render/egl: remove *config_attribs and wlr_egl->config

Breaking changes:

Both "EGLint *config_attribs" and "wlr_egl->config" no longer exist.

include/wlr/render/egl.h

@@ -38,7 +38,6 @@ struct wlr_egl_context {
 
 struct wlr_egl {
 	EGLDisplay display;
-	EGLConfig config; // may be EGL_NO_CONFIG
 	EGLContext context;
 	EGLDeviceEXT device; // may be EGL_NO_DEVICE_EXT
 	struct gbm_device *gbm_device;
@@ -80,11 +79,8 @@ struct wlr_egl {
 /**
  * Initializes an EGL context for the given platform and remote display.
  * Will attempt to load all possibly required api functions.
- *
- * If config_attribs is NULL, the EGL config is not created.
  */
-struct wlr_egl *wlr_egl_create(EGLenum platform, void *remote_display,
-	const EGLint *config_attribs);
+struct wlr_egl *wlr_egl_create(EGLenum platform, void *remote_display);
 
 /**
  * Frees all related EGL resources, makes the context not-current and

render/egl.c

@@ -150,8 +150,7 @@ out:
 	free(formats);
 }
 
-struct wlr_egl *wlr_egl_create(EGLenum platform, void *remote_display,
-		const EGLint *config_attribs) {
+struct wlr_egl *wlr_egl_create(EGLenum platform, void *remote_display) {
 	struct wlr_egl *egl = calloc(1, sizeof(struct wlr_egl));
 	if (egl == NULL) {
 		wlr_log_errno(WLR_ERROR, "Allocation failed");
@@ -286,25 +285,11 @@ struct wlr_egl *wlr_egl_create(EGLenum platform, void *remote_display,
 			check_egl_ext(device_exts_str, "EGL_EXT_device_drm");
 	}
 
-	if (config_attribs != NULL) {
-		EGLint matched = 0;
-		if (!eglChooseConfig(egl->display, config_attribs, &egl->config, 1,
-				&matched)) {
-			wlr_log(WLR_ERROR, "eglChooseConfig failed");
-			goto error;
-		}
-		if (matched == 0) {
-			wlr_log(WLR_ERROR, "Failed to match an EGL config");
-			goto error;
-		}
-	} else {
-		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");
-			goto error;
-		}
-		egl->config = EGL_NO_CONFIG_KHR;
+	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");
+		goto error;
 	}
 
 	wlr_log(WLR_INFO, "Using EGL %d.%d", (int)major, (int)minor);
@@ -339,7 +324,7 @@ struct wlr_egl *wlr_egl_create(EGLenum platform, void *remote_display,
 	attribs[atti++] = EGL_NONE;
 	assert(atti <= sizeof(attribs)/sizeof(attribs[0]));
 
-	egl->context = eglCreateContext(egl->display, egl->config,
+	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");

render/gles2/renderer.c

@@ -466,9 +466,6 @@ static enum wl_shm_format gles2_preferred_read_format(
 		glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 			GL_RENDERBUFFER_ALPHA_SIZE, &alpha_size);
 		glBindRenderbuffer(GL_RENDERBUFFER, 0);
-	} else if (renderer->egl->config != EGL_NO_CONFIG_KHR) {
-		eglGetConfigAttrib(renderer->egl->display, renderer->egl->config,
-			EGL_ALPHA_SIZE, &alpha_size);
 	}
 
 	const struct wlr_gles2_pixel_format *fmt =

render/wlr_renderer.c

@@ -257,8 +257,7 @@ struct wlr_renderer *wlr_renderer_autocreate_with_drm_fd(int drm_fd) {
 		return NULL;
 	}
 
-	struct wlr_egl *egl = wlr_egl_create(EGL_PLATFORM_GBM_KHR, gbm_device,
-			NULL);
+	struct wlr_egl *egl = wlr_egl_create(EGL_PLATFORM_GBM_KHR, gbm_device);
 	if (egl == NULL) {
 		wlr_log(WLR_ERROR, "Could not initialize EGL");
 		gbm_device_destroy(gbm_device);