renamed gles2 components to gles

render/gles/meson.build

@@ -0,0 +1,19 @@
+glesv2 = dependency('glesv2', required: 'gles2' in renderers)
+
+if not ((glesv2.found() or glesv3.found()) and internal_features['egl'])
+	subdir_done()
+endif
+
+glslang = find_program('glslang', 'glslangValidator', native: true, required: false, disabler: true)
+
+features += { 'gles2-renderer': true }
+wlr_deps += glesv2
+
+wlr_files += files(
+	'pass.c',
+	'pixel_format.c',
+	'renderer.c',
+	'texture.c',
+)
+
+subdir('shaders')

render/gles/pass.c

@@ -0,0 +1,344 @@
+#include <stdlib.h>
+#include <assert.h>
+#include <pixman.h>
+#include <time.h>
+#include <unistd.h>
+#include <wlr/render/drm_syncobj.h>
+#include <wlr/util/transform.h>
+#include "render/egl.h"
+#include "render/gles.h"
+#include "util/matrix.h"
+
+#define MAX_QUADS 86 // 4kb
+
+static const struct wlr_render_pass_impl render_pass_impl;
+
+static struct wlr_gles_render_pass *get_render_pass(struct wlr_render_pass *wlr_pass) {
+	assert(wlr_pass->impl == &render_pass_impl);
+	struct wlr_gles_render_pass *pass = wl_container_of(wlr_pass, pass, base);
+	return pass;
+}
+
+static bool render_pass_submit(struct wlr_render_pass *wlr_pass) {
+	struct wlr_gles_render_pass *pass = get_render_pass(wlr_pass);
+	struct wlr_gles_renderer *renderer = pass->buffer->renderer;
+	struct wlr_gles_render_timer *timer = pass->timer;
+	bool ok = false;
+
+	push_gles_debug(renderer);
+
+	if (timer) {
+		// clear disjoint flag
+		GLint64 disjoint;
+		renderer->procs.glGetInteger64vEXT(GL_GPU_DISJOINT_EXT, &disjoint);
+		// set up the query
+		renderer->procs.glQueryCounterEXT(timer->id, GL_TIMESTAMP_EXT);
+		// get end-of-CPU-work time in GL time domain
+		renderer->procs.glGetInteger64vEXT(GL_TIMESTAMP_EXT, &timer->gl_cpu_end);
+		// get end-of-CPU-work time in CPU time domain
+		clock_gettime(CLOCK_MONOTONIC, &timer->cpu_end);
+	}
+
+	if (pass->signal_timeline != NULL) {
+		EGLSyncKHR sync = wlr_egl_create_sync(renderer->egl, -1);
+		if (sync == EGL_NO_SYNC_KHR) {
+			goto out;
+		}
+
+		int sync_file_fd = wlr_egl_dup_fence_fd(renderer->egl, sync);
+		wlr_egl_destroy_sync(renderer->egl, sync);
+		if (sync_file_fd < 0) {
+			goto out;
+		}
+
+		ok = wlr_drm_syncobj_timeline_import_sync_file(pass->signal_timeline, pass->signal_point, sync_file_fd);
+		close(sync_file_fd);
+		if (!ok) {
+			goto out;
+		}
+	} else {
+		glFlush();
+	}
+
+	ok = true;
+
+out:
+	glBindFramebuffer(GL_FRAMEBUFFER, 0);
+
+	pop_gles_debug(renderer);
+	wlr_egl_restore_context(&pass->prev_ctx);
+
+	wlr_drm_syncobj_timeline_unref(pass->signal_timeline);
+	wlr_buffer_unlock(pass->buffer->buffer);
+	free(pass);
+
+	return ok;
+}
+
+static void render(const struct wlr_box *box, const pixman_region32_t *clip, GLint attrib) {
+	pixman_region32_t region;
+	pixman_region32_init_rect(&region, box->x, box->y, box->width, box->height);
+
+	if (clip) {
+		pixman_region32_intersect(&region, &region, clip);
+	}
+
+	int rects_len;
+	const pixman_box32_t *rects = pixman_region32_rectangles(&region, &rects_len);
+	if (rects_len == 0) {
+		pixman_region32_fini(&region);
+		return;
+	}
+
+	glEnableVertexAttribArray(attrib);
+
+	for (int i = 0; i < rects_len;) {
+		int batch = rects_len - i < MAX_QUADS ? rects_len - i : MAX_QUADS;
+		int batch_end = batch + i;
+
+		size_t vert_index = 0;
+		GLfloat verts[MAX_QUADS * 6 * 2];
+		for (; i < batch_end; i++) {
+			const pixman_box32_t *rect = &rects[i];
+
+			verts[vert_index++] = (GLfloat)(rect->x1 - box->x) / box->width;
+			verts[vert_index++] = (GLfloat)(rect->y1 - box->y) / box->height;
+			verts[vert_index++] = (GLfloat)(rect->x2 - box->x) / box->width;
+			verts[vert_index++] = (GLfloat)(rect->y1 - box->y) / box->height;
+			verts[vert_index++] = (GLfloat)(rect->x1 - box->x) / box->width;
+			verts[vert_index++] = (GLfloat)(rect->y2 - box->y) / box->height;
+			verts[vert_index++] = (GLfloat)(rect->x2 - box->x) / box->width;
+			verts[vert_index++] = (GLfloat)(rect->y1 - box->y) / box->height;
+			verts[vert_index++] = (GLfloat)(rect->x2 - box->x) / box->width;
+			verts[vert_index++] = (GLfloat)(rect->y2 - box->y) / box->height;
+			verts[vert_index++] = (GLfloat)(rect->x1 - box->x) / box->width;
+			verts[vert_index++] = (GLfloat)(rect->y2 - box->y) / box->height;
+		}
+
+		glVertexAttribPointer(attrib, 2, GL_FLOAT, GL_FALSE, 0, verts);
+		glDrawArrays(GL_TRIANGLES, 0, batch * 6);
+	}
+
+	glDisableVertexAttribArray(attrib);
+
+	pixman_region32_fini(&region);
+}
+
+static void set_proj_matrix(GLint loc, float proj[9], const struct wlr_box *box) {
+	float gl_matrix[9];
+	wlr_matrix_identity(gl_matrix);
+	wlr_matrix_translate(gl_matrix, box->x, box->y);
+	wlr_matrix_scale(gl_matrix, box->width, box->height);
+	wlr_matrix_multiply(gl_matrix, proj, gl_matrix);
+	glUniformMatrix3fv(loc, 1, GL_FALSE, gl_matrix);
+}
+
+static void set_tex_matrix(GLint loc, enum wl_output_transform trans,
+		const struct wlr_fbox *box) {
+	float tex_matrix[9];
+	wlr_matrix_identity(tex_matrix);
+	wlr_matrix_translate(tex_matrix, box->x, box->y);
+	wlr_matrix_scale(tex_matrix, box->width, box->height);
+	wlr_matrix_translate(tex_matrix, .5, .5);
+
+	// since textures have a different origin point we have to transform
+	// differently if we are rotating
+	if (trans & WL_OUTPUT_TRANSFORM_90) {
+		wlr_matrix_transform(tex_matrix, wlr_output_transform_invert(trans));
+	} else {
+		wlr_matrix_transform(tex_matrix, trans);
+	}
+	wlr_matrix_translate(tex_matrix, -.5, -.5);
+
+	glUniformMatrix3fv(loc, 1, GL_FALSE, tex_matrix);
+}
+
+static void setup_blending(enum wlr_render_blend_mode mode) {
+	switch (mode) {
+	case WLR_RENDER_BLEND_MODE_PREMULTIPLIED:
+		glEnable(GL_BLEND);
+		break;
+	case WLR_RENDER_BLEND_MODE_NONE:
+		glDisable(GL_BLEND);
+		break;
+	}
+}
+
+static void render_pass_add_texture(struct wlr_render_pass *wlr_pass,
+		const struct wlr_render_texture_options *options) {
+	struct wlr_gles_render_pass *pass = get_render_pass(wlr_pass);
+	struct wlr_gles_renderer *renderer = pass->buffer->renderer;
+	struct wlr_gles_texture *texture = gles_get_texture(options->texture);
+
+	struct wlr_gles_tex_shader *shader = NULL;
+
+	switch (texture->target) {
+	case GL_TEXTURE_2D:
+		if (texture->has_alpha) {
+			shader = &renderer->shaders.tex_rgba;
+		} else {
+			shader = &renderer->shaders.tex_rgbx;
+		}
+		break;
+	case GL_TEXTURE_EXTERNAL_OES:
+		// EGL_EXT_image_dma_buf_import_modifiers requires
+		// GL_OES_EGL_image_external
+		assert(renderer->exts.OES_egl_image_external);
+		shader = &renderer->shaders.tex_ext;
+		break;
+	default:
+		abort();
+	}
+
+	struct wlr_box dst_box;
+	struct wlr_fbox src_fbox;
+	wlr_render_texture_options_get_src_box(options, &src_fbox);
+	wlr_render_texture_options_get_dst_box(options, &dst_box);
+	float alpha = wlr_render_texture_options_get_alpha(options);
+
+	src_fbox.x /= options->texture->width;
+	src_fbox.y /= options->texture->height;
+	src_fbox.width /= options->texture->width;
+	src_fbox.height /= options->texture->height;
+
+	push_gles_debug(renderer);
+
+	if (options->wait_timeline != NULL) {
+		int sync_file_fd =
+			wlr_drm_syncobj_timeline_export_sync_file(options->wait_timeline, options->wait_point);
+		if (sync_file_fd < 0) {
+			return;
+		}
+
+		EGLSyncKHR sync = wlr_egl_create_sync(renderer->egl, sync_file_fd);
+		close(sync_file_fd);
+		if (sync == EGL_NO_SYNC_KHR) {
+			return;
+		}
+
+		bool ok = wlr_egl_wait_sync(renderer->egl, sync);
+		wlr_egl_destroy_sync(renderer->egl, sync);
+		if (!ok) {
+			return;
+		}
+	}
+
+	setup_blending(!texture->has_alpha && alpha == 1.0 ?
+		WLR_RENDER_BLEND_MODE_NONE : options->blend_mode);
+
+	glUseProgram(shader->program);
+
+	glActiveTexture(GL_TEXTURE0);
+	glBindTexture(texture->target, texture->tex);
+
+	switch (options->filter_mode) {
+	case WLR_SCALE_FILTER_BILINEAR:
+		glTexParameteri(texture->target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+		glTexParameteri(texture->target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+		break;
+	case WLR_SCALE_FILTER_NEAREST:
+		glTexParameteri(texture->target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+		glTexParameteri(texture->target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+		break;
+	}
+
+	glUniform1i(shader->tex, 0);
+	glUniform1f(shader->alpha, alpha);
+	set_proj_matrix(shader->proj, pass->projection_matrix, &dst_box);
+	set_tex_matrix(shader->tex_proj, options->transform, &src_fbox);
+
+	render(&dst_box, options->clip, shader->pos_attrib);
+
+	glBindTexture(texture->target, 0);
+	pop_gles_debug(renderer);
+}
+
+static void render_pass_add_rect(struct wlr_render_pass *wlr_pass,
+		const struct wlr_render_rect_options *options) {
+	struct wlr_gles_render_pass *pass = get_render_pass(wlr_pass);
+	struct wlr_gles_renderer *renderer = pass->buffer->renderer;
+
+	const struct wlr_render_color *color = &options->color;
+	struct wlr_box box;
+	wlr_render_rect_options_get_box(options, pass->buffer->buffer, &box);
+
+	push_gles_debug(renderer);
+	setup_blending(color->a == 1.0 ? WLR_RENDER_BLEND_MODE_NONE : options->blend_mode);
+
+	glUseProgram(renderer->shaders.quad.program);
+
+	set_proj_matrix(renderer->shaders.quad.proj, pass->projection_matrix, &box);
+	glUniform4f(renderer->shaders.quad.color, color->r, color->g, color->b, color->a);
+
+	render(&box, options->clip, renderer->shaders.quad.pos_attrib);
+
+	pop_gles_debug(renderer);
+}
+
+static const struct wlr_render_pass_impl render_pass_impl = {
+	.submit = render_pass_submit,
+	.add_texture = render_pass_add_texture,
+	.add_rect = render_pass_add_rect,
+};
+
+static const char *reset_status_str(GLenum status) {
+	switch (status) {
+	case GL_GUILTY_CONTEXT_RESET_KHR:
+		return "guilty";
+	case GL_INNOCENT_CONTEXT_RESET_KHR:
+		return "innocent";
+	case GL_UNKNOWN_CONTEXT_RESET_KHR:
+		return "unknown";
+	default:
+		return "<invalid>";
+	}
+}
+
+struct wlr_gles_render_pass *begin_gles_buffer_pass(struct wlr_gles_buffer *buffer,
+		struct wlr_egl_context *prev_ctx, struct wlr_gles_render_timer *timer,
+		struct wlr_drm_syncobj_timeline *signal_timeline, uint64_t signal_point) {
+	struct wlr_gles_renderer *renderer = buffer->renderer;
+	struct wlr_buffer *wlr_buffer = buffer->buffer;
+
+	if (renderer->procs.glGetGraphicsResetStatusKHR) {
+		GLenum status = renderer->procs.glGetGraphicsResetStatusKHR();
+		if (status != GL_NO_ERROR) {
+			wlr_log(WLR_ERROR, "GPU reset (%s)", reset_status_str(status));
+			wl_signal_emit_mutable(&renderer->wlr_renderer.events.lost, NULL);
+			return NULL;
+		}
+	}
+
+	GLint fbo = gles_buffer_get_fbo(buffer);
+	if (!fbo) {
+		return NULL;
+	}
+
+	struct wlr_gles_render_pass *pass = calloc(1, sizeof(*pass));
+	if (pass == NULL) {
+		return NULL;
+	}
+
+	wlr_render_pass_init(&pass->base, &render_pass_impl);
+	wlr_buffer_lock(wlr_buffer);
+	pass->buffer = buffer;
+	pass->timer = timer;
+	pass->prev_ctx = *prev_ctx;
+	if (signal_timeline != NULL) {
+		pass->signal_timeline = wlr_drm_syncobj_timeline_ref(signal_timeline);
+		pass->signal_point = signal_point;
+	}
+
+	matrix_projection(pass->projection_matrix, wlr_buffer->width, wlr_buffer->height,
+		WL_OUTPUT_TRANSFORM_FLIPPED_180);
+
+	push_gles_debug(renderer);
+	glBindFramebuffer(GL_FRAMEBUFFER, fbo);
+
+	glViewport(0, 0, wlr_buffer->width, wlr_buffer->height);
+	glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
+	glDisable(GL_SCISSOR_TEST);
+	pop_gles_debug(renderer);
+
+	return pass;
+}

render/gles/pixel_format.c

@@ -0,0 +1,162 @@
+#include <drm_fourcc.h>
+#include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+#include "render/gles.h"
+#include "render/pixel_format.h"
+
+/*
+ * The DRM formats are little endian while the GL formats are big endian,
+ * so DRM_FORMAT_ARGB8888 is actually compatible with GL_BGRA_EXT.
+ */
+static const struct wlr_gles_pixel_format formats[] = {
+	{
+		.drm_format = DRM_FORMAT_ARGB8888,
+		.gl_format = GL_BGRA_EXT,
+		.gl_type = GL_UNSIGNED_BYTE,
+	},
+	{
+		.drm_format = DRM_FORMAT_XRGB8888,
+		.gl_format = GL_BGRA_EXT,
+		.gl_type = GL_UNSIGNED_BYTE,
+	},
+	{
+		.drm_format = DRM_FORMAT_XBGR8888,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_UNSIGNED_BYTE,
+	},
+	{
+		.drm_format = DRM_FORMAT_ABGR8888,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_UNSIGNED_BYTE,
+	},
+	{
+		.drm_format = DRM_FORMAT_BGR888,
+		.gl_format = GL_RGB,
+		.gl_type = GL_UNSIGNED_BYTE,
+	},
+#if WLR_LITTLE_ENDIAN
+	{
+		.drm_format = DRM_FORMAT_RGBX4444,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_UNSIGNED_SHORT_4_4_4_4,
+	},
+	{
+		.drm_format = DRM_FORMAT_RGBA4444,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_UNSIGNED_SHORT_4_4_4_4,
+	},
+	{
+		.drm_format = DRM_FORMAT_RGBX5551,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_UNSIGNED_SHORT_5_5_5_1,
+	},
+	{
+		.drm_format = DRM_FORMAT_RGBA5551,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_UNSIGNED_SHORT_5_5_5_1,
+	},
+	{
+		.drm_format = DRM_FORMAT_RGB565,
+		.gl_format = GL_RGB,
+		.gl_type = GL_UNSIGNED_SHORT_5_6_5,
+	},
+	{
+		.drm_format = DRM_FORMAT_XBGR2101010,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_UNSIGNED_INT_2_10_10_10_REV_EXT,
+	},
+	{
+		.drm_format = DRM_FORMAT_ABGR2101010,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_UNSIGNED_INT_2_10_10_10_REV_EXT,
+	},
+	{
+		.drm_format = DRM_FORMAT_XBGR16161616F,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_HALF_FLOAT_OES,
+	},
+	{
+		.drm_format = DRM_FORMAT_ABGR16161616F,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_HALF_FLOAT_OES,
+	},
+	{
+		.drm_format = DRM_FORMAT_XBGR16161616,
+		.gl_internalformat = GL_RGBA16_EXT,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_UNSIGNED_SHORT,
+	},
+	{
+		.drm_format = DRM_FORMAT_ABGR16161616,
+		.gl_internalformat = GL_RGBA16_EXT,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_UNSIGNED_SHORT,
+	},
+#endif
+};
+
+// TODO: more pixel formats
+
+/*
+ * Return true if supported for texturing, even if other operations like
+ * reading aren't supported.
+ */
+bool is_gles_pixel_format_supported(const struct wlr_gles_renderer *renderer,
+		const struct wlr_gles_pixel_format *format) {
+	if (format->gl_type == GL_UNSIGNED_INT_2_10_10_10_REV_EXT
+			&& !renderer->exts.EXT_texture_type_2_10_10_10_REV) {
+		return false;
+	}
+	if (format->gl_type == GL_HALF_FLOAT_OES
+			&& !renderer->exts.OES_texture_half_float_linear) {
+		return false;
+	}
+	if (format->gl_type == GL_UNSIGNED_SHORT
+			&& !renderer->exts.EXT_texture_norm16) {
+		return false;
+	}
+	/*
+	 * Note that we don't need to check for GL_EXT_texture_format_BGRA8888
+	 * here, since we've already checked if we have it at renderer creation
+	 * time and bailed out if not. We do the check there because Wayland
+	 * requires all compositors to support SHM buffers in that format.
+	 */
+	return true;
+}
+
+const struct wlr_gles_pixel_format *get_gles_format_from_drm(uint32_t fmt) {
+	for (size_t i = 0; i < sizeof(formats) / sizeof(*formats); ++i) {
+		if (formats[i].drm_format == fmt) {
+			return &formats[i];
+		}
+	}
+	return NULL;
+}
+
+const struct wlr_gles_pixel_format *get_gles_format_from_gl(
+		GLint gl_format, GLint gl_type, bool alpha) {
+	for (size_t i = 0; i < sizeof(formats) / sizeof(*formats); ++i) {
+		if (formats[i].gl_format != gl_format ||
+				formats[i].gl_type != gl_type) {
+			continue;
+		}
+
+		if (pixel_format_has_alpha(formats[i].drm_format) != alpha) {
+			continue;
+		}
+
+		return &formats[i];
+	}
+	return NULL;
+}
+
+void get_gles_shm_formats(const struct wlr_gles_renderer *renderer,
+		struct wlr_drm_format_set *out) {
+	for (size_t i = 0; i < sizeof(formats) / sizeof(formats[0]); i++) {
+		if (!is_gles_pixel_format_supported(renderer, &formats[i])) {
+			continue;
+		}
+		wlr_drm_format_set_add(out, formats[i].drm_format, DRM_FORMAT_MOD_INVALID);
+		wlr_drm_format_set_add(out, formats[i].drm_format, DRM_FORMAT_MOD_LINEAR);
+	}
+}

render/gles/renderer.c

@@ -0,0 +1,719 @@
+#include <assert.h>
+#include <drm_fourcc.h>
+#include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+#include <wayland-server-protocol.h>
+#include <wayland-util.h>
+#include <wlr/render/egl.h>
+#include <wlr/render/interface.h>
+#include <wlr/render/wlr_renderer.h>
+#include <wlr/util/box.h>
+#include <wlr/util/log.h>
+#include <xf86drm.h>
+#include "render/egl.h"
+#include "render/gles.h"
+#include "render/pixel_format.h"
+#include "util/time.h"
+
+#include "gles2_common_vert_src.h"
+#include "gles2_quad_frag_src.h"
+#include "gles2_tex_rgba_frag_src.h"
+#include "gles2_tex_rgbx_frag_src.h"
+#include "gles2_tex_external_frag_src.h"
+
+static const struct wlr_renderer_impl renderer_impl;
+static const struct wlr_render_timer_impl render_timer_impl;
+
+bool wlr_renderer_is_gles(struct wlr_renderer *wlr_renderer) {
+	return wlr_renderer->impl == &renderer_impl;
+}
+
+struct wlr_gles_renderer *gles_get_renderer(
+		struct wlr_renderer *wlr_renderer) {
+	assert(wlr_renderer_is_gles(wlr_renderer));
+	struct wlr_gles_renderer *renderer = wl_container_of(wlr_renderer, renderer, wlr_renderer);
+	return renderer;
+}
+
+bool wlr_render_timer_is_gles(struct wlr_render_timer *timer) {
+	return timer->impl == &render_timer_impl;
+}
+
+struct wlr_gles_render_timer *gles_get_render_timer(struct wlr_render_timer *wlr_timer) {
+	assert(wlr_render_timer_is_gles(wlr_timer));
+	struct wlr_gles_render_timer *timer = wl_container_of(wlr_timer, timer, base);
+	return timer;
+}
+
+static void destroy_buffer(struct wlr_gles_buffer *buffer) {
+	wl_list_remove(&buffer->link);
+	wlr_addon_finish(&buffer->addon);
+
+	struct wlr_egl_context prev_ctx;
+	wlr_egl_make_current(buffer->renderer->egl, &prev_ctx);
+
+	push_gles_debug(buffer->renderer);
+
+	glDeleteFramebuffers(1, &buffer->fbo);
+	glDeleteRenderbuffers(1, &buffer->rbo);
+	glDeleteTextures(1, &buffer->tex);
+
+	pop_gles_debug(buffer->renderer);
+
+	wlr_egl_destroy_image(buffer->renderer->egl, buffer->image);
+
+	wlr_egl_restore_context(&prev_ctx);
+
+	free(buffer);
+}
+
+static void handle_buffer_destroy(struct wlr_addon *addon) {
+	struct wlr_gles_buffer *buffer =
+		wl_container_of(addon, buffer, addon);
+	destroy_buffer(buffer);
+}
+
+static const struct wlr_addon_interface buffer_addon_impl = {
+	.name = "wlr_gles_buffer",
+	.destroy = handle_buffer_destroy,
+};
+
+GLuint gles_buffer_get_fbo(struct wlr_gles_buffer *buffer) {
+	if (buffer->external_only) {
+		wlr_log(WLR_ERROR, "DMA-BUF format is external-only");
+		return 0;
+	}
+
+	if (buffer->fbo) {
+		return buffer->fbo;
+	}
+
+	push_gles_debug(buffer->renderer);
+
+	if (!buffer->rbo) {
+		glGenRenderbuffers(1, &buffer->rbo);
+		glBindRenderbuffer(GL_RENDERBUFFER, buffer->rbo);
+		buffer->renderer->procs.glEGLImageTargetRenderbufferStorageOES(GL_RENDERBUFFER,
+			buffer->image);
+		glBindRenderbuffer(GL_RENDERBUFFER, 0);
+	}
+
+	glGenFramebuffers(1, &buffer->fbo);
+	glBindFramebuffer(GL_FRAMEBUFFER, buffer->fbo);
+	glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+		GL_RENDERBUFFER, buffer->rbo);
+	GLenum fb_status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
+	glBindFramebuffer(GL_FRAMEBUFFER, 0);
+
+	if (fb_status != GL_FRAMEBUFFER_COMPLETE) {
+		wlr_log(WLR_ERROR, "Failed to create FBO");
+		glDeleteFramebuffers(1, &buffer->fbo);
+		buffer->fbo = 0;
+	}
+
+	pop_gles_debug(buffer->renderer);
+
+	return buffer->fbo;
+}
+
+struct wlr_gles_buffer *gles_buffer_get_or_create(struct wlr_gles_renderer *renderer,
+		struct wlr_buffer *wlr_buffer) {
+	struct wlr_addon *addon =
+		wlr_addon_find(&wlr_buffer->addons, renderer, &buffer_addon_impl);
+	if (addon) {
+		struct wlr_gles_buffer *buffer = wl_container_of(addon, buffer, addon);
+		return buffer;
+	}
+
+	struct wlr_gles_buffer *buffer = calloc(1, sizeof(*buffer));
+	if (buffer == NULL) {
+		wlr_log_errno(WLR_ERROR, "Allocation failed");
+		return NULL;
+	}
+	buffer->buffer = wlr_buffer;
+	buffer->renderer = renderer;
+
+	struct wlr_dmabuf_attributes dmabuf = {0};
+	if (!wlr_buffer_get_dmabuf(wlr_buffer, &dmabuf)) {
+		goto error_buffer;
+	}
+
+	buffer->image = wlr_egl_create_image_from_dmabuf(renderer->egl,
+		&dmabuf, &buffer->external_only);
+	if (buffer->image == EGL_NO_IMAGE_KHR) {
+		goto error_buffer;
+	}
+
+	wlr_addon_init(&buffer->addon, &wlr_buffer->addons, renderer,
+		&buffer_addon_impl);
+
+	wl_list_insert(&renderer->buffers, &buffer->link);
+
+	wlr_log(WLR_DEBUG, "Created GL FBO for buffer %dx%d",
+		wlr_buffer->width, wlr_buffer->height);
+
+	return buffer;
+
+error_buffer:
+	free(buffer);
+	return NULL;
+}
+
+static const struct wlr_drm_format_set *gles_get_texture_formats(
+		struct wlr_renderer *wlr_renderer, uint32_t buffer_caps) {
+	struct wlr_gles_renderer *renderer = gles_get_renderer(wlr_renderer);
+	if (buffer_caps & WLR_BUFFER_CAP_DMABUF) {
+		return wlr_egl_get_dmabuf_texture_formats(renderer->egl);
+	} else if (buffer_caps & WLR_BUFFER_CAP_DATA_PTR) {
+		return &renderer->shm_texture_formats;
+	} else {
+		return NULL;
+	}
+}
+
+static const struct wlr_drm_format_set *gles_get_render_formats(
+		struct wlr_renderer *wlr_renderer) {
+	struct wlr_gles_renderer *renderer = gles_get_renderer(wlr_renderer);
+	return wlr_egl_get_dmabuf_render_formats(renderer->egl);
+}
+
+static int gles_get_drm_fd(struct wlr_renderer *wlr_renderer) {
+	struct wlr_gles_renderer *renderer =
+		gles_get_renderer(wlr_renderer);
+
+	if (renderer->drm_fd < 0) {
+		renderer->drm_fd = wlr_egl_dup_drm_fd(renderer->egl);
+	}
+
+	return renderer->drm_fd;
+}
+
+struct wlr_egl *wlr_gles_renderer_get_egl(struct wlr_renderer *wlr_renderer) {
+	struct wlr_gles_renderer *renderer =
+		gles_get_renderer(wlr_renderer);
+	return renderer->egl;
+}
+
+static void gles_destroy(struct wlr_renderer *wlr_renderer) {
+	struct wlr_gles_renderer *renderer = gles_get_renderer(wlr_renderer);
+
+	wlr_egl_make_current(renderer->egl, NULL);
+
+	struct wlr_gles_texture *tex, *tex_tmp;
+	wl_list_for_each_safe(tex, tex_tmp, &renderer->textures, link) {
+		gles_texture_destroy(tex);
+	}
+
+	struct wlr_gles_buffer *buffer, *buffer_tmp;
+	wl_list_for_each_safe(buffer, buffer_tmp, &renderer->buffers, link) {
+		destroy_buffer(buffer);
+	}
+
+	push_gles_debug(renderer);
+	glDeleteProgram(renderer->shaders.quad.program);
+	glDeleteProgram(renderer->shaders.tex_rgba.program);
+	glDeleteProgram(renderer->shaders.tex_rgbx.program);
+	glDeleteProgram(renderer->shaders.tex_ext.program);
+	pop_gles_debug(renderer);
+
+	if (renderer->exts.KHR_debug) {
+		glDisable(GL_DEBUG_OUTPUT_KHR);
+		renderer->procs.glDebugMessageCallbackKHR(NULL, NULL);
+	}
+
+	wlr_egl_unset_current(renderer->egl);
+	wlr_egl_destroy(renderer->egl);
+
+	wlr_drm_format_set_finish(&renderer->shm_texture_formats);
+
+	if (renderer->drm_fd >= 0) {
+		close(renderer->drm_fd);
+	}
+
+	free(renderer);
+}
+
+static struct wlr_render_pass *gles_begin_buffer_pass(struct wlr_renderer *wlr_renderer,
+		struct wlr_buffer *wlr_buffer, const struct wlr_buffer_pass_options *options) {
+	struct wlr_gles_renderer *renderer = gles_get_renderer(wlr_renderer);
+
+	struct wlr_egl_context prev_ctx = {0};
+	if (!wlr_egl_make_current(renderer->egl, &prev_ctx)) {
+		return NULL;
+	}
+
+	struct wlr_gles_render_timer *timer = NULL;
+	if (options->timer) {
+		timer = gles_get_render_timer(options->timer);
+		clock_gettime(CLOCK_MONOTONIC, &timer->cpu_start);
+	}
+
+	struct wlr_gles_buffer *buffer = gles_buffer_get_or_create(renderer, wlr_buffer);
+	if (!buffer) {
+		return NULL;
+	}
+
+	struct wlr_gles_render_pass *pass = begin_gles_buffer_pass(buffer,
+		&prev_ctx, timer, options->signal_timeline, options->signal_point);
+	if (!pass) {
+		return NULL;
+	}
+	return &pass->base;
+}
+
+GLuint wlr_gles_renderer_get_buffer_fbo(struct wlr_renderer *wlr_renderer,
+		struct wlr_buffer *wlr_buffer) {
+	struct wlr_gles_renderer *renderer = gles_get_renderer(wlr_renderer);
+	GLuint fbo = 0;
+
+	struct wlr_egl_context prev_ctx = {0};
+	if (!wlr_egl_make_current(renderer->egl, &prev_ctx)) {
+		return 0;
+	}
+
+	struct wlr_gles_buffer *buffer = gles_buffer_get_or_create(renderer, wlr_buffer);
+	if (buffer) {
+		fbo = gles_buffer_get_fbo(buffer);
+	}
+
+	wlr_egl_restore_context(&prev_ctx);
+	return fbo;
+}
+
+static struct wlr_render_timer *gles_render_timer_create(struct wlr_renderer *wlr_renderer) {
+	struct wlr_gles_renderer *renderer = gles_get_renderer(wlr_renderer);
+	if (!renderer->exts.EXT_disjoint_timer_query) {
+		wlr_log(WLR_ERROR, "can't create timer, EXT_disjoint_timer_query not available");
+		return NULL;
+	}
+
+	struct wlr_gles_render_timer *timer = calloc(1, sizeof(*timer));
+	if (!timer) {
+		return NULL;
+	}
+	timer->base.impl = &render_timer_impl;
+	timer->renderer = renderer;
+
+	struct wlr_egl_context prev_ctx;
+	wlr_egl_make_current(renderer->egl, &prev_ctx);
+	renderer->procs.glGenQueriesEXT(1, &timer->id);
+	wlr_egl_restore_context(&prev_ctx);
+
+	return &timer->base;
+}
+
+static int gles_get_render_time(struct wlr_render_timer *wlr_timer) {
+	struct wlr_gles_render_timer *timer = gles_get_render_timer(wlr_timer);
+	struct wlr_gles_renderer *renderer = timer->renderer;
+
+	struct wlr_egl_context prev_ctx;
+	wlr_egl_make_current(renderer->egl, &prev_ctx);
+
+	GLint64 disjoint;
+	renderer->procs.glGetInteger64vEXT(GL_GPU_DISJOINT_EXT, &disjoint);
+	if (disjoint) {
+		wlr_log(WLR_ERROR, "a disjoint operation occurred and the render timer is invalid");
+		wlr_egl_restore_context(&prev_ctx);
+		return -1;
+	}
+
+	GLint available;
+	renderer->procs.glGetQueryObjectivEXT(timer->id,
+		GL_QUERY_RESULT_AVAILABLE_EXT, &available);
+	if (!available) {
+		wlr_log(WLR_ERROR, "timer was read too early, gpu isn't done!");
+		wlr_egl_restore_context(&prev_ctx);
+		return -1;
+	}
+
+	GLuint64 gl_render_end;
+	renderer->procs.glGetQueryObjectui64vEXT(timer->id, GL_QUERY_RESULT_EXT,
+		&gl_render_end);
+
+	int64_t cpu_nsec_total = timespec_to_nsec(&timer->cpu_end) - timespec_to_nsec(&timer->cpu_start);
+
+	wlr_egl_restore_context(&prev_ctx);
+	return gl_render_end - timer->gl_cpu_end + cpu_nsec_total;
+}
+
+static void gles_render_timer_destroy(struct wlr_render_timer *wlr_timer) {
+	struct wlr_gles_render_timer *timer = wl_container_of(wlr_timer, timer, base);
+	struct wlr_gles_renderer *renderer = timer->renderer;
+
+	struct wlr_egl_context prev_ctx;
+	wlr_egl_make_current(renderer->egl, &prev_ctx);
+	renderer->procs.glDeleteQueriesEXT(1, &timer->id);
+	wlr_egl_restore_context(&prev_ctx);
+	free(timer);
+}
+
+static const struct wlr_renderer_impl renderer_impl = {
+	.destroy = gles_destroy,
+	.get_texture_formats = gles_get_texture_formats,
+	.get_render_formats = gles_get_render_formats,
+	.get_drm_fd = gles_get_drm_fd,
+	.texture_from_buffer = gles_texture_from_buffer,
+	.begin_buffer_pass = gles_begin_buffer_pass,
+	.render_timer_create = gles_render_timer_create,
+};
+
+static const struct wlr_render_timer_impl render_timer_impl = {
+	.get_duration_ns = gles_get_render_time,
+	.destroy = gles_render_timer_destroy,
+};
+
+void push_gles_debug_(struct wlr_gles_renderer *renderer,
+		const char *file, const char *func) {
+	if (!renderer->procs.glPushDebugGroupKHR) {
+		return;
+	}
+
+	int len = snprintf(NULL, 0, "%s:%s", file, func) + 1;
+	char str[len];
+	snprintf(str, len, "%s:%s", file, func);
+	renderer->procs.glPushDebugGroupKHR(GL_DEBUG_SOURCE_APPLICATION_KHR, 1, -1, str);
+}
+
+void pop_gles_debug(struct wlr_gles_renderer *renderer) {
+	if (renderer->procs.glPopDebugGroupKHR) {
+		renderer->procs.glPopDebugGroupKHR();
+	}
+}
+
+static enum wlr_log_importance gles_log_importance_to_wlr(GLenum type) {
+	switch (type) {
+	case GL_DEBUG_TYPE_ERROR_KHR:               return WLR_ERROR;
+	case GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR_KHR: return WLR_DEBUG;
+	case GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR_KHR:  return WLR_ERROR;
+	case GL_DEBUG_TYPE_PORTABILITY_KHR:         return WLR_DEBUG;
+	case GL_DEBUG_TYPE_PERFORMANCE_KHR:         return WLR_DEBUG;
+	case GL_DEBUG_TYPE_OTHER_KHR:               return WLR_DEBUG;
+	case GL_DEBUG_TYPE_MARKER_KHR:              return WLR_DEBUG;
+	case GL_DEBUG_TYPE_PUSH_GROUP_KHR:          return WLR_DEBUG;
+	case GL_DEBUG_TYPE_POP_GROUP_KHR:           return WLR_DEBUG;
+	default:                                    return WLR_DEBUG;
+	}
+}
+
+static void gles_log(GLenum src, GLenum type, GLuint id, GLenum severity,
+		GLsizei len, const GLchar *msg, const void *user) {
+	_wlr_log(gles_log_importance_to_wlr(type), "[GLES] %s", msg);
+}
+
+static GLuint compile_shader(struct wlr_gles_renderer *renderer,
+		GLenum type, const GLchar *src) {
+	push_gles_debug(renderer);
+
+	GLuint shader = glCreateShader(type);
+	glShaderSource(shader, 1, &src, NULL);
+	glCompileShader(shader);
+
+	GLint ok;
+	glGetShaderiv(shader, GL_COMPILE_STATUS, &ok);
+	if (ok == GL_FALSE) {
+		wlr_log(WLR_ERROR, "Failed to compile shader");
+		glDeleteShader(shader);
+		shader = 0;
+	}
+
+	pop_gles_debug(renderer);
+	return shader;
+}
+
+static GLuint link_program(struct wlr_gles_renderer *renderer,
+		const GLchar *vert_src, const GLchar *frag_src) {
+	push_gles_debug(renderer);
+
+	GLuint vert = compile_shader(renderer, GL_VERTEX_SHADER, vert_src);
+	if (!vert) {
+		goto error;
+	}
+
+	GLuint frag = compile_shader(renderer, GL_FRAGMENT_SHADER, frag_src);
+	if (!frag) {
+		glDeleteShader(vert);
+		goto error;
+	}
+
+	GLuint prog = glCreateProgram();
+	glAttachShader(prog, vert);
+	glAttachShader(prog, frag);
+	glLinkProgram(prog);
+
+	glDetachShader(prog, vert);
+	glDetachShader(prog, frag);
+	glDeleteShader(vert);
+	glDeleteShader(frag);
+
+	GLint ok;
+	glGetProgramiv(prog, GL_LINK_STATUS, &ok);
+	if (ok == GL_FALSE) {
+		wlr_log(WLR_ERROR, "Failed to link shader");
+		glDeleteProgram(prog);
+		goto error;
+	}
+
+	pop_gles_debug(renderer);
+	return prog;
+
+error:
+	pop_gles_debug(renderer);
+	return 0;
+}
+
+static bool check_gl_ext(const char *exts, const char *ext) {
+	size_t extlen = strlen(ext);
+	const char *end = exts + strlen(exts);
+
+	while (exts < end) {
+		if (exts[0] == ' ') {
+			exts++;
+			continue;
+		}
+		size_t n = strcspn(exts, " ");
+		if (n == extlen && strncmp(ext, exts, n) == 0) {
+			return true;
+		}
+		exts += n;
+	}
+	return false;
+}
+
+static void load_gl_proc(void *proc_ptr, const char *name) {
+	void *proc = (void *)eglGetProcAddress(name);
+	if (proc == NULL) {
+		wlr_log(WLR_ERROR, "eglGetProcAddress(%s) failed", name);
+		abort();
+	}
+	*(void **)proc_ptr = proc;
+}
+
+struct wlr_renderer *wlr_gles_renderer_create_with_drm_fd(int drm_fd,
+		enum egl_version version) {
+	struct wlr_egl *egl = wlr_egl_create_with_drm_fd(drm_fd, version);
+	if (egl == NULL) {
+		wlr_log(WLR_ERROR, "Could not initialize EGL");
+		return NULL;
+	}
+
+	struct wlr_renderer *renderer = wlr_gles_renderer_create(egl);
+	if (!renderer) {
+		wlr_log(WLR_ERROR, "Failed to create GLES renderer");
+		wlr_egl_destroy(egl);
+		return NULL;
+	}
+
+	return renderer;
+}
+
+struct wlr_renderer *wlr_gles_renderer_create(struct wlr_egl *egl) {
+	if (!wlr_egl_make_current(egl, NULL)) {
+		return NULL;
+	}
+
+	const char *exts_str = (const char *)glGetString(GL_EXTENSIONS);
+	if (exts_str == NULL) {
+		wlr_log(WLR_ERROR, "Failed to get GL_EXTENSIONS");
+		return NULL;
+	}
+
+	struct wlr_gles_renderer *renderer = calloc(1, sizeof(*renderer));
+	if (renderer == NULL) {
+		return NULL;
+	}
+	wlr_renderer_init(&renderer->wlr_renderer, &renderer_impl, WLR_BUFFER_CAP_DMABUF);
+	renderer->wlr_renderer.features.output_color_transform = false;
+
+	wl_list_init(&renderer->buffers);
+	wl_list_init(&renderer->textures);
+
+	renderer->egl = egl;
+	renderer->exts_str = exts_str;
+	renderer->drm_fd = -1;
+
+	wlr_log(WLR_INFO, "Creating GLES renderer");
+	wlr_log(WLR_INFO, "Using %s", glGetString(GL_VERSION));
+	wlr_log(WLR_INFO, "GL vendor: %s", glGetString(GL_VENDOR));
+	wlr_log(WLR_INFO, "GL renderer: %s", glGetString(GL_RENDERER));
+	wlr_log(WLR_INFO, "Supported GLES extensions: %s", exts_str);
+
+	if (!renderer->egl->exts.EXT_image_dma_buf_import) {
+		wlr_log(WLR_ERROR, "EGL_EXT_image_dma_buf_import not supported");
+		free(renderer);
+		return NULL;
+	}
+	if (!check_gl_ext(exts_str, "GL_EXT_texture_format_BGRA8888")) {
+		wlr_log(WLR_ERROR, "BGRA8888 format not supported by GLES");
+		free(renderer);
+		return NULL;
+	}
+	if (!check_gl_ext(exts_str, "GL_EXT_unpack_subimage")) {
+		wlr_log(WLR_ERROR, "GL_EXT_unpack_subimage not supported");
+		free(renderer);
+		return NULL;
+	}
+
+	renderer->exts.EXT_read_format_bgra =
+		check_gl_ext(exts_str, "GL_EXT_read_format_bgra");
+
+	renderer->exts.EXT_texture_type_2_10_10_10_REV =
+		check_gl_ext(exts_str, "GL_EXT_texture_type_2_10_10_10_REV");
+
+	renderer->exts.OES_texture_half_float_linear =
+		check_gl_ext(exts_str, "GL_OES_texture_half_float_linear");
+
+	renderer->exts.EXT_texture_norm16 =
+		check_gl_ext(exts_str, "GL_EXT_texture_norm16");
+
+	if (check_gl_ext(exts_str, "GL_KHR_debug")) {
+		renderer->exts.KHR_debug = true;
+		load_gl_proc(&renderer->procs.glDebugMessageCallbackKHR,
+			"glDebugMessageCallbackKHR");
+		load_gl_proc(&renderer->procs.glDebugMessageControlKHR,
+			"glDebugMessageControlKHR");
+	}
+
+	if (check_gl_ext(exts_str, "GL_OES_EGL_image_external")) {
+		renderer->exts.OES_egl_image_external = true;
+		load_gl_proc(&renderer->procs.glEGLImageTargetTexture2DOES,
+			"glEGLImageTargetTexture2DOES");
+	}
+
+	if (check_gl_ext(exts_str, "GL_OES_EGL_image")) {
+		renderer->exts.OES_egl_image = true;
+		load_gl_proc(&renderer->procs.glEGLImageTargetRenderbufferStorageOES,
+			"glEGLImageTargetRenderbufferStorageOES");
+	}
+
+	if (check_gl_ext(exts_str, "GL_KHR_robustness")) {
+		GLint notif_strategy = 0;
+		glGetIntegerv(GL_RESET_NOTIFICATION_STRATEGY_KHR, &notif_strategy);
+		switch (notif_strategy) {
+		case GL_LOSE_CONTEXT_ON_RESET_KHR:
+			wlr_log(WLR_DEBUG, "GPU reset notifications are enabled");
+			load_gl_proc(&renderer->procs.glGetGraphicsResetStatusKHR,
+				"glGetGraphicsResetStatusKHR");
+			break;
+		case GL_NO_RESET_NOTIFICATION_KHR:
+			wlr_log(WLR_DEBUG, "GPU reset notifications are disabled");
+			break;
+		}
+	}
+
+	if (check_gl_ext(exts_str, "GL_EXT_disjoint_timer_query")) {
+		renderer->exts.EXT_disjoint_timer_query = true;
+		load_gl_proc(&renderer->procs.glGenQueriesEXT, "glGenQueriesEXT");
+		load_gl_proc(&renderer->procs.glDeleteQueriesEXT, "glDeleteQueriesEXT");
+		load_gl_proc(&renderer->procs.glQueryCounterEXT, "glQueryCounterEXT");
+		load_gl_proc(&renderer->procs.glGetQueryObjectivEXT, "glGetQueryObjectivEXT");
+		load_gl_proc(&renderer->procs.glGetQueryObjectui64vEXT, "glGetQueryObjectui64vEXT");
+		if (eglGetProcAddress("glGetInteger64vEXT")) {
+			load_gl_proc(&renderer->procs.glGetInteger64vEXT, "glGetInteger64vEXT");
+		} else {
+			load_gl_proc(&renderer->procs.glGetInteger64vEXT, "glGetInteger64v");
+		}
+	}
+
+	if (renderer->exts.KHR_debug) {
+		glEnable(GL_DEBUG_OUTPUT_KHR);
+		glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS_KHR);
+		renderer->procs.glDebugMessageCallbackKHR(gles_log, NULL);
+
+		// Silence unwanted message types
+		renderer->procs.glDebugMessageControlKHR(GL_DONT_CARE,
+			GL_DEBUG_TYPE_POP_GROUP_KHR, GL_DONT_CARE, 0, NULL, GL_FALSE);
+		renderer->procs.glDebugMessageControlKHR(GL_DONT_CARE,
+			GL_DEBUG_TYPE_PUSH_GROUP_KHR, GL_DONT_CARE, 0, NULL, GL_FALSE);
+	}
+
+	push_gles_debug(renderer);
+
+	GLuint prog;
+	renderer->shaders.quad.program = prog =
+		link_program(renderer, gles2_common_vert_src, gles2_quad_frag_src);
+	if (!renderer->shaders.quad.program) {
+		goto error;
+	}
+	renderer->shaders.quad.proj = glGetUniformLocation(prog, "proj");
+	renderer->shaders.quad.color = glGetUniformLocation(prog, "color");
+	renderer->shaders.quad.pos_attrib = glGetAttribLocation(prog, "pos");
+
+	renderer->shaders.tex_rgba.program = prog =
+		link_program(renderer, gles2_common_vert_src, gles2_tex_rgba_frag_src);
+	if (!renderer->shaders.tex_rgba.program) {
+		goto error;
+	}
+	renderer->shaders.tex_rgba.proj = glGetUniformLocation(prog, "proj");
+	renderer->shaders.tex_rgba.tex_proj = glGetUniformLocation(prog, "tex_proj");
+	renderer->shaders.tex_rgba.tex = glGetUniformLocation(prog, "tex");
+	renderer->shaders.tex_rgba.alpha = glGetUniformLocation(prog, "alpha");
+	renderer->shaders.tex_rgba.pos_attrib = glGetAttribLocation(prog, "pos");
+
+	renderer->shaders.tex_rgbx.program = prog =
+		link_program(renderer, gles2_common_vert_src, gles2_tex_rgbx_frag_src);
+	if (!renderer->shaders.tex_rgbx.program) {
+		goto error;
+	}
+	renderer->shaders.tex_rgbx.proj = glGetUniformLocation(prog, "proj");
+	renderer->shaders.tex_rgbx.tex_proj = glGetUniformLocation(prog, "tex_proj");
+	renderer->shaders.tex_rgbx.tex = glGetUniformLocation(prog, "tex");
+	renderer->shaders.tex_rgbx.alpha = glGetUniformLocation(prog, "alpha");
+	renderer->shaders.tex_rgbx.pos_attrib = glGetAttribLocation(prog, "pos");
+
+	if (renderer->exts.OES_egl_image_external) {
+		renderer->shaders.tex_ext.program = prog =
+			link_program(renderer, gles2_common_vert_src, gles2_tex_external_frag_src);
+		if (!renderer->shaders.tex_ext.program) {
+			goto error;
+		}
+		renderer->shaders.tex_ext.proj = glGetUniformLocation(prog, "proj");
+		renderer->shaders.tex_ext.tex_proj = glGetUniformLocation(prog, "tex_proj");
+		renderer->shaders.tex_ext.tex = glGetUniformLocation(prog, "tex");
+		renderer->shaders.tex_ext.alpha = glGetUniformLocation(prog, "alpha");
+		renderer->shaders.tex_ext.pos_attrib = glGetAttribLocation(prog, "pos");
+	}
+
+	pop_gles_debug(renderer);
+
+	wlr_egl_unset_current(renderer->egl);
+
+	get_gles_shm_formats(renderer, &renderer->shm_texture_formats);
+
+	int drm_fd = wlr_renderer_get_drm_fd(&renderer->wlr_renderer);
+	uint64_t cap_syncobj_timeline;
+	if (drm_fd >= 0 && drmGetCap(drm_fd, DRM_CAP_SYNCOBJ_TIMELINE, &cap_syncobj_timeline) == 0) {
+		renderer->wlr_renderer.features.timeline = egl->procs.eglDupNativeFenceFDANDROID &&
+			egl->procs.eglWaitSyncKHR && cap_syncobj_timeline != 0;
+	}
+
+	return &renderer->wlr_renderer;
+
+error:
+	glDeleteProgram(renderer->shaders.quad.program);
+	glDeleteProgram(renderer->shaders.tex_rgba.program);
+	glDeleteProgram(renderer->shaders.tex_rgbx.program);
+	glDeleteProgram(renderer->shaders.tex_ext.program);
+
+	pop_gles_debug(renderer);
+
+	if (renderer->exts.KHR_debug) {
+		glDisable(GL_DEBUG_OUTPUT_KHR);
+		renderer->procs.glDebugMessageCallbackKHR(NULL, NULL);
+	}
+
+	wlr_egl_unset_current(renderer->egl);
+
+	free(renderer);
+	return NULL;
+}
+
+bool wlr_gles_renderer_check_ext(struct wlr_renderer *wlr_renderer,
+		const char *ext) {
+	struct wlr_gles_renderer *renderer = gles_get_renderer(wlr_renderer);
+	return check_gl_ext(renderer->exts_str, ext);
+}

render/gles/shaders/embed.sh

@@ -0,0 +1,11 @@
+#!/bin/sh -eu
+
+var=${1:-data}
+hex="$(od -A n -t x1 -v)"
+
+echo "static const char $var[] = {"
+for byte in $hex; do
+	echo "	0x$byte,"
+done
+echo "	0x00,"
+echo "};"

render/gles/shaders/gles2_common.vert

@@ -0,0 +1,10 @@
+uniform mat3 proj;
+uniform mat3 tex_proj;
+attribute vec2 pos;
+varying vec2 v_texcoord;
+
+void main() {
+	vec3 pos3 = vec3(pos, 1.0);
+	gl_Position = vec4(pos3 * proj, 1.0);
+	v_texcoord = (pos3 * tex_proj).xy;
+}

render/gles/shaders/gles2_quad.frag

@@ -0,0 +1,13 @@
+#ifdef GL_FRAGMENT_PRECISION_HIGH
+precision highp float;
+#else
+precision mediump float;
+#endif
+
+varying vec4 v_color;
+varying vec2 v_texcoord;
+uniform vec4 color;
+
+void main() {
+	gl_FragColor = color;
+}

render/gles/shaders/gles2_tex_external.frag

@@ -0,0 +1,15 @@
+#extension GL_OES_EGL_image_external : require
+
+#ifdef GL_FRAGMENT_PRECISION_HIGH
+precision highp float;
+#else
+precision mediump float;
+#endif
+
+varying vec2 v_texcoord;
+uniform samplerExternalOES texture0;
+uniform float alpha;
+
+void main() {
+	gl_FragColor = texture2D(texture0, v_texcoord) * alpha;
+}

render/gles/shaders/gles2_tex_rgba.frag

@@ -0,0 +1,13 @@
+#ifdef GL_FRAGMENT_PRECISION_HIGH
+precision highp float;
+#else
+precision mediump float;
+#endif
+
+varying vec2 v_texcoord;
+uniform sampler2D tex;
+uniform float alpha;
+
+void main() {
+	gl_FragColor = texture2D(tex, v_texcoord) * alpha;
+}

render/gles/shaders/gles2_tex_rgbx.frag

@@ -0,0 +1,13 @@
+#ifdef GL_FRAGMENT_PRECISION_HIGH
+precision highp float;
+#else
+precision mediump float;
+#endif
+
+varying vec2 v_texcoord;
+uniform sampler2D tex;
+uniform float alpha;
+
+void main() {
+	gl_FragColor = vec4(texture2D(tex, v_texcoord).rgb, 1.0) * alpha;
+}

render/gles/shaders/meson.build

@@ -0,0 +1,30 @@
+embed = find_program('./embed.sh', native: true)
+
+shaders = [
+	'gles2_common.vert',
+	'gles2_quad.frag',
+	'gles2_tex_rgba.frag',
+	'gles2_tex_rgbx.frag',
+	'gles2_tex_external.frag',
+]
+
+foreach name : shaders
+	custom_target(
+		'gles-' + name,
+		input: name,
+		output: name + '_check',
+		command: [glslang, '@INPUT@'],
+		build_by_default: true,
+	)
+
+	output = name.underscorify() + '_src.h'
+	var = name.underscorify() + '_src'
+	wlr_files += custom_target(
+		output,
+		command: [embed, var],
+		input: name,
+		output: output,
+		feed: true,
+		capture: true,
+	)
+endforeach

render/gles/texture.c

@@ -0,0 +1,440 @@
+#include <assert.h>
+#include <drm_fourcc.h>
+#include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <wayland-server-protocol.h>
+#include <wayland-util.h>
+#include <wlr/render/egl.h>
+#include <wlr/render/interface.h>
+#include <wlr/render/wlr_texture.h>
+#include <wlr/util/log.h>
+#include "render/egl.h"
+#include "render/gles.h"
+#include "render/pixel_format.h"
+
+static const struct wlr_texture_impl texture_impl;
+
+bool wlr_texture_is_gles(struct wlr_texture *wlr_texture) {
+	return wlr_texture->impl == &texture_impl;
+}
+
+struct wlr_gles_texture *gles_get_texture(
+		struct wlr_texture *wlr_texture) {
+	assert(wlr_texture_is_gles(wlr_texture));
+	struct wlr_gles_texture *texture = wl_container_of(wlr_texture, texture, wlr_texture);
+	return texture;
+}
+
+static bool gles_texture_update_from_buffer(struct wlr_texture *wlr_texture,
+		struct wlr_buffer *buffer, const pixman_region32_t *damage) {
+	struct wlr_gles_texture *texture = gles_get_texture(wlr_texture);
+
+	if (texture->drm_format == DRM_FORMAT_INVALID) {
+		return false;
+	}
+
+	void *data;
+	uint32_t format;
+	size_t stride;
+	if (!wlr_buffer_begin_data_ptr_access(buffer,
+			WLR_BUFFER_DATA_PTR_ACCESS_READ, &data, &format, &stride)) {
+		return false;
+	}
+
+	if (format != texture->drm_format) {
+		wlr_buffer_end_data_ptr_access(buffer);
+		return false;
+	}
+
+	const struct wlr_gles_pixel_format *fmt =
+		get_gles_format_from_drm(texture->drm_format);
+	assert(fmt);
+
+	const struct wlr_pixel_format_info *drm_fmt =
+		drm_get_pixel_format_info(texture->drm_format);
+	assert(drm_fmt);
+	if (pixel_format_info_pixels_per_block(drm_fmt) != 1) {
+		wlr_buffer_end_data_ptr_access(buffer);
+		wlr_log(WLR_ERROR, "Cannot update texture: block formats are not supported");
+		return false;
+	}
+
+	if (!pixel_format_info_check_stride(drm_fmt, stride, buffer->width)) {
+		wlr_buffer_end_data_ptr_access(buffer);
+		return false;
+	}
+
+	struct wlr_egl_context prev_ctx;
+	wlr_egl_make_current(texture->renderer->egl, &prev_ctx);
+
+	push_gles_debug(texture->renderer);
+
+	glBindTexture(GL_TEXTURE_2D, texture->tex);
+
+	int rects_len = 0;
+	const pixman_box32_t *rects = pixman_region32_rectangles(damage, &rects_len);
+
+	for (int i = 0; i < rects_len; i++) {
+		pixman_box32_t rect = rects[i];
+
+		glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, stride / drm_fmt->bytes_per_block);
+		glPixelStorei(GL_UNPACK_SKIP_PIXELS_EXT, rect.x1);
+		glPixelStorei(GL_UNPACK_SKIP_ROWS_EXT, rect.y1);
+
+		int width = rect.x2 - rect.x1;
+		int height = rect.y2 - rect.y1;
+		glTexSubImage2D(GL_TEXTURE_2D, 0, rect.x1, rect.y1, width, height,
+			fmt->gl_format, fmt->gl_type, data);
+	}
+
+	glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, 0);
+	glPixelStorei(GL_UNPACK_SKIP_PIXELS_EXT, 0);
+	glPixelStorei(GL_UNPACK_SKIP_ROWS_EXT, 0);
+
+	glBindTexture(GL_TEXTURE_2D, 0);
+
+	pop_gles_debug(texture->renderer);
+
+	wlr_egl_restore_context(&prev_ctx);
+
+	wlr_buffer_end_data_ptr_access(buffer);
+
+	return true;
+}
+
+void gles_texture_destroy(struct wlr_gles_texture *texture) {
+	wl_list_remove(&texture->link);
+	if (texture->buffer != NULL) {
+		wlr_buffer_unlock(texture->buffer->buffer);
+	} else {
+		struct wlr_egl_context prev_ctx;
+		wlr_egl_make_current(texture->renderer->egl, &prev_ctx);
+
+		push_gles_debug(texture->renderer);
+
+		glDeleteTextures(1, &texture->tex);
+		glDeleteFramebuffers(1, &texture->fbo);
+
+		pop_gles_debug(texture->renderer);
+
+		wlr_egl_restore_context(&prev_ctx);
+	}
+
+	free(texture);
+}
+
+static void handle_gles_texture_destroy(struct wlr_texture *wlr_texture) {
+	gles_texture_destroy(gles_get_texture(wlr_texture));
+}
+
+static bool gles_texture_bind(struct wlr_gles_texture *texture) {
+	if (texture->fbo) {
+		glBindFramebuffer(GL_FRAMEBUFFER, texture->fbo);
+	} else if (texture->buffer) {
+		if (texture->buffer->external_only) {
+			return false;
+		}
+
+		GLuint fbo = gles_buffer_get_fbo(texture->buffer);
+		if (!fbo) {
+			return false;
+		}
+
+		glBindFramebuffer(GL_FRAMEBUFFER, fbo);
+	} else {
+		glGenFramebuffers(1, &texture->fbo);
+		glBindFramebuffer(GL_FRAMEBUFFER, texture->fbo);
+		glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+			texture->target, texture->tex, 0);
+
+		GLenum fb_status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
+		if (fb_status != GL_FRAMEBUFFER_COMPLETE) {
+			wlr_log(WLR_ERROR, "Failed to create FBO");
+			glDeleteFramebuffers(1, &texture->fbo);
+			texture->fbo = 0;
+
+			glBindFramebuffer(GL_FRAMEBUFFER, 0);
+			return false;
+		}
+	}
+
+	return true;
+}
+
+static bool gles_texture_read_pixels(struct wlr_texture *wlr_texture,
+		const struct wlr_texture_read_pixels_options *options) {
+	struct wlr_gles_texture *texture = gles_get_texture(wlr_texture);
+
+	struct wlr_box src;
+	wlr_texture_read_pixels_options_get_src_box(options, wlr_texture, &src);
+
+	const struct wlr_gles_pixel_format *fmt =
+		get_gles_format_from_drm(options->format);
+	if (fmt == NULL || !is_gles_pixel_format_supported(texture->renderer, fmt)) {
+		wlr_log(WLR_ERROR, "Cannot read pixels: unsupported pixel format 0x%"PRIX32, options->format);
+		return false;
+	}
+
+	if (fmt->gl_format == GL_BGRA_EXT && !texture->renderer->exts.EXT_read_format_bgra) {
+		wlr_log(WLR_ERROR,
+			"Cannot read pixels: missing GL_EXT_read_format_bgra extension");
+		return false;
+	}
+
+	const struct wlr_pixel_format_info *drm_fmt =
+		drm_get_pixel_format_info(fmt->drm_format);
+	assert(drm_fmt);
+	if (pixel_format_info_pixels_per_block(drm_fmt) != 1) {
+		wlr_log(WLR_ERROR, "Cannot read pixels: block formats are not supported");
+		return false;
+	}
+
+	push_gles_debug(texture->renderer);
+	struct wlr_egl_context prev_ctx;
+	if (!wlr_egl_make_current(texture->renderer->egl, &prev_ctx)) {
+		return false;
+	}
+
+	if (!gles_texture_bind(texture)) {
+		return false;
+	}
+
+	// Make sure any pending drawing is finished before we try to read it
+	glFinish();
+
+	glGetError(); // Clear the error flag
+
+	unsigned char *p = wlr_texture_read_pixel_options_get_data(options);
+
+	glPixelStorei(GL_PACK_ALIGNMENT, 1);
+	uint32_t pack_stride = pixel_format_info_min_stride(drm_fmt, src.width);
+	if (pack_stride == options->stride && options->dst_x == 0) {
+		// Under these particular conditions, we can read the pixels with only
+		// one glReadPixels call
+
+		glReadPixels(src.x, src.y, src.width, src.height, fmt->gl_format, fmt->gl_type, p);
+	} else {
+		// Unfortunately GLES doesn't support GL_PACK_ROW_LENGTH, so we have to read
+		// the lines out row by row
+		for (int32_t i = 0; i < src.height; ++i) {
+			uint32_t y = src.y + i;
+			glReadPixels(src.x, y, src.width, 1, fmt->gl_format,
+				fmt->gl_type, p + i * options->stride);
+		}
+	}
+
+	wlr_egl_restore_context(&prev_ctx);
+	pop_gles_debug(texture->renderer);
+
+	return glGetError() == GL_NO_ERROR;
+}
+
+static uint32_t gles_texture_preferred_read_format(struct wlr_texture *wlr_texture) {
+	struct wlr_gles_texture *texture = gles_get_texture(wlr_texture);
+
+	push_gles_debug(texture->renderer);
+
+	uint32_t fmt = DRM_FORMAT_INVALID;
+
+	struct wlr_egl_context prev_ctx;
+	if (!wlr_egl_make_current(texture->renderer->egl, &prev_ctx)) {
+		return fmt;
+	}
+
+	if (!gles_texture_bind(texture)) {
+		goto out;
+	}
+
+	GLint gl_format = -1, gl_type = -1, alpha_size = -1;
+	glGetIntegerv(GL_IMPLEMENTATION_COLOR_READ_FORMAT, &gl_format);
+	glGetIntegerv(GL_IMPLEMENTATION_COLOR_READ_TYPE, &gl_type);
+	glGetIntegerv(GL_ALPHA_BITS, &alpha_size);
+
+	glBindFramebuffer(GL_FRAMEBUFFER, 0);
+	pop_gles_debug(texture->renderer);
+
+	const struct wlr_gles_pixel_format *pix_fmt =
+		get_gles_format_from_gl(gl_format, gl_type, alpha_size > 0);
+	if (pix_fmt != NULL) {
+		fmt = pix_fmt->drm_format;
+		goto out;
+	}
+
+	if (texture->renderer->exts.EXT_read_format_bgra) {
+		fmt = DRM_FORMAT_XRGB8888;
+		goto out;
+	}
+
+out:
+	wlr_egl_restore_context(&prev_ctx);
+	return fmt;
+}
+
+static const struct wlr_texture_impl texture_impl = {
+	.update_from_buffer = gles_texture_update_from_buffer,
+	.read_pixels = gles_texture_read_pixels,
+	.preferred_read_format = gles_texture_preferred_read_format,
+	.destroy = handle_gles_texture_destroy,
+};
+
+static struct wlr_gles_texture *gles_texture_create(
+		struct wlr_gles_renderer *renderer, uint32_t width, uint32_t height) {
+	struct wlr_gles_texture *texture = calloc(1, sizeof(*texture));
+	if (texture == NULL) {
+		wlr_log_errno(WLR_ERROR, "Allocation failed");
+		return NULL;
+	}
+	wlr_texture_init(&texture->wlr_texture, &renderer->wlr_renderer,
+		&texture_impl, width, height);
+	texture->renderer = renderer;
+	wl_list_insert(&renderer->textures, &texture->link);
+	return texture;
+}
+
+static struct wlr_texture *gles_texture_from_pixels(
+		struct wlr_renderer *wlr_renderer,
+		uint32_t drm_format, uint32_t stride, uint32_t width,
+		uint32_t height, const void *data) {
+	struct wlr_gles_renderer *renderer = gles_get_renderer(wlr_renderer);
+
+	const struct wlr_gles_pixel_format *fmt =
+		get_gles_format_from_drm(drm_format);
+	if (fmt == NULL) {
+		wlr_log(WLR_ERROR, "Unsupported pixel format 0x%"PRIX32, drm_format);
+		return NULL;
+	}
+
+	const struct wlr_pixel_format_info *drm_fmt =
+		drm_get_pixel_format_info(drm_format);
+	assert(drm_fmt);
+	if (pixel_format_info_pixels_per_block(drm_fmt) != 1) {
+		wlr_log(WLR_ERROR, "Cannot upload texture: block formats are not supported");
+		return NULL;
+	}
+
+	if (!pixel_format_info_check_stride(drm_fmt, stride, width)) {
+		return NULL;
+	}
+
+	struct wlr_gles_texture *texture =
+		gles_texture_create(renderer, width, height);
+	if (texture == NULL) {
+		return NULL;
+	}
+	texture->target = GL_TEXTURE_2D;
+	texture->has_alpha = pixel_format_has_alpha(fmt->drm_format);
+	texture->drm_format = fmt->drm_format;
+
+	GLint internal_format = fmt->gl_internalformat;
+	if (!internal_format) {
+		internal_format = fmt->gl_format;
+	}
+
+	struct wlr_egl_context prev_ctx;
+	wlr_egl_make_current(renderer->egl, &prev_ctx);
+
+	push_gles_debug(renderer);
+
+	glGenTextures(1, &texture->tex);
+	glBindTexture(GL_TEXTURE_2D, texture->tex);
+
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+	glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, stride / drm_fmt->bytes_per_block);
+	glTexImage2D(GL_TEXTURE_2D, 0, internal_format, width, height, 0,
+		fmt->gl_format, fmt->gl_type, data);
+	glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, 0);
+
+	glBindTexture(GL_TEXTURE_2D, 0);
+
+	pop_gles_debug(renderer);
+
+	wlr_egl_restore_context(&prev_ctx);
+
+	return &texture->wlr_texture;
+}
+
+static struct wlr_texture *gles_texture_from_dmabuf(
+		struct wlr_gles_renderer *renderer, struct wlr_buffer *wlr_buffer,
+		struct wlr_dmabuf_attributes *attribs) {
+	if (!renderer->procs.glEGLImageTargetTexture2DOES) {
+		return NULL;
+	}
+
+	struct wlr_gles_buffer *buffer = gles_buffer_get_or_create(renderer, wlr_buffer);
+	if (!buffer) {
+		return NULL;
+	}
+
+	struct wlr_gles_texture *texture =
+		gles_texture_create(renderer, attribs->width, attribs->height);
+	if (texture == NULL) {
+		return NULL;
+	}
+
+	texture->target = buffer->external_only ? GL_TEXTURE_EXTERNAL_OES : GL_TEXTURE_2D;
+	texture->buffer = buffer;
+	texture->drm_format = DRM_FORMAT_INVALID; // texture can't be written anyways
+	texture->has_alpha = pixel_format_has_alpha(attribs->format);
+
+	struct wlr_egl_context prev_ctx;
+	wlr_egl_make_current(renderer->egl, &prev_ctx);
+	push_gles_debug(texture->renderer);
+
+	bool invalid;
+	if (!buffer->tex) {
+		glGenTextures(1, &buffer->tex);
+		invalid = true;
+	} else {
+		// External changes are immediately made visible by the GL implementation
+		invalid = !buffer->external_only;
+	}
+
+	if (invalid) {
+		glBindTexture(texture->target, buffer->tex);
+		glTexParameteri(texture->target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+		glTexParameteri(texture->target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+		renderer->procs.glEGLImageTargetTexture2DOES(texture->target, buffer->image);
+		glBindTexture(texture->target, 0);
+	}
+
+	pop_gles_debug(texture->renderer);
+	wlr_egl_restore_context(&prev_ctx);
+
+	texture->tex = buffer->tex;
+	wlr_buffer_lock(texture->buffer->buffer);
+	return &texture->wlr_texture;
+}
+
+struct wlr_texture *gles_texture_from_buffer(struct wlr_renderer *wlr_renderer,
+		struct wlr_buffer *buffer) {
+	struct wlr_gles_renderer *renderer = gles_get_renderer(wlr_renderer);
+
+	void *data;
+	uint32_t format;
+	size_t stride;
+	struct wlr_dmabuf_attributes dmabuf;
+	if (wlr_buffer_get_dmabuf(buffer, &dmabuf)) {
+		return gles_texture_from_dmabuf(renderer, buffer, &dmabuf);
+	} else if (wlr_buffer_begin_data_ptr_access(buffer,
+			WLR_BUFFER_DATA_PTR_ACCESS_READ, &data, &format, &stride)) {
+		struct wlr_texture *tex = gles_texture_from_pixels(wlr_renderer,
+			format, stride, buffer->width, buffer->height, data);
+		wlr_buffer_end_data_ptr_access(buffer);
+		return tex;
+	} else {
+		return NULL;
+	}
+}
+
+void wlr_gles_texture_get_attribs(struct wlr_texture *wlr_texture,
+		struct wlr_gles_texture_attribs *attribs) {
+	struct wlr_gles_texture *texture = gles_get_texture(wlr_texture);
+	*attribs = (struct wlr_gles_texture_attribs){
+		.target = texture->target,
+		.tex = texture->tex,
+		.has_alpha = texture->has_alpha,
+	};
+}