146 lines
4.5 KiB
C++
146 lines
4.5 KiB
C++
/****************************************************************************
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Copyright (c) 2006 Simon Brown si@sjbrown.co.uk
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Copyright (c) 2011-2013,WebJet Business Division,CYOU
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http://www.genesis-3d.com.cn
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#ifndef __DXTextureDecompress_H__
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#define __DXTextureDecompress_H__
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#include "foundation/core/types.h"
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namespace Resources
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{
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class DXTextureDecompress
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{
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public:
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DXTextureDecompress(void);
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virtual ~DXTextureDecompress(void);
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static void DecompressImage (uint32* destData,const int imageW, const int imageH, const uint32* srcData, int flags);
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};
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}
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//! All squish API functions live in this namespace.
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namespace squish {
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// -----------------------------------------------------------------------------
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//! Typedef a quantity that is a single unsigned byte.
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typedef unsigned char u8;
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// -----------------------------------------------------------------------------
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enum
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{
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//! Use DXT1 compression.
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kDxt1 = ( 1 << 0 ),
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//! Use DXT3 compression.
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kDxt3 = ( 1 << 1 ),
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//! Use DXT5 compression.
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kDxt5 = ( 1 << 2 ),
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//! Use a very slow but very high quality colour compressor.
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kColourIterativeClusterFit = ( 1 << 8 ),
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//! Use a slow but high quality colour compressor (the default).
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kColourClusterFit = ( 1 << 3 ),
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//! Use a fast but low quality colour compressor.
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kColourRangeFit = ( 1 << 4 ),
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//! Use a perceptual metric for colour error (the default).
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kColourMetricPerceptual = ( 1 << 5 ),
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//! Use a uniform metric for colour error.
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kColourMetricUniform = ( 1 << 6 ),
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//! Weight the colour by alpha during cluster fit (disabled by default).
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kWeightColourByAlpha = ( 1 << 7 )
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};
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// -----------------------------------------------------------------------------
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/*! @brief Decompresses a 4x4 block of pixels.
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@param rgba Storage for the 16 decompressed pixels.
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@param block The compressed DXT block.
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@param flags Compression flags.
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The decompressed pixels will be written as a contiguous array of 16 rgba
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values, with each component as 1 byte each. In memory this is:
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{ r1, g1, b1, a1, .... , r16, g16, b16, a16 }
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The flags parameter should specify either kDxt1, kDxt3 or kDxt5 compression,
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however, DXT1 will be used by default if none is specified. All other flags
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are ignored.
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*/
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void Decompress( u8* rgba, void const* block, int flags );
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// -----------------------------------------------------------------------------
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/*! @brief Decompresses an image in memory.
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@param rgba Storage for the decompressed pixels.
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@param width The width of the source image.
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@param height The height of the source image.
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@param blocks The compressed DXT blocks.
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@param flags Compression flags.
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The decompressed pixels will be written as a contiguous array of width*height
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16 rgba values, with each component as 1 byte each. In memory this is:
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{ r1, g1, b1, a1, .... , rn, gn, bn, an } for n = width*height
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The flags parameter should specify either kDxt1, kDxt3 or kDxt5 compression,
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however, DXT1 will be used by default if none is specified. All other flags
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are ignored.
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Internally this function calls squish::Decompress for each block.
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*/
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void DecompressImage( u8* rgba, int width, int height, void const* blocks, int flags );
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// -----------------------------------------------------------------------------
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void DecompressColour( u8* rgba, void const* block, bool isDxt1 );
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void DecompressAlphaDxt3( u8* rgba, void const* block );
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void DecompressAlphaDxt5( u8* rgba, void const* block );
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} // namespace squish
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#endif
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