// 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.

#ifndef NV_TT_OPTIMALCOMPRESSDXT_H
#define NV_TT_OPTIMALCOMPRESSDXT_H

//#include "nvimage/nvimage.h"

#include "nvmath/Color.h"

namespace nv
{
    struct ColorSet;
	struct ColorBlock;
	struct BlockDXT1;
	struct BlockDXT3;
	struct BlockDXT5;
	struct AlphaBlockDXT3;
	struct AlphaBlockDXT5;
    struct AlphaBlock4x4;

	namespace OptimalCompress
	{
        // Single color compressors:
		void compressDXT1(Color32 rgba, BlockDXT1 * dxtBlock);
		void compressDXT1a(Color32 rgba, uint alphaMask, BlockDXT1 * dxtBlock);
		void compressDXT1G(uint8 g, BlockDXT1 * dxtBlock);
		
        void compressDXT3A(const AlphaBlock4x4 & src, AlphaBlockDXT3 * dst);
        void compressDXT5A(const AlphaBlock4x4 & src, AlphaBlockDXT5 * dst);

		void compressDXT1G(const ColorBlock & src, BlockDXT1 * dst);
		void compressDXT3A(const ColorBlock & src, AlphaBlockDXT3 * dst);
		void compressDXT5A(const ColorBlock & src, AlphaBlockDXT5 * dst);
        
        void compressDXT1_Luma(const ColorBlock & src, BlockDXT1 * dst);

        void compressDXT5A_RGBM(const ColorSet & src, const ColorBlock & RGB, AlphaBlockDXT5 * dst);
	}
} // nv namespace

#endif // NV_TT_OPTIMALCOMPRESSDXT_H