -75,7 +75,7 @@ static void wl_output_bind(struct wl_client *wl_client, void *_wlr_output,
 			wl_client, &wl_output_interface, version, id);
 	wl_resource_set_implementation(wl_resource, &wl_output_impl,
 			wlr_output, wl_output_destroy);
-	wl_list_insert(&wlr_output->resource_list, wl_resource_get_link(wl_resource));
+	wl_list_insert(&wlr_output->wl_resources, wl_resource_get_link(wl_resource));
 	wl_output_send_to_resource(wl_resource);
 }
 
@@ -84,7 +84,7 @@ struct wl_global *wlr_output_create_global(
 	struct wl_global *wl_global = wl_global_create(display,
 		&wl_output_interface, 3, wlr_output, wl_output_bind);
 	wlr_output->wl_global = wl_global;
-	wl_list_init(&wlr_output->resource_list);
+	wl_list_init(&wlr_output->wl_resources);
 	return wl_global;
 }