224 lines
5.9 KiB
C
224 lines
5.9 KiB
C
/*
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* Copyright © 2008 Kristian Høgsberg
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#include <stdint.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <cairo.h>
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#include <wayland-client.h>
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#include "screenshooter-client-protocol.h"
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#define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
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/* The screenshooter is a good example of a custom object exposed by
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* the compositor and serves as a test bed for implementing client
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* side marshalling outside libwayland.so */
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static struct wl_shm *shm;
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static struct screenshooter *screenshooter;
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static struct wl_list output_list;
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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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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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{
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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 screenshooter *screenshooter)
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{
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buffer_copy_done = 1;
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}
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static const struct screenshooter_listener screenshooter_listener = {
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screenshot_done
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};
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static void
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handle_global(struct wl_display *display, uint32_t id,
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const char *interface, uint32_t version, void *data)
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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 = malloc(sizeof *output);
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output->output = wl_display_bind(display, id, &wl_output_interface);
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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_display_bind(display, id, &wl_shm_interface);
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} else if (strcmp(interface, "screenshooter") == 0) {
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screenshooter = wl_display_bind(display, id, &screenshooter_interface);
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}
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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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char filename[] = "/tmp/wayland-shm-XXXXXX";
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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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fd = mkstemp(filename);
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if (fd < 0) {
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fprintf(stderr, "open %s failed: %m\n", filename);
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return NULL;
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}
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stride = width * 4;
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size = stride * height;
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if (ftruncate(fd, size) < 0) {
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fprintf(stderr, "ftruncate failed: %m\n");
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close(fd);
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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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unlink(filename);
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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, void *data)
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{
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cairo_surface_t *surface;
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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, width * 4);
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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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}
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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_buffer *buffer;
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void *data = NULL;
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struct screenshooter_output *output, *next;
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int width = 0, height = 0;
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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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wl_display_add_global_listener(display, handle_global, &screenshooter);
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wl_display_iterate(display, WL_DISPLAY_READABLE);
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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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screenshooter_add_listener(screenshooter, &screenshooter_listener, screenshooter);
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wl_list_for_each(output, &output_list, link) {
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width = MAX(width, output->offset_x + output->width);
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height = MAX(height, output->offset_y + output->height);
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}
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buffer = create_shm_buffer(width, height, &data);
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wl_list_for_each_safe(output, next, &output_list, link) {
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screenshooter_shoot(screenshooter, output->output, buffer);
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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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free(output);
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}
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write_png(width, height, data);
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return 0;
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}
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