VertexArray.cpp

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Author : Jamie Madill
Date : 2019-05-10 08:27:00
Hash : e4faae21
Message : Rename state change notification messages. This makes the style use CamelCase instead of ALL_CAPS. It also cleans up some of the naming. It also changes some uses of the messages in some of the objects to hopefully be more consistent. See the comments added to the enum SubjectMessage in Observer.h for more details. Bug: angleproject:3427 Change-Id: I6dff4f6d335ecf1a27e48df65743b1490bd3025a Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1600411 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>
src/libANGLE/VertexArray.cpp
//
// Copyright (c) 2013 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.
//
// Implementation of the state class for mananging GLES 3 Vertex Array Objects.
//

#include "libANGLE/VertexArray.h"

#include "common/utilities.h"
#include "libANGLE/Buffer.h"
#include "libANGLE/Context.h"
#include "libANGLE/renderer/BufferImpl.h"
#include "libANGLE/renderer/GLImplFactory.h"
#include "libANGLE/renderer/VertexArrayImpl.h"

namespace gl
{
namespace
{
bool IsElementArrayBufferSubjectIndex(angle::SubjectIndex subjectIndex)
{
    return (subjectIndex == MAX_VERTEX_ATTRIBS);
}

ANGLE_INLINE ComponentType GetVertexAttributeComponentType(bool pureInteger, VertexAttribType type)
{
    if (pureInteger)
    {
        switch (type)
        {
            case VertexAttribType::Byte:
            case VertexAttribType::Short:
            case VertexAttribType::Int:
                return ComponentType::Int;

            case VertexAttribType::UnsignedByte:
            case VertexAttribType::UnsignedShort:
            case VertexAttribType::UnsignedInt:
                return ComponentType::UnsignedInt;

            default:
                UNREACHABLE();
                return ComponentType::NoType;
        }
    }
    else
    {
        return ComponentType::Float;
    }
}

constexpr angle::SubjectIndex kElementArrayBufferIndex = MAX_VERTEX_ATTRIBS;
}  // namespace

// VertexArrayState implementation.
VertexArrayState::VertexArrayState(VertexArray *vertexArray,
                                   size_t maxAttribs,
                                   size_t maxAttribBindings)
    : mElementArrayBuffer(vertexArray, kElementArrayBufferIndex)
{
    ASSERT(maxAttribs <= maxAttribBindings);

    for (size_t i = 0; i < maxAttribs; i++)
    {
        mVertexAttributes.emplace_back(static_cast<GLuint>(i));
        mVertexBindings.emplace_back(static_cast<GLuint>(i));
    }

    // Initially all attributes start as "client" with no buffer bound.
    mClientMemoryAttribsMask.set();
}

VertexArrayState::~VertexArrayState() {}

bool VertexArrayState::hasEnabledNullPointerClientArray() const
{
    return (mNullPointerClientMemoryAttribsMask & mEnabledAttributesMask).any();
}

AttributesMask VertexArrayState::getBindingToAttributesMask(GLuint bindingIndex) const
{
    ASSERT(bindingIndex < MAX_VERTEX_ATTRIB_BINDINGS);
    return mVertexBindings[bindingIndex].getBoundAttributesMask();
}

// Set an attribute using a new binding.
void VertexArrayState::setAttribBinding(const Context *context,
                                        size_t attribIndex,
                                        GLuint newBindingIndex)
{
    ASSERT(attribIndex < MAX_VERTEX_ATTRIBS && newBindingIndex < MAX_VERTEX_ATTRIB_BINDINGS);

    VertexAttribute &attrib = mVertexAttributes[attribIndex];

    // Update the binding-attribute map.
    const GLuint oldBindingIndex = attrib.bindingIndex;
    ASSERT(oldBindingIndex != newBindingIndex);

    VertexBinding &oldBinding = mVertexBindings[oldBindingIndex];
    VertexBinding &newBinding = mVertexBindings[newBindingIndex];

    ASSERT(oldBinding.getBoundAttributesMask().test(attribIndex) &&
           !newBinding.getBoundAttributesMask().test(attribIndex));

    oldBinding.resetBoundAttribute(attribIndex);
    newBinding.setBoundAttribute(attribIndex);

    // Set the attribute using the new binding.
    attrib.bindingIndex = newBindingIndex;

    if (context->isBufferAccessValidationEnabled())
    {
        attrib.updateCachedElementLimit(newBinding);
    }

    bool isMapped = newBinding.getBuffer().get() && newBinding.getBuffer()->isMapped();
    mCachedMappedArrayBuffers.set(attribIndex, isMapped);
    mCachedEnabledMappedArrayBuffers.set(attribIndex, isMapped && attrib.enabled);
}

// VertexArray implementation.
VertexArray::VertexArray(rx::GLImplFactory *factory,
                         GLuint id,
                         size_t maxAttribs,
                         size_t maxAttribBindings)
    : mId(id),
      mState(this, maxAttribs, maxAttribBindings),
      mVertexArray(factory->createVertexArray(mState))
{
    for (size_t attribIndex = 0; attribIndex < maxAttribBindings; ++attribIndex)
    {
        mArrayBufferObserverBindings.emplace_back(this, attribIndex);
    }
}

void VertexArray::onDestroy(const Context *context)
{
    bool isBound = context->isCurrentVertexArray(this);
    for (VertexBinding &binding : mState.mVertexBindings)
    {
        if (isBound)
        {
            if (binding.getBuffer().get())
                binding.getBuffer()->onNonTFBindingChanged(-1);
        }
        binding.setBuffer(context, nullptr);
    }
    if (isBound && mState.mElementArrayBuffer.get())
        mState.mElementArrayBuffer->onNonTFBindingChanged(-1);
    mState.mElementArrayBuffer.bind(context, nullptr);
    mVertexArray->destroy(context);
    SafeDelete(mVertexArray);
    delete this;
}

VertexArray::~VertexArray()
{
    ASSERT(!mVertexArray);
}

void VertexArray::setLabel(const Context *context, const std::string &label)
{
    mState.mLabel = label;
}

const std::string &VertexArray::getLabel() const
{
    return mState.mLabel;
}

bool VertexArray::detachBuffer(const Context *context, GLuint bufferName)
{
    bool isBound           = context->isCurrentVertexArray(this);
    bool anyBufferDetached = false;
    for (size_t bindingIndex = 0; bindingIndex < gl::MAX_VERTEX_ATTRIB_BINDINGS; ++bindingIndex)
    {
        VertexBinding &binding = mState.mVertexBindings[bindingIndex];
        if (binding.getBuffer().id() == bufferName)
        {
            if (isBound)
            {
                if (binding.getBuffer().get())
                    binding.getBuffer()->onNonTFBindingChanged(-1);
            }
            binding.setBuffer(context, nullptr);
            mArrayBufferObserverBindings[bindingIndex].reset();

            if (context->getClientVersion() >= ES_3_1)
            {
                setDirtyBindingBit(bindingIndex, DIRTY_BINDING_BUFFER);
            }
            else
            {
                ASSERT(binding.getBoundAttributesMask() == AttributesMask(1ull << bindingIndex));
                setDirtyAttribBit(bindingIndex, DIRTY_ATTRIB_POINTER);
            }

            anyBufferDetached = true;
            mState.mClientMemoryAttribsMask |= binding.getBoundAttributesMask();
        }
    }

    if (mState.mElementArrayBuffer.get() && mState.mElementArrayBuffer->id() == bufferName)
    {
        if (isBound && mState.mElementArrayBuffer.get())
            mState.mElementArrayBuffer->onNonTFBindingChanged(-1);
        mState.mElementArrayBuffer.bind(context, nullptr);
        mDirtyBits.set(DIRTY_BIT_ELEMENT_ARRAY_BUFFER);
        anyBufferDetached = true;
    }

    return anyBufferDetached;
}

const VertexAttribute &VertexArray::getVertexAttribute(size_t attribIndex) const
{
    ASSERT(attribIndex < getMaxAttribs());
    return mState.mVertexAttributes[attribIndex];
}

const VertexBinding &VertexArray::getVertexBinding(size_t bindingIndex) const
{
    ASSERT(bindingIndex < getMaxBindings());
    return mState.mVertexBindings[bindingIndex];
}

size_t VertexArray::GetVertexIndexFromDirtyBit(size_t dirtyBit)
{
    static_assert(gl::MAX_VERTEX_ATTRIBS == gl::MAX_VERTEX_ATTRIB_BINDINGS,
                  "The stride of vertex attributes should equal to that of vertex bindings.");
    ASSERT(dirtyBit > DIRTY_BIT_ELEMENT_ARRAY_BUFFER);
    return (dirtyBit - DIRTY_BIT_ATTRIB_0) % gl::MAX_VERTEX_ATTRIBS;
}

ANGLE_INLINE void VertexArray::setDirtyAttribBit(size_t attribIndex,
                                                 DirtyAttribBitType dirtyAttribBit)
{
    mDirtyBits.set(DIRTY_BIT_ATTRIB_0 + attribIndex);
    mDirtyAttribBits[attribIndex].set(dirtyAttribBit);
}

ANGLE_INLINE void VertexArray::setDirtyBindingBit(size_t bindingIndex,
                                                  DirtyBindingBitType dirtyBindingBit)
{
    mDirtyBits.set(DIRTY_BIT_BINDING_0 + bindingIndex);
    mDirtyBindingBits[bindingIndex].set(dirtyBindingBit);
}

ANGLE_INLINE void VertexArray::updateCachedBufferBindingSize(const Context *context,
                                                             VertexBinding *binding)
{
    if (!context->isBufferAccessValidationEnabled())
        return;

    for (size_t boundAttribute : binding->getBoundAttributesMask())
    {
        mState.mVertexAttributes[boundAttribute].updateCachedElementLimit(*binding);
    }
}

ANGLE_INLINE void VertexArray::updateCachedMappedArrayBuffers(
    bool isMapped,
    const AttributesMask &boundAttributesMask)
{
    if (isMapped)
    {
        mState.mCachedMappedArrayBuffers |= boundAttributesMask;
    }
    else
    {
        mState.mCachedMappedArrayBuffers &= ~boundAttributesMask;
    }

    mState.mCachedEnabledMappedArrayBuffers =
        mState.mCachedMappedArrayBuffers & mState.mEnabledAttributesMask;
}

ANGLE_INLINE void VertexArray::updateCachedMappedArrayBuffersBinding(const VertexBinding &binding)
{
    const Buffer *buffer = binding.getBuffer().get();
    return updateCachedMappedArrayBuffers(buffer && buffer->isMapped(),
                                          binding.getBoundAttributesMask());
}

ANGLE_INLINE void VertexArray::updateCachedTransformFeedbackBindingValidation(size_t bindingIndex,
                                                                              const Buffer *buffer)
{
    const bool hasConflict = buffer && buffer->isBoundForTransformFeedbackAndOtherUse();
    mCachedTransformFeedbackConflictedBindingsMask.set(bindingIndex, hasConflict);
}

void VertexArray::bindVertexBufferImpl(const Context *context,
                                       size_t bindingIndex,
                                       Buffer *boundBuffer,
                                       GLintptr offset,
                                       GLsizei stride)
{
    ASSERT(bindingIndex < getMaxBindings());
    ASSERT(context->isCurrentVertexArray(this));

    VertexBinding *binding = &mState.mVertexBindings[bindingIndex];

    Buffer *oldBuffer                = binding->getBuffer().get();
    angle::ObserverBinding *observer = &mArrayBufferObserverBindings[bindingIndex];
    observer->assignSubject(boundBuffer);

    // Several nullptr checks are combined here for optimization purposes.
    if (oldBuffer)
    {
        oldBuffer->onNonTFBindingChanged(-1);
        oldBuffer->removeObserver(observer);
        oldBuffer->release(context);
    }

    binding->assignBuffer(boundBuffer);
    binding->setOffset(offset);
    binding->setStride(stride);
    updateCachedBufferBindingSize(context, binding);

    // Update client memory attribute pointers. Affects all bound attributes.
    if (boundBuffer)
    {
        boundBuffer->addRef();
        boundBuffer->onNonTFBindingChanged(1);
        boundBuffer->addObserver(observer);
        mCachedTransformFeedbackConflictedBindingsMask.set(
            bindingIndex, boundBuffer->isBoundForTransformFeedbackAndOtherUse());
        mState.mClientMemoryAttribsMask &= ~binding->getBoundAttributesMask();
        updateCachedMappedArrayBuffers(boundBuffer->isMapped(), binding->getBoundAttributesMask());
    }
    else
    {
        mCachedTransformFeedbackConflictedBindingsMask.set(bindingIndex, false);
        mState.mClientMemoryAttribsMask |= binding->getBoundAttributesMask();
        updateCachedMappedArrayBuffers(false, binding->getBoundAttributesMask());
    }
}

void VertexArray::bindVertexBuffer(const Context *context,
                                   size_t bindingIndex,
                                   Buffer *boundBuffer,
                                   GLintptr offset,
                                   GLsizei stride)
{
    bindVertexBufferImpl(context, bindingIndex, boundBuffer, offset, stride);
    setDirtyBindingBit(bindingIndex, DIRTY_BINDING_BUFFER);
}

void VertexArray::setVertexAttribBinding(const Context *context,
                                         size_t attribIndex,
                                         GLuint bindingIndex)
{
    ASSERT(attribIndex < getMaxAttribs() && bindingIndex < getMaxBindings());

    if (mState.mVertexAttributes[attribIndex].bindingIndex != bindingIndex)
    {
        // In ES 3.0 contexts, the binding cannot change, hence the code below is unreachable.
        ASSERT(context->getClientVersion() >= ES_3_1);

        mState.setAttribBinding(context, attribIndex, bindingIndex);

        setDirtyAttribBit(attribIndex, DIRTY_ATTRIB_BINDING);

        // Update client attribs mask.
        bool hasBuffer = mState.mVertexBindings[bindingIndex].getBuffer().get() != nullptr;
        mState.mClientMemoryAttribsMask.set(attribIndex, !hasBuffer);
    }
}

void VertexArray::setVertexBindingDivisor(size_t bindingIndex, GLuint divisor)
{
    ASSERT(bindingIndex < getMaxBindings());

    VertexBinding &binding = mState.mVertexBindings[bindingIndex];

    binding.setDivisor(divisor);
    setDirtyBindingBit(bindingIndex, DIRTY_BINDING_DIVISOR);

    // Trigger updates in all bound attributes.
    for (size_t attribIndex : binding.getBoundAttributesMask())
    {
        mState.mVertexAttributes[attribIndex].updateCachedElementLimit(binding);
    }
}

ANGLE_INLINE void VertexArray::setVertexAttribFormatImpl(VertexAttribute *attrib,
                                                         GLint size,
                                                         VertexAttribType type,
                                                         bool normalized,
                                                         GLuint relativeOffset)
{
    attrib->size           = size;
    attrib->type           = type;
    attrib->normalized     = normalized;
    attrib->relativeOffset = relativeOffset;
}

void VertexArray::setVertexAttribFormat(size_t attribIndex,
                                        GLint size,
                                        VertexAttribType type,
                                        bool normalized,
                                        bool pureInteger,
                                        GLuint relativeOffset)
{
    VertexAttribute &attrib = mState.mVertexAttributes[attribIndex];
    attrib.pureInteger      = pureInteger;

    ComponentType componentType = GetVertexAttributeComponentType(pureInteger, type);
    SetComponentTypeMask(componentType, attribIndex, &mState.mVertexAttributesTypeMask);

    setVertexAttribFormatImpl(&attrib, size, type, normalized, relativeOffset);
    setDirtyAttribBit(attribIndex, DIRTY_ATTRIB_FORMAT);

    attrib.updateCachedElementLimit(mState.mVertexBindings[attrib.bindingIndex]);
}

void VertexArray::setVertexAttribDivisor(const Context *context, size_t attribIndex, GLuint divisor)
{
    ASSERT(attribIndex < getMaxAttribs());

    setVertexAttribBinding(context, attribIndex, static_cast<GLuint>(attribIndex));
    setVertexBindingDivisor(attribIndex, divisor);
}

void VertexArray::enableAttribute(size_t attribIndex, bool enabledState)
{
    ASSERT(attribIndex < getMaxAttribs());

    VertexAttribute &attrib = mState.mVertexAttributes[attribIndex];

    if (mState.mEnabledAttributesMask.test(attribIndex) == enabledState)
    {
        return;
    }

    attrib.enabled = enabledState;

    setDirtyAttribBit(attribIndex, DIRTY_ATTRIB_ENABLED);

    // Update state cache
    mState.mEnabledAttributesMask.set(attribIndex, enabledState);
    mState.mCachedEnabledMappedArrayBuffers =
        mState.mCachedMappedArrayBuffers & mState.mEnabledAttributesMask;
}

ANGLE_INLINE void VertexArray::setVertexAttribPointerImpl(const Context *context,
                                                          ComponentType componentType,
                                                          bool pureInteger,
                                                          size_t attribIndex,
                                                          Buffer *boundBuffer,
                                                          GLint size,
                                                          VertexAttribType type,
                                                          bool normalized,
                                                          GLsizei stride,
                                                          const void *pointer)
{
    ASSERT(attribIndex < getMaxAttribs());

    GLintptr offset = boundBuffer ? reinterpret_cast<GLintptr>(pointer) : 0;

    VertexAttribute &attrib = mState.mVertexAttributes[attribIndex];
    attrib.pureInteger      = pureInteger;

    SetComponentTypeMask(componentType, attribIndex, &mState.mVertexAttributesTypeMask);

    setVertexAttribFormatImpl(&attrib, size, type, normalized, 0);
    setVertexAttribBinding(context, attribIndex, static_cast<GLuint>(attribIndex));

    GLsizei effectiveStride =
        stride != 0 ? stride : static_cast<GLsizei>(ComputeVertexAttributeTypeSize(attrib));
    attrib.pointer                 = pointer;
    attrib.vertexAttribArrayStride = stride;

    bindVertexBufferImpl(context, attribIndex, boundBuffer, offset, effectiveStride);

    setDirtyAttribBit(attribIndex, DIRTY_ATTRIB_POINTER);

    mState.mNullPointerClientMemoryAttribsMask.set(attribIndex,
                                                   boundBuffer == nullptr && pointer == nullptr);
}

void VertexArray::setVertexAttribPointer(const Context *context,
                                         size_t attribIndex,
                                         gl::Buffer *boundBuffer,
                                         GLint size,
                                         VertexAttribType type,
                                         bool normalized,
                                         GLsizei stride,
                                         const void *pointer)
{
    setVertexAttribPointerImpl(context, ComponentType::Float, false, attribIndex, boundBuffer, size,
                               type, normalized, stride, pointer);
}

void VertexArray::setVertexAttribIPointer(const Context *context,
                                          size_t attribIndex,
                                          gl::Buffer *boundBuffer,
                                          GLint size,
                                          VertexAttribType type,
                                          GLsizei stride,
                                          const void *pointer)
{
    ComponentType componentType = GetVertexAttributeComponentType(true, type);
    setVertexAttribPointerImpl(context, componentType, true, attribIndex, boundBuffer, size, type,
                               false, stride, pointer);
}

angle::Result VertexArray::syncState(const Context *context)
{
    if (mDirtyBits.any())
    {
        mDirtyBitsGuard = mDirtyBits;
        ANGLE_TRY(
            mVertexArray->syncState(context, mDirtyBits, &mDirtyAttribBits, &mDirtyBindingBits));
        mDirtyBits.reset();
        mDirtyBitsGuard.reset();

        // The dirty bits should be reset in the back-end. To simplify ASSERTs only check attrib 0.
        ASSERT(mDirtyAttribBits[0].none());
        ASSERT(mDirtyBindingBits[0].none());
    }
    return angle::Result::Continue;
}

void VertexArray::onBindingChanged(const Context *context, int incr)
{
    if (mState.mElementArrayBuffer.get())
        mState.mElementArrayBuffer->onNonTFBindingChanged(incr);
    for (auto &binding : mState.mVertexBindings)
    {
        binding.onContainerBindingChanged(context, incr);
    }
}

VertexArray::DirtyBitType VertexArray::getDirtyBitFromIndex(bool contentsChanged,
                                                            angle::SubjectIndex index) const
{
    if (IsElementArrayBufferSubjectIndex(index))
    {
        mIndexRangeCache.invalidate();
        return contentsChanged ? DIRTY_BIT_ELEMENT_ARRAY_BUFFER_DATA
                               : DIRTY_BIT_ELEMENT_ARRAY_BUFFER;
    }
    else
    {
        // Note: this currently just gets the top-level dirty bit.
        ASSERT(index < mArrayBufferObserverBindings.size());
        return static_cast<DirtyBitType>(
            (contentsChanged ? DIRTY_BIT_BUFFER_DATA_0 : DIRTY_BIT_BINDING_0) + index);
    }
}

void VertexArray::onSubjectStateChange(const gl::Context *context,
                                       angle::SubjectIndex index,
                                       angle::SubjectMessage message)
{
    switch (message)
    {
        case angle::SubjectMessage::ContentsChanged:
            setDependentDirtyBit(context, true, index);
            break;

        case angle::SubjectMessage::SubjectChanged:
            if (!IsElementArrayBufferSubjectIndex(index))
            {
                updateCachedBufferBindingSize(context, &mState.mVertexBindings[index]);
            }
            setDependentDirtyBit(context, false, index);
            break;

        case angle::SubjectMessage::BindingChanged:
            if (!IsElementArrayBufferSubjectIndex(index))
            {
                const Buffer *buffer = mState.mVertexBindings[index].getBuffer().get();
                updateCachedTransformFeedbackBindingValidation(index, buffer);
            }
            break;

        case angle::SubjectMessage::SubjectMapped:
            if (!IsElementArrayBufferSubjectIndex(index))
            {
                updateCachedMappedArrayBuffersBinding(mState.mVertexBindings[index]);
            }
            onStateChange(context, angle::SubjectMessage::SubjectMapped);
            break;

        case angle::SubjectMessage::SubjectUnmapped:
            setDependentDirtyBit(context, true, index);

            if (!IsElementArrayBufferSubjectIndex(index))
            {
                updateCachedMappedArrayBuffersBinding(mState.mVertexBindings[index]);
            }
            onStateChange(context, angle::SubjectMessage::SubjectUnmapped);
            break;

        default:
            UNREACHABLE();
            break;
    }
}

void VertexArray::setDependentDirtyBit(const gl::Context *context,
                                       bool contentsChanged,
                                       angle::SubjectIndex index)
{
    DirtyBitType dirtyBit = getDirtyBitFromIndex(contentsChanged, index);
    ASSERT(!mDirtyBitsGuard.valid() || mDirtyBitsGuard.value().test(dirtyBit));
    mDirtyBits.set(dirtyBit);
    onStateChange(context, angle::SubjectMessage::ContentsChanged);
}

bool VertexArray::hasTransformFeedbackBindingConflict(const gl::Context *context) const
{
    // Fast check first.
    if (!mCachedTransformFeedbackConflictedBindingsMask.any())
    {
        return false;
    }

    const AttributesMask &activeAttribues = context->getStateCache().getActiveBufferedAttribsMask();

    // Slow check. We must ensure that the conflicting attributes are enabled/active.
    for (size_t attribIndex : activeAttribues)
    {
        const VertexAttribute &attrib = mState.mVertexAttributes[attribIndex];
        if (mCachedTransformFeedbackConflictedBindingsMask[attrib.bindingIndex])
        {
            return true;
        }
    }

    return false;
}

angle::Result VertexArray::getIndexRangeImpl(const Context *context,
                                             DrawElementsType type,
                                             GLsizei indexCount,
                                             const void *indices,
                                             IndexRange *indexRangeOut) const
{
    Buffer *elementArrayBuffer = mState.mElementArrayBuffer.get();
    if (!elementArrayBuffer)
    {
        *indexRangeOut = ComputeIndexRange(type, indices, indexCount,
                                           context->getState().isPrimitiveRestartEnabled());
        return angle::Result::Continue;
    }

    size_t offset = reinterpret_cast<uintptr_t>(indices);
    ANGLE_TRY(elementArrayBuffer->getIndexRange(context, type, offset, indexCount,
                                                context->getState().isPrimitiveRestartEnabled(),
                                                indexRangeOut));

    mIndexRangeCache.put(type, indexCount, offset, *indexRangeOut);
    return angle::Result::Continue;
}

VertexArray::IndexRangeCache::IndexRangeCache() = default;

void VertexArray::IndexRangeCache::put(DrawElementsType type,
                                       GLsizei indexCount,
                                       size_t offset,
                                       const IndexRange &indexRange)
{
    ASSERT(type != DrawElementsType::InvalidEnum);

    mTypeKey       = type;
    mIndexCountKey = indexCount;
    mOffsetKey     = offset;
    mPayload       = indexRange;
}
}  // namespace gl
kc3-lang/angle/src/libANGLE/VertexArray.cpp

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kc3-lang/angle /src/libANGLE/VertexArray.cpp
