#ifndef _GLUTEXTURETESTUTIL_HPP
#define _GLUTEXTURETESTUTIL_HPP
/*-------------------------------------------------------------------------
 * drawElements Quality Program OpenGL ES Utilities
 * ------------------------------------------------
 *
 * 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 Utility functions and structures for texture tests.
 *
 * This code is originated from the modules/glshared/glsTextureTestUtil.hpp
 * and it is tightly coupled with the GLES and Vulkan texture tests!
 *
 * About coordinates:
 *  + Quads consist of 2 triangles, rendered using explicit indices.
 *  + All TextureTestUtil functions and classes expect texture coordinates
 *    for quads to be specified in order (-1, -1), (-1, 1), (1, -1), (1, 1).
 *//*--------------------------------------------------------------------*/

#include "tcuDefs.hpp"
#include "tcuSurfaceAccess.hpp"
#include "tcuTestContext.hpp"
#include "tcuTestLog.hpp"
#include "tcuTexture.hpp"
#include "tcuTexCompareVerifier.hpp"
#include "qpWatchDog.h"

namespace glu
{
namespace TextureTestUtil
{
enum TextureType
{
	TEXTURETYPE_2D = 0,
	TEXTURETYPE_CUBE,
	TEXTURETYPE_2D_ARRAY,
	TEXTURETYPE_3D,
	TEXTURETYPE_CUBE_ARRAY,
	TEXTURETYPE_1D,
	TEXTURETYPE_1D_ARRAY,
	TEXTURETYPE_BUFFER,

	TEXTURETYPE_LAST
};

enum SamplerType
{
	SAMPLERTYPE_FLOAT,
	SAMPLERTYPE_INT,
	SAMPLERTYPE_UINT,
	SAMPLERTYPE_SHADOW,

	SAMPLERTYPE_FETCH_FLOAT,
	SAMPLERTYPE_FETCH_INT,
	SAMPLERTYPE_FETCH_UINT,

	SAMPLERTYPE_LAST
};

struct RenderParams
{
	enum Flags
	{
		PROJECTED		= (1<<0),
		USE_BIAS		= (1<<1),
		LOG_PROGRAMS	= (1<<2),
		LOG_UNIFORMS	= (1<<3),

		LOG_ALL			= LOG_PROGRAMS|LOG_UNIFORMS
	};

	RenderParams (TextureType texType_)
		: texType		(texType_)
		, samplerType	(SAMPLERTYPE_FLOAT)
		, flags			(0)
		, w				(1.0f)
		, bias			(0.0f)
		, ref			(0.0f)
		, colorScale	(1.0f)
		, colorBias		(0.0f)
	{
	}

	TextureType		texType;		//!< Texture type.
	SamplerType		samplerType;	//!< Sampler type.
	deUint32		flags;			//!< Feature flags.
	tcu::Vec4		w;				//!< w coordinates for quad vertices.
	float			bias;			//!< User-supplied bias.
	float			ref;			//!< Reference value for shadow lookups.

	// color = lookup() * scale + bias
	tcu::Vec4		colorScale;		//!< Scale for texture color values.
	tcu::Vec4		colorBias;		//!< Bias for texture color values.
};

enum LodMode
{
	LODMODE_EXACT = 0,		//!< Ideal lod computation.
	LODMODE_MIN_BOUND,		//!< Use estimation range minimum bound.
	LODMODE_MAX_BOUND,		//!< Use estimation range maximum bound.

	LODMODE_LAST
};

struct ReferenceParams : public RenderParams
{
	ReferenceParams (TextureType texType_)
		: RenderParams	(texType_)
		, sampler		()
		, lodMode		(LODMODE_EXACT)
		, minLod		(-1000.0f)
		, maxLod		(1000.0f)
		, baseLevel		(0)
		, maxLevel		(1000)
		, unnormal		(false)
	{
	}

	ReferenceParams (TextureType texType_, const tcu::Sampler& sampler_, LodMode lodMode_ = LODMODE_EXACT)
		: RenderParams	(texType_)
		, sampler		(sampler_)
		, lodMode		(lodMode_)
		, minLod		(-1000.0f)
		, maxLod		(1000.0f)
		, baseLevel		(0)
		, maxLevel		(1000)
		, unnormal		(false)
	{
	}

	tcu::Sampler		sampler;
	LodMode				lodMode;
	float				minLod;
	float				maxLod;
	int					baseLevel;
	int					maxLevel;
	bool				unnormal;
};


SamplerType		getSamplerType		(tcu::TextureFormat format);
SamplerType		getFetchSamplerType	(tcu::TextureFormat format);

// Similar to sampleTexture() except uses texelFetch.
void			fetchTexture				(const tcu::SurfaceAccess& dst, const tcu::ConstPixelBufferAccess& src, const float* texCoord, const tcu::Vec4& colorScale, const tcu::Vec4& colorBias);

void			sampleTexture				(const tcu::SurfaceAccess& dst, const tcu::Texture2DView&		src, const float* texCoord, const ReferenceParams& params);
void			sampleTexture				(const tcu::SurfaceAccess& dst, const tcu::TextureCubeView&		src, const float* texCoord, const ReferenceParams& params);
void			sampleTexture				(const tcu::SurfaceAccess& dst, const tcu::Texture2DArrayView&	src, const float* texCoord, const ReferenceParams& params);
void			sampleTexture				(const tcu::SurfaceAccess& dst, const tcu::Texture3DView&		src, const float* texCoord, const ReferenceParams& params);
void			sampleTexture				(const tcu::SurfaceAccess& dst, const tcu::TextureCubeArrayView&	src, const float* texCoord, const ReferenceParams& params);
void			sampleTexture				(const tcu::SurfaceAccess& dst, const tcu::Texture1DView&		src, const float* texCoord, const ReferenceParams& params);
void			sampleTexture				(const tcu::SurfaceAccess& dst, const tcu::Texture1DArrayView&	src, const float* texCoord, const ReferenceParams& params);

float			computeLodFromDerivates		(LodMode mode, float dudx, float dudy);
float			computeLodFromDerivates		(LodMode mode, float dudx, float dvdx, float dudy, float dvdy);
float			computeLodFromDerivates		(LodMode mode, float dudx, float dvdx, float dwdx, float dudy, float dvdy, float dwdy);

void			computeQuadTexCoord1D			(std::vector<float>& dst, float left, float right);
void			computeQuadTexCoord1DArray		(std::vector<float>& dst, int layerNdx, float left, float right);
void			computeQuadTexCoord2D			(std::vector<float>& dst, const tcu::Vec2& bottomLeft, const tcu::Vec2& topRight);
void			computeQuadTexCoord2DArray		(std::vector<float>& dst, int layerNdx, const tcu::Vec2& bottomLeft, const tcu::Vec2& topRight);
void			computeQuadTexCoord3D			(std::vector<float>& dst, const tcu::Vec3& p0, const tcu::Vec3& p1, const tcu::IVec3& dirSwz);
void			computeQuadTexCoordCube			(std::vector<float>& dst, tcu::CubeFace face);
void			computeQuadTexCoordCube			(std::vector<float>& dst, tcu::CubeFace face, const tcu::Vec2& bottomLeft, const tcu::Vec2& topRight);
void			computeQuadTexCoordCubeArray	(std::vector<float>& dst, tcu::CubeFace face, const tcu::Vec2& bottomLeft, const tcu::Vec2& topRight, const tcu::Vec2& layerRange);

bool			compareImages				(tcu::TestLog& log, const char* name, const char* desc, const tcu::Surface& reference, const tcu::Surface& rendered, tcu::RGBA threshold);
bool			compareImages				(tcu::TestLog& log, const tcu::Surface& reference, const tcu::Surface& rendered, tcu::RGBA threshold);
int				measureAccuracy				(tcu::TestLog& log, const tcu::Surface& reference, const tcu::Surface& rendered, int bestScoreDiff, int worstScoreDiff);

int				computeTextureLookupDiff	(const tcu::ConstPixelBufferAccess&	result,
											 const tcu::ConstPixelBufferAccess&	reference,
											 const tcu::PixelBufferAccess&		errorMask,
											 const tcu::Texture1DView&			src,
											 const float*						texCoord,
											 const ReferenceParams&				sampleParams,
											 const tcu::LookupPrecision&		lookupPrec,
											 const tcu::LodPrecision&			lodPrec,
											 qpWatchDog*						watchDog);

int				computeTextureLookupDiff	(const tcu::ConstPixelBufferAccess&	result,
											 const tcu::ConstPixelBufferAccess&	reference,
											 const tcu::PixelBufferAccess&		errorMask,
											 const tcu::Texture2DView&			src,
											 const float*						texCoord,
											 const ReferenceParams&				sampleParams,
											 const tcu::LookupPrecision&		lookupPrec,
											 const tcu::LodPrecision&			lodPrec,
											 qpWatchDog*						watchDog);

int				computeTextureLookupDiff	(const tcu::ConstPixelBufferAccess&	result,
											 const tcu::ConstPixelBufferAccess&	reference,
											 const tcu::PixelBufferAccess&		errorMask,
											 const tcu::TextureCubeView&		src,
											 const float*						texCoord,
											 const ReferenceParams&				sampleParams,
											 const tcu::LookupPrecision&		lookupPrec,
											 const tcu::LodPrecision&			lodPrec,
											 qpWatchDog*						watchDog);

int				computeTextureLookupDiff	(const tcu::ConstPixelBufferAccess&	result,
											 const tcu::ConstPixelBufferAccess&	reference,
											 const tcu::PixelBufferAccess&		errorMask,
											 const tcu::Texture1DArrayView&		src,
											 const float*						texCoord,
											 const ReferenceParams&				sampleParams,
											 const tcu::LookupPrecision&		lookupPrec,
											 const tcu::LodPrecision&			lodPrec,
											 qpWatchDog*						watchDog);

int				computeTextureLookupDiff	(const tcu::ConstPixelBufferAccess&	result,
											 const tcu::ConstPixelBufferAccess&	reference,
											 const tcu::PixelBufferAccess&		errorMask,
											 const tcu::Texture2DArrayView&		src,
											 const float*						texCoord,
											 const ReferenceParams&				sampleParams,
											 const tcu::LookupPrecision&		lookupPrec,
											 const tcu::LodPrecision&			lodPrec,
											 qpWatchDog*						watchDog);

int				computeTextureLookupDiff	(const tcu::ConstPixelBufferAccess&	result,
											 const tcu::ConstPixelBufferAccess&	reference,
											 const tcu::PixelBufferAccess&		errorMask,
											 const tcu::Texture3DView&			src,
											 const float*						texCoord,
											 const ReferenceParams&				sampleParams,
											 const tcu::LookupPrecision&		lookupPrec,
											 const tcu::LodPrecision&			lodPrec,
											 qpWatchDog*						watchDog);

int				computeTextureLookupDiff	(const tcu::ConstPixelBufferAccess&	result,
											 const tcu::ConstPixelBufferAccess&	reference,
											 const tcu::PixelBufferAccess&		errorMask,
											 const tcu::TextureCubeArrayView&	src,
											 const float*						texCoord,
											 const ReferenceParams&				sampleParams,
											 const tcu::LookupPrecision&		lookupPrec,
											 const tcu::IVec4&					coordBits,
											 const tcu::LodPrecision&			lodPrec,
											 qpWatchDog*						watchDog);

bool			verifyTextureResult			(tcu::TestContext&					testCtx,
											 const tcu::ConstPixelBufferAccess&	result,
											 const tcu::Texture1DView&			src,
											 const float*						texCoord,
											 const ReferenceParams&				sampleParams,
											 const tcu::LookupPrecision&		lookupPrec,
											 const tcu::LodPrecision&			lodPrec,
											 const tcu::PixelFormat&			pixelFormat);

bool			verifyTextureResult			(tcu::TestContext&					testCtx,
											 const tcu::ConstPixelBufferAccess&	result,
											 const tcu::Texture2DView&			src,
											 const float*						texCoord,
											 const ReferenceParams&				sampleParams,
											 const tcu::LookupPrecision&		lookupPrec,
											 const tcu::LodPrecision&			lodPrec,
											 const tcu::PixelFormat&			pixelFormat);

bool			verifyTextureResult			(tcu::TestContext&					testCtx,
											 const tcu::ConstPixelBufferAccess&	result,
											 const tcu::TextureCubeView&		src,
											 const float*						texCoord,
											 const ReferenceParams&				sampleParams,
											 const tcu::LookupPrecision&		lookupPrec,
											 const tcu::LodPrecision&			lodPrec,
											 const tcu::PixelFormat&			pixelFormat);

bool			verifyTextureResult			(tcu::TestContext&					testCtx,
											 const tcu::ConstPixelBufferAccess&	result,
											 const tcu::Texture1DArrayView&		src,
											 const float*						texCoord,
											 const ReferenceParams&				sampleParams,
											 const tcu::LookupPrecision&		lookupPrec,
											 const tcu::LodPrecision&			lodPrec,
											 const tcu::PixelFormat&			pixelFormat);

bool			verifyTextureResult			(tcu::TestContext&					testCtx,
											 const tcu::ConstPixelBufferAccess&	result,
											 const tcu::Texture2DArrayView&		src,
											 const float*						texCoord,
											 const ReferenceParams&				sampleParams,
											 const tcu::LookupPrecision&		lookupPrec,
											 const tcu::LodPrecision&			lodPrec,
											 const tcu::PixelFormat&			pixelFormat);

bool			verifyTextureResult			(tcu::TestContext&					testCtx,
											 const tcu::ConstPixelBufferAccess&	result,
											 const tcu::Texture3DView&			src,
											 const float*						texCoord,
											 const ReferenceParams&				sampleParams,
											 const tcu::LookupPrecision&		lookupPrec,
											 const tcu::LodPrecision&			lodPrec,
											 const tcu::PixelFormat&			pixelFormat);

bool			verifyTextureResult			(tcu::TestContext&					testCtx,
											 const tcu::ConstPixelBufferAccess&	result,
											 const tcu::TextureCubeArrayView&	src,
											 const float*						texCoord,
											 const ReferenceParams&				sampleParams,
											 const tcu::LookupPrecision&		lookupPrec,
											 const tcu::IVec4&					coordBits,
											 const tcu::LodPrecision&			lodPrec,
											 const tcu::PixelFormat&			pixelFormat);

int				computeTextureCompareDiff	(const tcu::ConstPixelBufferAccess&	result,
											 const tcu::ConstPixelBufferAccess&	reference,
											 const tcu::PixelBufferAccess&		errorMask,
											 const tcu::Texture2DView&			src,
											 const float*						texCoord,
											 const ReferenceParams&				sampleParams,
											 const tcu::TexComparePrecision&	comparePrec,
											 const tcu::LodPrecision&			lodPrec,
											 const tcu::Vec3&					nonShadowThreshold);

int				computeTextureCompareDiff	(const tcu::ConstPixelBufferAccess&	result,
											 const tcu::ConstPixelBufferAccess&	reference,
											 const tcu::PixelBufferAccess&		errorMask,
											 const tcu::TextureCubeView&		src,
											 const float*						texCoord,
											 const ReferenceParams&				sampleParams,
											 const tcu::TexComparePrecision&	comparePrec,
											 const tcu::LodPrecision&			lodPrec,
											 const tcu::Vec3&					nonShadowThreshold);

int				computeTextureCompareDiff	(const tcu::ConstPixelBufferAccess&	result,
											 const tcu::ConstPixelBufferAccess&	reference,
											 const tcu::PixelBufferAccess&		errorMask,
											 const tcu::Texture2DArrayView&		src,
											 const float*						texCoord,
											 const ReferenceParams&				sampleParams,
											 const tcu::TexComparePrecision&	comparePrec,
											 const tcu::LodPrecision&			lodPrec,
											 const tcu::Vec3&					nonShadowThreshold);


inline tcu::IVec4 getBitsVec (const tcu::PixelFormat& format)
{
	return tcu::IVec4(format.redBits, format.greenBits, format.blueBits, format.alphaBits);
}

inline tcu::BVec4 getCompareMask (const tcu::PixelFormat& format)
{
	return tcu::BVec4(format.redBits	> 0,
					  format.greenBits	> 0,
					  format.blueBits	> 0,
					  format.alphaBits	> 0);
}


// Mipmap generation comparison.

struct GenMipmapPrecision
{
	tcu::IVec3			filterBits;			//!< Bits in filtering parameters (fixed-point).
	tcu::Vec4			colorThreshold;		//!< Threshold for color value comparison.
	tcu::BVec4			colorMask;			//!< Color channel comparison mask.
};

qpTestResult	compareGenMipmapResult		(tcu::TestLog& log, const tcu::Texture2D& resultTexture, const tcu::Texture2D& level0Reference, const GenMipmapPrecision& precision);
qpTestResult	compareGenMipmapResult		(tcu::TestLog& log, const tcu::TextureCube& resultTexture, const tcu::TextureCube& level0Reference, const GenMipmapPrecision& precision);

// Utility for logging texture gradient ranges.
struct LogGradientFmt
{
	LogGradientFmt (const tcu::Vec4* min_, const tcu::Vec4* max_) : valueMin(min_), valueMax(max_) {}
	const tcu::Vec4* valueMin;
	const tcu::Vec4* valueMax;
};

std::ostream&			operator<<		(std::ostream& str, const LogGradientFmt& fmt);
inline LogGradientFmt	formatGradient	(const tcu::Vec4* minVal, const tcu::Vec4* maxVal) { return LogGradientFmt(minVal, maxVal); }

} // TextureTestUtil
} // glu

#endif // _GLUTEXTURETESTUTIL_HPP