/* === S Y N F I G ========================================================= */

/*!	\file mptr_cairo_png.cpp

**	\brief png Cairo Import Module

**

**	$Id$

**

**	\legal

**	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley

**	Copyright (c) 2012-2013 Carlos Lรณpez

**

**	This package is free software; you can redistribute it and/or

**	modify it under the terms of the GNU General Public License as

**	published by the Free Software Foundation; either version 2 of

**	the License, or (at your option) any later version.

**

**	This package 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

**	General Public License for more details.

**	\endlegal

**

** === N O T E S ===========================================================

**

** ========================================================================= */

/* === H E A D E R S ======================================================= */

#ifdef USING_PCH

#	include "pch.h"

#else

#ifdef HAVE_CONFIG_H

#	include <config.h></config.h>

#endif

#include "mptr_cairo_png.h"

#include <synfig cairoimporter.h=""></synfig>

#include <synfig time.h=""></synfig>

#include <synfig general.h=""></synfig>

#include <synfig localization.h=""></synfig>

#include <cstdio></cstdio>

#include <algorithm></algorithm>

#include <functional></functional>

#endif

/* === M A C R O S ========================================================= */

using namespace synfig;

using namespace std;

using namespace etl;

/* === G L O B A L S ======================================================= */

SYNFIG_CAIROIMPORTER_INIT(cairo_png_mptr);

SYNFIG_CAIROIMPORTER_SET_NAME(cairo_png_mptr,"cairo_png");

SYNFIG_CAIROIMPORTER_SET_EXT(cairo_png_mptr,"png");

SYNFIG_CAIROIMPORTER_SET_VERSION(cairo_png_mptr,"0.1");

SYNFIG_CAIROIMPORTER_SET_CVS_ID(cairo_png_mptr,"$Id$");

SYNFIG_CAIROIMPORTER_SET_SUPPORTS_FILE_SYSTEM_WRAPPER(cairo_png_mptr, true);

/* === M E T H O D S ======================================================= */

cairo_status_t

cairo_png_mptr::read_callback(void *closure, unsigned char *data, unsigned int length)

{

	unsigned int s = closure == NULL ? 0

				 : ((FileSystem::ReadStream*)closure)->read_block(data, length);

	if (s < length) {

		memset(data + s, 0, length - s);

		return CAIRO_STATUS_READ_ERROR;

	}

	return CAIRO_STATUS_SUCCESS;

}

cairo_png_mptr::cairo_png_mptr(const synfig::FileSystem::Identifier &identifier):

	CairoImporter(identifier)

{

	FileSystem::ReadStream::Handle stream = identifier.get_read_stream();

	csurface_=cairo_image_surface_create_from_png_stream(read_callback, stream.get());

	stream.reset();

	if(cairo_surface_status(csurface_))

	{

		throw strprintf("Unable to physically open %s",identifier.filename.c_str());

		cairo_surface_destroy(csurface_);

		csurface_=NULL;

		return;

	}

}

cairo_png_mptr::~cairo_png_mptr()

{

	if(csurface_ && !cairo_surface_status(csurface_))

		cairo_surface_destroy(csurface_);

}

bool

cairo_png_mptr::get_frame(cairo_surface_t *&csurface, const synfig::RendDesc &/*renddesc*/, Time, synfig::ProgressCallback */*cb*/)

{

	if(csurface_ && !cairo_surface_status(csurface_))

	{

		csurface=cairo_surface_reference(csurface_);

		return true;

	}

	else

		return false;

}

bool

cairo_png_mptr::get_frame(cairo_surface_t *&csurface, const synfig::RendDesc &/*renddesc*/, Time,

					bool &/*trimmed*/, unsigned int &/*width*/, unsigned int &/*height*/, unsigned int &/*top*/, unsigned int &/*left*/, synfig::ProgressCallback */*cb*/)

{

	if(csurface_ && !cairo_surface_status(csurface_))

	{

		csurface=cairo_surface_reference(csurface_);

		return true;

	}

	else

		return false;

}