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https://github.com/libretro/scummvm.git
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86 lines
2.5 KiB
C++
86 lines
2.5 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "glk/raw_decoder.h"
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#include "common/stream.h"
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#include "common/textconsole.h"
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namespace Glk {
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RawDecoder::RawDecoder() : Image::ImageDecoder(), _palette(nullptr), _paletteColorCount(0),
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_transColor(0) {
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}
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RawDecoder::~RawDecoder() {
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destroy();
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}
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void RawDecoder::destroy() {
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_surface.free();
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delete[] _palette;
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_palette = nullptr;
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}
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bool RawDecoder::loadStream(Common::SeekableReadStream &stream) {
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// Reset member variables from previous decodings
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destroy();
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uint width = stream.readUint16LE();
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uint height = stream.readUint16LE();
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_paletteColorCount = stream.readUint16LE();
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assert(_paletteColorCount == 0 || _paletteColorCount <= 0x100);
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if (_paletteColorCount != 0) {
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// Read in the palette
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_palette = new byte[_paletteColorCount * 3];
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stream.read(_palette, _paletteColorCount * 3);
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// Get the transparent color
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byte transColor = stream.readByte();
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if (transColor < _paletteColorCount)
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_transColor = transColor;
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} else {
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_transColor = 0;
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}
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// Set up the surface
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_surface.create(width, height, (_paletteColorCount == 0) ?
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Graphics::PixelFormat(4, 8, 8, 8, 8, 24, 16, 8, 0) :
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Graphics::PixelFormat::createFormatCLUT8());
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assert((stream.size() - stream.pos()) ==
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(int)(width * height * _surface.format.bytesPerPixel));
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byte *pixels = (byte *)_surface.getPixels();
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stream.read(pixels, width * height * _surface.format.bytesPerPixel);
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if (_palette) {
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for (uint idx = 0; idx < width * height; ++idx, ++pixels) {
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assert(*pixels != 0xff);
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if (*pixels >= _paletteColorCount)
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*pixels = _paletteColorCount - 1;
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}
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}
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return true;
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}
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} // End of namespace Glk
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