render: make GLES2 renderer optional

Allow selecting whether the GLES2 renderer gets enabled.

Co-authored-by: Simon Ser <contact@emersion.fr>

examples/meson.build

@@ -23,6 +23,11 @@ if libavutil.found() and not cc.has_header('libavutil/hwcontext_drm.h', dependen
 	libavutil = disabler()
 endif
 
+wlr_gles2_renderer = []
+if not features['gles2-renderer']
+	wlr_gles2_renderer = disabler()
+endif
+
 compositors = {
 	'simple': {
 		'src': 'simple.c',
@@ -32,18 +37,23 @@ compositors = {
 	},
 	'touch': {
 		'src': ['touch.c', 'cat.c'],
+		'dep': [wlr_gles2_renderer],
 	},
 	'tablet': {
 		'src': 'tablet.c',
+		'dep': [wlr_gles2_renderer],
 	},
 	'rotation': {
 		'src': ['rotation.c', 'cat.c'],
+		'dep': [wlr_gles2_renderer],
 	},
 	'multi-pointer': {
 		'src': 'multi-pointer.c',
+		'dep': [wlr_gles2_renderer],
 	},
 	'output-layout': {
 		'src': ['output-layout.c', 'cat.c'],
+		'dep': [wlr_gles2_renderer],
 	},
 	'fullscreen-shell': {
 		'src': 'fullscreen-shell.c',
@@ -193,7 +203,7 @@ foreach name, info : compositors
 	executable(
 		name,
 		[info.get('src'), extra_src],
-		dependencies: [wlroots, libdrm],
+		dependencies: [wlroots, libdrm, info.get('dep', [])],
 		include_directories: [wlr_inc, proto_inc],
 		build_by_default: get_option('examples'),
 	)

include/meson.build

@@ -9,6 +9,9 @@ if not features.get('xwayland')
 else
 	subdir('xwayland')
 endif
+if not features.get('gles2-renderer')
+	exclude_files += ['render/egl.h', 'render/gles2.h']
+endif
 
 install_subdir('wlr',
 	install_dir: get_option('includedir'),

include/wlr/config.h.in

@@ -3,6 +3,8 @@
 
 #mesondefine WLR_HAS_X11_BACKEND
 
+#mesondefine WLR_HAS_GLES2_RENDERER
+
 #mesondefine WLR_HAS_XWAYLAND
 
 #endif

meson.build

@@ -88,6 +88,7 @@ endif
 features = {
 	'x11-backend': false,
 	'xwayland': false,
+	'gles2-renderer': false,
 }
 internal_features = {
 	'xcb-errors': false,
@@ -96,8 +97,6 @@ internal_features = {
 wayland_server = dependency('wayland-server', version: '>=1.19')
 wayland_client = dependency('wayland-client')
 wayland_protos = dependency('wayland-protocols', version: '>=1.17')
-egl = dependency('egl')
-glesv2 = dependency('glesv2')
 drm = dependency('libdrm', version: '>=2.4.95')
 gbm = dependency('gbm', version: '>=17.1.0')
 libinput = dependency('libinput', version: '>=1.14.0')
@@ -113,8 +112,6 @@ wlr_deps = [
 	wayland_server,
 	wayland_client,
 	wayland_protos,
-	egl,
-	glesv2,
 	drm,
 	gbm,
 	libinput,

meson_options.txt

@@ -3,3 +3,4 @@ option('xwayland', type: 'feature', value: 'auto', yield: true, description: 'En
 option('x11-backend', type: 'feature', value: 'auto', description: 'Enable X11 backend')
 option('examples', type: 'boolean', value: true, description: 'Build example applications')
 option('icon_directory', description: 'Location used to look for cursors (default: ${datadir}/icons)', type: 'string', value: '')
+option('renderers', type: 'array', choices: ['auto', 'gles2'], value: ['auto'], description: 'Select built-in renderers')

render/gles2/meson.build

@@ -1,3 +1,12 @@
+glesv2 = dependency('glesv2', required: 'gles2' in renderers)
+
+if not (glesv2.found() and egl.found())
+	subdir_done()
+endif
+
+features += { 'gles2-renderer': true }
+wlr_deps += glesv2
+
 wlr_files += files(
 	'pixel_format.c',
 	'renderer.c',

render/meson.build

@@ -1,7 +1,13 @@
+renderers = get_option('renderers')
+if 'auto' in renderers and get_option('auto_features').enabled()
+	renderers = ['gles2']
+elif 'auto' in renderers and get_option('auto_features').disabled()
+	renderers = []
+endif
+
 wlr_files += files(
 	'allocator.c',
 	'dmabuf.c',
-	'egl.c',
 	'drm_format_set.c',
 	'gbm_allocator.c',
 	'pixel_format.c',
@@ -11,5 +17,14 @@ wlr_files += files(
 	'wlr_texture.c',
 )
 
-subdir('gles2')
+egl = dependency('egl', required: 'gles2' in renderers)
+if egl.found()
+	wlr_deps += egl
+	wlr_files += files('egl.c')
+endif
+
+if 'gles2' in renderers or 'auto' in renderers
+	subdir('gles2')
+endif
+
 subdir('pixman')

render/pixman/meson.build

@@ -1,4 +1,5 @@
 pixman = dependency('pixman-1')
+
 wlr_deps += pixman
 
 wlr_files += files(

render/wlr_renderer.c

@@ -2,13 +2,19 @@
 #include <stdbool.h>
 #include <stdlib.h>
 #include <gbm.h>
-#include <wlr/render/egl.h>
-#include <wlr/render/gles2.h>
-#include <wlr/render/pixman.h>
 #include <wlr/render/interface.h>
+#include <wlr/render/pixman.h>
 #include <wlr/render/wlr_renderer.h>
 #include <wlr/types/wlr_matrix.h>
 #include <wlr/util/log.h>
+
+#include <wlr/config.h>
+
+#if WLR_HAS_GLES2_RENDERER
+#include <wlr/render/egl.h>
+#include <wlr/render/gles2.h>
+#endif
+
 #include "util/signal.h"
 #include "render/pixel_format.h"
 #include "render/wlr_renderer.h"
@@ -222,6 +228,7 @@ bool wlr_renderer_init_wl_display(struct wlr_renderer *r,
 }
 
 struct wlr_renderer *wlr_renderer_autocreate_with_drm_fd(int drm_fd) {
+#if WLR_HAS_GLES2_RENDERER
 	struct gbm_device *gbm_device = gbm_create_device(drm_fd);
 	if (!gbm_device) {
 		wlr_log(WLR_ERROR, "Failed to create GBM device");
@@ -241,9 +248,14 @@ struct wlr_renderer *wlr_renderer_autocreate_with_drm_fd(int drm_fd) {
 	if (!renderer) {
 		wlr_log(WLR_ERROR, "Failed to create GLES2 renderer");
 		wlr_egl_destroy(egl);
+		return NULL;
 	}
 
 	return renderer;
+#endif
+
+	wlr_log(WLR_ERROR, "Failed to initialize any renderer");
+	return NULL;
 }
 
 struct wlr_renderer *wlr_renderer_autocreate(struct wlr_backend *backend) {