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122 lines
4.1 KiB
C++
122 lines
4.1 KiB
C++
// Copyright (c) 2009-2011 Ignacio Castano <castano@gmail.com>
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// Copyright (c) 2007-2009 NVIDIA Corporation -- Ignacio Castano <icastano@nvidia.com>
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//
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// Permission is hereby granted, free of charge, to any person
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// obtaining a copy of this software and associated documentation
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// files (the "Software"), to deal in the Software without
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// restriction, including without limitation the rights to use,
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// copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following
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// conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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#include "CompressorDX10.h"
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#include "QuickCompressDXT.h"
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#include "OptimalCompressDXT.h"
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#include "nvtt.h"
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#include "nvimage/ColorBlock.h"
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#include "nvimage/BlockDXT.h"
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#include "nvmath/ftoi.h"
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#include <new> // placement new
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using namespace nv;
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using namespace nvtt;
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void FastCompressorBC4::compressBlock(ColorBlock & src, nvtt::AlphaMode alphaMode, const nvtt::CompressionOptions::Private & compressionOptions, void * output)
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{
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BlockATI1 * block = new(output) BlockATI1;
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AlphaBlock4x4 tmp;
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tmp.init(src, 0); // Copy red to alpha
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QuickCompress::compressDXT5A(tmp, &block->alpha);
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}
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void FastCompressorBC5::compressBlock(ColorBlock & src, nvtt::AlphaMode alphaMode, const nvtt::CompressionOptions::Private & compressionOptions, void * output)
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{
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BlockATI2 * block = new(output) BlockATI2;
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AlphaBlock4x4 tmp;
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tmp.init(src, 0); // Copy red to alpha
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QuickCompress::compressDXT5A(tmp, &block->x);
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tmp.init(src, 1); // Copy green to alpha
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QuickCompress::compressDXT5A(tmp, &block->y);
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}
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void ProductionCompressorBC4::compressBlock(ColorBlock & src, nvtt::AlphaMode alphaMode, const nvtt::CompressionOptions::Private & compressionOptions, void * output)
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{
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BlockATI1 * block = new(output) BlockATI1;
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AlphaBlock4x4 tmp;
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tmp.init(src, 0); // Copy red to alpha
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OptimalCompress::compressDXT5A(tmp, &block->alpha);
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}
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void ProductionCompressorBC5::compressBlock(ColorBlock & src, nvtt::AlphaMode alphaMode, const nvtt::CompressionOptions::Private & compressionOptions, void * output)
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{
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BlockATI2 * block = new(output) BlockATI2;
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AlphaBlock4x4 tmp;
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tmp.init(src, 0); // Copy red to alpha
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OptimalCompress::compressDXT5A(tmp, &block->x);
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tmp.init(src, 1); // Copy green to alpha
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OptimalCompress::compressDXT5A(tmp, &block->y);
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}
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#if 0
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void ProductionCompressorBC5_Luma::compressBlock(ColorSet & set, nvtt::AlphaMode alphaMode, const nvtt::CompressionOptions::Private & compressionOptions, void * output)
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{
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BlockATI2 * block = new(output) BlockATI2;
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AlphaBlock4x4 tmp;
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tmp.init(set, /*channel=*/0);
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OptimalCompress::compressDXT5A(tmp, &block->x);
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// Decode block->x
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AlphaBlock4x4 decoded;
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block->x.decodeBlock(&decoded);
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const float R = 1.0f / 256.0f; // Maximum residual that we can represent. @@ Tweak this.
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// Compute residual block.
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for (int i = 0; i < 16; i++) {
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float in = set.color(i).x; // [0,1]
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float out = float(decoded.alpha[i]) / 255.0f; // [0,1]
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float residual = (out - in); // [-1,1], but usually [-R,R]
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// Normalize residual to [-1,1] range.
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residual /= R;
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// Pack in [0,1] range.
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residual = residual * 0.5f + 0.5f;
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tmp.alpha[i] = nv::ftoi_round(nv::saturate(residual) * 255.0f);
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}
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OptimalCompress::compressDXT5A(tmp, &block->y);
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}
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#endif // 0
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