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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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <glib/gi18n-lib.h>
#define INITGUID
#include "io-gdip-utils.h"
DEFINE_GUID(EncoderQuality, 0x1d5be4b5,0xfa4a,0x452d,0x9c,0xdd,0x5d,0xb3,0x51,0x05,0xe7,0xeb);
static gboolean
gdk_pixbuf__gdip_image_save_JPEG_to_callback (GdkPixbufSaveFunc save_func,
gpointer user_data,
GdkPixbuf *pixbuf,
gchar **keys,
gchar **values,
GError **error)
{
EncoderParameters encoder_params;
LONG quality = 75; /* default; must be between 0 and 100 */
if (keys && *keys) {
gchar **kiter = keys;
gchar **viter = values;
while (*kiter) {
if (strcmp (*kiter, "quality") == 0) {
char *endptr = NULL;
quality = strtol (*viter, &endptr, 10);
if (endptr == *viter) {
g_set_error (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_BAD_OPTION,
_("JPEG quality must be a value between 0 and 100; value '%s' could not be parsed."),
*viter);
return FALSE;
}
if (quality < 0 ||
quality > 100) {
/* 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,
_("JPEG quality must be a value between 0 and 100; value '%d' is not allowed."),
(int)quality);
return FALSE;
}
} else {
g_warning ("Unrecognized parameter (%s) passed to JPEG saver.", *kiter);
}
++kiter;
++viter;
}
}
encoder_params.Count = 1;
encoder_params.Parameter[0].Guid = EncoderQuality;
encoder_params.Parameter[0].Type = EncoderParameterValueTypeLong;
encoder_params.Parameter[0].NumberOfValues = 1;
encoder_params.Parameter[0].Value = &quality;
return gdip_save_pixbuf (pixbuf, L"image/jpeg", &encoder_params, save_func, user_data, error);
}
static gboolean
gdk_pixbuf__gdip_image_save_JPEG (FILE *f,
GdkPixbuf *pixbuf,
gchar **keys,
gchar **values,
GError **error)
{
return gdk_pixbuf__gdip_image_save_JPEG_to_callback (gdip_save_to_file_callback, f, pixbuf, keys, values, error);
}
static gboolean
gdk_pixbuf__gdip_is_save_option_supported_JPEG (const gchar *option_key)
{
if (g_strcmp0 (option_key, "quality") == 0)
return TRUE;
return FALSE;
}
#ifndef INCLUDE_gdiplus
#define MODULE_ENTRY(function) G_MODULE_EXPORT void function
#else
#define MODULE_ENTRY(function) void _gdk_pixbuf__gdip_jpeg_ ## function
#endif
MODULE_ENTRY (fill_vtable) (GdkPixbufModule *module)
{
gdip_fill_vtable (module);
module->save_to_callback = gdk_pixbuf__gdip_image_save_JPEG_to_callback;
module->save = gdk_pixbuf__gdip_image_save_JPEG; /* for gtk < 2.14, you need to implement both. otherwise gdk-pixbuf-queryloaders fails */
module->is_save_option_supported = gdk_pixbuf__gdip_is_save_option_supported_JPEG;
}
MODULE_ENTRY (fill_info) (GdkPixbufFormat *info)
{
static const GdkPixbufModulePattern signature[] = {
{ "\xff\xd8", NULL, 100 }, /* JPEG */
{ NULL, NULL, 0 }
};
static const gchar *mime_types[] = {
"image/jpeg",
NULL
};
static const gchar *extensions[] = {
"jpeg",
"jpe",
"jpg",
NULL
};
info->name = "jpeg";
info->signature = (GdkPixbufModulePattern *) signature;
info->description = NC_("image format", "JPEG");
info->mime_types = (gchar **) mime_types;
info->extensions = (gchar **) extensions;
info->flags = GDK_PIXBUF_FORMAT_WRITABLE | GDK_PIXBUF_FORMAT_THREADSAFE;
info->license = "LGPL";
}
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