emersion
8 years ago
parent
1c8b72e0cd
commit
35f9700251
@ -0,0 +1,292 @@
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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 <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 <cairo.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;
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static struct orbital_screenshooter *screenshooter;
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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
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display_handle_geometry(void *data,
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struct wl_output *wl_output,
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int x,
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int y,
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int physical_width,
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int physical_height,
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int subpixel,
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const char *make,
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const char *model,
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int transform)
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{
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struct screenshooter_output *output;
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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
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display_handle_mode(void *data,
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struct wl_output *wl_output,
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uint32_t flags,
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int width,
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int height,
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int refresh)
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{
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struct screenshooter_output *output;
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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 const struct wl_output_listener output_listener = {
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display_handle_geometry,
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display_handle_mode
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};
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static void
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screenshot_done(void *data, struct orbital_screenshot *screenshot)
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{
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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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screenshot_done
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};
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static void
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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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{
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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,
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&wl_output_interface, 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,
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1);
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}
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}
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static void
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handle_global_remove(void *data, struct wl_registry *registry, uint32_t name)
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{
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/* XXX: unimplemented */
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}
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static const struct wl_registry_listener registry_listener = {
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handle_global,
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handle_global_remove
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};
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static struct wl_buffer *
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create_shm_buffer(int width, int height, void **data_out)
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{
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struct wl_shm_pool *pool;
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struct wl_buffer *buffer;
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int fd, size, stride;
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void *data;
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stride = width * 4;
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size = stride * height;
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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",
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size);
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return NULL;
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}
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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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pool = wl_shm_create_pool(shm, fd, size);
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close(fd);
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buffer = wl_shm_pool_create_buffer(pool, 0, width, height, stride,
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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
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write_png(int width, int height)
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{
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int output_stride, buffer_stride, i;
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cairo_surface_t *surface;
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void *data, *d, *s;
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struct screenshooter_output *output, *next;
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buffer_stride = width * 4;
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data = calloc(1, buffer_stride * height);
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if (!data)
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return;
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wl_list_for_each_safe(output, next, &output_list, link) {
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output_stride = output->width * 4;
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s = output->data;
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d = data + (output->offset_y - min_y) * buffer_stride +
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(output->offset_x - min_x) * 4;
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for (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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surface = cairo_image_surface_create_for_data(data,
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CAIRO_FORMAT_ARGB32,
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width, height, buffer_stride);
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cairo_surface_write_to_png(surface, "wayland-screenshot.png");
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cairo_surface_destroy(surface);
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free(data);
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}
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static int
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set_buffer_size(int *width, int *height)
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{
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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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*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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{
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struct wl_display *display;
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struct wl_registry *registry;
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struct screenshooter_output *output;
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int width, height;
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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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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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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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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_png(width, height);
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return 0;
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}
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