screencopy-v1: add basic implementation

examples/meson.build

@@ -56,3 +56,9 @@ if libavutil.found() and libavcodec.found() and libavformat.found()
 				libavformat, wlroots, threads ]
 	)
 endif
+
+executable(
+	'screencopy',
+	'screencopy.c',
+	dependencies: [wayland_client, wlr_protos, wlroots]
+)

examples/screencopy.c

@@ -0,0 +1,232 @@
+/*
+ * Copyright © 2008 Kristian Høgsberg
+ *
+ * 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 _XOPEN_SOURCE 700
+#define _POSIX_C_SOURCE 199309L
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/param.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <wayland-client-protocol.h>
+#include "wlr-screencopy-unstable-v1-client-protocol.h"
+
+static struct wl_shm *shm = NULL;
+static struct zwlr_screencopy_manager_v1 *screencopy_manager = NULL;
+static struct wl_output *output = NULL;
+
+static struct {
+	struct wl_buffer *wl_buffer;
+	void *data;
+	int width, height, stride;
+} buffer;
+bool buffer_copy_done = false;
+
+static int backingfile(off_t size) {
+	char template[] = "/tmp/wlroots-shared-XXXXXX";
+	int fd = mkstemp(template);
+	if (fd < 0) {
+		return -1;
+	}
+
+	int ret;
+	while ((ret = ftruncate(fd, size)) == EINTR) {
+		// No-op
+	}
+	if (ret < 0) {
+		close(fd);
+		return -1;
+	}
+
+	unlink(template);
+	return fd;
+}
+
+static struct wl_buffer *create_shm_buffer(int width, int height,
+		int *stride_out, void **data_out) {
+	int stride = width * 4;
+	int size = stride * height;
+
+	int fd = backingfile(size);
+	if (fd < 0) {
+		fprintf(stderr, "creating a buffer file for %d B failed: %m\n", size);
+		return NULL;
+	}
+
+	void *data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+	if (data == MAP_FAILED) {
+		fprintf(stderr, "mmap failed: %m\n");
+		close(fd);
+		return NULL;
+	}
+
+	struct wl_shm_pool *pool = wl_shm_create_pool(shm, fd, size);
+	close(fd);
+	struct wl_buffer *buffer = wl_shm_pool_create_buffer(pool, 0, width, height,
+		stride, WL_SHM_FORMAT_XRGB8888);
+	wl_shm_pool_destroy(pool);
+
+	*data_out = data;
+	*stride_out = stride;
+	return buffer;
+}
+
+static void frame_handle_buffer(void *data,
+		struct zwlr_screencopy_frame_v1 *frame, uint32_t width, uint32_t height,
+		uint32_t flags, uint32_t format, uint32_t stride) {
+	buffer.width = width;
+	buffer.height = height;
+	buffer.wl_buffer =
+		create_shm_buffer(width, height, &buffer.stride, &buffer.data);
+	if (buffer.wl_buffer == NULL) {
+		fprintf(stderr, "failed to create buffer\n");
+		exit(EXIT_FAILURE);
+	}
+
+	zwlr_screencopy_frame_v1_copy(frame, buffer.wl_buffer);
+}
+
+static void frame_handle_ready(void *data,
+		struct zwlr_screencopy_frame_v1 *frame) {
+	buffer_copy_done = true;
+}
+
+static void frame_handle_failed(void *data,
+		struct zwlr_screencopy_frame_v1 *frame) {
+	fprintf(stderr, "failed to copy frame\n");
+	exit(EXIT_FAILURE);
+}
+
+static const struct zwlr_screencopy_frame_v1_listener frame_listener = {
+	.buffer = frame_handle_buffer,
+	.ready = frame_handle_ready,
+	.failed = frame_handle_failed,
+};
+
+static void handle_global(void *data, struct wl_registry *registry,
+		uint32_t name, const char *interface, uint32_t version) {
+	if (strcmp(interface, wl_output_interface.name) == 0 && output == NULL) {
+		output = wl_registry_bind(registry, name, &wl_output_interface, 1);
+	} else if (strcmp(interface, wl_shm_interface.name) == 0) {
+		shm = wl_registry_bind(registry, name, &wl_shm_interface, 1);
+	} else if (strcmp(interface, zwlr_screencopy_manager_v1_interface.name)
+			== 0) {
+		screencopy_manager = wl_registry_bind(registry, name,
+			&zwlr_screencopy_manager_v1_interface, 1);
+	}
+}
+
+static void handle_global_remove(void *data, struct wl_registry *registry,
+		uint32_t name) {
+	// Who cares?
+}
+
+static const struct wl_registry_listener registry_listener = {
+	.global = handle_global,
+	.global_remove = handle_global_remove,
+};
+
+static void write_image(const char *filename, int width, int height, int stride,
+		void *data) {
+	char size[10 + 1 + 10 + 2 + 1]; // int32_t are max 10 digits
+	sprintf(size, "%dx%d+0", width, height);
+
+	int fd[2];
+	if (pipe(fd) != 0) {
+		fprintf(stderr, "cannot create pipe: %s\n", strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+
+	pid_t child = fork();
+	if (child < 0) {
+		fprintf(stderr, "fork() failed\n");
+		exit(EXIT_FAILURE);
+	} else if (child != 0) {
+		close(fd[0]);
+		if (write(fd[1], data, stride * height) < 0) {
+			fprintf(stderr, "write() failed: %s\n", strerror(errno));
+			exit(EXIT_FAILURE);
+		}
+		close(fd[1]);
+		waitpid(child, NULL, 0);
+	} else {
+		close(fd[1]);
+		if (dup2(fd[0], 0) != 0) {
+			fprintf(stderr, "cannot dup the pipe\n");
+			exit(EXIT_FAILURE);
+		}
+		close(fd[0]);
+		// We requested WL_SHM_FORMAT_XRGB8888 in little endian, so that's BGRA
+		// in big endian.
+		execlp("convert", "convert", "-depth", "8", "-size", size, "bgra:-",
+			"-alpha", "opaque", filename, NULL);
+		fprintf(stderr, "cannot execute convert\n");
+		exit(EXIT_FAILURE);
+	}
+}
+
+int main(int argc, char *argv[]) {
+	struct wl_display * display = wl_display_connect(NULL);
+	if (display == NULL) {
+		fprintf(stderr, "failed to create display: %m\n");
+		return EXIT_FAILURE;
+	}
+
+	struct wl_registry *registry = wl_display_get_registry(display);
+	wl_registry_add_listener(registry, &registry_listener, NULL);
+	wl_display_dispatch(display);
+	wl_display_roundtrip(display);
+
+	if (shm == NULL) {
+		fprintf(stderr, "compositor is missing wl_shm\n");
+		return EXIT_FAILURE;
+	}
+	if (screencopy_manager == NULL) {
+		fprintf(stderr, "compositor doesn't support wlr-screencopy-unstable-v1\n");
+		return EXIT_FAILURE;
+	}
+	if (output == NULL) {
+		fprintf(stderr, "no output available\n");
+		return EXIT_FAILURE;
+	}
+
+	struct zwlr_screencopy_frame_v1 *frame =
+		zwlr_screencopy_manager_v1_capture_output(screencopy_manager, output);
+	zwlr_screencopy_frame_v1_add_listener(frame, &frame_listener, NULL);
+
+	while (!buffer_copy_done) {
+		wl_display_roundtrip(display);
+	}
+
+	write_image("wayland-screenshot.png", buffer.width, buffer.height,
+		buffer.stride, buffer.data);
+	wl_buffer_destroy(buffer.wl_buffer);
+
+	return EXIT_SUCCESS;
+}

include/rootston/desktop.h

@@ -22,6 +22,7 @@
 #include <wlr/types/wlr_list.h>
 #include <wlr/types/wlr_idle.h>
 #include <wlr/types/wlr_idle_inhibit_v1.h>
+#include <wlr/types/wlr_screencopy_v1.h>
 #include "rootston/view.h"
 #include "rootston/config.h"
 #include "rootston/output.h"
@@ -54,6 +55,7 @@ struct roots_desktop {
 	struct wlr_linux_dmabuf *linux_dmabuf;
 	struct wlr_layer_shell *layer_shell;
 	struct wlr_virtual_keyboard_manager_v1 *virtual_keyboard;
+	struct wlr_screencopy_manager_v1 *screencopy;
 
 	struct wl_listener new_output;
 	struct wl_listener layout_change;

include/wlr/types/wlr_screencopy_v1.h

@@ -0,0 +1,36 @@
+#ifndef WLR_TYPES_WLR_SCREENCOPY_V1_H
+#define WLR_TYPES_WLR_SCREENCOPY_V1_H
+
+#include <wayland-server.h>
+
+struct wlr_screencopy_manager_v1 {
+	struct wl_global *global;
+	struct wl_list resources; // wl_resource
+	struct wl_list frames; // wlr_screencopy_frame_v1::link
+
+	struct wl_listener display_destroy;
+
+	void *data;
+};
+
+struct wlr_screencopy_frame_v1 {
+	struct wl_resource *resource;
+	struct wlr_screencopy_manager_v1 *manager;
+	struct wl_list link;
+
+	int32_t width, height;
+
+	struct wl_shm_buffer *buffer;
+
+	struct wlr_output *output;
+	struct wl_listener output_swap_buffers;
+
+	void *data;
+};
+
+struct wlr_screencopy_manager_v1 *wlr_screencopy_manager_v1_create(
+	struct wl_display *display);
+void wlr_screencopy_manager_v1_destroy(
+	struct wlr_screencopy_manager_v1 *screencopy);
+
+#endif

protocol/meson.build

@@ -42,6 +42,7 @@ protocols = [
 	'wlr-export-dmabuf-unstable-v1.xml',
 	'wlr-input-inhibitor-unstable-v1.xml',
 	'wlr-layer-shell-unstable-v1.xml',
+	'wlr-screencopy-unstable-v1.xml',
 ]
 
 client_protocols = [
@@ -51,8 +52,9 @@ client_protocols = [
 	'idle.xml',
 	'screenshooter.xml',
 	'wlr-export-dmabuf-unstable-v1.xml',
-	'wlr-layer-shell-unstable-v1.xml',
 	'wlr-input-inhibitor-unstable-v1.xml',
+	'wlr-layer-shell-unstable-v1.xml',
+	'wlr-screencopy-unstable-v1.xml',
 ]
 
 wl_protos_src = []

protocol/wlr-screencopy-unstable-v1.xml

@@ -0,0 +1,122 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<protocol name="wlr_screencopy_unstable_v1">
+  <copyright>
+    Copyright © 2018 Simon Ser
+
+    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.
+  </copyright>
+
+  <description summary="screen content capturing on client buffers">
+    This protocol allows clients to ask the compositor to copy part of the
+    screen content to a client buffer.
+  </description>
+
+  <interface name="zwlr_screencopy_manager_v1" version="1">
+    <description summary="manager to inform clients and begin capturing">
+      This object is a manager which offers requests to start capturing from a
+      source.
+    </description>
+
+    <request name="capture_output">
+      <description summary="start capturing">
+        Request to start capturing from the given output.
+      </description>
+      <arg name="frame" type="new_id" interface="zwlr_screencopy_frame_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_screencopy_frame_v1" version="1">
+    <description summary="a frame ready for copy">
+      This object represents a frame which is ready to have its resources
+      fetched and used.
+    </description>
+
+    <enum name="flags" bitfield="true">
+      <entry name="y_invert" value="1" summary="contents are y-inverted"/>
+    </enum>
+
+    <event name="buffer">
+      <description summary="buffer information">
+        Provides information about the frame's buffer. This event is sent once
+        as soon as the frame is created.
+
+        The client should then create a buffer with the provided width and
+        height, and send a copy request. It can optionally create a buffer with
+        the preferred format and stride.
+      </description>
+      <arg name="width" type="uint" summary="buffer width"/>
+      <arg name="height" type="uint" summary="buffer height"/>
+      <arg name="flags" type="uint" enum="flags" summary="buffer flags"/>
+      <arg name="format" type="uint" summary="preferred DRM_FORMAT"/>
+      <arg name="stride" type="uint" summary="preferred stride"/>
+    </event>
+
+    <request name="copy">
+      <description summary="copy the frame">
+        Copy the frame to the supplied buffer. The buffer must have a the
+        correct size, see zwlr_screencopy_frame_v1.buffer. The buffer needs to
+        have a supported format.
+
+        If the frame is successfully copied, a ready event is sent. Otherwise,
+        an abort event is sent.
+      </description>
+      <arg name="buffer" type="object" interface="wl_buffer"/>
+    </request>
+
+    <enum name="error">
+      <entry name="already_used" value="0"
+        summary="the object has already been used to copy a wl_buffer"/>
+      <entry name="invalid_format" value="1" summary="format not supported"/>
+      <entry name="invalid_dimensions" value="2"
+        summary="invalid width or height"/>
+    </enum>
+
+    <event name="ready">
+      <description summary="indicates frame is available for reading">
+        Called as soon as the frame is copied, indicating it is available
+        for reading.
+
+        Upon receiving this event, the client should destroy the object.
+      </description>
+    </event>
+
+    <event name="failed">
+      <description summary="frame copy failed">
+        This event indicates that the attempted frame copy has failed.
+
+        Upon receiving this event, the client should destroy the object.
+      </description>
+    </event>
+
+    <request name="destroy" type="destructor">
+      <description summary="delete this object, used or not">
+        Destroys the frame.
+      </description>
+    </request>
+  </interface>
+</protocol>

rootston/desktop.c

@@ -875,6 +875,9 @@ struct roots_desktop *desktop_create(struct roots_server *server,
 	wl_signal_add(&desktop->virtual_keyboard->events.new_virtual_keyboard,
 		&desktop->virtual_keyboard_new);
 	desktop->virtual_keyboard_new.notify = handle_virtual_keyboard;
+
+	desktop->screencopy = wlr_screencopy_manager_v1_create(server->wl_display);
+
 	return desktop;
 }
 

types/meson.build

@@ -50,6 +50,7 @@ lib_wlr_types = static_library(
 		'wlr_wl_shell.c',
 		'wlr_xcursor_manager.c',
 		'wlr_xdg_output.c',
+		'wlr_screencopy_v1.c',
 	),
 	include_directories: wlr_inc,
 	dependencies: [pixman, xkbcommon, wayland_server, wlr_protos],

types/wlr_screencopy_v1.c

@@ -0,0 +1,250 @@
+#include <assert.h>
+#include <stdlib.h>
+#include <wlr/render/wlr_renderer.h>
+#include <wlr/types/wlr_output.h>
+#include <wlr/types/wlr_screencopy_v1.h>
+#include <wlr/backend.h>
+#include "wlr-screencopy-unstable-v1-protocol.h"
+
+#define SCREENCOPY_MANAGER_VERSION 1
+
+static const struct zwlr_screencopy_frame_v1_interface frame_impl;
+
+static struct wlr_screencopy_frame_v1 *frame_from_resource(
+		struct wl_resource *resource) {
+	assert(wl_resource_instance_of(resource,
+		&zwlr_screencopy_frame_v1_interface, &frame_impl));
+	return wl_resource_get_user_data(resource);
+}
+
+static void frame_handle_output_swap_buffers(struct wl_listener *listener,
+		void *_data) {
+	struct wlr_screencopy_frame_v1 *frame =
+		wl_container_of(listener, frame, output_swap_buffers);
+	struct wlr_output *output = frame->output;
+	struct wlr_renderer *renderer = wlr_backend_get_renderer(output->backend);
+
+	wl_list_remove(&frame->output_swap_buffers.link);
+	wl_list_init(&frame->output_swap_buffers.link);
+
+	if (output->width != frame->width || output->height != frame->height) {
+		zwlr_screencopy_frame_v1_send_failed(frame->resource);
+		return;
+	}
+
+	struct wl_shm_buffer *buffer = frame->buffer;
+	assert(buffer != NULL);
+
+	enum wl_shm_format fmt = wl_shm_buffer_get_format(buffer);
+	int32_t width = wl_shm_buffer_get_width(buffer);
+	int32_t height = wl_shm_buffer_get_height(buffer);
+	int32_t stride = wl_shm_buffer_get_stride(buffer);
+
+	wl_shm_buffer_begin_access(buffer);
+	void *data = wl_shm_buffer_get_data(buffer);
+	bool ok = wlr_renderer_read_pixels(renderer, fmt, stride, width, height,
+		0, 0, 0, 0, data);
+	wl_shm_buffer_end_access(buffer);
+
+	if (!ok) {
+		zwlr_screencopy_frame_v1_send_failed(frame->resource);
+		return;
+	}
+
+	zwlr_screencopy_frame_v1_send_ready(frame->resource);
+
+	// TODO: make frame resource inert
+}
+
+static void frame_handle_copy(struct wl_client *client,
+		struct wl_resource *frame_resource,
+		struct wl_resource *buffer_resource) {
+	struct wlr_screencopy_frame_v1 *frame = frame_from_resource(frame_resource);
+	struct wlr_output *output = frame->output;
+	struct wlr_renderer *renderer = wlr_backend_get_renderer(output->backend);
+
+	struct wl_shm_buffer *buffer = wl_shm_buffer_get(buffer_resource);
+	if (buffer == NULL) {
+		zwlr_screencopy_frame_v1_send_failed(frame_resource);
+		return;
+	}
+
+	enum wl_shm_format fmt = wl_shm_buffer_get_format(buffer);
+	if (!wlr_renderer_format_supported(renderer, fmt)) {
+		wl_resource_post_error(frame->resource,
+			ZWLR_SCREENCOPY_FRAME_V1_ERROR_INVALID_FORMAT,
+			"unsupported format %"PRIu32, fmt);
+		return;
+	}
+
+	if (frame->width != wl_shm_buffer_get_width(buffer) ||
+			frame->height != wl_shm_buffer_get_height(buffer)) {
+		wl_resource_post_error(frame->resource,
+			ZWLR_SCREENCOPY_FRAME_V1_ERROR_INVALID_DIMENSIONS,
+			"invalid width or height");
+		return;
+	}
+
+	if (!wl_list_empty(&frame->output_swap_buffers.link) ||
+			frame->buffer != NULL) {
+		wl_resource_post_error(frame->resource,
+			ZWLR_SCREENCOPY_FRAME_V1_ERROR_ALREADY_USED,
+			"frame already used");
+		return;
+	}
+
+	frame->buffer = buffer;
+
+	wl_signal_add(&output->events.swap_buffers, &frame->output_swap_buffers);
+	frame->output_swap_buffers.notify = frame_handle_output_swap_buffers;
+
+	// Schedule a buffer swap
+	output->needs_swap = true;
+	wlr_output_schedule_frame(output);
+
+	// TODO: listen to buffer destroy
+}
+
+static void frame_handle_destroy(struct wl_client *client,
+		struct wl_resource *frame_resource) {
+	wl_resource_destroy(frame_resource);
+}
+
+static const struct zwlr_screencopy_frame_v1_interface frame_impl = {
+	.copy = frame_handle_copy,
+	.destroy = frame_handle_destroy,
+};
+
+static void frame_handle_resource_destroy(struct wl_resource *frame_resource) {
+	struct wlr_screencopy_frame_v1 *frame = frame_from_resource(frame_resource);
+	wl_list_remove(&frame->link);
+	wl_list_remove(&frame->output_swap_buffers.link);
+	free(frame);
+}
+
+
+static const struct zwlr_screencopy_manager_v1_interface manager_impl;
+
+static struct wlr_screencopy_manager_v1 *manager_from_resource(
+		struct wl_resource *resource) {
+	assert(wl_resource_instance_of(resource,
+		&zwlr_screencopy_manager_v1_interface, &manager_impl));
+	return wl_resource_get_user_data(resource);
+}
+
+static void manager_handle_capture_output(struct wl_client *client,
+		struct wl_resource *manager_resource, uint32_t id,
+		struct wl_resource *output_resource) {
+	struct wlr_screencopy_manager_v1 *manager =
+		manager_from_resource(manager_resource);
+	struct wlr_output *output = wlr_output_from_resource(output_resource);
+
+	struct wlr_screencopy_frame_v1 *frame =
+		calloc(1, sizeof(struct wlr_screencopy_frame_v1));
+	if (frame == NULL) {
+		wl_resource_post_no_memory(manager_resource);
+		return;
+	}
+	frame->manager = manager;
+
+	frame->output = output;
+
+	uint32_t version = wl_resource_get_version(manager_resource);
+	frame->resource = wl_resource_create(client,
+		&zwlr_screencopy_frame_v1_interface, version, id);
+	if (frame->resource == NULL) {
+		free(frame);
+		wl_client_post_no_memory(client);
+		return;
+	}
+	wl_resource_set_implementation(frame->resource, &frame_impl, frame,
+		frame_handle_resource_destroy);
+
+	wl_list_insert(&manager->frames, &frame->link);
+
+	wl_list_init(&frame->output_swap_buffers.link);
+
+	frame->width = output->width;
+	frame->height = output->height;
+	// TODO: don't send zero
+	zwlr_screencopy_frame_v1_send_buffer(frame->resource,
+		frame->width, frame->height, 0, 0, 0);
+}
+
+static void manager_handle_destroy(struct wl_client *client,
+		struct wl_resource *manager_resource) {
+	wl_resource_destroy(manager_resource);
+}
+
+static const struct zwlr_screencopy_manager_v1_interface manager_impl = {
+	.capture_output = manager_handle_capture_output,
+	.destroy = manager_handle_destroy,
+};
+
+void manager_handle_resource_destroy(struct wl_resource *resource) {
+	wl_list_remove(wl_resource_get_link(resource));
+}
+
+static void manager_bind(struct wl_client *client, void *data, uint32_t version,
+		uint32_t id) {
+	struct wlr_screencopy_manager_v1 *manager = data;
+
+	struct wl_resource *resource = wl_resource_create(client,
+		&zwlr_screencopy_manager_v1_interface, version, id);
+	if (resource == NULL) {
+		wl_client_post_no_memory(client);
+		return;
+	}
+	wl_resource_set_implementation(resource, &manager_impl, manager,
+		manager_handle_resource_destroy);
+
+	wl_list_insert(&manager->resources, wl_resource_get_link(resource));
+}
+
+static void handle_display_destroy(struct wl_listener *listener, void *data) {
+	struct wlr_screencopy_manager_v1 *manager =
+		wl_container_of(listener, manager, display_destroy);
+	wlr_screencopy_manager_v1_destroy(manager);
+}
+
+struct wlr_screencopy_manager_v1 *wlr_screencopy_manager_v1_create(
+		struct wl_display *display) {
+	struct wlr_screencopy_manager_v1 *manager =
+		calloc(1, sizeof(struct wlr_screencopy_manager_v1));
+	if (manager == NULL) {
+		return NULL;
+	}
+
+	manager->global = wl_global_create(display,
+		&zwlr_screencopy_manager_v1_interface, SCREENCOPY_MANAGER_VERSION,
+		manager, manager_bind);
+	if (manager->global == NULL) {
+		free(manager);
+		return NULL;
+	}
+	wl_list_init(&manager->resources);
+	wl_list_init(&manager->frames);
+
+	manager->display_destroy.notify = handle_display_destroy;
+	wl_display_add_destroy_listener(display, &manager->display_destroy);
+
+	return manager;
+}
+
+void wlr_screencopy_manager_v1_destroy(
+		struct wlr_screencopy_manager_v1 *manager) {
+	if (manager == NULL) {
+		return;
+	}
+	wl_list_remove(&manager->display_destroy.link);
+	struct wlr_screencopy_frame_v1 *frame, *tmp_frame;
+	wl_list_for_each_safe(frame, tmp_frame, &manager->frames, link) {
+		wl_resource_destroy(frame->resource);
+	}
+	struct wl_resource *resource, *tmp_resource;
+	wl_resource_for_each_safe(resource, tmp_resource, &manager->resources) {
+		wl_resource_destroy(resource);
+	}
+	wl_global_destroy(manager->global);
+	free(manager);
+}