mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-26 19:55:44 +00:00
99 lines
3.2 KiB
C++
99 lines
3.2 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 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.
|
|
*/
|
|
|
|
/* Based on code from eos https://github.com/DrMcCoy/xoreos/
|
|
* relicensed under GPLv2+ with permission from DrMcCoy and clone2727
|
|
*/
|
|
|
|
/*
|
|
* TGA decoder used in engines:
|
|
* - none
|
|
*/
|
|
|
|
#ifndef GRAPHICS_DECODERS_TGA_H
|
|
#define GRAPHICS_DECODERS_TGA_H
|
|
|
|
#include "graphics/surface.h"
|
|
#include "graphics/decoders/image_decoder.h"
|
|
|
|
namespace Common {
|
|
class SeekableReadStream;
|
|
}
|
|
|
|
namespace Graphics {
|
|
|
|
/** TarGa image-decoder
|
|
* The following variations of TGA are supported:
|
|
* - Type 1 - Color-mapped images in 16/24/32 bpp with 8 bit indexes
|
|
* - Type 2 - 16/24/32 bpp Top AND Bottom origined.
|
|
* - Type 3 - Black/White images, 8bpp.
|
|
* - Type 9 - RLE-encoded color-mapped images. (8 bit indexes only)
|
|
* - Type 10 - RLE-encoded TrueColor, 24/32bpp.
|
|
* - Type 11 - RLE-encoded Black/White, 8bpp.
|
|
*
|
|
* No images are returned with a palette, instead they are converted
|
|
* to 16 bpp for Type 1, or 32 bpp for Black/White-images.
|
|
*/
|
|
class TGADecoder : public ImageDecoder {
|
|
public:
|
|
TGADecoder();
|
|
virtual ~TGADecoder();
|
|
virtual void destroy();
|
|
virtual const Surface *getSurface() const { return &_surface; }
|
|
virtual const byte *getPalette() const { return _colorMap; }
|
|
virtual uint16 getPaletteColorCount() const { return _colorMapLength; }
|
|
virtual bool loadStream(Common::SeekableReadStream &stream);
|
|
private:
|
|
// Format-spec from:
|
|
//http://www.ludorg.net/amnesia/TGA_File_Format_Spec.html
|
|
enum {
|
|
TYPE_CMAP = 1,
|
|
TYPE_TRUECOLOR = 2,
|
|
TYPE_BW = 3,
|
|
TYPE_RLE_CMAP = 9,
|
|
TYPE_RLE_TRUECOLOR = 10,
|
|
TYPE_RLE_BW = 11
|
|
};
|
|
|
|
// Color-map:
|
|
bool _colorMapSize;
|
|
byte *_colorMap;
|
|
int16 _colorMapOrigin;
|
|
int16 _colorMapLength;
|
|
byte _colorMapEntryLength;
|
|
|
|
// Origin may be at the top, or bottom
|
|
bool _originTop;
|
|
|
|
PixelFormat _format;
|
|
Surface _surface;
|
|
// Loading helpers
|
|
bool readHeader(Common::SeekableReadStream &tga, byte &imageType, byte &pixelDepth);
|
|
bool readData(Common::SeekableReadStream &tga, byte imageType, byte pixelDepth);
|
|
bool readDataColorMapped(Common::SeekableReadStream &tga, byte imageType, byte indexDepth);
|
|
bool readDataRLE(Common::SeekableReadStream &tga, byte imageType, byte pixelDepth);
|
|
bool readColorMap(Common::SeekableReadStream &tga, byte imageType, byte pixelDepth);
|
|
};
|
|
|
|
} // End of namespace Graphics
|
|
|
|
#endif // GRAPHICS_DECODERS_TGA_H
|