renderer_utils.cpp

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Author : Shahbaz Youssefi
Date : 2019-04-04 13:52:04
Hash : 127990f9
Message : Vulkan: Use render pass loadOp for scissored clears At this point, every clear is done through render pass loadOp, except masked color or stencil clears. The only fallback is clearWithDraw, that can clear both color and stencil at the same time. Bug: angleproject:2361 Change-Id: I805fc12475e832ad2f573f665cdfeb766e61a6d0 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1553740 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Tobin Ehlis <tobine@google.com>
src/libANGLE/renderer/renderer_utils.cpp
//
// Copyright 2016 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.
//
// renderer_utils:
//   Helper methods pertaining to most or all back-ends.
//

#include "libANGLE/renderer/renderer_utils.h"

#include "image_util/copyimage.h"
#include "image_util/imageformats.h"

#include "libANGLE/AttributeMap.h"
#include "libANGLE/Context.h"
#include "libANGLE/formatutils.h"
#include "libANGLE/renderer/ContextImpl.h"
#include "libANGLE/renderer/Format.h"

#include <string.h>
#include "common/utilities.h"

namespace rx
{

namespace
{
void CopyColor(gl::ColorF *color)
{
    // No-op
}

void PremultiplyAlpha(gl::ColorF *color)
{
    color->red *= color->alpha;
    color->green *= color->alpha;
    color->blue *= color->alpha;
}

void UnmultiplyAlpha(gl::ColorF *color)
{
    if (color->alpha != 0.0f)
    {
        float invAlpha = 1.0f / color->alpha;
        color->red *= invAlpha;
        color->green *= invAlpha;
        color->blue *= invAlpha;
    }
}

void ClipChannelsR(gl::ColorF *color)
{
    color->green = 0.0f;
    color->blue  = 0.0f;
    color->alpha = 1.0f;
}

void ClipChannelsRG(gl::ColorF *color)
{
    color->blue  = 0.0f;
    color->alpha = 1.0f;
}

void ClipChannelsRGB(gl::ColorF *color)
{
    color->alpha = 1.0f;
}

void ClipChannelsLuminance(gl::ColorF *color)
{
    color->alpha = 1.0f;
}

void ClipChannelsAlpha(gl::ColorF *color)
{
    color->red   = 0.0f;
    color->green = 0.0f;
    color->blue  = 0.0f;
}

void ClipChannelsNoOp(gl::ColorF *color) {}

void WriteUintColor(const gl::ColorF &color,
                    PixelWriteFunction colorWriteFunction,
                    uint8_t *destPixelData)
{
    gl::ColorUI destColor(
        static_cast<unsigned int>(color.red * 255), static_cast<unsigned int>(color.green * 255),
        static_cast<unsigned int>(color.blue * 255), static_cast<unsigned int>(color.alpha * 255));
    colorWriteFunction(reinterpret_cast<const uint8_t *>(&destColor), destPixelData);
}

void WriteFloatColor(const gl::ColorF &color,
                     PixelWriteFunction colorWriteFunction,
                     uint8_t *destPixelData)
{
    colorWriteFunction(reinterpret_cast<const uint8_t *>(&color), destPixelData);
}

template <typename T, int cols, int rows>
bool TransposeExpandMatrix(T *target, const GLfloat *value)
{
    constexpr int targetWidth  = 4;
    constexpr int targetHeight = rows;
    constexpr int srcWidth     = rows;
    constexpr int srcHeight    = cols;

    constexpr int copyWidth  = std::min(targetHeight, srcWidth);
    constexpr int copyHeight = std::min(targetWidth, srcHeight);

    T staging[targetWidth * targetHeight] = {0};

    for (int x = 0; x < copyWidth; x++)
    {
        for (int y = 0; y < copyHeight; y++)
        {
            staging[x * targetWidth + y] = static_cast<T>(value[y * srcWidth + x]);
        }
    }

    if (memcmp(target, staging, targetWidth * targetHeight * sizeof(T)) == 0)
    {
        return false;
    }

    memcpy(target, staging, targetWidth * targetHeight * sizeof(T));
    return true;
}

template <typename T, int cols, int rows>
bool ExpandMatrix(T *target, const GLfloat *value)
{
    constexpr int kTargetWidth  = 4;
    constexpr int kTargetHeight = rows;
    constexpr int kSrcWidth     = cols;
    constexpr int kSrcHeight    = rows;

    constexpr int kCopyWidth  = std::min(kTargetWidth, kSrcWidth);
    constexpr int kCopyHeight = std::min(kTargetHeight, kSrcHeight);

    T staging[kTargetWidth * kTargetHeight] = {0};

    for (int y = 0; y < kCopyHeight; y++)
    {
        for (int x = 0; x < kCopyWidth; x++)
        {
            staging[y * kTargetWidth + x] = static_cast<T>(value[y * kSrcWidth + x]);
        }
    }

    if (memcmp(target, staging, kTargetWidth * kTargetHeight * sizeof(T)) == 0)
    {
        return false;
    }

    memcpy(target, staging, kTargetWidth * kTargetHeight * sizeof(T));
    return true;
}
}  // anonymous namespace

PackPixelsParams::PackPixelsParams()
    : destFormat(nullptr), outputPitch(0), packBuffer(nullptr), offset(0)
{}

PackPixelsParams::PackPixelsParams(const gl::Rectangle &areaIn,
                                   const angle::Format &destFormat,
                                   GLuint outputPitchIn,
                                   bool reverseRowOrderIn,
                                   gl::Buffer *packBufferIn,
                                   ptrdiff_t offsetIn)
    : area(areaIn),
      destFormat(&destFormat),
      outputPitch(outputPitchIn),
      packBuffer(packBufferIn),
      reverseRowOrder(reverseRowOrderIn),
      offset(offsetIn)
{}

void PackPixels(const PackPixelsParams &params,
                const angle::Format &sourceFormat,
                int inputPitchIn,
                const uint8_t *sourceIn,
                uint8_t *destWithoutOffset)
{
    uint8_t *destWithOffset = destWithoutOffset + params.offset;

    const uint8_t *source = sourceIn;
    int inputPitch        = inputPitchIn;

    if (params.reverseRowOrder)
    {
        source += inputPitch * (params.area.height - 1);
        inputPitch = -inputPitch;
    }

    if (sourceFormat == *params.destFormat)
    {
        // Direct copy possible
        for (int y = 0; y < params.area.height; ++y)
        {
            memcpy(destWithOffset + y * params.outputPitch, source + y * inputPitch,
                   params.area.width * sourceFormat.pixelBytes);
        }
        return;
    }

    PixelCopyFunction fastCopyFunc = sourceFormat.fastCopyFunctions.get(params.destFormat->id);

    if (fastCopyFunc)
    {
        // Fast copy is possible through some special function
        for (int y = 0; y < params.area.height; ++y)
        {
            for (int x = 0; x < params.area.width; ++x)
            {
                uint8_t *dest =
                    destWithOffset + y * params.outputPitch + x * params.destFormat->pixelBytes;
                const uint8_t *src = source + y * inputPitch + x * sourceFormat.pixelBytes;

                fastCopyFunc(src, dest);
            }
        }
        return;
    }

    PixelWriteFunction pixelWriteFunction = params.destFormat->pixelWriteFunction;
    ASSERT(pixelWriteFunction != nullptr);

    // Maximum size of any Color<T> type used.
    uint8_t temp[16];
    static_assert(sizeof(temp) >= sizeof(gl::ColorF) && sizeof(temp) >= sizeof(gl::ColorUI) &&
                      sizeof(temp) >= sizeof(gl::ColorI) &&
                      sizeof(temp) >= sizeof(angle::DepthStencil),
                  "Unexpected size of pixel struct.");

    PixelReadFunction pixelReadFunction = sourceFormat.pixelReadFunction;
    ASSERT(pixelReadFunction != nullptr);

    for (int y = 0; y < params.area.height; ++y)
    {
        for (int x = 0; x < params.area.width; ++x)
        {
            uint8_t *dest =
                destWithOffset + y * params.outputPitch + x * params.destFormat->pixelBytes;
            const uint8_t *src = source + y * inputPitch + x * sourceFormat.pixelBytes;

            // readFunc and writeFunc will be using the same type of color, CopyTexImage
            // will not allow the copy otherwise.
            pixelReadFunction(src, temp);
            pixelWriteFunction(temp, dest);
        }
    }
}

bool FastCopyFunctionMap::has(angle::FormatID formatID) const
{
    return (get(formatID) != nullptr);
}

PixelCopyFunction FastCopyFunctionMap::get(angle::FormatID formatID) const
{
    for (size_t index = 0; index < mSize; ++index)
    {
        if (mData[index].formatID == formatID)
        {
            return mData[index].func;
        }
    }

    return nullptr;
}

bool ShouldUseDebugLayers(const egl::AttributeMap &attribs)
{
    EGLAttrib debugSetting =
        attribs.get(EGL_PLATFORM_ANGLE_DEBUG_LAYERS_ENABLED_ANGLE, EGL_DONT_CARE);

// Prefer to enable debug layers if compiling in Debug, and disabled in Release.
#if defined(ANGLE_ENABLE_ASSERTS)
    return (debugSetting != EGL_FALSE);
#else
    return (debugSetting == EGL_TRUE);
#endif  // defined(ANGLE_ENABLE_ASSERTS)
}

bool ShouldUseVirtualizedContexts(const egl::AttributeMap &attribs, bool defaultValue)
{
    EGLAttrib virtualizedContextRequest =
        attribs.get(EGL_PLATFORM_ANGLE_CONTEXT_VIRTUALIZATION_ANGLE, EGL_DONT_CARE);
    if (defaultValue)
    {
        return (virtualizedContextRequest != EGL_FALSE);
    }
    else
    {
        return (virtualizedContextRequest == EGL_TRUE);
    }
}

void CopyImageCHROMIUM(const uint8_t *sourceData,
                       size_t sourceRowPitch,
                       size_t sourcePixelBytes,
                       size_t sourceDepthPitch,
                       PixelReadFunction pixelReadFunction,
                       uint8_t *destData,
                       size_t destRowPitch,
                       size_t destPixelBytes,
                       size_t destDepthPitch,
                       PixelWriteFunction pixelWriteFunction,
                       GLenum destUnsizedFormat,
                       GLenum destComponentType,
                       size_t width,
                       size_t height,
                       size_t depth,
                       bool unpackFlipY,
                       bool unpackPremultiplyAlpha,
                       bool unpackUnmultiplyAlpha)
{
    using ConversionFunction              = void (*)(gl::ColorF *);
    ConversionFunction conversionFunction = CopyColor;
    if (unpackPremultiplyAlpha != unpackUnmultiplyAlpha)
    {
        if (unpackPremultiplyAlpha)
        {
            conversionFunction = PremultiplyAlpha;
        }
        else
        {
            conversionFunction = UnmultiplyAlpha;
        }
    }

    auto clipChannelsFunction = ClipChannelsNoOp;
    switch (destUnsizedFormat)
    {
        case GL_RED:
            clipChannelsFunction = ClipChannelsR;
            break;
        case GL_RG:
            clipChannelsFunction = ClipChannelsRG;
            break;
        case GL_RGB:
            clipChannelsFunction = ClipChannelsRGB;
            break;
        case GL_LUMINANCE:
            clipChannelsFunction = ClipChannelsLuminance;
            break;
        case GL_ALPHA:
            clipChannelsFunction = ClipChannelsAlpha;
            break;
    }

    auto writeFunction = (destComponentType == GL_UNSIGNED_INT) ? WriteUintColor : WriteFloatColor;

    for (size_t z = 0; z < depth; z++)
    {
        for (size_t y = 0; y < height; y++)
        {
            for (size_t x = 0; x < width; x++)
            {
                const uint8_t *sourcePixelData =
                    sourceData + y * sourceRowPitch + x * sourcePixelBytes + z * sourceDepthPitch;

                gl::ColorF sourceColor;
                pixelReadFunction(sourcePixelData, reinterpret_cast<uint8_t *>(&sourceColor));

                conversionFunction(&sourceColor);
                clipChannelsFunction(&sourceColor);

                size_t destY = 0;
                if (unpackFlipY)
                {
                    destY += (height - 1);
                    destY -= y;
                }
                else
                {
                    destY += y;
                }

                uint8_t *destPixelData =
                    destData + destY * destRowPitch + x * destPixelBytes + z * destDepthPitch;
                writeFunction(sourceColor, pixelWriteFunction, destPixelData);
            }
        }
    }
}

// IncompleteTextureSet implementation.
IncompleteTextureSet::IncompleteTextureSet() {}

IncompleteTextureSet::~IncompleteTextureSet() {}

void IncompleteTextureSet::onDestroy(const gl::Context *context)
{
    // Clear incomplete textures.
    for (auto &incompleteTexture : mIncompleteTextures)
    {
        if (incompleteTexture.get() != nullptr)
        {
            incompleteTexture->onDestroy(context);
            incompleteTexture.set(context, nullptr);
        }
    }
}

angle::Result IncompleteTextureSet::getIncompleteTexture(
    const gl::Context *context,
    gl::TextureType type,
    MultisampleTextureInitializer *multisampleInitializer,
    gl::Texture **textureOut)
{
    *textureOut = mIncompleteTextures[type].get();
    if (*textureOut != nullptr)
    {
        return angle::Result::Continue;
    }

    ContextImpl *implFactory = context->getImplementation();

    const GLubyte color[] = {0, 0, 0, 255};
    const gl::Extents colorSize(1, 1, 1);
    gl::PixelUnpackState unpack;
    unpack.alignment = 1;
    const gl::Box area(0, 0, 0, 1, 1, 1);

    // If a texture is external use a 2D texture for the incomplete texture
    gl::TextureType createType = (type == gl::TextureType::External) ? gl::TextureType::_2D : type;

    gl::Texture *tex = new gl::Texture(implFactory, std::numeric_limits<GLuint>::max(), createType);
    angle::UniqueObjectPointer<gl::Texture, gl::Context> t(tex, context);

    // This is a bit of a kludge but is necessary to consume the error.
    gl::Context *mutableContext = const_cast<gl::Context *>(context);

    if (createType == gl::TextureType::_2DMultisample)
    {
        ANGLE_TRY(
            t->setStorageMultisample(mutableContext, createType, 1, GL_RGBA8, colorSize, true));
    }
    else
    {
        ANGLE_TRY(t->setStorage(mutableContext, createType, 1, GL_RGBA8, colorSize));
    }

    if (type == gl::TextureType::CubeMap)
    {
        for (gl::TextureTarget face : gl::AllCubeFaceTextureTargets())
        {
            ANGLE_TRY(t->setSubImage(mutableContext, unpack, nullptr, face, 0, area, GL_RGBA,
                                     GL_UNSIGNED_BYTE, color));
        }
    }
    else if (type == gl::TextureType::_2DMultisample)
    {
        // Call a specialized clear function to init a multisample texture.
        ANGLE_TRY(multisampleInitializer->initializeMultisampleTextureToBlack(context, t.get()));
    }
    else
    {
        ANGLE_TRY(t->setSubImage(mutableContext, unpack, nullptr,
                                 gl::NonCubeTextureTypeToTarget(createType), 0, area, GL_RGBA,
                                 GL_UNSIGNED_BYTE, color));
    }

    ANGLE_TRY(t->syncState(context));

    mIncompleteTextures[type].set(context, t.release());
    *textureOut = mIncompleteTextures[type].get();
    return angle::Result::Continue;
}

#define ANGLE_INSTANTIATE_SET_UNIFORM_MATRIX_FUNC(cols, rows)                            \
    template bool SetFloatUniformMatrix<cols, rows>(unsigned int, unsigned int, GLsizei, \
                                                    GLboolean, const GLfloat *, uint8_t *)

ANGLE_INSTANTIATE_SET_UNIFORM_MATRIX_FUNC(2, 2);
ANGLE_INSTANTIATE_SET_UNIFORM_MATRIX_FUNC(3, 3);
ANGLE_INSTANTIATE_SET_UNIFORM_MATRIX_FUNC(4, 4);
ANGLE_INSTANTIATE_SET_UNIFORM_MATRIX_FUNC(2, 3);
ANGLE_INSTANTIATE_SET_UNIFORM_MATRIX_FUNC(3, 2);
ANGLE_INSTANTIATE_SET_UNIFORM_MATRIX_FUNC(2, 4);
ANGLE_INSTANTIATE_SET_UNIFORM_MATRIX_FUNC(4, 2);
ANGLE_INSTANTIATE_SET_UNIFORM_MATRIX_FUNC(3, 4);
ANGLE_INSTANTIATE_SET_UNIFORM_MATRIX_FUNC(4, 3);

#undef ANGLE_INSTANTIATE_SET_UNIFORM_MATRIX_FUNC

template <int cols, int rows>
bool SetFloatUniformMatrix(unsigned int arrayElementOffset,
                           unsigned int elementCount,
                           GLsizei countIn,
                           GLboolean transpose,
                           const GLfloat *value,
                           uint8_t *targetData)
{
    unsigned int count =
        std::min(elementCount - arrayElementOffset, static_cast<unsigned int>(countIn));

    const unsigned int targetMatrixStride = (4 * rows);
    GLfloat *target                       = reinterpret_cast<GLfloat *>(
        targetData + arrayElementOffset * sizeof(GLfloat) * targetMatrixStride);

    bool dirty = false;

    for (unsigned int i = 0; i < count; i++)
    {
        if (transpose == GL_FALSE)
        {
            dirty = ExpandMatrix<GLfloat, cols, rows>(target, value) || dirty;
        }
        else
        {
            dirty = TransposeExpandMatrix<GLfloat, cols, rows>(target, value) || dirty;
        }
        target += targetMatrixStride;
        value += cols * rows;
    }

    return dirty;
}

template void GetMatrixUniform<GLint>(GLenum, GLint *, const GLint *, bool);
template void GetMatrixUniform<GLuint>(GLenum, GLuint *, const GLuint *, bool);

void GetMatrixUniform(GLenum type, GLfloat *dataOut, const GLfloat *source, bool transpose)
{
    int columns = gl::VariableColumnCount(type);
    int rows    = gl::VariableRowCount(type);
    for (GLint col = 0; col < columns; ++col)
    {
        for (GLint row = 0; row < rows; ++row)
        {
            GLfloat *outptr = dataOut + ((col * rows) + row);
            const GLfloat *inptr =
                transpose ? source + ((row * 4) + col) : source + ((col * 4) + row);
            *outptr = *inptr;
        }
    }
}

template <typename NonFloatT>
void GetMatrixUniform(GLenum type, NonFloatT *dataOut, const NonFloatT *source, bool transpose)
{
    UNREACHABLE();
}

const angle::Format &GetFormatFromFormatType(GLenum format, GLenum type)
{
    GLenum sizedInternalFormat    = gl::GetInternalFormatInfo(format, type).sizedInternalFormat;
    angle::FormatID angleFormatID = angle::Format::InternalFormatToID(sizedInternalFormat);
    return angle::Format::Get(angleFormatID);
}

angle::Result ComputeStartVertex(ContextImpl *contextImpl,
                                 const gl::IndexRange &indexRange,
                                 GLint baseVertex,
                                 GLint *firstVertexOut)
{
    // The entire index range should be within the limits of a 32-bit uint because the largest
    // GL index type is GL_UNSIGNED_INT.
    ASSERT(indexRange.start <= std::numeric_limits<uint32_t>::max() &&
           indexRange.end <= std::numeric_limits<uint32_t>::max());

    // The base vertex is only used in DrawElementsIndirect. Given the assertion above and the
    // type of mBaseVertex (GLint), adding them both as 64-bit ints is safe.
    int64_t startVertexInt64 =
        static_cast<int64_t>(baseVertex) + static_cast<int64_t>(indexRange.start);

    // OpenGL ES 3.2 spec section 10.5: "Behavior of DrawElementsOneInstance is undefined if the
    // vertex ID is negative for any element"
    ANGLE_CHECK_GL_MATH(contextImpl, startVertexInt64 >= 0);

    // OpenGL ES 3.2 spec section 10.5: "If the vertex ID is larger than the maximum value
    // representable by type, it should behave as if the calculation were upconverted to 32-bit
    // unsigned integers(with wrapping on overflow conditions)." ANGLE does not fully handle
    // these rules, an overflow error is returned if the start vertex cannot be stored in a
    // 32-bit signed integer.
    ANGLE_CHECK_GL_MATH(contextImpl, startVertexInt64 <= std::numeric_limits<GLint>::max());

    *firstVertexOut = static_cast<GLint>(startVertexInt64);
    return angle::Result::Continue;
}

angle::Result GetVertexRangeInfo(const gl::Context *context,
                                 GLint firstVertex,
                                 GLsizei vertexOrIndexCount,
                                 gl::DrawElementsType indexTypeOrInvalid,
                                 const void *indices,
                                 GLint baseVertex,
                                 GLint *startVertexOut,
                                 size_t *vertexCountOut)
{
    if (indexTypeOrInvalid != gl::DrawElementsType::InvalidEnum)
    {
        gl::IndexRange indexRange;
        ANGLE_TRY(context->getState().getVertexArray()->getIndexRange(
            context, indexTypeOrInvalid, vertexOrIndexCount, indices, &indexRange));
        ANGLE_TRY(ComputeStartVertex(context->getImplementation(), indexRange, baseVertex,
                                     startVertexOut));
        *vertexCountOut = indexRange.vertexCount();
    }
    else
    {
        *startVertexOut = firstVertex;
        *vertexCountOut = vertexOrIndexCount;
    }
    return angle::Result::Continue;
}

gl::Rectangle ClipRectToScissor(const gl::State &glState, const gl::Rectangle &rect, bool invertY)
{
    if (glState.isScissorTestEnabled())
    {
        gl::Rectangle clippedRect;
        if (!gl::ClipRectangle(glState.getScissor(), rect, &clippedRect))
        {
            return gl::Rectangle();
        }

        if (invertY)
        {
            clippedRect.y = rect.height - clippedRect.y - clippedRect.height;
        }

        return clippedRect;
    }

    // If the scissor test isn't enabled, assume it has infinite size.  Its intersection with the
    // rect would be the rect itself.
    //
    // Note that on Vulkan, returning this (as opposed to a fixed max-int-sized rect) could lead to
    // unnecessary pipeline creations if two otherwise identical pipelines are used on framebuffers
    // with different sizes.  If such usage is observed in an application, we should investigate
    // possible optimizations.
    return rect;
}
}  // namespace rx
kc3-lang/angle/src/libANGLE/renderer/renderer_utils.cpp

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kc3-lang/angle /src/libANGLE/renderer/renderer_utils.cpp
