mirror of
https://github.com/scummvm/scummvm.git
synced 2025-04-02 10:52:32 -04:00
78 lines
1.9 KiB
C++
78 lines
1.9 KiB
C++
/* 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/>.
|
|
*
|
|
*/
|
|
|
|
#ifndef STARK_XMG_H
|
|
#define STARK_XMG_H
|
|
|
|
#include "common/stream.h"
|
|
|
|
namespace Graphics {
|
|
struct Surface;
|
|
}
|
|
|
|
namespace Stark {
|
|
namespace Formats {
|
|
|
|
/**
|
|
* XMG (still image) decoder
|
|
*/
|
|
class XMGDecoder {
|
|
public:
|
|
static Graphics::Surface *decode(Common::ReadStream *stream);
|
|
static void readSize(Common::ReadStream *stream, uint &width, uint &height);
|
|
|
|
private:
|
|
explicit XMGDecoder(Common::ReadStream *stream);
|
|
|
|
struct Block {
|
|
uint32 a1, a2;
|
|
uint32 b1, b2;
|
|
};
|
|
|
|
void readHeader();
|
|
Graphics::Surface *decodeImage();
|
|
Block decodeBlock(byte op);
|
|
void drawBlock(const Block &block, Graphics::Surface *surface);
|
|
|
|
Block processYCrCb();
|
|
Block processTrans();
|
|
Block processRGB();
|
|
|
|
uint32 _width;
|
|
uint32 _height;
|
|
|
|
uint32 _currX;
|
|
uint32 _currY;
|
|
|
|
Common::ReadStream *_stream;
|
|
|
|
/**
|
|
* The transparency color in the RGB and transparency blocks.
|
|
* In the output surface, the transparent color is black with zero
|
|
* alpha. So the images are effectively pre-multiplied alpha.
|
|
*/
|
|
uint32 _transColor;
|
|
};
|
|
|
|
} // End of namespace Formats
|
|
} // End of namespace Stark
|
|
|
|
#endif // STARK_XMG_H
|