VertexBuffer11.cpp

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//

// Copyright 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.

//

// VertexBuffer11.cpp: Defines the D3D11 VertexBuffer implementation.

#include "libANGLE/renderer/d3d/d3d11/VertexBuffer11.h"

#include "libANGLE/Buffer.h"

#include "libANGLE/Context.h"

#include "libANGLE/VertexAttribute.h"

#include "libANGLE/formatutils.h"

#include "libANGLE/renderer/d3d/d3d11/Buffer11.h"

#include "libANGLE/renderer/d3d/d3d11/Context11.h"

#include "libANGLE/renderer/d3d/d3d11/Renderer11.h"

#include "libANGLE/renderer/d3d/d3d11/formatutils11.h"

#include "libANGLE/renderer/d3d/d3d11/renderer11_utils.h"

namespace rx

VertexBuffer11::VertexBuffer11(Renderer11 *const renderer)

    : mRenderer(renderer),

      mBuffer(),

      mBufferSize(0),

      mDynamicUsage(false),

      mMappedResourceData(nullptr)

{}

VertexBuffer11::~VertexBuffer11()

    ASSERT(mMappedResourceData == nullptr);

angle::Result VertexBuffer11::initialize(const gl::Context *context,

                                         unsigned int size,

                                         bool dynamicUsage)

    mBuffer.reset();

    updateSerial();

    if (size > 0)

        D3D11_BUFFER_DESC bufferDesc;

        bufferDesc.ByteWidth           = size;

        bufferDesc.Usage               = D3D11_USAGE_DYNAMIC;

        bufferDesc.BindFlags           = D3D11_BIND_VERTEX_BUFFER;

        bufferDesc.CPUAccessFlags      = D3D11_CPU_ACCESS_WRITE;

        bufferDesc.MiscFlags           = 0;

        bufferDesc.StructureByteStride = 0;

        ANGLE_TRY(mRenderer->allocateResource(GetImplAs<Context11>(context), bufferDesc, &mBuffer));

        if (dynamicUsage)

            mBuffer.setInternalName("VertexBuffer11(dynamic)");

        else

            mBuffer.setInternalName("VertexBuffer11(static)");

    mBufferSize   = size;

    mDynamicUsage = dynamicUsage;

    return angle::Result::Continue;

angle::Result VertexBuffer11::mapResource(const gl::Context *context)

    if (mMappedResourceData == nullptr)

        D3D11_MAPPED_SUBRESOURCE mappedResource;

        ANGLE_TRY(mRenderer->mapResource(context, mBuffer.get(), 0, D3D11_MAP_WRITE_NO_OVERWRITE, 0,

                                         &mappedResource));

        mMappedResourceData = static_cast<uint8_t *>(mappedResource.pData);

    return angle::Result::Continue;

void VertexBuffer11::hintUnmapResource()

    if (mMappedResourceData != nullptr)

        ID3D11DeviceContext *dxContext = mRenderer->getDeviceContext();

        dxContext->Unmap(mBuffer.get(), 0);

        mMappedResourceData = nullptr;

angle::Result VertexBuffer11::storeVertexAttributes(const gl::Context *context,

                                                    const gl::VertexAttribute &attrib,

                                                    const gl::VertexBinding &binding,

                                                    gl::VertexAttribType currentValueType,

                                                    GLint start,

                                                    size_t count,

                                                    GLsizei instances,

                                                    unsigned int offset,

                                                    const uint8_t *sourceData)

    ASSERT(mBuffer.valid());

    int inputStride = static_cast<int>(ComputeVertexAttributeStride(attrib, binding));

    // This will map the resource if it isn't already mapped.

    ANGLE_TRY(mapResource(context));

    uint8_t *output = mMappedResourceData + offset;

    const uint8_t *input = sourceData;

    if (instances == 0 || binding.getDivisor() == 0)

        input += inputStride * start;

    angle::FormatID vertexFormatID       = gl::GetVertexFormatID(attrib, currentValueType);

    const D3D_FEATURE_LEVEL featureLevel = mRenderer->getRenderer11DeviceCaps().featureLevel;

    const d3d11::VertexFormat &vertexFormatInfo =

        d3d11::GetVertexFormatInfo(vertexFormatID, featureLevel);

    ASSERT(vertexFormatInfo.copyFunction != nullptr);

    vertexFormatInfo.copyFunction(input, inputStride, count, output);

    return angle::Result::Continue;

unsigned int VertexBuffer11::getBufferSize() const

    return mBufferSize;

angle::Result VertexBuffer11::setBufferSize(const gl::Context *context, unsigned int size)

    if (size > mBufferSize)

        return initialize(context, size, mDynamicUsage);

    return angle::Result::Continue;

angle::Result VertexBuffer11::discard(const gl::Context *context)

    ASSERT(mBuffer.valid());

    D3D11_MAPPED_SUBRESOURCE mappedResource;

    ANGLE_TRY(mRenderer->mapResource(context, mBuffer.get(), 0, D3D11_MAP_WRITE_DISCARD, 0,

                                     &mappedResource));

    mRenderer->getDeviceContext()->Unmap(mBuffer.get(), 0);

    return angle::Result::Continue;

const d3d11::Buffer &VertexBuffer11::getBuffer() const

    return mBuffer;

}  // namespace rx