#ifndef _TCUTEXVERIFIERUTIL_HPP
#define _TCUTEXVERIFIERUTIL_HPP
/*-------------------------------------------------------------------------
 * drawElements Quality Program Tester Core
 * ----------------------------------------
 *
 * Copyright 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 *//*!
 * \file
 * \brief Internal utilities shared between TexLookup and TexCompare verifiers.
 *//*--------------------------------------------------------------------*/

#include "tcuDefs.hpp"
#include "tcuTexture.hpp"

namespace tcu
{
namespace TexVerifierUtil
{

// Error bound utilities

float		computeFloatingPointError			(const float value, const int numAccurateBits);
float		computeFixedPointError				(const int numAccurateBits);
float		computeColorBitsError				(const int bits, const int numAccurateBits);

template<int Size>
inline Vector<float, Size> computeFloatingPointError (const Vector<float, Size>& value, const Vector<deInt32, Size>& numAccurateBits)
{
	Vector<float, Size> res;
	for (int ndx = 0; ndx < Size; ndx++)
		res[ndx] = computeFloatingPointError(value[ndx], numAccurateBits[ndx]);
	return res;
}

template<int Size>
inline Vector<float, Size> computeFixedPointError (const Vector<deInt32, Size>& numAccurateBits)
{
	Vector<float, Size> res;
	for (int ndx = 0; ndx < Size; ndx++)
		res[ndx] = computeFixedPointError(numAccurateBits[ndx]);
	return res;
}

template<int Size>
inline Vector<float, Size> computeColorBitsError(const Vector<deInt32, Size>& bits, const Vector<deInt32, Size>& numAccurateBits)
{
	Vector<float, Size> res;
	for (int ndx = 0; ndx < Size; ndx++)
		res[ndx] = computeColorBitsError(bits[ndx], numAccurateBits[ndx]);
	return res;
}

// Sampler introspection

inline bool isNearestMipmapFilter(const Sampler::FilterMode mode)
{
	return mode == Sampler::NEAREST_MIPMAP_NEAREST || mode == Sampler::LINEAR_MIPMAP_NEAREST || mode == Sampler::CUBIC_MIPMAP_NEAREST;
}

inline bool isLinearMipmapFilter(const Sampler::FilterMode mode)
{
	return mode == Sampler::NEAREST_MIPMAP_LINEAR || mode == Sampler::LINEAR_MIPMAP_LINEAR || mode == Sampler::CUBIC_MIPMAP_LINEAR;
}

inline bool isMipmapFilter(const Sampler::FilterMode mode)
{
	return isNearestMipmapFilter(mode) || isLinearMipmapFilter(mode);
}

inline bool isNearestFilter(const Sampler::FilterMode mode)
{
	return mode == Sampler::NEAREST || mode == Sampler::NEAREST_MIPMAP_NEAREST || mode == Sampler::NEAREST_MIPMAP_LINEAR;
}

inline bool isLinearFilter(const Sampler::FilterMode mode)
{
	return mode == Sampler::LINEAR || mode == Sampler::LINEAR_MIPMAP_NEAREST || mode == Sampler::LINEAR_MIPMAP_LINEAR;
}

inline bool isCubicFilter(const Sampler::FilterMode mode)
{
	return mode == Sampler::CUBIC || mode == Sampler::CUBIC_MIPMAP_NEAREST || mode == Sampler::CUBIC_MIPMAP_LINEAR;
}

inline Sampler::FilterMode getLevelFilter(const Sampler::FilterMode mode)
{
	if (isNearestFilter(mode))
		return Sampler::NEAREST;
	if (isLinearFilter(mode))
		return Sampler::LINEAR;
	return Sampler::CUBIC;
}

inline bool isWrapModeSupported (const Sampler::WrapMode mode)
{
	return mode != Sampler::MIRRORED_REPEAT_CL && mode != Sampler::REPEAT_CL;
}

// Misc utilities

Vec2		computeNonNormalizedCoordBounds		(const bool normalizedCoords, const int dim, const float coord, const int coordBits, const int uvBits);
void		getPossibleCubeFaces				(const Vec3& coord, const IVec3& bits, CubeFace* faces, int& numFaces);

Sampler		getUnnormalizedCoordSampler			(const Sampler& sampler);
int			wrap								(Sampler::WrapMode mode, int c, int size);

} // TexVerifierUtil
} // tcu

#endif // _TCUTEXVERIFIERUTIL_HPP