// Copyright (c) 2009-2011 Ignacio Castano <castano@gmail.com>
// Copyright (c) 2007-2009 NVIDIA Corporation -- Ignacio Castano <icastano@nvidia.com>
// 
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.

#include "CompressorDX10.h"
#include "QuickCompressDXT.h"
#include "OptimalCompressDXT.h"

#include "nvtt.h"

#include "nvimage/ColorBlock.h"
#include "nvimage/BlockDXT.h"

#include <new> // placement new

using namespace nv;
using namespace nvtt;


void FastCompressorBC4::compressBlock(ColorBlock & rgba, nvtt::AlphaMode alphaMode, const nvtt::CompressionOptions::Private & compressionOptions, void * output)
{
	BlockATI1 * block = new(output) BlockATI1;
	
	rgba.swizzle(0, 1, 2, 0); // Copy red to alpha
	QuickCompress::compressDXT5A(rgba, &block->alpha);
}

void FastCompressorBC5::compressBlock(ColorBlock & rgba, nvtt::AlphaMode alphaMode, const nvtt::CompressionOptions::Private & compressionOptions, void * output)
{
	BlockATI2 * block = new(output) BlockATI2;
	
	rgba.swizzle(0, 1, 2, 0); // Copy red to alpha
	QuickCompress::compressDXT5A(rgba, &block->x);
	
	rgba.swizzle(0, 1, 2, 1); // Copy green to alpha
	QuickCompress::compressDXT5A(rgba, &block->y);
}


void ProductionCompressorBC4::compressBlock(ColorBlock & rgba, nvtt::AlphaMode alphaMode, const nvtt::CompressionOptions::Private & compressionOptions, void * output)
{
	BlockATI1 * block = new(output) BlockATI1;

	rgba.swizzle(0, 1, 2, 0); // Copy red to alpha
	OptimalCompress::compressDXT5A(rgba, &block->alpha);
}

void ProductionCompressorBC5::compressBlock(ColorBlock & rgba, nvtt::AlphaMode alphaMode, const nvtt::CompressionOptions::Private & compressionOptions, void * output)
{
	BlockATI2 * block = new(output) BlockATI2;
	
	rgba.swizzle(0, 1, 2, 0); // Copy red to alpha
	OptimalCompress::compressDXT5A(rgba, &block->x);
	
	rgba.swizzle(0, 1, 2, 1); // Copy green to alpha
	OptimalCompress::compressDXT5A(rgba, &block->y);
}