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      1 #ifndef _TCUTEXLOOKUPVERIFIER_HPP
      2 #define _TCUTEXLOOKUPVERIFIER_HPP
      3 /*-------------------------------------------------------------------------
      4  * drawElements Quality Program Tester Core
      5  * ----------------------------------------
      6  *
      7  * Copyright 2014 The Android Open Source Project
      8  *
      9  * Licensed under the Apache License, Version 2.0 (the "License");
     10  * you may not use this file except in compliance with the License.
     11  * You may obtain a copy of the License at
     12  *
     13  *      http://www.apache.org/licenses/LICENSE-2.0
     14  *
     15  * Unless required by applicable law or agreed to in writing, software
     16  * distributed under the License is distributed on an "AS IS" BASIS,
     17  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     18  * See the License for the specific language governing permissions and
     19  * limitations under the License.
     20  *
     21  *//*!
     22  * \file
     23  * \brief Texture lookup simulator that is capable of verifying generic
     24  *		  lookup results based on accuracy parameters.
     25  *//*--------------------------------------------------------------------*/
     26 
     27 #include "tcuDefs.hpp"
     28 #include "tcuTexture.hpp"
     29 
     30 namespace tcu
     31 {
     32 
     33 /*--------------------------------------------------------------------*//*!
     34  * \brief Generic lookup precision parameters.
     35  *
     36  * For (assumed) floating-point values recision is defined by number of
     37  * accurate bits in significand. Maximum number of accurate bits supported
     38  * is 23 (limit of single-precision FP).
     39  *
     40  * For fixed-point values precision is defined by number of bits in
     41  * the fractional part.
     42  *//*--------------------------------------------------------------------*/
     43 struct LookupPrecision
     44 {
     45 	IVec3		coordBits;		//!< Bits per coordinate component before any transformations. Assumed to be floating-point.
     46 	IVec3		uvwBits;		//!< Bits per component in final per-level UV(W) coordinates. Assumed to be fixed-point.
     47 	Vec4		colorThreshold;	//!< Threshold for match.
     48 	BVec4		colorMask;		//!< Channel mask for comparison.
     49 
     50 	LookupPrecision (void)
     51 		: coordBits			(22)
     52 		, uvwBits			(16)
     53 		, colorThreshold	(0.0f)
     54 		, colorMask			(true)
     55 	{
     56 	}
     57 };
     58 
     59 struct IntLookupPrecision
     60 {
     61 	IVec3		coordBits;		//!< Bits per coordinate component before any transformations. Assumed to be floating-point.
     62 	IVec3		uvwBits;		//!< Bits per component in final per-level UV(W) coordinates. Assumed to be fixed-point.
     63 	UVec4		colorThreshold;	//!< Threshold for match.
     64 	BVec4		colorMask;		//!< Channel mask for comparison.
     65 
     66 	IntLookupPrecision (void)
     67 		: coordBits			(22)
     68 		, uvwBits			(16)
     69 		, colorThreshold	(0)
     70 		, colorMask			(true)
     71 	{
     72 	}
     73 };
     74 
     75 /*--------------------------------------------------------------------*//*!
     76  * \brief Lod computation precision parameters.
     77  *//*--------------------------------------------------------------------*/
     78 struct LodPrecision
     79 {
     80 	int			derivateBits;	//!< Number of bits in derivates. (Floating-point)
     81 	int			lodBits;		//!< Number of bits in final lod (accuracy of log2()). (Fixed-point)
     82 
     83 	LodPrecision (void)
     84 		: derivateBits	(22)
     85 		, lodBits		(16)
     86 	{
     87 	}
     88 };
     89 
     90 enum TexLookupScaleMode
     91 {
     92 	TEX_LOOKUP_SCALE_MINIFY	= 0,
     93 	TEX_LOOKUP_SCALE_MAGNIFY,
     94 
     95 	TEX_LOOKUP_SCALE_MODE_LAST
     96 };
     97 
     98 Vec4		computeFixedPointThreshold			(const IVec4& bits);
     99 Vec4		computeFloatingPointThreshold		(const IVec4& bits, const Vec4& value);
    100 
    101 Vec2		computeLodBoundsFromDerivates		(const float dudx, const float dudy, const LodPrecision& prec);
    102 Vec2		computeLodBoundsFromDerivates		(const float dudx, const float dvdx, const float dudy, const float dvdy, const LodPrecision& prec);
    103 Vec2		computeLodBoundsFromDerivates		(const float dudx, const float dvdx, const float dwdx, const float dudy, const float dvdy, const float dwdy, const LodPrecision& prec);
    104 Vec2		computeCubeLodBoundsFromDerivates	(const Vec3& coord, const Vec3& coordDx, const Vec3& coordDy, const int faceSize, const LodPrecision& prec);
    105 
    106 Vec2		clampLodBounds						(const Vec2& lodBounds, const Vec2& lodMinMax, const LodPrecision& prec);
    107 
    108 bool		isLookupResultValid					(const Texture1DView&			texture, const Sampler& sampler, const LookupPrecision& prec, const float coord, const Vec2& lodBounds, const Vec4& result);
    109 bool		isLookupResultValid					(const Texture2DView&			texture, const Sampler& sampler, const LookupPrecision& prec, const Vec2& coord, const Vec2& lodBounds, const Vec4& result);
    110 bool		isLookupResultValid					(const TextureCubeView&			texture, const Sampler& sampler, const LookupPrecision& prec, const Vec3& coord, const Vec2& lodBounds, const Vec4& result);
    111 bool		isLookupResultValid					(const Texture1DArrayView&		texture, const Sampler& sampler, const LookupPrecision& prec, const Vec2& coord, const Vec2& lodBounds, const Vec4& result);
    112 bool		isLookupResultValid					(const Texture2DArrayView&		texture, const Sampler& sampler, const LookupPrecision& prec, const Vec3& coord, const Vec2& lodBounds, const Vec4& result);
    113 bool		isLookupResultValid					(const Texture3DView&			texture, const Sampler& sampler, const LookupPrecision& prec, const Vec3& coord, const Vec2& lodBounds, const Vec4& result);
    114 bool		isLookupResultValid					(const TextureCubeArrayView&	texture, const Sampler& sampler, const LookupPrecision& prec, const IVec4& coordBits, const Vec4& coord, const Vec2& lodBounds, const Vec4& result);
    115 
    116 bool		isLevel1DLookupResultValid			(const ConstPixelBufferAccess& access, const Sampler& sampler, TexLookupScaleMode scaleMode, const LookupPrecision& prec, const float coordX, const int coordY, const Vec4& result);
    117 bool		isLevel1DLookupResultValid			(const ConstPixelBufferAccess& access, const Sampler& sampler, TexLookupScaleMode scaleMode, const IntLookupPrecision& prec, const float coordX, const int coordY, const IVec4& result);
    118 bool		isLevel1DLookupResultValid			(const ConstPixelBufferAccess& access, const Sampler& sampler, TexLookupScaleMode scaleMode, const IntLookupPrecision& prec, const float coordX, const int coordY, const UVec4& result);
    119 
    120 bool		isLevel2DLookupResultValid			(const ConstPixelBufferAccess& access, const Sampler& sampler, TexLookupScaleMode scaleMode, const LookupPrecision& prec, const Vec2& coord, const int coordZ, const Vec4& result);
    121 bool		isLevel2DLookupResultValid			(const ConstPixelBufferAccess& access, const Sampler& sampler, TexLookupScaleMode scaleMode, const IntLookupPrecision& prec, const Vec2& coord, const int coordZ, const IVec4& result);
    122 bool		isLevel2DLookupResultValid			(const ConstPixelBufferAccess& access, const Sampler& sampler, TexLookupScaleMode scaleMode, const IntLookupPrecision& prec, const Vec2& coord, const int coordZ, const UVec4& result);
    123 
    124 bool		isLevel3DLookupResultValid			(const ConstPixelBufferAccess& access, const Sampler& sampler, TexLookupScaleMode scaleMode, const LookupPrecision& prec, const Vec3& coord, const Vec4& result);
    125 bool		isLevel3DLookupResultValid			(const ConstPixelBufferAccess& access, const Sampler& sampler, TexLookupScaleMode scaleMode, const IntLookupPrecision& prec, const Vec3& coord, const IVec4& result);
    126 bool		isLevel3DLookupResultValid			(const ConstPixelBufferAccess& access, const Sampler& sampler, TexLookupScaleMode scaleMode, const IntLookupPrecision& prec, const Vec3& coord, const UVec4& result);
    127 
    128 bool		isLinearSampleResultValid			(const ConstPixelBufferAccess& level, const Sampler& sampler, const LookupPrecision& prec, const Vec2& coord, const int coordZ, const Vec4& result);
    129 
    130 bool		isGatherOffsetsResultValid			(const Texture2DView&		texture, const Sampler& sampler, const LookupPrecision& prec,		const Vec2& coord, int componentNdx, const IVec2 (&offsets)[4], const Vec4& result);
    131 bool		isGatherOffsetsResultValid			(const Texture2DView&		texture, const Sampler& sampler, const IntLookupPrecision& prec,	const Vec2& coord, int componentNdx, const IVec2 (&offsets)[4], const IVec4& result);
    132 bool		isGatherOffsetsResultValid			(const Texture2DView&		texture, const Sampler& sampler, const IntLookupPrecision& prec,	const Vec2& coord, int componentNdx, const IVec2 (&offsets)[4], const UVec4& result);
    133 
    134 bool		isGatherOffsetsResultValid			(const Texture2DArrayView&	texture, const Sampler& sampler, const LookupPrecision& prec,		const Vec3& coord, int componentNdx, const IVec2 (&offsets)[4], const Vec4& result);
    135 bool		isGatherOffsetsResultValid			(const Texture2DArrayView&	texture, const Sampler& sampler, const IntLookupPrecision& prec,	const Vec3& coord, int componentNdx, const IVec2 (&offsets)[4], const IVec4& result);
    136 bool		isGatherOffsetsResultValid			(const Texture2DArrayView&	texture, const Sampler& sampler, const IntLookupPrecision& prec,	const Vec3& coord, int componentNdx, const IVec2 (&offsets)[4], const UVec4& result);
    137 
    138 // \note For cube textures, gather is only defined without offset.
    139 bool		isGatherResultValid					(const TextureCubeView&		texture, const Sampler& sampler, const LookupPrecision& prec,		const Vec3& coord, int componentNdx, const Vec4& result);
    140 bool		isGatherResultValid					(const TextureCubeView&		texture, const Sampler& sampler, const IntLookupPrecision& prec,	const Vec3& coord, int componentNdx, const IVec4& result);
    141 bool		isGatherResultValid					(const TextureCubeView&		texture, const Sampler& sampler, const IntLookupPrecision& prec,	const Vec3& coord, int componentNdx, const UVec4& result);
    142 
    143 } // tcu
    144 
    145 #endif // _TCUTEXLOOKUPVERIFIER_HPP
    146