/*-------------------------------------------------------------------------
 * 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 SSBO layout tests.
 *//*--------------------------------------------------------------------*/

#include "es31fSSBOLayoutTests.hpp"
#include "es31fSSBOLayoutCase.hpp"
#include "tcuCommandLine.hpp"
#include "deRandom.hpp"
#include "deStringUtil.hpp"
#include "deString.h"

using std::string;
using std::vector;

namespace deqp
{
namespace gles31
{
namespace Functional
{

using namespace bb;
using glu::StructType;
using glu::VarType;

namespace
{

enum FeatureBits
{
    FEATURE_VECTORS          = (1 << 0),
    FEATURE_MATRICES         = (1 << 1),
    FEATURE_ARRAYS           = (1 << 2),
    FEATURE_STRUCTS          = (1 << 3),
    FEATURE_NESTED_STRUCTS   = (1 << 4),
    FEATURE_INSTANCE_ARRAYS  = (1 << 5),
    FEATURE_UNUSED_VARS      = (1 << 6),
    FEATURE_UNUSED_MEMBERS   = (1 << 7),
    FEATURE_PACKED_LAYOUT    = (1 << 8),
    FEATURE_SHARED_LAYOUT    = (1 << 9),
    FEATURE_STD140_LAYOUT    = (1 << 10),
    FEATURE_STD430_LAYOUT    = (1 << 11),
    FEATURE_MATRIX_LAYOUT    = (1 << 12), //!< Matrix layout flags.
    FEATURE_UNSIZED_ARRAYS   = (1 << 13),
    FEATURE_ARRAYS_OF_ARRAYS = (1 << 14)
};

class RandomSSBOLayoutCase : public SSBOLayoutCase
{
public:
    RandomSSBOLayoutCase(Context &context, const char *name, const char *description, BufferMode bufferMode,
                         uint32_t features, uint32_t seed);

    void init(void);

private:
    void generateBlock(de::Random &rnd, uint32_t layoutFlags);
    void generateBufferVar(de::Random &rnd, BufferBlock &block, bool isLastMember);
    glu::VarType generateType(de::Random &rnd, int structDepth, int arrayDepth, bool arrayOk, bool unusedArrayOk);

    uint32_t m_features;
    int m_maxBlocks;
    int m_maxInstances;
    int m_maxArrayLength;
    int m_maxArrayDepth;
    int m_maxStructDepth;
    int m_maxBlockMembers;
    int m_maxStructMembers;
    uint32_t m_seed;

    int m_blockNdx;
    int m_bufferVarNdx;
    int m_structNdx;
};

RandomSSBOLayoutCase::RandomSSBOLayoutCase(Context &context, const char *name, const char *description,
                                           BufferMode bufferMode, uint32_t features, uint32_t seed)
    : SSBOLayoutCase(context.getTestContext(), context.getRenderContext(), name, description, glu::GLSL_VERSION_310_ES,
                     bufferMode)
    , m_features(features)
    , m_maxBlocks(3)
    , m_maxInstances((features & FEATURE_INSTANCE_ARRAYS) ? 3 : 0)
    , m_maxArrayLength((features & FEATURE_ARRAYS) ? 8 : 0)
    , m_maxArrayDepth((features & FEATURE_ARRAYS_OF_ARRAYS) ? 2 : 0)
    , m_maxStructDepth((features & FEATURE_STRUCTS) ? 2 : 0)
    , m_maxBlockMembers(4)
    , m_maxStructMembers(4)
    , m_seed(seed)
    , m_blockNdx(1)
    , m_bufferVarNdx(1)
    , m_structNdx(1)
{
}

void RandomSSBOLayoutCase::init(void)
{
    de::Random rnd(m_seed);

    const int numBlocks = rnd.getInt(1, m_maxBlocks);

    for (int ndx = 0; ndx < numBlocks; ndx++)
        generateBlock(rnd, 0);
}

void RandomSSBOLayoutCase::generateBlock(de::Random &rnd, uint32_t layoutFlags)
{
    DE_ASSERT(m_blockNdx <= 'z' - 'a');

    const float instanceArrayWeight = 0.3f;
    BufferBlock &block              = m_interface.allocBlock((string("Block") + (char)('A' + m_blockNdx)).c_str());
    int numInstances = (m_maxInstances > 0 && rnd.getFloat() < instanceArrayWeight) ? rnd.getInt(0, m_maxInstances) : 0;
    int numVars      = rnd.getInt(1, m_maxBlockMembers);

    if (numInstances > 0)
        block.setArraySize(numInstances);

    if (numInstances > 0 || rnd.getBool())
        block.setInstanceName((string("block") + (char)('A' + m_blockNdx)).c_str());

    // Layout flag candidates.
    vector<uint32_t> layoutFlagCandidates;
    layoutFlagCandidates.push_back(0);
    if (m_features & FEATURE_PACKED_LAYOUT)
        layoutFlagCandidates.push_back(LAYOUT_PACKED);
    if ((m_features & FEATURE_SHARED_LAYOUT))
        layoutFlagCandidates.push_back(LAYOUT_SHARED);
    if (m_features & FEATURE_STD140_LAYOUT)
        layoutFlagCandidates.push_back(LAYOUT_STD140);

    layoutFlags |= rnd.choose<uint32_t>(layoutFlagCandidates.begin(), layoutFlagCandidates.end());

    if (m_features & FEATURE_MATRIX_LAYOUT)
    {
        static const uint32_t matrixCandidates[] = {0, LAYOUT_ROW_MAJOR, LAYOUT_COLUMN_MAJOR};
        layoutFlags |=
            rnd.choose<uint32_t>(&matrixCandidates[0], &matrixCandidates[DE_LENGTH_OF_ARRAY(matrixCandidates)]);
    }

    block.setFlags(layoutFlags);

    for (int ndx = 0; ndx < numVars; ndx++)
        generateBufferVar(rnd, block, (ndx + 1 == numVars));

    if (numVars > 0)
    {
        const BufferVar &lastVar     = *(block.end() - 1);
        const glu::VarType &lastType = lastVar.getType();
        const bool isUnsizedArr = lastType.isArrayType() && (lastType.getArraySize() == glu::VarType::UNSIZED_ARRAY);

        if (isUnsizedArr)
        {
            for (int instanceNdx = 0; instanceNdx < (numInstances ? numInstances : 1); instanceNdx++)
            {
                const int arrSize = rnd.getInt(0, m_maxArrayLength);
                block.setLastUnsizedArraySize(instanceNdx, arrSize);
            }
        }
    }

    m_blockNdx += 1;
}

static std::string genName(char first, char last, int ndx)
{
    std::string str = "";
    int alphabetLen = last - first + 1;

    while (ndx > alphabetLen)
    {
        str.insert(str.begin(), (char)(first + ((ndx - 1) % alphabetLen)));
        ndx = ((ndx - 1) / alphabetLen);
    }

    str.insert(str.begin(), (char)(first + (ndx % (alphabetLen + 1)) - 1));

    return str;
}

void RandomSSBOLayoutCase::generateBufferVar(de::Random &rnd, BufferBlock &block, bool isLastMember)
{
    const float readWeight   = 0.7f;
    const float writeWeight  = 0.7f;
    const float accessWeight = 0.85f;
    const bool unusedOk      = (m_features & FEATURE_UNUSED_VARS) != 0;
    const std::string name   = genName('a', 'z', m_bufferVarNdx);
    const glu::VarType type  = generateType(rnd, 0, 0, true, isLastMember && (m_features & FEATURE_UNSIZED_ARRAYS));
    const bool access        = !unusedOk || (rnd.getFloat() < accessWeight);
    const bool read          = access ? (rnd.getFloat() < readWeight) : false;
    const bool write         = access ? (!read || (rnd.getFloat() < writeWeight)) : false;
    const uint32_t flags     = (read ? ACCESS_READ : 0) | (write ? ACCESS_WRITE : 0);

    block.addMember(BufferVar(name.c_str(), type, flags));

    m_bufferVarNdx += 1;
}

glu::VarType RandomSSBOLayoutCase::generateType(de::Random &rnd, int structDepth, int arrayDepth, bool arrayOk,
                                                bool unsizedArrayOk)
{
    const float structWeight       = 0.1f;
    const float arrayWeight        = 0.1f;
    const float unsizedArrayWeight = 0.8f;

    DE_ASSERT(arrayOk || !unsizedArrayOk);

    if (unsizedArrayOk && (rnd.getFloat() < unsizedArrayWeight))
    {
        const bool childArrayOk = ((m_features & FEATURE_ARRAYS_OF_ARRAYS) != 0) && (arrayDepth < m_maxArrayDepth);
        const glu::VarType elementType = generateType(rnd, structDepth, arrayDepth + 1, childArrayOk, false);
        return glu::VarType(elementType, glu::VarType::UNSIZED_ARRAY);
    }
    else if (structDepth < m_maxStructDepth && rnd.getFloat() < structWeight)
    {
        // \todo [2013-10-14 pyry] Implement unused flags for members!
        // bool unusedOk = (m_features & FEATURE_UNUSED_MEMBERS) != 0;
        vector<glu::VarType> memberTypes;
        int numMembers = rnd.getInt(1, m_maxStructMembers);

        // Generate members first so nested struct declarations are in correct order.
        for (int ndx = 0; ndx < numMembers; ndx++)
            memberTypes.push_back(
                generateType(rnd, structDepth + 1, arrayDepth, (arrayDepth < m_maxArrayDepth), false));

        glu::StructType &structType = m_interface.allocStruct((string("s") + genName('A', 'Z', m_structNdx)).c_str());
        m_structNdx += 1;

        DE_ASSERT(numMembers <= 'Z' - 'A');
        for (int ndx = 0; ndx < numMembers; ndx++)
        {
            structType.addMember((string("m") + (char)('A' + ndx)).c_str(), memberTypes[ndx]);
        }

        return glu::VarType(&structType);
    }
    else if (m_maxArrayLength > 0 && arrayOk && rnd.getFloat() < arrayWeight)
    {
        const int arrayLength   = rnd.getInt(1, m_maxArrayLength);
        const bool childArrayOk = ((m_features & FEATURE_ARRAYS_OF_ARRAYS) != 0) && (arrayDepth < m_maxArrayDepth);
        const glu::VarType elementType = generateType(rnd, structDepth, arrayDepth + 1, childArrayOk, false);

        return glu::VarType(elementType, arrayLength);
    }
    else
    {
        vector<glu::DataType> typeCandidates;

        typeCandidates.push_back(glu::TYPE_FLOAT);
        typeCandidates.push_back(glu::TYPE_INT);
        typeCandidates.push_back(glu::TYPE_UINT);
        typeCandidates.push_back(glu::TYPE_BOOL);

        if (m_features & FEATURE_VECTORS)
        {
            typeCandidates.push_back(glu::TYPE_FLOAT_VEC2);
            typeCandidates.push_back(glu::TYPE_FLOAT_VEC3);
            typeCandidates.push_back(glu::TYPE_FLOAT_VEC4);
            typeCandidates.push_back(glu::TYPE_INT_VEC2);
            typeCandidates.push_back(glu::TYPE_INT_VEC3);
            typeCandidates.push_back(glu::TYPE_INT_VEC4);
            typeCandidates.push_back(glu::TYPE_UINT_VEC2);
            typeCandidates.push_back(glu::TYPE_UINT_VEC3);
            typeCandidates.push_back(glu::TYPE_UINT_VEC4);
            typeCandidates.push_back(glu::TYPE_BOOL_VEC2);
            typeCandidates.push_back(glu::TYPE_BOOL_VEC3);
            typeCandidates.push_back(glu::TYPE_BOOL_VEC4);
        }

        if (m_features & FEATURE_MATRICES)
        {
            typeCandidates.push_back(glu::TYPE_FLOAT_MAT2);
            typeCandidates.push_back(glu::TYPE_FLOAT_MAT2X3);
            typeCandidates.push_back(glu::TYPE_FLOAT_MAT3X2);
            typeCandidates.push_back(glu::TYPE_FLOAT_MAT3);
            typeCandidates.push_back(glu::TYPE_FLOAT_MAT3X4);
            typeCandidates.push_back(glu::TYPE_FLOAT_MAT4X2);
            typeCandidates.push_back(glu::TYPE_FLOAT_MAT4X3);
            typeCandidates.push_back(glu::TYPE_FLOAT_MAT4);
        }

        glu::DataType type = rnd.choose<glu::DataType>(typeCandidates.begin(), typeCandidates.end());
        glu::Precision precision;

        if (!glu::isDataTypeBoolOrBVec(type))
        {
            // Precision.
            static const glu::Precision precisionCandidates[] = {glu::PRECISION_LOWP, glu::PRECISION_MEDIUMP,
                                                                 glu::PRECISION_HIGHP};
            precision                                         = rnd.choose<glu::Precision>(&precisionCandidates[0],
                                                   &precisionCandidates[DE_LENGTH_OF_ARRAY(precisionCandidates)]);
        }
        else
            precision = glu::PRECISION_LAST;

        return glu::VarType(type, precision);
    }
}

class BlockBasicTypeCase : public SSBOLayoutCase
{
public:
    BlockBasicTypeCase(Context &context, const char *name, const char *description, const VarType &type,
                       uint32_t layoutFlags, int numInstances)
        : SSBOLayoutCase(context.getTestContext(), context.getRenderContext(), name, description,
                         glu::GLSL_VERSION_310_ES, BUFFERMODE_PER_BLOCK)
    {
        BufferBlock &block = m_interface.allocBlock("Block");
        block.addMember(BufferVar("var", type, ACCESS_READ | ACCESS_WRITE));
        block.setFlags(layoutFlags);

        if (numInstances > 0)
        {
            block.setArraySize(numInstances);
            block.setInstanceName("block");
        }
    }
};

class BlockBasicUnsizedArrayCase : public SSBOLayoutCase
{
public:
    BlockBasicUnsizedArrayCase(Context &context, const char *name, const char *description, const VarType &elementType,
                               int arraySize, uint32_t layoutFlags)
        : SSBOLayoutCase(context.getTestContext(), context.getRenderContext(), name, description,
                         glu::GLSL_VERSION_310_ES, BUFFERMODE_PER_BLOCK)
    {
        BufferBlock &block = m_interface.allocBlock("Block");
        block.addMember(BufferVar("var", VarType(elementType, VarType::UNSIZED_ARRAY), ACCESS_READ | ACCESS_WRITE));
        block.setFlags(layoutFlags);

        block.setLastUnsizedArraySize(0, arraySize);
    }
};

static void createRandomCaseGroup(tcu::TestCaseGroup *parentGroup, Context &context, const char *groupName,
                                  const char *description, SSBOLayoutCase::BufferMode bufferMode, uint32_t features,
                                  int numCases, uint32_t baseSeed)
{
    tcu::TestCaseGroup *group = new tcu::TestCaseGroup(context.getTestContext(), groupName, description);
    parentGroup->addChild(group);

    baseSeed += (uint32_t)context.getTestContext().getCommandLine().getBaseSeed();

    for (int ndx = 0; ndx < numCases; ndx++)
        group->addChild(new RandomSSBOLayoutCase(context, de::toString(ndx).c_str(), "", bufferMode, features,
                                                 (uint32_t)ndx + baseSeed));
}

class BlockSingleStructCase : public SSBOLayoutCase
{
public:
    BlockSingleStructCase(Context &context, const char *name, const char *description, uint32_t layoutFlags,
                          BufferMode bufferMode, int numInstances)
        : SSBOLayoutCase(context.getTestContext(), context.getRenderContext(), name, description,
                         glu::GLSL_VERSION_310_ES, bufferMode)
        , m_layoutFlags(layoutFlags)
        , m_numInstances(numInstances)
    {
    }

    void init(void)
    {
        StructType &typeS = m_interface.allocStruct("S");
        typeS.addMember("a", VarType(glu::TYPE_INT_VEC3, glu::PRECISION_HIGHP)); // \todo [pyry] First member is unused.
        typeS.addMember("b", VarType(VarType(glu::TYPE_FLOAT_MAT3, glu::PRECISION_MEDIUMP), 4));
        typeS.addMember("c", VarType(glu::TYPE_FLOAT_VEC4, glu::PRECISION_HIGHP));

        BufferBlock &block = m_interface.allocBlock("Block");
        block.addMember(BufferVar("s", VarType(&typeS), ACCESS_READ | ACCESS_WRITE));
        block.setFlags(m_layoutFlags);

        if (m_numInstances > 0)
        {
            block.setInstanceName("block");
            block.setArraySize(m_numInstances);
        }
    }

private:
    uint32_t m_layoutFlags;
    int m_numInstances;
};

class BlockSingleStructArrayCase : public SSBOLayoutCase
{
public:
    BlockSingleStructArrayCase(Context &context, const char *name, const char *description, uint32_t layoutFlags,
                               BufferMode bufferMode, int numInstances)
        : SSBOLayoutCase(context.getTestContext(), context.getRenderContext(), name, description,
                         glu::GLSL_VERSION_310_ES, bufferMode)
        , m_layoutFlags(layoutFlags)
        , m_numInstances(numInstances)
    {
    }

    void init(void)
    {
        StructType &typeS = m_interface.allocStruct("S");
        typeS.addMember("a", VarType(glu::TYPE_INT_VEC3, glu::PRECISION_HIGHP)); // \todo [pyry] UNUSED
        typeS.addMember("b", VarType(VarType(glu::TYPE_FLOAT_MAT3, glu::PRECISION_MEDIUMP), 4));
        typeS.addMember("c", VarType(glu::TYPE_FLOAT_VEC4, glu::PRECISION_HIGHP));

        BufferBlock &block = m_interface.allocBlock("Block");
        block.addMember(BufferVar("u", VarType(glu::TYPE_UINT, glu::PRECISION_LOWP), 0 /* no access */));
        block.addMember(BufferVar("s", VarType(VarType(&typeS), 3), ACCESS_READ | ACCESS_WRITE));
        block.addMember(BufferVar("v", VarType(glu::TYPE_FLOAT_VEC4, glu::PRECISION_MEDIUMP), ACCESS_WRITE));
        block.setFlags(m_layoutFlags);

        if (m_numInstances > 0)
        {
            block.setInstanceName("block");
            block.setArraySize(m_numInstances);
        }
    }

private:
    uint32_t m_layoutFlags;
    int m_numInstances;
};

class BlockSingleNestedStructCase : public SSBOLayoutCase
{
public:
    BlockSingleNestedStructCase(Context &context, const char *name, const char *description, uint32_t layoutFlags,
                                BufferMode bufferMode, int numInstances)
        : SSBOLayoutCase(context.getTestContext(), context.getRenderContext(), name, description,
                         glu::GLSL_VERSION_310_ES, bufferMode)
        , m_layoutFlags(layoutFlags)
        , m_numInstances(numInstances)
    {
    }

    void init(void)
    {
        StructType &typeS = m_interface.allocStruct("S");
        typeS.addMember("a", VarType(glu::TYPE_INT_VEC3, glu::PRECISION_HIGHP));
        typeS.addMember("b", VarType(VarType(glu::TYPE_FLOAT_MAT3, glu::PRECISION_MEDIUMP), 4));
        typeS.addMember("c", VarType(glu::TYPE_FLOAT_VEC4, glu::PRECISION_HIGHP)); // \todo [pyry] UNUSED

        StructType &typeT = m_interface.allocStruct("T");
        typeT.addMember("a", VarType(glu::TYPE_FLOAT_MAT3, glu::PRECISION_MEDIUMP));
        typeT.addMember("b", VarType(&typeS));

        BufferBlock &block = m_interface.allocBlock("Block");
        block.addMember(BufferVar("s", VarType(&typeS), ACCESS_READ));
        block.addMember(BufferVar("v", VarType(glu::TYPE_FLOAT_VEC2, glu::PRECISION_LOWP), 0 /* no access */));
        block.addMember(BufferVar("t", VarType(&typeT), ACCESS_READ | ACCESS_WRITE));
        block.addMember(BufferVar("u", VarType(glu::TYPE_UINT, glu::PRECISION_HIGHP), ACCESS_WRITE));
        block.setFlags(m_layoutFlags);

        if (m_numInstances > 0)
        {
            block.setInstanceName("block");
            block.setArraySize(m_numInstances);
        }
    }

private:
    uint32_t m_layoutFlags;
    int m_numInstances;
};

class BlockSingleNestedStructArrayCase : public SSBOLayoutCase
{
public:
    BlockSingleNestedStructArrayCase(Context &context, const char *name, const char *description, uint32_t layoutFlags,
                                     BufferMode bufferMode, int numInstances)
        : SSBOLayoutCase(context.getTestContext(), context.getRenderContext(), name, description,
                         glu::GLSL_VERSION_310_ES, bufferMode)
        , m_layoutFlags(layoutFlags)
        , m_numInstances(numInstances)
    {
    }

    void init(void)
    {
        StructType &typeS = m_interface.allocStruct("S");
        typeS.addMember("a", VarType(glu::TYPE_INT_VEC3, glu::PRECISION_HIGHP));
        typeS.addMember("b", VarType(VarType(glu::TYPE_INT_VEC2, glu::PRECISION_MEDIUMP), 4));
        typeS.addMember("c", VarType(glu::TYPE_FLOAT_VEC4, glu::PRECISION_HIGHP)); // \todo [pyry] UNUSED

        StructType &typeT = m_interface.allocStruct("T");
        typeT.addMember("a", VarType(glu::TYPE_FLOAT_MAT3, glu::PRECISION_MEDIUMP));
        typeT.addMember("b", VarType(VarType(&typeS), 3));

        BufferBlock &block = m_interface.allocBlock("Block");
        block.addMember(BufferVar("s", VarType(&typeS), ACCESS_WRITE));
        block.addMember(BufferVar("v", VarType(glu::TYPE_FLOAT_VEC2, glu::PRECISION_LOWP), 0 /* no access */));
        block.addMember(BufferVar("t", VarType(VarType(&typeT), 2), ACCESS_READ));
        block.addMember(BufferVar("u", VarType(glu::TYPE_UINT, glu::PRECISION_HIGHP), ACCESS_READ | ACCESS_WRITE));
        block.setFlags(m_layoutFlags);

        if (m_numInstances > 0)
        {
            block.setInstanceName("block");
            block.setArraySize(m_numInstances);
        }
    }

private:
    uint32_t m_layoutFlags;
    int m_numInstances;
};

class BlockUnsizedStructArrayCase : public SSBOLayoutCase
{
public:
    BlockUnsizedStructArrayCase(Context &context, const char *name, const char *description, uint32_t layoutFlags,
                                BufferMode bufferMode, int numInstances)
        : SSBOLayoutCase(context.getTestContext(), context.getRenderContext(), name, description,
                         glu::GLSL_VERSION_310_ES, bufferMode)
        , m_layoutFlags(layoutFlags)
        , m_numInstances(numInstances)
    {
    }

    void init(void)
    {
        StructType &typeS = m_interface.allocStruct("S");
        typeS.addMember("a", VarType(glu::TYPE_UINT_VEC2, glu::PRECISION_HIGHP)); // \todo [pyry] UNUSED
        typeS.addMember("b", VarType(VarType(glu::TYPE_FLOAT_MAT2X4, glu::PRECISION_MEDIUMP), 4));
        typeS.addMember("c", VarType(glu::TYPE_FLOAT_VEC3, glu::PRECISION_HIGHP));

        BufferBlock &block = m_interface.allocBlock("Block");
        block.addMember(BufferVar("u", VarType(glu::TYPE_FLOAT_VEC2, glu::PRECISION_LOWP), 0 /* no access */));
        block.addMember(BufferVar("v", VarType(glu::TYPE_UINT, glu::PRECISION_MEDIUMP), ACCESS_WRITE));
        block.addMember(BufferVar("s", VarType(VarType(&typeS), VarType::UNSIZED_ARRAY), ACCESS_READ | ACCESS_WRITE));
        block.setFlags(m_layoutFlags);

        if (m_numInstances > 0)
        {
            block.setInstanceName("block");
            block.setArraySize(m_numInstances);
        }

        {
            de::Random rnd(246);
            for (int ndx = 0; ndx < (m_numInstances ? m_numInstances : 1); ndx++)
            {
                const int lastArrayLen = rnd.getInt(1, 5);
                block.setLastUnsizedArraySize(ndx, lastArrayLen);
            }
        }
    }

private:
    uint32_t m_layoutFlags;
    int m_numInstances;
};

class Block2LevelUnsizedStructArrayCase : public SSBOLayoutCase
{
public:
    Block2LevelUnsizedStructArrayCase(Context &context, const char *name, const char *description, uint32_t layoutFlags,
                                      BufferMode bufferMode, int numInstances)
        : SSBOLayoutCase(context.getTestContext(), context.getRenderContext(), name, description,
                         glu::GLSL_VERSION_310_ES, bufferMode)
        , m_layoutFlags(layoutFlags)
        , m_numInstances(numInstances)
    {
    }

    void init(void)
    {
        StructType &typeS = m_interface.allocStruct("S");
        typeS.addMember("a", VarType(glu::TYPE_INT_VEC3, glu::PRECISION_HIGHP));
        typeS.addMember("c", VarType(glu::TYPE_FLOAT_VEC4, glu::PRECISION_HIGHP));

        BufferBlock &block = m_interface.allocBlock("Block");
        block.addMember(BufferVar("u", VarType(glu::TYPE_UINT, glu::PRECISION_LOWP), 0 /* no access */));
        block.addMember(BufferVar("v", VarType(glu::TYPE_FLOAT_VEC4, glu::PRECISION_MEDIUMP), ACCESS_WRITE));
        block.addMember(
            BufferVar("s", VarType(VarType(VarType(&typeS), 2), VarType::UNSIZED_ARRAY), ACCESS_READ | ACCESS_WRITE));
        block.setFlags(m_layoutFlags);

        if (m_numInstances > 0)
        {
            block.setInstanceName("block");
            block.setArraySize(m_numInstances);
        }

        {
            de::Random rnd(2344);
            for (int ndx = 0; ndx < (m_numInstances ? m_numInstances : 1); ndx++)
            {
                const int lastArrayLen = rnd.getInt(1, 5);
                block.setLastUnsizedArraySize(ndx, lastArrayLen);
            }
        }
    }

private:
    uint32_t m_layoutFlags;
    int m_numInstances;
};

class BlockUnsizedNestedStructArrayCase : public SSBOLayoutCase
{
public:
    BlockUnsizedNestedStructArrayCase(Context &context, const char *name, const char *description, uint32_t layoutFlags,
                                      BufferMode bufferMode, int numInstances)
        : SSBOLayoutCase(context.getTestContext(), context.getRenderContext(), name, description,
                         glu::GLSL_VERSION_310_ES, bufferMode)
        , m_layoutFlags(layoutFlags)
        , m_numInstances(numInstances)
    {
    }

    void init(void)
    {
        StructType &typeS = m_interface.allocStruct("S");
        typeS.addMember("a", VarType(glu::TYPE_UINT_VEC3, glu::PRECISION_HIGHP));
        typeS.addMember("b", VarType(VarType(glu::TYPE_FLOAT_VEC2, glu::PRECISION_MEDIUMP), 4));
        typeS.addMember("c", VarType(glu::TYPE_FLOAT_VEC4, glu::PRECISION_HIGHP)); // \todo [pyry] UNUSED

        StructType &typeT = m_interface.allocStruct("T");
        typeT.addMember("a", VarType(glu::TYPE_FLOAT_MAT4X3, glu::PRECISION_MEDIUMP));
        typeT.addMember("b", VarType(VarType(&typeS), 3));
        typeT.addMember("c", VarType(glu::TYPE_INT, glu::PRECISION_HIGHP));

        BufferBlock &block = m_interface.allocBlock("Block");
        block.addMember(BufferVar("s", VarType(&typeS), ACCESS_WRITE));
        block.addMember(BufferVar("v", VarType(glu::TYPE_FLOAT_VEC2, glu::PRECISION_LOWP), 0 /* no access */));
        block.addMember(BufferVar("u", VarType(glu::TYPE_UINT, glu::PRECISION_HIGHP), ACCESS_READ | ACCESS_WRITE));
        block.addMember(BufferVar("t", VarType(VarType(&typeT), VarType::UNSIZED_ARRAY), ACCESS_READ));
        block.setFlags(m_layoutFlags);

        if (m_numInstances > 0)
        {
            block.setInstanceName("block");
            block.setArraySize(m_numInstances);
        }

        {
            de::Random rnd(7921);
            for (int ndx = 0; ndx < (m_numInstances ? m_numInstances : 1); ndx++)
            {
                const int lastArrayLen = rnd.getInt(1, 5);
                block.setLastUnsizedArraySize(ndx, lastArrayLen);
            }
        }
    }

private:
    uint32_t m_layoutFlags;
    int m_numInstances;
};

class BlockMultiBasicTypesCase : public SSBOLayoutCase
{
public:
    BlockMultiBasicTypesCase(Context &context, const char *name, const char *description, uint32_t flagsA,
                             uint32_t flagsB, BufferMode bufferMode, int numInstances)
        : SSBOLayoutCase(context.getTestContext(), context.getRenderContext(), name, description,
                         glu::GLSL_VERSION_310_ES, bufferMode)
        , m_flagsA(flagsA)
        , m_flagsB(flagsB)
        , m_numInstances(numInstances)
    {
    }

    void init(void)
    {
        BufferBlock &blockA = m_interface.allocBlock("BlockA");
        blockA.addMember(BufferVar("a", VarType(glu::TYPE_FLOAT, glu::PRECISION_HIGHP), ACCESS_READ | ACCESS_WRITE));
        blockA.addMember(BufferVar("b", VarType(glu::TYPE_UINT_VEC3, glu::PRECISION_LOWP), 0 /* no access */));
        blockA.addMember(BufferVar("c", VarType(glu::TYPE_FLOAT_MAT2, glu::PRECISION_MEDIUMP), ACCESS_READ));
        blockA.setInstanceName("blockA");
        blockA.setFlags(m_flagsA);

        BufferBlock &blockB = m_interface.allocBlock("BlockB");
        blockB.addMember(BufferVar("a", VarType(glu::TYPE_FLOAT_MAT3, glu::PRECISION_MEDIUMP), ACCESS_WRITE));
        blockB.addMember(BufferVar("b", VarType(glu::TYPE_INT_VEC2, glu::PRECISION_LOWP), ACCESS_READ));
        blockB.addMember(BufferVar("c", VarType(glu::TYPE_FLOAT_VEC4, glu::PRECISION_HIGHP), 0 /* no access */));
        blockB.addMember(BufferVar("d", VarType(glu::TYPE_BOOL, glu::PRECISION_LAST), ACCESS_READ | ACCESS_WRITE));
        blockB.setInstanceName("blockB");
        blockB.setFlags(m_flagsB);

        if (m_numInstances > 0)
        {
            blockA.setArraySize(m_numInstances);
            blockB.setArraySize(m_numInstances);
        }
    }

private:
    uint32_t m_flagsA;
    uint32_t m_flagsB;
    int m_numInstances;
};

class BlockMultiNestedStructCase : public SSBOLayoutCase
{
public:
    BlockMultiNestedStructCase(Context &context, const char *name, const char *description, uint32_t flagsA,
                               uint32_t flagsB, BufferMode bufferMode, int numInstances)
        : SSBOLayoutCase(context.getTestContext(), context.getRenderContext(), name, description,
                         glu::GLSL_VERSION_310_ES, bufferMode)
        , m_flagsA(flagsA)
        , m_flagsB(flagsB)
        , m_numInstances(numInstances)
    {
    }

    void init(void)
    {
        StructType &typeS = m_interface.allocStruct("S");
        typeS.addMember("a", VarType(glu::TYPE_FLOAT_MAT3, glu::PRECISION_LOWP));
        typeS.addMember("b", VarType(VarType(glu::TYPE_INT_VEC2, glu::PRECISION_MEDIUMP), 4));
        typeS.addMember("c", VarType(glu::TYPE_FLOAT_VEC4, glu::PRECISION_HIGHP));

        StructType &typeT = m_interface.allocStruct("T");
        typeT.addMember("a", VarType(glu::TYPE_UINT, glu::PRECISION_MEDIUMP)); // \todo [pyry] UNUSED
        typeT.addMember("b", VarType(&typeS));
        typeT.addMember("c", VarType(glu::TYPE_BOOL_VEC4, glu::PRECISION_LAST));

        BufferBlock &blockA = m_interface.allocBlock("BlockA");
        blockA.addMember(BufferVar("a", VarType(glu::TYPE_FLOAT, glu::PRECISION_HIGHP), ACCESS_READ | ACCESS_WRITE));
        blockA.addMember(BufferVar("b", VarType(&typeS), ACCESS_WRITE));
        blockA.addMember(BufferVar("c", VarType(glu::TYPE_UINT_VEC3, glu::PRECISION_LOWP), 0 /* no access */));
        blockA.setInstanceName("blockA");
        blockA.setFlags(m_flagsA);

        BufferBlock &blockB = m_interface.allocBlock("BlockB");
        blockB.addMember(BufferVar("a", VarType(glu::TYPE_FLOAT_MAT2, glu::PRECISION_MEDIUMP), ACCESS_WRITE));
        blockB.addMember(BufferVar("b", VarType(&typeT), ACCESS_READ | ACCESS_WRITE));
        blockB.addMember(BufferVar("c", VarType(glu::TYPE_BOOL_VEC4, glu::PRECISION_LAST), 0 /* no access */));
        blockB.addMember(BufferVar("d", VarType(glu::TYPE_BOOL, glu::PRECISION_LAST), ACCESS_READ | ACCESS_WRITE));
        blockB.setInstanceName("blockB");
        blockB.setFlags(m_flagsB);

        if (m_numInstances > 0)
        {
            blockA.setArraySize(m_numInstances);
            blockB.setArraySize(m_numInstances);
        }
    }

private:
    uint32_t m_flagsA;
    uint32_t m_flagsB;
    int m_numInstances;
};

} // namespace

SSBOLayoutTests::SSBOLayoutTests(Context &context) : TestCaseGroup(context, "layout", "SSBO Layout Tests")
{
}

SSBOLayoutTests::~SSBOLayoutTests(void)
{
}

void SSBOLayoutTests::init(void)
{
    static const glu::DataType basicTypes[] = {
        glu::TYPE_FLOAT,        glu::TYPE_FLOAT_VEC2,   glu::TYPE_FLOAT_VEC3,   glu::TYPE_FLOAT_VEC4,
        glu::TYPE_INT,          glu::TYPE_INT_VEC2,     glu::TYPE_INT_VEC3,     glu::TYPE_INT_VEC4,
        glu::TYPE_UINT,         glu::TYPE_UINT_VEC2,    glu::TYPE_UINT_VEC3,    glu::TYPE_UINT_VEC4,
        glu::TYPE_BOOL,         glu::TYPE_BOOL_VEC2,    glu::TYPE_BOOL_VEC3,    glu::TYPE_BOOL_VEC4,
        glu::TYPE_FLOAT_MAT2,   glu::TYPE_FLOAT_MAT3,   glu::TYPE_FLOAT_MAT4,   glu::TYPE_FLOAT_MAT2X3,
        glu::TYPE_FLOAT_MAT2X4, glu::TYPE_FLOAT_MAT3X2, glu::TYPE_FLOAT_MAT3X4, glu::TYPE_FLOAT_MAT4X2,
        glu::TYPE_FLOAT_MAT4X3};

    static const struct
    {
        const char *name;
        uint32_t flags;
    } layoutFlags[] = {
        {"shared", LAYOUT_SHARED}, {"packed", LAYOUT_PACKED}, {"std140", LAYOUT_STD140}, {"std430", LAYOUT_STD430}};

    static const struct
    {
        const char *name;
        uint32_t flags;
    } matrixFlags[] = {{"row_major", LAYOUT_ROW_MAJOR}, {"column_major", LAYOUT_COLUMN_MAJOR}};

    static const struct
    {
        const char *name;
        SSBOLayoutCase::BufferMode mode;
    } bufferModes[] = {{"per_block_buffer", SSBOLayoutCase::BUFFERMODE_PER_BLOCK},
                       {"single_buffer", SSBOLayoutCase::BUFFERMODE_SINGLE}};

    // ubo.single_basic_type
    {
        tcu::TestCaseGroup *singleBasicTypeGroup =
            new tcu::TestCaseGroup(m_testCtx, "single_basic_type", "Single basic variable in single buffer");
        addChild(singleBasicTypeGroup);

        for (int layoutFlagNdx = 0; layoutFlagNdx < DE_LENGTH_OF_ARRAY(layoutFlags); layoutFlagNdx++)
        {
            tcu::TestCaseGroup *layoutGroup = new tcu::TestCaseGroup(m_testCtx, layoutFlags[layoutFlagNdx].name, "");
            singleBasicTypeGroup->addChild(layoutGroup);

            for (int basicTypeNdx = 0; basicTypeNdx < DE_LENGTH_OF_ARRAY(basicTypes); basicTypeNdx++)
            {
                glu::DataType type   = basicTypes[basicTypeNdx];
                const char *typeName = glu::getDataTypeName(type);

                if (glu::isDataTypeBoolOrBVec(type))
                    layoutGroup->addChild(new BlockBasicTypeCase(m_context, typeName, "",
                                                                 VarType(type, glu::PRECISION_LAST),
                                                                 layoutFlags[layoutFlagNdx].flags, 0));
                else
                {
                    for (int precNdx = 0; precNdx < glu::PRECISION_LAST; precNdx++)
                    {
                        const glu::Precision precision = glu::Precision(precNdx);
                        const string caseName          = string(glu::getPrecisionName(precision)) + "_" + typeName;

                        layoutGroup->addChild(new BlockBasicTypeCase(m_context, caseName.c_str(), "",
                                                                     VarType(type, precision),
                                                                     layoutFlags[layoutFlagNdx].flags, 0));
                    }
                }

                if (glu::isDataTypeMatrix(type))
                {
                    for (int matFlagNdx = 0; matFlagNdx < DE_LENGTH_OF_ARRAY(matrixFlags); matFlagNdx++)
                    {
                        for (int precNdx = 0; precNdx < glu::PRECISION_LAST; precNdx++)
                        {
                            const glu::Precision precision = glu::Precision(precNdx);
                            const string caseName          = string(matrixFlags[matFlagNdx].name) + "_" +
                                                    string(glu::getPrecisionName(precision)) + "_" + typeName;

                            layoutGroup->addChild(new BlockBasicTypeCase(
                                m_context, caseName.c_str(), "", glu::VarType(type, precision),
                                layoutFlags[layoutFlagNdx].flags | matrixFlags[matFlagNdx].flags, 0));
                        }
                    }
                }
            }
        }
    }

    // ubo.single_basic_array
    {
        tcu::TestCaseGroup *singleBasicArrayGroup =
            new tcu::TestCaseGroup(m_testCtx, "single_basic_array", "Single basic array variable in single buffer");
        addChild(singleBasicArrayGroup);

        for (int layoutFlagNdx = 0; layoutFlagNdx < DE_LENGTH_OF_ARRAY(layoutFlags); layoutFlagNdx++)
        {
            tcu::TestCaseGroup *layoutGroup = new tcu::TestCaseGroup(m_testCtx, layoutFlags[layoutFlagNdx].name, "");
            singleBasicArrayGroup->addChild(layoutGroup);

            for (int basicTypeNdx = 0; basicTypeNdx < DE_LENGTH_OF_ARRAY(basicTypes); basicTypeNdx++)
            {
                glu::DataType type   = basicTypes[basicTypeNdx];
                const char *typeName = glu::getDataTypeName(type);
                const int arraySize  = 3;

                layoutGroup->addChild(new BlockBasicTypeCase(
                    m_context, typeName, "",
                    VarType(VarType(type, glu::isDataTypeBoolOrBVec(type) ? glu::PRECISION_LAST : glu::PRECISION_HIGHP),
                            arraySize),
                    layoutFlags[layoutFlagNdx].flags, 0));

                if (glu::isDataTypeMatrix(type))
                {
                    for (int matFlagNdx = 0; matFlagNdx < DE_LENGTH_OF_ARRAY(matrixFlags); matFlagNdx++)
                        layoutGroup->addChild(new BlockBasicTypeCase(
                            m_context, (string(matrixFlags[matFlagNdx].name) + "_" + typeName).c_str(), "",
                            VarType(VarType(type, glu::PRECISION_HIGHP), arraySize),
                            layoutFlags[layoutFlagNdx].flags | matrixFlags[matFlagNdx].flags, 0));
                }
            }
        }
    }

    // ubo.basic_unsized_array
    {
        tcu::TestCaseGroup *basicUnsizedArray =
            new tcu::TestCaseGroup(m_testCtx, "basic_unsized_array", "Basic unsized array tests");
        addChild(basicUnsizedArray);

        for (int layoutFlagNdx = 0; layoutFlagNdx < DE_LENGTH_OF_ARRAY(layoutFlags); layoutFlagNdx++)
        {
            tcu::TestCaseGroup *layoutGroup = new tcu::TestCaseGroup(m_testCtx, layoutFlags[layoutFlagNdx].name, "");
            basicUnsizedArray->addChild(layoutGroup);

            for (int basicTypeNdx = 0; basicTypeNdx < DE_LENGTH_OF_ARRAY(basicTypes); basicTypeNdx++)
            {
                glu::DataType type   = basicTypes[basicTypeNdx];
                const char *typeName = glu::getDataTypeName(type);
                const int arraySize  = 19;

                layoutGroup->addChild(new BlockBasicUnsizedArrayCase(
                    m_context, typeName, "",
                    VarType(type, glu::isDataTypeBoolOrBVec(type) ? glu::PRECISION_LAST : glu::PRECISION_HIGHP),
                    arraySize, layoutFlags[layoutFlagNdx].flags));

                if (glu::isDataTypeMatrix(type))
                {
                    for (int matFlagNdx = 0; matFlagNdx < DE_LENGTH_OF_ARRAY(matrixFlags); matFlagNdx++)
                        layoutGroup->addChild(new BlockBasicUnsizedArrayCase(
                            m_context, (string(matrixFlags[matFlagNdx].name) + "_" + typeName).c_str(), "",
                            VarType(type, glu::PRECISION_HIGHP), arraySize,
                            layoutFlags[layoutFlagNdx].flags | matrixFlags[matFlagNdx].flags));
                }
            }
        }
    }

    // ubo.2_level_array
    {
        tcu::TestCaseGroup *nestedArrayGroup =
            new tcu::TestCaseGroup(m_testCtx, "2_level_array", "2-level nested array");
        addChild(nestedArrayGroup);

        for (int layoutFlagNdx = 0; layoutFlagNdx < DE_LENGTH_OF_ARRAY(layoutFlags); layoutFlagNdx++)
        {
            tcu::TestCaseGroup *layoutGroup = new tcu::TestCaseGroup(m_testCtx, layoutFlags[layoutFlagNdx].name, "");
            nestedArrayGroup->addChild(layoutGroup);

            for (int basicTypeNdx = 0; basicTypeNdx < DE_LENGTH_OF_ARRAY(basicTypes); basicTypeNdx++)
            {
                glu::DataType type   = basicTypes[basicTypeNdx];
                const char *typeName = glu::getDataTypeName(type);
                const int childSize  = 3;
                const int parentSize = 4;
                const VarType childType(
                    VarType(type, glu::isDataTypeBoolOrBVec(type) ? glu::PRECISION_LAST : glu::PRECISION_HIGHP),
                    childSize);
                const VarType fullType(childType, parentSize);

                layoutGroup->addChild(
                    new BlockBasicTypeCase(m_context, typeName, "", fullType, layoutFlags[layoutFlagNdx].flags, 0));

                if (glu::isDataTypeMatrix(type))
                {
                    for (int matFlagNdx = 0; matFlagNdx < DE_LENGTH_OF_ARRAY(matrixFlags); matFlagNdx++)
                        layoutGroup->addChild(new BlockBasicTypeCase(
                            m_context, (string(matrixFlags[matFlagNdx].name) + "_" + typeName).c_str(), "", fullType,
                            layoutFlags[layoutFlagNdx].flags | matrixFlags[matFlagNdx].flags, 0));
                }
            }
        }
    }

    // ubo.3_level_array
    {
        tcu::TestCaseGroup *nestedArrayGroup =
            new tcu::TestCaseGroup(m_testCtx, "3_level_array", "3-level nested array");
        addChild(nestedArrayGroup);

        for (int layoutFlagNdx = 0; layoutFlagNdx < DE_LENGTH_OF_ARRAY(layoutFlags); layoutFlagNdx++)
        {
            tcu::TestCaseGroup *layoutGroup = new tcu::TestCaseGroup(m_testCtx, layoutFlags[layoutFlagNdx].name, "");
            nestedArrayGroup->addChild(layoutGroup);

            for (int basicTypeNdx = 0; basicTypeNdx < DE_LENGTH_OF_ARRAY(basicTypes); basicTypeNdx++)
            {
                glu::DataType type   = basicTypes[basicTypeNdx];
                const char *typeName = glu::getDataTypeName(type);
                const int childSize0 = 3;
                const int childSize1 = 2;
                const int parentSize = 4;
                const VarType childType0(
                    VarType(type, glu::isDataTypeBoolOrBVec(type) ? glu::PRECISION_LAST : glu::PRECISION_HIGHP),
                    childSize0);
                const VarType childType1(childType0, childSize1);
                const VarType fullType(childType1, parentSize);

                layoutGroup->addChild(
                    new BlockBasicTypeCase(m_context, typeName, "", fullType, layoutFlags[layoutFlagNdx].flags, 0));

                if (glu::isDataTypeMatrix(type))
                {
                    for (int matFlagNdx = 0; matFlagNdx < DE_LENGTH_OF_ARRAY(matrixFlags); matFlagNdx++)
                        layoutGroup->addChild(new BlockBasicTypeCase(
                            m_context, (string(matrixFlags[matFlagNdx].name) + "_" + typeName).c_str(), "", fullType,
                            layoutFlags[layoutFlagNdx].flags | matrixFlags[matFlagNdx].flags, 0));
                }
            }
        }
    }

    // ubo.3_level_unsized_array
    {
        tcu::TestCaseGroup *nestedArrayGroup =
            new tcu::TestCaseGroup(m_testCtx, "3_level_unsized_array", "3-level nested array, top-level array unsized");
        addChild(nestedArrayGroup);

        for (int layoutFlagNdx = 0; layoutFlagNdx < DE_LENGTH_OF_ARRAY(layoutFlags); layoutFlagNdx++)
        {
            tcu::TestCaseGroup *layoutGroup = new tcu::TestCaseGroup(m_testCtx, layoutFlags[layoutFlagNdx].name, "");
            nestedArrayGroup->addChild(layoutGroup);

            for (int basicTypeNdx = 0; basicTypeNdx < DE_LENGTH_OF_ARRAY(basicTypes); basicTypeNdx++)
            {
                glu::DataType type   = basicTypes[basicTypeNdx];
                const char *typeName = glu::getDataTypeName(type);
                const int childSize0 = 2;
                const int childSize1 = 4;
                const int parentSize = 3;
                const VarType childType0(
                    VarType(type, glu::isDataTypeBoolOrBVec(type) ? glu::PRECISION_LAST : glu::PRECISION_HIGHP),
                    childSize0);
                const VarType childType1(childType0, childSize1);

                layoutGroup->addChild(new BlockBasicUnsizedArrayCase(m_context, typeName, "", childType1, parentSize,
                                                                     layoutFlags[layoutFlagNdx].flags));

                if (glu::isDataTypeMatrix(type))
                {
                    for (int matFlagNdx = 0; matFlagNdx < DE_LENGTH_OF_ARRAY(matrixFlags); matFlagNdx++)
                        layoutGroup->addChild(new BlockBasicUnsizedArrayCase(
                            m_context, (string(matrixFlags[matFlagNdx].name) + "_" + typeName).c_str(), "", childType1,
                            parentSize, layoutFlags[layoutFlagNdx].flags | matrixFlags[matFlagNdx].flags));
                }
            }
        }
    }

    // ubo.single_struct
    {
        tcu::TestCaseGroup *singleStructGroup =
            new tcu::TestCaseGroup(m_testCtx, "single_struct", "Single struct in uniform block");
        addChild(singleStructGroup);

        for (int modeNdx = 0; modeNdx < DE_LENGTH_OF_ARRAY(bufferModes); modeNdx++)
        {
            tcu::TestCaseGroup *modeGroup = new tcu::TestCaseGroup(m_testCtx, bufferModes[modeNdx].name, "");
            singleStructGroup->addChild(modeGroup);

            for (int layoutFlagNdx = 0; layoutFlagNdx < DE_LENGTH_OF_ARRAY(layoutFlags); layoutFlagNdx++)
            {
                for (int isArray = 0; isArray < 2; isArray++)
                {
                    const uint32_t caseFlags = layoutFlags[layoutFlagNdx].flags;
                    string caseName          = layoutFlags[layoutFlagNdx].name;

                    if (bufferModes[modeNdx].mode == SSBOLayoutCase::BUFFERMODE_SINGLE && isArray == 0)
                        continue; // Doesn't make sense to add this variant.

                    if (isArray)
                        caseName += "_instance_array";

                    modeGroup->addChild(new BlockSingleStructCase(m_context, caseName.c_str(), "", caseFlags,
                                                                  bufferModes[modeNdx].mode, isArray ? 3 : 0));
                }
            }
        }
    }

    // ubo.single_struct_array
    {
        tcu::TestCaseGroup *singleStructArrayGroup =
            new tcu::TestCaseGroup(m_testCtx, "single_struct_array", "Struct array in one uniform block");
        addChild(singleStructArrayGroup);

        for (int modeNdx = 0; modeNdx < DE_LENGTH_OF_ARRAY(bufferModes); modeNdx++)
        {
            tcu::TestCaseGroup *modeGroup = new tcu::TestCaseGroup(m_testCtx, bufferModes[modeNdx].name, "");
            singleStructArrayGroup->addChild(modeGroup);

            for (int layoutFlagNdx = 0; layoutFlagNdx < DE_LENGTH_OF_ARRAY(layoutFlags); layoutFlagNdx++)
            {
                for (int isArray = 0; isArray < 2; isArray++)
                {
                    std::string baseName = layoutFlags[layoutFlagNdx].name;
                    uint32_t baseFlags   = layoutFlags[layoutFlagNdx].flags;

                    if (bufferModes[modeNdx].mode == SSBOLayoutCase::BUFFERMODE_SINGLE && isArray == 0)
                        continue; // Doesn't make sense to add this variant.

                    if (isArray)
                        baseName += "_instance_array";

                    modeGroup->addChild(new BlockSingleStructArrayCase(m_context, baseName.c_str(), "", baseFlags,
                                                                       bufferModes[modeNdx].mode, isArray ? 3 : 0));
                }
            }
        }
    }

    // ubo.single_nested_struct
    {
        tcu::TestCaseGroup *singleNestedStructGroup =
            new tcu::TestCaseGroup(m_testCtx, "single_nested_struct", "Nested struct in one uniform block");
        addChild(singleNestedStructGroup);

        for (int modeNdx = 0; modeNdx < DE_LENGTH_OF_ARRAY(bufferModes); modeNdx++)
        {
            tcu::TestCaseGroup *modeGroup = new tcu::TestCaseGroup(m_testCtx, bufferModes[modeNdx].name, "");
            singleNestedStructGroup->addChild(modeGroup);

            for (int layoutFlagNdx = 0; layoutFlagNdx < DE_LENGTH_OF_ARRAY(layoutFlags); layoutFlagNdx++)
            {
                for (int isArray = 0; isArray < 2; isArray++)
                {
                    std::string baseName = layoutFlags[layoutFlagNdx].name;
                    uint32_t baseFlags   = layoutFlags[layoutFlagNdx].flags;

                    if (bufferModes[modeNdx].mode == SSBOLayoutCase::BUFFERMODE_SINGLE && isArray == 0)
                        continue; // Doesn't make sense to add this variant.

                    if (isArray)
                        baseName += "_instance_array";

                    modeGroup->addChild(new BlockSingleNestedStructCase(m_context, baseName.c_str(), "", baseFlags,
                                                                        bufferModes[modeNdx].mode, isArray ? 3 : 0));
                }
            }
        }
    }

    // ubo.single_nested_struct_array
    {
        tcu::TestCaseGroup *singleNestedStructArrayGroup =
            new tcu::TestCaseGroup(m_testCtx, "single_nested_struct_array", "Nested struct array in one uniform block");
        addChild(singleNestedStructArrayGroup);

        for (int modeNdx = 0; modeNdx < DE_LENGTH_OF_ARRAY(bufferModes); modeNdx++)
        {
            tcu::TestCaseGroup *modeGroup = new tcu::TestCaseGroup(m_testCtx, bufferModes[modeNdx].name, "");
            singleNestedStructArrayGroup->addChild(modeGroup);

            for (int layoutFlagNdx = 0; layoutFlagNdx < DE_LENGTH_OF_ARRAY(layoutFlags); layoutFlagNdx++)
            {
                for (int isArray = 0; isArray < 2; isArray++)
                {
                    std::string baseName = layoutFlags[layoutFlagNdx].name;
                    uint32_t baseFlags   = layoutFlags[layoutFlagNdx].flags;

                    if (bufferModes[modeNdx].mode == SSBOLayoutCase::BUFFERMODE_SINGLE && isArray == 0)
                        continue; // Doesn't make sense to add this variant.

                    if (isArray)
                        baseName += "_instance_array";

                    modeGroup->addChild(new BlockSingleNestedStructArrayCase(
                        m_context, baseName.c_str(), "", baseFlags, bufferModes[modeNdx].mode, isArray ? 3 : 0));
                }
            }
        }
    }

    // ubo.unsized_struct_array
    {
        tcu::TestCaseGroup *singleStructArrayGroup =
            new tcu::TestCaseGroup(m_testCtx, "unsized_struct_array", "Unsized struct array in one uniform block");
        addChild(singleStructArrayGroup);

        for (int modeNdx = 0; modeNdx < DE_LENGTH_OF_ARRAY(bufferModes); modeNdx++)
        {
            tcu::TestCaseGroup *modeGroup = new tcu::TestCaseGroup(m_testCtx, bufferModes[modeNdx].name, "");
            singleStructArrayGroup->addChild(modeGroup);

            for (int layoutFlagNdx = 0; layoutFlagNdx < DE_LENGTH_OF_ARRAY(layoutFlags); layoutFlagNdx++)
            {
                for (int isArray = 0; isArray < 2; isArray++)
                {
                    std::string baseName = layoutFlags[layoutFlagNdx].name;
                    uint32_t baseFlags   = layoutFlags[layoutFlagNdx].flags;

                    if (bufferModes[modeNdx].mode == SSBOLayoutCase::BUFFERMODE_SINGLE && isArray == 0)
                        continue; // Doesn't make sense to add this variant.

                    if (isArray)
                        baseName += "_instance_array";

                    modeGroup->addChild(new BlockUnsizedStructArrayCase(m_context, baseName.c_str(), "", baseFlags,
                                                                        bufferModes[modeNdx].mode, isArray ? 3 : 0));
                }
            }
        }
    }

    // ubo.2_level_unsized_struct_array
    {
        tcu::TestCaseGroup *structArrayGroup = new tcu::TestCaseGroup(
            m_testCtx, "2_level_unsized_struct_array", "Unsized 2-level struct array in one uniform block");
        addChild(structArrayGroup);

        for (int modeNdx = 0; modeNdx < DE_LENGTH_OF_ARRAY(bufferModes); modeNdx++)
        {
            tcu::TestCaseGroup *modeGroup = new tcu::TestCaseGroup(m_testCtx, bufferModes[modeNdx].name, "");
            structArrayGroup->addChild(modeGroup);

            for (int layoutFlagNdx = 0; layoutFlagNdx < DE_LENGTH_OF_ARRAY(layoutFlags); layoutFlagNdx++)
            {
                for (int isArray = 0; isArray < 2; isArray++)
                {
                    std::string baseName = layoutFlags[layoutFlagNdx].name;
                    uint32_t baseFlags   = layoutFlags[layoutFlagNdx].flags;

                    if (bufferModes[modeNdx].mode == SSBOLayoutCase::BUFFERMODE_SINGLE && isArray == 0)
                        continue; // Doesn't make sense to add this variant.

                    if (isArray)
                        baseName += "_instance_array";

                    modeGroup->addChild(new Block2LevelUnsizedStructArrayCase(
                        m_context, baseName.c_str(), "", baseFlags, bufferModes[modeNdx].mode, isArray ? 3 : 0));
                }
            }
        }
    }

    // ubo.unsized_nested_struct_array
    {
        tcu::TestCaseGroup *singleNestedStructArrayGroup = new tcu::TestCaseGroup(
            m_testCtx, "unsized_nested_struct_array", "Unsized, nested struct array in one uniform block");
        addChild(singleNestedStructArrayGroup);

        for (int modeNdx = 0; modeNdx < DE_LENGTH_OF_ARRAY(bufferModes); modeNdx++)
        {
            tcu::TestCaseGroup *modeGroup = new tcu::TestCaseGroup(m_testCtx, bufferModes[modeNdx].name, "");
            singleNestedStructArrayGroup->addChild(modeGroup);

            for (int layoutFlagNdx = 0; layoutFlagNdx < DE_LENGTH_OF_ARRAY(layoutFlags); layoutFlagNdx++)
            {
                for (int isArray = 0; isArray < 2; isArray++)
                {
                    std::string baseName = layoutFlags[layoutFlagNdx].name;
                    uint32_t baseFlags   = layoutFlags[layoutFlagNdx].flags;

                    if (bufferModes[modeNdx].mode == SSBOLayoutCase::BUFFERMODE_SINGLE && isArray == 0)
                        continue; // Doesn't make sense to add this variant.

                    if (isArray)
                        baseName += "_instance_array";

                    modeGroup->addChild(new BlockUnsizedNestedStructArrayCase(
                        m_context, baseName.c_str(), "", baseFlags, bufferModes[modeNdx].mode, isArray ? 3 : 0));
                }
            }
        }
    }

    // ubo.instance_array_basic_type
    {
        tcu::TestCaseGroup *instanceArrayBasicTypeGroup =
            new tcu::TestCaseGroup(m_testCtx, "instance_array_basic_type", "Single basic variable in instance array");
        addChild(instanceArrayBasicTypeGroup);

        for (int layoutFlagNdx = 0; layoutFlagNdx < DE_LENGTH_OF_ARRAY(layoutFlags); layoutFlagNdx++)
        {
            tcu::TestCaseGroup *layoutGroup = new tcu::TestCaseGroup(m_testCtx, layoutFlags[layoutFlagNdx].name, "");
            instanceArrayBasicTypeGroup->addChild(layoutGroup);

            for (int basicTypeNdx = 0; basicTypeNdx < DE_LENGTH_OF_ARRAY(basicTypes); basicTypeNdx++)
            {
                glu::DataType type     = basicTypes[basicTypeNdx];
                const char *typeName   = glu::getDataTypeName(type);
                const int numInstances = 3;

                layoutGroup->addChild(new BlockBasicTypeCase(
                    m_context, typeName, "",
                    VarType(type, glu::isDataTypeBoolOrBVec(type) ? glu::PRECISION_LAST : glu::PRECISION_HIGHP),
                    layoutFlags[layoutFlagNdx].flags, numInstances));

                if (glu::isDataTypeMatrix(type))
                {
                    for (int matFlagNdx = 0; matFlagNdx < DE_LENGTH_OF_ARRAY(matrixFlags); matFlagNdx++)
                        layoutGroup->addChild(new BlockBasicTypeCase(
                            m_context, (string(matrixFlags[matFlagNdx].name) + "_" + typeName).c_str(), "",
                            VarType(type, glu::PRECISION_HIGHP),
                            layoutFlags[layoutFlagNdx].flags | matrixFlags[matFlagNdx].flags, numInstances));
                }
            }
        }
    }

    // ubo.multi_basic_types
    {
        tcu::TestCaseGroup *multiBasicTypesGroup =
            new tcu::TestCaseGroup(m_testCtx, "multi_basic_types", "Multiple buffers with basic types");
        addChild(multiBasicTypesGroup);

        for (int modeNdx = 0; modeNdx < DE_LENGTH_OF_ARRAY(bufferModes); modeNdx++)
        {
            tcu::TestCaseGroup *modeGroup = new tcu::TestCaseGroup(m_testCtx, bufferModes[modeNdx].name, "");
            multiBasicTypesGroup->addChild(modeGroup);

            for (int layoutFlagNdx = 0; layoutFlagNdx < DE_LENGTH_OF_ARRAY(layoutFlags); layoutFlagNdx++)
            {
                for (int isArray = 0; isArray < 2; isArray++)
                {
                    std::string baseName = layoutFlags[layoutFlagNdx].name;
                    uint32_t baseFlags   = layoutFlags[layoutFlagNdx].flags;

                    if (isArray)
                        baseName += "_instance_array";

                    modeGroup->addChild(new BlockMultiBasicTypesCase(m_context, baseName.c_str(), "", baseFlags,
                                                                     baseFlags, bufferModes[modeNdx].mode,
                                                                     isArray ? 3 : 0));
                }
            }
        }
    }

    // ubo.multi_nested_struct
    {
        tcu::TestCaseGroup *multiNestedStructGroup =
            new tcu::TestCaseGroup(m_testCtx, "multi_nested_struct", "Multiple buffers with nested structs");
        addChild(multiNestedStructGroup);

        for (int modeNdx = 0; modeNdx < DE_LENGTH_OF_ARRAY(bufferModes); modeNdx++)
        {
            tcu::TestCaseGroup *modeGroup = new tcu::TestCaseGroup(m_testCtx, bufferModes[modeNdx].name, "");
            multiNestedStructGroup->addChild(modeGroup);

            for (int layoutFlagNdx = 0; layoutFlagNdx < DE_LENGTH_OF_ARRAY(layoutFlags); layoutFlagNdx++)
            {
                for (int isArray = 0; isArray < 2; isArray++)
                {
                    std::string baseName = layoutFlags[layoutFlagNdx].name;
                    uint32_t baseFlags   = layoutFlags[layoutFlagNdx].flags;

                    if (isArray)
                        baseName += "_instance_array";

                    modeGroup->addChild(new BlockMultiNestedStructCase(m_context, baseName.c_str(), "", baseFlags,
                                                                       baseFlags, bufferModes[modeNdx].mode,
                                                                       isArray ? 3 : 0));
                }
            }
        }
    }

    // ubo.random
    {
        const uint32_t allLayouts    = FEATURE_PACKED_LAYOUT | FEATURE_SHARED_LAYOUT | FEATURE_STD140_LAYOUT;
        const uint32_t allBasicTypes = FEATURE_VECTORS | FEATURE_MATRICES;
        const uint32_t unused        = FEATURE_UNUSED_MEMBERS | FEATURE_UNUSED_VARS;
        const uint32_t unsized       = FEATURE_UNSIZED_ARRAYS;
        const uint32_t matFlags      = FEATURE_MATRIX_LAYOUT;

        tcu::TestCaseGroup *randomGroup = new tcu::TestCaseGroup(m_testCtx, "random", "Random Uniform Block cases");
        addChild(randomGroup);

        // Basic types.
        createRandomCaseGroup(randomGroup, m_context, "scalar_types", "Scalar types only, per-block buffers",
                              SSBOLayoutCase::BUFFERMODE_PER_BLOCK, allLayouts | unused, 25, 0);
        createRandomCaseGroup(randomGroup, m_context, "vector_types", "Scalar and vector types only, per-block buffers",
                              SSBOLayoutCase::BUFFERMODE_PER_BLOCK, allLayouts | unused | FEATURE_VECTORS, 25, 25);
        createRandomCaseGroup(randomGroup, m_context, "basic_types", "All basic types, per-block buffers",
                              SSBOLayoutCase::BUFFERMODE_PER_BLOCK, allLayouts | unused | allBasicTypes | matFlags, 25,
                              50);
        createRandomCaseGroup(randomGroup, m_context, "basic_arrays", "Arrays, per-block buffers",
                              SSBOLayoutCase::BUFFERMODE_PER_BLOCK,
                              allLayouts | unused | allBasicTypes | matFlags | FEATURE_ARRAYS, 25, 50);
        createRandomCaseGroup(randomGroup, m_context, "unsized_arrays", "Unsized arrays, per-block buffers",
                              SSBOLayoutCase::BUFFERMODE_PER_BLOCK,
                              allLayouts | unused | allBasicTypes | matFlags | unsized | FEATURE_ARRAYS, 25, 50);
        createRandomCaseGroup(randomGroup, m_context, "arrays_of_arrays", "Arrays of arrays, per-block buffers",
                              SSBOLayoutCase::BUFFERMODE_PER_BLOCK,
                              allLayouts | unused | allBasicTypes | matFlags | unsized | FEATURE_ARRAYS |
                                  FEATURE_ARRAYS_OF_ARRAYS,
                              25, 950);

        createRandomCaseGroup(randomGroup, m_context, "basic_instance_arrays",
                              "Basic instance arrays, per-block buffers", SSBOLayoutCase::BUFFERMODE_PER_BLOCK,
                              allLayouts | unused | allBasicTypes | matFlags | unsized | FEATURE_INSTANCE_ARRAYS, 25,
                              75);
        createRandomCaseGroup(randomGroup, m_context, "nested_structs", "Nested structs, per-block buffers",
                              SSBOLayoutCase::BUFFERMODE_PER_BLOCK,
                              allLayouts | unused | allBasicTypes | matFlags | unsized | FEATURE_STRUCTS, 25, 100);
        createRandomCaseGroup(randomGroup, m_context, "nested_structs_arrays",
                              "Nested structs, arrays, per-block buffers", SSBOLayoutCase::BUFFERMODE_PER_BLOCK,
                              allLayouts | unused | allBasicTypes | matFlags | unsized | FEATURE_STRUCTS |
                                  FEATURE_ARRAYS | FEATURE_ARRAYS_OF_ARRAYS,
                              25, 150);
        createRandomCaseGroup(
            randomGroup, m_context, "nested_structs_instance_arrays",
            "Nested structs, instance arrays, per-block buffers", SSBOLayoutCase::BUFFERMODE_PER_BLOCK,
            allLayouts | unused | allBasicTypes | matFlags | unsized | FEATURE_STRUCTS | FEATURE_INSTANCE_ARRAYS, 25,
            125);
        createRandomCaseGroup(randomGroup, m_context, "nested_structs_arrays_instance_arrays",
                              "Nested structs, instance arrays, per-block buffers",
                              SSBOLayoutCase::BUFFERMODE_PER_BLOCK,
                              allLayouts | unused | allBasicTypes | matFlags | unsized | FEATURE_STRUCTS |
                                  FEATURE_ARRAYS | FEATURE_ARRAYS_OF_ARRAYS | FEATURE_INSTANCE_ARRAYS,
                              25, 175);

        createRandomCaseGroup(randomGroup, m_context, "all_per_block_buffers", "All random features, per-block buffers",
                              SSBOLayoutCase::BUFFERMODE_PER_BLOCK, ~0u, 50, 200);
        createRandomCaseGroup(randomGroup, m_context, "all_shared_buffer", "All random features, shared buffer",
                              SSBOLayoutCase::BUFFERMODE_SINGLE, ~0u, 50, 250);
    }
}

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