emersion
7 years ago
parent
02dfa9101e
commit
73755ad348
@ -0,0 +1,232 @@
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/*
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* Copyright © 2008 Kristian Høgsberg
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#define _XOPEN_SOURCE 700
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#define _POSIX_C_SOURCE 199309L
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/mman.h>
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#include <sys/param.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <wayland-client-protocol.h>
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#include "wlr-screencopy-unstable-v1-client-protocol.h"
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static struct wl_shm *shm = NULL;
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static struct zwlr_screencopy_manager_v1 *screencopy_manager = NULL;
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static struct wl_output *output = NULL;
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static struct {
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struct wl_buffer *wl_buffer;
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void *data;
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int width, height, stride;
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} buffer;
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bool buffer_copy_done = false;
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static int backingfile(off_t size) {
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char template[] = "/tmp/wlroots-shared-XXXXXX";
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int fd = mkstemp(template);
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if (fd < 0) {
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return -1;
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}
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int ret;
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while ((ret = ftruncate(fd, size)) == EINTR) {
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// No-op
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}
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if (ret < 0) {
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close(fd);
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return -1;
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}
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unlink(template);
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return fd;
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}
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static struct wl_buffer *create_shm_buffer(int width, int height,
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int *stride_out, void **data_out) {
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int stride = width * 4;
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int size = stride * height;
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int fd = backingfile(size);
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if (fd < 0) {
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fprintf(stderr, "creating a buffer file for %d B failed: %m\n", size);
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return NULL;
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}
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void *data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
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if (data == MAP_FAILED) {
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fprintf(stderr, "mmap failed: %m\n");
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close(fd);
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return NULL;
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}
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struct wl_shm_pool *pool = wl_shm_create_pool(shm, fd, size);
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close(fd);
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struct wl_buffer *buffer = wl_shm_pool_create_buffer(pool, 0, width, height,
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stride, WL_SHM_FORMAT_XRGB8888);
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wl_shm_pool_destroy(pool);
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*data_out = data;
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*stride_out = stride;
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return buffer;
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}
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static void frame_handle_buffer(void *data,
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struct zwlr_screencopy_frame_v1 *frame, uint32_t width, uint32_t height,
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uint32_t flags, uint32_t format, uint32_t stride) {
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buffer.width = width;
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buffer.height = height;
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buffer.wl_buffer =
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create_shm_buffer(width, height, &buffer.stride, &buffer.data);
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if (buffer.wl_buffer == NULL) {
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fprintf(stderr, "failed to create buffer\n");
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exit(EXIT_FAILURE);
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}
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zwlr_screencopy_frame_v1_copy(frame, buffer.wl_buffer);
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}
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static void frame_handle_ready(void *data,
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struct zwlr_screencopy_frame_v1 *frame) {
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buffer_copy_done = true;
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}
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static void frame_handle_failed(void *data,
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struct zwlr_screencopy_frame_v1 *frame) {
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fprintf(stderr, "failed to copy frame\n");
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exit(EXIT_FAILURE);
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}
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static const struct zwlr_screencopy_frame_v1_listener frame_listener = {
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.buffer = frame_handle_buffer,
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.ready = frame_handle_ready,
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.failed = frame_handle_failed,
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};
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static void handle_global(void *data, struct wl_registry *registry,
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uint32_t name, const char *interface, uint32_t version) {
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if (strcmp(interface, wl_output_interface.name) == 0 && output == NULL) {
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output = wl_registry_bind(registry, name, &wl_output_interface, 1);
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} else if (strcmp(interface, wl_shm_interface.name) == 0) {
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shm = wl_registry_bind(registry, name, &wl_shm_interface, 1);
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} else if (strcmp(interface, zwlr_screencopy_manager_v1_interface.name)
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== 0) {
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screencopy_manager = wl_registry_bind(registry, name,
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&zwlr_screencopy_manager_v1_interface, 1);
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}
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}
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static void handle_global_remove(void *data, struct wl_registry *registry,
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uint32_t name) {
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// Who cares?
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}
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static const struct wl_registry_listener registry_listener = {
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.global = handle_global,
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.global_remove = handle_global_remove,
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};
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static void write_image(const char *filename, int width, int height, int stride,
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void *data) {
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char size[10 + 1 + 10 + 2 + 1]; // int32_t are max 10 digits
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sprintf(size, "%dx%d+0", width, height);
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int fd[2];
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if (pipe(fd) != 0) {
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fprintf(stderr, "cannot create pipe: %s\n", strerror(errno));
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exit(EXIT_FAILURE);
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}
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pid_t child = fork();
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if (child < 0) {
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fprintf(stderr, "fork() failed\n");
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exit(EXIT_FAILURE);
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} else if (child != 0) {
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close(fd[0]);
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if (write(fd[1], data, stride * height) < 0) {
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fprintf(stderr, "write() failed: %s\n", strerror(errno));
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exit(EXIT_FAILURE);
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}
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close(fd[1]);
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waitpid(child, NULL, 0);
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} else {
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close(fd[1]);
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if (dup2(fd[0], 0) != 0) {
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fprintf(stderr, "cannot dup the pipe\n");
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exit(EXIT_FAILURE);
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}
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close(fd[0]);
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// We requested WL_SHM_FORMAT_XRGB8888 in little endian, so that's BGRA
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// in big endian.
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execlp("convert", "convert", "-depth", "8", "-size", size, "bgra:-",
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"-alpha", "opaque", filename, NULL);
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fprintf(stderr, "cannot execute convert\n");
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exit(EXIT_FAILURE);
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}
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}
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int main(int argc, char *argv[]) {
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struct wl_display * display = wl_display_connect(NULL);
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if (display == NULL) {
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fprintf(stderr, "failed to create display: %m\n");
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return EXIT_FAILURE;
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}
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struct wl_registry *registry = wl_display_get_registry(display);
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wl_registry_add_listener(registry, ®istry_listener, NULL);
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wl_display_dispatch(display);
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wl_display_roundtrip(display);
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if (shm == NULL) {
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fprintf(stderr, "compositor is missing wl_shm\n");
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return EXIT_FAILURE;
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}
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if (screencopy_manager == NULL) {
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fprintf(stderr, "compositor doesn't support wlr-screencopy-unstable-v1\n");
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return EXIT_FAILURE;
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}
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if (output == NULL) {
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fprintf(stderr, "no output available\n");
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return EXIT_FAILURE;
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}
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struct zwlr_screencopy_frame_v1 *frame =
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zwlr_screencopy_manager_v1_capture_output(screencopy_manager, output);
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zwlr_screencopy_frame_v1_add_listener(frame, &frame_listener, NULL);
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while (!buffer_copy_done) {
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wl_display_roundtrip(display);
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}
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write_image("wayland-screenshot.png", buffer.width, buffer.height,
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buffer.stride, buffer.data);
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wl_buffer_destroy(buffer.wl_buffer);
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return EXIT_SUCCESS;
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}
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@ -0,0 +1,36 @@
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#ifndef WLR_TYPES_WLR_SCREENCOPY_V1_H
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#define WLR_TYPES_WLR_SCREENCOPY_V1_H
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#include <wayland-server.h>
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struct wlr_screencopy_manager_v1 {
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struct wl_global *global;
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struct wl_list resources; // wl_resource
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struct wl_list frames; // wlr_screencopy_frame_v1::link
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struct wl_listener display_destroy;
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void *data;
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};
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struct wlr_screencopy_frame_v1 {
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struct wl_resource *resource;
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struct wlr_screencopy_manager_v1 *manager;
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struct wl_list link;
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int32_t width, height;
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struct wl_shm_buffer *buffer;
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struct wlr_output *output;
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struct wl_listener output_swap_buffers;
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void *data;
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};
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struct wlr_screencopy_manager_v1 *wlr_screencopy_manager_v1_create(
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struct wl_display *display);
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void wlr_screencopy_manager_v1_destroy(
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struct wlr_screencopy_manager_v1 *screencopy);
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#endif
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@ -0,0 +1,122 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<protocol name="wlr_screencopy_unstable_v1">
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<copyright>
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Copyright © 2018 Simon Ser
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice (including the next
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paragraph) shall be included in all copies or substantial portions of the
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Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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</copyright>
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<description summary="screen content capturing on client buffers">
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This protocol allows clients to ask the compositor to copy part of the
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screen content to a client buffer.
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</description>
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<interface name="zwlr_screencopy_manager_v1" version="1">
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<description summary="manager to inform clients and begin capturing">
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This object is a manager which offers requests to start capturing from a
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source.
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</description>
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<request name="capture_output">
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<description summary="start capturing">
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Request to start capturing from the given output.
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</description>
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<arg name="frame" type="new_id" interface="zwlr_screencopy_frame_v1"/>
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<arg name="output" type="object" interface="wl_output"/>
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</request>
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<request name="destroy" type="destructor">
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<description summary="destroy the manager">
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All objects created by the manager will still remain valid, until their
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appropriate destroy request has been called.
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</description>
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</request>
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</interface>
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<interface name="zwlr_screencopy_frame_v1" version="1">
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<description summary="a frame ready for copy">
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This object represents a frame which is ready to have its resources
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fetched and used.
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</description>
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<enum name="flags" bitfield="true">
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<entry name="y_invert" value="1" summary="contents are y-inverted"/>
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</enum>
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<event name="buffer">
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<description summary="buffer information">
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Provides information about the frame's buffer. This event is sent once
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as soon as the frame is created.
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The client should then create a buffer with the provided width and
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height, and send a copy request. It can optionally create a buffer with
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the preferred format and stride.
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</description>
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<arg name="width" type="uint" summary="buffer width"/>
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<arg name="height" type="uint" summary="buffer height"/>
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<arg name="flags" type="uint" enum="flags" summary="buffer flags"/>
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<arg name="format" type="uint" summary="preferred DRM_FORMAT"/>
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<arg name="stride" type="uint" summary="preferred stride"/>
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</event>
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<request name="copy">
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<description summary="copy the frame">
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Copy the frame to the supplied buffer. The buffer must have a the
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correct size, see zwlr_screencopy_frame_v1.buffer. The buffer needs to
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have a supported format.
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If the frame is successfully copied, a ready event is sent. Otherwise,
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an abort event is sent.
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</description>
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<arg name="buffer" type="object" interface="wl_buffer"/>
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</request>
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<enum name="error">
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<entry name="already_used" value="0"
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summary="the object has already been used to copy a wl_buffer"/>
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<entry name="invalid_format" value="1" summary="format not supported"/>
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<entry name="invalid_dimensions" value="2"
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summary="invalid width or height"/>
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</enum>
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<event name="ready">
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<description summary="indicates frame is available for reading">
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Called as soon as the frame is copied, indicating it is available
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for reading.
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Upon receiving this event, the client should destroy the object.
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</description>
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</event>
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<event name="failed">
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<description summary="frame copy failed">
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This event indicates that the attempted frame copy has failed.
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Upon receiving this event, the client should destroy the object.
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</description>
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</event>
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<request name="destroy" type="destructor">
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<description summary="delete this object, used or not">
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Destroys the frame.
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</description>
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</request>
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</interface>
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</protocol>
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@ -0,0 +1,250 @@
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#include <assert.h>
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#include <stdlib.h>
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#include <wlr/render/wlr_renderer.h>
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#include <wlr/types/wlr_output.h>
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#include <wlr/types/wlr_screencopy_v1.h>
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#include <wlr/backend.h>
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#include "wlr-screencopy-unstable-v1-protocol.h"
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#define SCREENCOPY_MANAGER_VERSION 1
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static const struct zwlr_screencopy_frame_v1_interface frame_impl;
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static struct wlr_screencopy_frame_v1 *frame_from_resource(
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struct wl_resource *resource) {
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assert(wl_resource_instance_of(resource,
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&zwlr_screencopy_frame_v1_interface, &frame_impl));
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return wl_resource_get_user_data(resource);
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}
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static void frame_handle_output_swap_buffers(struct wl_listener *listener,
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void *_data) {
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struct wlr_screencopy_frame_v1 *frame =
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wl_container_of(listener, frame, output_swap_buffers);
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struct wlr_output *output = frame->output;
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struct wlr_renderer *renderer = wlr_backend_get_renderer(output->backend);
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wl_list_remove(&frame->output_swap_buffers.link);
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wl_list_init(&frame->output_swap_buffers.link);
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if (output->width != frame->width || output->height != frame->height) {
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zwlr_screencopy_frame_v1_send_failed(frame->resource);
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return;
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}
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struct wl_shm_buffer *buffer = frame->buffer;
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assert(buffer != NULL);
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enum wl_shm_format fmt = wl_shm_buffer_get_format(buffer);
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int32_t width = wl_shm_buffer_get_width(buffer);
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int32_t height = wl_shm_buffer_get_height(buffer);
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int32_t stride = wl_shm_buffer_get_stride(buffer);
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wl_shm_buffer_begin_access(buffer);
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void *data = wl_shm_buffer_get_data(buffer);
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bool ok = wlr_renderer_read_pixels(renderer, fmt, stride, width, height,
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0, 0, 0, 0, data);
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wl_shm_buffer_end_access(buffer);
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if (!ok) {
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zwlr_screencopy_frame_v1_send_failed(frame->resource);
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return;
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}
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zwlr_screencopy_frame_v1_send_ready(frame->resource);
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// TODO: make frame resource inert
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}
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static void frame_handle_copy(struct wl_client *client,
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struct wl_resource *frame_resource,
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struct wl_resource *buffer_resource) {
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struct wlr_screencopy_frame_v1 *frame = frame_from_resource(frame_resource);
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struct wlr_output *output = frame->output;
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struct wlr_renderer *renderer = wlr_backend_get_renderer(output->backend);
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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);
|
||||
}
|
||||
Loading…
Reference in new issue