Use env helpers

backend/backend.c

@@ -17,6 +17,7 @@
 #include "backend/backend.h"
 #include "backend/multi.h"
 #include "render/allocator/allocator.h"
+#include "util/env.h"
 
 #if WLR_HAS_DRM_BACKEND
 #include <wlr/backend/drm.h>
@@ -364,8 +365,7 @@ struct wlr_backend *wlr_backend_autocreate(struct wl_display *display) {
 	}
 	wlr_multi_backend_add(backend, libinput);
 #else
-	const char *no_devs = getenv("WLR_LIBINPUT_NO_DEVICES");
+	if (env_parse_bool("WLR_LIBINPUT_NO_DEVICES")) {
-	if (no_devs && strcmp(no_devs, "1") == 0) {
 		wlr_log(WLR_INFO, "WLR_LIBINPUT_NO_DEVICES is set, "
 			"starting without libinput backend");
 	} else {

backend/drm/drm.c

@@ -29,6 +29,7 @@
 #include "render/drm_format_set.h"
 #include "render/swapchain.h"
 #include "render/wlr_renderer.h"
+#include "util/env.h"
 
 // Output state which needs a KMS commit to be applied
 static const uint32_t COMMIT_OUTPUT_STATE =
@@ -74,8 +75,7 @@ bool check_drm_features(struct wlr_drm_backend *drm) {
 		return false;
 	}
 
-	const char *no_atomic = getenv("WLR_DRM_NO_ATOMIC");
+	if (env_parse_bool("WLR_DRM_NO_ATOMIC")) {
-	if (no_atomic && strcmp(no_atomic, "1") == 0) {
 		wlr_log(WLR_DEBUG,
 			"WLR_DRM_NO_ATOMIC set, forcing legacy DRM interface");
 		drm->iface = &legacy_iface;
@@ -91,8 +91,7 @@ bool check_drm_features(struct wlr_drm_backend *drm) {
 	int ret = drmGetCap(drm->fd, DRM_CAP_TIMESTAMP_MONOTONIC, &cap);
 	drm->clock = (ret == 0 && cap == 1) ? CLOCK_MONOTONIC : CLOCK_REALTIME;
 
-	const char *no_modifiers = getenv("WLR_DRM_NO_MODIFIERS");
+	if (env_parse_bool("WLR_DRM_NO_MODIFIERS")) {
-	if (no_modifiers != NULL && strcmp(no_modifiers, "1") == 0) {
 		wlr_log(WLR_DEBUG, "WLR_DRM_NO_MODIFIERS set, disabling modifiers");
 	} else {
 		ret = drmGetCap(drm->fd, DRM_CAP_ADDFB2_MODIFIERS, &cap);

backend/libinput/backend.c

@@ -6,6 +6,7 @@
 #include <wlr/backend/session.h>
 #include <wlr/util/log.h>
 #include "backend/libinput.h"
+#include "util/env.h"
 
 static struct wlr_libinput_backend *get_libinput_backend_from_backend(
 		struct wlr_backend *wlr_backend) {
@@ -103,13 +104,8 @@ static bool backend_start(struct wlr_backend *wlr_backend) {
 	libinput_log_set_priority(backend->libinput_context, LIBINPUT_LOG_PRIORITY_ERROR);
 
 	int libinput_fd = libinput_get_fd(backend->libinput_context);
-	char *no_devs = getenv("WLR_LIBINPUT_NO_DEVICES");
+
-	if (no_devs) {
+	if (!env_parse_bool("WLR_LIBINPUT_NO_DEVICES") && wl_list_empty(&backend->devices)) {
-		if (strcmp(no_devs, "1") != 0) {
-			no_devs = NULL;
-		}
-	}
-	if (!no_devs && wl_list_empty(&backend->devices)) {
 		handle_libinput_readable(libinput_fd, WL_EVENT_READABLE, backend);
 		if (wl_list_empty(&backend->devices)) {
 			wlr_log(WLR_ERROR, "libinput initialization failed, no input devices");

render/egl.c

@@ -11,6 +11,7 @@
 #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) {
@@ -284,8 +285,7 @@ static bool egl_init_display(struct wlr_egl *egl, EGLDisplay *display) {
 		}
 
 		if (check_egl_ext(device_exts_str, "EGL_MESA_device_software")) {
-			const char *allow_software = getenv("WLR_RENDERER_ALLOW_SOFTWARE");
+			if (env_parse_bool("WLR_RENDERER_ALLOW_SOFTWARE")) {
-			if (allow_software != NULL && strcmp(allow_software, "1") == 0) {
 				wlr_log(WLR_INFO, "Using software rendering");
 			} else {
 				wlr_log(WLR_ERROR, "Software rendering detected, please use "

render/wlr_renderer.c

@@ -28,6 +28,7 @@
 #include "backend/backend.h"
 #include "render/pixel_format.h"
 #include "render/wlr_renderer.h"
+#include "util/env.h"
 
 void wlr_renderer_init(struct wlr_renderer *renderer,
 		const struct wlr_renderer_impl *impl) {
@@ -266,54 +267,65 @@ bool wlr_renderer_init_wl_display(struct wlr_renderer *r,
 	return true;
 }
 
+static void log_creation_failure(bool is_auto, const char *msg) {
+	wlr_log(is_auto ? WLR_DEBUG : WLR_ERROR, "%s%s", msg, is_auto ? ". Skipping!" : "");
+}
+
 struct wlr_renderer *renderer_autocreate_with_drm_fd(int drm_fd) {
-	const char *name = getenv("WLR_RENDERER");
+	const char *renderer_options[] = {
-	if (name) {
+		"auto",
-		wlr_log(WLR_INFO, "Loading user-specified renderer due to WLR_RENDERER: %s",
+#if WLR_HAS_GLES2_RENDERER
-			name);
+		"gles2",
+#endif
+#if WLR_HAS_VULKAN_RENDERER
+		"vulkan",
+#endif
+		"pixman",
+		NULL
+	};
+
+	const char *renderer_name = renderer_options[env_parse_switch("WLR_RENDERER", renderer_options)];
+	bool is_auto = strcmp(renderer_name, "auto") == 0;
+	struct wlr_renderer *renderer = NULL;
 
 #if WLR_HAS_GLES2_RENDERER
-		if (strcmp(name, "gles2") == 0) {
+	if (!renderer && (is_auto || strcmp(renderer_name, "gles2") == 0)) {
-			if (drm_fd < 0) {
+		if (drm_fd < 0) {
-				wlr_log(WLR_ERROR, "Cannot create GLES2 renderer: "
+			log_creation_failure(is_auto, "Cannot create GLES2 renderer: no DRM FD available");
-					"no DRM FD available");
+		} else {
-				return NULL;
+			renderer = wlr_gles2_renderer_create_with_drm_fd(drm_fd);
+			if (!renderer) {
+				log_creation_failure(is_auto, "Failed to create a GLES2 renderer");
 			}
-			return wlr_gles2_renderer_create_with_drm_fd(drm_fd);
 		}
+	}
 #endif
+
 #if WLR_HAS_VULKAN_RENDERER
-		if (strcmp(name, "vulkan") == 0) {
+	if (!renderer && (is_auto || strcmp(renderer_name, "vulkan") == 0)) {
-			return wlr_vk_renderer_create_with_drm_fd(drm_fd);
+		if (drm_fd < 0) {
-		}
+			log_creation_failure(is_auto, "Cannot create Vulkan renderer: no DRM FD available");
-#endif
+		} else {
-		if (strcmp(name, "pixman") == 0) {
+			renderer = wlr_vk_renderer_create_with_drm_fd(drm_fd);
-			return wlr_pixman_renderer_create();
+			if (!renderer) { 
+				log_creation_failure(is_auto, "Failed to create a Vulkan renderer");
+			}
 		}
-
-		wlr_log(WLR_ERROR, "Invalid WLR_RENDERER value: '%s'", name);
-		return NULL;
 	}
+#endif
 
-	struct wlr_renderer *renderer = NULL;
+	if (!renderer && (is_auto || strcmp(renderer_name, "pixman") == 0)) {
-#if WLR_HAS_GLES2_RENDERER
+		renderer = wlr_pixman_renderer_create();
-	if (drm_fd >= 0) {
+		if (!renderer) { 
-		if ((renderer = wlr_gles2_renderer_create_with_drm_fd(drm_fd)) != NULL) {
+			log_creation_failure(is_auto, "Failed to create a pixman renderer");
-			return renderer;
 		}
-		wlr_log(WLR_DEBUG, "Failed to create GLES2 renderer");
-	} else {
-		wlr_log(WLR_DEBUG, "Skipping GLES2 renderer: no DRM FD available");
 	}
-#endif
 
-	if ((renderer = wlr_pixman_renderer_create()) != NULL) {
+	if (!renderer) {
-		return renderer;
+		wlr_log(WLR_ERROR, "Could not initialize renderer");
 	}
-	wlr_log(WLR_DEBUG, "Failed to create pixman renderer");
 
-	wlr_log(WLR_ERROR, "Could not initialize renderer");
+	return renderer;
-	return NULL;
 }
 
 static int open_drm_render_node(void) {

types/output/output.c

@@ -10,6 +10,7 @@
 #include "render/allocator/allocator.h"
 #include "render/swapchain.h"
 #include "types/wlr_output.h"
+#include "util/env.h"
 #include "util/global.h"
 
 #define OUTPUT_VERSION 4
@@ -366,11 +367,9 @@ void wlr_output_init(struct wlr_output *output, struct wlr_backend *backend,
 	wl_signal_init(&output->events.destroy);
 	output_state_init(&output->pending);
 
-	const char *no_hardware_cursors = getenv("WLR_NO_HARDWARE_CURSORS");
+	output->software_cursor_locks = env_parse_bool("WLR_NO_HARDWARE_CURSORS");
-	if (no_hardware_cursors != NULL && strcmp(no_hardware_cursors, "1") == 0) {
+	if (output->software_cursor_locks) {
-		wlr_log(WLR_DEBUG,
+		wlr_log(WLR_DEBUG, "WLR_NO_HARDWARE_CURSORS set, forcing software cursors");
-			"WLR_NO_HARDWARE_CURSORS set, forcing software cursors");
-		output->software_cursor_locks = 1;
 	}
 
 	wlr_addon_set_init(&output->addons);

types/scene/wlr_scene.c

@@ -14,6 +14,7 @@
 #include "types/wlr_buffer.h"
 #include "types/wlr_scene.h"
 #include "util/array.h"
+#include "util/env.h"
 #include "util/time.h"
 
 #define HIGHLIGHT_DAMAGE_FADEOUT_TIME 250
@@ -150,49 +151,16 @@ struct wlr_scene *wlr_scene_create(void) {
 	wl_list_init(&scene->outputs);
 	wl_list_init(&scene->presentation_destroy.link);
 
-	char *debug_damage = getenv("WLR_SCENE_DEBUG_DAMAGE");
+	const char *debug_damage_options[] = {
-	if (debug_damage) {
+		"none",
-		wlr_log(WLR_INFO, "Loading WLR_SCENE_DEBUG_DAMAGE option: %s", debug_damage);
+		"rerender",
-	}
+		"highlight",
-
+		NULL
-	if (!debug_damage || strcmp(debug_damage, "none") == 0) {
+	};
-		scene->debug_damage_option = WLR_SCENE_DEBUG_DAMAGE_NONE;
-	} else if (strcmp(debug_damage, "rerender") == 0) {
-		scene->debug_damage_option = WLR_SCENE_DEBUG_DAMAGE_RERENDER;
-	} else if (strcmp(debug_damage, "highlight") == 0) {
-		scene->debug_damage_option = WLR_SCENE_DEBUG_DAMAGE_HIGHLIGHT;
-	} else {
-		wlr_log(WLR_ERROR, "Unknown WLR_SCENE_DEBUG_DAMAGE option: %s", debug_damage);
-		scene->debug_damage_option = WLR_SCENE_DEBUG_DAMAGE_NONE;
-	}
-
-	char *disable_direct_scanout = getenv("WLR_SCENE_DISABLE_DIRECT_SCANOUT");
-	if (disable_direct_scanout) {
-		wlr_log(WLR_INFO, "Loading WLR_SCENE_DISABLE_DIRECT_SCANOUT option: %s", disable_direct_scanout);
-	}
-
-	if (!disable_direct_scanout || strcmp(disable_direct_scanout, "0") == 0) {
-		scene->direct_scanout = true;
-	} else if (strcmp(disable_direct_scanout, "1") == 0) {
-		scene->direct_scanout = false;
-	} else {
-		wlr_log(WLR_ERROR, "Unknown WLR_SCENE_DISABLE_DIRECT_SCANOUT option: %s", disable_direct_scanout);
-		scene->direct_scanout = true;
-	}
-
-	char *visibility_disabled = getenv("WLR_SCENE_DISABLE_VISIBILITY");
-	if (visibility_disabled) {
-		wlr_log(WLR_INFO, "Loading WLR_SCENE_DISABLE_VISIBILITY option: %s", visibility_disabled);
-	}
 
-	if (!visibility_disabled || strcmp(visibility_disabled, "0") == 0) {
+	scene->debug_damage_option = env_parse_switch("WLR_SCENE_DEBUG_DAMAGE", debug_damage_options);
-		scene->calculate_visibility = true;
+	scene->direct_scanout = !env_parse_bool("WLR_SCENE_DISABLE_DIRECT_SCANOUT");
-	} else if (strcmp(visibility_disabled, "1") == 0) {
+	scene->calculate_visibility = !env_parse_bool("WLR_SCENE_DISABLE_VISIBILITY");
-		scene->calculate_visibility = false;
-	} else {
-		wlr_log(WLR_ERROR, "Unknown WLR_SCENE_DISABLE_VISIBILITY option: %s", visibility_disabled);
-		scene->calculate_visibility = true;
-	}
 
 	return scene;
 }