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/*
* Copyright (c) 2009, The Mozilla Foundation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the Mozilla Foundation nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY The Mozilla Foundation ''AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL The Mozilla Foundation BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Contributors:
* Ted Mielczarek <ted.mielczarek@gmail.com>
* Karl Tomlinson <karlt+@karlt.net>
*/
/*
* gdk-screenshot.cpp: Save a screenshot of the root window in .png format.
* If a filename is specified as the first argument on the commandline,
* then the image will be saved to that filename. Otherwise, the image will
* be written to stdout.
*/
#include <gdk/gdk.h>
#ifdef MOZ_WAYLAND
# include <gdk/gdkwayland.h>
# include "mozilla/GUniquePtr.h"
# include "mozilla/UniquePtrExtensions.h"
# include "mozilla/ScopeExit.h"
#endif
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
gboolean save_to_stdout(const gchar* buf, gsize count, GError** error,
gpointer data) {
size_t written = fwrite(buf, 1, count, stdout);
if (written != count) {
g_set_error(error, G_FILE_ERROR, g_file_error_from_errno(errno),
"Write to stdout failed: %s", g_strerror(errno));
return FALSE;
}
return TRUE;
}
#if defined(MOZ_WAYLAND)
static GdkPixbuf* get_screenshot_gnome(char* aAppName) {
char* path =
g_build_filename(g_get_user_cache_dir(), "mozilla-screenshot", nullptr);
g_mkdir_with_parents(path, 0700);
char* tmpname = g_strdup_printf("mozilla-screen-%d.png", g_random_int());
char* filename = g_build_filename(path, tmpname, nullptr);
auto autoFree = mozilla::MakeScopeExit([&] {
unlink(filename);
g_free(path);
g_free(tmpname);
g_free(filename);
});
mozilla::GUniquePtr<GError> error;
char* argv[] = {g_strdup("/usr/bin/gnome-screenshot"), g_strdup("-f"),
filename, nullptr};
gboolean ret = g_spawn_sync(
nullptr, argv, nullptr, GSpawnFlags(G_SPAWN_LEAVE_DESCRIPTORS_OPEN),
nullptr, nullptr, nullptr, nullptr, nullptr, getter_Transfers(error));
if (!ret || error) {
fprintf(stderr, "%s: g_spawn_sync() of gnome-screenshot failed: %s\n",
aAppName, error ? error->message : "");
return nullptr;
}
GdkPixbuf* screenshot = gdk_pixbuf_new_from_file(filename, nullptr);
if (!screenshot) {
fprintf(stderr, "%s: gdk_pixbuf_new_from_file %s failed\n", aAppName,
filename);
}
return screenshot;
}
#endif
int main(int argc, char** argv) {
gdk_init(&argc, &argv);
GdkPixbuf* screenshot = nullptr;
#if defined(MOZ_WAYLAND)
GdkDisplay* display = gdk_display_get_default();
if (display && GDK_IS_WAYLAND_DISPLAY(display)) {
screenshot = get_screenshot_gnome(argv[0]);
if (!screenshot) {
fprintf(stderr, "%s: failed to create screenshot Wayland/GdkPixbuf\n",
argv[0]);
return 1;
}
}
#endif
if (!screenshot) {
GdkWindow* window = gdk_get_default_root_window();
screenshot =
gdk_pixbuf_get_from_window(window, 0, 0, gdk_window_get_width(window),
gdk_window_get_height(window));
if (!screenshot) {
fprintf(stderr, "%s: failed to create screenshot X11/GdkPixbuf\n",
argv[0]);
return 1;
}
}
GError* error = nullptr;
if (argc > 1) {
gdk_pixbuf_save(screenshot, argv[1], "png", &error, nullptr);
} else {
gdk_pixbuf_save_to_callback(screenshot, save_to_stdout, nullptr, "png",
&error, nullptr);
}
if (error) {
fprintf(stderr, "%s: failed to write screenshot as png: %s\n", argv[0],
error->message);
return error->code;
}
return 0;
}
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