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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program 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 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 General Public License for more details.
*
* You should have received a copy of the GNU 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.
*
*/
#include "common/debug.h"
#include "common/stream.h"
#include "image/png.h"
#include "graphics/surface.h"
#include "sludge/allfiles.h"
#include "sludge/hsi.h"
#include "sludge/imgloader.h"
#include "sludge/sludge.h"
namespace Sludge {
bool ImgLoader::loadImage(Common::SeekableReadStream *stream, Graphics::Surface *dest, int reserve) {
debugC(3, kSludgeDebugGraphics, "Loading image at position: %i", stream->pos());
int32 start_ptr = stream->pos();
if (!loadPNGImage(stream, dest)) {
stream->seek(start_ptr);
if (!loadHSIImage(stream, dest, reserve)) {
return false;
}
}
return true;
}
bool ImgLoader::loadPNGImage(Common::SeekableReadStream *stream, Graphics::Surface *dest, bool checkSig) {
::Image::PNGDecoder png;
// set skip signature
if (!checkSig) {
png.setSkipSignature(true);
}
if (!png.loadStream(*stream))
return false;
// set value back
if (!checkSig) {
png.setSkipSignature(false);
}
const Graphics::Surface *sourceSurface = png.getSurface();
Graphics::Surface *pngSurface = sourceSurface->convertTo(*g_sludge->getScreenPixelFormat(), png.getPalette());
dest->copyFrom(*pngSurface);
pngSurface->free();
delete pngSurface;
return true;
}
bool ImgLoader::loadHSIImage(Common::SeekableReadStream *stream, Graphics::Surface *dest, int reserve) {
HSIDecoder hsiDecoder;
hsiDecoder.setReserve(reserve);
if (!hsiDecoder.loadStream(*stream)) {
return false;
}
dest->copyFrom(*(hsiDecoder.getSurface()));
return true;
}
} // End of namespace Sludge
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