gtk/tools/gtk-rendernode-tool-render.c
Benjamin Otte 1e75fc35c8 tools: No need for --force when specifying filename
If people specify the filename, they should know what they're doing.

If they don't, abort if the guessed filename already exists and insist
on the user explicitly giving it.
2023-07-22 23:30:15 +02:00

165 lines
4.3 KiB
C

/* Copyright 2023 Red Hat, Inc.
*
* GTK is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* GTK is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with GTK; see the file COPYING. If not,
* see <http://www.gnu.org/licenses/>.
*
* Author: Matthias Clasen
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <glib/gi18n-lib.h>
#include <glib/gprintf.h>
#include <glib/gstdio.h>
#include <gtk/gtk.h>
#include "gtk-rendernode-tool.h"
static char *
get_save_filename (const char *filename)
{
int length = strlen (filename);
const char *extension = ".png";
char *result;
if (strcmp (filename + (length - strlen (".node")), ".node") == 0)
{
char *basename = g_strndup (filename, length - strlen (".node"));
result = g_strconcat (basename, extension, NULL);
g_free (basename);
}
else
result = g_strconcat (filename, extension, NULL);
return result;
}
static void
render_file (const char *filename,
const char *renderer_name,
const char *save_file)
{
GskRenderNode *node;
GBytes *bytes;
GdkTexture *texture;
char *save_to;
GskRenderer *renderer;
GdkSurface *window;
GError *error = NULL;
node = load_node_file (filename);
if (renderer_name)
g_object_set_data_full (G_OBJECT (gdk_display_get_default ()), "gsk-renderer",
g_strdup (renderer_name), g_free);
window = gdk_surface_new_toplevel (gdk_display_get_default ());
renderer = gsk_renderer_new_for_surface (window);
texture = gsk_renderer_render_texture (renderer, node, NULL);
save_to = (char *)save_file;
if (save_to == NULL)
{
save_to = get_save_filename (filename);
if (g_file_test (save_to, G_FILE_TEST_EXISTS))
{
g_printerr (_("File %s exists.\n"
"If you want to overwrite, specify the filename.\n"), save_to);
exit (1);
}
}
bytes = gdk_texture_save_to_png_bytes (texture);
if (g_file_set_contents (save_to,
g_bytes_get_data (bytes, NULL),
g_bytes_get_size (bytes),
&error))
{
if (save_file == NULL)
g_print (_("Output written to %s.\n"), save_to);
}
else
{
g_printerr (_("Failed to save %s: %s\n"), save_to, error->message);
exit (1);
}
g_bytes_unref (bytes);
if (save_to != save_file)
g_free (save_to);
g_object_unref (texture);
gsk_render_node_unref (node);
}
void
do_render (int *argc,
const char ***argv)
{
GOptionContext *context;
char **filenames = NULL;
char *renderer = NULL;
const GOptionEntry entries[] = {
{ "renderer", 0, 0, G_OPTION_ARG_STRING, &renderer, N_("Renderer to use"), N_("RENDERER") },
{ G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &filenames, NULL, N_("FILE…") },
{ NULL, }
};
GError *error = NULL;
if (gdk_display_get_default () == NULL)
{
g_printerr (_("Could not initialize windowing system\n"));
exit (1);
}
g_set_prgname ("gtk4-rendernode-tool render");
context = g_option_context_new (NULL);
g_option_context_set_translation_domain (context, GETTEXT_PACKAGE);
g_option_context_add_main_entries (context, entries, NULL);
g_option_context_set_summary (context, _("Render a .node file to an image."));
if (!g_option_context_parse (context, argc, (char ***)argv, &error))
{
g_printerr ("%s\n", error->message);
g_error_free (error);
exit (1);
}
g_option_context_free (context);
if (filenames == NULL)
{
g_printerr (_("No .node file specified\n"));
exit (1);
}
if (g_strv_length (filenames) > 2)
{
g_printerr (_("Can only render a single .node file to a single output file\n"));
exit (1);
}
render_file (filenames[0], renderer, filenames[1]);
g_strfreev (filenames);
}