/* Convert 1 to 4-band 8 or 16-bit VIPS images to/from PNG.
 *
 * 19/12/11
 * 	- just a stub
 */

/*

	This file is part of VIPS.

	VIPS 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 program 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 this program; if not, write to the Free Software
	Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
	02110-1301  USA

 */

/*

	These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk

 */

/*
#define DEBUG
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <glib/gi18n-lib.h>

#include <stdio.h>

#include <vips/vips.h>
#include <vips/vips7compat.h>
#include <vips/internal.h>

#include "../foreign/pforeign.h"

int
im_png2vips(const char *name, IMAGE *out)
{
	char filename[FILENAME_MAX];
	char mode[FILENAME_MAX];
	VipsImage *x;

	im_filename_split(name, filename, mode);

	if (vips_pngload(filename, &x, NULL))
		return -1;
	if (vips_image_write(x, out)) {
		VIPS_UNREF(x);
		return -1;
	}
	VIPS_UNREF(x);

	return 0;
}

static int
ispng(const char *filename)
{
	return vips_foreign_is_a("pngload", filename);
}

static const char *png_suffs[] = { ".png", NULL };

typedef VipsFormat VipsFormatPng;
typedef VipsFormatClass VipsFormatPngClass;

static void
vips_format_png_class_init(VipsFormatPngClass *class)
{
	VipsObjectClass *object_class = (VipsObjectClass *) class;
	VipsFormatClass *format_class = (VipsFormatClass *) class;

	object_class->nickname = "png";
	object_class->description = _("PNG");

	format_class->is_a = ispng;
	format_class->load = im_png2vips;
	format_class->save = im_vips2png;
	format_class->suffs = png_suffs;
}

static void
vips_format_png_init(VipsFormatPng *object)
{
}

G_DEFINE_TYPE(VipsFormatPng, vips_format_png, VIPS_TYPE_FORMAT);
