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/*
* Copyright © 2008 Kristian Høgsberg
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/mman.h>
#include <cairo.h>
#include <wayland-client.h>
#include "screenshooter-client-protocol.h"
#define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
/* The screenshooter is a good example of a custom object exposed by
* the compositor and serves as a test bed for implementing client
* side marshalling outside libwayland.so */
static struct wl_shm *shm;
static struct screenshooter *screenshooter;
static struct wl_list output_list;
struct screenshooter_output {
struct wl_output *output;
struct wl_buffer *buffer;
int width, height, offset_x, offset_y;
struct wl_list link;
};
static void
display_handle_geometry(void *data,
struct wl_output *wl_output,
int x,
int y,
int physical_width,
int physical_height,
int subpixel,
const char *make,
const char *model)
{
struct screenshooter_output *output;
output = wl_output_get_user_data(wl_output);
if (wl_output == output->output) {
output->offset_x = x;
output->offset_y = y;
}
}
static void
display_handle_mode(void *data,
struct wl_output *wl_output,
uint32_t flags,
int width,
int height,
int refresh)
{
struct screenshooter_output *output;
output = wl_output_get_user_data(wl_output);
if (wl_output == output->output &&
(flags & WL_OUTPUT_MODE_CURRENT)) {
output->width = width;
output->height = height;
}
}
static const struct wl_output_listener output_listener = {
display_handle_geometry,
display_handle_mode
};
static void
handle_global(struct wl_display *display, uint32_t id,
const char *interface, uint32_t version, void *data)
{
static struct screenshooter_output *output;
if (strcmp(interface, "wl_output") == 0) {
output = malloc(sizeof *output);
output->output = wl_display_bind(display, id, &wl_output_interface);
wl_list_insert(&output_list, &output->link);
wl_output_add_listener(output->output, &output_listener, output);
} else if (strcmp(interface, "wl_shm") == 0) {
shm = wl_display_bind(display, id, &wl_shm_interface);
} else if (strcmp(interface, "screenshooter") == 0) {
screenshooter = wl_display_bind(display, id, &screenshooter_interface);
}
}
static struct wl_buffer *
create_shm_buffer(int width, int height, void **data_out)
{
char filename[] = "/tmp/wayland-shm-XXXXXX";
struct wl_shm_pool *pool;
struct wl_buffer *buffer;
int fd, size, stride;
void *data;
fd = mkstemp(filename);
if (fd < 0) {
fprintf(stderr, "open %s failed: %m\n", filename);
return NULL;
}
stride = width * 4;
size = stride * height;
if (ftruncate(fd, size) < 0) {
fprintf(stderr, "ftruncate failed: %m\n");
close(fd);
return NULL;
}
data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
unlink(filename);
if (data == MAP_FAILED) {
fprintf(stderr, "mmap failed: %m\n");
close(fd);
return NULL;
}
pool = wl_shm_create_pool(shm, fd, size);
close(fd);
buffer = wl_shm_pool_create_buffer(pool, 0, width, height, stride,
WL_SHM_FORMAT_XRGB8888);
wl_shm_pool_destroy(pool);
*data_out = data;
return buffer;
}
static void
write_png(int width, int height, void *data)
{
cairo_surface_t *surface;
surface = cairo_image_surface_create_for_data(data,
CAIRO_FORMAT_ARGB32,
width, height, width * 4);
cairo_surface_write_to_png(surface, "wayland-screenshot.png");
cairo_surface_destroy(surface);
}
int main(int argc, char *argv[])
{
struct wl_display *display;
struct wl_buffer *buffer;
void *data = NULL;
struct screenshooter_output *output, *next;
int ss_area_width = 0, ss_area_height = 0, num_outputs = 0;
display = wl_display_connect(NULL);
if (display == NULL) {
fprintf(stderr, "failed to create display: %m\n");
return -1;
}
wl_list_init(&output_list);
wl_display_add_global_listener(display, handle_global, &screenshooter);
wl_display_iterate(display, WL_DISPLAY_READABLE);
wl_display_roundtrip(display);
if (screenshooter == NULL) {
fprintf(stderr, "display doesn't support screenshooter\n");
return -1;
}
wl_list_for_each(output, &output_list, link) {
if (!num_outputs) {
ss_area_width = output->width + output->offset_x;
ss_area_height = output->height + output->offset_y;
}
else {
ss_area_width = MAX(ss_area_width, output->offset_x + output->width);
ss_area_height = MAX(ss_area_height, output->offset_y + output->height);
}
num_outputs++;
}
buffer = create_shm_buffer(ss_area_width, ss_area_height, &data);
wl_list_for_each(output, &output_list, link) {
screenshooter_shoot(screenshooter, output->output, buffer);
}
wl_display_roundtrip(display);
write_png(ss_area_width, ss_area_height, data);
wl_list_for_each_safe(output, next, &output_list, link) {
free(output);
}
return 0;
}
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