Drew DeVault
7 years ago
committed by
GitHub
commit
9e1ff2dce9
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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 <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/wait.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <wayland-client.h>
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#include <limits.h>
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#include <sys/param.h>
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#include <screenshooter-client-protocol.h>
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#include "../backend/wayland/os-compatibility.c"
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static struct wl_shm *shm = NULL;
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static struct orbital_screenshooter *screenshooter = NULL;
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static struct wl_list output_list;
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int min_x, min_y, max_x, max_y;
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int buffer_copy_done;
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struct screenshooter_output {
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struct wl_output *output;
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struct wl_buffer *buffer;
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int width, height, offset_x, offset_y;
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void *data;
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struct wl_list link;
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};
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static void output_handle_geometry(void *data, struct wl_output *wl_output,
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int x, int y, int physical_width, int physical_height, int subpixel,
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const char *make, const char *model, int transform) {
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struct screenshooter_output *output = wl_output_get_user_data(wl_output);
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if (wl_output == output->output) {
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output->offset_x = x;
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output->offset_y = y;
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}
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}
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static void output_handle_mode(void *data, struct wl_output *wl_output,
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uint32_t flags, int width, int height, int refresh) {
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struct screenshooter_output *output = wl_output_get_user_data(wl_output);
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if (wl_output == output->output && (flags & WL_OUTPUT_MODE_CURRENT)) {
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output->width = width;
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output->height = height;
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}
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}
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static void output_handle_done(void *data, struct wl_output *wl_output) {
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}
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static const struct wl_output_listener output_listener = {
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.geometry = output_handle_geometry,
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.mode = output_handle_mode,
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.done = output_handle_done,
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};
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static void screenshot_done(void *data, struct orbital_screenshot *screenshot) {
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buffer_copy_done = 1;
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}
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static const struct orbital_screenshot_listener screenshot_listener = {
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.done = screenshot_done,
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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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static struct screenshooter_output *output;
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if (strcmp(interface, "wl_output") == 0) {
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output = calloc(1, sizeof *output);
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output->output = wl_registry_bind(registry, name, &wl_output_interface,
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1);
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wl_list_insert(&output_list, &output->link);
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wl_output_add_listener(output->output, &output_listener, output);
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} else if (strcmp(interface, "wl_shm") == 0) {
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shm = wl_registry_bind(registry, name, &wl_shm_interface, 1);
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} else if (strcmp(interface, "orbital_screenshooter") == 0) {
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screenshooter = wl_registry_bind(registry, name,
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&orbital_screenshooter_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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// Unimplemented
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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 struct wl_buffer *create_shm_buffer(int width, int height,
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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 = os_create_anonymous_file(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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return buffer;
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}
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static void argb_to_rgba(uint32_t *data, size_t height, size_t stride) {
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size_t n = height*stride/4;
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for (size_t i = 0; i < n; ++i) {
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uint32_t v = data[i];
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uint32_t rgb = v & 0x00ffffff;
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uint32_t a = (v & 0xff000000) >> 24;
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data[i] = (rgb << 8) | a;
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}
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}
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static void write_image(const char *filename, int width, int height) {
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int buffer_stride = width * 4;
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void *data = calloc(1, buffer_stride * height);
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if (!data) {
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return;
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}
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struct screenshooter_output *output, *next;
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wl_list_for_each_safe(output, next, &output_list, link) {
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int output_stride = output->width * 4;
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void *s = output->data;
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void *d = data + (output->offset_y - min_y) * buffer_stride +
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(output->offset_x - min_x) * 4;
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for (int i = 0; i < output->height; i++) {
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memcpy(d, s, output_stride);
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d += buffer_stride;
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s += output_stride;
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}
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free(output);
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}
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argb_to_rgba(data, height, buffer_stride);
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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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pipe(fd);
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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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write(fd[1], data, buffer_stride * height);
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close(fd[1]);
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free(data);
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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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execlp("convert", "convert", "-depth", "8", "-size", size, "rgba:-",
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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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static int set_buffer_size(int *width, int *height) {
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struct screenshooter_output *output;
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min_x = min_y = INT_MAX;
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max_x = max_y = INT_MIN;
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int position = 0;
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wl_list_for_each_reverse(output, &output_list, link) {
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output->offset_x = position;
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position += output->width;
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}
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wl_list_for_each(output, &output_list, link) {
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min_x = MIN(min_x, output->offset_x);
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min_y = MIN(min_y, output->offset_y);
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max_x = MAX(max_x, output->offset_x + output->width);
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max_y = MAX(max_y, output->offset_y + output->height);
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}
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if (max_x <= min_x || max_y <= min_y) {
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return -1;
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}
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*width = max_x - min_x;
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*height = max_y - min_y;
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return 0;
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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 -1;
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}
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wl_list_init(&output_list);
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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 (screenshooter == NULL) {
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fprintf(stderr, "display doesn't support screenshooter\n");
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return -1;
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}
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int width, height;
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if (set_buffer_size(&width, &height)) {
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fprintf(stderr, "cannot set buffer size\n");
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return -1;
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}
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struct screenshooter_output *output;
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wl_list_for_each(output, &output_list, link) {
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if (output->width == 0 || output->height == 0) {
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continue;
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}
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output->buffer = create_shm_buffer(output->width, output->height, &output->data);
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if (output->buffer == NULL) {
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return -1;
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}
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struct orbital_screenshot *screenshot = orbital_screenshooter_shoot(
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screenshooter, output->output, output->buffer);
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orbital_screenshot_add_listener(screenshot, &screenshot_listener, screenshot);
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buffer_copy_done = 0;
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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", width, height);
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return EXIT_SUCCESS;
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}
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@ -0,0 +1,26 @@
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#ifndef _WLR_SCREENSHOOTER_H
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#define _WLR_SCREENSHOOTER_H
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#include <wayland-server.h>
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struct wlr_screenshooter {
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struct wl_global *wl_global;
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struct wlr_renderer *renderer;
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void *data;
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};
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struct wlr_screenshot {
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struct wl_resource *resource;
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struct wl_resource *output_resource;
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struct wlr_output *output;
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struct wlr_screenshooter *screenshooter;
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void* data;
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};
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struct wlr_screenshooter *wlr_screenshooter_create(struct wl_display *display,
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struct wlr_renderer *renderer);
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void wlr_screenshooter_destroy(struct wlr_screenshooter *screenshooter);
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#endif
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@ -0,0 +1,16 @@
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<protocol name="orbital_screenshooter">
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<interface name="orbital_screenshooter" version="1">
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<request name="shoot">
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<arg name="id" type="new_id" interface="orbital_screenshot"/>
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<arg name="output" type="object" interface="wl_output"/>
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<arg name="buffer" type="object" interface="wl_buffer"/>
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</request>
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</interface>
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<interface name="orbital_screenshot" version="1">
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<event name="done">
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</event>
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</interface>
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</protocol>
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@ -0,0 +1,163 @@
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wayland-server.h>
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#include <wlr/render.h>
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#include <wlr/types/wlr_screenshooter.h>
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#include <wlr/types/wlr_output.h>
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#include <wlr/util/log.h>
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#include "screenshooter-protocol.h"
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static void copy_yflip(uint8_t *dst, uint8_t *src, int32_t height,
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int32_t stride) {
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uint8_t *end = dst + height * stride;
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while (dst < end) {
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memcpy(dst, src, stride);
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dst += stride;
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src -= stride;
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}
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}
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struct screenshot_state {
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int32_t width, height, stride;
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uint8_t *pixels;
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struct wl_shm_buffer *shm_buffer;
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struct wlr_screenshot *screenshot;
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struct wl_listener frame_listener;
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};
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static void output_frame_notify(struct wl_listener *listener, void *_data) {
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struct screenshot_state *state = wl_container_of(listener, state,
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frame_listener);
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struct wlr_renderer *renderer = state->screenshot->screenshooter->renderer;
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struct wlr_output *output = state->screenshot->output;
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wlr_output_make_current(output);
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wlr_renderer_read_pixels(renderer, 0, 0, output->width, output->height,
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state->pixels);
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void *data = wl_shm_buffer_get_data(state->shm_buffer);
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||||||
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wl_shm_buffer_begin_access(state->shm_buffer);
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copy_yflip(data, state->pixels + state->stride * (state->height - 1),
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state->height, state->stride);
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wl_shm_buffer_end_access(state->shm_buffer);
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free(state->pixels);
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wl_list_remove(&listener->link);
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||||||
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||||||
|
orbital_screenshot_send_done(state->screenshot->resource);
|
||||||
|
|
||||||
|
free(state);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void screenshooter_shoot(struct wl_client *client,
|
||||||
|
struct wl_resource *_screenshooter, uint32_t id,
|
||||||
|
struct wl_resource *_output, struct wl_resource *_buffer) {
|
||||||
|
struct wlr_screenshooter *screenshooter =
|
||||||
|
wl_resource_get_user_data(_screenshooter);
|
||||||
|
struct wlr_output *output = wl_resource_get_user_data(_output);
|
||||||
|
if (!wl_shm_buffer_get(_buffer)) {
|
||||||
|
wlr_log(L_ERROR, "Invalid buffer: not a shared memory buffer");
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
struct wl_shm_buffer *shm_buffer = wl_shm_buffer_get(_buffer);
|
||||||
|
int32_t width = wl_shm_buffer_get_width(shm_buffer);
|
||||||
|
int32_t height = wl_shm_buffer_get_height(shm_buffer);
|
||||||
|
int32_t stride = wl_shm_buffer_get_stride(shm_buffer);
|
||||||
|
if (width < output->width || height < output->height) {
|
||||||
|
wlr_log(L_ERROR, "Invalid buffer: too small");
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
uint32_t format = wl_shm_buffer_get_format(shm_buffer);
|
||||||
|
if (format != WL_SHM_FORMAT_XRGB8888) {
|
||||||
|
wlr_log(L_ERROR, "Invalid buffer: unsupported format");
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
uint8_t *pixels = malloc(stride * height);
|
||||||
|
if (pixels == NULL) {
|
||||||
|
wl_client_post_no_memory(client);
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
struct wlr_screenshot *screenshot =
|
||||||
|
calloc(1, sizeof(struct wlr_screenshot));
|
||||||
|
if (!screenshot) {
|
||||||
|
wl_client_post_no_memory(client);
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
screenshot->output_resource = _output;
|
||||||
|
screenshot->output = output;
|
||||||
|
screenshot->screenshooter = screenshooter;
|
||||||
|
screenshot->resource = wl_resource_create(client,
|
||||||
|
&orbital_screenshot_interface, wl_resource_get_version(_screenshooter),
|
||||||
|
id);
|
||||||
|
wlr_log(L_DEBUG, "new screenshot %p (res %p)", screenshot,
|
||||||
|
screenshot->resource);
|
||||||
|
wl_resource_set_implementation(screenshot->resource, NULL, screenshot,
|
||||||
|
NULL);
|
||||||
|
|
||||||
|
struct screenshot_state *state = calloc(1, sizeof(struct screenshot_state));
|
||||||
|
if (!state) {
|
||||||
|
wl_client_post_no_memory(client);
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
state->width = width;
|
||||||
|
state->height = height;
|
||||||
|
state->stride = stride;
|
||||||
|
state->pixels = pixels;
|
||||||
|
state->shm_buffer = shm_buffer;
|
||||||
|
state->screenshot = screenshot;
|
||||||
|
state->frame_listener.notify = output_frame_notify;
|
||||||
|
wl_signal_add(&output->events.swap_buffers, &state->frame_listener);
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct orbital_screenshooter_interface screenshooter_impl = {
|
||||||
|
.shoot = screenshooter_shoot,
|
||||||
|
};
|
||||||
|
|
||||||
|
static void screenshooter_bind(struct wl_client *wl_client,
|
||||||
|
void *_screenshooter, uint32_t version, uint32_t id) {
|
||||||
|
struct wlr_screenshooter *screenshooter = _screenshooter;
|
||||||
|
assert(wl_client && screenshooter);
|
||||||
|
if (version > 1) {
|
||||||
|
wlr_log(L_ERROR, "Client requested unsupported screenshooter version,"
|
||||||
|
"disconnecting");
|
||||||
|
wl_client_destroy(wl_client);
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
struct wl_resource *wl_resource = wl_resource_create(wl_client,
|
||||||
|
&orbital_screenshooter_interface, version, id);
|
||||||
|
wl_resource_set_implementation(wl_resource, &screenshooter_impl,
|
||||||
|
screenshooter, NULL);
|
||||||
|
}
|
||||||
|
|
||||||
|
struct wlr_screenshooter *wlr_screenshooter_create(struct wl_display *display,
|
||||||
|
struct wlr_renderer *renderer) {
|
||||||
|
struct wlr_screenshooter *screenshooter =
|
||||||
|
calloc(1, sizeof(struct wlr_screenshooter));
|
||||||
|
if (!screenshooter) {
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
screenshooter->renderer = renderer;
|
||||||
|
|
||||||
|
struct wl_global *wl_global = wl_global_create(display,
|
||||||
|
&orbital_screenshooter_interface, 1, screenshooter, screenshooter_bind);
|
||||||
|
if (!wl_global) {
|
||||||
|
free(screenshooter);
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
screenshooter->wl_global = wl_global;
|
||||||
|
|
||||||
|
return screenshooter;
|
||||||
|
}
|
||||||
|
|
||||||
|
void wlr_screenshooter_destroy(struct wlr_screenshooter *screenshooter) {
|
||||||
|
if (!screenshooter) {
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
// TODO: this segfault (wl_display->registry_resource_list is not init)
|
||||||
|
// wl_global_destroy(screenshooter->wl_global);
|
||||||
|
free(screenshooter);
|
||||||
|
}
|
||||||
Loading…
Reference in new issue