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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* GdkPixbuf library - Win32 GDI+ Pixbuf Loader
*
* Copyright (C) 2008 Dominic Lachowicz
* Copyright (C) 2008 Alberto Ruiz
*
* Authors: Dominic Lachowicz <domlachowicz@gmail.com>
* Alberto Ruiz <aruiz@gnome.org>
*
* This library 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.
*
* This library 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 * You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#define INITGUID
#include "io-gdip-utils.h"
DEFINE_GUID(EncoderCompression, 0xe09d739d,0xccd4,0x44ee,0x8e,0xba,0x3f,0xbf,0x8b,0xe4,0xfc,0x58);
static gboolean
gdk_pixbuf__gdip_image_save_PNG_to_callback (GdkPixbufSaveFunc save_func,
gpointer user_data,
GdkPixbuf *pixbuf,
gchar **keys,
gchar **values,
GError **error)
{
EncoderParameters encoder_params;
LONG compression = 5;
if (keys && *keys) {
gchar **kiter = keys;
gchar **viter = values;
while (*kiter) {
if (strncmp (*kiter, "tEXt::", 6) == 0) {
/* TODO: support exif data and the like */
}
else if (strcmp (*kiter, "compression") == 0) {
char *endptr = NULL;
compression = strtol (*viter, &endptr, 10);
if (endptr == *viter) {
g_set_error (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_BAD_OPTION,
_("PNG compression level must be a value between 0 and 9; value '%s' could not be parsed."),
*viter);
return FALSE;
}
if (compression < 0 || compression > 9) {
/* This is a user-visible error;
* lets people skip the range-checking
* in their app.
*/
g_set_error (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_BAD_OPTION,
_("PNG compression level must be a value between 0 and 9; value '%d' is not allowed."),
(int)compression);
return FALSE;
}
} else {
g_warning ("Unrecognized parameter (%s) passed to PNG saver.", *kiter);
}
++kiter;
++viter;
}
}
encoder_params.Count = 1;
encoder_params.Parameter[0].Guid = EncoderCompression;
encoder_params.Parameter[0].Type = EncoderParameterValueTypeLong;
encoder_params.Parameter[0].NumberOfValues = 1;
encoder_params.Parameter[0].Value = &compression;
return gdip_save_pixbuf (pixbuf, L"image/png", &encoder_params, save_func, user_data, error);
}
static gboolean
gdk_pixbuf__gdip_image_save_PNG (FILE *f,
GdkPixbuf *pixbuf,
gchar **keys,
gchar **values,
GError **error)
{
return gdk_pixbuf__gdip_image_save_PNG_to_callback (gdip_save_to_file_callback, f, pixbuf, keys, values, error);
}
#ifndef INCLUDE_gdip_png
#define MODULE_ENTRY(function) G_MODULE_EXPORT void function
#else
#define MODULE_ENTRY(function) void _gdk_pixbuf__gdip_png_ ## function
#endif
MODULE_ENTRY (fill_vtable) (GdkPixbufModule *module)
{
gdip_fill_vtable (module);
module->save_to_callback = gdk_pixbuf__gdip_image_save_PNG_to_callback;
module->save = gdk_pixbuf__gdip_image_save_PNG; /* for gtk < 2.14, you need to implement both. otherwise gdk-pixbuf-queryloaders fails */
}
MODULE_ENTRY (fill_info) (GdkPixbufFormat *info)
{
static GdkPixbufModulePattern signature[] = {
{ "\x89PNG\r\n\x1a\x0a", NULL, 100 }, /* PNG */
{ NULL, NULL, 0 }
};
static gchar *mime_types[] = {
"image/png",
NULL
};
static gchar *extensions[] = {
"png",
NULL
};
info->name = "png";
info->signature = signature;
info->description = _("The PNG image format");
info->mime_types = mime_types;
info->extensions = extensions;
info->flags = GDK_PIXBUF_FORMAT_WRITABLE | GDK_PIXBUF_FORMAT_THREADSAFE;
info->license = "LGPL";
}
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