diff options
Diffstat (limited to 'examples/screencopy.c')
-rw-r--r-- | examples/screencopy.c | 266 |
1 files changed, 0 insertions, 266 deletions
diff --git a/examples/screencopy.c b/examples/screencopy.c deleted file mode 100644 index 42123e55..00000000 --- a/examples/screencopy.c +++ /dev/null @@ -1,266 +0,0 @@ -/* - * 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 _POSIX_C_SOURCE 200112L -#include <errno.h> -#include <fcntl.h> -#include <limits.h> -#include <png.h> -#include <stdbool.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <sys/mman.h> -#include <sys/param.h> -#include <sys/stat.h> -#include <sys/wait.h> -#include <unistd.h> -#include <assert.h> -#include <wayland-client-protocol.h> -#include "wlr-screencopy-unstable-v1-client-protocol.h" - -struct format { - enum wl_shm_format wl_format; - bool is_bgr; -}; - -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; - enum wl_shm_format format; - int width, height, stride; - bool y_invert; -} buffer; -bool buffer_copy_done = false; - -// wl_shm_format describes little-endian formats, libpng uses big-endian -// formats (so Wayland's ABGR is libpng's RGBA). -static const struct format formats[] = { - {WL_SHM_FORMAT_XRGB8888, true}, - {WL_SHM_FORMAT_ARGB8888, true}, - {WL_SHM_FORMAT_XBGR8888, false}, - {WL_SHM_FORMAT_ABGR8888, false}, -}; - -static struct wl_buffer *create_shm_buffer(enum wl_shm_format fmt, - int width, int height, int stride, void **data_out) { - int size = stride * height; - - const char shm_name[] = "/wlroots-screencopy"; - int fd = shm_open(shm_name, O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR); - if (fd < 0) { - fprintf(stderr, "shm_open failed\n"); - return NULL; - } - shm_unlink(shm_name); - - int ret; - while ((ret = ftruncate(fd, size)) == EINTR) { - // No-op - } - if (ret < 0) { - close(fd); - fprintf(stderr, "ftruncate failed\n"); - return NULL; - } - - void *data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); - if (data == MAP_FAILED) { - perror("mmap failed"); - 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, fmt); - wl_shm_pool_destroy(pool); - - *data_out = data; - return buffer; -} - -static void frame_handle_buffer(void *data, - struct zwlr_screencopy_frame_v1 *frame, uint32_t format, - uint32_t width, uint32_t height, uint32_t stride) { - buffer.format = format; - buffer.width = width; - buffer.height = height; - buffer.stride = stride; - - // Make sure the buffer is not allocated - assert(!buffer.wl_buffer); - buffer.wl_buffer = - create_shm_buffer(format, width, height, 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_flags(void *data, - struct zwlr_screencopy_frame_v1 *frame, uint32_t flags) { - buffer.y_invert = flags & ZWLR_SCREENCOPY_FRAME_V1_FLAGS_Y_INVERT; -} - -static void frame_handle_ready(void *data, - struct zwlr_screencopy_frame_v1 *frame, uint32_t tv_sec_hi, - uint32_t tv_sec_lo, uint32_t tv_nsec) { - 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, - .flags = frame_handle_flags, - .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(char *filename, enum wl_shm_format wl_fmt, int width, - int height, int stride, bool y_invert, png_bytep data) { - const struct format *fmt = NULL; - for (size_t i = 0; i < sizeof(formats) / sizeof(formats[0]); ++i) { - if (formats[i].wl_format == wl_fmt) { - fmt = &formats[i]; - break; - } - } - if (fmt == NULL) { - fprintf(stderr, "unsupported format %"PRIu32"\n", wl_fmt); - exit(EXIT_FAILURE); - } - - FILE *f = fopen(filename, "wb"); - if (f == NULL) { - fprintf(stderr, "failed to open output file\n"); - exit(EXIT_FAILURE); - } - - png_structp png = - png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); - png_infop info = png_create_info_struct(png); - - png_init_io(png, f); - - png_set_IHDR(png, info, width, height, 8, PNG_COLOR_TYPE_RGBA, - PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, - PNG_FILTER_TYPE_DEFAULT); - - if (fmt->is_bgr) { - png_set_bgr(png); - } - - png_write_info(png, info); - - for (size_t i = 0; i < (size_t)height; ++i) { - png_bytep row; - if (y_invert) { - row = data + (height - i - 1) * stride; - } else { - row = data + i * stride; - } - png_write_row(png, row); - } - - png_write_end(png, NULL); - - png_destroy_write_struct(&png, &info); - - fclose(f); -} - -int main(int argc, char *argv[]) { - struct wl_display * display = wl_display_connect(NULL); - if (display == NULL) { - perror("failed to create display"); - return EXIT_FAILURE; - } - - struct wl_registry *registry = wl_display_get_registry(display); - wl_registry_add_listener(registry, ®istry_listener, NULL); - 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, 0, output); - zwlr_screencopy_frame_v1_add_listener(frame, &frame_listener, NULL); - - while (!buffer_copy_done && wl_display_dispatch(display) != -1) { - // This space is intentionally left blank - } - - write_image("wayland-screenshot.png", buffer.format, buffer.width, - buffer.height, buffer.stride, buffer.y_invert, buffer.data); - wl_buffer_destroy(buffer.wl_buffer); - munmap(buffer.data, buffer.stride * buffer.height); - - return EXIT_SUCCESS; -} |