Merge branch 'xwayland' into 'master'

xwayland: don't ping if client not supports

See merge request wlroots/wlroots!5103

.builds/archlinux.yml

@@ -41,9 +41,10 @@ tasks:
       cd wlroots/build-gcc/tinywl
       sudo modprobe vkms
       udevadm settle
+      card="/dev/dri/$(ls /sys/devices/faux/vkms/drm/ | grep ^card)"
       export WLR_BACKENDS=drm
       export WLR_RENDERER=pixman
-      export WLR_DRM_DEVICES=/dev/dri/by-path/platform-vkms-card
+      export WLR_DRM_DEVICES="$card"
       export UBSAN_OPTIONS=halt_on_error=1
-      sudo chmod ugo+rw /dev/dri/by-path/platform-vkms-card
+      sudo chmod ugo+rw "$card"
       sudo -E seatd-launch -- ./tinywl -s 'kill $PPID' || [ $? = 143 ]

backend/session/session.c

@@ -519,8 +519,6 @@ ssize_t wlr_session_find_gpus(struct wlr_session *session,
 			break;
 		}
 
-		bool is_boot_vga = false;
-
 		const char *path = udev_list_entry_get_name(entry);
 		struct udev_device *dev = udev_device_new_from_syspath(session->udev, path);
 		if (!dev) {
@@ -536,14 +534,20 @@ ssize_t wlr_session_find_gpus(struct wlr_session *session,
 			continue;
 		}
 
-		// This is owned by 'dev', so we don't need to free it
-		struct udev_device *pci =
-			udev_device_get_parent_with_subsystem_devtype(dev, "pci", NULL);
+		bool is_primary = false;
+		const char *boot_display = udev_device_get_sysattr_value(dev, "boot_display");
+		if (boot_display && strcmp(boot_display, "1") == 0) {
+		    is_primary = true;
+		} else {
+			// This is owned by 'dev', so we don't need to free it
+			struct udev_device *pci =
+				udev_device_get_parent_with_subsystem_devtype(dev, "pci", NULL);
 
-		if (pci) {
-			const char *id = udev_device_get_sysattr_value(pci, "boot_vga");
-			if (id && strcmp(id, "1") == 0) {
-				is_boot_vga = true;
+			if (pci) {
+				const char *id = udev_device_get_sysattr_value(pci, "boot_vga");
+				if (id && strcmp(id, "1") == 0) {
+					is_primary = true;
+				}
 			}
 		}
 
@@ -557,7 +561,7 @@ ssize_t wlr_session_find_gpus(struct wlr_session *session,
 		udev_device_unref(dev);
 
 		ret[i] = wlr_dev;
-		if (is_boot_vga) {
+		if (is_primary) {
 			struct wlr_device *tmp = ret[0];
 			ret[0] = ret[i];
 			ret[i] = tmp;

include/render/color.h

@@ -9,6 +9,7 @@ enum wlr_color_transform_type {
 	COLOR_TRANSFORM_INVERSE_EOTF,
 	COLOR_TRANSFORM_LCMS2,
 	COLOR_TRANSFORM_LUT_3X1D,
+	COLOR_TRANSFORM_PIPELINE,
 };
 
 struct wlr_color_transform {
@@ -39,6 +40,13 @@ struct wlr_color_transform_lut_3x1d {
 	size_t dim;
 };
 
+struct wlr_color_transform_pipeline {
+	struct wlr_color_transform base;
+
+	struct wlr_color_transform **transforms;
+	size_t len;
+};
+
 void wlr_color_transform_init(struct wlr_color_transform *tr,
 	enum wlr_color_transform_type type);
 
@@ -72,12 +80,6 @@ struct wlr_color_transform_inverse_eotf *wlr_color_transform_inverse_eotf_from_b
 struct wlr_color_transform_lut_3x1d *color_transform_lut_3x1d_from_base(
 	struct wlr_color_transform *tr);
 
-/**
- * Evaluate a 3x1D LUT color transform for a given RGB triplet.
- */
-void color_transform_lut_3x1d_eval(struct wlr_color_transform_lut_3x1d *tr,
-	float out[static 3], const float in[static 3]);
-
 /**
  * Obtain primaries values from a well-known primaries name.
  */

include/wlr/render/color.h

@@ -141,6 +141,13 @@ struct wlr_color_transform *wlr_color_transform_init_linear_to_inverse_eotf(
 struct wlr_color_transform *wlr_color_transform_init_lut_3x1d(size_t dim,
 	const uint16_t *r, const uint16_t *g, const uint16_t *b);
 
+/**
+ * Initialize a color transformation to apply a sequence of color transforms
+ * one after another.
+ */
+struct wlr_color_transform *wlr_color_transform_init_pipeline(
+	struct wlr_color_transform **transforms, size_t len);
+
 /**
  * Increase the reference count of the color transform by 1.
  */
@@ -152,4 +159,10 @@ struct wlr_color_transform *wlr_color_transform_ref(struct wlr_color_transform *
  */
 void wlr_color_transform_unref(struct wlr_color_transform *tr);
 
+/**
+ * Evaluate a color transform for a given RGB triplet.
+ */
+void wlr_color_transform_eval(struct wlr_color_transform *tr,
+	float out[static 3], const float in[static 3]);
+
 #endif

include/wlr/types/wlr_gamma_control_v1.h

@@ -10,6 +10,11 @@ struct wlr_gamma_control_manager_v1 {
 	struct wl_global *global;
 	struct wl_list controls; // wlr_gamma_control_v1.link
 
+	// Fallback to use when an struct wlr_output doesn't support gamma LUTs.
+	// Can be used to apply gamma LUTs via a struct wlr_renderer. Leave zero to
+	// indicate that the fallback is unsupported.
+	size_t fallback_gamma_size;
+
 	struct {
 		struct wl_signal destroy;
 		struct wl_signal set_gamma; // struct wlr_gamma_control_manager_v1_set_gamma_event
@@ -49,6 +54,8 @@ struct wlr_gamma_control_v1 *wlr_gamma_control_manager_v1_get_control(
 	struct wlr_gamma_control_manager_v1 *manager, struct wlr_output *output);
 bool wlr_gamma_control_v1_apply(struct wlr_gamma_control_v1 *gamma_control,
 	struct wlr_output_state *output_state);
+struct wlr_color_transform *wlr_gamma_control_v1_get_color_transform(
+	struct wlr_gamma_control_v1 *gamma_control);
 void wlr_gamma_control_v1_send_failed_and_destroy(struct wlr_gamma_control_v1 *gamma_control);
 
 #endif

include/wlr/types/wlr_output.h

@@ -267,6 +267,7 @@ struct wlr_output {
 	struct {
 		struct wl_listener display_destroy;
 		struct wlr_output_image_description image_description_value;
+		struct wlr_color_transform *color_transform;
 	} WLR_PRIVATE;
 };
 

include/wlr/types/wlr_scene.h

@@ -252,6 +252,11 @@ struct wlr_scene_output {
 
 		bool gamma_lut_changed;
 		struct wlr_gamma_control_v1 *gamma_lut;
+		struct wlr_color_transform *gamma_lut_color_transform;
+
+		struct wlr_color_transform *prev_gamma_lut_color_transform;
+		struct wlr_color_transform *prev_supplied_color_transform;
+		struct wlr_color_transform *prev_combined_color_transform;
 
 		struct wl_listener output_commit;
 		struct wl_listener output_damage;

include/xwayland/xwm.h

@@ -164,6 +164,7 @@ struct wlr_xwm {
 	struct wl_listener drop_focus_destroy;
 };
 
+// xwm_create takes ownership of wm_fd and will close it under all circumstances.
 struct wlr_xwm *xwm_create(struct wlr_xwayland *wlr_xwayland, int wm_fd);
 
 void xwm_destroy(struct wlr_xwm *xwm);

render/color.c

@@ -62,6 +62,33 @@ struct wlr_color_transform *wlr_color_transform_init_lut_3x1d(size_t dim,
 	return &tx->base;
 }
 
+struct wlr_color_transform *wlr_color_transform_init_pipeline(
+		struct wlr_color_transform **transforms, size_t len) {
+	assert(len > 0);
+
+	struct wlr_color_transform **copy = calloc(len, sizeof(copy[0]));
+	if (copy == NULL) {
+		return NULL;
+	}
+
+	struct wlr_color_transform_pipeline *tx = calloc(1, sizeof(*tx));
+	if (!tx) {
+		free(copy);
+		return NULL;
+	}
+	wlr_color_transform_init(&tx->base, COLOR_TRANSFORM_PIPELINE);
+
+	// TODO: flatten nested pipeline transforms
+	for (size_t i = 0; i < len; i++) {
+		copy[i] = wlr_color_transform_ref(transforms[i]);
+	}
+
+	tx->transforms = copy;
+	tx->len = len;
+
+	return &tx->base;
+}
+
 static void color_transform_destroy(struct wlr_color_transform *tr) {
 	switch (tr->type) {
 	case COLOR_TRANSFORM_INVERSE_EOTF:
@@ -73,6 +100,14 @@ static void color_transform_destroy(struct wlr_color_transform *tr) {
 		struct wlr_color_transform_lut_3x1d *lut_3x1d = color_transform_lut_3x1d_from_base(tr);
 		free(lut_3x1d->lut_3x1d);
 		break;
+	case COLOR_TRANSFORM_PIPELINE:;
+		struct wlr_color_transform_pipeline *pipeline =
+			wl_container_of(tr, pipeline, base);
+		for (size_t i = 0; i < pipeline->len; i++) {
+			wlr_color_transform_unref(pipeline->transforms[i]);
+		}
+		free(pipeline->transforms);
+		break;
 	}
 	wlr_addon_set_finish(&tr->addons);
 	free(tr);
@@ -108,6 +143,65 @@ struct wlr_color_transform_lut_3x1d *color_transform_lut_3x1d_from_base(
 	return lut_3x1d;
 }
 
+static float srgb_eval_inverse_eotf(float x) {
+	// See https://www.w3.org/Graphics/Color/srgb
+	if (x <= 0.0031308) {
+		return 12.92 * x;
+	} else {
+		return 1.055 * powf(x, 1.0 / 2.4) - 0.055;
+	}
+}
+
+static float st2084_pq_eval_inverse_eotf(float x) {
+	// H.273 TransferCharacteristics code point 16
+	float c1 = 0.8359375;
+	float c2 = 18.8515625;
+	float c3 = 18.6875;
+	float m = 78.84375;
+	float n = 0.1593017578125;
+	if (x < 0) {
+		x = 0;
+	}
+	if (x > 1) {
+		x = 1;
+	}
+	float pow_n = powf(x, n);
+	return powf((c1 + c2 * pow_n) / (1 + c3 * pow_n), m);
+}
+
+static float bt1886_eval_inverse_eotf(float x) {
+	float lb = powf(0.0001, 1.0 / 2.4);
+	float lw = powf(1.0, 1.0 / 2.4);
+	float a  = powf(lw - lb, 2.4);
+	float b  = lb / (lw - lb);
+	return powf(x / a, 1.0 / 2.4) - b;
+}
+
+static float transfer_function_eval_inverse_eotf(
+		enum wlr_color_transfer_function tf, float x) {
+	switch (tf) {
+	case WLR_COLOR_TRANSFER_FUNCTION_SRGB:
+		return srgb_eval_inverse_eotf(x);
+	case WLR_COLOR_TRANSFER_FUNCTION_ST2084_PQ:
+		return st2084_pq_eval_inverse_eotf(x);
+	case WLR_COLOR_TRANSFER_FUNCTION_EXT_LINEAR:
+		return x;
+	case WLR_COLOR_TRANSFER_FUNCTION_GAMMA22:
+		return powf(x, 1.0 / 2.2);
+	case WLR_COLOR_TRANSFER_FUNCTION_BT1886:
+		return bt1886_eval_inverse_eotf(x);
+	}
+	abort(); // unreachable
+}
+
+static void color_transform_inverse_eotf_eval(
+		struct wlr_color_transform_inverse_eotf *tr,
+		float out[static 3], const float in[static 3]) {
+	for (size_t i = 0; i < 3; i++) {
+		out[i] = transfer_function_eval_inverse_eotf(tr->tf, in[i]);
+	}
+}
+
 static float lut_1d_get(const uint16_t *lut, size_t len, size_t i) {
 	if (i >= len) {
 		i = len - 1;
@@ -125,13 +219,38 @@ static float lut_1d_eval(const uint16_t *lut, size_t len, float x) {
 	return a * (1 - frac_part) + b * frac_part;
 }
 
-void color_transform_lut_3x1d_eval(struct wlr_color_transform_lut_3x1d *tr,
+static void color_transform_lut_3x1d_eval(struct wlr_color_transform_lut_3x1d *tr,
 		float out[static 3], const float in[static 3]) {
 	for (size_t i = 0; i < 3; i++) {
 		out[i] = lut_1d_eval(&tr->lut_3x1d[tr->dim * i], tr->dim, in[i]);
 	}
 }
 
+void wlr_color_transform_eval(struct wlr_color_transform *tr,
+		float out[static 3], const float in[static 3]) {
+	switch (tr->type) {
+	case COLOR_TRANSFORM_INVERSE_EOTF:
+		color_transform_inverse_eotf_eval(wlr_color_transform_inverse_eotf_from_base(tr), out, in);
+		break;
+	case COLOR_TRANSFORM_LCMS2:
+		color_transform_lcms2_eval(color_transform_lcms2_from_base(tr), out, in);
+		break;
+	case COLOR_TRANSFORM_LUT_3X1D:
+		color_transform_lut_3x1d_eval(color_transform_lut_3x1d_from_base(tr), out, in);
+		break;
+	case COLOR_TRANSFORM_PIPELINE:;
+		struct wlr_color_transform_pipeline *pipeline =
+			wl_container_of(tr, pipeline, base);
+		float color[3];
+		memcpy(color, in, sizeof(color));
+		for (size_t i = 0; i < pipeline->len; i++) {
+			wlr_color_transform_eval(pipeline->transforms[i], color, color);
+		}
+		memcpy(out, color, sizeof(color));
+		break;
+	}
+}
+
 void wlr_color_primaries_from_named(struct wlr_color_primaries *out,
 		enum wlr_color_named_primaries named) {
 	switch (named) {

render/vulkan/pass.c

@@ -964,19 +964,6 @@ static bool create_3d_lut_image(struct wlr_vk_renderer *renderer,
 	*ds = VK_NULL_HANDLE;
 	*ds_pool = NULL;
 
-	struct wlr_color_transform_lcms2 *tr_lcms2 = NULL;
-	struct wlr_color_transform_lut_3x1d *tr_lut_3x1d = NULL;
-	switch (tr->type) {
-	case COLOR_TRANSFORM_INVERSE_EOTF:
-		abort(); // unreachable
-	case COLOR_TRANSFORM_LCMS2:
-		tr_lcms2 = color_transform_lcms2_from_base(tr);
-		break;
-	case COLOR_TRANSFORM_LUT_3X1D:
-		tr_lut_3x1d = color_transform_lut_3x1d_from_base(tr);
-		break;
-	}
-
 	// R32G32B32 is not a required Vulkan format
 	// TODO: use it when available
 	VkFormat format = VK_FORMAT_R32G32B32A32_SFLOAT;
@@ -1074,11 +1061,7 @@ static bool create_3d_lut_image(struct wlr_vk_renderer *renderer,
 					b_index * sample_range,
 				};
 				float rgb_out[3];
-				if (tr_lcms2 != NULL) {
-					color_transform_lcms2_eval(tr_lcms2, rgb_out, rgb_in);
-				} else {
-					color_transform_lut_3x1d_eval(tr_lut_3x1d, rgb_out, rgb_in);
-				}
+				wlr_color_transform_eval(tr, rgb_out, rgb_in);
 
 				dst[dst_offset] = rgb_out[0];
 				dst[dst_offset + 1] = rgb_out[1];

types/output/output.c

@@ -242,6 +242,15 @@ static void output_apply_state(struct wlr_output *output,
 		}
 	}
 
+	if (state->committed & WLR_OUTPUT_STATE_COLOR_TRANSFORM) {
+		wlr_color_transform_unref(output->color_transform);
+		if (state->color_transform != NULL) {
+			output->color_transform = wlr_color_transform_ref(state->color_transform);
+		} else {
+			output->color_transform = NULL;
+		}
+	}
+
 	bool geometry_updated = state->committed &
 		(WLR_OUTPUT_STATE_MODE | WLR_OUTPUT_STATE_TRANSFORM |
 		WLR_OUTPUT_STATE_SUBPIXEL);
@@ -407,6 +416,7 @@ void wlr_output_finish(struct wlr_output *output) {
 
 	wlr_swapchain_destroy(output->cursor_swapchain);
 	wlr_buffer_unlock(output->cursor_front_buffer);
+	wlr_color_transform_unref(output->color_transform);
 
 	wlr_swapchain_destroy(output->swapchain);
 
@@ -515,8 +525,7 @@ const struct wlr_output_image_description *output_pending_image_description(
  * Returns a bitfield of the unchanged fields.
  *
  * Some fields are not checked: damage always changes in-between frames, the
- * gamma LUT is too expensive to check, the contents of the buffer might have
- * changed, etc.
+ * contents of the buffer might have changed, etc.
  */
 static uint32_t output_compare_state(struct wlr_output *output,
 		const struct wlr_output_state *state) {
@@ -562,6 +571,10 @@ static uint32_t output_compare_state(struct wlr_output *output,
 			output->subpixel == state->subpixel) {
 		fields |= WLR_OUTPUT_STATE_SUBPIXEL;
 	}
+	if ((state->committed & WLR_OUTPUT_STATE_COLOR_TRANSFORM) &&
+			output->color_transform == state->color_transform) {
+		fields |= WLR_OUTPUT_STATE_COLOR_TRANSFORM;
+	}
 	return fields;
 }
 

types/scene/wlr_scene.c

@@ -1530,6 +1530,8 @@ static void scene_handle_gamma_control_manager_v1_set_gamma(struct wl_listener *
 
 	output->gamma_lut_changed = true;
 	output->gamma_lut = event->control;
+	wlr_color_transform_unref(output->gamma_lut_color_transform);
+	output->gamma_lut_color_transform = wlr_gamma_control_v1_get_color_transform(event->control);
 	wlr_output_schedule_frame(output->output);
 }
 
@@ -1547,6 +1549,8 @@ static void scene_handle_gamma_control_manager_v1_destroy(struct wl_listener *li
 	wl_list_for_each(output, &scene->outputs, link) {
 		output->gamma_lut_changed = false;
 		output->gamma_lut = NULL;
+		wlr_color_transform_unref(output->gamma_lut_color_transform);
+		output->gamma_lut_color_transform = NULL;
 	}
 }
 
@@ -1766,6 +1770,10 @@ void wlr_scene_output_destroy(struct wlr_scene_output *scene_output) {
 	wl_list_remove(&scene_output->output_damage.link);
 	wl_list_remove(&scene_output->output_needs_frame.link);
 	wlr_drm_syncobj_timeline_unref(scene_output->in_timeline);
+	wlr_color_transform_unref(scene_output->gamma_lut_color_transform);
+	wlr_color_transform_unref(scene_output->prev_gamma_lut_color_transform);
+	wlr_color_transform_unref(scene_output->prev_supplied_color_transform);
+	wlr_color_transform_unref(scene_output->prev_combined_color_transform);
 	wl_array_release(&scene_output->render_list);
 	free(scene_output);
 }
@@ -2104,16 +2112,15 @@ static void scene_output_state_attempt_gamma(struct wlr_scene_output *scene_outp
 		return;
 	}
 
-	if (!wlr_gamma_control_v1_apply(scene_output->gamma_lut, &gamma_pending)) {
-		wlr_output_state_finish(&gamma_pending);
-		return;
-	}
-
+	wlr_output_state_set_color_transform(&gamma_pending, scene_output->gamma_lut_color_transform);
 	scene_output->gamma_lut_changed = false;
+
 	if (!wlr_output_test_state(scene_output->output, &gamma_pending)) {
 		wlr_gamma_control_v1_send_failed_and_destroy(scene_output->gamma_lut);
 
 		scene_output->gamma_lut = NULL;
+		wlr_color_transform_unref(scene_output->gamma_lut_color_transform);
+		scene_output->gamma_lut_color_transform = NULL;
 		wlr_output_state_finish(&gamma_pending);
 		return;
 	}
@@ -2122,6 +2129,41 @@ static void scene_output_state_attempt_gamma(struct wlr_scene_output *scene_outp
 	wlr_output_state_finish(&gamma_pending);
 }
 
+static struct wlr_color_transform *scene_output_combine_color_transforms(
+		struct wlr_scene_output *scene_output, struct wlr_color_transform *supplied) {
+	struct wlr_color_transform *gamma_lut = scene_output->gamma_lut_color_transform;
+	assert(gamma_lut != NULL);
+
+	if (gamma_lut == scene_output->prev_gamma_lut_color_transform &&
+			supplied == scene_output->prev_supplied_color_transform) {
+		return wlr_color_transform_ref(scene_output->prev_combined_color_transform);
+	}
+
+	struct wlr_color_transform *combined;
+	if (supplied == NULL) {
+		combined = wlr_color_transform_ref(gamma_lut);
+	} else {
+		struct wlr_color_transform *transforms[] = {
+			gamma_lut,
+			supplied,
+		};
+		size_t transforms_len = sizeof(transforms) / sizeof(transforms[0]);
+		combined = wlr_color_transform_init_pipeline(transforms, transforms_len);
+		if (combined == NULL) {
+			return NULL;
+		}
+	}
+
+	wlr_color_transform_unref(scene_output->prev_gamma_lut_color_transform);
+	scene_output->prev_gamma_lut_color_transform = wlr_color_transform_ref(gamma_lut);
+	wlr_color_transform_unref(scene_output->prev_supplied_color_transform);
+	scene_output->prev_supplied_color_transform = supplied ? wlr_color_transform_ref(supplied) : NULL;
+	wlr_color_transform_unref(scene_output->prev_combined_color_transform);
+	scene_output->prev_combined_color_transform = wlr_color_transform_ref(combined);
+
+	return combined;
+}
+
 bool wlr_scene_output_build_state(struct wlr_scene_output *scene_output,
 		struct wlr_output_state *state, const struct wlr_scene_output_state_options *options) {
 	struct wlr_scene_output_state_options default_options = {0};
@@ -2145,6 +2187,16 @@ bool wlr_scene_output_build_state(struct wlr_scene_output *scene_output,
 	enum wlr_scene_debug_damage_option debug_damage =
 		scene_output->scene->debug_damage_option;
 
+	bool render_gamma_lut = false;
+	if (wlr_output_get_gamma_size(output) == 0 && output->renderer->features.output_color_transform) {
+		if (scene_output->gamma_lut_color_transform != scene_output->prev_gamma_lut_color_transform) {
+			scene_output_damage_whole(scene_output);
+		}
+		if (scene_output->gamma_lut_color_transform != NULL) {
+			render_gamma_lut = true;
+		}
+	}
+
 	struct render_data render_data = {
 		.transform = output->transform,
 		.scale = output->scale,
@@ -2245,7 +2297,7 @@ bool wlr_scene_output_build_state(struct wlr_scene_output *scene_output,
 	// - There are no color transforms that need to be applied
 	// - Damage highlight debugging is not enabled
 	enum scene_direct_scanout_result scanout_result = SCANOUT_INELIGIBLE;
-	if (options->color_transform == NULL && list_len == 1
+	if (options->color_transform == NULL && !render_gamma_lut && list_len == 1
 			&& debug_damage != WLR_SCENE_DEBUG_DAMAGE_HIGHLIGHT) {
 		scanout_result = scene_entry_try_direct_scanout(&list_data[0], state, &render_data);
 	}
@@ -2319,6 +2371,17 @@ bool wlr_scene_output_build_state(struct wlr_scene_output *scene_output,
 		color_transform = wlr_color_transform_ref(options->color_transform);
 	}
 
+	if (render_gamma_lut) {
+		struct wlr_color_transform *combined =
+			scene_output_combine_color_transforms(scene_output, color_transform);
+		wlr_color_transform_unref(color_transform);
+		if (combined == NULL) {
+			wlr_buffer_unlock(buffer);
+			return false;
+		}
+		color_transform = combined;
+	}
+
 	scene_output->in_point++;
 	struct wlr_render_pass *render_pass = wlr_renderer_begin_buffer_pass(output->renderer, buffer,
 			&(struct wlr_buffer_pass_options){
@@ -2441,7 +2504,9 @@ bool wlr_scene_output_build_state(struct wlr_scene_output *scene_output,
 			scene_output->in_point);
 	}
 
-	scene_output_state_attempt_gamma(scene_output, state);
+	if (!render_gamma_lut) {
+		scene_output_state_attempt_gamma(scene_output, state);
+	}
 
 	return true;
 }

types/wlr_gamma_control_v1.c

@@ -157,6 +157,9 @@ static void gamma_control_manager_get_gamma_control(struct wl_client *client,
 	}
 
 	size_t gamma_size = wlr_output_get_gamma_size(output);
+	if (gamma_size == 0) {
+		gamma_size = manager->fallback_gamma_size;
+	}
 	if (gamma_size == 0) {
 		zwlr_gamma_control_v1_send_failed(resource);
 		return;
@@ -262,15 +265,24 @@ struct wlr_gamma_control_v1 *wlr_gamma_control_manager_v1_get_control(
 	return NULL;
 }
 
+struct wlr_color_transform *wlr_gamma_control_v1_get_color_transform(
+		struct wlr_gamma_control_v1 *gamma_control) {
+	if (gamma_control == NULL || gamma_control->table == NULL) {
+		return NULL;
+	}
+
+	const uint16_t *r = gamma_control->table;
+	const uint16_t *g = gamma_control->table + gamma_control->ramp_size;
+	const uint16_t *b = gamma_control->table + 2 * gamma_control->ramp_size;
+
+	return wlr_color_transform_init_lut_3x1d(gamma_control->ramp_size, r, g, b);
+}
+
 bool wlr_gamma_control_v1_apply(struct wlr_gamma_control_v1 *gamma_control,
 		struct wlr_output_state *output_state) {
 	struct wlr_color_transform *tr = NULL;
 	if (gamma_control != NULL && gamma_control->table != NULL) {
-		const uint16_t *r = gamma_control->table;
-		const uint16_t *g = gamma_control->table + gamma_control->ramp_size;
-		const uint16_t *b = gamma_control->table + 2 * gamma_control->ramp_size;
-
-		tr = wlr_color_transform_init_lut_3x1d(gamma_control->ramp_size, r, g, b);
+		tr = wlr_gamma_control_v1_get_color_transform(gamma_control);
 		if (tr == NULL) {
 			return false;
 		}

types/wlr_input_method_v2.c

@@ -56,6 +56,7 @@ static void input_method_destroy(struct wlr_input_method_v2 *input_method) {
 			popup_surface, tmp, &input_method->popup_surfaces, link) {
 		popup_surface_destroy(popup_surface);
 	}
+	wlr_input_method_keyboard_grab_v2_destroy(input_method->keyboard_grab);
 	wl_signal_emit_mutable(&input_method->events.destroy, NULL);
 
 	assert(wl_list_empty(&input_method->events.commit.listener_list));
@@ -65,7 +66,6 @@ static void input_method_destroy(struct wlr_input_method_v2 *input_method) {
 
 	wl_list_remove(wl_resource_get_link(input_method->resource));
 	wl_list_remove(&input_method->seat_client_destroy.link);
-	wlr_input_method_keyboard_grab_v2_destroy(input_method->keyboard_grab);
 	input_state_reset(&input_method->pending);
 	input_state_reset(&input_method->current);
 	free(input_method);
@@ -271,8 +271,7 @@ void wlr_input_method_keyboard_grab_v2_destroy(
 	if (!keyboard_grab) {
 		return;
 	}
-	wl_signal_emit_mutable(&keyboard_grab->events.destroy, keyboard_grab);
-
+	wl_signal_emit_mutable(&keyboard_grab->events.destroy, NULL);
 	assert(wl_list_empty(&keyboard_grab->events.destroy.listener_list));
 
 	keyboard_grab->input_method->keyboard_grab = NULL;

types/wlr_linux_drm_syncobj_v1.c

@@ -26,7 +26,7 @@ struct wlr_linux_drm_syncobj_surface_v1 {
 };
 
 struct wlr_linux_drm_syncobj_surface_v1_commit {
-	struct wlr_linux_drm_syncobj_surface_v1 *surface;
+	struct wlr_surface *surface;
 	struct wlr_drm_syncobj_timeline_waiter waiter;
 	uint32_t cached_seq;
 
@@ -192,7 +192,7 @@ static struct wlr_linux_drm_syncobj_surface_v1 *surface_from_wlr_surface(
 }
 
 static void surface_commit_destroy(struct wlr_linux_drm_syncobj_surface_v1_commit *commit) {
-	wlr_surface_unlock_cached(commit->surface->surface, commit->cached_seq);
+	wlr_surface_unlock_cached(commit->surface, commit->cached_seq);
 	wl_list_remove(&commit->surface_destroy.link);
 	wlr_drm_syncobj_timeline_waiter_finish(&commit->waiter);
 	free(commit);
@@ -237,7 +237,7 @@ static bool lock_surface_commit(struct wlr_linux_drm_syncobj_surface_v1 *surface
 		return false;
 	}
 
-	commit->surface = surface;
+	commit->surface = surface->surface;
 	commit->cached_seq = wlr_surface_lock_pending(surface->surface);
 
 	commit->surface_destroy.notify = surface_commit_handle_surface_destroy;

util/box.c

@@ -19,16 +19,15 @@ void wlr_box_closest_point(const struct wlr_box *box, double x, double y,
 	//
 	// In order to be consistent with e.g. wlr_box_contains_point(),
 	// this function returns a point inside the bottom and right edges
-	// of the box by at least 1/65536 of a unit (pixel). 1/65536 is
+	// of the box by at least 1/256 of a unit (pixel). 1/256 is
 	// small enough to avoid a "dead zone" with high-resolution mice
-	// but large enough to avoid rounding to zero (due to loss of
-	// significant digits) in simple floating-point calculations.
+	// but large enough to avoid rounding to zero in wl_fixed_from_double().
 
 	// find the closest x point
 	if (x < box->x) {
 		*dest_x = box->x;
-	} else if (x > box->x + box->width - 1/65536.0) {
-		*dest_x = box->x + box->width - 1/65536.0;
+	} else if (x > box->x + box->width - 1/256.0) {
+		*dest_x = box->x + box->width - 1/256.0;
 	} else {
 		*dest_x = x;
 	}
@@ -36,8 +35,8 @@ void wlr_box_closest_point(const struct wlr_box *box, double x, double y,
 	// find closest y point
 	if (y < box->y) {
 		*dest_y = box->y;
-	} else if (y > box->y + box->height - 1/65536.0) {
-		*dest_y = box->y + box->height - 1/65536.0;
+	} else if (y > box->y + box->height - 1/256.0) {
+		*dest_y = box->y + box->height - 1/256.0;
 	} else {
 		*dest_y = y;
 	}

xwayland/xwayland.c

@@ -42,6 +42,9 @@ static void handle_server_start(struct wl_listener *listener, void *data) {
 static void xwayland_mark_ready(struct wlr_xwayland *xwayland) {
 	assert(xwayland->server->wm_fd[0] >= 0);
 	xwayland->xwm = xwm_create(xwayland, xwayland->server->wm_fd[0]);
+	// xwm_create takes ownership of wm_fd[0] under all circumstances
+	xwayland->server->wm_fd[0] = -1;
+
 	if (!xwayland->xwm) {
 		return;
 	}

xwayland/xwm.c

@@ -2530,6 +2530,7 @@ void xwm_set_cursor(struct wlr_xwm *xwm, const uint8_t *pixels, uint32_t stride,
 struct wlr_xwm *xwm_create(struct wlr_xwayland *xwayland, int wm_fd) {
 	struct wlr_xwm *xwm = calloc(1, sizeof(*xwm));
 	if (xwm == NULL) {
+		close(wm_fd);
 		return NULL;
 	}
 
@@ -2544,11 +2545,13 @@ struct wlr_xwm *xwm_create(struct wlr_xwayland *xwayland, int wm_fd) {
 
 	xwm->ping_timeout = 10000;
 
+	// xcb_connect_to_fd takes ownership of the FD regardless of success/failure
 	xwm->xcb_conn = xcb_connect_to_fd(wm_fd, NULL);
 
 	int rc = xcb_connection_has_error(xwm->xcb_conn);
 	if (rc) {
 		wlr_log(WLR_ERROR, "xcb connect failed: %d", rc);
+		xcb_disconnect(xwm->xcb_conn);
 		free(xwm);
 		return NULL;
 	}
@@ -2745,6 +2748,22 @@ bool xwm_atoms_contains(struct wlr_xwm *xwm, xcb_atom_t *atoms,
 }
 
 void wlr_xwayland_surface_ping(struct wlr_xwayland_surface *surface) {
+	if (surface->pinging) {
+		return;
+	}
+
+	// don't ping if client not supports
+	bool supports_ping = false;
+	for(size_t i = 0; i < surface->protocols_len; i++) {
+		if (surface->protocols[i] == surface->xwm->atoms[NET_WM_PING]) {
+			supports_ping = true;
+			break;
+		}
+	}
+	if (!supports_ping) {
+		return;
+	}
+
 	xcb_client_message_data_t data = { 0 };
 	data.data32[0] = surface->xwm->atoms[NET_WM_PING];
 	data.data32[1] = XCB_CURRENT_TIME;