/*-------------------------------------------------------------------------
 * drawElements Quality Program OpenGL ES 3.1 Module
 * -------------------------------------------------
 *
 * 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 Copy image tests for GL_EXT_copy_image.
 *//*--------------------------------------------------------------------*/

#include "es31fCopyImageTests.hpp"

#include "tes31TestCase.hpp"

#include "glsTextureTestUtil.hpp"

#include "gluContextInfo.hpp"
#include "gluObjectWrapper.hpp"
#include "gluRenderContext.hpp"
#include "gluStrUtil.hpp"
#include "gluTextureUtil.hpp"
#include "gluPixelTransfer.hpp"

#include "glwEnums.hpp"
#include "glwFunctions.hpp"

#include "tcuCompressedTexture.hpp"
#include "tcuFloat.hpp"
#include "tcuImageCompare.hpp"
#include "tcuTestLog.hpp"
#include "tcuTexture.hpp"
#include "tcuTextureUtil.hpp"
#include "tcuVector.hpp"
#include "tcuVectorUtil.hpp"
#include "tcuSeedBuilder.hpp"
#include "tcuResultCollector.hpp"

#include "deArrayBuffer.hpp"
#include "deFloat16.h"
#include "deRandom.hpp"
#include "deStringUtil.hpp"
#include "deUniquePtr.hpp"
#include "deArrayUtil.hpp"

#include <map>
#include <string>
#include <vector>

using namespace deqp::gls::TextureTestUtil;
using namespace glu::TextureTestUtil;

using tcu::Float;
using tcu::IVec2;
using tcu::IVec3;
using tcu::IVec4;
using tcu::Sampler;
using tcu::ScopedLogSection;
using tcu::SeedBuilder;
using tcu::TestLog;
using tcu::Vec4;

using de::ArrayBuffer;

using std::map;
using std::pair;
using std::string;
using std::vector;

namespace deqp
{
namespace gles31
{
namespace Functional
{
namespace
{

enum ViewClass
{
    VIEWCLASS_128_BITS = 0,
    VIEWCLASS_96_BITS,
    VIEWCLASS_64_BITS,
    VIEWCLASS_48_BITS,
    VIEWCLASS_32_BITS,
    VIEWCLASS_24_BITS,
    VIEWCLASS_16_BITS,
    VIEWCLASS_8_BITS,

    VIEWCLASS_EAC_R11,
    VIEWCLASS_EAC_RG11,
    VIEWCLASS_ETC2_RGB,
    VIEWCLASS_ETC2_RGBA,
    VIEWCLASS_ETC2_EAC_RGBA,
    VIEWCLASS_ASTC_4x4_RGBA,
    VIEWCLASS_ASTC_5x4_RGBA,
    VIEWCLASS_ASTC_5x5_RGBA,
    VIEWCLASS_ASTC_6x5_RGBA,
    VIEWCLASS_ASTC_6x6_RGBA,
    VIEWCLASS_ASTC_8x5_RGBA,
    VIEWCLASS_ASTC_8x6_RGBA,
    VIEWCLASS_ASTC_8x8_RGBA,
    VIEWCLASS_ASTC_10x5_RGBA,
    VIEWCLASS_ASTC_10x6_RGBA,
    VIEWCLASS_ASTC_10x8_RGBA,
    VIEWCLASS_ASTC_10x10_RGBA,
    VIEWCLASS_ASTC_12x10_RGBA,
    VIEWCLASS_ASTC_12x12_RGBA
};

enum Verify
{
    VERIFY_NONE = 0,
    VERIFY_COMPARE_REFERENCE
};

const char *viewClassToName(ViewClass viewClass)
{
    switch (viewClass)
    {
    case VIEWCLASS_128_BITS:
        return "viewclass_128_bits";
    case VIEWCLASS_96_BITS:
        return "viewclass_96_bits";
    case VIEWCLASS_64_BITS:
        return "viewclass_64_bits";
    case VIEWCLASS_48_BITS:
        return "viewclass_48_bits";
    case VIEWCLASS_32_BITS:
        return "viewclass_32_bits";
    case VIEWCLASS_24_BITS:
        return "viewclass_24_bits";
    case VIEWCLASS_16_BITS:
        return "viewclass_16_bits";
    case VIEWCLASS_8_BITS:
        return "viewclass_8_bits";
    case VIEWCLASS_EAC_R11:
        return "viewclass_eac_r11";
    case VIEWCLASS_EAC_RG11:
        return "viewclass_eac_rg11";
    case VIEWCLASS_ETC2_RGB:
        return "viewclass_etc2_rgb";
    case VIEWCLASS_ETC2_RGBA:
        return "viewclass_etc2_rgba";
    case VIEWCLASS_ETC2_EAC_RGBA:
        return "viewclass_etc2_eac_rgba";
    case VIEWCLASS_ASTC_4x4_RGBA:
        return "viewclass_astc_4x4_rgba";
    case VIEWCLASS_ASTC_5x4_RGBA:
        return "viewclass_astc_5x4_rgba";
    case VIEWCLASS_ASTC_5x5_RGBA:
        return "viewclass_astc_5x5_rgba";
    case VIEWCLASS_ASTC_6x5_RGBA:
        return "viewclass_astc_6x5_rgba";
    case VIEWCLASS_ASTC_6x6_RGBA:
        return "viewclass_astc_6x6_rgba";
    case VIEWCLASS_ASTC_8x5_RGBA:
        return "viewclass_astc_8x5_rgba";
    case VIEWCLASS_ASTC_8x6_RGBA:
        return "viewclass_astc_8x6_rgba";
    case VIEWCLASS_ASTC_8x8_RGBA:
        return "viewclass_astc_8x8_rgba";
    case VIEWCLASS_ASTC_10x5_RGBA:
        return "viewclass_astc_10x5_rgba";
    case VIEWCLASS_ASTC_10x6_RGBA:
        return "viewclass_astc_10x6_rgba";
    case VIEWCLASS_ASTC_10x8_RGBA:
        return "viewclass_astc_10x8_rgba";
    case VIEWCLASS_ASTC_10x10_RGBA:
        return "viewclass_astc_10x10_rgba";
    case VIEWCLASS_ASTC_12x10_RGBA:
        return "viewclass_astc_12x10_rgba";
    case VIEWCLASS_ASTC_12x12_RGBA:
        return "viewclass_astc_12x12_rgba";

    default:
        DE_ASSERT(false);
        return NULL;
    }
}

const char *targetToName(uint32_t target)
{
    switch (target)
    {
    case GL_RENDERBUFFER:
        return "renderbuffer";
    case GL_TEXTURE_2D:
        return "texture2d";
    case GL_TEXTURE_3D:
        return "texture3d";
    case GL_TEXTURE_2D_ARRAY:
        return "texture2d_array";
    case GL_TEXTURE_CUBE_MAP:
        return "cubemap";

    default:
        DE_ASSERT(false);
        return NULL;
    }
}

string formatToName(uint32_t format)
{
    string enumName;

    if (glu::isCompressedFormat(format))
        enumName = glu::getCompressedTextureFormatStr(format).toString().substr(14); // Strip GL_COMPRESSED_
    else
        enumName = glu::getUncompressedTextureFormatStr(format).toString().substr(3); // Strip GL_

    return de::toLower(enumName);
}

bool isFloatFormat(uint32_t format)
{
    if (glu::isCompressedFormat(format))
        return false;
    else
        return tcu::getTextureChannelClass(glu::mapGLInternalFormat(format).type) ==
               tcu::TEXTURECHANNELCLASS_FLOATING_POINT;
}

bool isUintFormat(uint32_t format)
{
    if (glu::isCompressedFormat(format))
        return false;
    else
        return tcu::getTextureChannelClass(glu::mapGLInternalFormat(format).type) ==
               tcu::TEXTURECHANNELCLASS_UNSIGNED_INTEGER;
}

bool isIntFormat(uint32_t format)
{
    if (glu::isCompressedFormat(format))
        return false;
    else
        return tcu::getTextureChannelClass(glu::mapGLInternalFormat(format).type) ==
               tcu::TEXTURECHANNELCLASS_SIGNED_INTEGER;
}

bool isFixedPointFormat(uint32_t format)
{
    if (glu::isCompressedFormat(format))
        return false;
    else
    {
        const tcu::TextureChannelClass channelClass =
            tcu::getTextureChannelClass(glu::mapGLInternalFormat(format).type);

        return channelClass == tcu::TEXTURECHANNELCLASS_SIGNED_FIXED_POINT ||
               channelClass == tcu::TEXTURECHANNELCLASS_UNSIGNED_FIXED_POINT;
    }
}

bool isTextureTarget(uint32_t target)
{
    return target != GL_RENDERBUFFER;
}

int getTargetTexDims(uint32_t target)
{
    DE_ASSERT(isTextureTarget(target));

    switch (target)
    {
    case GL_TEXTURE_1D:
        return 1;

    case GL_TEXTURE_1D_ARRAY:
    case GL_TEXTURE_2D:
    case GL_TEXTURE_CUBE_MAP:
        return 2;

    case GL_TEXTURE_2D_ARRAY:
    case GL_TEXTURE_3D:
        return 3;

    default:
        DE_ASSERT(false);
        return -1;
    }
}

class RandomizedRenderGrid
{
public:
    RandomizedRenderGrid(const IVec2 &targetSize, const IVec2 &cellSize, int maxCellCount, uint32_t seed);
    bool nextCell(void);
    IVec2 getOrigin(void) const;

    const IVec2 &getCellSize(void) const
    {
        return m_cellSize;
    }
    IVec4 getUsedAreaBoundingBox(void) const;
    int getCellCount(void) const
    {
        return m_cellCount;
    }

private:
    static IVec2 getRandomOffset(uint32_t seed, IVec2 targetSize, IVec2 cellSize, IVec2 grid, int cellCount);

    const IVec2 m_targetSize;
    const IVec2 m_cellSize;
    const IVec2 m_grid;
    int m_currentCell;
    const int m_cellCount;
    const IVec2 m_baseRandomOffset;
};

RandomizedRenderGrid::RandomizedRenderGrid(const IVec2 &targetSize, const IVec2 &cellSize, int maxCellCount,
                                           uint32_t seed)
    : m_targetSize(targetSize)
    , m_cellSize(cellSize)
    , m_grid(targetSize / cellSize)
    , m_currentCell(0)
    // If the grid exactly fits height, take one row for randomization.
    , m_cellCount(deMin32(maxCellCount, ((targetSize.y() % cellSize.y()) == 0) && m_grid.y() > 1 ?
                                            m_grid.x() * (m_grid.y() - 1) :
                                            m_grid.x() * m_grid.y()))
    , m_baseRandomOffset(getRandomOffset(seed, targetSize, cellSize, m_grid, m_cellCount))
{
}

IVec2 RandomizedRenderGrid::getRandomOffset(uint32_t seed, IVec2 targetSize, IVec2 cellSize, IVec2 grid, int cellCount)
{
    de::Random rng(seed);
    IVec2 result;
    IVec2 extraSpace = targetSize - (cellSize * grid);

    // If there'll be unused rows, donate them into extra space.
    // (Round the required rows to full cell row to find out how many rows are unused, multiply by size)
    DE_ASSERT(deDivRoundUp32(cellCount, grid.x()) <= grid.y());
    extraSpace.y() += (grid.y() - deDivRoundUp32(cellCount, grid.x())) * cellSize.y();

    DE_ASSERT(targetSize.x() > cellSize.x() && targetSize.y() > cellSize.y());
    // If grid fits perfectly just one row of cells, just give up on randomizing.
    DE_ASSERT(extraSpace.x() > 0 || extraSpace.y() > 0 || grid.y() == 1);
    DE_ASSERT(extraSpace.x() + grid.x() * cellSize.x() == targetSize.x());

    // \note Putting these as ctor params would make evaluation order undefined, I think <sigh>. Hence,
    // no direct return.
    result.x() = rng.getInt(0, extraSpace.x());
    result.y() = rng.getInt(0, extraSpace.y());
    return result;
}

bool RandomizedRenderGrid::nextCell(void)
{
    if (m_currentCell >= getCellCount())
        return false;

    m_currentCell++;
    return true;
}

IVec2 RandomizedRenderGrid::getOrigin(void) const
{
    const int gridX           = (m_currentCell - 1) % m_grid.x();
    const int gridY           = (m_currentCell - 1) / m_grid.x();
    const IVec2 currentOrigin = (IVec2(gridX, gridY) * m_cellSize) + m_baseRandomOffset;

    DE_ASSERT(currentOrigin.x() >= 0 && (currentOrigin.x() + m_cellSize.x()) <= m_targetSize.x());
    DE_ASSERT(currentOrigin.y() >= 0 && (currentOrigin.y() + m_cellSize.y()) <= m_targetSize.y());

    return currentOrigin;
}

IVec4 RandomizedRenderGrid::getUsedAreaBoundingBox(void) const
{
    const IVec2 lastCell(de::min(m_currentCell + 1, m_grid.x()), ((m_currentCell + m_grid.x() - 1) / m_grid.x()));
    const IVec2 size = lastCell * m_cellSize;

    return IVec4(m_baseRandomOffset.x(), m_baseRandomOffset.y(), size.x(), size.y());
}

class ImageInfo
{
public:
    ImageInfo(uint32_t format, uint32_t target, const IVec3 &size);

    uint32_t getFormat(void) const
    {
        return m_format;
    }
    uint32_t getTarget(void) const
    {
        return m_target;
    }
    const IVec3 &getSize(void) const
    {
        return m_size;
    }

private:
    uint32_t m_format;
    uint32_t m_target;
    IVec3 m_size;
};

ImageInfo::ImageInfo(uint32_t format, uint32_t target, const IVec3 &size)
    : m_format(format)
    , m_target(target)
    , m_size(size)
{
    DE_ASSERT(m_target == GL_TEXTURE_2D_ARRAY || m_target == GL_TEXTURE_3D || m_size.z() == 1);
    DE_ASSERT(isTextureTarget(m_target) || !glu::isCompressedFormat(m_target));
}

SeedBuilder &operator<<(SeedBuilder &builder, const ImageInfo &info)
{
    builder << info.getFormat() << info.getTarget() << info.getSize();
    return builder;
}

const glu::ObjectTraits &getObjectTraits(const ImageInfo &info)
{
    if (isTextureTarget(info.getTarget()))
        return glu::objectTraits(glu::OBJECTTYPE_TEXTURE);
    else
        return glu::objectTraits(glu::OBJECTTYPE_RENDERBUFFER);
}

int getLevelCount(const ImageInfo &info)
{
    const uint32_t target = info.getTarget();
    const IVec3 size      = info.getSize();

    if (target == GL_RENDERBUFFER)
        return 1;
    else if (target == GL_TEXTURE_2D_ARRAY)
    {
        const int maxSize = de::max(size.x(), size.y());

        return deLog2Ceil32(maxSize);
    }
    else
    {
        const int maxSize = de::max(size.x(), de::max(size.y(), size.z()));

        return deLog2Ceil32(maxSize);
    }
}

IVec3 getLevelSize(uint32_t target, const IVec3 &baseSize, int level)
{
    IVec3 size;

    if (target != GL_TEXTURE_2D_ARRAY)
    {
        for (int i = 0; i < 3; i++)
            size[i] = de::max(baseSize[i] >> level, 1);
    }
    else
    {
        for (int i = 0; i < 2; i++)
            size[i] = de::max(baseSize[i] >> level, 1);

        size[2] = baseSize[2];
    }

    return size;
}

uint32_t mapFaceNdxToFace(int ndx)
{
    const uint32_t cubeFaces[] = {GL_TEXTURE_CUBE_MAP_POSITIVE_X, GL_TEXTURE_CUBE_MAP_NEGATIVE_X,

                                  GL_TEXTURE_CUBE_MAP_POSITIVE_Y, GL_TEXTURE_CUBE_MAP_NEGATIVE_Y,

                                  GL_TEXTURE_CUBE_MAP_POSITIVE_Z, GL_TEXTURE_CUBE_MAP_NEGATIVE_Z};

    return de::getSizedArrayElement<6>(cubeFaces, ndx);
}

// Class for iterating over mip levels and faces/slices/... of a texture.
class TextureImageIterator
{
public:
    TextureImageIterator(const ImageInfo info, int levelCount);
    ~TextureImageIterator(void)
    {
    }

    // Need to call next image once, newly constructed not readable, except for getSize
    bool nextImage(void);
    bool hasNextImage(void) const
    {
        return (m_currentLevel < (m_levelCount - 1)) || m_currentImage < (m_levelImageCount - 1);
    }

    int getMipLevel(void) const
    {
        return m_currentLevel;
    }
    int getMipLevelCount(void) const
    {
        return m_levelCount;
    }
    int getCurrentImage(void) const
    {
        return m_currentImage;
    }
    int getLevelImageCount(void) const
    {
        return m_levelImageCount;
    }
    IVec2 getSize(void) const
    {
        return m_levelSize.toWidth<2>();
    } // Assume that image sizes never grow over iteration
    uint32_t getTarget(void) const
    {
        return m_info.getTarget();
    }

private:
    int m_levelImageCount; // Need to be defined in CTOR for the hasNextImage to work!
    const ImageInfo m_info;
    int m_currentLevel;
    IVec3 m_levelSize;
    int m_currentImage;
    const int m_levelCount;
};

TextureImageIterator::TextureImageIterator(const ImageInfo info, int levelCount)
    : m_levelImageCount(info.getTarget() == GL_TEXTURE_CUBE_MAP ? 6 :
                                                                  getLevelSize(info.getTarget(), info.getSize(), 0).z())
    , m_info(info)
    , m_currentLevel(0)
    , m_levelSize(getLevelSize(info.getTarget(), info.getSize(), 0))
    , m_currentImage(-1)
    , m_levelCount(levelCount)
{
    DE_ASSERT(m_levelCount <= getLevelCount(info));
}

bool TextureImageIterator::nextImage(void)
{
    if (!hasNextImage())
        return false;

    m_currentImage++;
    if (m_currentImage == m_levelImageCount)
    {
        m_currentLevel++;
        m_currentImage = 0;

        m_levelSize = getLevelSize(m_info.getTarget(), m_info.getSize(), m_currentLevel);

        if (getTarget() == GL_TEXTURE_CUBE_MAP)
            m_levelImageCount = 6;
        else
            m_levelImageCount = m_levelSize.z();
    }
    DE_ASSERT(m_currentLevel < m_levelCount);
    DE_ASSERT(m_currentImage < m_levelImageCount);
    return true;
}

// Get name
string getTextureImageName(int textureTarget, int mipLevel, int imageIndex)
{
    std::ostringstream result;
    result << "Level";
    result << mipLevel;
    switch (textureTarget)
    {
    case GL_TEXTURE_2D:
        break;
    case GL_TEXTURE_3D:
        result << "Slice" << imageIndex;
        break;
    case GL_TEXTURE_CUBE_MAP:
        result << "Face" << imageIndex;
        break;
    case GL_TEXTURE_2D_ARRAY:
        result << "Layer" << imageIndex;
        break;
    default:
        DE_FATAL("Unsupported texture target");
        break;
    }
    return result.str();
}

// Get description
string getTextureImageDescription(int textureTarget, int mipLevel, int imageIndex)
{
    std::ostringstream result;
    result << "level ";
    result << mipLevel;

    switch (textureTarget)
    {
    case GL_TEXTURE_2D:
        break;
    case GL_TEXTURE_3D:
        result << " and Slice " << imageIndex;
        break;
    case GL_TEXTURE_CUBE_MAP:
        result << " and Face " << imageIndex;
        break;
    case GL_TEXTURE_2D_ARRAY:
        result << " and Layer " << imageIndex;
        break;
    default:
        DE_FATAL("Unsupported texture target");
        break;
    }
    return result.str();
}

// Compute texture coordinates
void computeQuadTexCoords(vector<float> &texCoord, const TextureImageIterator &iteration)
{
    const int currentImage = iteration.getCurrentImage();
    switch (iteration.getTarget())
    {
    case GL_TEXTURE_2D:
        computeQuadTexCoord2D(texCoord, tcu::Vec2(0.0f, 0.0f), tcu::Vec2(1.0f, 1.0f));
        break;

    case GL_TEXTURE_3D:
    {
        const float r = (float(currentImage) + 0.5f) / (float)iteration.getLevelImageCount();
        computeQuadTexCoord3D(texCoord, tcu::Vec3(0.0f, 0.0f, r), tcu::Vec3(1.0f, 1.0f, r), tcu::IVec3(0, 1, 2));
        break;
    }

    case GL_TEXTURE_CUBE_MAP:
        computeQuadTexCoordCube(texCoord, glu::getCubeFaceFromGL(mapFaceNdxToFace(currentImage)));
        break;

    case GL_TEXTURE_2D_ARRAY:
        computeQuadTexCoord2DArray(texCoord, currentImage, tcu::Vec2(0.0f, 0.0f), tcu::Vec2(1.0f, 1.0f));
        break;

    default:
        DE_FATAL("Unsupported texture target");
    }
}

// Struct for storing each reference image with necessary metadata.
struct CellContents
{
    IVec2 origin;
    tcu::Surface reference;
    std::string name;
    std::string description;
};

// Return format that has more restrictions on texel data.
uint32_t getMoreRestrictiveFormat(uint32_t formatA, uint32_t formatB)
{
    if (formatA == formatB)
        return formatA;
    else if (glu::isCompressedFormat(formatA) && isAstcFormat(glu::mapGLCompressedTexFormat(formatA)))
        return formatA;
    else if (glu::isCompressedFormat(formatB) && isAstcFormat(glu::mapGLCompressedTexFormat(formatB)))
        return formatB;
    else if (isFloatFormat(formatA))
    {
        DE_ASSERT(!isFloatFormat(formatB));

        return formatA;
    }
    else if (isFloatFormat(formatB))
    {
        DE_ASSERT(!isFloatFormat(formatA));

        return formatB;
    }
    else if (glu::isCompressedFormat(formatA))
    {
        return formatA;
    }
    else if (glu::isCompressedFormat(formatB))
    {
        return formatB;
    }
    else
        return formatA;
}

int getTexelBlockSize(uint32_t format)
{
    if (glu::isCompressedFormat(format))
        return tcu::getBlockSize(glu::mapGLCompressedTexFormat(format));
    else
        return glu::mapGLInternalFormat(format).getPixelSize();
}

IVec3 getTexelBlockPixelSize(uint32_t format)
{
    if (glu::isCompressedFormat(format))
        return tcu::getBlockPixelSize(glu::mapGLCompressedTexFormat(format));
    else
        return IVec3(1, 1, 1);
}

bool isColorRenderable(uint32_t format)
{
    switch (format)
    {
    case GL_R8:
    case GL_RG8:
    case GL_RGB8:
    case GL_RGB565:
    case GL_RGB4:
    case GL_RGB5_A1:
    case GL_RGBA8:
    case GL_RGB10_A2:
    case GL_RGB10_A2UI:
    case GL_SRGB8_ALPHA8:
    case GL_R8I:
    case GL_R8UI:
    case GL_R16I:
    case GL_R16UI:
    case GL_R32I:
    case GL_R32UI:
    case GL_RG8I:
    case GL_RG8UI:
    case GL_RG16I:
    case GL_RG16UI:
    case GL_RG32I:
    case GL_RG32UI:
    case GL_RGBA8I:
    case GL_RGBA8UI:
    case GL_RGBA16I:
    case GL_RGBA16UI:
    case GL_RGBA32I:
    case GL_RGBA32UI:
        return true;

    default:
        return false;
    }
}

uint32_t getTypeForInternalFormat(uint32_t format)
{
    return glu::getTransferFormat(glu::mapGLInternalFormat(format)).dataType;
}

void genTexel(de::Random &rng, uint32_t glFormat, int texelBlockSize, const int texelCount, uint8_t *buffer)
{
    if (isFloatFormat(glFormat))
    {
        const tcu::TextureFormat format = glu::mapGLInternalFormat(glFormat);
        const tcu::PixelBufferAccess access(format, texelCount, 1, 1, buffer);
        const tcu::TextureFormatInfo info = tcu::getTextureFormatInfo(format);

        for (int texelNdx = 0; texelNdx < texelCount; texelNdx++)
        {
            const float red   = rng.getFloat(info.valueMin.x(), info.valueMax.x());
            const float green = rng.getFloat(info.valueMin.y(), info.valueMax.y());
            const float blue  = rng.getFloat(info.valueMin.z(), info.valueMax.z());
            const float alpha = rng.getFloat(info.valueMin.w(), info.valueMax.w());

            const Vec4 color(red, green, blue, alpha);

            access.setPixel(color, texelNdx, 0, 0);
        }
    }
    else if (glu::isCompressedFormat(glFormat))
    {
        const tcu::CompressedTexFormat compressedFormat = glu::mapGLCompressedTexFormat(glFormat);

        if (tcu::isAstcFormat(compressedFormat))
        {
            const int BLOCK_SIZE               = 16;
            const uint8_t blocks[][BLOCK_SIZE] = {
                // \note All of the following blocks are valid in LDR mode.
                {
                    252,
                    253,
                    255,
                    255,
                    255,
                    255,
                    255,
                    255,
                    8,
                    71,
                    90,
                    78,
                    22,
                    17,
                    26,
                    66,
                },
                {252, 253, 255, 255, 255, 255, 255, 255, 220, 74, 139, 235, 249, 6, 145, 125},
                {252, 253, 255, 255, 255, 255, 255, 255, 223, 251, 28, 206, 54, 251, 160, 174},
                {252, 253, 255, 255, 255, 255, 255, 255, 39, 4, 153, 219, 180, 61, 51, 37},
                {67, 2, 0, 254, 1, 0, 64, 215, 83, 211, 159, 105, 41, 140, 50, 2},
                {67, 130, 0, 170, 84, 255, 65, 215, 83, 211, 159, 105, 41, 140, 50, 2},
                {67, 2, 129, 38, 51, 229, 95, 215, 83, 211, 159, 105, 41, 140, 50, 2},
                {67, 130, 193, 56, 213, 144, 95, 215, 83, 211, 159, 105, 41, 140, 50, 2}};

            DE_ASSERT(texelBlockSize == BLOCK_SIZE);

            for (int i = 0; i < texelCount; i++)
            {
                const int blockNdx = rng.getInt(0, DE_LENGTH_OF_ARRAY(blocks) - 1);

                deMemcpy(buffer + i * BLOCK_SIZE, blocks[blockNdx], BLOCK_SIZE);
            }
        }
        else
        {
            for (int i = 0; i < texelBlockSize * texelCount; i++)
            {
                const uint8_t val = rng.getUint8();

                buffer[i] = val;
            }
        }
    }
    else
    {
        for (int i = 0; i < texelBlockSize * texelCount; i++)
        {
            const uint8_t val = rng.getUint8();

            buffer[i] = val;
        }
    }
}

IVec3 divRoundUp(const IVec3 &a, const IVec3 &b)
{
    IVec3 res;

    for (int i = 0; i < 3; i++)
        res[i] = a[i] / b[i] + ((a[i] % b[i]) ? 1 : 0);

    return res;
}

uint32_t getFormatForInternalFormat(uint32_t format)
{
    return glu::getTransferFormat(glu::mapGLInternalFormat(format)).format;
}

void genericTexImage(const glw::Functions &gl, uint32_t target, int faceNdx, int level, const IVec3 &size,
                     uint32_t format, size_t dataSize, const void *data)
{
    const uint32_t glTarget = (target == GL_TEXTURE_CUBE_MAP ? mapFaceNdxToFace(faceNdx) : target);

    DE_ASSERT(target == GL_TEXTURE_CUBE_MAP || faceNdx == 0);

    if (glu::isCompressedFormat(format))
    {
        switch (getTargetTexDims(target))
        {
        case 2:
            DE_ASSERT(size.z() == 1);
            gl.compressedTexImage2D(glTarget, level, format, (glw::GLsizei)size.x(), (glw::GLsizei)size.y(), 0,
                                    (glw::GLsizei)dataSize, data);
            GLU_EXPECT_NO_ERROR(gl.getError(), "glCompressedTexImage2D failed.");
            break;

        case 3:
            gl.compressedTexImage3D(glTarget, level, format, (glw::GLsizei)size.x(), (glw::GLsizei)size.y(),
                                    (glw::GLsizei)size.z(), 0, (glw::GLsizei)dataSize, data);
            GLU_EXPECT_NO_ERROR(gl.getError(), "glCompressedTexImage3D failed.");
            break;

        default:
            DE_ASSERT(false);
        }
    }
    else
    {
        const uint32_t glFormat = getFormatForInternalFormat(format);
        const uint32_t glType   = getTypeForInternalFormat(format);

        switch (getTargetTexDims(target))
        {
        case 2:
            DE_ASSERT(size.z() == 1);
            gl.texImage2D(glTarget, level, format, (glw::GLsizei)size.x(), (glw::GLsizei)size.y(), 0, glFormat, glType,
                          data);
            GLU_EXPECT_NO_ERROR(gl.getError(), "glTexImage2D failed.");
            break;

        case 3:
            gl.texImage3D(glTarget, level, format, (glw::GLsizei)size.x(), (glw::GLsizei)size.y(),
                          (glw::GLsizei)size.z(), 0, glFormat, glType, data);
            GLU_EXPECT_NO_ERROR(gl.getError(), "glTexImage3D failed.");
            break;

        default:
            DE_ASSERT(false);
        }
    }
}

void genTextureImage(const glw::Functions &gl, de::Random &rng, uint32_t name, vector<ArrayBuffer<uint8_t>> &levels,
                     const ImageInfo &info, uint32_t moreRestrictiveFormat)
{
    const int texelBlockSize        = getTexelBlockSize(info.getFormat());
    const IVec3 texelBlockPixelSize = getTexelBlockPixelSize(info.getFormat());

    levels.resize(getLevelCount(info));

    gl.pixelStorei(GL_UNPACK_ALIGNMENT, 1);
    GLU_EXPECT_NO_ERROR(gl.getError(), "Setting pixel store aligment failed.");

    gl.bindTexture(info.getTarget(), name);
    GLU_EXPECT_NO_ERROR(gl.getError(), "Binding texture failed.");

    for (int levelNdx = 0; levelNdx < getLevelCount(info); levelNdx++)
    {
        ArrayBuffer<uint8_t> &level = levels[levelNdx];

        const int faceCount = (info.getTarget() == GL_TEXTURE_CUBE_MAP ? 6 : 1);

        const IVec3 levelPixelSize      = getLevelSize(info.getTarget(), info.getSize(), levelNdx);
        const IVec3 levelTexelBlockSize = divRoundUp(levelPixelSize, texelBlockPixelSize);
        const int levelTexelBlockCount  = levelTexelBlockSize.x() * levelTexelBlockSize.y() * levelTexelBlockSize.z();
        const int levelSize             = levelTexelBlockCount * texelBlockSize;

        level.setStorage(levelSize * faceCount);

        for (int faceNdx = 0; faceNdx < faceCount; faceNdx++)
        {
            genTexel(rng, moreRestrictiveFormat, texelBlockSize, levelTexelBlockCount,
                     level.getElementPtr(faceNdx * levelSize));

            genericTexImage(gl, info.getTarget(), faceNdx, levelNdx, levelPixelSize, info.getFormat(), levelSize,
                            level.getElementPtr(faceNdx * levelSize));
        }
    }

    gl.texParameteri(info.getTarget(), GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    gl.texParameteri(info.getTarget(), GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

    if (info.getTarget() == GL_TEXTURE_3D)
        gl.texParameteri(info.getTarget(), GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);

    gl.texParameteri(info.getTarget(), GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    gl.texParameteri(info.getTarget(), GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    GLU_EXPECT_NO_ERROR(gl.getError(), "Setting texture parameters failed");

    gl.bindTexture(info.getTarget(), 0);
    GLU_EXPECT_NO_ERROR(gl.getError(), "Unbinding texture failed.");
}

void genRenderbufferImage(const glw::Functions &gl, de::Random &rng, uint32_t name,
                          vector<ArrayBuffer<uint8_t>> &levels, const ImageInfo &info, uint32_t moreRestrictiveFormat)
{
    const IVec3 size                = info.getSize();
    const tcu::TextureFormat format = glu::mapGLInternalFormat(info.getFormat());

    DE_ASSERT(info.getTarget() == GL_RENDERBUFFER);
    DE_ASSERT(info.getSize().z() == 1);
    DE_ASSERT(getLevelCount(info) == 1);
    DE_ASSERT(!glu::isCompressedFormat(info.getFormat()));

    glu::Framebuffer framebuffer(gl);

    levels.resize(1);
    levels[0].setStorage(format.getPixelSize() * size.x() * size.y());
    tcu::PixelBufferAccess refAccess(format, size.x(), size.y(), 1, levels[0].getPtr());

    gl.bindRenderbuffer(GL_RENDERBUFFER, name);
    gl.renderbufferStorage(GL_RENDERBUFFER, info.getFormat(), info.getSize().x(), info.getSize().y());
    GLU_EXPECT_NO_ERROR(gl.getError(), "Binding and setting storage for renderbuffer failed.");

    gl.bindFramebuffer(GL_FRAMEBUFFER, *framebuffer);
    gl.framebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, name);
    GLU_EXPECT_NO_ERROR(gl.getError(), "Binding framebuffer and attaching renderbuffer failed.");

    {
        vector<uint8_t> texelBlock(format.getPixelSize());

        if (isFixedPointFormat(info.getFormat()))
        {
            // All zeroes is only bit pattern that fixed point values can be
            // cleared to and that is valid floating point value.
            if (isFloatFormat(moreRestrictiveFormat))
                deMemset(&texelBlock[0], 0x0, texelBlock.size());
            else
            {
                // Fixed point values can be only cleared to all 0 or 1.
                const int32_t fill = rng.getBool() ? 0xFF : 0x0;
                deMemset(&texelBlock[0], fill, texelBlock.size());
            }
        }
        else
            genTexel(rng, moreRestrictiveFormat, format.getPixelSize(), 1, &(texelBlock[0]));

        {
            const tcu::ConstPixelBufferAccess texelAccess(format, 1, 1, 1, &(texelBlock[0]));

            if (isIntFormat(info.getFormat()))
            {
                const tcu::IVec4 color = texelAccess.getPixelInt(0, 0, 0);

                gl.clearBufferiv(GL_COLOR, 0, (const int32_t *)&color);
                GLU_EXPECT_NO_ERROR(gl.getError(), "Failed to clear renderbuffer.");

                DE_ASSERT(!tcu::isSRGB(format));
                tcu::clear(refAccess, color);
            }
            else if (isUintFormat(info.getFormat()))
            {
                const tcu::IVec4 color = texelAccess.getPixelInt(0, 0, 0);

                gl.clearBufferuiv(GL_COLOR, 0, (const uint32_t *)&color);
                GLU_EXPECT_NO_ERROR(gl.getError(), "Failed to clear renderbuffer.");

                DE_ASSERT(!tcu::isSRGB(format));
                tcu::clear(refAccess, color);
            }
            else
            {
                const tcu::Vec4 rawColor    = texelAccess.getPixel(0, 0, 0);
                const tcu::Vec4 linearColor = (tcu::isSRGB(format) ? tcu::sRGBToLinear(rawColor) : rawColor);

                // rawColor bit pattern has been chosen to be "safe" in the destination format. For sRGB
                // formats, the clear color is in linear space. Since we want the resulting bit pattern
                // to be safe after implementation linear->sRGB transform, we must apply the inverting
                // transform to the clear color.

                if (isFloatFormat(info.getFormat()))
                {
                    gl.clearBufferfv(GL_COLOR, 0, (const float *)&linearColor);
                }
                else
                {
                    // fixed-point
                    gl.clearColor(linearColor.x(), linearColor.y(), linearColor.z(), linearColor.w());
                    gl.clear(GL_COLOR_BUFFER_BIT);
                }
                GLU_EXPECT_NO_ERROR(gl.getError(), "Failed to clear renderbuffer.");

                tcu::clear(refAccess, rawColor);
            }
        }
    }

    gl.bindRenderbuffer(GL_RENDERBUFFER, 0);
    gl.bindFramebuffer(GL_FRAMEBUFFER, 0);
    GLU_EXPECT_NO_ERROR(gl.getError(), "Failed to unbind renderbufer and framebuffer.");
}

void genImage(const glw::Functions &gl, de::Random &rng, uint32_t name, vector<ArrayBuffer<uint8_t>> &levels,
              const ImageInfo &info, uint32_t moreRestrictiveFormat)
{
    if (isTextureTarget(info.getTarget()))
        genTextureImage(gl, rng, name, levels, info, moreRestrictiveFormat);
    else
        genRenderbufferImage(gl, rng, name, levels, info, moreRestrictiveFormat);
}

IVec3 getTexelBlockStride(const ImageInfo &info, int level)
{
    const IVec3 size                  = getLevelSize(info.getTarget(), info.getSize(), level);
    const int texelBlockSize          = getTexelBlockSize(info.getFormat());
    const IVec3 texelBlockPixelSize   = getTexelBlockPixelSize(info.getFormat());
    const IVec3 textureTexelBlockSize = divRoundUp(size, texelBlockPixelSize);

    return IVec3(texelBlockSize, textureTexelBlockSize.x() * texelBlockSize,
                 textureTexelBlockSize.x() * textureTexelBlockSize.y() * texelBlockSize);
}

int sumComponents(const IVec3 &v)
{
    int s = 0;

    for (int i = 0; i < 3; i++)
        s += v[i];

    return s;
}

void copyImageData(vector<ArrayBuffer<uint8_t>> &dstImageData, const ImageInfo &dstImageInfo, int dstLevel,
                   const IVec3 &dstPos,

                   const vector<ArrayBuffer<uint8_t>> &srcImageData, const ImageInfo &srcImageInfo, int srcLevel,
                   const IVec3 &srcPos,

                   const IVec3 &copySize)
{
    const ArrayBuffer<uint8_t> &srcLevelData = srcImageData[srcLevel];
    ArrayBuffer<uint8_t> &dstLevelData       = dstImageData[dstLevel];

    const IVec3 srcTexelBlockPixelSize = getTexelBlockPixelSize(srcImageInfo.getFormat());
    const int srcTexelBlockSize        = getTexelBlockSize(srcImageInfo.getFormat());
    const IVec3 srcTexelPos            = srcPos / srcTexelBlockPixelSize;
    const IVec3 srcTexelBlockStride    = getTexelBlockStride(srcImageInfo, srcLevel);

    const IVec3 dstTexelBlockPixelSize = getTexelBlockPixelSize(dstImageInfo.getFormat());
    const int dstTexelBlockSize        = getTexelBlockSize(dstImageInfo.getFormat());
    const IVec3 dstTexelPos            = dstPos / dstTexelBlockPixelSize;
    const IVec3 dstTexelBlockStride    = getTexelBlockStride(dstImageInfo, dstLevel);

    const IVec3 copyTexelBlockCount = copySize / srcTexelBlockPixelSize;
    const int texelBlockSize        = srcTexelBlockSize;

    DE_ASSERT(srcTexelBlockSize == dstTexelBlockSize);
    DE_UNREF(dstTexelBlockSize);

    DE_ASSERT((copySize.x() % srcTexelBlockPixelSize.x()) == 0);
    DE_ASSERT((copySize.y() % srcTexelBlockPixelSize.y()) == 0);
    DE_ASSERT((copySize.z() % srcTexelBlockPixelSize.z()) == 0);

    DE_ASSERT((srcPos.x() % srcTexelBlockPixelSize.x()) == 0);
    DE_ASSERT((srcPos.y() % srcTexelBlockPixelSize.y()) == 0);
    DE_ASSERT((srcPos.z() % srcTexelBlockPixelSize.z()) == 0);

    for (int z = 0; z < copyTexelBlockCount.z(); z++)
        for (int y = 0; y < copyTexelBlockCount.y(); y++)
        {
            const IVec3 blockPos(0, y, z);
            const uint8_t *const srcPtr =
                srcLevelData.getElementPtr(sumComponents((srcTexelPos + blockPos) * srcTexelBlockStride));
            uint8_t *const dstPtr =
                dstLevelData.getElementPtr(sumComponents((dstTexelPos + blockPos) * dstTexelBlockStride));
            const int copyLineSize = copyTexelBlockCount.x() * texelBlockSize;

            deMemcpy(dstPtr, srcPtr, copyLineSize);
        }
}

vector<tcu::ConstPixelBufferAccess> getLevelAccesses(const vector<ArrayBuffer<uint8_t>> &data, const ImageInfo &info)
{
    const tcu::TextureFormat format = glu::mapGLInternalFormat(info.getFormat());
    const IVec3 size                = info.getSize();

    vector<tcu::ConstPixelBufferAccess> result;

    DE_ASSERT((int)data.size() == getLevelCount(info));

    for (int level = 0; level < (int)data.size(); level++)
    {
        const IVec3 levelSize = getLevelSize(info.getTarget(), size, level);

        result.push_back(
            tcu::ConstPixelBufferAccess(format, levelSize.x(), levelSize.y(), levelSize.z(), data[level].getPtr()));
    }

    return result;
}

vector<tcu::ConstPixelBufferAccess> getCubeLevelAccesses(const vector<ArrayBuffer<uint8_t>> &data,
                                                         const ImageInfo &info, int faceNdx)
{
    const tcu::TextureFormat format = glu::mapGLInternalFormat(info.getFormat());
    const IVec3 size                = info.getSize();
    const int texelBlockSize        = getTexelBlockSize(info.getFormat());
    const IVec3 texelBlockPixelSize = getTexelBlockPixelSize(info.getFormat());
    vector<tcu::ConstPixelBufferAccess> result;

    DE_ASSERT(info.getTarget() == GL_TEXTURE_CUBE_MAP);
    DE_ASSERT((int)data.size() == getLevelCount(info));

    for (int level = 0; level < (int)data.size(); level++)
    {
        const IVec3 levelPixelSize      = getLevelSize(info.getTarget(), size, level);
        const IVec3 levelTexelBlockSize = divRoundUp(levelPixelSize, texelBlockPixelSize);
        const int levelTexelBlockCount  = levelTexelBlockSize.x() * levelTexelBlockSize.y() * levelTexelBlockSize.z();
        const int levelSize             = levelTexelBlockCount * texelBlockSize;

        result.push_back(tcu::ConstPixelBufferAccess(format, levelPixelSize.x(), levelPixelSize.y(), levelPixelSize.z(),
                                                     data[level].getElementPtr(levelSize * faceNdx)));
    }

    return result;
}

void copyImage(const glw::Functions &gl,

               uint32_t dstName, vector<ArrayBuffer<uint8_t>> &dstImageData, const ImageInfo &dstImageInfo,
               int dstLevel, const IVec3 &dstPos,

               uint32_t srcName, const vector<ArrayBuffer<uint8_t>> &srcImageData, const ImageInfo &srcImageInfo,
               int srcLevel, const IVec3 &srcPos,

               const IVec3 &copySize)
{
    gl.copyImageSubData(srcName, srcImageInfo.getTarget(), srcLevel, srcPos.x(), srcPos.y(), srcPos.z(), dstName,
                        dstImageInfo.getTarget(), dstLevel, dstPos.x(), dstPos.y(), dstPos.z(), copySize.x(),
                        copySize.y(), copySize.z());

    GLU_EXPECT_NO_ERROR(gl.getError(), "glCopyImageSubData failed.");

    copyImageData(dstImageData, dstImageInfo, dstLevel, dstPos, srcImageData, srcImageInfo, srcLevel, srcPos, copySize);
}

template <class TextureView>
void renderTexture(glu::RenderContext &renderContext, TextureRenderer &renderer, ReferenceParams &renderParams,
                   tcu::ResultCollector &results, de::Random &rng, const TextureView &refTexture, const Verify verify,
                   TextureImageIterator &imageIterator, tcu::TestLog &log)
{
    const tcu::RenderTarget &renderTarget = renderContext.getRenderTarget();
    const tcu::RGBA threshold             = renderTarget.getPixelFormat().getColorThreshold() + tcu::RGBA(1, 1, 1, 1);
    const glw::Functions &gl              = renderContext.getFunctions();
    const IVec2 renderTargetSize          = IVec2(renderTarget.getWidth(), renderTarget.getHeight());

    while (imageIterator.hasNextImage())
    {
        // \note: Reserve space upfront to avoid assigning tcu::Surface, which incurs buffer mem copy. Using a
        // conservative estimate for simplicity
        const int imagesOnLevel = imageIterator.getLevelImageCount();
        const int imageEstimate = (imageIterator.getMipLevelCount() - imageIterator.getMipLevel()) * imagesOnLevel;
        RandomizedRenderGrid renderGrid(renderTargetSize, imageIterator.getSize(), imageEstimate, rng.getUint32());
        vector<CellContents> cellContents(renderGrid.getCellCount());
        int cellsUsed = 0;

        // \note: Ordering of conditions is significant. If put the other way around, the code would skip one of the
        // images if the grid runs out of cells before the texture runs out of images. Advancing one grid cell over the
        // needed number has no negative impact.
        while (renderGrid.nextCell() && imageIterator.nextImage())
        {
            const int level       = imageIterator.getMipLevel();
            const IVec2 levelSize = imageIterator.getSize();
            const IVec2 origin    = renderGrid.getOrigin();
            vector<float> texCoord;

            DE_ASSERT(imageIterator.getTarget() != GL_TEXTURE_CUBE_MAP || levelSize.x() >= 4 || levelSize.y() >= 4);

            renderParams.baseLevel = level;
            renderParams.maxLevel  = level;

            gl.texParameteri(imageIterator.getTarget(), GL_TEXTURE_BASE_LEVEL, level);
            gl.texParameteri(imageIterator.getTarget(), GL_TEXTURE_MAX_LEVEL, level);

            computeQuadTexCoords(texCoord, imageIterator);

            // Setup base viewport.
            gl.viewport(origin.x(), origin.y(), levelSize.x(), levelSize.y());

            // Draw.
            renderer.renderQuad(0, &texCoord[0], renderParams);
            GLU_EXPECT_NO_ERROR(gl.getError(), "Failed to render.");

            if (verify == VERIFY_COMPARE_REFERENCE)
            {
                const int target     = imageIterator.getTarget();
                const int imageIndex = imageIterator.getCurrentImage();

                cellContents[cellsUsed].origin      = origin;
                cellContents[cellsUsed].name        = getTextureImageName(target, level, imageIndex);
                cellContents[cellsUsed].description = getTextureImageDescription(target, level, imageIndex);

                cellContents[cellsUsed].reference.setSize(levelSize.x(), levelSize.y());

                // Compute reference.
                sampleTexture(tcu::SurfaceAccess(cellContents[cellsUsed].reference,
                                                 renderContext.getRenderTarget().getPixelFormat()),
                              refTexture, &texCoord[0], renderParams);
                cellsUsed++;
            }
        }

        if (cellsUsed > 0)
        {
            const IVec4 boundingBox = renderGrid.getUsedAreaBoundingBox();
            tcu::Surface renderedFrame(boundingBox[2], boundingBox[3]);

            glu::readPixels(renderContext, boundingBox.x(), boundingBox.y(), renderedFrame.getAccess());
            GLU_EXPECT_NO_ERROR(gl.getError(), "Failed to read pixels.");

            for (int idx = 0; idx < cellsUsed; idx++)
            {
                const CellContents &cell(cellContents[idx]);
                const IVec2 cellOrigin = cell.origin - boundingBox.toWidth<2>();
                const tcu::ConstPixelBufferAccess resultAccess =
                    getSubregion(renderedFrame.getAccess(), cellOrigin.x(), cellOrigin.y(), cell.reference.getWidth(),
                                 cell.reference.getHeight());

                if (!intThresholdCompare(log, cell.name.c_str(), cell.description.c_str(), cell.reference.getAccess(),
                                         resultAccess, threshold.toIVec().cast<uint32_t>(), tcu::COMPARE_LOG_ON_ERROR))
                    results.fail("Image comparison of " + cell.description + " failed.");
                else
                    log << TestLog::Message << "Image comparison of " << cell.description << " passed."
                        << TestLog::EndMessage;
            }
        }
    }

    gl.texParameteri(imageIterator.getTarget(), GL_TEXTURE_BASE_LEVEL, 0);
    gl.texParameteri(imageIterator.getTarget(), GL_TEXTURE_MAX_LEVEL, 1000);
}

void renderTexture2DView(tcu::TestContext &testContext, glu::RenderContext &renderContext, TextureRenderer &renderer,
                         tcu::ResultCollector &results, de::Random &rng, uint32_t name, const ImageInfo &info,
                         const tcu::Texture2DView &refTexture, Verify verify)
{
    tcu::TestLog &log                 = testContext.getLog();
    const glw::Functions &gl          = renderContext.getFunctions();
    const tcu::TextureFormat format   = refTexture.getLevel(0).getFormat();
    const tcu::TextureFormatInfo spec = tcu::getTextureFormatInfo(format);

    ReferenceParams renderParams(TEXTURETYPE_2D);
    TextureImageIterator imageIterator(info, getLevelCount(info));

    renderParams.samplerType = getSamplerType(format);
    renderParams.sampler     = Sampler(Sampler::CLAMP_TO_EDGE, Sampler::CLAMP_TO_EDGE, Sampler::CLAMP_TO_EDGE,
                                       Sampler::NEAREST_MIPMAP_NEAREST, Sampler::NEAREST);
    renderParams.colorScale  = spec.lookupScale;
    renderParams.colorBias   = spec.lookupBias;

    gl.activeTexture(GL_TEXTURE0);
    gl.bindTexture(GL_TEXTURE_2D, name);
    GLU_EXPECT_NO_ERROR(gl.getError(), "Failed to bind texture.");

    gl.texParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    gl.texParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    gl.texParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
    gl.texParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    GLU_EXPECT_NO_ERROR(gl.getError(), "Failed to setup texture filtering state.");

    renderTexture<tcu::Texture2DView>(renderContext, renderer, renderParams, results, rng, refTexture, verify,
                                      imageIterator, log);

    gl.bindTexture(GL_TEXTURE_2D, 0);
    GLU_EXPECT_NO_ERROR(gl.getError(), "Failed to unbind texture.");
}

void decompressTextureLevel(const tcu::TexDecompressionParams &params, ArrayBuffer<uint8_t> &levelData,
                            tcu::PixelBufferAccess &levelAccess, const tcu::CompressedTexFormat &compressedFormat,
                            const tcu::TextureFormat &decompressedFormat, const IVec3 &levelPixelSize, const void *data)
{
    levelData.setStorage(levelPixelSize.x() * levelPixelSize.y() * levelPixelSize.z() *
                         decompressedFormat.getPixelSize());
    levelAccess = tcu::PixelBufferAccess(decompressedFormat, levelPixelSize.x(), levelPixelSize.y(), levelPixelSize.z(),
                                         levelData.getPtr());

    tcu::decompress(levelAccess, compressedFormat, (const uint8_t *)data, params);
}

void decompressTexture(vector<ArrayBuffer<uint8_t>> &levelDatas, vector<tcu::PixelBufferAccess> &levelAccesses,
                       glu::RenderContext &renderContext, const ImageInfo &info,
                       const vector<ArrayBuffer<uint8_t>> &data)
{
    const tcu::CompressedTexFormat compressedFormat = glu::mapGLCompressedTexFormat(info.getFormat());
    const tcu::TextureFormat decompressedFormat     = tcu::getUncompressedFormat(compressedFormat);
    const IVec3 size                                = info.getSize();
    const bool isES32 = glu::contextSupports(renderContext.getType(), glu::ApiType::es(3, 2));

    de::UniquePtr<glu::ContextInfo> ctxInfo(glu::ContextInfo::create(renderContext));
    tcu::TexDecompressionParams decompressParams;

    if (tcu::isAstcFormat(compressedFormat))
    {
        if (ctxInfo->isExtensionSupported("GL_KHR_texture_compression_astc_hdr") &&
            !tcu::isAstcSRGBFormat(compressedFormat))
            decompressParams = tcu::TexDecompressionParams(tcu::TexDecompressionParams::ASTCMODE_HDR);
        else if (isES32 || ctxInfo->isExtensionSupported("GL_KHR_texture_compression_astc_ldr"))
            decompressParams = tcu::TexDecompressionParams(tcu::TexDecompressionParams::ASTCMODE_LDR);
        else
            DE_ASSERT(false);
    }

    levelDatas.resize(getLevelCount(info));
    levelAccesses.resize(getLevelCount(info));

    for (int level = 0; level < getLevelCount(info); level++)
    {
        const IVec3 levelPixelSize          = getLevelSize(info.getTarget(), size, level);
        de::ArrayBuffer<uint8_t> &levelData = levelDatas[level];
        tcu::PixelBufferAccess &levelAccess = levelAccesses[level];

        decompressTextureLevel(decompressParams, levelData, levelAccess, compressedFormat, decompressedFormat,
                               levelPixelSize, data[level].getPtr());
    }
}

void renderTexture2D(tcu::TestContext &testContext, glu::RenderContext &renderContext, TextureRenderer &textureRenderer,
                     tcu::ResultCollector &results, de::Random &rng, uint32_t name,
                     const vector<ArrayBuffer<uint8_t>> &data, const ImageInfo &info, Verify verify)
{
    if (glu::isCompressedFormat(info.getFormat()))
    {
        vector<de::ArrayBuffer<uint8_t>> levelDatas;
        vector<tcu::PixelBufferAccess> levelAccesses;

        decompressTexture(levelDatas, levelAccesses, renderContext, info, data);

        {
            const tcu::Texture2DView refTexture((int)levelAccesses.size(), &(levelAccesses[0]));

            renderTexture2DView(testContext, renderContext, textureRenderer, results, rng, name, info, refTexture,
                                verify);
        }
    }
    else
    {
        const vector<tcu::ConstPixelBufferAccess> levelAccesses = getLevelAccesses(data, info);
        const tcu::Texture2DView refTexture((int)levelAccesses.size(), &(levelAccesses[0]));

        renderTexture2DView(testContext, renderContext, textureRenderer, results, rng, name, info, refTexture, verify);
    }
}

void renderTexture3DView(tcu::TestContext &testContext, glu::RenderContext &renderContext, TextureRenderer &renderer,
                         tcu::ResultCollector &results, de::Random &rng, uint32_t name, const ImageInfo &info,
                         const tcu::Texture3DView &refTexture, Verify verify)
{
    tcu::TestLog &log                 = testContext.getLog();
    const glw::Functions &gl          = renderContext.getFunctions();
    const tcu::TextureFormat format   = refTexture.getLevel(0).getFormat();
    const tcu::TextureFormatInfo spec = tcu::getTextureFormatInfo(format);

    ReferenceParams renderParams(TEXTURETYPE_3D);
    TextureImageIterator imageIterator(info, getLevelCount(info));

    renderParams.samplerType = getSamplerType(format);
    renderParams.sampler     = Sampler(Sampler::CLAMP_TO_EDGE, Sampler::CLAMP_TO_EDGE, Sampler::CLAMP_TO_EDGE,
                                       Sampler::NEAREST_MIPMAP_NEAREST, Sampler::NEAREST);
    renderParams.colorScale  = spec.lookupScale;
    renderParams.colorBias   = spec.lookupBias;

    gl.activeTexture(GL_TEXTURE0);
    gl.bindTexture(GL_TEXTURE_3D, name);
    GLU_EXPECT_NO_ERROR(gl.getError(), "Failed to bind texture.");

    gl.texParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    gl.texParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    gl.texParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
    gl.texParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
    gl.texParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    GLU_EXPECT_NO_ERROR(gl.getError(), "Failed to setup texture filtering state.");

    renderTexture<tcu::Texture3DView>(renderContext, renderer, renderParams, results, rng, refTexture, verify,
                                      imageIterator, log);

    gl.bindTexture(GL_TEXTURE_3D, 0);
    GLU_EXPECT_NO_ERROR(gl.getError(), "Failed to unbind texture.");
}

void renderTexture3D(tcu::TestContext &testContext, glu::RenderContext &renderContext, TextureRenderer &textureRenderer,
                     tcu::ResultCollector &results, de::Random &rng, uint32_t name,
                     const vector<ArrayBuffer<uint8_t>> &data, const ImageInfo &info, Verify verify)
{
    if (glu::isCompressedFormat(info.getFormat()))
    {
        vector<de::ArrayBuffer<uint8_t>> levelDatas;
        vector<tcu::PixelBufferAccess> levelAccesses;

        decompressTexture(levelDatas, levelAccesses, renderContext, info, data);

        {
            const tcu::Texture3DView refTexture((int)levelAccesses.size(), &(levelAccesses[0]));

            renderTexture3DView(testContext, renderContext, textureRenderer, results, rng, name, info, refTexture,
                                verify);
        }
    }
    else
    {
        const vector<tcu::ConstPixelBufferAccess> levelAccesses = getLevelAccesses(data, info);
        const tcu::Texture3DView refTexture((int)levelAccesses.size(), &(levelAccesses[0]));

        renderTexture3DView(testContext, renderContext, textureRenderer, results, rng, name, info, refTexture, verify);
    }
}

void renderTextureCubemapView(tcu::TestContext &testContext, glu::RenderContext &renderContext,
                              TextureRenderer &renderer, tcu::ResultCollector &results, de::Random &rng, uint32_t name,
                              const ImageInfo &info, const tcu::TextureCubeView &refTexture, Verify verify)
{
    tcu::TestLog &log                 = testContext.getLog();
    const glw::Functions &gl          = renderContext.getFunctions();
    const tcu::TextureFormat format   = refTexture.getLevelFace(0, tcu::CUBEFACE_POSITIVE_X).getFormat();
    const tcu::TextureFormatInfo spec = tcu::getTextureFormatInfo(format);

    ReferenceParams renderParams(TEXTURETYPE_CUBE);
    // \note It seems we can't reliably sample two smallest texture levels with cubemaps
    TextureImageIterator imageIterator(info, getLevelCount(info) - 2);

    renderParams.samplerType = getSamplerType(format);
    renderParams.sampler     = Sampler(Sampler::CLAMP_TO_EDGE, Sampler::CLAMP_TO_EDGE, Sampler::CLAMP_TO_EDGE,
                                       Sampler::NEAREST_MIPMAP_NEAREST, Sampler::NEAREST);
    renderParams.colorScale  = spec.lookupScale;
    renderParams.colorBias   = spec.lookupBias;

    gl.activeTexture(GL_TEXTURE0);
    gl.bindTexture(GL_TEXTURE_CUBE_MAP, name);
    GLU_EXPECT_NO_ERROR(gl.getError(), "Failed to bind texture.");

    gl.texParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    gl.texParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    gl.texParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
    gl.texParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    GLU_EXPECT_NO_ERROR(gl.getError(), "Failed to setup texture filtering state.");

    renderTexture<tcu::TextureCubeView>(renderContext, renderer, renderParams, results, rng, refTexture, verify,
                                        imageIterator, log);

    gl.bindTexture(GL_TEXTURE_CUBE_MAP, 0);
    GLU_EXPECT_NO_ERROR(gl.getError(), "Failed to unbind texture.");
}

void renderTextureCubemap(tcu::TestContext &testContext, glu::RenderContext &renderContext,
                          TextureRenderer &textureRenderer, tcu::ResultCollector &results, de::Random &rng,
                          uint32_t name, const vector<ArrayBuffer<uint8_t>> &data, const ImageInfo &info, Verify verify)
{
    if (glu::isCompressedFormat(info.getFormat()))
    {
        const tcu::CompressedTexFormat &compressedFormat = glu::mapGLCompressedTexFormat(info.getFormat());
        const tcu::TextureFormat &decompressedFormat     = tcu::getUncompressedFormat(compressedFormat);

        const int texelBlockSize        = getTexelBlockSize(info.getFormat());
        const IVec3 texelBlockPixelSize = getTexelBlockPixelSize(info.getFormat());

        const bool isES32 = glu::contextSupports(renderContext.getType(), glu::ApiType::es(3, 2));

        vector<tcu::PixelBufferAccess> levelAccesses[6];
        vector<ArrayBuffer<uint8_t>> levelDatas[6];
        de::UniquePtr<glu::ContextInfo> ctxInfo(glu::ContextInfo::create(renderContext));
        tcu::TexDecompressionParams decompressParams;

        if (tcu::isAstcFormat(compressedFormat))
        {
            if (ctxInfo->isExtensionSupported("GL_KHR_texture_compression_astc_hdr") &&
                !tcu::isAstcSRGBFormat(compressedFormat))
                decompressParams = tcu::TexDecompressionParams(tcu::TexDecompressionParams::ASTCMODE_HDR);
            else if (isES32 || ctxInfo->isExtensionSupported("GL_KHR_texture_compression_astc_ldr"))
                decompressParams = tcu::TexDecompressionParams(tcu::TexDecompressionParams::ASTCMODE_LDR);
            else
                DE_ASSERT(false);
        }

        for (int faceNdx = 0; faceNdx < 6; faceNdx++)
        {
            levelAccesses[faceNdx].resize(getLevelCount(info));
            levelDatas[faceNdx].resize(getLevelCount(info));
        }

        for (int level = 0; level < getLevelCount(info); level++)
        {
            for (int faceNdx = 0; faceNdx < 6; faceNdx++)
            {
                const IVec3 levelPixelSize      = getLevelSize(info.getTarget(), info.getSize(), level);
                const IVec3 levelTexelBlockSize = divRoundUp(levelPixelSize, texelBlockPixelSize);
                const int levelTexelBlockCount =
                    levelTexelBlockSize.x() * levelTexelBlockSize.y() * levelTexelBlockSize.z();
                const int levelSize = levelTexelBlockCount * texelBlockSize;

                const uint8_t *dataPtr              = data[level].getElementPtr(faceNdx * levelSize);
                tcu::PixelBufferAccess &levelAccess = levelAccesses[faceNdx][level];
                ArrayBuffer<uint8_t> &levelData     = levelDatas[faceNdx][level];

                decompressTextureLevel(decompressParams, levelData, levelAccess, compressedFormat, decompressedFormat,
                                       levelPixelSize, dataPtr);
            }
        }

        const tcu::ConstPixelBufferAccess *levels[6];

        for (int faceNdx = 0; faceNdx < 6; faceNdx++)
            levels[glu::getCubeFaceFromGL(mapFaceNdxToFace(faceNdx))] = &(levelAccesses[faceNdx][0]);

        {
            const tcu::TextureCubeView refTexture(getLevelCount(info), levels);

            renderTextureCubemapView(testContext, renderContext, textureRenderer, results, rng, name, info, refTexture,
                                     verify);
        }
    }
    else
    {
        const vector<tcu::ConstPixelBufferAccess> levelAccesses[6] = {
            getCubeLevelAccesses(data, info, 0), getCubeLevelAccesses(data, info, 1),
            getCubeLevelAccesses(data, info, 2), getCubeLevelAccesses(data, info, 3),
            getCubeLevelAccesses(data, info, 4), getCubeLevelAccesses(data, info, 5),
        };

        const tcu::ConstPixelBufferAccess *levels[6];

        for (int faceNdx = 0; faceNdx < 6; faceNdx++)
            levels[glu::getCubeFaceFromGL(mapFaceNdxToFace(faceNdx))] = &(levelAccesses[faceNdx][0]);

        {
            const tcu::TextureCubeView refTexture(getLevelCount(info), levels);

            renderTextureCubemapView(testContext, renderContext, textureRenderer, results, rng, name, info, refTexture,
                                     verify);
        }
    }
}

void renderTexture2DArrayView(tcu::TestContext &testContext, glu::RenderContext &renderContext,
                              TextureRenderer &renderer, tcu::ResultCollector &results, de::Random &rng, uint32_t name,
                              const ImageInfo &info, const tcu::Texture2DArrayView &refTexture, Verify verify)
{
    tcu::TestLog &log                 = testContext.getLog();
    const glw::Functions &gl          = renderContext.getFunctions();
    const tcu::TextureFormat format   = refTexture.getLevel(0).getFormat();
    const tcu::TextureFormatInfo spec = tcu::getTextureFormatInfo(format);

    ReferenceParams renderParams(TEXTURETYPE_2D_ARRAY);
    TextureImageIterator imageIterator(info, getLevelCount(info));

    renderParams.samplerType = getSamplerType(format);
    renderParams.sampler     = Sampler(Sampler::CLAMP_TO_EDGE, Sampler::CLAMP_TO_EDGE, Sampler::CLAMP_TO_EDGE,
                                       Sampler::NEAREST_MIPMAP_NEAREST, Sampler::NEAREST);
    renderParams.colorScale  = spec.lookupScale;
    renderParams.colorBias   = spec.lookupBias;

    gl.activeTexture(GL_TEXTURE0);
    gl.bindTexture(GL_TEXTURE_2D_ARRAY, name);
    GLU_EXPECT_NO_ERROR(gl.getError(), "Failed to bind texture.");

    gl.texParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    gl.texParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    gl.texParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
    gl.texParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    GLU_EXPECT_NO_ERROR(gl.getError(), "Failed to setup texture filtering state.");

    renderTexture<tcu::Texture2DArrayView>(renderContext, renderer, renderParams, results, rng, refTexture, verify,
                                           imageIterator, log);

    gl.bindTexture(GL_TEXTURE_2D_ARRAY, 0);
    GLU_EXPECT_NO_ERROR(gl.getError(), "Failed to unbind texture.");
}

void renderTexture2DArray(tcu::TestContext &testContext, glu::RenderContext &renderContext,
                          TextureRenderer &textureRenderer, tcu::ResultCollector &results, de::Random &rng,
                          uint32_t name, const vector<ArrayBuffer<uint8_t>> &data, const ImageInfo &info, Verify verify)
{
    if (glu::isCompressedFormat(info.getFormat()))
    {
        vector<de::ArrayBuffer<uint8_t>> levelDatas;
        vector<tcu::PixelBufferAccess> levelAccesses;

        decompressTexture(levelDatas, levelAccesses, renderContext, info, data);

        {
            const tcu::Texture2DArrayView refTexture((int)levelAccesses.size(), &(levelAccesses[0]));

            renderTexture2DArrayView(testContext, renderContext, textureRenderer, results, rng, name, info, refTexture,
                                     verify);
        }
    }
    else
    {
        const vector<tcu::ConstPixelBufferAccess> levelAccesses = getLevelAccesses(data, info);
        const tcu::Texture2DArrayView refTexture((int)levelAccesses.size(), &(levelAccesses[0]));

        renderTexture2DArrayView(testContext, renderContext, textureRenderer, results, rng, name, info, refTexture,
                                 verify);
    }
}

tcu::TextureFormat getReadPixelFormat(const tcu::TextureFormat &format)
{
    switch (tcu::getTextureChannelClass(format.type))
    {
    case tcu::TEXTURECHANNELCLASS_FLOATING_POINT:
    case tcu::TEXTURECHANNELCLASS_SIGNED_FIXED_POINT:
    case tcu::TEXTURECHANNELCLASS_UNSIGNED_FIXED_POINT:
        return tcu::TextureFormat(tcu::TextureFormat::RGBA, tcu::TextureFormat::UNORM_INT8);

    case tcu::TEXTURECHANNELCLASS_SIGNED_INTEGER:
        return tcu::TextureFormat(tcu::TextureFormat::RGBA, tcu::TextureFormat::SIGNED_INT32);

    case tcu::TEXTURECHANNELCLASS_UNSIGNED_INTEGER:
        return tcu::TextureFormat(tcu::TextureFormat::RGBA, tcu::TextureFormat::UNSIGNED_INT32);

    default:
        DE_ASSERT(false);
        return tcu::TextureFormat();
    }
}

Vec4 calculateThreshold(const tcu::TextureFormat &sourceFormat, const tcu::TextureFormat &readPixelsFormat)
{
    DE_ASSERT(tcu::getTextureChannelClass(sourceFormat.type) != tcu::TEXTURECHANNELCLASS_FLOATING_POINT);
    DE_ASSERT(tcu::getTextureChannelClass(readPixelsFormat.type) != tcu::TEXTURECHANNELCLASS_FLOATING_POINT);

    DE_ASSERT(tcu::getTextureChannelClass(sourceFormat.type) != tcu::TEXTURECHANNELCLASS_SIGNED_INTEGER);
    DE_ASSERT(tcu::getTextureChannelClass(readPixelsFormat.type) != tcu::TEXTURECHANNELCLASS_SIGNED_INTEGER);

    DE_ASSERT(tcu::getTextureChannelClass(sourceFormat.type) != tcu::TEXTURECHANNELCLASS_UNSIGNED_INTEGER);
    DE_ASSERT(tcu::getTextureChannelClass(readPixelsFormat.type) != tcu::TEXTURECHANNELCLASS_UNSIGNED_INTEGER);

    {
        const tcu::IVec4 srcBits  = tcu::getTextureFormatBitDepth(sourceFormat);
        const tcu::IVec4 readBits = tcu::getTextureFormatBitDepth(readPixelsFormat);
        const tcu::IVec4 minBits  = tcu::min(srcBits, readBits);

        return Vec4(minBits[0] ? 1.0f / (float)((1 << minBits[0]) - 1) : 0,
                    minBits[1] ? 1.0f / (float)((1 << minBits[1]) - 1) : 0,
                    minBits[2] ? 1.0f / (float)((1 << minBits[2]) - 1) : 0,
                    minBits[3] ? 1.0f / (float)((1 << minBits[3]) - 1) : 0);
    }
}

void renderRenderbuffer(tcu::TestContext &testContext, glu::RenderContext &renderContext, tcu::ResultCollector &results,
                        uint32_t name, const vector<ArrayBuffer<uint8_t>> &data, const ImageInfo &info, Verify verify)
{
    const glw::Functions &gl = renderContext.getFunctions();
    TestLog &log             = testContext.getLog();

    const tcu::TextureFormat format = glu::mapGLInternalFormat(info.getFormat());
    const IVec3 size                = info.getSize();
    const tcu::ConstPixelBufferAccess refRenderbuffer(format, size.x(), size.y(), 1, data[0].getPtr());
    const tcu::TextureFormat readPixelsFormat = getReadPixelFormat(format);
    tcu::TextureLevel renderbuffer(readPixelsFormat, size.x(), size.y());

    DE_ASSERT(size.z() == 1);
    DE_ASSERT(data.size() == 1);

    {
        glu::Framebuffer framebuffer(gl);

        gl.bindFramebuffer(GL_FRAMEBUFFER, *framebuffer);
        GLU_EXPECT_NO_ERROR(gl.getError(), "Failed to create and bind framebuffer.");

        gl.bindRenderbuffer(GL_RENDERBUFFER, name);
        gl.framebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, name);
        GLU_EXPECT_NO_ERROR(gl.getError(), "Failed to bind and attach renderbuffer to framebuffer.");

        if (verify)
            glu::readPixels(renderContext, 0, 0, renderbuffer.getAccess());

        gl.bindRenderbuffer(GL_RENDERBUFFER, 0);
        gl.bindFramebuffer(GL_FRAMEBUFFER, 0);
        GLU_EXPECT_NO_ERROR(gl.getError(), "Failed to unbind renderbuffer and framebuffer.");
    }

    if (verify == VERIFY_COMPARE_REFERENCE)
    {
        if (isFloatFormat(info.getFormat()))
        {
            const tcu::UVec4 threshold(2, 2, 2, 2);

            if (!(tcu::floatUlpThresholdCompare(log, "Image comparison", "Image comparison", refRenderbuffer,
                                                renderbuffer.getAccess(), threshold, tcu::COMPARE_LOG_ON_ERROR)))
                results.fail("Image comparison failed.");
            else
                log << TestLog::Message << "Image comarison passed." << TestLog::EndMessage;
        }
        else if (isIntFormat(info.getFormat()) || isUintFormat(info.getFormat()))
        {
            const tcu::UVec4 threshold(1, 1, 1, 1);

            if (!(tcu::intThresholdCompare(log, "Image comparison", "Image comparison", refRenderbuffer,
                                           renderbuffer.getAccess(), threshold, tcu::COMPARE_LOG_ON_ERROR)))
                results.fail("Image comparison failed.");
            else
                log << TestLog::Message << "Image comarison passed." << TestLog::EndMessage;
        }
        else
        {
            const Vec4 threshold = calculateThreshold(format, readPixelsFormat);

            if (!(tcu::floatThresholdCompare(log, "Image comparison", "Image comparison", refRenderbuffer,
                                             renderbuffer.getAccess(), threshold, tcu::COMPARE_LOG_ON_ERROR)))
                results.fail("Image comparison failed.");
            else
                log << TestLog::Message << "Image comarison passed." << TestLog::EndMessage;
        }
    }
}

void render(tcu::TestContext &testContext, glu::RenderContext &renderContext, TextureRenderer &textureRenderer,
            tcu::ResultCollector &results, de::Random &rng, uint32_t name, const vector<ArrayBuffer<uint8_t>> &data,
            const ImageInfo &info, Verify verify)
{
    switch (info.getTarget())
    {
    case GL_TEXTURE_2D:
        renderTexture2D(testContext, renderContext, textureRenderer, results, rng, name, data, info, verify);
        break;

    case GL_TEXTURE_3D:
        renderTexture3D(testContext, renderContext, textureRenderer, results, rng, name, data, info, verify);
        break;

    case GL_TEXTURE_CUBE_MAP:
        renderTextureCubemap(testContext, renderContext, textureRenderer, results, rng, name, data, info, verify);
        break;

    case GL_TEXTURE_2D_ARRAY:
        renderTexture2DArray(testContext, renderContext, textureRenderer, results, rng, name, data, info, verify);
        break;

    case GL_RENDERBUFFER:
        renderRenderbuffer(testContext, renderContext, results, name, data, info, verify);
        break;

    default:
        DE_ASSERT(false);
    }
}

void logTestImageInfo(TestLog &log, const ImageInfo &imageInfo)
{
    log << TestLog::Message << "Target: " << targetToName(imageInfo.getTarget()) << TestLog::EndMessage;
    log << TestLog::Message << "Size: " << imageInfo.getSize() << TestLog::EndMessage;
    log << TestLog::Message << "Levels: " << getLevelCount(imageInfo) << TestLog::EndMessage;
    log << TestLog::Message << "Format: " << formatToName(imageInfo.getFormat()) << TestLog::EndMessage;
}

void logTestInfo(TestLog &log, const ImageInfo &srcImageInfo, const ImageInfo &dstImageInfo)
{
    tcu::ScopedLogSection section(log, "TestCaseInfo", "Test case info");

    log << TestLog::Message << "Testing copying from " << targetToName(srcImageInfo.getTarget()) << " to "
        << targetToName(dstImageInfo.getTarget()) << "." << TestLog::EndMessage;

    {
        tcu::ScopedLogSection srcSection(log, "Source image info.", "Source image info.");
        logTestImageInfo(log, srcImageInfo);
    }

    {
        tcu::ScopedLogSection dstSection(log, "Destination image info.", "Destination image info.");
        logTestImageInfo(log, dstImageInfo);
    }
}

class CopyImageTest : public TestCase
{
public:
    CopyImageTest(Context &context, const ImageInfo &srcImage, const ImageInfo &dstImage, const char *name,
                  const char *description);

    ~CopyImageTest(void);

    void init(void);
    void deinit(void);

    TestCase::IterateResult iterate(void);

private:
    void logTestInfoIter(void);
    void createImagesIter(void);
    void destroyImagesIter(void);
    void verifySourceIter(void);
    void verifyDestinationIter(void);
    void renderSourceIter(void);
    void renderDestinationIter(void);
    void copyImageIter(void);

    typedef void (CopyImageTest::*IterationFunc)(void);

    struct Iteration
    {
        Iteration(int methodCount_, const IterationFunc *methods_) : methodCount(methodCount_), methods(methods_)
        {
        }

        int methodCount;
        const IterationFunc *methods;
    };

    struct State
    {
        State(int seed, tcu::TestLog &log, glu::RenderContext &renderContext)
            : rng(seed)
            , results(log)
            , srcImage(NULL)
            , dstImage(NULL)
            , textureRenderer(renderContext, log, glu::getContextTypeGLSLVersion(renderContext.getType()),
                              glu::PRECISION_HIGHP)
        {
        }

        ~State(void)
        {
            delete srcImage;
            delete dstImage;
        }

        de::Random rng;
        tcu::ResultCollector results;
        glu::ObjectWrapper *srcImage;
        glu::ObjectWrapper *dstImage;
        TextureRenderer textureRenderer;

        vector<ArrayBuffer<uint8_t>> srcImageLevels;
        vector<ArrayBuffer<uint8_t>> dstImageLevels;
    };

    const ImageInfo m_srcImageInfo;
    const ImageInfo m_dstImageInfo;

    int m_iteration;
    State *m_state;
};

CopyImageTest::CopyImageTest(Context &context, const ImageInfo &srcImage, const ImageInfo &dstImage, const char *name,
                             const char *description)
    : TestCase(context, name, description)
    , m_srcImageInfo(srcImage)
    , m_dstImageInfo(dstImage)

    , m_iteration(0)
    , m_state(NULL)
{
}

CopyImageTest::~CopyImageTest(void)
{
    deinit();
}

void checkFormatSupport(glu::ContextInfo &info, uint32_t format, uint32_t target, glu::RenderContext &ctx)
{
    const bool isES32 = glu::contextSupports(ctx.getType(), glu::ApiType::es(3, 2));

    if (glu::isCompressedFormat(format))
    {
        if (isAstcFormat(glu::mapGLCompressedTexFormat(format)))
        {
            DE_ASSERT(target != GL_RENDERBUFFER);
            if (!info.isExtensionSupported("GL_KHR_texture_compression_astc_sliced_3d") &&
                !info.isExtensionSupported("GL_KHR_texture_compression_astc_hdr") &&
                !info.isExtensionSupported("GL_OES_texture_compression_astc"))
            {
                if (target == GL_TEXTURE_3D)
                    TCU_THROW(NotSupportedError, "TEXTURE_3D target not supported.");
                if (!isES32 && !info.isExtensionSupported("GL_KHR_texture_compression_astc_ldr"))
                    TCU_THROW(NotSupportedError, "Compressed astc texture not supported.");
            }
        }
        else
        {
            if (!info.isCompressedTextureFormatSupported(format))
                TCU_THROW(NotSupportedError, "Compressed texture not supported.");
        }
    }
}

void CopyImageTest::init(void)
{
    auto &rc = m_context.getRenderContext();
    de::UniquePtr<glu::ContextInfo> ctxInfo(glu::ContextInfo::create(rc));
    const bool isES32orGL45 = glu::contextSupports(rc.getType(), glu::ApiType::es(3, 2)) ||
                              glu::contextSupports(rc.getType(), glu::ApiType::core(4, 5));

    if (!isES32orGL45 && !ctxInfo->isExtensionSupported("GL_EXT_copy_image"))
        throw tcu::NotSupportedError("Extension GL_EXT_copy_image not supported.", "", __FILE__, __LINE__);

    checkFormatSupport(*ctxInfo, m_srcImageInfo.getFormat(), m_srcImageInfo.getTarget(), rc);
    checkFormatSupport(*ctxInfo, m_dstImageInfo.getFormat(), m_dstImageInfo.getTarget(), rc);

    {
        SeedBuilder builder;

        builder << 903980 << m_srcImageInfo << m_dstImageInfo;

        m_state = new State(builder.get(), m_testCtx.getLog(), rc);
    }
}

void CopyImageTest::deinit(void)
{
    delete m_state;
    m_state = NULL;
}

void CopyImageTest::logTestInfoIter(void)
{
    TestLog &log = m_testCtx.getLog();

    logTestInfo(log, m_srcImageInfo, m_dstImageInfo);
}

void CopyImageTest::createImagesIter(void)
{
    TestLog &log                      = m_testCtx.getLog();
    glu::RenderContext &renderContext = m_context.getRenderContext();
    const glw::Functions &gl          = renderContext.getFunctions();
    const uint32_t moreRestrictiveFormat =
        getMoreRestrictiveFormat(m_srcImageInfo.getFormat(), m_dstImageInfo.getFormat());
    de::Random &rng = m_state->rng;

    DE_ASSERT(!m_state->srcImage);
    DE_ASSERT(!m_state->dstImage);

    m_state->srcImage = new glu::ObjectWrapper(gl, getObjectTraits(m_srcImageInfo));
    m_state->dstImage = new glu::ObjectWrapper(gl, getObjectTraits(m_dstImageInfo));

    {
        glu::ObjectWrapper &srcImage = *m_state->srcImage;
        glu::ObjectWrapper &dstImage = *m_state->dstImage;

        vector<ArrayBuffer<uint8_t>> &srcImageLevels = m_state->srcImageLevels;
        vector<ArrayBuffer<uint8_t>> &dstImageLevels = m_state->dstImageLevels;

        log << TestLog::Message << "Creating source image." << TestLog::EndMessage;
        genImage(gl, rng, *srcImage, srcImageLevels, m_srcImageInfo, moreRestrictiveFormat);

        log << TestLog::Message << "Creating destination image." << TestLog::EndMessage;
        genImage(gl, rng, *dstImage, dstImageLevels, m_dstImageInfo, moreRestrictiveFormat);
    }
}

void CopyImageTest::destroyImagesIter(void)
{
    TestLog &log = m_testCtx.getLog();

    log << TestLog::Message << "Deleting source image. " << TestLog::EndMessage;

    delete m_state->srcImage;
    m_state->srcImage = NULL;
    m_state->srcImageLevels.clear();

    log << TestLog::Message << "Deleting destination image. " << TestLog::EndMessage;

    delete m_state->dstImage;
    m_state->dstImage = NULL;
    m_state->dstImageLevels.clear();
}

void CopyImageTest::verifySourceIter(void)
{
    TestLog &log = m_testCtx.getLog();
    const tcu::ScopedLogSection sourceSection(log, "Source image verify.", "Source image verify.");

    de::Random &rng                              = m_state->rng;
    tcu::ResultCollector &results                = m_state->results;
    glu::ObjectWrapper &srcImage                 = *m_state->srcImage;
    vector<ArrayBuffer<uint8_t>> &srcImageLevels = m_state->srcImageLevels;

    log << TestLog::Message << "Verifying source image." << TestLog::EndMessage;

    render(m_testCtx, m_context.getRenderContext(), m_state->textureRenderer, results, rng, *srcImage, srcImageLevels,
           m_srcImageInfo, VERIFY_COMPARE_REFERENCE);
}

void CopyImageTest::verifyDestinationIter(void)
{
    TestLog &log = m_testCtx.getLog();
    const tcu::ScopedLogSection destinationSection(log, "Destination image verify.", "Destination image verify.");

    de::Random &rng                              = m_state->rng;
    tcu::ResultCollector &results                = m_state->results;
    glu::ObjectWrapper &dstImage                 = *m_state->dstImage;
    vector<ArrayBuffer<uint8_t>> &dstImageLevels = m_state->dstImageLevels;

    log << TestLog::Message << "Verifying destination image." << TestLog::EndMessage;

    render(m_testCtx, m_context.getRenderContext(), m_state->textureRenderer, results, rng, *dstImage, dstImageLevels,
           m_dstImageInfo, VERIFY_COMPARE_REFERENCE);
}

void CopyImageTest::renderSourceIter(void)
{
    TestLog &log = m_testCtx.getLog();
    const tcu::ScopedLogSection sourceSection(log, "Source image verify.", "Source image verify.");

    de::Random &rng                              = m_state->rng;
    tcu::ResultCollector &results                = m_state->results;
    glu::ObjectWrapper &srcImage                 = *m_state->srcImage;
    vector<ArrayBuffer<uint8_t>> &srcImageLevels = m_state->srcImageLevels;

    log << TestLog::Message << "Verifying source image." << TestLog::EndMessage;

    render(m_testCtx, m_context.getRenderContext(), m_state->textureRenderer, results, rng, *srcImage, srcImageLevels,
           m_srcImageInfo, VERIFY_NONE);
}

void CopyImageTest::renderDestinationIter(void)
{
    TestLog &log = m_testCtx.getLog();
    const tcu::ScopedLogSection destinationSection(log, "Destination image verify.", "Destination image verify.");

    de::Random &rng                              = m_state->rng;
    tcu::ResultCollector &results                = m_state->results;
    glu::ObjectWrapper &dstImage                 = *m_state->dstImage;
    vector<ArrayBuffer<uint8_t>> &dstImageLevels = m_state->dstImageLevels;

    log << TestLog::Message << "Verifying destination image." << TestLog::EndMessage;

    render(m_testCtx, m_context.getRenderContext(), m_state->textureRenderer, results, rng, *dstImage, dstImageLevels,
           m_dstImageInfo, VERIFY_NONE);
}

struct Copy
{
    Copy(const IVec3 &srcPos_, int srcLevel_,

         const IVec3 &dstPos_, int dstLevel_,

         const IVec3 &size_, const IVec3 &dstSize_)
        : srcPos(srcPos_)
        , srcLevel(srcLevel_)

        , dstPos(dstPos_)
        , dstLevel(dstLevel_)

        , size(size_)
        , dstSize(dstSize_)
    {
    }

    IVec3 srcPos;
    int srcLevel;
    IVec3 dstPos;
    int dstLevel;
    IVec3 size;
    IVec3 dstSize; //!< used only for logging
};

int getLastFullLevel(const ImageInfo &info)
{
    const int levelCount       = getLevelCount(info);
    const IVec3 blockPixelSize = getTexelBlockPixelSize(info.getFormat());

    for (int level = 0; level < levelCount; level++)
    {
        const IVec3 levelSize = getLevelSize(info.getTarget(), info.getSize(), level);

        if (levelSize.x() < blockPixelSize.x() || levelSize.y() < blockPixelSize.y() ||
            levelSize.z() < blockPixelSize.z())
            return level - 1;
    }

    return levelCount - 1;
}

void generateCopies(vector<Copy> &copies, const ImageInfo &srcInfo, const ImageInfo &dstInfo)
{
    const uint32_t srcTarget = srcInfo.getTarget();
    const uint32_t dstTarget = dstInfo.getTarget();

    const bool srcIsTexture = isTextureTarget(srcInfo.getTarget());
    const bool dstIsTexture = isTextureTarget(dstInfo.getTarget());

    const bool srcIsCube = srcTarget == GL_TEXTURE_CUBE_MAP;
    const bool dstIsCube = dstTarget == GL_TEXTURE_CUBE_MAP;

    const IVec3 srcBlockPixelSize = getTexelBlockPixelSize(srcInfo.getFormat());
    const IVec3 dstBlockPixelSize = getTexelBlockPixelSize(dstInfo.getFormat());

    const int levels[] = {0, 1, -1};

    for (int levelNdx = 0; levelNdx < (srcIsTexture || dstIsTexture ? DE_LENGTH_OF_ARRAY(levels) : 1); levelNdx++)
    {
        const int srcLevel =
            (srcIsTexture ? (levels[levelNdx] >= 0 ? levels[levelNdx] : getLastFullLevel(srcInfo)) : 0);
        const int dstLevel =
            (dstIsTexture ? (levels[levelNdx] >= 0 ? levels[levelNdx] : getLastFullLevel(dstInfo)) : 0);

        const IVec3 srcSize = getLevelSize(srcInfo.getTarget(), srcInfo.getSize(), srcLevel);
        const IVec3 dstSize = getLevelSize(dstInfo.getTarget(), dstInfo.getSize(), dstLevel);

        // \note These are rounded down
        const IVec3 srcCompleteBlockSize =
            IVec3(srcSize.x() / srcBlockPixelSize.x(), srcSize.y() / srcBlockPixelSize.y(),
                  (srcIsCube ? 6 : srcSize.z() / srcBlockPixelSize.z()));
        const IVec3 dstCompleteBlockSize =
            IVec3(dstSize.x() / dstBlockPixelSize.x(), dstSize.y() / dstBlockPixelSize.y(),
                  (dstIsCube ? 6 : dstSize.z() / dstBlockPixelSize.z()));

        const IVec3 maxCopyBlockSize = tcu::min(srcCompleteBlockSize, dstCompleteBlockSize);

        // \note These are rounded down
        const int copyBlockWidth  = de::max((2 * (maxCopyBlockSize.x() / 4)) - 1, 1);
        const int copyBlockHeight = de::max((2 * (maxCopyBlockSize.y() / 4)) - 1, 1);
        const int copyBlockDepth  = de::max((2 * (maxCopyBlockSize.z() / 4)) - 1, 1);

        // Copy NPOT block to (0,0,0) from other corner on src
        {
            const IVec3 copyBlockSize(copyBlockWidth, copyBlockHeight, copyBlockDepth);
            const IVec3 srcBlockPos(srcCompleteBlockSize - copyBlockSize);
            const IVec3 dstBlockPos(0, 0, 0);

            const IVec3 srcPos(srcBlockPos * srcBlockPixelSize);
            const IVec3 dstPos(dstBlockPos * dstBlockPixelSize);
            const IVec3 srcCopySize(copyBlockSize * srcBlockPixelSize);
            const IVec3 dstCopySize(copyBlockSize * dstBlockPixelSize);

            copies.push_back(Copy(srcPos, srcLevel, dstPos, dstLevel, srcCopySize, dstCopySize));
        }

        // Copy NPOT block from (0,0,0) to other corner on dst
        {
            const IVec3 copyBlockSize(copyBlockWidth, copyBlockHeight, copyBlockDepth);
            const IVec3 srcBlockPos(0, 0, 0);
            const IVec3 dstBlockPos(dstCompleteBlockSize - copyBlockSize);

            const IVec3 srcPos(srcBlockPos * srcBlockPixelSize);
            const IVec3 dstPos(dstBlockPos * dstBlockPixelSize);
            const IVec3 srcCopySize(copyBlockSize * srcBlockPixelSize);
            const IVec3 dstCopySize(copyBlockSize * dstBlockPixelSize);

            copies.push_back(Copy(srcPos, srcLevel, dstPos, dstLevel, srcCopySize, dstCopySize));
        }

        // Copy NPOT block near the corner with high coordinates
        {
            const IVec3 copyBlockSize(copyBlockWidth, copyBlockHeight, copyBlockDepth);
            const IVec3 srcBlockPos(tcu::max((srcCompleteBlockSize / 4) * 4 - copyBlockSize, IVec3(0)));
            const IVec3 dstBlockPos(tcu::max((dstCompleteBlockSize / 4) * 4 - copyBlockSize, IVec3(0)));

            const IVec3 srcPos(srcBlockPos * srcBlockPixelSize);
            const IVec3 dstPos(dstBlockPos * dstBlockPixelSize);
            const IVec3 srcCopySize(copyBlockSize * srcBlockPixelSize);
            const IVec3 dstCopySize(copyBlockSize * dstBlockPixelSize);

            copies.push_back(Copy(srcPos, srcLevel, dstPos, dstLevel, srcCopySize, dstCopySize));
        }
    }
}

void CopyImageTest::copyImageIter(void)
{
    TestLog &log                 = m_testCtx.getLog();
    const glw::Functions &gl     = m_context.getRenderContext().getFunctions();
    glu::ObjectWrapper &srcImage = *m_state->srcImage;
    glu::ObjectWrapper &dstImage = *m_state->dstImage;

    vector<ArrayBuffer<uint8_t>> &srcImageLevels = m_state->srcImageLevels;
    vector<ArrayBuffer<uint8_t>> &dstImageLevels = m_state->dstImageLevels;
    vector<Copy> copies;

    generateCopies(copies, m_srcImageInfo, m_dstImageInfo);

    for (int copyNdx = 0; copyNdx < (int)copies.size(); copyNdx++)
    {
        const Copy &copy = copies[copyNdx];

        log << TestLog::Message << "Copying area with size " << copy.size << " from source image position "
            << copy.srcPos << " and mipmap level " << copy.srcLevel << " to destination image position " << copy.dstPos
            << " and mipmap level " << copy.dstLevel << ". "
            << "Size in destination format is " << copy.dstSize << TestLog::EndMessage;

        copyImage(gl, *dstImage, dstImageLevels, m_dstImageInfo, copy.dstLevel, copy.dstPos, *srcImage, srcImageLevels,
                  m_srcImageInfo, copy.srcLevel, copy.srcPos, copy.size);
    }
}

TestCase::IterateResult CopyImageTest::iterate(void)
{
    // Note: Returning from iterate() has two side-effects: it touches
    // watchdog and calls eglSwapBuffers. For the first it's important
    // to keep work per iteration reasonable to avoid
    // timeouts. Because of the latter, it's prudent to do more than
    // trivial amount of work. Otherwise we'll end up waiting for a
    // new buffer in swap, it seems.

    // The split below tries to combine trivial work with actually
    // expensive rendering iterations without having too much
    // rendering in one iteration to avoid timeouts.
    const IterationFunc iteration1[] = {&CopyImageTest::logTestInfoIter, &CopyImageTest::createImagesIter,
                                        &CopyImageTest::renderSourceIter};
    const IterationFunc iteration2[] = {&CopyImageTest::renderDestinationIter};
    const IterationFunc iteration3[] = {&CopyImageTest::copyImageIter, &CopyImageTest::verifySourceIter};
    const IterationFunc iteration4[] = {&CopyImageTest::verifyDestinationIter, &CopyImageTest::destroyImagesIter};
    const IterationFunc iteration5[] = {&CopyImageTest::createImagesIter, &CopyImageTest::copyImageIter,
                                        &CopyImageTest::verifySourceIter};
    const IterationFunc iteration6[] = {&CopyImageTest::verifyDestinationIter, &CopyImageTest::destroyImagesIter};
    const Iteration iterations[]     = {
        Iteration(DE_LENGTH_OF_ARRAY(iteration1), iteration1), Iteration(DE_LENGTH_OF_ARRAY(iteration2), iteration2),
        Iteration(DE_LENGTH_OF_ARRAY(iteration3), iteration3), Iteration(DE_LENGTH_OF_ARRAY(iteration4), iteration4),
        Iteration(DE_LENGTH_OF_ARRAY(iteration5), iteration5), Iteration(DE_LENGTH_OF_ARRAY(iteration6), iteration6)};

    DE_ASSERT(m_iteration < DE_LENGTH_OF_ARRAY(iterations));
    for (int method = 0; method < iterations[m_iteration].methodCount; method++)
        (this->*iterations[m_iteration].methods[method])();

    m_iteration++;

    if (m_iteration < DE_LENGTH_OF_ARRAY(iterations))
    {
        return CONTINUE;
    }
    else
    {
        m_state->results.setTestContextResult(m_testCtx);
        return STOP;
    }
}

class CopyImageTests : public TestCaseGroup
{
public:
    CopyImageTests(Context &context, bool is_GL45);
    ~CopyImageTests(void);

    void init(void);

private:
    CopyImageTests(const CopyImageTests &other);
    CopyImageTests &operator=(const CopyImageTests &other);
    bool m_isGL45;
};

CopyImageTests::CopyImageTests(Context &context, bool is_GL45)
    : TestCaseGroup(context, "copy_image", "Copy image tests for GL_EXT_copy_image.")
    , m_isGL45(is_GL45)
{
}

CopyImageTests::~CopyImageTests(void)
{
}

int smallestCommonMultiple(int a_, int b_)
{
    int a      = (a_ > b_ ? a_ : b_);
    int b      = (a_ > b_ ? b_ : a_);
    int result = 1;

    for (int i = b / 2; i > 1; i--)
    {
        while ((a % i) == 0 && (b % i) == 0)
        {
            result *= i;
            a /= i;
            b /= i;
        }
    }

    return result * a * b;
}

IVec3 getTestedSize(uint32_t target, uint32_t format, const IVec3 &targetSize)
{
    const IVec3 texelBlockPixelSize = getTexelBlockPixelSize(format);
    const bool isCube               = target == GL_TEXTURE_CUBE_MAP;
    const bool is3D                 = target == GL_TEXTURE_3D || target == GL_TEXTURE_2D_ARRAY;

    if (isCube)
    {
        const int multiplier = smallestCommonMultiple(texelBlockPixelSize.x(), texelBlockPixelSize.y());
        const int size       = (1 + (targetSize.x() / multiplier)) * multiplier;

        return IVec3(size, size, 1);
    }
    else if (is3D)
    {
        return (1 + (targetSize / texelBlockPixelSize)) * texelBlockPixelSize;
    }
    else
    {
        const int width  = (1 + targetSize.x() / texelBlockPixelSize.x()) * texelBlockPixelSize.x();
        const int height = ((targetSize.y() / texelBlockPixelSize.y()) - 1) * texelBlockPixelSize.y();

        return IVec3(width, height, 1);
    }
}

void addCopyTests(TestCaseGroup *root, uint32_t srcFormat, uint32_t dstFormat)
{
    const string groupName     = string(formatToName(srcFormat)) + "_" + formatToName(dstFormat);
    TestCaseGroup *const group = new TestCaseGroup(root->getContext(), groupName.c_str(), groupName.c_str());

    const uint32_t targets[] = {GL_TEXTURE_2D, GL_TEXTURE_3D, GL_TEXTURE_CUBE_MAP, GL_TEXTURE_2D_ARRAY,
                                GL_RENDERBUFFER};

    root->addChild(group);

    for (int srcTargetNdx = 0; srcTargetNdx < DE_LENGTH_OF_ARRAY(targets); srcTargetNdx++)
    {
        const uint32_t srcTarget = targets[srcTargetNdx];
        const bool srcIs3D       = srcTarget == GL_TEXTURE_2D_ARRAY || srcTarget == GL_TEXTURE_3D;

        if (glu::isCompressedFormat(srcFormat) && srcTarget == GL_RENDERBUFFER)
            continue;

        if (srcTarget == GL_RENDERBUFFER && !isColorRenderable(srcFormat))
            continue;

        if (glu::isCompressedFormat(srcFormat) && !tcu::isAstcFormat(glu::mapGLCompressedTexFormat(srcFormat)) &&
            srcIs3D)
            continue;

        for (int dstTargetNdx = 0; dstTargetNdx < DE_LENGTH_OF_ARRAY(targets); dstTargetNdx++)
        {
            const uint32_t dstTarget = targets[dstTargetNdx];
            const bool dstIs3D       = dstTarget == GL_TEXTURE_2D_ARRAY || dstTarget == GL_TEXTURE_3D;

            if (glu::isCompressedFormat(dstFormat) && dstTarget == GL_RENDERBUFFER)
                continue;

            if (dstTarget == GL_RENDERBUFFER && !isColorRenderable(dstFormat))
                continue;

            if (glu::isCompressedFormat(dstFormat) && !tcu::isAstcFormat(glu::mapGLCompressedTexFormat(dstFormat)) &&
                dstIs3D)
                continue;

            const string targetTestName = string(targetToName(srcTarget)) + "_to_" + targetToName(dstTarget);

            // Compressed formats require more space to fit all block size combinations.
            const bool isCompressedCase = glu::isCompressedFormat(srcFormat) || glu::isCompressedFormat(dstFormat);
            const IVec3 targetSize      = isCompressedCase ? IVec3(128, 128, 16) : IVec3(64, 64, 8);
            const IVec3 srcSize         = getTestedSize(srcTarget, srcFormat, targetSize);
            const IVec3 dstSize         = getTestedSize(dstTarget, dstFormat, targetSize);

            group->addChild(new CopyImageTest(root->getContext(), ImageInfo(srcFormat, srcTarget, srcSize),
                                              ImageInfo(dstFormat, dstTarget, dstSize), targetTestName.c_str(),
                                              targetTestName.c_str()));
        }
    }
}

void CopyImageTests::init(void)
{
    map<ViewClass, vector<uint32_t>> textureFormatViewClasses;
    map<ViewClass, vector<uint32_t>> compressedTextureFormatViewClasses;
    map<ViewClass, pair<vector<uint32_t>, vector<uint32_t>>> mixedViewClasses;

    // Texture view classes
    textureFormatViewClasses[VIEWCLASS_128_BITS] = vector<uint32_t>();
    textureFormatViewClasses[VIEWCLASS_96_BITS]  = vector<uint32_t>();
    textureFormatViewClasses[VIEWCLASS_64_BITS]  = vector<uint32_t>();
    textureFormatViewClasses[VIEWCLASS_48_BITS]  = vector<uint32_t>();
    textureFormatViewClasses[VIEWCLASS_32_BITS]  = vector<uint32_t>();
    textureFormatViewClasses[VIEWCLASS_24_BITS]  = vector<uint32_t>();
    textureFormatViewClasses[VIEWCLASS_16_BITS]  = vector<uint32_t>();
    textureFormatViewClasses[VIEWCLASS_8_BITS]   = vector<uint32_t>();

    // 128bit / VIEWCLASS_128_BITS
    textureFormatViewClasses[VIEWCLASS_128_BITS].push_back(GL_RGBA32F);
    textureFormatViewClasses[VIEWCLASS_128_BITS].push_back(GL_RGBA32I);
    textureFormatViewClasses[VIEWCLASS_128_BITS].push_back(GL_RGBA32UI);

    // 96bit / VIEWCLASS_96_BITS
    textureFormatViewClasses[VIEWCLASS_96_BITS].push_back(GL_RGB32F);
    textureFormatViewClasses[VIEWCLASS_96_BITS].push_back(GL_RGB32I);
    textureFormatViewClasses[VIEWCLASS_96_BITS].push_back(GL_RGB32UI);

    // 64bit / VIEWCLASS_64_BITS
    textureFormatViewClasses[VIEWCLASS_64_BITS].push_back(GL_RG32F);
    textureFormatViewClasses[VIEWCLASS_64_BITS].push_back(GL_RG32I);
    textureFormatViewClasses[VIEWCLASS_64_BITS].push_back(GL_RG32UI);

    textureFormatViewClasses[VIEWCLASS_64_BITS].push_back(GL_RGBA16F);
    textureFormatViewClasses[VIEWCLASS_64_BITS].push_back(GL_RGBA16I);
    textureFormatViewClasses[VIEWCLASS_64_BITS].push_back(GL_RGBA16UI);

    // 48bit / VIEWCLASS_48_BITS
    textureFormatViewClasses[VIEWCLASS_48_BITS].push_back(GL_RGB16F);
    textureFormatViewClasses[VIEWCLASS_48_BITS].push_back(GL_RGB16I);
    textureFormatViewClasses[VIEWCLASS_48_BITS].push_back(GL_RGB16UI);

    // 32bit / VIEWCLASS_32_BITS
    textureFormatViewClasses[VIEWCLASS_32_BITS].push_back(GL_R32F);
    textureFormatViewClasses[VIEWCLASS_32_BITS].push_back(GL_R32I);
    textureFormatViewClasses[VIEWCLASS_32_BITS].push_back(GL_R32UI);

    textureFormatViewClasses[VIEWCLASS_32_BITS].push_back(GL_RG16F);
    textureFormatViewClasses[VIEWCLASS_32_BITS].push_back(GL_RG16I);
    textureFormatViewClasses[VIEWCLASS_32_BITS].push_back(GL_RG16UI);

    textureFormatViewClasses[VIEWCLASS_32_BITS].push_back(GL_RGBA8);
    textureFormatViewClasses[VIEWCLASS_32_BITS].push_back(GL_RGBA8I);
    textureFormatViewClasses[VIEWCLASS_32_BITS].push_back(GL_RGBA8UI);

    textureFormatViewClasses[VIEWCLASS_32_BITS].push_back(GL_R11F_G11F_B10F);
    textureFormatViewClasses[VIEWCLASS_32_BITS].push_back(GL_RGB10_A2UI);
    textureFormatViewClasses[VIEWCLASS_32_BITS].push_back(GL_RGB10_A2);
    textureFormatViewClasses[VIEWCLASS_32_BITS].push_back(GL_RGBA8_SNORM);
    textureFormatViewClasses[VIEWCLASS_32_BITS].push_back(GL_SRGB8_ALPHA8);
    textureFormatViewClasses[VIEWCLASS_32_BITS].push_back(GL_RGB9_E5);

    // 24bit / VIEWCLASS_24_BITS
    textureFormatViewClasses[VIEWCLASS_24_BITS].push_back(GL_RGB8);
    textureFormatViewClasses[VIEWCLASS_24_BITS].push_back(GL_RGB8I);
    textureFormatViewClasses[VIEWCLASS_24_BITS].push_back(GL_RGB8UI);
    textureFormatViewClasses[VIEWCLASS_24_BITS].push_back(GL_RGB8_SNORM);
    textureFormatViewClasses[VIEWCLASS_24_BITS].push_back(GL_SRGB8);

    // 16bit / VIEWCLASS_16_BITS
    textureFormatViewClasses[VIEWCLASS_16_BITS].push_back(GL_R16F);
    textureFormatViewClasses[VIEWCLASS_16_BITS].push_back(GL_R16I);
    textureFormatViewClasses[VIEWCLASS_16_BITS].push_back(GL_R16UI);

    textureFormatViewClasses[VIEWCLASS_16_BITS].push_back(GL_RG8);
    textureFormatViewClasses[VIEWCLASS_16_BITS].push_back(GL_RG8I);
    textureFormatViewClasses[VIEWCLASS_16_BITS].push_back(GL_RG8UI);
    textureFormatViewClasses[VIEWCLASS_16_BITS].push_back(GL_RG8_SNORM);

    // 8bit / VIEWCLASS_8_BITS
    textureFormatViewClasses[VIEWCLASS_8_BITS].push_back(GL_R8);
    textureFormatViewClasses[VIEWCLASS_8_BITS].push_back(GL_R8I);
    textureFormatViewClasses[VIEWCLASS_8_BITS].push_back(GL_R8UI);
    textureFormatViewClasses[VIEWCLASS_8_BITS].push_back(GL_R8_SNORM);

    // Compressed texture view classes
    compressedTextureFormatViewClasses[VIEWCLASS_EAC_R11]         = vector<uint32_t>();
    compressedTextureFormatViewClasses[VIEWCLASS_EAC_RG11]        = vector<uint32_t>();
    compressedTextureFormatViewClasses[VIEWCLASS_ETC2_RGB]        = vector<uint32_t>();
    compressedTextureFormatViewClasses[VIEWCLASS_ETC2_RGBA]       = vector<uint32_t>();
    compressedTextureFormatViewClasses[VIEWCLASS_ETC2_EAC_RGBA]   = vector<uint32_t>();
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_4x4_RGBA]   = vector<uint32_t>();
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_5x4_RGBA]   = vector<uint32_t>();
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_5x5_RGBA]   = vector<uint32_t>();
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_6x5_RGBA]   = vector<uint32_t>();
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_6x6_RGBA]   = vector<uint32_t>();
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_8x5_RGBA]   = vector<uint32_t>();
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_8x6_RGBA]   = vector<uint32_t>();
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_8x8_RGBA]   = vector<uint32_t>();
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_10x5_RGBA]  = vector<uint32_t>();
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_10x6_RGBA]  = vector<uint32_t>();
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_10x8_RGBA]  = vector<uint32_t>();
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_10x10_RGBA] = vector<uint32_t>();
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_12x10_RGBA] = vector<uint32_t>();
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_12x12_RGBA] = vector<uint32_t>();

    // VIEWCLASS_EAC_R11
    compressedTextureFormatViewClasses[VIEWCLASS_EAC_R11].push_back(GL_COMPRESSED_R11_EAC);
    compressedTextureFormatViewClasses[VIEWCLASS_EAC_R11].push_back(GL_COMPRESSED_SIGNED_R11_EAC);

    // VIEWCLASS_EAC_RG11
    compressedTextureFormatViewClasses[VIEWCLASS_EAC_RG11].push_back(GL_COMPRESSED_RG11_EAC);
    compressedTextureFormatViewClasses[VIEWCLASS_EAC_RG11].push_back(GL_COMPRESSED_SIGNED_RG11_EAC);

    // VIEWCLASS_ETC2_RGB
    compressedTextureFormatViewClasses[VIEWCLASS_ETC2_RGB].push_back(GL_COMPRESSED_RGB8_ETC2);
    compressedTextureFormatViewClasses[VIEWCLASS_ETC2_RGB].push_back(GL_COMPRESSED_SRGB8_ETC2);

    // VIEWCLASS_ETC2_RGBA
    compressedTextureFormatViewClasses[VIEWCLASS_ETC2_RGBA].push_back(GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2);
    compressedTextureFormatViewClasses[VIEWCLASS_ETC2_RGBA].push_back(GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2);

    // VIEWCLASS_ETC2_EAC_RGBA
    compressedTextureFormatViewClasses[VIEWCLASS_ETC2_EAC_RGBA].push_back(GL_COMPRESSED_RGBA8_ETC2_EAC);
    compressedTextureFormatViewClasses[VIEWCLASS_ETC2_EAC_RGBA].push_back(GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC);

    // VIEWCLASS_ASTC_4x4_RGBA
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_4x4_RGBA].push_back(GL_COMPRESSED_RGBA_ASTC_4x4);
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_4x4_RGBA].push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4);

    // VIEWCLASS_ASTC_5x4_RGBA
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_5x4_RGBA].push_back(GL_COMPRESSED_RGBA_ASTC_5x4);
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_5x4_RGBA].push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4);

    // VIEWCLASS_ASTC_5x5_RGBA
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_5x5_RGBA].push_back(GL_COMPRESSED_RGBA_ASTC_5x5);
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_5x5_RGBA].push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5);

    // VIEWCLASS_ASTC_6x5_RGBA
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_6x5_RGBA].push_back(GL_COMPRESSED_RGBA_ASTC_6x5);
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_6x5_RGBA].push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5);

    // VIEWCLASS_ASTC_6x6_RGBA
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_6x6_RGBA].push_back(GL_COMPRESSED_RGBA_ASTC_6x6);
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_6x6_RGBA].push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6);

    // VIEWCLASS_ASTC_8x5_RGBA
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_8x5_RGBA].push_back(GL_COMPRESSED_RGBA_ASTC_8x5);
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_8x5_RGBA].push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5);

    // VIEWCLASS_ASTC_8x6_RGBA
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_8x6_RGBA].push_back(GL_COMPRESSED_RGBA_ASTC_8x6);
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_8x6_RGBA].push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6);

    // VIEWCLASS_ASTC_8x8_RGBA
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_8x8_RGBA].push_back(GL_COMPRESSED_RGBA_ASTC_8x8);
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_8x8_RGBA].push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8);

    // VIEWCLASS_ASTC_10x5_RGBA
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_10x5_RGBA].push_back(GL_COMPRESSED_RGBA_ASTC_10x5);
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_10x5_RGBA].push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5);

    // VIEWCLASS_ASTC_10x6_RGBA
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_10x6_RGBA].push_back(GL_COMPRESSED_RGBA_ASTC_10x6);
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_10x6_RGBA].push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6);

    // VIEWCLASS_ASTC_10x8_RGBA
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_10x8_RGBA].push_back(GL_COMPRESSED_RGBA_ASTC_10x8);
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_10x8_RGBA].push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8);

    // VIEWCLASS_ASTC_10x10_RGBA
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_10x10_RGBA].push_back(GL_COMPRESSED_RGBA_ASTC_10x10);
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_10x10_RGBA].push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10);

    // VIEWCLASS_ASTC_12x10_RGBA
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_12x10_RGBA].push_back(GL_COMPRESSED_RGBA_ASTC_12x10);
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_12x10_RGBA].push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10);

    // VIEWCLASS_ASTC_12x12_RGBA
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_12x12_RGBA].push_back(GL_COMPRESSED_RGBA_ASTC_12x12);
    compressedTextureFormatViewClasses[VIEWCLASS_ASTC_12x12_RGBA].push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12);

    // Mixed view classes
    mixedViewClasses[VIEWCLASS_128_BITS] = pair<vector<uint32_t>, vector<uint32_t>>();
    mixedViewClasses[VIEWCLASS_64_BITS]  = pair<vector<uint32_t>, vector<uint32_t>>();

    // 128 bits

    // Non compressed
    mixedViewClasses[VIEWCLASS_128_BITS].first.push_back(GL_RGBA32F);
    mixedViewClasses[VIEWCLASS_128_BITS].first.push_back(GL_RGBA32UI);
    mixedViewClasses[VIEWCLASS_128_BITS].first.push_back(GL_RGBA32I);

    // Compressed
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_RGBA8_ETC2_EAC);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_RG11_EAC);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_SIGNED_RG11_EAC);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_RGBA_ASTC_4x4);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_RGBA_ASTC_5x4);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_RGBA_ASTC_5x5);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_RGBA_ASTC_6x5);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_RGBA_ASTC_6x6);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_RGBA_ASTC_8x5);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_RGBA_ASTC_8x6);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_RGBA_ASTC_8x8);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_RGBA_ASTC_10x5);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_RGBA_ASTC_10x6);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_RGBA_ASTC_10x8);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_RGBA_ASTC_10x10);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_RGBA_ASTC_12x10);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_RGBA_ASTC_12x12);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10);
    mixedViewClasses[VIEWCLASS_128_BITS].second.push_back(GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12);

    // 64 bits

    // Non compressed
    mixedViewClasses[VIEWCLASS_64_BITS].first.push_back(GL_RGBA16F);
    mixedViewClasses[VIEWCLASS_64_BITS].first.push_back(GL_RGBA16UI);
    mixedViewClasses[VIEWCLASS_64_BITS].first.push_back(GL_RGBA16I);

    mixedViewClasses[VIEWCLASS_64_BITS].first.push_back(GL_RG32F);
    mixedViewClasses[VIEWCLASS_64_BITS].first.push_back(GL_RG32UI);
    mixedViewClasses[VIEWCLASS_64_BITS].first.push_back(GL_RG32I);

    // Compressed
    mixedViewClasses[VIEWCLASS_64_BITS].second.push_back(GL_COMPRESSED_R11_EAC);
    mixedViewClasses[VIEWCLASS_64_BITS].second.push_back(GL_COMPRESSED_SIGNED_R11_EAC);

    {
        TestCaseGroup *const nonCompressedGroup =
            new TestCaseGroup(m_context, "non_compressed", "Test copying between textures.");
        addChild(nonCompressedGroup);
        for (map<ViewClass, vector<uint32_t>>::const_iterator viewClassIter = textureFormatViewClasses.begin();
             viewClassIter != textureFormatViewClasses.end(); ++viewClassIter)
        {
            const vector<uint32_t> &formats = viewClassIter->second;
            const ViewClass viewClass       = viewClassIter->first;
            TestCaseGroup *const viewGroup =
                new TestCaseGroup(m_context, viewClassToName(viewClass), viewClassToName(viewClass));

            nonCompressedGroup->addChild(viewGroup);

            for (int srcFormatNdx = 0; srcFormatNdx < (int)formats.size(); srcFormatNdx++)
                for (int dstFormatNdx = 0; dstFormatNdx < (int)formats.size(); dstFormatNdx++)
                {
                    const uint32_t srcFormat = formats[srcFormatNdx];
                    const uint32_t dstFormat = formats[dstFormatNdx];

                    if (srcFormat != dstFormat && isFloatFormat(srcFormat) && isFloatFormat(dstFormat))
                        continue;

                    addCopyTests(viewGroup, srcFormat, dstFormat);
                }
        }
    }

    // ES only
    if (!m_isGL45)
    {
        TestCaseGroup *const compressedGroup =
            new TestCaseGroup(m_context, "compressed", "Test copying between compressed textures.");
        addChild(compressedGroup);

        for (map<ViewClass, vector<uint32_t>>::const_iterator viewClassIter =
                 compressedTextureFormatViewClasses.begin();
             viewClassIter != compressedTextureFormatViewClasses.end(); ++viewClassIter)
        {
            const vector<uint32_t> &formats = viewClassIter->second;
            const ViewClass viewClass       = viewClassIter->first;
            TestCaseGroup *const viewGroup =
                new TestCaseGroup(m_context, viewClassToName(viewClass), viewClassToName(viewClass));

            compressedGroup->addChild(viewGroup);

            for (int srcFormatNdx = 0; srcFormatNdx < (int)formats.size(); srcFormatNdx++)
                for (int dstFormatNdx = 0; dstFormatNdx < (int)formats.size(); dstFormatNdx++)
                {
                    const uint32_t srcFormat = formats[srcFormatNdx];
                    const uint32_t dstFormat = formats[dstFormatNdx];

                    if (srcFormat != dstFormat && isFloatFormat(srcFormat) && isFloatFormat(dstFormat))
                        continue;

                    addCopyTests(viewGroup, srcFormat, dstFormat);
                }
        }
    }

    // ES only
    if (!m_isGL45)
    {
        TestCaseGroup *const mixedGroup =
            new TestCaseGroup(m_context, "mixed", "Test copying between compressed and non-compressed textures.");
        addChild(mixedGroup);

        for (map<ViewClass, pair<vector<uint32_t>, vector<uint32_t>>>::const_iterator iter = mixedViewClasses.begin();
             iter != mixedViewClasses.end(); ++iter)
        {
            const ViewClass viewClass      = iter->first;
            const string viewClassName     = string(viewClassToName(viewClass)) + "_mixed";
            TestCaseGroup *const viewGroup = new TestCaseGroup(m_context, viewClassName.c_str(), viewClassName.c_str());

            const vector<uint32_t> nonCompressedFormats = iter->second.first;
            const vector<uint32_t> compressedFormats    = iter->second.second;

            mixedGroup->addChild(viewGroup);

            for (int srcFormatNdx = 0; srcFormatNdx < (int)nonCompressedFormats.size(); srcFormatNdx++)
                for (int dstFormatNdx = 0; dstFormatNdx < (int)compressedFormats.size(); dstFormatNdx++)
                {
                    const uint32_t srcFormat = nonCompressedFormats[srcFormatNdx];
                    const uint32_t dstFormat = compressedFormats[dstFormatNdx];

                    if (srcFormat != dstFormat && isFloatFormat(srcFormat) && isFloatFormat(dstFormat))
                        continue;

                    addCopyTests(viewGroup, srcFormat, dstFormat);
                    addCopyTests(viewGroup, dstFormat, srcFormat);
                }
        }
    }
}

} // namespace

TestCaseGroup *createCopyImageTests(Context &context, bool is_GL45)
{
    return new CopyImageTests(context, is_GL45);
}

} // namespace Functional
} // namespace gles31
} // namespace deqp