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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.
*
* $URL$
* $Id$
*
*/
#include "common/system.h"
#include "graphics/conversion.h" // For YUV2RGB
#include "mohawk/jpeg.h"
namespace Mohawk {
JPEGDecoder::JPEGDecoder(bool freeSurfaceAfterUse) : Graphics::Codec(), _freeSurfaceAfterUse(freeSurfaceAfterUse) {
_jpeg = new Graphics::JPEG();
_pixelFormat = g_system->getScreenFormat();
_surface = NULL;
}
JPEGDecoder::~JPEGDecoder() {
delete _jpeg;
if (_surface) {
_surface->free();
delete _surface;
}
}
Graphics::Surface *JPEGDecoder::decodeImage(Common::SeekableReadStream* stream) {
_jpeg->read(stream);
Graphics::Surface *ySurface = _jpeg->getComponent(1);
Graphics::Surface *uSurface = _jpeg->getComponent(2);
Graphics::Surface *vSurface = _jpeg->getComponent(3);
Graphics::Surface *destSurface = NULL;
// If we should free the surface after use, use the internal _surface storage
// (this should be used when using as a Codec, as the Codecs should free their
// surfaces when deleting the Codec object). Otherwise, create a new Surface
// as the destination.
if (_freeSurfaceAfterUse) {
if (!_surface) {
_surface = new Graphics::Surface();
_surface->create(ySurface->w, ySurface->h, _pixelFormat.bytesPerPixel);
}
destSurface = _surface;
} else {
destSurface = new Graphics::Surface();
destSurface->create(ySurface->w, ySurface->h, _pixelFormat.bytesPerPixel);
}
assert(destSurface);
for (uint16 i = 0; i < destSurface->h; i++) {
for (uint16 j = 0; j < destSurface->w; j++) {
byte r = 0, g = 0, b = 0;
Graphics::YUV2RGB(*((byte *)ySurface->getBasePtr(j, i)), *((byte *)uSurface->getBasePtr(j, i)), *((byte *)vSurface->getBasePtr(j, i)), r, g, b);
if (_pixelFormat.bytesPerPixel == 2)
*((uint16 *)destSurface->getBasePtr(j, i)) = _pixelFormat.RGBToColor(r, g, b);
else
*((uint32 *)destSurface->getBasePtr(j, i)) = _pixelFormat.RGBToColor(r, g, b);
}
}
return destSurface;
}
} // End of namespace Mohawk
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