17 files changed, 3395 insertions, 636 deletions

diff --git a/render/egl.c b/render/egl.c
new file mode 100644
index 0000000..162634b
--- /dev/null
+++ b/render/egl.c
@@ -0,0 +1,1021 @@
+#define _POSIX_C_SOURCE 200809L
+#include <assert.h>
+#include <drm_fourcc.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <gbm.h>
+#include <wlr/render/egl.h>
+#include <wlr/util/log.h>
+#include <wlr/util/region.h>
+#include <xf86drm.h>
+#include "render/egl.h"
+#include "util/env.h"
+
+static enum wlr_log_importance egl_log_importance_to_wlr(EGLint type) {
+	switch (type) {
+	case EGL_DEBUG_MSG_CRITICAL_KHR: return WLR_ERROR;
+	case EGL_DEBUG_MSG_ERROR_KHR:    return WLR_ERROR;
+	case EGL_DEBUG_MSG_WARN_KHR:     return WLR_ERROR;
+	case EGL_DEBUG_MSG_INFO_KHR:     return WLR_INFO;
+	default:                         return WLR_INFO;
+	}
+}
+
+static const char *egl_error_str(EGLint error) {
+	switch (error) {
+	case EGL_SUCCESS:
+		return "EGL_SUCCESS";
+	case EGL_NOT_INITIALIZED:
+		return "EGL_NOT_INITIALIZED";
+	case EGL_BAD_ACCESS:
+		return "EGL_BAD_ACCESS";
+	case EGL_BAD_ALLOC:
+		return "EGL_BAD_ALLOC";
+	case EGL_BAD_ATTRIBUTE:
+		return "EGL_BAD_ATTRIBUTE";
+	case EGL_BAD_CONTEXT:
+		return "EGL_BAD_CONTEXT";
+	case EGL_BAD_CONFIG:
+		return "EGL_BAD_CONFIG";
+	case EGL_BAD_CURRENT_SURFACE:
+		return "EGL_BAD_CURRENT_SURFACE";
+	case EGL_BAD_DISPLAY:
+		return "EGL_BAD_DISPLAY";
+	case EGL_BAD_DEVICE_EXT:
+		return "EGL_BAD_DEVICE_EXT";
+	case EGL_BAD_SURFACE:
+		return "EGL_BAD_SURFACE";
+	case EGL_BAD_MATCH:
+		return "EGL_BAD_MATCH";
+	case EGL_BAD_PARAMETER:
+		return "EGL_BAD_PARAMETER";
+	case EGL_BAD_NATIVE_PIXMAP:
+		return "EGL_BAD_NATIVE_PIXMAP";
+	case EGL_BAD_NATIVE_WINDOW:
+		return "EGL_BAD_NATIVE_WINDOW";
+	case EGL_CONTEXT_LOST:
+		return "EGL_CONTEXT_LOST";
+	}
+	return "unknown error";
+}
+
+static void egl_log(EGLenum error, const char *command, EGLint msg_type,
+		EGLLabelKHR thread, EGLLabelKHR obj, const char *msg) {
+	_wlr_log(egl_log_importance_to_wlr(msg_type),
+		"[EGL] command: %s, error: %s (0x%x), message: \"%s\"",
+		command, egl_error_str(error), error, msg);
+}
+
+static bool check_egl_ext(const char *exts, const char *ext) {
+	size_t extlen = strlen(ext);
+	const char *end = exts + strlen(exts);
+
+	while (exts < end) {
+		if (*exts == ' ') {
+			exts++;
+			continue;
+		}
+		size_t n = strcspn(exts, " ");
+		if (n == extlen && strncmp(ext, exts, n) == 0) {
+			return true;
+		}
+		exts += n;
+	}
+	return false;
+}
+
+static void load_egl_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;
+}
+
+static int get_egl_dmabuf_formats(struct wlr_egl *egl, EGLint **formats);
+static int get_egl_dmabuf_modifiers(struct wlr_egl *egl, EGLint format,
+	uint64_t **modifiers, EGLBoolean **external_only);
+
+static void log_modifier(uint64_t modifier, bool external_only) {
+	char *mod_name = drmGetFormatModifierName(modifier);
+	wlr_log(WLR_DEBUG, "    %s (0x%016"PRIX64"): ✓ texture  %s render",
+		mod_name ? mod_name : "<unknown>", modifier, external_only ? "✗" : "✓");
+	free(mod_name);
+}
+
+static void init_dmabuf_formats(struct wlr_egl *egl) {
+	bool no_modifiers = env_parse_bool("WLR_EGL_NO_MODIFIERS");
+	if (no_modifiers) {
+		wlr_log(WLR_INFO, "WLR_EGL_NO_MODIFIERS set, disabling modifiers for EGL");
+	}
+
+	EGLint *formats;
+	int formats_len = get_egl_dmabuf_formats(egl, &formats);
+	if (formats_len < 0) {
+		return;
+	}
+
+	wlr_log(WLR_DEBUG, "Supported DMA-BUF formats:");
+
+	bool has_modifiers = false;
+	for (int i = 0; i < formats_len; i++) {
+		EGLint fmt = formats[i];
+
+		uint64_t *modifiers = NULL;
+		EGLBoolean *external_only = NULL;
+		int modifiers_len = 0;
+		if (!no_modifiers) {
+			modifiers_len = get_egl_dmabuf_modifiers(egl, fmt, &modifiers, &external_only);
+		}
+		if (modifiers_len < 0) {
+			continue;
+		}
+
+		has_modifiers = has_modifiers || modifiers_len > 0;
+
+		bool all_external_only = true;
+		for (int j = 0; j < modifiers_len; j++) {
+			wlr_drm_format_set_add(&egl->dmabuf_texture_formats, fmt,
+				modifiers[j]);
+			if (!external_only[j]) {
+				wlr_drm_format_set_add(&egl->dmabuf_render_formats, fmt,
+					modifiers[j]);
+				all_external_only = false;
+			}
+		}
+
+		// EGL always supports implicit modifiers. If at least one modifier supports rendering,
+		// assume the implicit modifier supports rendering too.
+		wlr_drm_format_set_add(&egl->dmabuf_texture_formats, fmt,
+			DRM_FORMAT_MOD_INVALID);
+		if (modifiers_len == 0 || !all_external_only) {
+			wlr_drm_format_set_add(&egl->dmabuf_render_formats, fmt,
+				DRM_FORMAT_MOD_INVALID);
+		}
+
+		if (modifiers_len == 0) {
+			// Asume the linear layout is supported if the driver doesn't
+			// explicitly say otherwise
+			wlr_drm_format_set_add(&egl->dmabuf_texture_formats, fmt,
+				DRM_FORMAT_MOD_LINEAR);
+			wlr_drm_format_set_add(&egl->dmabuf_render_formats, fmt,
+				DRM_FORMAT_MOD_LINEAR);
+		}
+
+		if (wlr_log_get_verbosity() >= WLR_DEBUG) {
+			char *fmt_name = drmGetFormatName(fmt);
+			wlr_log(WLR_DEBUG, "  %s (0x%08"PRIX32")",
+				fmt_name ? fmt_name : "<unknown>", fmt);
+			free(fmt_name);
+
+			log_modifier(DRM_FORMAT_MOD_INVALID, false);
+			if (modifiers_len == 0) {
+				log_modifier(DRM_FORMAT_MOD_LINEAR, false);
+			}
+			for (int j = 0; j < modifiers_len; j++) {
+				log_modifier(modifiers[j], external_only[j]);
+			}
+		}
+
+		free(modifiers);
+		free(external_only);
+	}
+	free(formats);
+
+	egl->has_modifiers = has_modifiers;
+	if (!no_modifiers) {
+		wlr_log(WLR_DEBUG, "EGL DMA-BUF format modifiers %s",
+			has_modifiers ? "supported" : "unsupported");
+	}
+}
+
+static struct wlr_egl *egl_create(void) {
+	const char *client_exts_str = eglQueryString(EGL_NO_DISPLAY, EGL_EXTENSIONS);
+	if (client_exts_str == NULL) {
+		if (eglGetError() == EGL_BAD_DISPLAY) {
+			wlr_log(WLR_ERROR, "EGL_EXT_client_extensions not supported");
+		} else {
+			wlr_log(WLR_ERROR, "Failed to query EGL client extensions");
+		}
+		return NULL;
+	}
+
+	wlr_log(WLR_INFO, "Supported EGL client extensions: %s", client_exts_str);
+
+	if (!check_egl_ext(client_exts_str, "EGL_EXT_platform_base")) {
+		wlr_log(WLR_ERROR, "EGL_EXT_platform_base not supported");
+		return NULL;
+	}
+
+	struct wlr_egl *egl = calloc(1, sizeof(*egl));
+	if (egl == NULL) {
+		wlr_log_errno(WLR_ERROR, "Allocation failed");
+		return NULL;
+	}
+
+	load_egl_proc(&egl->procs.eglGetPlatformDisplayEXT,
+		"eglGetPlatformDisplayEXT");
+
+	egl->exts.KHR_platform_gbm = check_egl_ext(client_exts_str,
+			"EGL_KHR_platform_gbm");
+	egl->exts.EXT_platform_device = check_egl_ext(client_exts_str,
+			"EGL_EXT_platform_device");
+	egl->exts.KHR_display_reference = check_egl_ext(client_exts_str,
+			"EGL_KHR_display_reference");
+
+	if (check_egl_ext(client_exts_str, "EGL_EXT_device_base") || check_egl_ext(client_exts_str, "EGL_EXT_device_enumeration")) {
+		load_egl_proc(&egl->procs.eglQueryDevicesEXT, "eglQueryDevicesEXT");
+	}
+
+	if (check_egl_ext(client_exts_str, "EGL_EXT_device_base") || check_egl_ext(client_exts_str, "EGL_EXT_device_query")) {
+		egl->exts.EXT_device_query = true;
+		load_egl_proc(&egl->procs.eglQueryDeviceStringEXT,
+			"eglQueryDeviceStringEXT");
+		load_egl_proc(&egl->procs.eglQueryDisplayAttribEXT,
+			"eglQueryDisplayAttribEXT");
+	}
+
+	if (check_egl_ext(client_exts_str, "EGL_KHR_debug")) {
+		load_egl_proc(&egl->procs.eglDebugMessageControlKHR,
+			"eglDebugMessageControlKHR");
+
+		static const EGLAttrib debug_attribs[] = {
+			EGL_DEBUG_MSG_CRITICAL_KHR, EGL_TRUE,
+			EGL_DEBUG_MSG_ERROR_KHR, EGL_TRUE,
+			EGL_DEBUG_MSG_WARN_KHR, EGL_TRUE,
+			EGL_DEBUG_MSG_INFO_KHR, EGL_TRUE,
+			EGL_NONE,
+		};
+		egl->procs.eglDebugMessageControlKHR(egl_log, debug_attribs);
+	}
+
+	if (eglBindAPI(EGL_OPENGL_ES_API) == EGL_FALSE) {
+		wlr_log(WLR_ERROR, "Failed to bind to the OpenGL ES API");
+		free(egl);
+		return NULL;
+	}
+
+	return egl;
+}
+
+static bool egl_init_display(struct wlr_egl *egl, EGLDisplay display) {
+	egl->display = display;
+
+	EGLint major, minor;
+	if (eglInitialize(egl->display, &major, &minor) == EGL_FALSE) {
+		wlr_log(WLR_ERROR, "Failed to initialize EGL");
+		return false;
+	}
+
+	const char *display_exts_str = eglQueryString(egl->display, EGL_EXTENSIONS);
+	if (display_exts_str == NULL) {
+		wlr_log(WLR_ERROR, "Failed to query EGL display extensions");
+		return false;
+	}
+
+	if (check_egl_ext(display_exts_str, "EGL_KHR_image_base")) {
+		egl->exts.KHR_image_base = true;
+		load_egl_proc(&egl->procs.eglCreateImageKHR, "eglCreateImageKHR");
+		load_egl_proc(&egl->procs.eglDestroyImageKHR, "eglDestroyImageKHR");
+	}
+
+	egl->exts.EXT_image_dma_buf_import =
+		check_egl_ext(display_exts_str, "EGL_EXT_image_dma_buf_import");
+	if (check_egl_ext(display_exts_str,
+			"EGL_EXT_image_dma_buf_import_modifiers")) {
+		egl->exts.EXT_image_dma_buf_import_modifiers = true;
+		load_egl_proc(&egl->procs.eglQueryDmaBufFormatsEXT,
+			"eglQueryDmaBufFormatsEXT");
+		load_egl_proc(&egl->procs.eglQueryDmaBufModifiersEXT,
+			"eglQueryDmaBufModifiersEXT");
+	}
+
+	egl->exts.EXT_create_context_robustness =
+		check_egl_ext(display_exts_str, "EGL_EXT_create_context_robustness");
+
+	const char *device_exts_str = NULL, *driver_name = NULL;
+	if (egl->exts.EXT_device_query) {
+		EGLAttrib device_attrib;
+		if (!egl->procs.eglQueryDisplayAttribEXT(egl->display,
+				EGL_DEVICE_EXT, &device_attrib)) {
+			wlr_log(WLR_ERROR, "eglQueryDisplayAttribEXT(EGL_DEVICE_EXT) failed");
+			return false;
+		}
+		egl->device = (EGLDeviceEXT)device_attrib;
+
+		device_exts_str =
+			egl->procs.eglQueryDeviceStringEXT(egl->device, EGL_EXTENSIONS);
+		if (device_exts_str == NULL) {
+			wlr_log(WLR_ERROR, "eglQueryDeviceStringEXT(EGL_EXTENSIONS) failed");
+			return false;
+		}
+
+		if (check_egl_ext(device_exts_str, "EGL_MESA_device_software")) {
+			if (env_parse_bool("WLR_RENDERER_ALLOW_SOFTWARE")) {
+				wlr_log(WLR_INFO, "Using software rendering");
+			} else {
+				wlr_log(WLR_ERROR, "Software rendering detected, please use "
+					"the WLR_RENDERER_ALLOW_SOFTWARE environment variable "
+					"to proceed");
+				return false;
+			}
+		}
+
+#ifdef EGL_DRIVER_NAME_EXT
+		if (check_egl_ext(device_exts_str, "EGL_EXT_device_persistent_id")) {
+			driver_name = egl->procs.eglQueryDeviceStringEXT(egl->device,
+				EGL_DRIVER_NAME_EXT);
+		}
+#endif
+
+		egl->exts.EXT_device_drm =
+			check_egl_ext(device_exts_str, "EGL_EXT_device_drm");
+		egl->exts.EXT_device_drm_render_node =
+			check_egl_ext(device_exts_str, "EGL_EXT_device_drm_render_node");
+	}
+
+	if (!check_egl_ext(display_exts_str, "EGL_KHR_no_config_context") &&
+			!check_egl_ext(display_exts_str, "EGL_MESA_configless_context")) {
+		wlr_log(WLR_ERROR, "EGL_KHR_no_config_context or "
+			"EGL_MESA_configless_context not supported");
+		return false;
+	}
+
+	if (!check_egl_ext(display_exts_str, "EGL_KHR_surfaceless_context")) {
+		wlr_log(WLR_ERROR, "EGL_KHR_surfaceless_context not supported");
+		return false;
+	}
+
+	egl->exts.IMG_context_priority =
+		check_egl_ext(display_exts_str, "EGL_IMG_context_priority");
+
+	wlr_log(WLR_INFO, "Using EGL %d.%d", (int)major, (int)minor);
+	wlr_log(WLR_INFO, "Supported EGL display extensions: %s", display_exts_str);
+	if (device_exts_str != NULL) {
+		wlr_log(WLR_INFO, "Supported EGL device extensions: %s", device_exts_str);
+	}
+	wlr_log(WLR_INFO, "EGL vendor: %s", eglQueryString(egl->display, EGL_VENDOR));
+	if (driver_name != NULL) {
+		wlr_log(WLR_INFO, "EGL driver name: %s", driver_name);
+	}
+
+	init_dmabuf_formats(egl);
+
+	return true;
+}
+
+static bool egl_init(struct wlr_egl *egl, EGLenum platform,
+		void *remote_display) {
+	EGLint display_attribs[3] = {0};
+	size_t display_attribs_len = 0;
+
+	if (egl->exts.KHR_display_reference) {
+		display_attribs[display_attribs_len++] = EGL_TRACK_REFERENCES_KHR;
+		display_attribs[display_attribs_len++] = EGL_TRUE;
+	}
+
+	display_attribs[display_attribs_len++] = EGL_NONE;
+	assert(display_attribs_len < sizeof(display_attribs) / sizeof(display_attribs[0]));
+
+	EGLDisplay display = egl->procs.eglGetPlatformDisplayEXT(platform,
+		remote_display, display_attribs);
+	if (display == EGL_NO_DISPLAY) {
+		wlr_log(WLR_ERROR, "Failed to create EGL display");
+		return false;
+	}
+
+	if (!egl_init_display(egl, display)) {
+		if (egl->exts.KHR_display_reference) {
+			eglTerminate(display);
+		}
+		return false;
+	}
+
+	size_t atti = 0;
+	EGLint attribs[7];
+	attribs[atti++] = EGL_CONTEXT_CLIENT_VERSION;
+	attribs[atti++] = 2;
+
+	// Request a high priority context if possible
+	// TODO: only do this if we're running as the DRM master
+	bool request_high_priority = egl->exts.IMG_context_priority;
+
+	// Try to reschedule all of our rendering to be completed first. If it
+	// fails, it will fallback to the default priority (MEDIUM).
+	if (request_high_priority) {
+		attribs[atti++] = EGL_CONTEXT_PRIORITY_LEVEL_IMG;
+		attribs[atti++] = EGL_CONTEXT_PRIORITY_HIGH_IMG;
+	}
+
+	if (egl->exts.EXT_create_context_robustness) {
+		attribs[atti++] = EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_EXT;
+		attribs[atti++] = EGL_LOSE_CONTEXT_ON_RESET_EXT;
+	}
+
+	attribs[atti++] = EGL_NONE;
+	assert(atti <= sizeof(attribs)/sizeof(attribs[0]));
+
+	egl->context = eglCreateContext(egl->display, EGL_NO_CONFIG_KHR,
+		EGL_NO_CONTEXT, attribs);
+	if (egl->context == EGL_NO_CONTEXT) {
+		wlr_log(WLR_ERROR, "Failed to create EGL context");
+		return false;
+	}
+
+	if (request_high_priority) {
+		EGLint priority = EGL_CONTEXT_PRIORITY_MEDIUM_IMG;
+		eglQueryContext(egl->display, egl->context,
+			EGL_CONTEXT_PRIORITY_LEVEL_IMG, &priority);
+		if (priority != EGL_CONTEXT_PRIORITY_HIGH_IMG) {
+			wlr_log(WLR_INFO, "Failed to obtain a high priority context");
+		} else {
+			wlr_log(WLR_DEBUG, "Obtained high priority context");
+		}
+	}
+
+	return true;
+}
+
+static bool device_has_name(const drmDevice *device, const char *name);
+
+static EGLDeviceEXT get_egl_device_from_drm_fd(struct wlr_egl *egl,
+		int drm_fd) {
+	if (egl->procs.eglQueryDevicesEXT == NULL) {
+		wlr_log(WLR_DEBUG, "EGL_EXT_device_enumeration not supported");
+		return EGL_NO_DEVICE_EXT;
+	} else if (!egl->exts.EXT_device_query) {
+		wlr_log(WLR_DEBUG, "EGL_EXT_device_query not supported");
+		return EGL_NO_DEVICE_EXT;
+	}
+
+	EGLint nb_devices = 0;
+	if (!egl->procs.eglQueryDevicesEXT(0, NULL, &nb_devices)) {
+		wlr_log(WLR_ERROR, "Failed to query EGL devices");
+		return EGL_NO_DEVICE_EXT;
+	}
+
+	EGLDeviceEXT *devices = calloc(nb_devices, sizeof(*devices));
+	if (devices == NULL) {
+		wlr_log_errno(WLR_ERROR, "Failed to allocate EGL device list");
+		return EGL_NO_DEVICE_EXT;
+	}
+
+	if (!egl->procs.eglQueryDevicesEXT(nb_devices, devices, &nb_devices)) {
+		wlr_log(WLR_ERROR, "Failed to query EGL devices");
+		return EGL_NO_DEVICE_EXT;
+	}
+
+	drmDevice *device = NULL;
+	int ret = drmGetDevice(drm_fd, &device);
+	if (ret < 0) {
+		wlr_log(WLR_ERROR, "Failed to get DRM device: %s", strerror(-ret));
+		return EGL_NO_DEVICE_EXT;
+	}
+
+	EGLDeviceEXT egl_device = NULL;
+	for (int i = 0; i < nb_devices; i++) {
+		const char *egl_device_name = egl->procs.eglQueryDeviceStringEXT(
+				devices[i], EGL_DRM_DEVICE_FILE_EXT);
+		if (egl_device_name == NULL) {
+			continue;
+		}
+
+		if (device_has_name(device, egl_device_name)) {
+			wlr_log(WLR_DEBUG, "Using EGL device %s", egl_device_name);
+			egl_device = devices[i];
+			break;
+		}
+	}
+
+	drmFreeDevice(&device);
+	free(devices);
+
+	return egl_device;
+}
+
+static int open_render_node(int drm_fd) {
+	char *render_name = drmGetRenderDeviceNameFromFd(drm_fd);
+	if (render_name == NULL) {
+		// This can happen on split render/display platforms, fallback to
+		// primary node
+		render_name = drmGetPrimaryDeviceNameFromFd(drm_fd);
+		if (render_name == NULL) {
+			wlr_log_errno(WLR_ERROR, "drmGetPrimaryDeviceNameFromFd failed");
+			return -1;
+		}
+		wlr_log(WLR_DEBUG, "DRM device '%s' has no render node, "
+			"falling back to primary node", render_name);
+	}
+
+	int render_fd = open(render_name, O_RDWR | O_CLOEXEC);
+	if (render_fd < 0) {
+		wlr_log_errno(WLR_ERROR, "Failed to open DRM node '%s'", render_name);
+	}
+	free(render_name);
+	return render_fd;
+}
+
+struct wlr_egl *wlr_egl_create_with_drm_fd(int drm_fd) {
+	struct wlr_egl *egl = egl_create();
+	if (egl == NULL) {
+		wlr_log(WLR_ERROR, "Failed to create EGL context");
+		return NULL;
+	}
+
+	if (egl->exts.EXT_platform_device) {
+		/*
+		 * Search for the EGL device matching the DRM fd using the
+		 * EXT_device_enumeration extension.
+		 */
+		EGLDeviceEXT egl_device = get_egl_device_from_drm_fd(egl, drm_fd);
+		if (egl_device != EGL_NO_DEVICE_EXT) {
+			if (egl_init(egl, EGL_PLATFORM_DEVICE_EXT, egl_device)) {
+				wlr_log(WLR_DEBUG, "Using EGL_PLATFORM_DEVICE_EXT");
+				return egl;
+			}
+			goto error;
+		}
+		/* Falls back on GBM in case the device was not found */
+	} else {
+		wlr_log(WLR_DEBUG, "EXT_platform_device not supported");
+	}
+
+	if (egl->exts.KHR_platform_gbm) {
+		int gbm_fd = open_render_node(drm_fd);
+		if (gbm_fd < 0) {
+			wlr_log(WLR_ERROR, "Failed to open DRM render node");
+			goto error;
+		}
+
+		egl->gbm_device = gbm_create_device(gbm_fd);
+		if (!egl->gbm_device) {
+			close(gbm_fd);
+			wlr_log(WLR_ERROR, "Failed to create GBM device");
+			goto error;
+		}
+
+		if (egl_init(egl, EGL_PLATFORM_GBM_KHR, egl->gbm_device)) {
+			wlr_log(WLR_DEBUG, "Using EGL_PLATFORM_GBM_KHR");
+			return egl;
+		}
+
+		gbm_device_destroy(egl->gbm_device);
+		close(gbm_fd);
+	} else {
+		wlr_log(WLR_DEBUG, "KHR_platform_gbm not supported");
+	}
+
+error:
+	wlr_log(WLR_ERROR, "Failed to initialize EGL context");
+	free(egl);
+	eglReleaseThread();
+	return NULL;
+}
+
+struct wlr_egl *wlr_egl_create_with_context(EGLDisplay display,
+		EGLContext context) {
+	EGLint client_type;
+	if (!eglQueryContext(display, context, EGL_CONTEXT_CLIENT_TYPE, &client_type) ||
+			client_type != EGL_OPENGL_ES_API) {
+		wlr_log(WLR_ERROR, "Unsupported EGL context client type (need OpenGL ES)");
+		return NULL;
+	}
+
+	EGLint client_version;
+	if (!eglQueryContext(display, context, EGL_CONTEXT_CLIENT_VERSION, &client_version) ||
+			client_version < 2) {
+		wlr_log(WLR_ERROR, "Unsupported EGL context client version (need OpenGL ES >= 2)");
+		return NULL;
+	}
+
+	struct wlr_egl *egl = egl_create();
+	if (egl == NULL) {
+		return NULL;
+	}
+
+	if (!egl_init_display(egl, display)) {
+		free(egl);
+		return NULL;
+	}
+
+	egl->context = context;
+
+	return egl;
+}
+
+void wlr_egl_destroy(struct wlr_egl *egl) {
+	if (egl == NULL) {
+		return;
+	}
+
+	wlr_drm_format_set_finish(&egl->dmabuf_render_formats);
+	wlr_drm_format_set_finish(&egl->dmabuf_texture_formats);
+
+	eglMakeCurrent(egl->display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+	eglDestroyContext(egl->display, egl->context);
+
+	if (egl->exts.KHR_display_reference) {
+		eglTerminate(egl->display);
+	}
+
+	eglReleaseThread();
+
+	if (egl->gbm_device) {
+		int gbm_fd = gbm_device_get_fd(egl->gbm_device);
+		gbm_device_destroy(egl->gbm_device);
+		close(gbm_fd);
+	}
+
+	free(egl);
+}
+
+EGLDisplay wlr_egl_get_display(struct wlr_egl *egl) {
+	return egl->display;
+}
+
+EGLContext wlr_egl_get_context(struct wlr_egl *egl) {
+	return egl->context;
+}
+
+bool wlr_egl_destroy_image(struct wlr_egl *egl, EGLImage image) {
+	if (!egl->exts.KHR_image_base) {
+		return false;
+	}
+	if (!image) {
+		return true;
+	}
+	return egl->procs.eglDestroyImageKHR(egl->display, image);
+}
+
+bool wlr_egl_make_current(struct wlr_egl *egl) {
+	if (!eglMakeCurrent(egl->display, EGL_NO_SURFACE, EGL_NO_SURFACE,
+			egl->context)) {
+		wlr_log(WLR_ERROR, "eglMakeCurrent failed");
+		return false;
+	}
+	return true;
+}
+
+bool wlr_egl_unset_current(struct wlr_egl *egl) {
+	if (!eglMakeCurrent(egl->display, EGL_NO_SURFACE, EGL_NO_SURFACE,
+			EGL_NO_CONTEXT)) {
+		wlr_log(WLR_ERROR, "eglMakeCurrent failed");
+		return false;
+	}
+	return true;
+}
+
+bool wlr_egl_is_current(struct wlr_egl *egl) {
+	return eglGetCurrentContext() == egl->context;
+}
+
+void wlr_egl_save_context(struct wlr_egl_context *context) {
+	context->display = eglGetCurrentDisplay();
+	context->context = eglGetCurrentContext();
+	context->draw_surface = eglGetCurrentSurface(EGL_DRAW);
+	context->read_surface = eglGetCurrentSurface(EGL_READ);
+}
+
+bool wlr_egl_restore_context(struct wlr_egl_context *context) {
+	// If the saved context is a null-context, we must use the current
+	// display instead of the saved display because eglMakeCurrent() can't
+	// handle EGL_NO_DISPLAY.
+	EGLDisplay display = context->display == EGL_NO_DISPLAY ?
+		eglGetCurrentDisplay() : context->display;
+
+	// If the current display is also EGL_NO_DISPLAY, we assume that there
+	// is currently no context set and no action needs to be taken to unset
+	// the context.
+	if (display == EGL_NO_DISPLAY) {
+		return true;
+	}
+
+	return eglMakeCurrent(display, context->draw_surface,
+			context->read_surface, context->context);
+}
+
+EGLImageKHR wlr_egl_create_image_from_dmabuf(struct wlr_egl *egl,
+		struct wlr_dmabuf_attributes *attributes, bool *external_only) {
+	if (!egl->exts.KHR_image_base || !egl->exts.EXT_image_dma_buf_import) {
+		wlr_log(WLR_ERROR, "dmabuf import extension not present");
+		return NULL;
+	}
+
+	if (attributes->modifier != DRM_FORMAT_MOD_INVALID &&
+			attributes->modifier != DRM_FORMAT_MOD_LINEAR &&
+			!egl->has_modifiers) {
+		wlr_log(WLR_ERROR, "EGL implementation doesn't support modifiers");
+		return NULL;
+	}
+
+	unsigned int atti = 0;
+	EGLint attribs[50];
+	attribs[atti++] = EGL_WIDTH;
+	attribs[atti++] = attributes->width;
+	attribs[atti++] = EGL_HEIGHT;
+	attribs[atti++] = attributes->height;
+	attribs[atti++] = EGL_LINUX_DRM_FOURCC_EXT;
+	attribs[atti++] = attributes->format;
+
+	struct {
+		EGLint fd;
+		EGLint offset;
+		EGLint pitch;
+		EGLint mod_lo;
+		EGLint mod_hi;
+	} attr_names[WLR_DMABUF_MAX_PLANES] = {
+		{
+			EGL_DMA_BUF_PLANE0_FD_EXT,
+			EGL_DMA_BUF_PLANE0_OFFSET_EXT,
+			EGL_DMA_BUF_PLANE0_PITCH_EXT,
+			EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT,
+			EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT
+		}, {
+			EGL_DMA_BUF_PLANE1_FD_EXT,
+			EGL_DMA_BUF_PLANE1_OFFSET_EXT,
+			EGL_DMA_BUF_PLANE1_PITCH_EXT,
+			EGL_DMA_BUF_PLANE1_MODIFIER_LO_EXT,
+			EGL_DMA_BUF_PLANE1_MODIFIER_HI_EXT
+		}, {
+			EGL_DMA_BUF_PLANE2_FD_EXT,
+			EGL_DMA_BUF_PLANE2_OFFSET_EXT,
+			EGL_DMA_BUF_PLANE2_PITCH_EXT,
+			EGL_DMA_BUF_PLANE2_MODIFIER_LO_EXT,
+			EGL_DMA_BUF_PLANE2_MODIFIER_HI_EXT
+		}, {
+			EGL_DMA_BUF_PLANE3_FD_EXT,
+			EGL_DMA_BUF_PLANE3_OFFSET_EXT,
+			EGL_DMA_BUF_PLANE3_PITCH_EXT,
+			EGL_DMA_BUF_PLANE3_MODIFIER_LO_EXT,
+			EGL_DMA_BUF_PLANE3_MODIFIER_HI_EXT
+		}
+	};
+
+	for (int i = 0; i < attributes->n_planes; i++) {
+		attribs[atti++] = attr_names[i].fd;
+		attribs[atti++] = attributes->fd[i];
+		attribs[atti++] = attr_names[i].offset;
+		attribs[atti++] = attributes->offset[i];
+		attribs[atti++] = attr_names[i].pitch;
+		attribs[atti++] = attributes->stride[i];
+		if (egl->has_modifiers &&
+				attributes->modifier != DRM_FORMAT_MOD_INVALID) {
+			attribs[atti++] = attr_names[i].mod_lo;
+			attribs[atti++] = attributes->modifier & 0xFFFFFFFF;
+			attribs[atti++] = attr_names[i].mod_hi;
+			attribs[atti++] = attributes->modifier >> 32;
+		}
+	}
+
+	// Our clients don't expect our usage to trash the buffer contents
+	attribs[atti++] = EGL_IMAGE_PRESERVED_KHR;
+	attribs[atti++] = EGL_TRUE;
+
+	attribs[atti++] = EGL_NONE;
+	assert(atti < sizeof(attribs)/sizeof(attribs[0]));
+
+	EGLImageKHR image = egl->procs.eglCreateImageKHR(egl->display, EGL_NO_CONTEXT,
+		EGL_LINUX_DMA_BUF_EXT, NULL, attribs);
+	if (image == EGL_NO_IMAGE_KHR) {
+		wlr_log(WLR_ERROR, "eglCreateImageKHR failed");
+		return EGL_NO_IMAGE_KHR;
+	}
+
+	*external_only = !wlr_drm_format_set_has(&egl->dmabuf_render_formats,
+		attributes->format, attributes->modifier);
+	return image;
+}
+
+static int get_egl_dmabuf_formats(struct wlr_egl *egl, EGLint **formats) {
+	if (!egl->exts.EXT_image_dma_buf_import) {
+		wlr_log(WLR_DEBUG, "DMA-BUF import extension not present");
+		return -1;
+	}
+
+	// when we only have the image_dmabuf_import extension we can't query
+	// which formats are supported. These two are on almost always
+	// supported; it's the intended way to just try to create buffers.
+	// Just a guess but better than not supporting dmabufs at all,
+	// given that the modifiers extension isn't supported everywhere.
+	if (!egl->exts.EXT_image_dma_buf_import_modifiers) {
+		static const EGLint fallback_formats[] = {
+			DRM_FORMAT_ARGB8888,
+			DRM_FORMAT_XRGB8888,
+		};
+		int num = sizeof(fallback_formats) / sizeof(fallback_formats[0]);
+
+		*formats = calloc(num, sizeof(**formats));
+		if (!*formats) {
+			wlr_log_errno(WLR_ERROR, "Allocation failed");
+			return -1;
+		}
+
+		memcpy(*formats, fallback_formats, num * sizeof(**formats));
+		return num;
+	}
+
+	EGLint num;
+	if (!egl->procs.eglQueryDmaBufFormatsEXT(egl->display, 0, NULL, &num)) {
+		wlr_log(WLR_ERROR, "Failed to query number of dmabuf formats");
+		return -1;
+	}
+
+	*formats = calloc(num, sizeof(**formats));
+	if (*formats == NULL) {
+		wlr_log(WLR_ERROR, "Allocation failed: %s", strerror(errno));
+		return -1;
+	}
+
+	if (!egl->procs.eglQueryDmaBufFormatsEXT(egl->display, num, *formats, &num)) {
+		wlr_log(WLR_ERROR, "Failed to query dmabuf format");
+		free(*formats);
+		return -1;
+	}
+	return num;
+}
+
+static int get_egl_dmabuf_modifiers(struct wlr_egl *egl, EGLint format,
+		uint64_t **modifiers, EGLBoolean **external_only) {
+	*modifiers = NULL;
+	*external_only = NULL;
+
+	if (!egl->exts.EXT_image_dma_buf_import) {
+		wlr_log(WLR_DEBUG, "DMA-BUF extension not present");
+		return -1;
+	}
+	if (!egl->exts.EXT_image_dma_buf_import_modifiers) {
+		return 0;
+	}
+
+	EGLint num;
+	if (!egl->procs.eglQueryDmaBufModifiersEXT(egl->display, format, 0,
+			NULL, NULL, &num)) {
+		wlr_log(WLR_ERROR, "Failed to query dmabuf number of modifiers");
+		return -1;
+	}
+	if (num == 0) {
+		return 0;
+	}
+
+	*modifiers = calloc(num, sizeof(**modifiers));
+	if (*modifiers == NULL) {
+		wlr_log_errno(WLR_ERROR, "Allocation failed");
+		return -1;
+	}
+	*external_only = calloc(num, sizeof(**external_only));
+	if (*external_only == NULL) {
+		wlr_log_errno(WLR_ERROR, "Allocation failed");
+		free(*modifiers);
+		*modifiers = NULL;
+		return -1;
+	}
+
+	if (!egl->procs.eglQueryDmaBufModifiersEXT(egl->display, format, num,
+			*modifiers, *external_only, &num)) {
+		wlr_log(WLR_ERROR, "Failed to query dmabuf modifiers");
+		free(*modifiers);
+		free(*external_only);
+		return -1;
+	}
+	return num;
+}
+
+const struct wlr_drm_format_set *wlr_egl_get_dmabuf_texture_formats(
+		struct wlr_egl *egl) {
+	return &egl->dmabuf_texture_formats;
+}
+
+const struct wlr_drm_format_set *wlr_egl_get_dmabuf_render_formats(
+		struct wlr_egl *egl) {
+	return &egl->dmabuf_render_formats;
+}
+
+static bool device_has_name(const drmDevice *device, const char *name) {
+	for (size_t i = 0; i < DRM_NODE_MAX; i++) {
+		if (!(device->available_nodes & (1 << i))) {
+			continue;
+		}
+		if (strcmp(device->nodes[i], name) == 0) {
+			return true;
+		}
+	}
+	return false;
+}
+
+static char *get_render_name(const char *name) {
+	uint32_t flags = 0;
+	int devices_len = drmGetDevices2(flags, NULL, 0);
+	if (devices_len < 0) {
+		wlr_log(WLR_ERROR, "drmGetDevices2 failed: %s", strerror(-devices_len));
+		return NULL;
+	}
+	drmDevice **devices = calloc(devices_len, sizeof(*devices));
+	if (devices == NULL) {
+		wlr_log_errno(WLR_ERROR, "Allocation failed");
+		return NULL;
+	}
+	devices_len = drmGetDevices2(flags, devices, devices_len);
+	if (devices_len < 0) {
+		free(devices);
+		wlr_log(WLR_ERROR, "drmGetDevices2 failed: %s", strerror(-devices_len));
+		return NULL;
+	}
+
+	const drmDevice *match = NULL;
+	for (int i = 0; i < devices_len; i++) {
+		if (device_has_name(devices[i], name)) {
+			match = devices[i];
+			break;
+		}
+	}
+
+	char *render_name = NULL;
+	if (match == NULL) {
+		wlr_log(WLR_ERROR, "Cannot find DRM device %s", name);
+	} else if (!(match->available_nodes & (1 << DRM_NODE_RENDER))) {
+		// Likely a split display/render setup. Pick the primary node and hope
+		// Mesa will open the right render node under-the-hood.
+		wlr_log(WLR_DEBUG, "DRM device %s has no render node, "
+			"falling back to primary node", name);
+		assert(match->available_nodes & (1 << DRM_NODE_PRIMARY));
+		render_name = strdup(match->nodes[DRM_NODE_PRIMARY]);
+	} else {
+		render_name = strdup(match->nodes[DRM_NODE_RENDER]);
+	}
+
+	for (int i = 0; i < devices_len; i++) {
+		drmFreeDevice(&devices[i]);
+	}
+	free(devices);
+
+	return render_name;
+}
+
+static int dup_egl_device_drm_fd(struct wlr_egl *egl) {
+	if (egl->device == EGL_NO_DEVICE_EXT || (!egl->exts.EXT_device_drm &&
+			!egl->exts.EXT_device_drm_render_node)) {
+		return -1;
+	}
+
+	char *render_name = NULL;
+#ifdef EGL_EXT_device_drm_render_node
+	if (egl->exts.EXT_device_drm_render_node) {
+		const char *name = egl->procs.eglQueryDeviceStringEXT(egl->device,
+			EGL_DRM_RENDER_NODE_FILE_EXT);
+		if (name == NULL) {
+			wlr_log(WLR_DEBUG, "EGL device has no render node");
+			return -1;
+		}
+		render_name = strdup(name);
+	}
+#endif
+
+	if (render_name == NULL) {
+		const char *primary_name = egl->procs.eglQueryDeviceStringEXT(egl->device,
+			EGL_DRM_DEVICE_FILE_EXT);
+		if (primary_name == NULL) {
+			wlr_log(WLR_ERROR,
+				"eglQueryDeviceStringEXT(EGL_DRM_DEVICE_FILE_EXT) failed");
+			return -1;
+		}
+
+		render_name = get_render_name(primary_name);
+		if (render_name == NULL) {
+			wlr_log(WLR_ERROR, "Can't find render node name for device %s",
+				primary_name);
+			return -1;
+		}
+	}
+
+	int render_fd = open(render_name, O_RDWR | O_NONBLOCK | O_CLOEXEC);
+	if (render_fd < 0) {
+		wlr_log_errno(WLR_ERROR, "Failed to open DRM render node %s",
+			render_name);
+		free(render_name);
+		return -1;
+	}
+	free(render_name);
+
+	return render_fd;
+}
+
+int wlr_egl_dup_drm_fd(struct wlr_egl *egl) {
+	int fd = dup_egl_device_drm_fd(egl);
+	if (fd >= 0) {
+		return fd;
+	}
+
+	// Fallback to GBM's FD if we can't use EGLDevice
+	if (egl->gbm_device == NULL) {
+		return -1;
+	}
+
+	fd = fcntl(gbm_device_get_fd(egl->gbm_device), F_DUPFD_CLOEXEC, 0);
+	if (fd < 0) {
+		wlr_log_errno(WLR_ERROR, "Failed to dup GBM FD");
+	}
+	return fd;
+}
diff --git a/render/fx_renderer/fx_framebuffer.c b/render/fx_renderer/fx_framebuffer.c
new file mode 100644
index 0000000..fea101b
--- /dev/null
+++ b/render/fx_renderer/fx_framebuffer.c
@@ -0,0 +1,137 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <wlr/interfaces/wlr_buffer.h>
+#include <wlr/render/allocator.h>
+#include <wlr/render/interface.h>
+#include <wlr/render/swapchain.h>
+#include <wlr/util/log.h>
+
+#include "render/egl.h"
+#include "render/fx_renderer/fx_renderer.h"
+
+static void handle_buffer_destroy(struct wlr_addon *addon) {
+	struct fx_framebuffer *buffer =
+		wl_container_of(addon, buffer, addon);
+	fx_framebuffer_destroy(buffer);
+}
+
+static const struct wlr_addon_interface buffer_addon_impl = {
+	.name = "fx_framebuffer",
+	.destroy = handle_buffer_destroy,
+};
+
+struct fx_framebuffer *fx_framebuffer_get_or_create(struct fx_renderer *renderer,
+		struct wlr_buffer *wlr_buffer) {
+	struct wlr_addon *addon =
+		wlr_addon_find(&wlr_buffer->addons, renderer, &buffer_addon_impl);
+	if (addon) {
+		struct fx_framebuffer *buffer = wl_container_of(addon, buffer, addon);
+		return buffer;
+	}
+
+	struct fx_framebuffer *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;
+	}
+
+	bool external_only;
+	buffer->image = wlr_egl_create_image_from_dmabuf(renderer->egl,
+		&dmabuf, &external_only);
+	if (buffer->image == EGL_NO_IMAGE_KHR) {
+		goto error_buffer;
+	}
+
+	push_fx_debug(renderer);
+
+	glGenRenderbuffers(1, &buffer->rbo);
+	glBindRenderbuffer(GL_RENDERBUFFER, buffer->rbo);
+	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);
+	if (fb_status != GL_FRAMEBUFFER_COMPLETE) {
+		wlr_log(WLR_ERROR, "Failed to create FBO");
+		glBindFramebuffer(GL_FRAMEBUFFER, 0);
+		goto error_image;
+	}
+
+	// Init stencil buffer
+	glGenRenderbuffers(1, &buffer->sb);
+	glBindRenderbuffer(GL_RENDERBUFFER, buffer->sb);
+	glRenderbufferStorage(GL_RENDERBUFFER, GL_STENCIL_INDEX8,
+			wlr_buffer->width, wlr_buffer->height);
+	glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT,
+			GL_RENDERBUFFER, buffer->sb);
+	fb_status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
+	if (fb_status != GL_FRAMEBUFFER_COMPLETE) {
+		wlr_log(WLR_ERROR,
+				"Stencil buffer incomplete, couldn't create! (FB status: %i)",
+				fb_status);
+		glBindFramebuffer(GL_FRAMEBUFFER, 0);
+		goto error_stencil;
+	}
+
+	glBindFramebuffer(GL_FRAMEBUFFER, 0);
+
+	pop_fx_debug(renderer);
+
+	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_stencil:
+	glDeleteRenderbuffers(1, &buffer->sb);
+error_image:
+	wlr_egl_destroy_image(renderer->egl, buffer->image);
+error_buffer:
+	free(buffer);
+	return NULL;
+}
+
+void fx_framebuffer_bind(struct fx_framebuffer *fx_buffer) {
+	glBindFramebuffer(GL_FRAMEBUFFER, fx_buffer->fbo);
+}
+
+void fx_framebuffer_bind_wlr_fbo(struct fx_renderer *renderer) {
+	glBindFramebuffer(GL_FRAMEBUFFER, renderer->current_buffer->fbo);
+}
+
+void fx_framebuffer_destroy(struct fx_framebuffer *fx_buffer) {
+	// Release the framebuffer
+	wl_list_remove(&fx_buffer->link);
+	wlr_addon_finish(&fx_buffer->addon);
+
+	struct wlr_egl_context prev_ctx;
+	wlr_egl_save_context(&prev_ctx);
+	wlr_egl_make_current(fx_buffer->renderer->egl);
+
+	glDeleteFramebuffers(1, &fx_buffer->fbo);
+	fx_buffer->fbo = -1;
+	glDeleteRenderbuffers(1, &fx_buffer->rbo);
+	fx_buffer->rbo = -1;
+
+	wlr_egl_destroy_image(fx_buffer->renderer->egl, fx_buffer->image);
+
+	wlr_egl_restore_context(&prev_ctx);
+
+	free(fx_buffer);
+}
diff --git a/render/fx_renderer/fx_pass.c b/render/fx_renderer/fx_pass.c
new file mode 100644
index 0000000..9a8c90c
--- /dev/null
+++ b/render/fx_renderer/fx_pass.c
@@ -0,0 +1,509 @@
+#define _POSIX_C_SOURCE 199309L
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <pixman.h>
+#include <time.h>
+#include <wlr/types/wlr_matrix.h>
+#include <wlr/util/log.h>
+
+#include "render/egl.h"
+#include "render/fx_renderer/fx_renderer.h"
+#include "render/fx_renderer/matrix.h"
+#include "render/pass.h"
+#include "types/fx/shadow_data.h"
+
+#define MAX_QUADS 86 // 4kb
+
+struct fx_render_texture_options fx_render_texture_options_default(
+		const struct wlr_render_texture_options *base) {
+	struct fx_render_texture_options options = {
+		.corner_radius = 0,
+		.scale = 1.0f,
+		.clip_box = NULL,
+	};
+	memcpy(&options.base, base, sizeof(*base));
+	return options;
+}
+
+struct fx_render_rect_options fx_render_rect_options_default(
+		const struct wlr_render_rect_options *base) {
+	struct fx_render_rect_options options = {
+		.scale = 1.0f,
+	};
+	memcpy(&options.base, base, sizeof(*base));
+	return options;
+}
+
+///
+/// Base Wlroots pass functions
+///
+
+static const struct wlr_render_pass_impl render_pass_impl;
+
+static struct fx_gles_render_pass *get_render_pass(struct wlr_render_pass *wlr_pass) {
+	assert(wlr_pass->impl == &render_pass_impl);
+	struct fx_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 fx_gles_render_pass *pass = get_render_pass(wlr_pass);
+	struct fx_renderer *renderer = pass->buffer->renderer;
+	struct fx_render_timer *timer = pass->timer;
+
+	push_fx_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);
+	}
+
+	glFlush();
+	glBindFramebuffer(GL_FRAMEBUFFER, 0);
+
+	pop_fx_debug(renderer);
+
+	wlr_buffer_unlock(pass->buffer->buffer);
+	free(pass);
+
+	return true;
+}
+
+static void render_pass_add_texture(struct wlr_render_pass *wlr_pass,
+		const struct wlr_render_texture_options *options) {
+	struct fx_gles_render_pass *pass = get_render_pass(wlr_pass);
+	const struct fx_render_texture_options fx_options =
+		fx_render_texture_options_default(options);
+	// Re-use fx function but with default options
+	fx_render_pass_add_texture(pass, &fx_options);
+}
+
+static void render_pass_add_rect(struct wlr_render_pass *wlr_pass,
+		const struct wlr_render_rect_options *options) {
+	struct fx_gles_render_pass *pass = get_render_pass(wlr_pass);
+	const struct fx_render_rect_options fx_options =
+		fx_render_rect_options_default(options);
+	// Re-use fx function but with default options
+	fx_render_pass_add_rect(pass, &fx_options);
+}
+
+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,
+};
+
+///
+/// FX pass functions
+///
+
+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;
+	}
+}
+
+// Initialize the stenciling work
+static void stencil_mask_init(void) {
+	glClearStencil(0);
+	glClear(GL_STENCIL_BUFFER_BIT);
+	glEnable(GL_STENCIL_TEST);
+
+	glStencilFunc(GL_ALWAYS, 1, 0xFF);
+	glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
+	// Disable writing to color buffer
+	glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
+}
+
+// Close the mask
+static void stencil_mask_close(bool draw_inside_mask) {
+	// Reenable writing to color buffer
+	glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
+	if (draw_inside_mask) {
+		glStencilFunc(GL_EQUAL, 1, 0xFF);
+		glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
+		return;
+	}
+	glStencilFunc(GL_NOTEQUAL, 1, 0xFF);
+	glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
+}
+
+// Finish stenciling and clear the buffer
+static void stencil_mask_fini(void) {
+	glClearStencil(0);
+	glClear(GL_STENCIL_BUFFER_BIT);
+	glDisable(GL_STENCIL_TEST);
+}
+
+// make sure the texture source box does not try and sample outside of the
+// texture
+static void check_tex_src_box(const struct wlr_render_texture_options *options) {
+	if (!wlr_fbox_empty(&options->src_box)) {
+		const struct wlr_fbox *box = &options->src_box;
+		assert(box->x >= 0 && box->y >= 0 &&
+			box->x + box->width <= options->texture->width &&
+			box->y + box->height <= options->texture->height);
+	}
+}
+
+void fx_render_pass_add_texture(struct fx_gles_render_pass *pass,
+		const struct fx_render_texture_options *fx_options) {
+	const struct wlr_render_texture_options *options = &fx_options->base;
+
+	check_tex_src_box(options);
+
+	struct fx_renderer *renderer = pass->buffer->renderer;
+	struct fx_texture *texture = fx_get_texture(options->texture);
+
+	struct 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);
+
+	struct wlr_box *clip_box = &dst_box;
+	if (!wlr_box_empty(fx_options->clip_box)) {
+		clip_box = fx_options->clip_box;
+	}
+
+	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_fx_debug(renderer);
+	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);
+	glUniform2f(shader->size, clip_box->width, clip_box->height);
+	glUniform2f(shader->position, clip_box->x, clip_box->y);
+	glUniform1f(shader->radius, fx_options->corner_radius);
+
+	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_fx_debug(renderer);
+}
+
+void fx_render_pass_add_rect(struct fx_gles_render_pass *pass,
+		const struct fx_render_rect_options *fx_options) {
+	const struct wlr_render_rect_options *options = &fx_options->base;
+
+	struct fx_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_fx_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_fx_debug(renderer);
+}
+
+void fx_render_pass_add_stencil_mask(struct fx_gles_render_pass *pass,
+		const struct fx_render_rect_options *fx_options, int corner_radius) {
+	const struct wlr_render_rect_options *options = &fx_options->base;
+
+	struct fx_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);
+	assert(box.width > 0 && box.height > 0);
+
+	push_fx_debug(renderer);
+	setup_blending(WLR_RENDER_BLEND_MODE_PREMULTIPLIED);
+
+	glUseProgram(renderer->shaders.stencil_mask.program);
+
+	set_proj_matrix(renderer->shaders.stencil_mask.proj, pass->projection_matrix, &box);
+	glUniform4f(renderer->shaders.stencil_mask.color, color->r, color->g, color->b, color->a);
+	glUniform2f(renderer->shaders.stencil_mask.half_size, box.width * 0.5, box.height * 0.5);
+	glUniform2f(renderer->shaders.stencil_mask.position, box.x, box.y);
+	glUniform1f(renderer->shaders.stencil_mask.radius, corner_radius);
+
+	render(&box, options->clip, renderer->shaders.stencil_mask.pos_attrib);
+
+	pop_fx_debug(renderer);
+}
+
+void fx_render_pass_add_box_shadow(struct fx_gles_render_pass *pass,
+		const struct fx_render_rect_options *fx_options,
+		int corner_radius, struct shadow_data *shadow_data) {
+	const struct wlr_render_rect_options *options = &fx_options->base;
+
+	struct fx_renderer *renderer = pass->buffer->renderer;
+
+	const struct wlr_render_color *color = &shadow_data->color;
+	struct wlr_box box;
+	wlr_render_rect_options_get_box(options, pass->buffer->buffer, &box);
+	assert(box.width > 0 && box.height > 0);
+	struct wlr_box surface_box = box;
+	float blur_sigma = shadow_data->blur_sigma * fx_options->scale;
+
+	// Extend the size of the box
+	box.x -= blur_sigma;
+	box.y -= blur_sigma;
+	box.width += blur_sigma * 2;
+	box.height += blur_sigma * 2;
+
+	pixman_region32_t render_region;
+	pixman_region32_init(&render_region);
+
+	pixman_region32_t inner_region;
+	pixman_region32_init(&inner_region);
+	pixman_region32_union_rect(&inner_region, &inner_region,
+			surface_box.x + corner_radius * 0.5,
+			surface_box.y + corner_radius * 0.5,
+			surface_box.width - corner_radius,
+			surface_box.height - corner_radius);
+	pixman_region32_subtract(&render_region, options->clip, &inner_region);
+	pixman_region32_fini(&inner_region);
+
+	push_fx_debug(renderer);
+
+	// Init stencil work
+	stencil_mask_init();
+	// Draw the rounded rect as a mask
+	fx_render_pass_add_stencil_mask(pass, fx_options, corner_radius);
+	stencil_mask_close(false);
+
+	// blending will practically always be needed (unless we have a madman
+	// who uses opaque shadows with zero sigma), so just enable it
+	setup_blending(WLR_RENDER_BLEND_MODE_PREMULTIPLIED);
+	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+	glUseProgram(renderer->shaders.box_shadow.program);
+
+	set_proj_matrix(renderer->shaders.box_shadow.proj, pass->projection_matrix, &box);
+	glUniform4f(renderer->shaders.box_shadow.color, color->r, color->g, color->b, color->a);
+	glUniform1f(renderer->shaders.box_shadow.blur_sigma, blur_sigma);
+	glUniform1f(renderer->shaders.box_shadow.corner_radius, corner_radius);
+	glUniform2f(renderer->shaders.box_shadow.size, box.width, box.height);
+	glUniform2f(renderer->shaders.box_shadow.position, box.x, box.y);
+
+	render(&box, &render_region, renderer->shaders.box_shadow.pos_attrib);
+	pixman_region32_fini(&render_region);
+
+	glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
+
+	stencil_mask_fini();
+
+	pop_fx_debug(renderer);
+}
+
+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>";
+	}
+}
+
+static struct fx_gles_render_pass *begin_buffer_pass(struct fx_framebuffer *buffer,
+		struct fx_render_timer *timer) {
+	struct fx_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;
+		}
+	}
+
+	struct fx_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;
+
+	matrix_projection(pass->projection_matrix, wlr_buffer->width, wlr_buffer->height,
+		WL_OUTPUT_TRANSFORM_FLIPPED_180);
+
+	push_fx_debug(renderer);
+	glBindFramebuffer(GL_FRAMEBUFFER, buffer->fbo);
+
+	glViewport(0, 0, wlr_buffer->width, wlr_buffer->height);
+	glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
+	glDisable(GL_SCISSOR_TEST);
+	pop_fx_debug(renderer);
+
+	return pass;
+}
+
+struct fx_gles_render_pass *fx_renderer_begin_buffer_pass(struct wlr_renderer *wlr_renderer,
+		struct wlr_buffer *wlr_buffer, const struct wlr_buffer_pass_options *options) {
+	struct fx_renderer *renderer = fx_get_renderer(wlr_renderer);
+	if (!wlr_egl_make_current(renderer->egl)) {
+		return NULL;
+	}
+
+	struct fx_render_timer *timer = NULL;
+	if (options->timer) {
+		timer = fx_get_render_timer(options->timer);
+		clock_gettime(CLOCK_MONOTONIC, &timer->cpu_start);
+	}
+
+	struct fx_framebuffer *buffer = fx_framebuffer_get_or_create(renderer, wlr_buffer);
+	if (!buffer) {
+		return NULL;
+	}
+
+	struct fx_gles_render_pass *pass = begin_buffer_pass(buffer, timer);
+	if (!pass) {
+		return NULL;
+	}
+	return pass;
+}
diff --git a/render/fx_renderer/fx_renderer.c b/render/fx_renderer/fx_renderer.c
index 730e314..da9437c 100644
--- a/render/fx_renderer/fx_renderer.c
+++ b/render/fx_renderer/fx_renderer.c
@@ -3,27 +3,28 @@
 	https://gitlab.freedesktop.org/wlroots/wlroots/-/tree/master/render/gles2
 */
 
+#define _POSIX_C_SOURCE 199309L
 #include <assert.h>
+#include <drm_fourcc.h>
 #include <GLES2/gl2.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
 #include <wlr/backend.h>
+#include <wlr/render/allocator.h>
 #include <wlr/render/egl.h>
-#include <wlr/render/gles2.h>
+#include <wlr/render/interface.h>
 #include <wlr/types/wlr_matrix.h>
 #include <wlr/util/box.h>
 #include <wlr/util/log.h>
 
+#include "render/egl.h"
 #include "render/fx_renderer/fx_renderer.h"
-#include "render/fx_renderer/fx_stencilbuffer.h"
 #include "render/fx_renderer/matrix.h"
-
-// shaders
-#include "common_vert_src.h"
-#include "quad_frag_src.h"
-#include "tex_frag_src.h"
-#include "stencil_mask_frag_src.h"
-#include "box_shadow_frag_src.h"
+#include "render/fx_renderer/util.h"
+#include "render/pixel_format.h"
+#include "util/time.h"
 
 static const GLfloat verts[] = {
 	1, 0, // top right
@@ -32,372 +33,179 @@ static const GLfloat verts[] = {
 	0, 1, // bottom left
 };
 
-static GLuint compile_shader(GLuint type, const GLchar *src) {
-	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;
-	}
+static const struct wlr_renderer_impl renderer_impl;
+static const struct wlr_render_timer_impl render_timer_impl;
 
-	return shader;
+bool wlr_renderer_is_fx(struct wlr_renderer *wlr_renderer) {
+	return wlr_renderer->impl == &renderer_impl;
 }
 
-static GLuint link_program(const GLchar *frag_src) {
-	const GLchar *vert_src = common_vert_src;
-	GLuint vert = compile_shader(GL_VERTEX_SHADER, vert_src);
-	if (!vert) {
-		goto error;
-	}
-
-	GLuint frag = compile_shader(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;
-	}
-
-	return prog;
-
-error:
-	return 0;
+struct fx_renderer *fx_get_renderer(
+		struct wlr_renderer *wlr_renderer) {
+	assert(wlr_renderer_is_fx(wlr_renderer));
+	struct fx_renderer *renderer = wl_container_of(wlr_renderer, renderer, wlr_renderer);
+	return renderer;
 }
 
-static bool link_quad_program(struct quad_shader *shader) {
-	GLuint prog;
-	shader->program = prog = link_program(quad_frag_src);
-	if (!shader->program) {
-		return false;
-	}
-
-	shader->proj = glGetUniformLocation(prog, "proj");
-	shader->color = glGetUniformLocation(prog, "color");
-	shader->pos_attrib = glGetAttribLocation(prog, "pos");
+static struct fx_renderer *fx_get_renderer_in_context(
+		struct wlr_renderer *wlr_renderer) {
+	struct fx_renderer *renderer = fx_get_renderer(wlr_renderer);
+	assert(wlr_egl_is_current(renderer->egl));
+	assert(renderer->current_buffer != NULL);
+	return renderer;
+}
 
-	return true;
+bool wlr_render_timer_is_fx(struct wlr_render_timer *timer) {
+	return timer->impl == &render_timer_impl;
 }
 
-static bool link_tex_program(struct tex_shader *shader,
-		enum fx_tex_shader_source source) {
-	GLchar frag_src[2048];
-	snprintf(frag_src, sizeof(frag_src),
-		"#define SOURCE %d\n%s", source, tex_frag_src);
+struct fx_render_timer *fx_get_render_timer(struct wlr_render_timer *wlr_timer) {
+	assert(wlr_render_timer_is_fx(wlr_timer));
+	struct fx_render_timer *timer = wl_container_of(wlr_timer, timer, base);
+	return timer;
+}
 
-	GLuint prog;
-	shader->program = prog = link_program(frag_src);
-	if (!shader->program) {
-		return false;
-	}
+static bool fx_bind_main_buffer(struct wlr_renderer *wlr_renderer,
+		struct wlr_buffer *wlr_buffer) {
+	struct fx_renderer *renderer = fx_get_renderer(wlr_renderer);
 
-	shader->proj = glGetUniformLocation(prog, "proj");
-	shader->tex = glGetUniformLocation(prog, "tex");
-	shader->alpha = glGetUniformLocation(prog, "alpha");
-	shader->pos_attrib = glGetAttribLocation(prog, "pos");
-	shader->tex_attrib = glGetAttribLocation(prog, "texcoord");
-	shader->size = glGetUniformLocation(prog, "size");
-	shader->position = glGetUniformLocation(prog, "position");
-	shader->radius = glGetUniformLocation(prog, "radius");
+	if (renderer->current_buffer != NULL) {
+		assert(wlr_egl_is_current(renderer->egl));
 
-	return true;
-}
+		push_fx_debug(renderer);
+		glFlush();
+		glBindFramebuffer(GL_FRAMEBUFFER, 0);
+		pop_fx_debug(renderer);
 
-static bool link_stencil_mask_program(struct stencil_mask_shader *shader) {
-	GLuint prog;
-	shader->program = prog = link_program(stencil_mask_frag_src);
-	if (!shader->program) {
-		return false;
+		wlr_buffer_unlock(renderer->current_buffer->buffer);
+		renderer->current_buffer = NULL;
 	}
 
-	shader->proj = glGetUniformLocation(prog, "proj");
-	shader->color = glGetUniformLocation(prog, "color");
-	shader->pos_attrib = glGetAttribLocation(prog, "pos");
-	shader->position = glGetUniformLocation(prog, "position");
-	shader->half_size = glGetUniformLocation(prog, "half_size");
-	shader->radius = glGetUniformLocation(prog, "radius");
+	if (wlr_buffer == NULL) {
+		wlr_egl_unset_current(renderer->egl);
+		return true;
+	}
 
-	return true;
-}
+	wlr_egl_make_current(renderer->egl);
 
-static bool link_box_shadow_program(struct box_shadow_shader *shader) {
-	GLuint prog;
-	shader->program = prog = link_program(box_shadow_frag_src);
-	if (!shader->program) {
+	struct fx_framebuffer *buffer = fx_framebuffer_get_or_create(renderer, wlr_buffer);
+	if (buffer == NULL) {
 		return false;
 	}
-	shader->proj = glGetUniformLocation(prog, "proj");
-	shader->color = glGetUniformLocation(prog, "color");
-	shader->pos_attrib = glGetAttribLocation(prog, "pos");
-	shader->position = glGetUniformLocation(prog, "position");
-	shader->size = glGetUniformLocation(prog, "size");
-	shader->blur_sigma = glGetUniformLocation(prog, "blur_sigma");
-	shader->corner_radius = glGetUniformLocation(prog, "corner_radius");
 
-	return true;
-}
+	wlr_buffer_lock(wlr_buffer);
+	renderer->current_buffer = buffer;
 
-static bool check_gl_ext(const char *exts, const char *ext) {
-	size_t extlen = strlen(ext);
-	const char *end = exts + strlen(exts);
+	push_fx_debug(renderer);
+	glBindFramebuffer(GL_FRAMEBUFFER, renderer->current_buffer->fbo);
+	pop_fx_debug(renderer);
 
-	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;
+	return true;
 }
 
-static void load_gl_proc(void *proc_ptr, const char *name) {
-	void *proc = (void *)eglGetProcAddress(name);
-	if (proc == NULL) {
-		wlr_log(WLR_ERROR, "GLES2 RENDERER: eglGetProcAddress(%s) failed", name);
-		abort();
+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>";
 	}
-	*(void **)proc_ptr = proc;
 }
 
-static void fx_renderer_handle_destroy(struct wlr_addon *addon) {
+static bool fx_renderer_begin(struct wlr_renderer *wlr_renderer, uint32_t width,
+		uint32_t height) {
 	struct fx_renderer *renderer =
-		wl_container_of(addon, renderer, addon);
-	fx_renderer_fini(renderer);
-	free(renderer);
-}
-static const struct wlr_addon_interface fx_renderer_addon_impl = {
-	.name = "fx_renderer",
-	.destroy = fx_renderer_handle_destroy,
-};
-
-void fx_renderer_init_addon(struct wlr_egl *egl, struct wlr_addon_set *addons,
-		const void * owner) {
-	struct fx_renderer *renderer = fx_renderer_create(egl);
-	if (!renderer) {
-		wlr_log(WLR_ERROR, "Failed to create fx_renderer");
-		abort();
-	}
-	wlr_addon_init(&renderer->addon, addons, owner, &fx_renderer_addon_impl);
-}
-
-struct fx_renderer *fx_renderer_addon_find(struct wlr_addon_set *addons,
-		const void * owner) {
-	struct wlr_addon *addon =
-		wlr_addon_find(addons, owner, &fx_renderer_addon_impl);
-	if (addon == NULL) {
-		return NULL;
-	}
-	struct fx_renderer *renderer = wl_container_of(addon, renderer, addon);
-	return renderer;
-}
-
-struct fx_renderer *fx_renderer_create(struct wlr_egl *egl) {
-	struct fx_renderer *renderer = calloc(1, sizeof(struct fx_renderer));
-	if (renderer == NULL) {
-		return NULL;
-	}
-
-	if (!eglMakeCurrent(wlr_egl_get_display(egl), EGL_NO_SURFACE, EGL_NO_SURFACE,
-			wlr_egl_get_context(egl))) {
-		wlr_log(WLR_ERROR, "GLES2 RENDERER: Could not make EGL current");
-		return NULL;
-	}
-
-	renderer->stencil_buffer = fx_stencilbuffer_create();
-
-	// get extensions
-	const char *exts_str = (const char *)glGetString(GL_EXTENSIONS);
-	if (exts_str == NULL) {
-		wlr_log(WLR_ERROR, "GLES2 RENDERER: Failed to get GL_EXTENSIONS");
-		return NULL;
-	}
-
-	wlr_log(WLR_INFO, "Creating scenefx GLES2 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 GLES2 extensions: %s", exts_str);
+		fx_get_renderer_in_context(wlr_renderer);
 
-	// TODO: the rest of the gl checks
-	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");
-	}
+	push_fx_debug(renderer);
 
-	// quad fragment shader
-	if (!link_quad_program(&renderer->shaders.quad)) {
-		goto error;
-	}
-	// fragment shaders
-	if (!link_tex_program(&renderer->shaders.tex_rgba, SHADER_SOURCE_TEXTURE_RGBA)) {
-		goto error;
-	}
-	if (!link_tex_program(&renderer->shaders.tex_rgbx, SHADER_SOURCE_TEXTURE_RGBX)) {
-		goto error;
-	}
-	if (!link_tex_program(&renderer->shaders.tex_ext, SHADER_SOURCE_TEXTURE_EXTERNAL)) {
-		goto error;
-	}
-
-	// stencil mask shader
-	if (!link_stencil_mask_program(&renderer->shaders.stencil_mask)) {
-		goto error;
-	}
-	// box shadow shader
-	if (!link_box_shadow_program(&renderer->shaders.box_shadow)) {
-		goto error;
+	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(&wlr_renderer->events.lost, NULL);
+			pop_fx_debug(renderer);
+			return false;
+		}
 	}
 
-	if (!eglMakeCurrent(wlr_egl_get_display(egl),
-				EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT)) {
-		wlr_log(WLR_ERROR, "GLES2 RENDERER: Could not unset current EGL");
-		goto error;
-	}
+	glViewport(0, 0, width, height);
+	renderer->viewport_width = width;
+	renderer->viewport_height = height;
 
-	wlr_log(WLR_INFO, "GLES2 RENDERER: Shaders Initialized Successfully");
-	return renderer;
+	// refresh projection matrix
+	matrix_projection(renderer->projection, width, height,
+		WL_OUTPUT_TRANSFORM_FLIPPED_180);
 
-error:
-	glDeleteProgram(renderer->shaders.quad.program);
-	glDeleteProgram(renderer->shaders.tex_rgba.program);
-	glDeleteProgram(renderer->shaders.tex_rgbx.program);
-	glDeleteProgram(renderer->shaders.tex_ext.program);
-	glDeleteProgram(renderer->shaders.stencil_mask.program);
-	glDeleteProgram(renderer->shaders.box_shadow.program);
+	glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
 
-	if (!eglMakeCurrent(wlr_egl_get_display(egl),
-				EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT)) {
-		wlr_log(WLR_ERROR, "GLES2 RENDERER: Could not unset current EGL");
-	}
+	// XXX: maybe we should save output projection and remove some of the need
+	// for users to sling matricies themselves
 
-	// TODO: more freeing?
-	free(renderer);
+	pop_fx_debug(renderer);
 
-	wlr_log(WLR_ERROR, "GLES2 RENDERER: Error Initializing Shaders");
-	return NULL;
+	return true;
 }
 
-void fx_renderer_fini(struct fx_renderer *renderer) {
-	fx_stencilbuffer_release(&renderer->stencil_buffer);
+static void fx_renderer_end(struct wlr_renderer *wlr_renderer) {
+	fx_get_renderer_in_context(wlr_renderer);
+	// no-op
 }
 
-void fx_renderer_begin(struct fx_renderer *renderer, int width, int height) {
-	fx_stencilbuffer_init(&renderer->stencil_buffer, width, height);
-
-	glViewport(0, 0, width, height);
-
-	// refresh projection matrix
-	matrix_projection(renderer->projection, width, height,
-		WL_OUTPUT_TRANSFORM_FLIPPED_180);
-
-	glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
-}
+static void fx_renderer_clear(struct wlr_renderer *wlr_renderer,
+		const float color[static 4]) {
+	struct fx_renderer *renderer =
+		fx_get_renderer_in_context(wlr_renderer);
 
-void fx_renderer_clear(const float color[static 4]) {
+	push_fx_debug(renderer);
 	glClearColor(color[0], color[1], color[2], color[3]);
 	glClearStencil(0);
 	glClear(GL_COLOR_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
+	pop_fx_debug(renderer);
 }
 
-void fx_renderer_scissor(struct wlr_box *box) {
-	if (box) {
+static void fx_renderer_scissor(struct wlr_renderer *wlr_renderer,
+		struct wlr_box *box) {
+	struct fx_renderer *renderer =
+		fx_get_renderer_in_context(wlr_renderer);
+
+	push_fx_debug(renderer);
+	if (box != NULL) {
 		glScissor(box->x, box->y, box->width, box->height);
 		glEnable(GL_SCISSOR_TEST);
 	} else {
 		glDisable(GL_SCISSOR_TEST);
 	}
+	pop_fx_debug(renderer);
 }
 
-void fx_renderer_stencil_mask_init(void) {
-	glClearStencil(0);
-	glClear(GL_STENCIL_BUFFER_BIT);
-	glEnable(GL_STENCIL_TEST);
-
-	glStencilFunc(GL_ALWAYS, 1, 0xFF);
-	glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
-	// Disable writing to color buffer
-	glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
-}
-
-void fx_renderer_stencil_mask_close(bool draw_inside_mask) {
-	// Reenable writing to color buffer
-	glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
-	if (draw_inside_mask) {
-		glStencilFunc(GL_EQUAL, 1, 0xFF);
-		glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
-		return;
-	}
-	glStencilFunc(GL_NOTEQUAL, 1, 0xFF);
-	glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
-}
-
-void fx_renderer_stencil_mask_fini(void) {
-	glClearStencil(0);
-	glClear(GL_STENCIL_BUFFER_BIT);
-	glDisable(GL_STENCIL_TEST);
-}
-
-void fx_renderer_stencil_enable(void) {
-	glEnable(GL_STENCIL_TEST);
-}
-
-void fx_renderer_stencil_disable(void) {
-	glDisable(GL_STENCIL_TEST);
-}
-
-bool fx_render_subtexture_with_matrix(struct fx_renderer *renderer,
-		struct wlr_texture *wlr_texture, const struct wlr_fbox *src_box,
-		const struct wlr_box *dst_box, const float matrix[static 9],
-		float opacity, int corner_radius) {
-
-	assert(wlr_texture_is_gles2(wlr_texture));
-	struct wlr_gles2_texture_attribs texture_attrs;
-	wlr_gles2_texture_get_attribs(wlr_texture, &texture_attrs);
+static bool fx_render_subtexture_with_matrix(
+		struct wlr_renderer *wlr_renderer, struct wlr_texture *wlr_texture,
+		const struct wlr_fbox *box, const float matrix[static 9],
+		float alpha) {
+	struct fx_renderer *renderer = fx_get_renderer_in_context(wlr_renderer);
+	struct fx_texture *texture = fx_get_texture(wlr_texture);
+	assert(texture->fx_renderer == renderer);
 
 	struct tex_shader *shader = NULL;
 
-	switch (texture_attrs.target) {
+	switch (texture->target) {
 	case GL_TEXTURE_2D:
-		if (texture_attrs.has_alpha) {
+		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;
-
-		if (!renderer->exts.OES_egl_image_external) {
-			wlr_log(WLR_ERROR, "Failed to render texture: "
-				"GL_TEXTURE_EXTERNAL_OES not supported");
-			return false;
-		}
 		break;
 	default:
 		wlr_log(WLR_ERROR, "Aborting render");
@@ -407,12 +215,9 @@ bool fx_render_subtexture_with_matrix(struct fx_renderer *renderer,
 	float gl_matrix[9];
 	wlr_matrix_multiply(gl_matrix, renderer->projection, matrix);
 
-	// OpenGL ES 2 requires the glUniformMatrix3fv transpose parameter to be set
-	// to GL_FALSE
-	wlr_matrix_transpose(gl_matrix, gl_matrix);
+	push_fx_debug(renderer);
 
-	// if there's no opacity or rounded corners we don't need to blend
-	if (!texture_attrs.has_alpha && opacity == 1.0 && !corner_radius) {
+	if (!texture->has_alpha && alpha == 1.0) {
 		glDisable(GL_BLEND);
 	} else {
 		glEnable(GL_BLEND);
@@ -421,62 +226,49 @@ bool fx_render_subtexture_with_matrix(struct fx_renderer *renderer,
 	glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
 
 	glActiveTexture(GL_TEXTURE0);
-	glBindTexture(texture_attrs.target, texture_attrs.tex);
+	glBindTexture(texture->target, texture->tex);
 
-	glTexParameteri(texture_attrs.target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+	glTexParameteri(texture->target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 
 	glUseProgram(shader->program);
 
 	glUniformMatrix3fv(shader->proj, 1, GL_FALSE, gl_matrix);
 	glUniform1i(shader->tex, 0);
-	glUniform2f(shader->size, dst_box->width, dst_box->height);
-	glUniform2f(shader->position, dst_box->x, dst_box->y);
-	glUniform1f(shader->alpha, opacity);
-	glUniform1f(shader->radius, corner_radius);
-
-	const GLfloat x1 = src_box->x / wlr_texture->width;
-	const GLfloat y1 = src_box->y / wlr_texture->height;
-	const GLfloat x2 = (src_box->x + src_box->width) / wlr_texture->width;
-	const GLfloat y2 = (src_box->y + src_box->height) / wlr_texture->height;
-	const GLfloat texcoord[] = {
-		x2, y1, // top right
-		x1, y1, // top left
-		x2, y2, // bottom right
-		x1, y2, // bottom left
-	};
+	glUniform1f(shader->alpha, alpha);
+	glUniform2f(shader->size, box->width, box->height);
+	glUniform2f(shader->position, box->x, box->y);
+	glUniform1f(shader->radius, 0);
+
+	float tex_matrix[9];
+	wlr_matrix_identity(tex_matrix);
+	wlr_matrix_translate(tex_matrix, box->x / texture->wlr_texture.width,
+		box->y / texture->wlr_texture.height);
+	wlr_matrix_scale(tex_matrix, box->width / texture->wlr_texture.width,
+		box->height / texture->wlr_texture.height);
+	glUniformMatrix3fv(shader->tex_proj, 1, GL_FALSE, tex_matrix);
 
 	glVertexAttribPointer(shader->pos_attrib, 2, GL_FLOAT, GL_FALSE, 0, verts);
-	glVertexAttribPointer(shader->tex_attrib, 2, GL_FLOAT, GL_FALSE, 0, texcoord);
 
 	glEnableVertexAttribArray(shader->pos_attrib);
-	glEnableVertexAttribArray(shader->tex_attrib);
 
 	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 
 	glDisableVertexAttribArray(shader->pos_attrib);
-	glDisableVertexAttribArray(shader->tex_attrib);
 
-	glBindTexture(texture_attrs.target, 0);
+	glBindTexture(texture->target, 0);
 
+	pop_fx_debug(renderer);
 	return true;
 }
 
-void fx_render_rect(struct fx_renderer *renderer, const struct wlr_box *box,
-		const float color[static 4], const float projection[static 9]) {
-	if (box->width == 0 || box->height == 0) {
-		return;
-	}
-	assert(box->width > 0 && box->height > 0);
-	float matrix[9];
-	wlr_matrix_project_box(matrix, box, WL_OUTPUT_TRANSFORM_NORMAL, 0, projection);
+static void fx_render_quad_with_matrix(struct wlr_renderer *wlr_renderer,
+		const float color[static 4], const float matrix[static 9]) {
+	struct fx_renderer *renderer = fx_get_renderer_in_context(wlr_renderer);
 
 	float gl_matrix[9];
 	wlr_matrix_multiply(gl_matrix, renderer->projection, matrix);
 
-	// TODO: investigate why matrix is flipped prior to this cmd
-	// wlr_matrix_multiply(gl_matrix, flip_180, gl_matrix);
-
-	wlr_matrix_transpose(gl_matrix, gl_matrix);
+	push_fx_debug(renderer);
 
 	if (color[3] == 1.0) {
 		glDisable(GL_BLEND);
@@ -484,115 +276,505 @@ void fx_render_rect(struct fx_renderer *renderer, const struct wlr_box *box,
 		glEnable(GL_BLEND);
 	}
 
-	struct quad_shader shader = renderer->shaders.quad;
-	glUseProgram(shader.program);
+	glUseProgram(renderer->shaders.quad.program);
 
-	glUniformMatrix3fv(shader.proj, 1, GL_FALSE, gl_matrix);
-	glUniform4f(shader.color, color[0], color[1], color[2], color[3]);
+	glUniformMatrix3fv(renderer->shaders.quad.proj, 1, GL_FALSE, gl_matrix);
+	glUniform4f(renderer->shaders.quad.color, color[0], color[1], color[2], color[3]);
 
-	glVertexAttribPointer(shader.pos_attrib, 2, GL_FLOAT, GL_FALSE,
+	glVertexAttribPointer(renderer->shaders.quad.pos_attrib, 2, GL_FLOAT, GL_FALSE,
 			0, verts);
 
-	glEnableVertexAttribArray(shader.pos_attrib);
+	glEnableVertexAttribArray(renderer->shaders.quad.pos_attrib);
 
 	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 
-	glDisableVertexAttribArray(shader.pos_attrib);
+	glDisableVertexAttribArray(renderer->shaders.quad.pos_attrib);
+
+	pop_fx_debug(renderer);
 }
 
-static void fx_render_stencil_mask(struct fx_renderer *renderer,
-		const struct wlr_box *box, const float matrix[static 9],
-		int corner_radius) {
-	if (box->width == 0 || box->height == 0) {
-		return;
+static const uint32_t *fx_get_shm_texture_formats(
+		struct wlr_renderer *wlr_renderer, size_t *len) {
+	struct fx_renderer *renderer = fx_get_renderer(wlr_renderer);
+	return get_fx_shm_formats(renderer, len);
+}
+
+static const struct wlr_drm_format_set *fx_get_dmabuf_texture_formats(
+		struct wlr_renderer *wlr_renderer) {
+	struct fx_renderer *renderer = fx_get_renderer(wlr_renderer);
+	return wlr_egl_get_dmabuf_texture_formats(renderer->egl);
+}
+
+static const struct wlr_drm_format_set *fx_get_render_formats(
+		struct wlr_renderer *wlr_renderer) {
+	struct fx_renderer *renderer = fx_get_renderer(wlr_renderer);
+	return wlr_egl_get_dmabuf_render_formats(renderer->egl);
+}
+
+static uint32_t fx_preferred_read_format(
+		struct wlr_renderer *wlr_renderer) {
+	struct fx_renderer *renderer =
+		fx_get_renderer_in_context(wlr_renderer);
+
+	push_fx_debug(renderer);
+
+	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);
+
+	pop_fx_debug(renderer);
+
+	const struct fx_pixel_format *fmt =
+		get_fx_format_from_gl(gl_format, gl_type, alpha_size > 0);
+	if (fmt != NULL) {
+		return fmt->drm_format;
 	}
-	assert(box->width > 0 && box->height > 0);
 
-	// TODO: just pass gl_matrix?
-	float gl_matrix[9];
-	wlr_matrix_multiply(gl_matrix, renderer->projection, matrix);
+	if (renderer->exts.EXT_read_format_bgra) {
+		return DRM_FORMAT_XRGB8888;
+	}
+	return DRM_FORMAT_XBGR8888;
+}
 
-	// TODO: investigate why matrix is flipped prior to this cmd
-	// wlr_matrix_multiply(gl_matrix, flip_180, gl_matrix);
+static bool fx_read_pixels(struct wlr_renderer *wlr_renderer,
+		uint32_t drm_format, uint32_t stride,
+		uint32_t width, uint32_t height, uint32_t src_x, uint32_t src_y,
+		uint32_t dst_x, uint32_t dst_y, void *data) {
+	struct fx_renderer *renderer =
+		fx_get_renderer_in_context(wlr_renderer);
 
-	wlr_matrix_transpose(gl_matrix, gl_matrix);
+	const struct fx_pixel_format *fmt =
+		get_fx_format_from_drm(drm_format);
+	if (fmt == NULL || !is_fx_pixel_format_supported(renderer, fmt)) {
+		wlr_log(WLR_ERROR, "Cannot read pixels: unsupported pixel format 0x%"PRIX32, drm_format);
+		return false;
+	}
 
-	glEnable(GL_BLEND);
+	if (fmt->gl_format == GL_BGRA_EXT && !renderer->exts.EXT_read_format_bgra) {
+		wlr_log(WLR_ERROR,
+			"Cannot read pixels: missing GL_EXT_read_format_bgra extension");
+		return false;
+	}
 
-	struct stencil_mask_shader shader = renderer->shaders.stencil_mask;
+	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;
+	}
 
-	glUseProgram(shader.program);
+	push_fx_debug(renderer);
 
-	glUniformMatrix3fv(shader.proj, 1, GL_FALSE, gl_matrix);
+	// Make sure any pending drawing is finished before we try to read it
+	glFinish();
 
-	glUniform2f(shader.half_size, box->width * 0.5, box->height * 0.5);
-	glUniform2f(shader.position, box->x, box->y);
-	glUniform1f(shader.radius, corner_radius);
+	glGetError(); // Clear the error flag
 
-	glVertexAttribPointer(shader.pos_attrib, 2, GL_FLOAT, GL_FALSE,
-			0, verts);
+	unsigned char *p = (unsigned char *)data + dst_y * stride;
+	glPixelStorei(GL_PACK_ALIGNMENT, 1);
+	uint32_t pack_stride = pixel_format_info_min_stride(drm_fmt, width);
+	if (pack_stride == stride && dst_x == 0) {
+		// Under these particular conditions, we can read the pixels with only
+		// one glReadPixels call
 
-	glEnableVertexAttribArray(shader.pos_attrib);
+		glReadPixels(src_x, src_y, width, height, fmt->gl_format, fmt->gl_type, p);
+	} else {
+		// Unfortunately GLES2 doesn't support GL_PACK_ROW_LENGTH, so we have to read
+		// the lines out row by row
+		for (size_t i = 0; i < height; ++i) {
+			uint32_t y = src_y + i;
+			glReadPixels(src_x, y, width, 1, fmt->gl_format,
+				fmt->gl_type, p + i * stride + dst_x * drm_fmt->bytes_per_block);
+		}
+	}
 
-	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+	pop_fx_debug(renderer);
+
+	return glGetError() == GL_NO_ERROR;
+}
+
+static int fx_get_drm_fd(struct wlr_renderer *wlr_renderer) {
+	struct fx_renderer *renderer =
+		fx_get_renderer(wlr_renderer);
+
+	if (renderer->drm_fd < 0) {
+		renderer->drm_fd = wlr_egl_dup_drm_fd(renderer->egl);
+	}
 
-	glDisableVertexAttribArray(shader.pos_attrib);
+	return renderer->drm_fd;
 }
 
-void fx_render_box_shadow(struct fx_renderer *renderer,
-		const struct wlr_box *box, const struct wlr_box *stencil_box,
-		const float matrix[static 9], int corner_radius,
-		struct shadow_data *shadow_data) {
-	if (box->width == 0 || box->height == 0) {
+static uint32_t fx_get_render_buffer_caps(struct wlr_renderer *wlr_renderer) {
+	return WLR_BUFFER_CAP_DMABUF;
+}
+
+static void fx_renderer_destroy(struct wlr_renderer *wlr_renderer) {
+	struct fx_renderer *renderer = fx_get_renderer(wlr_renderer);
+
+	wlr_egl_make_current(renderer->egl);
+
+	struct fx_framebuffer *fx_buffer, *fx_buffer_tmp;
+	wl_list_for_each_safe(fx_buffer, fx_buffer_tmp, &renderer->buffers, link) {
+		fx_framebuffer_destroy(fx_buffer);
+	}
+
+	struct fx_texture *tex, *tex_tmp;
+	wl_list_for_each_safe(tex, tex_tmp, &renderer->textures, link) {
+		fx_texture_destroy(tex);
+	}
+
+	push_fx_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_fx_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);
+
+	if (renderer->drm_fd >= 0) {
+		close(renderer->drm_fd);
+	}
+
+	free(renderer);
+}
+
+static struct wlr_render_pass *begin_buffer_pass(struct wlr_renderer *wlr_renderer,
+		struct wlr_buffer *wlr_buffer, const struct wlr_buffer_pass_options *options) {
+	struct fx_gles_render_pass *pass =
+		fx_renderer_begin_buffer_pass(wlr_renderer, wlr_buffer, options);
+	if (!pass) {
+		return NULL;
+	}
+	return &pass->base;
+}
+
+static struct wlr_render_timer *fx_render_timer_create(struct wlr_renderer *wlr_renderer) {
+	struct fx_renderer *renderer = fx_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 fx_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_save_context(&prev_ctx);
+	wlr_egl_make_current(renderer->egl);
+	renderer->procs.glGenQueriesEXT(1, &timer->id);
+	wlr_egl_restore_context(&prev_ctx);
+
+	return &timer->base;
+}
+
+static int fx_get_render_time(struct wlr_render_timer *wlr_timer) {
+	struct fx_render_timer *timer = fx_get_render_timer(wlr_timer);
+	struct fx_renderer *renderer = timer->renderer;
+
+	struct wlr_egl_context prev_ctx;
+	wlr_egl_save_context(&prev_ctx);
+	wlr_egl_make_current(renderer->egl);
+
+	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 fx_render_timer_destroy(struct wlr_render_timer *wlr_timer) {
+	struct fx_render_timer *timer = wl_container_of(wlr_timer, timer, base);
+	struct fx_renderer *renderer = timer->renderer;
+
+	struct wlr_egl_context prev_ctx;
+	wlr_egl_save_context(&prev_ctx);
+	wlr_egl_make_current(renderer->egl);
+	renderer->procs.glDeleteQueriesEXT(1, &timer->id);
+	wlr_egl_restore_context(&prev_ctx);
+	free(timer);
+}
+
+static const struct wlr_renderer_impl renderer_impl = {
+	.destroy = fx_renderer_destroy,
+	.bind_buffer = fx_bind_main_buffer,
+	.begin = fx_renderer_begin,
+	.end = fx_renderer_end,
+	.clear = fx_renderer_clear,
+	.scissor = fx_renderer_scissor,
+	.render_subtexture_with_matrix = fx_render_subtexture_with_matrix,
+	.render_quad_with_matrix = fx_render_quad_with_matrix,
+	.get_shm_texture_formats = fx_get_shm_texture_formats,
+	.get_dmabuf_texture_formats = fx_get_dmabuf_texture_formats,
+	.get_render_formats = fx_get_render_formats,
+	.preferred_read_format = fx_preferred_read_format,
+	.read_pixels = fx_read_pixels,
+	.get_drm_fd = fx_get_drm_fd,
+	.get_render_buffer_caps = fx_get_render_buffer_caps,
+	.texture_from_buffer = fx_texture_from_buffer,
+	.begin_buffer_pass = begin_buffer_pass,
+	.render_timer_create = fx_render_timer_create,
+};
+
+static const struct wlr_render_timer_impl render_timer_impl = {
+	.get_duration_ns = fx_get_render_time,
+	.destroy = fx_render_timer_destroy,
+};
+
+void push_fx_debug_(struct fx_renderer *renderer,
+		const char *file, const char *func) {
+	if (!renderer->procs.glPushDebugGroupKHR) {
 		return;
 	}
-	assert(box->width > 0 && box->height > 0);
 
-	float *color = shadow_data->color;
-	float blur_sigma = shadow_data->blur_sigma;
+	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);
+}
 
-	float gl_matrix[9];
-	wlr_matrix_multiply(gl_matrix, renderer->projection, matrix);
+void pop_fx_debug(struct fx_renderer *renderer) {
+	if (renderer->procs.glPopDebugGroupKHR) {
+		renderer->procs.glPopDebugGroupKHR();
+	}
+}
+
+static enum wlr_log_importance fx_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;
+	}
+}
 
-	// TODO: investigate why matrix is flipped prior to this cmd
-	// wlr_matrix_multiply(gl_matrix, flip_180, gl_matrix);
+static void fx_log(GLenum src, GLenum type, GLuint id, GLenum severity,
+		GLsizei len, const GLchar *msg, const void *user) {
+	_wlr_log(fx_log_importance_to_wlr(type), "[GLES2] %s", msg);
+}
 
-	wlr_matrix_transpose(gl_matrix, gl_matrix);
+static struct wlr_renderer *renderer_autocreate(struct wlr_backend *backend, int drm_fd) {
+	bool own_drm_fd = false;
+	if (!open_preferred_drm_fd(backend, &drm_fd, &own_drm_fd)) {
+		wlr_log(WLR_ERROR, "Cannot create GLES2 renderer: no DRM FD available");
+		return NULL;
+	}
+
+	struct wlr_egl *egl = wlr_egl_create_with_drm_fd(drm_fd);
+	if (egl == NULL) {
+		wlr_log(WLR_ERROR, "Could not initialize EGL");
+		return NULL;
+	}
 
-	// Init stencil work
-	fx_renderer_stencil_mask_init();
-	// Draw the rounded rect as a mask
-	fx_render_stencil_mask(renderer, stencil_box, matrix, corner_radius);
-	fx_renderer_stencil_mask_close(false);
+	struct wlr_renderer *renderer = fx_renderer_create_egl(egl);
+	if (!renderer) {
+		wlr_log(WLR_ERROR, "Failed to create the FX renderer");
+		wlr_egl_destroy(egl);
+		return NULL;
+	}
 
-	// blending will practically always be needed (unless we have a madman
-	// who uses opaque shadows with zero sigma), so just enable it
-	glEnable(GL_BLEND);
+	if (own_drm_fd && drm_fd >= 0) {
+		close(drm_fd);
+	}
 
-	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+	return renderer;
+}
 
-	struct box_shadow_shader shader = renderer->shaders.box_shadow;
+struct wlr_renderer *fx_renderer_create_with_drm_fd(int drm_fd) {
+	assert(drm_fd >= 0);
 
-	glUseProgram(shader.program);
+	return renderer_autocreate(NULL, drm_fd);
+}
 
-	glUniformMatrix3fv(shader.proj, 1, GL_FALSE, gl_matrix);
-	glUniform4f(shader.color, color[0], color[1], color[2], color[3]);
-	glUniform1f(shader.blur_sigma, blur_sigma);
-	glUniform1f(shader.corner_radius, corner_radius);
+struct wlr_renderer *fx_renderer_create(struct wlr_backend *backend) {
+	return renderer_autocreate(backend, -1);
+}
 
-	glUniform2f(shader.size, box->width, box->height);
-	glUniform2f(shader.position, box->x, box->y);
+struct wlr_renderer *fx_renderer_create_egl(struct wlr_egl *egl) {
+	if (!wlr_egl_make_current(egl)) {
+		return NULL;
+	}
 
-	glVertexAttribPointer(shader.pos_attrib, 2, GL_FLOAT, GL_FALSE,
-			0, verts);
+	const char *exts_str = (const char *)glGetString(GL_EXTENSIONS);
+	if (exts_str == NULL) {
+		wlr_log(WLR_ERROR, "Failed to get GL_EXTENSIONS");
+		return NULL;
+	}
 
-	glEnableVertexAttribArray(shader.pos_attrib);
+	struct fx_renderer *renderer = calloc(1, sizeof(struct fx_renderer));
+	if (renderer == NULL) {
+		return NULL;
+	}
+	wlr_renderer_init(&renderer->wlr_renderer, &renderer_impl);
 
-	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+	wl_list_init(&renderer->buffers);
+	wl_list_init(&renderer->textures);
 
-	glDisableVertexAttribArray(shader.pos_attrib);
+	renderer->egl = egl;
+	renderer->exts_str = exts_str;
+	renderer->drm_fd = -1;
 
-	glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
+	wlr_log(WLR_INFO, "Creating scenefx FX 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 FX 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 GLES2");
+		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");
 
-	fx_renderer_stencil_mask_fini();
+	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");
+	}
+
+	// TODO: the rest of the gl checks
+	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");
+		load_gl_proc(&renderer->procs.glGetInteger64vEXT, "glGetInteger64vEXT");
+	}
+
+	if (renderer->exts.KHR_debug) {
+		glEnable(GL_DEBUG_OUTPUT_KHR);
+		glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS_KHR);
+		renderer->procs.glDebugMessageCallbackKHR(fx_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_fx_debug(renderer);
+
+	// Link all shaders
+	if (!link_shaders(renderer)) {
+		goto error;
+	}
+	pop_fx_debug(renderer);
+
+	wlr_log(WLR_INFO, "FX RENDERER: Shaders Initialized Successfully");
+
+	wlr_egl_unset_current(renderer->egl);
+
+	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);
+	glDeleteProgram(renderer->shaders.stencil_mask.program);
+	glDeleteProgram(renderer->shaders.box_shadow.program);
+
+	pop_fx_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;
 }
diff --git a/render/fx_renderer/fx_stencilbuffer.c b/render/fx_renderer/fx_stencilbuffer.c
deleted file mode 100644
index 4f57216..0000000
--- a/render/fx_renderer/fx_stencilbuffer.c
+++ /dev/null
@@ -1,50 +0,0 @@
-#include <assert.h>
-#include <wlr/render/gles2.h>
-#include <wlr/util/log.h>
-
-#include "include/render/fx_renderer/fx_stencilbuffer.h"
-
-struct fx_stencilbuffer fx_stencilbuffer_create(void) {
-	return (struct fx_stencilbuffer) {
-		.rb = -1,
-		.width = -1,
-		.height = -1,
-	};
-}
-
-void fx_stencilbuffer_init(struct fx_stencilbuffer *stencil_buffer, int width, int height) {
-	bool first_alloc = false;
-
-	if (stencil_buffer->rb == (uint32_t) -1) {
-		glGenRenderbuffers(1, &stencil_buffer->rb);
-		first_alloc = true;
-	}
-
-	if (first_alloc || stencil_buffer->width != width || stencil_buffer->height != height) {
-		glBindRenderbuffer(GL_RENDERBUFFER, stencil_buffer->rb);
-		glRenderbufferStorage(GL_RENDERBUFFER, GL_STENCIL_INDEX8, width, height);
-		stencil_buffer->width = width;
-		stencil_buffer->height = height;
-
-		GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
-		if (status != GL_FRAMEBUFFER_COMPLETE) {
-			wlr_log(WLR_ERROR,
-					"Stencil buffer incomplete, couldn't create! (FB status: %i)",
-					status);
-			return;
-		}
-	}
-
-	// Reattach the RenderBuffer to the FrameBuffer
-	glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT,
-			GL_RENDERBUFFER, stencil_buffer->rb);
-}
-
-void fx_stencilbuffer_release(struct fx_stencilbuffer *stencil_buffer) {
-	if (stencil_buffer->rb != (uint32_t) -1 && stencil_buffer->rb) {
-		glDeleteRenderbuffers(1, &stencil_buffer->rb);
-	}
-	stencil_buffer->rb = -1;
-	stencil_buffer->width = -1;
-	stencil_buffer->height = -1;
-}
diff --git a/render/fx_renderer/fx_texture.c b/render/fx_renderer/fx_texture.c
new file mode 100644
index 0000000..1952311
--- /dev/null
+++ b/render/fx_renderer/fx_texture.c
@@ -0,0 +1,368 @@
+#include <assert.h>
+#include <stdlib.h>
+#include <wlr/render/interface.h>
+#include <wlr/types/wlr_buffer.h>
+#include <wlr/util/log.h>
+#include <drm_fourcc.h>
+
+#include "render/fx_renderer/fx_renderer.h"
+#include "render/pixel_format.h"
+#include "render/egl.h"
+
+static const struct wlr_texture_impl texture_impl;
+
+bool wlr_texture_is_fx(struct wlr_texture *wlr_texture) {
+	return wlr_texture->impl == &texture_impl;
+}
+
+struct fx_texture *fx_get_texture(struct wlr_texture *wlr_texture) {
+	assert(wlr_texture_is_fx(wlr_texture));
+	struct fx_texture *texture = wl_container_of(wlr_texture, texture, wlr_texture);
+	return texture;
+}
+
+static bool fx_texture_update_from_buffer(struct wlr_texture *wlr_texture,
+		struct wlr_buffer *buffer, const pixman_region32_t *damage) {
+	struct fx_texture *texture = fx_get_texture(wlr_texture);
+
+	if (texture->target != GL_TEXTURE_2D || texture->image != EGL_NO_IMAGE_KHR) {
+		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 fx_pixel_format *fmt =
+		get_fx_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_save_context(&prev_ctx);
+	wlr_egl_make_current(texture->fx_renderer->egl);
+
+	push_fx_debug(texture->fx_renderer);
+
+	glBindTexture(GL_TEXTURE_2D, texture->tex);
+
+	int rects_len = 0;
+	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_fx_debug(texture->fx_renderer);
+
+	wlr_egl_restore_context(&prev_ctx);
+
+	wlr_buffer_end_data_ptr_access(buffer);
+
+	return true;
+}
+
+static bool fx_texture_invalidate(struct fx_texture *texture) {
+	if (texture->image == EGL_NO_IMAGE_KHR) {
+		return false;
+	}
+	if (texture->target == GL_TEXTURE_EXTERNAL_OES) {
+		// External changes are immediately made visible by the GL implementation
+		return true;
+	}
+
+	struct wlr_egl_context prev_ctx;
+	wlr_egl_save_context(&prev_ctx);
+	wlr_egl_make_current(texture->fx_renderer->egl);
+
+	push_fx_debug(texture->fx_renderer);
+
+	glBindTexture(texture->target, texture->tex);
+	texture->fx_renderer->procs.glEGLImageTargetTexture2DOES(texture->target,
+		texture->image);
+	glBindTexture(texture->target, 0);
+
+	pop_fx_debug(texture->fx_renderer);
+
+	wlr_egl_restore_context(&prev_ctx);
+
+	return true;
+}
+
+void fx_texture_destroy(struct fx_texture *texture) {
+	wl_list_remove(&texture->link);
+	if (texture->buffer != NULL) {
+		wlr_addon_finish(&texture->buffer_addon);
+	}
+
+	struct wlr_egl_context prev_ctx;
+	wlr_egl_save_context(&prev_ctx);
+	wlr_egl_make_current(texture->fx_renderer->egl);
+
+	glDeleteTextures(1, &texture->tex);
+	wlr_egl_destroy_image(texture->fx_renderer->egl, texture->image);
+
+	wlr_egl_restore_context(&prev_ctx);
+
+	free(texture);
+}
+
+static void fx_texture_unref(struct wlr_texture *wlr_texture) {
+	struct fx_texture *texture = fx_get_texture(wlr_texture);
+	if (texture->buffer != NULL) {
+		// Keep the texture around, in case the buffer is re-used later. We're
+		// still listening to the buffer's destroy event.
+		wlr_buffer_unlock(texture->buffer);
+	} else {
+		fx_texture_destroy(texture);
+	}
+}
+
+static const struct wlr_texture_impl texture_impl = {
+	.update_from_buffer = fx_texture_update_from_buffer,
+	.destroy = fx_texture_unref,
+};
+
+static struct fx_texture *fx_texture_create(
+		struct fx_renderer *renderer, uint32_t width, uint32_t height) {
+	struct fx_texture *texture = calloc(1, sizeof(struct fx_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->fx_renderer = renderer;
+	wl_list_insert(&renderer->textures, &texture->link);
+	return texture;
+}
+
+static struct wlr_texture *fx_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 fx_renderer *renderer = fx_get_renderer(wlr_renderer);
+
+	const struct fx_pixel_format *fmt = get_fx_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 fx_texture *texture =
+		fx_texture_create(renderer, width, height);
+	if (texture == NULL) {
+		return NULL;
+	}
+	texture->target = GL_TEXTURE_2D;
+	texture->has_alpha = fmt->has_alpha;
+	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_save_context(&prev_ctx);
+	wlr_egl_make_current(renderer->egl);
+
+	push_fx_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_fx_debug(renderer);
+
+	wlr_egl_restore_context(&prev_ctx);
+
+	return &texture->wlr_texture;
+}
+
+static struct wlr_texture *fx_texture_from_dmabuf(
+		struct wlr_renderer *wlr_renderer,
+		struct wlr_dmabuf_attributes *attribs) {
+	struct fx_renderer *renderer = fx_get_renderer(wlr_renderer);
+
+	if (!renderer->procs.glEGLImageTargetTexture2DOES) {
+		return NULL;
+	}
+
+	struct fx_texture *texture =
+		fx_texture_create(renderer, attribs->width, attribs->height);
+	if (texture == NULL) {
+		return NULL;
+	}
+	texture->drm_format = DRM_FORMAT_INVALID; // texture can't be written anyways
+
+	const struct wlr_pixel_format_info *drm_fmt =
+		drm_get_pixel_format_info(attribs->format);
+	if (drm_fmt != NULL) {
+		texture->has_alpha = drm_fmt->has_alpha;
+	} else {
+		// We don't know, assume the texture has an alpha channel
+		texture->has_alpha = true;
+	}
+
+	struct wlr_egl_context prev_ctx;
+	wlr_egl_save_context(&prev_ctx);
+	wlr_egl_make_current(renderer->egl);
+
+	bool external_only;
+	texture->image =
+		wlr_egl_create_image_from_dmabuf(renderer->egl, attribs, &external_only);
+	if (texture->image == EGL_NO_IMAGE_KHR) {
+		wlr_log(WLR_ERROR, "Failed to create EGL image from DMA-BUF");
+		wlr_egl_restore_context(&prev_ctx);
+		wl_list_remove(&texture->link);
+		free(texture);
+		return NULL;
+	}
+
+	texture->target = external_only ? GL_TEXTURE_EXTERNAL_OES : GL_TEXTURE_2D;
+
+	push_fx_debug(renderer);
+
+	glGenTextures(1, &texture->tex);
+	glBindTexture(texture->target, texture->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, texture->image);
+	glBindTexture(texture->target, 0);
+
+	pop_fx_debug(renderer);
+
+	wlr_egl_restore_context(&prev_ctx);
+
+	return &texture->wlr_texture;
+}
+
+static void texture_handle_buffer_destroy(struct wlr_addon *addon) {
+	struct fx_texture *texture =
+		wl_container_of(addon, texture, buffer_addon);
+	fx_texture_destroy(texture);
+}
+
+static const struct wlr_addon_interface texture_addon_impl = {
+	.name = "fx_texture",
+	.destroy = texture_handle_buffer_destroy,
+};
+
+static struct wlr_texture *fx_texture_from_dmabuf_buffer(
+		struct fx_renderer *renderer, struct wlr_buffer *buffer,
+		struct wlr_dmabuf_attributes *dmabuf) {
+	struct wlr_addon *addon =
+		wlr_addon_find(&buffer->addons, renderer, &texture_addon_impl);
+	if (addon != NULL) {
+		struct fx_texture *texture =
+			wl_container_of(addon, texture, buffer_addon);
+		if (!fx_texture_invalidate(texture)) {
+			wlr_log(WLR_ERROR, "Failed to invalidate texture");
+			return false;
+		}
+		wlr_buffer_lock(texture->buffer);
+		return &texture->wlr_texture;
+	}
+
+	struct wlr_texture *wlr_texture =
+		fx_texture_from_dmabuf(&renderer->wlr_renderer, dmabuf);
+	if (wlr_texture == NULL) {
+		return false;
+	}
+
+	struct fx_texture *texture = fx_get_texture(wlr_texture);
+	texture->buffer = wlr_buffer_lock(buffer);
+	wlr_addon_init(&texture->buffer_addon, &buffer->addons,
+		renderer, &texture_addon_impl);
+
+	return &texture->wlr_texture;
+}
+
+struct wlr_texture *fx_texture_from_buffer(struct wlr_renderer *wlr_renderer,
+		struct wlr_buffer *buffer) {
+	struct fx_renderer *renderer = fx_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 fx_texture_from_dmabuf_buffer(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 = fx_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 fx_texture_get_attribs(struct wlr_texture *wlr_texture,
+		struct fx_texture_attribs *attribs) {
+	struct fx_texture *texture = fx_get_texture(wlr_texture);
+	*attribs = (struct fx_texture_attribs){
+		.target = texture->target,
+		.tex = texture->tex,
+		.has_alpha = texture->has_alpha,
+	};
+}
diff --git a/render/fx_renderer/gles2/shaders/box_shadow.frag b/render/fx_renderer/gles2/shaders/box_shadow.frag
index c9b2b91..92d40fc 100644
--- a/render/fx_renderer/gles2/shaders/box_shadow.frag
+++ b/render/fx_renderer/gles2/shaders/box_shadow.frag
@@ -1,6 +1,11 @@
 // Writeup: https://madebyevan.com/shaders/fast-rounded-rectangle-shadows/
 
+#ifdef GL_FRAGMENT_PRECISION_HIGH
+precision highp float;
+#else
 precision mediump float;
+#endif
+
 varying vec4 v_color;
 varying vec2 v_texcoord;
 
diff --git a/render/fx_renderer/gles2/shaders/common.vert b/render/fx_renderer/gles2/shaders/common.vert
index 811e0f2..9e7b073 100644
--- a/render/fx_renderer/gles2/shaders/common.vert
+++ b/render/fx_renderer/gles2/shaders/common.vert
@@ -1,12 +1,13 @@
 uniform mat3 proj;
 uniform vec4 color;
+uniform mat3 tex_proj;
 attribute vec2 pos;
-attribute vec2 texcoord;
 varying vec4 v_color;
 varying vec2 v_texcoord;
 
 void main() {
-    gl_Position = vec4(proj * vec3(pos, 1.0), 1.0);
-    v_color = color;
-    v_texcoord = texcoord;
+	vec3 pos3 = vec3(pos, 1.0);
+	gl_Position = vec4(pos3 * proj, 1.0);
+	v_color = color;
+	v_texcoord = (pos3 * tex_proj).xy;
 }
diff --git a/render/fx_renderer/gles2/shaders/quad.frag b/render/fx_renderer/gles2/shaders/quad.frag
index 7c76327..97d3a31 100644
--- a/render/fx_renderer/gles2/shaders/quad.frag
+++ b/render/fx_renderer/gles2/shaders/quad.frag
@@ -1,7 +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 = v_color;
+	gl_FragColor = color;
 }
diff --git a/render/fx_renderer/gles2/shaders/stencil_mask.frag b/render/fx_renderer/gles2/shaders/stencil_mask.frag
index ee03307..523adc8 100644
--- a/render/fx_renderer/gles2/shaders/stencil_mask.frag
+++ b/render/fx_renderer/gles2/shaders/stencil_mask.frag
@@ -1,4 +1,9 @@
+#ifdef GL_FRAGMENT_PRECISION_HIGH
+precision highp float;
+#else
 precision mediump float;
+#endif
+
 varying vec2 v_texcoord;
 
 uniform vec2 half_size;
diff --git a/render/fx_renderer/gles2/shaders/tex.frag b/render/fx_renderer/gles2/shaders/tex.frag
index bd3c596..8c14373 100644
--- a/render/fx_renderer/gles2/shaders/tex.frag
+++ b/render/fx_renderer/gles2/shaders/tex.frag
@@ -10,7 +10,11 @@
 #extension GL_OES_EGL_image_external : require
 #endif
 
+#ifdef GL_FRAGMENT_PRECISION_HIGH
+precision highp float;
+#else
 precision mediump float;
+#endif
 
 varying vec2 v_texcoord;
 
@@ -21,6 +25,7 @@ uniform sampler2D tex;
 #endif
 
 uniform float alpha;
+
 uniform vec2 size;
 uniform vec2 position;
 uniform float radius;
diff --git a/render/fx_renderer/meson.build b/render/fx_renderer/meson.build
index 394caa3..d7160a8 100644
--- a/render/fx_renderer/meson.build
+++ b/render/fx_renderer/meson.build
@@ -7,7 +7,12 @@ endif
 
 wlr_files += files(
 	'matrix.c',
-	'fx_stencilbuffer.c',
+	'util.c',
+	'shaders.c',
+	'pixel_format.c',
+	'fx_pass.c',
+	'fx_framebuffer.c',
+	'fx_texture.c',
 	'fx_renderer.c',
 )
 
@@ -18,7 +23,6 @@ if 'gles2' in renderers or 'auto' in renderers
 
 	if egl.found() and gbm.found() and glesv2.found()
 		wlr_deps += [egl, gbm, glesv2]
-		internal_features += { 'egl': true , 'gles2-renderer': true }
 	endif
 	subdir('gles2')
 endif
diff --git a/render/fx_renderer/pixel_format.c b/render/fx_renderer/pixel_format.c
new file mode 100644
index 0000000..2693018
--- /dev/null
+++ b/render/fx_renderer/pixel_format.c
@@ -0,0 +1,175 @@
+#include <drm_fourcc.h>
+#include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+#include "render/fx_renderer/fx_renderer.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 fx_pixel_format formats[] = {
+	{
+		.drm_format = DRM_FORMAT_ARGB8888,
+		.gl_format = GL_BGRA_EXT,
+		.gl_type = GL_UNSIGNED_BYTE,
+		.has_alpha = true,
+	},
+	{
+		.drm_format = DRM_FORMAT_XRGB8888,
+		.gl_format = GL_BGRA_EXT,
+		.gl_type = GL_UNSIGNED_BYTE,
+		.has_alpha = false,
+	},
+	{
+		.drm_format = DRM_FORMAT_XBGR8888,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_UNSIGNED_BYTE,
+		.has_alpha = false,
+	},
+	{
+		.drm_format = DRM_FORMAT_ABGR8888,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_UNSIGNED_BYTE,
+		.has_alpha = true,
+	},
+	{
+		.drm_format = DRM_FORMAT_BGR888,
+		.gl_format = GL_RGB,
+		.gl_type = GL_UNSIGNED_BYTE,
+		.has_alpha = false,
+	},
+#if WLR_LITTLE_ENDIAN
+	{
+		.drm_format = DRM_FORMAT_RGBX4444,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_UNSIGNED_SHORT_4_4_4_4,
+		.has_alpha = false,
+	},
+	{
+		.drm_format = DRM_FORMAT_RGBA4444,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_UNSIGNED_SHORT_4_4_4_4,
+		.has_alpha = true,
+	},
+	{
+		.drm_format = DRM_FORMAT_RGBX5551,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_UNSIGNED_SHORT_5_5_5_1,
+		.has_alpha = false,
+	},
+	{
+		.drm_format = DRM_FORMAT_RGBA5551,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_UNSIGNED_SHORT_5_5_5_1,
+		.has_alpha = true,
+	},
+	{
+		.drm_format = DRM_FORMAT_RGB565,
+		.gl_format = GL_RGB,
+		.gl_type = GL_UNSIGNED_SHORT_5_6_5,
+		.has_alpha = false,
+	},
+	{
+		.drm_format = DRM_FORMAT_XBGR2101010,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_UNSIGNED_INT_2_10_10_10_REV_EXT,
+		.has_alpha = false,
+	},
+	{
+		.drm_format = DRM_FORMAT_ABGR2101010,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_UNSIGNED_INT_2_10_10_10_REV_EXT,
+		.has_alpha = true,
+	},
+	{
+		.drm_format = DRM_FORMAT_XBGR16161616F,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_HALF_FLOAT_OES,
+		.has_alpha = false,
+	},
+	{
+		.drm_format = DRM_FORMAT_ABGR16161616F,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_HALF_FLOAT_OES,
+		.has_alpha = true,
+	},
+	{
+		.drm_format = DRM_FORMAT_XBGR16161616,
+		.gl_internalformat = GL_RGBA16_EXT,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_UNSIGNED_SHORT,
+		.has_alpha = false,
+	},
+	{
+		.drm_format = DRM_FORMAT_ABGR16161616,
+		.gl_internalformat = GL_RGBA16_EXT,
+		.gl_format = GL_RGBA,
+		.gl_type = GL_UNSIGNED_SHORT,
+		.has_alpha = true,
+	},
+#endif
+};
+
+// TODO: more pixel formats
+
+/*
+ * Return true if supported for texturing, even if other operations like
+ * reading aren't supported.
+ */
+bool is_fx_pixel_format_supported(const struct fx_renderer *renderer,
+		const struct fx_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 fx_pixel_format *get_fx_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 fx_pixel_format *get_fx_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 &&
+				formats[i].has_alpha == alpha) {
+			return &formats[i];
+		}
+	}
+	return NULL;
+}
+
+const uint32_t *get_fx_shm_formats(const struct fx_renderer *renderer,
+		size_t *len) {
+	static uint32_t shm_formats[sizeof(formats) / sizeof(formats[0])];
+	size_t j = 0;
+	for (size_t i = 0; i < sizeof(formats) / sizeof(formats[0]); i++) {
+		if (!is_fx_pixel_format_supported(renderer, &formats[i])) {
+			continue;
+		}
+		shm_formats[j++] = formats[i].drm_format;
+	}
+	*len = j;
+	return shm_formats;
+}
diff --git a/render/fx_renderer/shaders.c b/render/fx_renderer/shaders.c
new file mode 100644
index 0000000..9257ca3
--- /dev/null
+++ b/render/fx_renderer/shaders.c
@@ -0,0 +1,203 @@
+#include <EGL/egl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <wlr/util/log.h>
+
+#include "render/fx_renderer/fx_renderer.h"
+#include "render/fx_renderer/shaders.h"
+
+// shaders
+#include "common_vert_src.h"
+#include "quad_frag_src.h"
+#include "tex_frag_src.h"
+#include "stencil_mask_frag_src.h"
+#include "box_shadow_frag_src.h"
+
+GLuint compile_shader(GLuint type, const GLchar *src) {
+	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;
+	}
+
+	return shader;
+}
+
+GLuint link_program(const GLchar *frag_src) {
+	const GLchar *vert_src = common_vert_src;
+	GLuint vert = compile_shader(GL_VERTEX_SHADER, vert_src);
+	if (!vert) {
+		goto error;
+	}
+
+	GLuint frag = compile_shader(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;
+	}
+
+	return prog;
+
+error:
+	return 0;
+}
+
+
+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;
+}
+
+void load_gl_proc(void *proc_ptr, const char *name) {
+	void *proc = (void *)eglGetProcAddress(name);
+	if (proc == NULL) {
+		wlr_log(WLR_ERROR, "FX RENDERER: eglGetProcAddress(%s) failed", name);
+		abort();
+	}
+	*(void **)proc_ptr = proc;
+}
+
+// Shaders
+
+static bool link_quad_program(struct quad_shader *shader) {
+	GLuint prog;
+	shader->program = prog = link_program(quad_frag_src);
+	if (!shader->program) {
+		return false;
+	}
+
+	shader->proj = glGetUniformLocation(prog, "proj");
+	shader->color = glGetUniformLocation(prog, "color");
+	shader->pos_attrib = glGetAttribLocation(prog, "pos");
+
+	return true;
+}
+
+static bool link_tex_program(struct tex_shader *shader,
+		enum fx_tex_shader_source source) {
+	GLchar frag_src[2048];
+	snprintf(frag_src, sizeof(frag_src),
+		"#define SOURCE %d\n%s", source, tex_frag_src);
+
+	GLuint prog;
+	shader->program = prog = link_program(frag_src);
+	if (!shader->program) {
+		return false;
+	}
+
+	shader->proj = glGetUniformLocation(prog, "proj");
+	shader->tex = glGetUniformLocation(prog, "tex");
+	shader->alpha = glGetUniformLocation(prog, "alpha");
+	shader->pos_attrib = glGetAttribLocation(prog, "pos");
+	shader->tex_proj = glGetUniformLocation(prog, "tex_proj");
+	shader->size = glGetUniformLocation(prog, "size");
+	shader->position = glGetUniformLocation(prog, "position");
+	shader->radius = glGetUniformLocation(prog, "radius");
+
+	return true;
+}
+
+static bool link_stencil_mask_program(struct stencil_mask_shader *shader) {
+	GLuint prog;
+	shader->program = prog = link_program(stencil_mask_frag_src);
+	if (!shader->program) {
+		return false;
+	}
+
+	shader->proj = glGetUniformLocation(prog, "proj");
+	shader->color = glGetUniformLocation(prog, "color");
+	shader->pos_attrib = glGetAttribLocation(prog, "pos");
+	shader->position = glGetUniformLocation(prog, "position");
+	shader->half_size = glGetUniformLocation(prog, "half_size");
+	shader->radius = glGetUniformLocation(prog, "radius");
+
+	return true;
+}
+
+static bool link_box_shadow_program(struct box_shadow_shader *shader) {
+	GLuint prog;
+	shader->program = prog = link_program(box_shadow_frag_src);
+	if (!shader->program) {
+		return false;
+	}
+	shader->proj = glGetUniformLocation(prog, "proj");
+	shader->color = glGetUniformLocation(prog, "color");
+	shader->pos_attrib = glGetAttribLocation(prog, "pos");
+	shader->position = glGetUniformLocation(prog, "position");
+	shader->size = glGetUniformLocation(prog, "size");
+	shader->blur_sigma = glGetUniformLocation(prog, "blur_sigma");
+	shader->corner_radius = glGetUniformLocation(prog, "corner_radius");
+
+	return true;
+}
+
+bool link_shaders(struct fx_renderer *renderer) {
+	// quad fragment shader
+	if (!link_quad_program(&renderer->shaders.quad)) {
+		wlr_log(WLR_ERROR, "Could not link quad shader");
+		return false;
+	}
+	// fragment shaders
+	if (!link_tex_program(&renderer->shaders.tex_rgba, SHADER_SOURCE_TEXTURE_RGBA)) {
+		wlr_log(WLR_ERROR, "Could not link tex_RGBA shader");
+		return false;
+	}
+	if (!link_tex_program(&renderer->shaders.tex_rgbx, SHADER_SOURCE_TEXTURE_RGBX)) {
+		wlr_log(WLR_ERROR, "Could not link tex_RGBX shader");
+		return false;
+	}
+	if (!link_tex_program(&renderer->shaders.tex_ext, SHADER_SOURCE_TEXTURE_EXTERNAL)) {
+		wlr_log(WLR_ERROR, "Could not link tex_EXTERNAL shader");
+		return false;
+	}
+
+	// stencil mask shader
+	if (!link_stencil_mask_program(&renderer->shaders.stencil_mask)) {
+		wlr_log(WLR_ERROR, "Could not link stencil mask shader");
+		return false;
+	}
+	// box shadow shader
+	if (!link_box_shadow_program(&renderer->shaders.box_shadow)) {
+		wlr_log(WLR_ERROR, "Could not link box shadow shader");
+		return false;
+	}
+
+	return true;
+}
diff --git a/render/fx_renderer/util.c b/render/fx_renderer/util.c
new file mode 100644
index 0000000..c262aab
--- /dev/null
+++ b/render/fx_renderer/util.c
@@ -0,0 +1,113 @@
+#define _POSIX_C_SOURCE 200809L
+#include <fcntl.h>
+#include <unistd.h>
+#include <wlr/util/log.h>
+#include <wlr/types/wlr_buffer.h>
+#include <xf86drm.h>
+
+#include "render/fx_renderer/util.h"
+
+static uint32_t backend_get_buffer_caps(struct wlr_backend *backend) {
+	if (!backend->impl->get_buffer_caps) {
+		return 0;
+	}
+
+	return backend->impl->get_buffer_caps(backend);
+}
+
+static int open_drm_render_node(void) {
+	uint32_t flags = 0;
+	int devices_len = drmGetDevices2(flags, NULL, 0);
+	if (devices_len < 0) {
+		wlr_log(WLR_ERROR, "drmGetDevices2 failed: %s", strerror(-devices_len));
+		return -1;
+	}
+	drmDevice **devices = calloc(devices_len, sizeof(*devices));
+	if (devices == NULL) {
+		wlr_log_errno(WLR_ERROR, "Allocation failed");
+		return -1;
+	}
+	devices_len = drmGetDevices2(flags, devices, devices_len);
+	if (devices_len < 0) {
+		free(devices);
+		wlr_log(WLR_ERROR, "drmGetDevices2 failed: %s", strerror(-devices_len));
+		return -1;
+	}
+
+	int fd = -1;
+	for (int i = 0; i < devices_len; i++) {
+		drmDevice *dev = devices[i];
+		if (dev->available_nodes & (1 << DRM_NODE_RENDER)) {
+			const char *name = dev->nodes[DRM_NODE_RENDER];
+			wlr_log(WLR_DEBUG, "Opening DRM render node '%s'", name);
+			fd = open(name, O_RDWR | O_CLOEXEC);
+			if (fd < 0) {
+				wlr_log_errno(WLR_ERROR, "Failed to open '%s'", name);
+				goto out;
+			}
+			break;
+		}
+	}
+	if (fd < 0) {
+		wlr_log(WLR_ERROR, "Failed to find any DRM render node");
+	}
+
+out:
+	for (int i = 0; i < devices_len; i++) {
+		drmFreeDevice(&devices[i]);
+	}
+	free(devices);
+
+	return fd;
+}
+
+bool open_preferred_drm_fd(struct wlr_backend *backend, int *drm_fd_ptr,
+		bool *own_drm_fd) {
+	if (*drm_fd_ptr >= 0) {
+		return true;
+	}
+
+	// Allow the user to override the render node
+	const char *render_name = getenv("WLR_RENDER_DRM_DEVICE");
+	if (render_name != NULL) {
+		wlr_log(WLR_INFO,
+			"Opening DRM render node '%s' from WLR_RENDER_DRM_DEVICE",
+			render_name);
+		int drm_fd = open(render_name, O_RDWR | O_CLOEXEC);
+		if (drm_fd < 0) {
+			wlr_log_errno(WLR_ERROR, "Failed to open '%s'", render_name);
+			return false;
+		}
+		if (drmGetNodeTypeFromFd(drm_fd) != DRM_NODE_RENDER) {
+			wlr_log(WLR_ERROR, "'%s' is not a DRM render node", render_name);
+			close(drm_fd);
+			return false;
+		}
+		*drm_fd_ptr = drm_fd;
+		*own_drm_fd = true;
+		return true;
+	}
+
+	// Prefer the backend's DRM node, if any
+	int backend_drm_fd = wlr_backend_get_drm_fd(backend);
+	if (backend_drm_fd >= 0) {
+		*drm_fd_ptr = backend_drm_fd;
+		*own_drm_fd = false;
+		return true;
+	}
+
+	// If the backend hasn't picked a DRM FD, but accepts DMA-BUFs, pick an
+	// arbitrary render node
+	uint32_t backend_caps = backend_get_buffer_caps(backend);
+	if (backend_caps & WLR_BUFFER_CAP_DMABUF) {
+		int drm_fd = open_drm_render_node();
+		if (drm_fd < 0) {
+			return false;
+		}
+		*drm_fd_ptr = drm_fd;
+		*own_drm_fd = true;
+		return true;
+	}
+
+	return false;
+}
diff --git a/render/meson.build b/render/meson.build
index 4dd5c6a..56579ee 100644
--- a/render/meson.build
+++ b/render/meson.build
@@ -1,5 +1,6 @@
 wlr_files += files(
 	'pixel_format.c',
+	'egl.c',
 )
 
 subdir('fx_renderer')
diff --git a/render/pixel_format.c b/render/pixel_format.c
index 46bcecf..b81f561 100644
--- a/render/pixel_format.c
+++ b/render/pixel_format.c
@@ -1,178 +1,252 @@
-#include "render/pixel_format.h"
+#include <assert.h>
 #include <drm_fourcc.h>
+#include <wlr/util/log.h>
+#include "render/pixel_format.h"
 
 static const struct wlr_pixel_format_info pixel_format_info[] = {
-    {
-        .drm_format = DRM_FORMAT_XRGB8888,
-        .opaque_substitute = DRM_FORMAT_INVALID,
-        .bpp = 32,
-        .has_alpha = false,
-    },
-    {
-        .drm_format = DRM_FORMAT_ARGB8888,
-        .opaque_substitute = DRM_FORMAT_XRGB8888,
-        .bpp = 32,
-        .has_alpha = true,
-    },
-    {
-        .drm_format = DRM_FORMAT_XBGR8888,
-        .opaque_substitute = DRM_FORMAT_INVALID,
-        .bpp = 32,
-        .has_alpha = false,
-    },
-    {
-        .drm_format = DRM_FORMAT_ABGR8888,
-        .opaque_substitute = DRM_FORMAT_XBGR8888,
-        .bpp = 32,
-        .has_alpha = true,
-    },
-    {
-        .drm_format = DRM_FORMAT_RGBX8888,
-        .opaque_substitute = DRM_FORMAT_INVALID,
-        .bpp = 32,
-        .has_alpha = false,
-    },
-    {
-        .drm_format = DRM_FORMAT_RGBA8888,
-        .opaque_substitute = DRM_FORMAT_RGBX8888,
-        .bpp = 32,
-        .has_alpha = true,
-    },
-    {
-        .drm_format = DRM_FORMAT_BGRX8888,
-        .opaque_substitute = DRM_FORMAT_INVALID,
-        .bpp = 32,
-        .has_alpha = false,
-    },
-    {
-        .drm_format = DRM_FORMAT_BGRA8888,
-        .opaque_substitute = DRM_FORMAT_BGRX8888,
-        .bpp = 32,
-        .has_alpha = true,
-    },
-    {
-        .drm_format = DRM_FORMAT_BGR888,
-        .opaque_substitute = DRM_FORMAT_INVALID,
-        .bpp = 24,
-        .has_alpha = false,
-    },
-    {
-        .drm_format = DRM_FORMAT_RGBX4444,
-        .opaque_substitute = DRM_FORMAT_INVALID,
-        .bpp = 16,
-        .has_alpha = false,
-    },
-    {
-        .drm_format = DRM_FORMAT_RGBA4444,
-        .opaque_substitute = DRM_FORMAT_RGBX4444,
-        .bpp = 16,
-        .has_alpha = true,
-    },
-    {
-        .drm_format = DRM_FORMAT_RGBX5551,
-        .opaque_substitute = DRM_FORMAT_INVALID,
-        .bpp = 16,
-        .has_alpha = false,
-    },
-    {
-        .drm_format = DRM_FORMAT_RGBA5551,
-        .opaque_substitute = DRM_FORMAT_RGBX5551,
-        .bpp = 16,
-        .has_alpha = true,
-    },
-    {
-        .drm_format = DRM_FORMAT_RGB565,
-        .opaque_substitute = DRM_FORMAT_INVALID,
-        .bpp = 16,
-        .has_alpha = false,
-    },
-    {
-        .drm_format = DRM_FORMAT_BGR565,
-        .opaque_substitute = DRM_FORMAT_INVALID,
-        .bpp = 16,
-        .has_alpha = false,
-    },
-    {
-        .drm_format = DRM_FORMAT_XRGB2101010,
-        .opaque_substitute = DRM_FORMAT_INVALID,
-        .bpp = 32,
-        .has_alpha = false,
-    },
-    {
-        .drm_format = DRM_FORMAT_ARGB2101010,
-        .opaque_substitute = DRM_FORMAT_XRGB2101010,
-        .bpp = 32,
-        .has_alpha = true,
-    },
-    {
-        .drm_format = DRM_FORMAT_XBGR2101010,
-        .opaque_substitute = DRM_FORMAT_INVALID,
-        .bpp = 32,
-        .has_alpha = false,
-    },
-    {
-        .drm_format = DRM_FORMAT_ABGR2101010,
-        .opaque_substitute = DRM_FORMAT_XBGR2101010,
-        .bpp = 32,
-        .has_alpha = true,
-    },
-    {
-        .drm_format = DRM_FORMAT_XBGR16161616F,
-        .opaque_substitute = DRM_FORMAT_INVALID,
-        .bpp = 64,
-        .has_alpha = false,
-    },
-    {
-        .drm_format = DRM_FORMAT_ABGR16161616F,
-        .opaque_substitute = DRM_FORMAT_XBGR16161616F,
-        .bpp = 64,
-        .has_alpha = true,
-    },
-    {
-        .drm_format = DRM_FORMAT_XBGR16161616,
-        .opaque_substitute = DRM_FORMAT_INVALID,
-        .bpp = 64,
-        .has_alpha = false,
-    },
-    {
-        .drm_format = DRM_FORMAT_ABGR16161616,
-        .opaque_substitute = DRM_FORMAT_XBGR16161616,
-        .bpp = 64,
-        .has_alpha = true,
-    },
+	{
+		.drm_format = DRM_FORMAT_XRGB8888,
+		.bytes_per_block = 4,
+	},
+	{
+		.drm_format = DRM_FORMAT_ARGB8888,
+		.opaque_substitute = DRM_FORMAT_XRGB8888,
+		.bytes_per_block = 4,
+		.has_alpha = true,
+	},
+	{
+		.drm_format = DRM_FORMAT_XBGR8888,
+		.bytes_per_block = 4,
+	},
+	{
+		.drm_format = DRM_FORMAT_ABGR8888,
+		.opaque_substitute = DRM_FORMAT_XBGR8888,
+		.bytes_per_block = 4,
+		.has_alpha = true,
+	},
+	{
+		.drm_format = DRM_FORMAT_RGBX8888,
+		.bytes_per_block = 4,
+	},
+	{
+		.drm_format = DRM_FORMAT_RGBA8888,
+		.opaque_substitute = DRM_FORMAT_RGBX8888,
+		.bytes_per_block = 4,
+		.has_alpha = true,
+	},
+	{
+		.drm_format = DRM_FORMAT_BGRX8888,
+		.bytes_per_block = 4,
+	},
+	{
+		.drm_format = DRM_FORMAT_BGRA8888,
+		.opaque_substitute = DRM_FORMAT_BGRX8888,
+		.bytes_per_block = 4,
+		.has_alpha = true,
+	},
+	{
+		.drm_format = DRM_FORMAT_R8,
+		.bytes_per_block = 1,
+	},
+	{
+		.drm_format = DRM_FORMAT_GR88,
+		.bytes_per_block = 2,
+	},
+	{
+		.drm_format = DRM_FORMAT_RGB888,
+		.bytes_per_block = 3,
+	},
+	{
+		.drm_format = DRM_FORMAT_BGR888,
+		.bytes_per_block = 3,
+	},
+	{
+		.drm_format = DRM_FORMAT_RGBX4444,
+		.bytes_per_block = 2,
+	},
+	{
+		.drm_format = DRM_FORMAT_RGBA4444,
+		.opaque_substitute = DRM_FORMAT_RGBX4444,
+		.bytes_per_block = 2,
+		.has_alpha = true,
+	},
+	{
+		.drm_format = DRM_FORMAT_BGRX4444,
+		.bytes_per_block = 2,
+	},
+	{
+		.drm_format = DRM_FORMAT_BGRA4444,
+		.opaque_substitute = DRM_FORMAT_BGRX4444,
+		.bytes_per_block = 2,
+		.has_alpha = true,
+	},
+	{
+		.drm_format = DRM_FORMAT_RGBX5551,
+		.bytes_per_block = 2,
+	},
+	{
+		.drm_format = DRM_FORMAT_RGBA5551,
+		.opaque_substitute = DRM_FORMAT_RGBX5551,
+		.bytes_per_block = 2,
+		.has_alpha = true,
+	},
+	{
+		.drm_format = DRM_FORMAT_BGRX5551,
+		.bytes_per_block = 2,
+	},
+	{
+		.drm_format = DRM_FORMAT_BGRA5551,
+		.opaque_substitute = DRM_FORMAT_BGRX5551,
+		.bytes_per_block = 2,
+		.has_alpha = true,
+	},
+	{
+		.drm_format = DRM_FORMAT_XRGB1555,
+		.bytes_per_block = 2,
+	},
+	{
+		.drm_format = DRM_FORMAT_ARGB1555,
+		.opaque_substitute = DRM_FORMAT_XRGB1555,
+		.bytes_per_block = 2,
+		.has_alpha = true,
+	},
+	{
+		.drm_format = DRM_FORMAT_RGB565,
+		.bytes_per_block = 2,
+	},
+	{
+		.drm_format = DRM_FORMAT_BGR565,
+		.bytes_per_block = 2,
+	},
+	{
+		.drm_format = DRM_FORMAT_XRGB2101010,
+		.bytes_per_block = 4,
+	},
+	{
+		.drm_format = DRM_FORMAT_ARGB2101010,
+		.opaque_substitute = DRM_FORMAT_XRGB2101010,
+		.bytes_per_block = 4,
+		.has_alpha = true,
+	},
+	{
+		.drm_format = DRM_FORMAT_XBGR2101010,
+		.bytes_per_block = 4,
+	},
+	{
+		.drm_format = DRM_FORMAT_ABGR2101010,
+		.opaque_substitute = DRM_FORMAT_XBGR2101010,
+		.bytes_per_block = 4,
+		.has_alpha = true,
+	},
+	{
+		.drm_format = DRM_FORMAT_XBGR16161616F,
+		.bytes_per_block = 8,
+	},
+	{
+		.drm_format = DRM_FORMAT_ABGR16161616F,
+		.opaque_substitute = DRM_FORMAT_XBGR16161616F,
+		.bytes_per_block = 8,
+		.has_alpha = true,
+	},
+	{
+		.drm_format = DRM_FORMAT_XBGR16161616,
+		.bytes_per_block = 8,
+	},
+	{
+		.drm_format = DRM_FORMAT_ABGR16161616,
+		.opaque_substitute = DRM_FORMAT_XBGR16161616,
+		.bytes_per_block = 8,
+		.has_alpha = true,
+	},
+	{
+		.drm_format = DRM_FORMAT_YVYU,
+		.bytes_per_block = 4,
+		.block_width = 2,
+		.block_height = 1,
+	},
+	{
+		.drm_format = DRM_FORMAT_VYUY,
+		.bytes_per_block = 4,
+		.block_width = 2,
+		.block_height = 1,
+	},
 };
 
 static const size_t pixel_format_info_size =
-    sizeof(pixel_format_info) / sizeof(pixel_format_info[0]);
+	sizeof(pixel_format_info) / sizeof(pixel_format_info[0]);
 
 const struct wlr_pixel_format_info *drm_get_pixel_format_info(uint32_t fmt) {
-  for (size_t i = 0; i < pixel_format_info_size; ++i) {
-    if (pixel_format_info[i].drm_format == fmt) {
-      return &pixel_format_info[i];
-    }
-  }
+	for (size_t i = 0; i < pixel_format_info_size; ++i) {
+		if (pixel_format_info[i].drm_format == fmt) {
+			return &pixel_format_info[i];
+		}
+	}
 
-  return NULL;
+	return NULL;
 }
 
 uint32_t convert_wl_shm_format_to_drm(enum wl_shm_format fmt) {
-  switch (fmt) {
-  case WL_SHM_FORMAT_XRGB8888:
-    return DRM_FORMAT_XRGB8888;
-  case WL_SHM_FORMAT_ARGB8888:
-    return DRM_FORMAT_ARGB8888;
-  default:
-    return (uint32_t)fmt;
-  }
+	switch (fmt) {
+	case WL_SHM_FORMAT_XRGB8888:
+		return DRM_FORMAT_XRGB8888;
+	case WL_SHM_FORMAT_ARGB8888:
+		return DRM_FORMAT_ARGB8888;
+	default:
+		return (uint32_t)fmt;
+	}
 }
 
 enum wl_shm_format convert_drm_format_to_wl_shm(uint32_t fmt) {
-  switch (fmt) {
-  case DRM_FORMAT_XRGB8888:
-    return WL_SHM_FORMAT_XRGB8888;
-  case DRM_FORMAT_ARGB8888:
-    return WL_SHM_FORMAT_ARGB8888;
-  default:
-    return (enum wl_shm_format)fmt;
-  }
+	switch (fmt) {
+	case DRM_FORMAT_XRGB8888:
+		return WL_SHM_FORMAT_XRGB8888;
+	case DRM_FORMAT_ARGB8888:
+		return WL_SHM_FORMAT_ARGB8888;
+	default:
+		return (enum wl_shm_format)fmt;
+	}
+}
+
+uint32_t pixel_format_info_pixels_per_block(const struct wlr_pixel_format_info *info) {
+	uint32_t pixels = info->block_width * info->block_height;
+	return pixels > 0 ? pixels : 1;
+}
+
+static int32_t div_round_up(int32_t dividend, int32_t divisor) {
+	int32_t quotient = dividend / divisor;
+	if (dividend % divisor != 0) {
+		quotient++;
+	}
+	return quotient;
+}
+
+int32_t pixel_format_info_min_stride(const struct wlr_pixel_format_info *fmt, int32_t width) {
+	int32_t pixels_per_block = (int32_t)pixel_format_info_pixels_per_block(fmt);
+	int32_t bytes_per_block = (int32_t)fmt->bytes_per_block;
+	if (width > INT32_MAX / bytes_per_block) {
+		wlr_log(WLR_DEBUG, "Invalid width %d (overflow)", width);
+		return 0;
+	}
+	return div_round_up(width * bytes_per_block, pixels_per_block);
+}
+
+bool pixel_format_info_check_stride(const struct wlr_pixel_format_info *fmt,
+		int32_t stride, int32_t width) {
+	int32_t bytes_per_block = (int32_t)fmt->bytes_per_block;
+	if (stride % bytes_per_block != 0) {
+		wlr_log(WLR_DEBUG, "Invalid stride %d (incompatible with %d "
+			"bytes-per-block)", stride, bytes_per_block);
+		return false;
+	}
+
+	int32_t min_stride = pixel_format_info_min_stride(fmt, width);
+	if (min_stride <= 0) {
+		return false;
+	} else if (stride < min_stride) {
+		wlr_log(WLR_DEBUG, "Invalid stride %d (too small for %d "
+			"bytes-per-block and width %d)", stride, bytes_per_block, width);
+		return false;
+	}
+
+	return true;
 }