AttributeLayoutTest.cpp

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Author : Jiacheng Lu
Date : 2019-07-24 10:39:40
Hash : 7c8928d0
Message : Add more tests covering gl::vertexAttribPointer 1. Add tests ensuring VBO binding with format requiring conversion in vulkan backend is converted correctly after binding and offset changes. 2. Add tests ensuring VBO binding switching between CPU and GPU handles correctly in vulkan. As for vulkan, it transfers CPU side memory into tightly packed buffer and may causing a stride change. Bug: angleproject:3256 Change-Id: I5d9d78670b28bec286b96d3b6a9c6211da3f3d9b Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1716614 Commit-Queue: Jiacheng Lu <lujc@google.com> Reviewed-by: Jamie Madill <jmadill@chromium.org>
src/tests/gl_tests/AttributeLayoutTest.cpp
//
// Copyright 2018 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// AttributeLayoutTest:
//   Test various layouts of vertex attribute data:
//   - in memory, in buffer object, or combination of both
//   - sequential or interleaved
//   - various combinations of data types

#include <vector>

#include "test_utils/ANGLETest.h"
#include "test_utils/gl_raii.h"

using namespace angle;

namespace
{

// Test will draw these four triangles.
// clang-format off
constexpr double kTriangleData[] = {
    // xy       rgb
    0,0,        1,1,0,
    -1,+1,      1,1,0,
    +1,+1,      1,1,0,

    0,0,        0,1,0,
    +1,+1,      0,1,0,
    +1,-1,      0,1,0,

    0,0,        0,1,1,
    +1,-1,      0,1,1,
    -1,-1,      0,1,1,

    0,0,        1,0,1,
    -1,-1,      1,0,1,
    -1,+1,      1,0,1,
};
// clang-format on

constexpr size_t kNumVertices = ArraySize(kTriangleData) / 5;

// Vertex data source description.
class VertexData
{
  public:
    VertexData(int dimension, const double *data, unsigned offset, unsigned stride)
        : mDimension(dimension), mData(data), mOffset(offset), mStride(stride)
    {}
    int getDimension() const { return mDimension; }
    double getValue(unsigned vertexNumber, int component) const
    {
        return mData[mOffset + mStride * vertexNumber + component];
    }

  private:
    int mDimension;
    const double *mData;
    // offset and stride in doubles
    unsigned mOffset;
    unsigned mStride;
};

// A container for one or more vertex attributes.
class Container
{
  public:
    static constexpr size_t kSize = 1024;

    void open(void) { memset(mMemory, 0xff, kSize); }
    void *getDestination(size_t offset) { return mMemory + offset; }
    virtual void close(void) {}
    virtual ~Container() {}
    virtual const char *getAddress() = 0;
    virtual GLuint getBuffer()       = 0;

  protected:
    char mMemory[kSize];
};

// Vertex attribute data in client memory.
class Memory : public Container
{
  public:
    const char *getAddress() override { return mMemory; }
    GLuint getBuffer() override { return 0; }
};

// Vertex attribute data in buffer object.
class Buffer : public Container
{
  public:
    void close(void) override
    {
        glBindBuffer(GL_ARRAY_BUFFER, mBuffer);
        glBufferData(GL_ARRAY_BUFFER, sizeof(mMemory), mMemory, GL_STATIC_DRAW);
    }

    const char *getAddress() override { return nullptr; }
    GLuint getBuffer() override { return mBuffer; }

  protected:
    GLBuffer mBuffer;
};

// Encapsulate the storage, layout, format and data of a vertex attribute.
struct Attrib
{
    void openContainer(void) const { mContainer->open(); }

    void fillContainer(void) const
    {
        for (unsigned i = 0; i < kNumVertices; ++i)
        {
            for (int j = 0; j < mData.getDimension(); ++j)
            {
                size_t destOffset = mOffset + mStride * i + mCTypeSize * j;
                if (destOffset + mCTypeSize > Container::kSize)
                    FAIL() << "test case does not fit container";

                double value = mData.getValue(i, j);
                if (mGLType == GL_FIXED)
                    value *= 1 << 16;
                else if (mNormalized)
                {
                    if (value < mMinIn || value > mMaxIn)
                        FAIL() << "test data does not fit format";
                    value = (value - mMinIn) * mScale + mMinOut;
                }

                mStore(value, mContainer->getDestination(destOffset));
            }
        }
    }

    void closeContainer(void) const { mContainer->close(); }

    void enable(unsigned index) const
    {
        glBindBuffer(GL_ARRAY_BUFFER, mContainer->getBuffer());
        glVertexAttribPointer(index, mData.getDimension(), mGLType, mNormalized, mStride,
                              mContainer->getAddress() + mOffset);
        EXPECT_GL_NO_ERROR();
        glEnableVertexAttribArray(index);
    }

    bool inClientMemory(void) const { return mContainer->getAddress() != nullptr; }

    std::shared_ptr<Container> mContainer;
    unsigned mOffset;
    unsigned mStride;
    const VertexData &mData;
    void (*mStore)(double value, void *dest);
    GLenum mGLType;
    GLboolean mNormalized;
    size_t mCTypeSize;
    double mMinIn;
    double mMaxIn;
    double mMinOut;
    double mScale;
};

// Change type and store.
template <class T>
void Store(double value, void *dest)
{
    T v = static_cast<T>(value);
    memcpy(dest, &v, sizeof(v));
}

// Function object that makes Attrib structs according to a vertex format.
template <class CType, GLenum GLType, bool Normalized>
class Format
{
    static_assert(!(Normalized && GLType == GL_FLOAT), "Normalized float does not make sense.");

  public:
    Format(bool es3) : mES3(es3) {}

    Attrib operator()(std::shared_ptr<Container> container,
                      unsigned offset,
                      unsigned stride,
                      const VertexData &data) const
    {
        double minIn    = 0;
        double maxIn    = 1;
        double minOut   = std::numeric_limits<CType>::min();
        double rangeOut = std::numeric_limits<CType>::max() - minOut;

        if (std::is_signed<CType>::value)
        {
            minIn = -1;
            maxIn = +1;
            if (mES3)
            {
                minOut += 1;
                rangeOut -= 1;
            }
        }

        return {
            container,  offset,        stride, data,  Store<CType>, GLType,
            Normalized, sizeof(CType), minIn,  maxIn, minOut,       rangeOut / (maxIn - minIn),
        };
    }

  protected:
    const bool mES3;
};

typedef std::vector<Attrib> TestCase;

void PrepareTestCase(const TestCase &tc)
{
    for (const Attrib &a : tc)
        a.openContainer();
    for (const Attrib &a : tc)
        a.fillContainer();
    for (const Attrib &a : tc)
        a.closeContainer();
    unsigned i = 0;
    for (const Attrib &a : tc)
        a.enable(i++);
}

class AttributeLayoutTest : public ANGLETest
{
  protected:
    AttributeLayoutTest()
        : mProgram(0), mCoord(2, kTriangleData, 0, 5), mColor(3, kTriangleData, 2, 5)
    {
        setWindowWidth(128);
        setWindowHeight(128);
        setConfigRedBits(8);
        setConfigGreenBits(8);
        setConfigBlueBits(8);
        setConfigAlphaBits(8);
    }

    void GetTestCases(void);

    void testSetUp() override
    {
        glClearColor(.2f, .2f, .2f, .0f);
        glClear(GL_COLOR_BUFFER_BIT);

        glDisable(GL_DEPTH_TEST);

        constexpr char kVS[] =
            "attribute mediump vec2 coord;\n"
            "attribute mediump vec3 color;\n"
            "varying mediump vec3 vcolor;\n"
            "void main(void)\n"
            "{\n"
            "    gl_Position = vec4(coord, 0, 1);\n"
            "    vcolor = color;\n"
            "}\n";

        constexpr char kFS[] =
            "varying mediump vec3 vcolor;\n"
            "void main(void)\n"
            "{\n"
            "    gl_FragColor = vec4(vcolor, 0);\n"
            "}\n";

        mProgram = CompileProgram(kVS, kFS);
        ASSERT_NE(0u, mProgram);
        glUseProgram(mProgram);

        glGenBuffers(1, &mIndexBuffer);

        GetTestCases();
    }

    void testTearDown() override
    {
        mTestCases.clear();
        glDeleteProgram(mProgram);
        glDeleteBuffers(1, &mIndexBuffer);
    }

    virtual bool Skip(const TestCase &) { return false; }
    virtual void Draw(int firstVertex, unsigned vertexCount, const GLushort *indices) = 0;

    void Run(bool drawFirstTriangle)
    {
        glViewport(0, 0, getWindowWidth(), getWindowHeight());
        glUseProgram(mProgram);

        for (unsigned i = 0; i < mTestCases.size(); ++i)
        {
            if (mTestCases[i].size() == 0 || Skip(mTestCases[i]))
                continue;

            PrepareTestCase(mTestCases[i]);

            glClear(GL_COLOR_BUFFER_BIT);

            std::string testCase;
            if (drawFirstTriangle)
            {
                Draw(0, kNumVertices, mIndices);
                testCase = "draw";
            }
            else
            {
                Draw(3, kNumVertices - 3, mIndices + 3);
                testCase = "skip";
            }

            testCase += " first triangle case ";
            int w = getWindowWidth() / 4;
            int h = getWindowHeight() / 4;
            if (drawFirstTriangle)
            {
                EXPECT_PIXEL_EQ(w * 2, h * 3, 255, 255, 0, 0) << testCase << i;
            }
            else
            {
                EXPECT_PIXEL_EQ(w * 2, h * 3, 51, 51, 51, 0) << testCase << i;
            }
            EXPECT_PIXEL_EQ(w * 3, h * 2, 0, 255, 0, 0) << testCase << i;
            EXPECT_PIXEL_EQ(w * 2, h * 1, 0, 255, 255, 0) << testCase << i;
            EXPECT_PIXEL_EQ(w * 1, h * 2, 255, 0, 255, 0) << testCase << i;
        }
    }

    static const GLushort mIndices[kNumVertices];

    GLuint mProgram;
    GLuint mIndexBuffer;

    std::vector<TestCase> mTestCases;

    VertexData mCoord;
    VertexData mColor;
};
const GLushort AttributeLayoutTest::mIndices[kNumVertices] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11};

void AttributeLayoutTest::GetTestCases(void)
{
    const bool es3 = getClientMajorVersion() >= 3;

    Format<GLfloat, GL_FLOAT, false> Float(es3);
    Format<GLint, GL_FIXED, false> Fixed(es3);

    Format<GLbyte, GL_BYTE, false> SByte(es3);
    Format<GLubyte, GL_UNSIGNED_BYTE, false> UByte(es3);
    Format<GLshort, GL_SHORT, false> SShort(es3);
    Format<GLushort, GL_UNSIGNED_SHORT, false> UShort(es3);
    Format<GLint, GL_INT, false> SInt(es3);
    Format<GLuint, GL_UNSIGNED_INT, false> UInt(es3);

    Format<GLbyte, GL_BYTE, true> NormSByte(es3);
    Format<GLubyte, GL_UNSIGNED_BYTE, true> NormUByte(es3);
    Format<GLshort, GL_SHORT, true> NormSShort(es3);
    Format<GLushort, GL_UNSIGNED_SHORT, true> NormUShort(es3);
    Format<GLint, GL_INT, true> NormSInt(es3);
    Format<GLuint, GL_UNSIGNED_INT, true> NormUInt(es3);

    std::shared_ptr<Container> M0 = std::make_shared<Memory>();
    std::shared_ptr<Container> M1 = std::make_shared<Memory>();
    std::shared_ptr<Container> B0 = std::make_shared<Buffer>();
    std::shared_ptr<Container> B1 = std::make_shared<Buffer>();

    // 0. two buffers
    mTestCases.push_back({Float(B0, 0, 8, mCoord), Float(B1, 0, 12, mColor)});

    // 1. two memory
    mTestCases.push_back({Float(M0, 0, 8, mCoord), Float(M1, 0, 12, mColor)});

    // 2. one memory, sequential
    mTestCases.push_back({Float(M0, 0, 8, mCoord), Float(M0, 96, 12, mColor)});

    // 3. one memory, interleaved
    mTestCases.push_back({Float(M0, 0, 20, mCoord), Float(M0, 8, 20, mColor)});

    // 4. buffer and memory
    mTestCases.push_back({Float(B0, 0, 8, mCoord), Float(M0, 0, 12, mColor)});

    // 5. stride != size
    mTestCases.push_back({Float(B0, 0, 16, mCoord), Float(B1, 0, 12, mColor)});

    // 6-7. same stride and format, switching data between memory and buffer
    mTestCases.push_back({Float(M0, 0, 16, mCoord), Float(M1, 0, 12, mColor)});
    mTestCases.push_back({Float(B0, 0, 16, mCoord), Float(B1, 0, 12, mColor)});

    // 8-9. same stride and format, offset change
    mTestCases.push_back({Float(B0, 0, 8, mCoord), Float(B1, 0, 12, mColor)});
    mTestCases.push_back({Float(B0, 3, 8, mCoord), Float(B1, 4, 12, mColor)});

    // 10-11. unaligned buffer data
    mTestCases.push_back({Float(M0, 0, 8, mCoord), Float(B0, 1, 13, mColor)});
    mTestCases.push_back({Float(M0, 0, 8, mCoord), Float(B1, 1, 13, mColor)});

    // 12-15. byte/short
    mTestCases.push_back({SByte(M0, 0, 20, mCoord), UByte(M0, 10, 20, mColor)});
    mTestCases.push_back({SShort(M0, 0, 20, mCoord), UShort(M0, 8, 20, mColor)});
    mTestCases.push_back({NormSByte(M0, 0, 8, mCoord), NormUByte(M0, 4, 8, mColor)});
    mTestCases.push_back({NormSShort(M0, 0, 20, mCoord), NormUShort(M0, 8, 20, mColor)});

    // 16. one buffer, sequential
    mTestCases.push_back({Fixed(B0, 0, 8, mCoord), Float(B0, 96, 12, mColor)});

    // 17. one buffer, interleaved
    mTestCases.push_back({Fixed(B0, 0, 20, mCoord), Float(B0, 8, 20, mColor)});

    // 18. memory and buffer, float and integer
    mTestCases.push_back({Float(M0, 0, 8, mCoord), SByte(B0, 0, 12, mColor)});

    // 19. buffer and memory, unusual offset and stride
    mTestCases.push_back({Float(B0, 11, 13, mCoord), Float(M0, 23, 17, mColor)});

    // 20-21. remaining ES3 formats
    if (es3)
    {
        mTestCases.push_back({SInt(M0, 0, 40, mCoord), UInt(M0, 16, 40, mColor)});
        // Fails on Nexus devices (anglebug.com/2641)
        if (!IsNexus5X() && !IsNexus6P())
            mTestCases.push_back({NormSInt(M0, 0, 40, mCoord), NormUInt(M0, 16, 40, mColor)});
    }
}

class AttributeLayoutNonIndexed : public AttributeLayoutTest
{
    void Draw(int firstVertex, unsigned vertexCount, const GLushort *indices) override
    {
        glDrawArrays(GL_TRIANGLES, firstVertex, vertexCount);
    }
};

class AttributeLayoutMemoryIndexed : public AttributeLayoutTest
{
    void Draw(int firstVertex, unsigned vertexCount, const GLushort *indices) override
    {
        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
        glDrawElements(GL_TRIANGLES, vertexCount, GL_UNSIGNED_SHORT, indices);
    }
};

class AttributeLayoutBufferIndexed : public AttributeLayoutTest
{
    void Draw(int firstVertex, unsigned vertexCount, const GLushort *indices) override
    {
        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mIndexBuffer);
        glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(*mIndices) * vertexCount, indices,
                     GL_STATIC_DRAW);
        glDrawElements(GL_TRIANGLES, vertexCount, GL_UNSIGNED_SHORT, nullptr);
    }
};

TEST_P(AttributeLayoutNonIndexed, Test)
{
    Run(true);
    ANGLE_SKIP_TEST_IF(IsWindows() && IsAMD() && IsOpenGL());
    Run(false);
}

TEST_P(AttributeLayoutMemoryIndexed, Test)
{
    Run(true);
    ANGLE_SKIP_TEST_IF(IsWindows() && IsAMD() && (IsOpenGL() || IsD3D11_FL93()));
    Run(false);
}

TEST_P(AttributeLayoutBufferIndexed, Test)
{
    Run(true);
    ANGLE_SKIP_TEST_IF(IsWindows() && IsAMD() && (IsOpenGL() || IsD3D11_FL93()));
    Run(false);
}

#define PARAMS                                                                         \
    ES2_VULKAN(), ES2_OPENGL(), ES2_D3D9(), ES2_D3D11(), ES3_OPENGL(), ES2_OPENGLES(), \
        ES3_OPENGLES(), ES3_VULKAN()

ANGLE_INSTANTIATE_TEST(AttributeLayoutNonIndexed, PARAMS);
ANGLE_INSTANTIATE_TEST(AttributeLayoutMemoryIndexed, PARAMS);
ANGLE_INSTANTIATE_TEST(AttributeLayoutBufferIndexed, PARAMS);

}  // anonymous namespace
kc3-lang/angle/src/tests/gl_tests/AttributeLayoutTest.cpp

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kc3-lang/angle /src/tests/gl_tests/AttributeLayoutTest.cpp
