path: root/x11-misc/redshift/files/redshift-wlroots-gamma.patch

diff --git a/configure.ac b/configure.ac
index b4116262..8347dcc4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -68,6 +68,10 @@ PKG_CHECK_MODULES([XCB], [xcb], [have_xcb=yes], [have_xcb=no])
 PKG_CHECK_MODULES([XCB_RANDR], [xcb-randr],
 	[have_xcb_randr=yes], [have_xcb_randr=no])
 
+PKG_CHECK_MODULES([WAYLAND], [wayland-client wayland-scanner >= 1.15.0],
+	[have_wayland=yes], [have_wayland=no])
+PKG_CHECK_VAR(WAYLAND_SCANNER, wayland-scanner, wayland_scanner)
+
 PKG_CHECK_MODULES([GLIB], [glib-2.0 gobject-2.0], [have_glib=yes], [have_glib=no])
 PKG_CHECK_MODULES([GEOCLUE2], [glib-2.0 gio-2.0 >= 2.26], [have_geoclue2=yes], [have_geoclue2=no])
 
@@ -124,6 +128,30 @@ AS_IF([test "x$enable_drm" != xno], [
 ])
 AM_CONDITIONAL([ENABLE_DRM], [test "x$enable_drm" = xyes])
 
+# Check Wayland method
+AC_MSG_CHECKING([whether to enable Wayland method])
+AC_ARG_ENABLE([wayland], [AC_HELP_STRING([--enable-wayland],
+	[enable Wayland method])],
+	[enable_wayland=$enableval],[enable_wayland=maybe])
+AS_IF([test "x$enable_wayland" != xno], [
+	AS_IF([test $have_wayland = yes], [
+		AC_DEFINE([ENABLE_WAYLAND], 1,
+			[Define to 1 to enable Wayland method])
+		AC_MSG_RESULT([yes])
+		enable_wayland=yes
+	], [
+		AC_MSG_RESULT([missing dependencies])
+		AS_IF([test "x$enable_wayland" = xyes], [
+			AC_MSG_ERROR([missing dependencies for Wayland method])
+		])
+		enable_wayland=no
+	])
+], [
+	AC_MSG_RESULT([no])
+	enable_wayland=no
+])
+AM_CONDITIONAL([ENABLE_WAYLAND], [test "x$enable_wayland" = xyes])
+
 # Check RANDR method
 AC_MSG_CHECKING([whether to enable RANDR method])
 AC_ARG_ENABLE([randr], [AC_HELP_STRING([--enable-randr],
@@ -376,6 +404,7 @@ echo "
 
     Adjustment methods:
     DRM:		${enable_drm}
+    Wayland:		${enable_wayland}
     RANDR:		${enable_randr}
     VidMode:		${enable_vidmode}
     Quartz (macOS):	${enable_quartz}
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 5ef8dacc..1d255600 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -9,6 +9,7 @@ src/options.c
 src/config-ini.c
 
 src/gamma-drm.c
+src/gamma-wl.c
 src/gamma-randr.c
 src/gamma-vidmode.c
 src/gamma-quartz.c
diff --git a/src/Makefile.am b/src/Makefile.am
index 8aa96ead..4f1acf4f 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -23,6 +23,7 @@ redshift_SOURCES = \
 
 EXTRA_redshift_SOURCES = \
 	gamma-drm.c gamma-drm.h \
+	gamma-wl.c gamma-wl.h \
 	gamma-randr.c gamma-randr.h \
 	gamma-vidmode.c gamma-vidmode.h \
 	gamma-quartz.c gamma-quartz.h \
@@ -43,6 +44,27 @@ redshift_LDADD += \
 	$(DRM_LIBS) $(DRM_CFLAGS)
 endif
 
+if ENABLE_WAYLAND
+redshift_SOURCES += gamma-wl.c gamma-wl.h os-compatibility.c os-compatibility.h
+
+AM_CFLAGS += $(WAYLAND_CFLAGS)
+
+redshift_LDADD += \
+	$(WAYLAND_LIBS) $(WAYLAND_CFLAGS)
+
+nodist_redshift_SOURCES = \
+	gamma-control-client-protocol.h \
+	gamma-control-protocol.c \
+	orbital-authorizer-protocol.c \
+	orbital-authorizer-client-protocol.h
+
+BUILT_SOURCES = \
+	gamma-control-protocol.c \
+	gamma-control-client-protocol.h \
+	orbital-authorizer-protocol.c \
+	orbital-authorizer-client-protocol.h
+endif
+
 if ENABLE_RANDR
 redshift_SOURCES += gamma-randr.c gamma-randr.h
 AM_CFLAGS += $(XCB_CFLAGS) $(XCB_RANDR_CFLAGS)
@@ -103,3 +125,11 @@ endif
 
 .rc.o:
 	$(AM_V_GEN)$(WINDRES) -I$(top_builddir) -i $< -o $@
+
+%-protocol.c : $(srcdir)/%.xml
+	$(AM_V_GEN)$(MKDIR_P) $(dir $@) && $(WAYLAND_SCANNER) private-code < $< > $@
+
+%-client-protocol.h : $(srcdir)/%.xml
+	$(AM_V_GEN)$(MKDIR_P) $(dir $@) && $(WAYLAND_SCANNER) client-header < $< > $@
+
+CLEANFILES = *-protocol.c *-client-protocol.h
diff --git a/src/gamma-control.xml b/src/gamma-control.xml
new file mode 100644
index 00000000..ad71a15c
--- /dev/null
+++ b/src/gamma-control.xml
@@ -0,0 +1,126 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<protocol name="wlr_gamma_control_unstable_v1">
+  <copyright>
+    Copyright © 2015 Giulio camuffo
+    Copyright © 2018 Simon Ser
+
+    Permission to use, copy, modify, distribute, and sell this
+    software and its documentation for any purpose is hereby granted
+    without fee, provided that the above copyright notice appear in
+    all copies and that both that copyright notice and this permission
+    notice appear in supporting documentation, and that the name of
+    the copyright holders not be used in advertising or publicity
+    pertaining to distribution of the software without specific,
+    written prior permission.  The copyright holders make no
+    representations about the suitability of this software for any
+    purpose.  It is provided "as is" without express or implied
+    warranty.
+
+    THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+    SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+    FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+    SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+    AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+    ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+    THIS SOFTWARE.
+  </copyright>
+
+  <description summary="manage gamma tables of outputs">
+    This protocol allows a privileged client to set the gamma tables for
+    outputs.
+
+    Warning! The protocol described in this file is experimental and
+    backward incompatible changes may be made. Backward compatible changes
+    may be added together with the corresponding interface version bump.
+    Backward incompatible changes are done by bumping the version number in
+    the protocol and interface names and resetting the interface version.
+    Once the protocol is to be declared stable, the 'z' prefix and the
+    version number in the protocol and interface names are removed and the
+    interface version number is reset.
+  </description>
+
+  <interface name="zwlr_gamma_control_manager_v1" version="1">
+    <description summary="manager to create per-output gamma controls">
+      This interface is a manager that allows creating per-output gamma
+      controls.
+    </description>
+
+    <request name="get_gamma_control">
+      <description summary="get a gamma control for an output">
+        Create a gamma control that can be used to adjust gamma tables for the
+        provided output.
+      </description>
+      <arg name="id" type="new_id" interface="zwlr_gamma_control_v1"/>
+      <arg name="output" type="object" interface="wl_output"/>
+    </request>
+
+    <request name="destroy" type="destructor">
+      <description summary="destroy the manager">
+        All objects created by the manager will still remain valid, until their
+        appropriate destroy request has been called.
+      </description>
+    </request>
+  </interface>
+
+  <interface name="zwlr_gamma_control_v1" version="1">
+    <description summary="adjust gamma tables for an output">
+      This interface allows a client to adjust gamma tables for a particular
+      output.
+
+      The client will receive the gamma size, and will then be able to set gamma
+      tables. At any time the compositor can send a failed event indicating that
+      this object is no longer valid.
+
+      There must always be at most one gamma control object per output, which
+      has exclusive access to this particular output. When the gamma control
+      object is destroyed, the gamma table is restored to its original value.
+    </description>
+
+    <event name="gamma_size">
+      <description summary="size of gamma ramps">
+        Advertise the size of each gamma ramp.
+
+        This event is sent immediately when the gamma control object is created.
+      </description>
+      <arg name="size" type="uint"/>
+    </event>
+
+    <enum name="error">
+      <entry name="invalid_gamma" value="1" summary="invalid gamma tables"/>
+    </enum>
+
+    <request name="set_gamma">
+      <description summary="set the gamma table">
+        Set the gamma table. The file descriptor can be memory-mapped to provide
+        the raw gamma table, which contains successive gamma ramps for the red,
+        green and blue channels. Each gamma ramp is an array of 16-byte unsigned
+        integers which has the same length as the gamma size.
+
+        The file descriptor data must have the same length as three times the
+        gamma size.
+      </description>
+      <arg name="fd" type="fd" summary="gamma table file descriptor"/>
+    </request>
+
+    <event name="failed">
+      <description summary="object no longer valid">
+        This event indicates that the gamma control is no longer valid. This
+        can happen for a number of reasons, including:
+        - The output doesn't support gamma tables
+        - Setting the gamma tables failed
+        - Another client already has exclusive gamma control for this output
+        - The compositor has transfered gamma control to another client
+
+        Upon receiving this event, the client should destroy this object.
+      </description>
+    </event>
+
+    <request name="destroy" type="destructor">
+      <description summary="destroy this control">
+        Destroys the gamma control object. If the object is still valid, this
+        restores the original gamma tables.
+      </description>
+    </request>
+  </interface>
+</protocol>
diff --git a/src/gamma-wl.c b/src/gamma-wl.c
new file mode 100644
index 00000000..8efa1c2e
--- /dev/null
+++ b/src/gamma-wl.c
@@ -0,0 +1,365 @@
+/* gamma-wl.c -- Wayland gamma adjustment header
+   This file is part of Redshift.
+
+   Redshift is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   Redshift is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with Redshift.  If not, see <http://www.gnu.org/licenses/>.
+
+   Copyright (c) 2015  Giulio Camuffo <giuliocamuffo@gmail.com>
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#ifdef ENABLE_NLS
+# include <libintl.h>
+# define _(s) gettext(s)
+#else
+# define _(s) s
+#endif
+
+#include "gamma-wl.h"
+#include "os-compatibility.h"
+#include "colorramp.h"
+
+#include "gamma-control-client-protocol.h"
+#include "orbital-authorizer-client-protocol.h"
+
+typedef struct {
+	struct wl_display *display;
+	struct wl_registry *registry;
+	struct wl_callback *callback;
+	uint32_t gamma_control_manager_id;
+	struct zwlr_gamma_control_manager_v1 *gamma_control_manager;
+	int num_outputs;
+	struct output *outputs;
+	int authorized;
+} wayland_state_t;
+
+struct output {
+	uint32_t global_id;
+	struct wl_output *output;
+	struct zwlr_gamma_control_v1 *gamma_control;
+	uint32_t gamma_size;
+};
+
+static int
+wayland_init(wayland_state_t **state)
+{
+	/* Initialize state. */
+	*state = malloc(sizeof(**state));
+	if (*state == NULL) return -1;
+
+	memset(*state, 0, sizeof **state);
+	return 0;
+}
+
+static void
+authorizer_feedback_granted(void *data, struct orbital_authorizer_feedback *feedback)
+{
+	wayland_state_t *state = data;
+	state->authorized = 1;
+}
+
+static void
+authorizer_feedback_denied(void *data, struct orbital_authorizer_feedback *feedback)
+{
+	fprintf(stderr, _("Fatal: redshift was not authorized to bind the 'zwlr_gamma_control_manager_v1' interface.\n"));
+	exit(EXIT_FAILURE);
+}
+
+static const struct orbital_authorizer_feedback_listener authorizer_feedback_listener = {
+	authorizer_feedback_granted,
+	authorizer_feedback_denied
+};
+
+static void
+registry_global(void *data, struct wl_registry *registry, uint32_t id, const char *interface, uint32_t version)
+{
+	wayland_state_t *state = data;
+
+	if (strcmp(interface, "zwlr_gamma_control_manager_v1") == 0) {
+		state->gamma_control_manager_id = id;
+		state->gamma_control_manager = wl_registry_bind(registry, id, &zwlr_gamma_control_manager_v1_interface, 1);
+	} else if (strcmp(interface, "wl_output") == 0) {
+		state->num_outputs++;
+		if (!(state->outputs = realloc(state->outputs, state->num_outputs * sizeof(struct output)))) {
+			fprintf(stderr, _("Failed to allcate memory\n"));
+			return;
+		}
+
+		struct output *output = &state->outputs[state->num_outputs - 1];
+		output->global_id = id;
+		output->output = wl_registry_bind(registry, id, &wl_output_interface, 1);
+		output->gamma_control = NULL;
+	} else if (strcmp(interface, "orbital_authorizer") == 0) {
+		struct wl_event_queue *queue = wl_display_create_queue(state->display);
+
+		struct orbital_authorizer *auth = wl_registry_bind(registry, id, &orbital_authorizer_interface, 1u);
+		wl_proxy_set_queue((struct wl_proxy *)auth, queue);
+
+		struct orbital_authorizer_feedback *feedback = orbital_authorizer_authorize(auth, "zwlr_gamma_control_manager_v1");
+		orbital_authorizer_feedback_add_listener(feedback, &authorizer_feedback_listener, state);
+
+		int ret = 0;
+		while (!state->authorized && ret >= 0) {
+			ret = wl_display_dispatch_queue(state->display, queue);
+		}
+
+		orbital_authorizer_feedback_destroy(feedback);
+		orbital_authorizer_destroy(auth);
+		wl_event_queue_destroy(queue);
+	}
+}
+
+static void
+registry_global_remove(void *data, struct wl_registry *registry, uint32_t id)
+{
+	wayland_state_t *state = data;
+
+	if (state->gamma_control_manager_id == id) {
+		fprintf(stderr, _("The zwlr_gamma_control_manager_v1 was removed\n"));
+		exit(EXIT_FAILURE);
+	}
+
+	for (int i = 0; i < state->num_outputs; ++i) {
+		struct output *output = &state->outputs[i];
+		if (output->global_id == id) {
+			if (output->gamma_control) {
+				zwlr_gamma_control_v1_destroy(output->gamma_control);
+				output->gamma_control = NULL;
+			}
+			wl_output_destroy(output->output);
+
+			/* If the removed output is not the last one in the array move the last one
+			 * in the now empty slot. Then shrink the array */
+			if (i < --state->num_outputs) {
+				memcpy(output, &state->outputs[state->num_outputs], sizeof(struct output));
+			}
+			state->outputs = realloc(state->outputs, state->num_outputs * sizeof(struct output));
+
+			return;
+		}
+	}
+}
+
+static const struct wl_registry_listener registry_listener = {
+	registry_global,
+	registry_global_remove
+};
+
+static void
+gamma_control_gamma_size(void *data, struct zwlr_gamma_control_v1 *control, uint32_t size)
+{
+	struct output *output = data;
+	output->gamma_size = size;
+}
+
+static void
+gamma_control_failed(void *data, struct zwlr_gamma_control_v1 *control)
+{
+}
+
+
+static const struct zwlr_gamma_control_v1_listener gamma_control_listener = {
+	gamma_control_gamma_size,
+	gamma_control_failed
+};
+
+static int
+wayland_start(wayland_state_t *state)
+{
+	state->display = wl_display_connect(NULL);
+	if (!state->display) {
+		fputs(_("Could not connect to wayland display, exiting.\n"), stderr);
+		return -1;
+	}
+	state->registry = wl_display_get_registry(state->display);
+
+	wl_registry_add_listener(state->registry, &registry_listener, state);
+
+	wl_display_roundtrip(state->display);
+	if (!state->gamma_control_manager) {
+		return -1;
+	}
+	if (state->num_outputs > 0 && !state->outputs) {
+		return -1;
+	}
+
+	return 0;
+}
+
+static void
+wayland_restore(wayland_state_t *state)
+{
+	for (int i = 0; i < state->num_outputs; ++i) {
+		struct output *output = &state->outputs[i];
+		if (output->gamma_control) {
+			zwlr_gamma_control_v1_destroy(output->gamma_control);
+			output->gamma_control = NULL;
+		}
+	}
+	wl_display_flush(state->display);
+}
+
+static void
+wayland_free(wayland_state_t *state)
+{
+	int ret = 0;
+	/* Wait for the sync callback to destroy everything, otherwise
+	 * we could destroy the gamma control before gamma has been set */
+	while (state->callback && ret >= 0) {
+		ret = wl_display_dispatch(state->display);
+	}
+	if (state->callback) {
+		fprintf(stderr, _("Ignoring error on wayland connection while waiting to disconnect: %d\n"), ret);
+		wl_callback_destroy(state->callback);
+	}
+
+	for (int i = 0; i < state->num_outputs; ++i) {
+		struct output *output = &state->outputs[i];
+		if (output->gamma_control) {
+			zwlr_gamma_control_v1_destroy(output->gamma_control);
+			output->gamma_control = NULL;
+		}
+		wl_output_destroy(output->output);
+	}
+
+	if (state->gamma_control_manager) {
+		zwlr_gamma_control_manager_v1_destroy(state->gamma_control_manager);
+	}
+	if (state->registry) {
+		wl_registry_destroy(state->registry);
+	}
+	if (state->display) {
+		wl_display_disconnect(state->display);
+	}
+
+	free(state);
+}
+
+static void
+wayland_print_help(FILE *f)
+{
+	fputs(_("Adjust gamma ramps with a Wayland compositor.\n"), f);
+	fputs("\n", f);
+}
+
+static int
+wayland_set_option(wayland_state_t *state, const char *key, const char *value)
+{
+	return 0;
+}
+
+static void
+callback_done(void *data, struct wl_callback *cb, uint32_t t)
+{
+	wayland_state_t *state = data;
+	state->callback = NULL;
+	wl_callback_destroy(cb);
+}
+
+static const struct wl_callback_listener callback_listener = {
+	callback_done
+};
+
+static int
+wayland_set_temperature(wayland_state_t *state, const color_setting_t *setting)
+{
+	int ret = 0, roundtrip = 0;
+
+	/* We wait for the sync callback to throttle a bit and not send more
+	 * requests than the compositor can manage, otherwise we'd get disconnected.
+	 * This also allows us to dispatch other incoming events such as
+	 * wl_registry.global_remove. */
+	while (state->callback && ret >= 0) {
+		ret = wl_display_dispatch(state->display);
+	}
+	if (ret < 0) {
+		fprintf(stderr, _("The Wayland connection experienced a fatal error: %d\n"), ret);
+		return ret;
+	}
+
+	for (int i = 0; i < state->num_outputs; ++i) {
+		struct output *output = &state->outputs[i];
+		if (!output->gamma_control) {
+			output->gamma_control = zwlr_gamma_control_manager_v1_get_gamma_control(state->gamma_control_manager, output->output);
+			zwlr_gamma_control_v1_add_listener(output->gamma_control, &gamma_control_listener, output);
+			roundtrip = 1;
+		}
+	}
+	if (roundtrip) {
+		wl_display_roundtrip(state->display);
+	}
+
+	for (int i = 0; i < state->num_outputs; ++i) {
+		struct output *output = &state->outputs[i];
+		int size = output->gamma_size;
+		size_t ramp_bytes = size * sizeof(uint16_t);
+		size_t total_bytes = ramp_bytes * 3;
+
+		int fd = os_create_anonymous_file(total_bytes);
+		if (fd < 0) {
+			return -1;
+		}
+
+		void *ptr = mmap(NULL, total_bytes,
+			PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+		if (ptr == MAP_FAILED) {
+			close(fd);
+			return -1;
+		}
+
+		uint16_t *r_gamma = ptr;
+		uint16_t *g_gamma = ptr + ramp_bytes;
+		uint16_t *b_gamma = ptr + 2 * ramp_bytes;
+
+		/* Initialize gamma ramps to pure state */
+		for (int i = 0; i < size; i++) {
+			uint16_t value = (double)i / size * (UINT16_MAX+1);
+			r_gamma[i] = value;
+			g_gamma[i] = value;
+			b_gamma[i] = value;
+		}
+
+		colorramp_fill(r_gamma, g_gamma, b_gamma, size, setting);
+		munmap(ptr, size);
+
+		zwlr_gamma_control_v1_set_gamma(output->gamma_control, fd);
+		close(fd);
+	}
+
+	state->callback = wl_display_sync(state->display);
+	wl_callback_add_listener(state->callback, &callback_listener, state);
+	wl_display_flush(state->display);
+
+	return 0;
+}
+
+const gamma_method_t wl_gamma_method = {
+	"wayland",
+	1,
+	(gamma_method_init_func *) wayland_init,
+	(gamma_method_start_func *) wayland_start,
+	(gamma_method_free_func *) wayland_free,
+	(gamma_method_print_help_func *) wayland_print_help,
+	(gamma_method_set_option_func *) wayland_set_option,
+	(gamma_method_restore_func *) wayland_restore,
+	(gamma_method_set_temperature_func *) wayland_set_temperature,
+};
diff --git a/src/gamma-wl.h b/src/gamma-wl.h
new file mode 100644
index 00000000..333e99b2
--- /dev/null
+++ b/src/gamma-wl.h
@@ -0,0 +1,32 @@
+/* gamma-wl.h -- Wayland gamma adjustment header
+   This file is part of Redshift.
+
+   Redshift is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   Redshift is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with Redshift.  If not, see <http://www.gnu.org/licenses/>.
+
+   Copyright (c) 2015  Giulio Camuffo <giuliocamuffo@gmail.com>
+*/
+
+#ifndef REDSHIFT_GAMMA_WAYLAND_H
+#define REDSHIFT_GAMMA_WAYLAND_H
+
+#include <stdint.h>
+
+#include <wayland-client.h>
+
+#include "redshift.h"
+
+extern const gamma_method_t wl_gamma_method;
+
+
+#endif /* ! REDSHIFT_GAMMA_DRM_H */
diff --git a/src/orbital-authorizer.xml b/src/orbital-authorizer.xml
new file mode 100644
index 00000000..bccaa081
--- /dev/null
+++ b/src/orbital-authorizer.xml
@@ -0,0 +1,61 @@
+<protocol name="orbital_authorizer">
+
+    <interface name="orbital_authorizer" version="1">
+        <description summary="authorize clients to use certain interfaces">
+            The orbital_authorizer global interface allows clients to
+            ask the compositor the authorization to bind certain restricted
+            global interfaces.
+            Any client that aims to bind restricted interfaces should first
+            request the authorization by using this interface. Failing to do
+            so will result in the compositor sending a protocol error to the
+            client when it binds the restricted interface.
+
+            The list of restricted interfaces is compositor dependant, but must
+            not include the core interfaces defined in wayland.xml.
+        </description>
+
+        <request name="destroy" type="destructor">
+            <description summary="destroy this orbital_authorizer object"/>
+        </request>
+
+        <request name="authorize">
+            <description summary="authorize a global interface">
+                The authorize request allows the client to ask the compositor the
+                authorization to bind a restricted global interface. The newly
+                created orbital_authorizer_feedback will be invalid after the
+                compositor send either the granted or denied event so the client
+                must destroy it immediately after.
+            </description>
+            <arg name="id" type="new_id" interface="orbital_authorizer_feedback" summary="the new feedback object"/>
+            <arg name="global" type="string" summary="the global interface the client wants to bind"/>
+        </request>
+    </interface>
+
+    <interface name="orbital_authorizer_feedback" version="1">
+        <description summary="feedback for an authorization request">
+            The orbital_authorizer_feedback interface is used by requesting
+            an authorization with the orbital_authorizer.authorize request.
+            The compositor will send either the granted or denied event based
+            on the system and user configuration. How the authorization process
+            works is compositor specific, but a compositor is allowed to ask
+            for user input, so the response for an authorization request may
+            come after some time.
+        </description>
+
+        <event name="granted">
+            <description summary="the authorization was granted">
+                The authorization was granted. The client can now bind the restricted
+                interface.
+            </description>
+        </event>
+
+        <event name="denied">
+            <description summary="the authorization was denied">
+                The authorization was denied. The client is not allowed to bind the
+                restricted interface and trying to do so will trigger a protocol
+                error killing the client.
+            </description>
+        </event>
+    </interface>
+
+</protocol>
diff --git a/src/os-compatibility.c b/src/os-compatibility.c
new file mode 100644
index 00000000..32a9109e
--- /dev/null
+++ b/src/os-compatibility.c
@@ -0,0 +1,148 @@
+/*
+ * Copyright © 2012 Collabora, Ltd.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#define _POSIX_C_SOURCE 200809L
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include "os-compatibility.h"
+
+int os_fd_set_cloexec(int fd) {
+	if (fd == -1) {
+		return -1;
+	}
+
+	long flags = fcntl(fd, F_GETFD);
+	if (flags == -1) {
+		return -1;
+	}
+
+	if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1) {
+		return -1;
+	}
+
+	return 0;
+}
+
+int set_cloexec_or_close(int fd) {
+	if (os_fd_set_cloexec(fd) != 0) {
+		close(fd);
+		return -1;
+	}
+	return fd;
+}
+
+int create_tmpfile_cloexec(char *tmpname) {
+	int fd;
+	mode_t prev_umask = umask(0066);
+#ifdef HAVE_MKOSTEMP
+	fd = mkostemp(tmpname, O_CLOEXEC);
+	if (fd >= 0) {
+		unlink(tmpname);
+	}
+#else
+	fd = mkstemp(tmpname);
+	if (fd >= 0) {
+		fd = set_cloexec_or_close(fd);
+		unlink(tmpname);
+	}
+#endif
+	umask(prev_umask);
+
+	return fd;
+}
+
+/*
+ * Create a new, unique, anonymous file of the given size, and
+ * return the file descriptor for it. The file descriptor is set
+ * CLOEXEC. The file is immediately suitable for mmap()'ing
+ * the given size at offset zero.
+ *
+ * The file should not have a permanent backing store like a disk,
+ * but may have if XDG_RUNTIME_DIR is not properly implemented in OS.
+ *
+ * The file name is deleted from the file system.
+ *
+ * The file is suitable for buffer sharing between processes by
+ * transmitting the file descriptor over Unix sockets using the
+ * SCM_RIGHTS methods.
+ *
+ * If the C library implements posix_fallocate(), it is used to
+ * guarantee that disk space is available for the file at the
+ * given size. If disk space is insufficient, errno is set to ENOSPC.
+ * If posix_fallocate() is not supported, program may receive
+ * SIGBUS on accessing mmap()'ed file contents instead.
+ */
+int os_create_anonymous_file(off_t size) {
+	static const char template[] = "/redshift-shared-XXXXXX";
+
+	const char *path = getenv("XDG_RUNTIME_DIR");
+	if (!path) {
+		errno = ENOENT;
+		return -1;
+	}
+
+	char *name = malloc(strlen(path) + sizeof(template));
+	if (!name) {
+		return -1;
+	}
+
+	strcpy(name, path);
+	strcat(name, template);
+
+	int fd = create_tmpfile_cloexec(name);
+	free(name);
+	if (fd < 0) {
+		return -1;
+	}
+
+#ifdef WLR_HAS_POSIX_FALLOCATE
+	int ret;
+	do {
+		ret = posix_fallocate(fd, 0, size);
+	} while (ret == EINTR);
+	if (ret != 0) {
+		close(fd);
+		errno = ret;
+		return -1;
+	}
+#else
+	int ret;
+	do {
+		ret = ftruncate(fd, size);
+	} while (ret < 0 && errno == EINTR);
+	if (ret < 0) {
+		close(fd);
+		return -1;
+	}
+#endif
+
+	return fd;
+}
diff --git a/src/os-compatibility.h b/src/os-compatibility.h
new file mode 100644
index 00000000..2038025e
--- /dev/null
+++ b/src/os-compatibility.h
@@ -0,0 +1,9 @@
+#ifndef UTIL_OS_COMPATIBILITY_H
+#define UTIL_OS_COMPATIBILITY_H
+
+int os_fd_set_cloexec(int fd);
+int set_cloexec_or_close(int fd);
+int create_tmpfile_cloexec(char *tmpname);
+int os_create_anonymous_file(off_t size);
+
+#endif
diff --git a/src/redshift.c b/src/redshift.c
index e0221d5e..953d79e0 100644
--- a/src/redshift.c
+++ b/src/redshift.c
@@ -94,6 +94,10 @@ int poll(struct pollfd *fds, int nfds, int timeout) { abort(); return -1; }
 # include "gamma-w32gdi.h"
 #endif
 
+#ifdef ENABLE_WAYLAND
+# include "gamma-wl.h"
+#endif
+
 
 #include "location-manual.h"
 
@@ -902,6 +906,9 @@ main(int argc, char *argv[])
 
 	/* List of gamma methods. */
 	const gamma_method_t gamma_methods[] = {
+#ifdef ENABLE_WAYLAND
+		wl_gamma_method,
+#endif
 #ifdef ENABLE_DRM
 		drm_gamma_method,
 #endif