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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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#include "glk/raw_decoder.h"
#include "common/stream.h"
#include "common/textconsole.h"
namespace Glk {
RawDecoder::RawDecoder() : Image::ImageDecoder(), _palette(nullptr), _paletteColorCount(0),
_transColor(0) {
}
RawDecoder::~RawDecoder() {
destroy();
}
void RawDecoder::destroy() {
_surface.free();
delete[] _palette;
_palette = nullptr;
}
bool RawDecoder::loadStream(Common::SeekableReadStream &stream) {
// Reset member variables from previous decodings
destroy();
uint width = stream.readUint16LE();
uint height = stream.readUint16LE();
_paletteColorCount = stream.readUint16LE();
assert(_paletteColorCount == 0 || _paletteColorCount <= 0x100);
if (_paletteColorCount != 0) {
// Read in the palette
_palette = new byte[_paletteColorCount * 3];
stream.read(_palette, _paletteColorCount * 3);
// Get the transparent color
byte transColor = stream.readByte();
if (transColor < _paletteColorCount)
_transColor = transColor;
} else {
_transColor = 0;
}
// Set up the surface
_surface.create(width, height, (_paletteColorCount == 0) ?
Graphics::PixelFormat(4, 8, 8, 8, 8, 24, 16, 8, 0) :
Graphics::PixelFormat::createFormatCLUT8());
assert((stream.size() - stream.pos()) ==
(int)(width * height * _surface.format.bytesPerPixel));
byte *pixels = (byte *)_surface.getPixels();
stream.read(pixels, width * height * _surface.format.bytesPerPixel);
if (_palette) {
for (uint idx = 0; idx < width * height; ++idx, ++pixels) {
assert(*pixels != 0xff);
if (*pixels >= _paletteColorCount)
*pixels = _paletteColorCount - 1;
}
}
return true;
}
} // End of namespace Glk
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