/lib_angle/src/libANGLE/renderer/d3d/d3d11/Renderer11.cpp

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//
// Copyright (c) 2012-2014 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.
//

// Renderer11.cpp: Implements a back-end specific class for the D3D11 renderer.

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

#include "common/utilities.h"
#include "common/tls.h"
#include "libANGLE/Buffer.h"
#include "libANGLE/Display.h"
#include "libANGLE/Framebuffer.h"
#include "libANGLE/FramebufferAttachment.h"
#include "libANGLE/Program.h"
#include "libANGLE/State.h"
#include "libANGLE/Surface.h"
#include "libANGLE/formatutils.h"
#include "libANGLE/renderer/d3d/CompilerD3D.h"
#include "libANGLE/renderer/d3d/FramebufferD3D.h"
#include "libANGLE/renderer/d3d/IndexDataManager.h"
#include "libANGLE/renderer/d3d/ProgramD3D.h"
#include "libANGLE/renderer/d3d/RenderbufferD3D.h"
#include "libANGLE/renderer/d3d/ShaderD3D.h"
#include "libANGLE/renderer/d3d/SurfaceD3D.h"
#include "libANGLE/renderer/d3d/TextureD3D.h"
#include "libANGLE/renderer/d3d/TransformFeedbackD3D.h"
#include "libANGLE/renderer/d3d/VertexDataManager.h"
#include "libANGLE/renderer/d3d/d3d11/Blit11.h"
#include "libANGLE/renderer/d3d/d3d11/Buffer11.h"
#include "libANGLE/renderer/d3d/d3d11/Clear11.h"
#include "libANGLE/renderer/d3d/d3d11/Fence11.h"
#include "libANGLE/renderer/d3d/d3d11/Framebuffer11.h"
#include "libANGLE/renderer/d3d/d3d11/Image11.h"
#include "libANGLE/renderer/d3d/d3d11/IndexBuffer11.h"
#include "libANGLE/renderer/d3d/d3d11/PixelTransfer11.h"
#include "libANGLE/renderer/d3d/d3d11/Query11.h"
#include "libANGLE/renderer/d3d/d3d11/RenderTarget11.h"
#include "libANGLE/renderer/d3d/d3d11/ShaderExecutable11.h"
#include "libANGLE/renderer/d3d/d3d11/SwapChain11.h"
#include "libANGLE/renderer/d3d/d3d11/TextureStorage11.h"
#include "libANGLE/renderer/d3d/d3d11/Trim11.h"
#include "libANGLE/renderer/d3d/d3d11/VertexArray11.h"
#include "libANGLE/renderer/d3d/d3d11/VertexBuffer11.h"
#include "libANGLE/renderer/d3d/d3d11/formatutils11.h"
#include "libANGLE/renderer/d3d/d3d11/renderer11_utils.h"

#include <sstream>
#include <EGL/eglext.h>

// Enable ANGLE_SKIP_DXGI_1_2_CHECK if there is not a possibility of using cross-process
// HWNDs or the Windows 7 Platform Update (KB2670838) is expected to be installed.
#ifndef ANGLE_SKIP_DXGI_1_2_CHECK
#define ANGLE_SKIP_DXGI_1_2_CHECK 0
#endif

#ifdef _DEBUG
// this flag enables suppressing some spurious warnings that pop up in certain WebGL samples
// and conformance tests. to enable all warnings, remove this define.
#define ANGLE_SUPPRESS_D3D11_HAZARD_WARNINGS 1
#endif

namespace rx
{

namespace
{
static const DXGI_FORMAT RenderTargetFormats[] =
    {
        DXGI_FORMAT_B8G8R8A8_UNORM,
        DXGI_FORMAT_R8G8B8A8_UNORM
    };

static const DXGI_FORMAT DepthStencilFormats[] =
    {
        DXGI_FORMAT_UNKNOWN,
        DXGI_FORMAT_D24_UNORM_S8_UINT,
        DXGI_FORMAT_D16_UNORM
    };

enum
{
    MAX_TEXTURE_IMAGE_UNITS_VTF_SM4 = 16
};

static bool ImageIndexConflictsWithSRV(const gl::ImageIndex *index, D3D11_SHADER_RESOURCE_VIEW_DESC desc)
{
    unsigned mipLevel = index->mipIndex;
    unsigned layerIndex = index->layerIndex;
    GLenum type = index->type;

    switch (desc.ViewDimension)
    {
      case D3D11_SRV_DIMENSION_TEXTURE2D:
        {
            unsigned maxSrvMip = desc.Texture2D.MipLevels + desc.Texture2D.MostDetailedMip;
            maxSrvMip = (desc.Texture2D.MipLevels == -1) ? INT_MAX : maxSrvMip;

            unsigned mipMin = index->mipIndex;
            unsigned mipMax = (layerIndex == -1) ? INT_MAX : layerIndex;

            return type == GL_TEXTURE_2D && RangeUI(mipMin, mipMax).intersects(RangeUI(desc.Texture2D.MostDetailedMip, maxSrvMip));
        }

      case D3D11_SRV_DIMENSION_TEXTURE2DARRAY:
        {
            unsigned maxSrvMip = desc.Texture2DArray.MipLevels + desc.Texture2DArray.MostDetailedMip;
            maxSrvMip = (desc.Texture2DArray.MipLevels == -1) ? INT_MAX : maxSrvMip;

            unsigned maxSlice = desc.Texture2DArray.FirstArraySlice + desc.Texture2DArray.ArraySize;

            // Cube maps can be mapped to Texture2DArray SRVs
            return (type == GL_TEXTURE_2D_ARRAY || gl::IsCubeMapTextureTarget(type)) &&
                   desc.Texture2DArray.MostDetailedMip <= mipLevel && mipLevel < maxSrvMip &&
                   desc.Texture2DArray.FirstArraySlice <= layerIndex && layerIndex < maxSlice;
        }

      case D3D11_SRV_DIMENSION_TEXTURECUBE:
        {
            unsigned maxSrvMip = desc.TextureCube.MipLevels + desc.TextureCube.MostDetailedMip;
            maxSrvMip = (desc.TextureCube.MipLevels == -1) ? INT_MAX : maxSrvMip;

            return gl::IsCubeMapTextureTarget(type) &&
                   desc.TextureCube.MostDetailedMip <= mipLevel && mipLevel < maxSrvMip;
        }

      case D3D11_SRV_DIMENSION_TEXTURE3D:
        {
            unsigned maxSrvMip = desc.Texture3D.MipLevels + desc.Texture3D.MostDetailedMip;
            maxSrvMip = (desc.Texture3D.MipLevels == -1) ? INT_MAX : maxSrvMip;

            return type == GL_TEXTURE_3D &&
                   desc.Texture3D.MostDetailedMip <= mipLevel && mipLevel < maxSrvMip;
        }
      default:
        // We only handle the cases corresponding to valid image indexes
        UNIMPLEMENTED();
    }

    return false;
}

// Does *not* increment the resource ref count!!
ID3D11Resource *GetSRVResource(ID3D11ShaderResourceView *srv)
{
    ID3D11Resource *resource = NULL;
    ASSERT(srv);
    srv->GetResource(&resource);
    resource->Release();
    return resource;
}

}

Renderer11::Renderer11(egl::Display *display, EGLNativeDisplayType hDc, const egl::AttributeMap &attributes)
    : RendererD3D(display),
      mDc(hDc),
      mStateCache(this)
{
    mVertexDataManager = NULL;
    mIndexDataManager = NULL;

    mLineLoopIB = NULL;
    mTriangleFanIB = NULL;

    mBlit = NULL;
    mPixelTransfer = NULL;

    mClear = NULL;

    mTrim = NULL;

    mSyncQuery = NULL;

    mD3d11Module = NULL;
    mDxgiModule = NULL;

    mDevice = NULL;
    mDeviceContext = NULL;
    mDeviceContext1 = NULL;
    mDxgiAdapter = NULL;
    mDxgiFactory = NULL;

    mDriverConstantBufferVS = NULL;
    mDriverConstantBufferPS = NULL;

    mAppliedVertexShader = NULL;
    mAppliedGeometryShader = NULL;
    mAppliedPixelShader = NULL;

    EGLint requestedMajorVersion = attributes.get(EGL_PLATFORM_ANGLE_MAX_VERSION_MAJOR_ANGLE, EGL_DONT_CARE);
    EGLint requestedMinorVersion = attributes.get(EGL_PLATFORM_ANGLE_MAX_VERSION_MINOR_ANGLE, EGL_DONT_CARE);

    if (requestedMajorVersion == EGL_DONT_CARE || requestedMajorVersion >= 11)
    {
        if (requestedMinorVersion == EGL_DONT_CARE || requestedMinorVersion >= 0)
        {
            mAvailableFeatureLevels.push_back(D3D_FEATURE_LEVEL_11_0);
        }
    }

    if (requestedMajorVersion == EGL_DONT_CARE || requestedMajorVersion >= 10)
    {
        if (requestedMinorVersion == EGL_DONT_CARE || requestedMinorVersion >= 1)
        {
            mAvailableFeatureLevels.push_back(D3D_FEATURE_LEVEL_10_1);
        }
        if (requestedMinorVersion == EGL_DONT_CARE || requestedMinorVersion >= 0)
        {
            mAvailableFeatureLevels.push_back(D3D_FEATURE_LEVEL_10_0);
        }
    }

    if (requestedMajorVersion == 9 && requestedMinorVersion == 3)
    {
        mAvailableFeatureLevels.push_back(D3D_FEATURE_LEVEL_9_3);
    }

    mDriverType = (attributes.get(EGL_PLATFORM_ANGLE_USE_WARP_ANGLE, EGL_FALSE) == EGL_TRUE) ? D3D_DRIVER_TYPE_WARP
                                                                                             : D3D_DRIVER_TYPE_HARDWARE;
}

Renderer11::~Renderer11()
{
    release();
}

Renderer11 *Renderer11::makeRenderer11(Renderer *renderer)
{
    ASSERT(HAS_DYNAMIC_TYPE(Renderer11*, renderer));
    return static_cast<Renderer11*>(renderer);
}

#ifndef __d3d11_1_h__
#define D3D11_MESSAGE_ID_DEVICE_DRAW_RENDERTARGETVIEW_NOT_SET ((D3D11_MESSAGE_ID)3146081)
#endif

EGLint Renderer11::initialize()
{
    if (!mCompiler.initialize())
    {
        return EGL_NOT_INITIALIZED;
    }

#if !defined(ANGLE_ENABLE_WINDOWS_STORE)
    mDxgiModule = LoadLibrary(TEXT("dxgi.dll"));
    mD3d11Module = LoadLibrary(TEXT("d3d11.dll"));

    if (mD3d11Module == NULL || mDxgiModule == NULL)
    {
        ERR("Could not load D3D11 or DXGI library - aborting!\n");
        return EGL_NOT_INITIALIZED;
    }

    // create the D3D11 device
    ASSERT(mDevice == NULL);
    PFN_D3D11_CREATE_DEVICE D3D11CreateDevice = (PFN_D3D11_CREATE_DEVICE)GetProcAddress(mD3d11Module, "D3D11CreateDevice");

    if (D3D11CreateDevice == NULL)
    {
        ERR("Could not retrieve D3D11CreateDevice address - aborting!\n");
        return EGL_NOT_INITIALIZED;
    }
#endif

    HRESULT result = S_OK;
#ifdef _DEBUG
    result = D3D11CreateDevice(NULL,
                               mDriverType,
                               NULL,
                               D3D11_CREATE_DEVICE_DEBUG,
                               mAvailableFeatureLevels.data(),
                               mAvailableFeatureLevels.size(),
                               D3D11_SDK_VERSION,
                               &mDevice,
                               &mFeatureLevel,
                               &mDeviceContext);

    if (!mDevice || FAILED(result))
    {
        ERR("Failed creating Debug D3D11 device - falling back to release runtime.\n");
    }

    if (!mDevice || FAILED(result))
#endif
    {
        result = D3D11CreateDevice(NULL,
                                   mDriverType,
                                   NULL,
                                   0,
                                   mAvailableFeatureLevels.data(),
                                   mAvailableFeatureLevels.size(),
                                   D3D11_SDK_VERSION,
                                   &mDevice,
                                   &mFeatureLevel,
                                   &mDeviceContext);

        if (!mDevice || FAILED(result))
        {
            ERR("Could not create D3D11 device - aborting!\n");
            return EGL_NOT_INITIALIZED;   // Cleanup done by destructor through glDestroyRenderer
        }
    }

#if !defined(ANGLE_ENABLE_WINDOWS_STORE)
#if !ANGLE_SKIP_DXGI_1_2_CHECK
    // In order to create a swap chain for an HWND owned by another process, DXGI 1.2 is required.
    // The easiest way to check is to query for a IDXGIDevice2.
    bool requireDXGI1_2 = false;
    HWND hwnd = WindowFromDC(mDc);
    if (hwnd)
    {
        DWORD currentProcessId = GetCurrentProcessId();
        DWORD wndProcessId;
        GetWindowThreadProcessId(hwnd, &wndProcessId);
        requireDXGI1_2 = (currentProcessId != wndProcessId);
    }
    else
    {
        requireDXGI1_2 = true;
    }

    if (requireDXGI1_2)
    {
        IDXGIDevice2 *dxgiDevice2 = NULL;
        result = mDevice->QueryInterface(__uuidof(IDXGIDevice2), (void**)&dxgiDevice2);
        if (FAILED(result))
        {
            ERR("DXGI 1.2 required to present to HWNDs owned by another process.\n");
            return EGL_NOT_INITIALIZED;
        }
        SafeRelease(dxgiDevice2);
    }
#endif
#endif

    // Cast the DeviceContext to a DeviceContext1.
    // This could fail on Windows 7 without the Platform Update.
    // Don't error in this case- just don't use mDeviceContext1.
    mDeviceContext1 = d3d11::DynamicCastComObject<ID3D11DeviceContext1>(mDeviceContext);

    IDXGIDevice *dxgiDevice = NULL;
    result = mDevice->QueryInterface(__uuidof(IDXGIDevice), (void**)&dxgiDevice);

    if (FAILED(result))
    {
        ERR("Could not query DXGI device - aborting!\n");
        return EGL_NOT_INITIALIZED;
    }

    result = dxgiDevice->GetParent(__uuidof(IDXGIAdapter), (void**)&mDxgiAdapter);

    if (FAILED(result))
    {
        ERR("Could not retrieve DXGI adapter - aborting!\n");
        return EGL_NOT_INITIALIZED;
    }

    SafeRelease(dxgiDevice);

    IDXGIAdapter2 *dxgiAdapter2 = d3d11::DynamicCastComObject<IDXGIAdapter2>(mDxgiAdapter);

    // On D3D_FEATURE_LEVEL_9_*, IDXGIAdapter::GetDesc returns "Software Adapter" for the description string.
    // If DXGI1.2 is available then IDXGIAdapter2::GetDesc2 can be used to get the actual hardware values.
    if (mFeatureLevel <= D3D_FEATURE_LEVEL_9_3 && dxgiAdapter2 != NULL)
    {
        DXGI_ADAPTER_DESC2 adapterDesc2 = {0};
        dxgiAdapter2->GetDesc2(&adapterDesc2);

        // Copy the contents of the DXGI_ADAPTER_DESC2 into mAdapterDescription (a DXGI_ADAPTER_DESC).
        memcpy(mAdapterDescription.Description, adapterDesc2.Description, sizeof(mAdapterDescription.Description));
        mAdapterDescription.VendorId = adapterDesc2.VendorId;
        mAdapterDescription.DeviceId = adapterDesc2.DeviceId;
        mAdapterDescription.SubSysId = adapterDesc2.SubSysId;
        mAdapterDescription.Revision = adapterDesc2.Revision;
        mAdapterDescription.DedicatedVideoMemory = adapterDesc2.DedicatedVideoMemory;
        mAdapterDescription.DedicatedSystemMemory = adapterDesc2.DedicatedSystemMemory;
        mAdapterDescription.SharedSystemMemory = adapterDesc2.SharedSystemMemory;
        mAdapterDescription.AdapterLuid = adapterDesc2.AdapterLuid;
    }
    else
    {
        mDxgiAdapter->GetDesc(&mAdapterDescription);
    }

    SafeRelease(dxgiAdapter2);

    memset(mDescription, 0, sizeof(mDescription));
    wcstombs(mDescription, mAdapterDescription.Description, sizeof(mDescription) - 1);

    result = mDxgiAdapter->GetParent(__uuidof(IDXGIFactory), (void**)&mDxgiFactory);

    if (!mDxgiFactory || FAILED(result))
    {
        ERR("Could not create DXGI factory - aborting!\n");
        return EGL_NOT_INITIALIZED;
    }

    // Disable some spurious D3D11 debug warnings to prevent them from flooding the output log
#if defined(ANGLE_SUPPRESS_D3D11_HAZARD_WARNINGS) && defined(_DEBUG)
    ID3D11InfoQueue *infoQueue;
    result = mDevice->QueryInterface(__uuidof(ID3D11InfoQueue),  (void **)&infoQueue);

    if (SUCCEEDED(result))
    {
        D3D11_MESSAGE_ID hideMessages[] =
        {
            D3D11_MESSAGE_ID_DEVICE_DRAW_RENDERTARGETVIEW_NOT_SET
        };

        D3D11_INFO_QUEUE_FILTER filter = {0};
        filter.DenyList.NumIDs = ArraySize(hideMessages);
        filter.DenyList.pIDList = hideMessages;

        infoQueue->AddStorageFilterEntries(&filter);
        SafeRelease(infoQueue);
    }
#endif

    initializeDevice();

    return EGL_SUCCESS;
}

// do any one-time device initialization
// NOTE: this is also needed after a device lost/reset
// to reset the scene status and ensure the default states are reset.
void Renderer11::initializeDevice()
{
    mStateCache.initialize(mDevice);
    mInputLayoutCache.initialize(mDevice, mDeviceContext);

    ASSERT(!mVertexDataManager && !mIndexDataManager);
    mVertexDataManager = new VertexDataManager(this);
    mIndexDataManager = new IndexDataManager(this);

    ASSERT(!mBlit);
    mBlit = new Blit11(this);

    ASSERT(!mClear);
    mClear = new Clear11(this);

    ASSERT(!mTrim);
    mTrim = new Trim11(this);

    ASSERT(!mPixelTransfer);
    mPixelTransfer = new PixelTransfer11(this);

    const gl::Caps &rendererCaps = getRendererCaps();

    mForceSetVertexSamplerStates.resize(rendererCaps.maxVertexTextureImageUnits);
    mCurVertexSamplerStates.resize(rendererCaps.maxVertexTextureImageUnits);

    mForceSetPixelSamplerStates.resize(rendererCaps.maxTextureImageUnits);
    mCurPixelSamplerStates.resize(rendererCaps.maxTextureImageUnits);

    mCurVertexSRVs.resize(rendererCaps.maxVertexTextureImageUnits);
    mCurPixelSRVs.resize(rendererCaps.maxTextureImageUnits);

    markAllStateDirty();
}

std::vector<ConfigDesc> Renderer11::generateConfigs() const
{
    std::vector<ConfigDesc> configs;

    unsigned int numRenderFormats = ArraySize(RenderTargetFormats);
    unsigned int numDepthFormats = ArraySize(DepthStencilFormats);

    for (unsigned int formatIndex = 0; formatIndex < numRenderFormats; formatIndex++)
    {
        const d3d11::DXGIFormat &renderTargetFormatInfo = d3d11::GetDXGIFormatInfo(RenderTargetFormats[formatIndex]);
        const gl::TextureCaps &renderTargetFormatCaps = getRendererTextureCaps().get(renderTargetFormatInfo.internalFormat);
        if (renderTargetFormatCaps.renderable)
        {
            for (unsigned int depthStencilIndex = 0; depthStencilIndex < numDepthFormats; depthStencilIndex++)
            {
                const d3d11::DXGIFormat &depthStencilFormatInfo = d3d11::GetDXGIFormatInfo(DepthStencilFormats[depthStencilIndex]);
                const gl::TextureCaps &depthStencilFormatCaps = getRendererTextureCaps().get(depthStencilFormatInfo.internalFormat);
                if (depthStencilFormatCaps.renderable || DepthStencilFormats[depthStencilIndex] == DXGI_FORMAT_UNKNOWN)
                {
                    ConfigDesc newConfig;
                    newConfig.renderTargetFormat = renderTargetFormatInfo.internalFormat;
                    newConfig.depthStencilFormat = depthStencilFormatInfo.internalFormat;
                    newConfig.multiSample = 0;     // FIXME: enumerate multi-sampling
                    newConfig.fastConfig = true;   // Assume all DX11 format conversions to be fast

                    // Before we check mFeatureLevel, we need to ensure that the D3D device has been created.
                    ASSERT(mDevice != NULL);
                    newConfig.es2Conformant = (mFeatureLevel >= D3D_FEATURE_LEVEL_10_0);
                    newConfig.es3Capable = isES3Capable();

                    configs.push_back(newConfig);
                }
            }
        }
    }

    return configs;
}

gl::Error Renderer11::flush()
{
    mDeviceContext->Flush();
    return gl::Error(GL_NO_ERROR);
}

gl::Error Renderer11::finish()
{
    HRESULT result;

    if (!mSyncQuery)
    {
        D3D11_QUERY_DESC queryDesc;
        queryDesc.Query = D3D11_QUERY_EVENT;
        queryDesc.MiscFlags = 0;

        result = mDevice->CreateQuery(&queryDesc, &mSyncQuery);
        ASSERT(SUCCEEDED(result));
        if (FAILED(result))
        {
            return gl::Error(GL_OUT_OF_MEMORY, "Failed to create event query, result: 0x%X.", result);
        }
    }

    mDeviceContext->End(mSyncQuery);
    mDeviceContext->Flush();

    do
    {
        result = mDeviceContext->GetData(mSyncQuery, NULL, 0, D3D11_ASYNC_GETDATA_DONOTFLUSH);
        if (FAILED(result))
        {
            return gl::Error(GL_OUT_OF_MEMORY, "Failed to get event query data, result: 0x%X.", result);
        }

        // Keep polling, but allow other threads to do something useful first
        ScheduleYield();

        if (testDeviceLost())
        {
            mDisplay->notifyDeviceLost();
            return gl::Error(GL_OUT_OF_MEMORY, "Device was lost while waiting for sync.");
        }
    }
    while (result == S_FALSE);

    return gl::Error(GL_NO_ERROR);
}

SwapChainD3D *Renderer11::createSwapChain(NativeWindow nativeWindow, HANDLE shareHandle, GLenum backBufferFormat, GLenum depthBufferFormat)
{
    return new SwapChain11(this, nativeWindow, shareHandle, backBufferFormat, depthBufferFormat);
}

gl::Error Renderer11::generateSwizzle(gl::Texture *texture)
{
    if (texture)
    {
        TextureD3D *textureD3D = TextureD3D::makeTextureD3D(texture->getImplementation());
        ASSERT(textureD3D);

        TextureStorage *texStorage = textureD3D->getNativeTexture();
        if (texStorage)
        {
            TextureStorage11 *storage11 = TextureStorage11::makeTextureStorage11(texStorage);
            gl::Error error = storage11->generateSwizzles(texture->getSamplerState().swizzleRed,
                                                          texture->getSamplerState().swizzleGreen,
                                                          texture->getSamplerState().swizzleBlue,
                                                          texture->getSamplerState().swizzleAlpha);
            if (error.isError())
            {
                return error;
            }
        }
    }

    return gl::Error(GL_NO_ERROR);
}

gl::Error Renderer11::setSamplerState(gl::SamplerType type, int index, gl::Texture *texture, const gl::SamplerState &samplerStateParam)
{
    // Make sure to add the level offset for our tiny compressed texture workaround
    TextureD3D *textureD3D = TextureD3D::makeTextureD3D(texture->getImplementation());
    gl::SamplerState samplerStateInternal = samplerStateParam;
    samplerStateInternal.baseLevel += textureD3D->getNativeTexture()->getTopLevel();

    if (type == gl::SAMPLER_PIXEL)
    {
        ASSERT(static_cast<unsigned int>(index) < getRendererCaps().maxTextureImageUnits);

        if (mForceSetPixelSamplerStates[index] || memcmp(&samplerStateInternal, &mCurPixelSamplerStates[index], sizeof(gl::SamplerState)) != 0)
        {
            ID3D11SamplerState *dxSamplerState = NULL;
            gl::Error error = mStateCache.getSamplerState(samplerStateInternal, &dxSamplerState);
            if (error.isError())
            {
                return error;
            }

            ASSERT(dxSamplerState != NULL);
            mDeviceContext->PSSetSamplers(index, 1, &dxSamplerState);

            mCurPixelSamplerStates[index] = samplerStateInternal;
        }

        mForceSetPixelSamplerStates[index] = false;
    }
    else if (type == gl::SAMPLER_VERTEX)
    {
        ASSERT(static_cast<unsigned int>(index) < getRendererCaps().maxVertexTextureImageUnits);

        if (mForceSetVertexSamplerStates[index] || memcmp(&samplerStateInternal, &mCurVertexSamplerStates[index], sizeof(gl::SamplerState)) != 0)
        {
            ID3D11SamplerState *dxSamplerState = NULL;
            gl::Error error = mStateCache.getSamplerState(samplerStateInternal, &dxSamplerState);
            if (error.isError())
            {
                return error;
            }

            ASSERT(dxSamplerState != NULL);
            mDeviceContext->VSSetSamplers(index, 1, &dxSamplerState);

            mCurVertexSamplerStates[index] = samplerStateInternal;
        }

        mForceSetVertexSamplerStates[index] = false;
    }
    else UNREACHABLE();

    return gl::Error(GL_NO_ERROR);
}

gl::Error Renderer11::setTexture(gl::SamplerType type, int index, gl::Texture *texture)
{
    ID3D11ShaderResourceView *textureSRV = NULL;

    if (texture)
    {
        TextureD3D *textureImpl = TextureD3D::makeTextureD3D(texture->getImplementation());
        TextureStorage *texStorage = textureImpl->getNativeTexture();
        ASSERT(texStorage != NULL);

        TextureStorage11 *storage11 = TextureStorage11::makeTextureStorage11(texStorage);

        // Make sure to add the level offset for our tiny compressed texture workaround
        gl::SamplerState samplerState = texture->getSamplerState();
        samplerState.baseLevel += storage11->getTopLevel();

        gl::Error error = storage11->getSRV(samplerState, &textureSRV);
        if (error.isError())
        {
            return error;
        }

        // If we get NULL back from getSRV here, something went wrong in the texture class and we're unexpectedly
        // missing the shader resource view
        ASSERT(textureSRV != NULL);

        textureImpl->resetDirty();
    }

    ASSERT((type == gl::SAMPLER_PIXEL && static_cast<unsigned int>(index) < getRendererCaps().maxTextureImageUnits) ||
           (type == gl::SAMPLER_VERTEX && static_cast<unsigned int>(index) < getRendererCaps().maxVertexTextureImageUnits));

    setShaderResource(type, index, textureSRV);

    return gl::Error(GL_NO_ERROR);
}

gl::Error Renderer11::setUniformBuffers(const gl::Buffer *vertexUniformBuffers[], const gl::Buffer *fragmentUniformBuffers[])
{
    for (unsigned int uniformBufferIndex = 0; uniformBufferIndex < gl::IMPLEMENTATION_MAX_VERTEX_SHADER_UNIFORM_BUFFERS; uniformBufferIndex++)
    {
        const gl::Buffer *uniformBuffer = vertexUniformBuffers[uniformBufferIndex];
        if (uniformBuffer)
        {
            Buffer11 *bufferStorage = Buffer11::makeBuffer11(uniformBuffer->getImplementation());
            ID3D11Buffer *constantBuffer = bufferStorage->getBuffer(BUFFER_USAGE_UNIFORM);

            if (!constantBuffer)
            {
                return gl::Error(GL_OUT_OF_MEMORY);
            }

            if (mCurrentConstantBufferVS[uniformBufferIndex] != bufferStorage->getSerial())
            {
                mDeviceContext->VSSetConstantBuffers(getReservedVertexUniformBuffers() + uniformBufferIndex,
                                                     1, &constantBuffer);
                mCurrentConstantBufferVS[uniformBufferIndex] = bufferStorage->getSerial();
            }
        }
    }

    for (unsigned int uniformBufferIndex = 0; uniformBufferIndex < gl::IMPLEMENTATION_MAX_FRAGMENT_SHADER_UNIFORM_BUFFERS; uniformBufferIndex++)
    {
        const gl::Buffer *uniformBuffer = fragmentUniformBuffers[uniformBufferIndex];
        if (uniformBuffer)
        {
            Buffer11 *bufferStorage = Buffer11::makeBuffer11(uniformBuffer->getImplementation());
            ID3D11Buffer *constantBuffer = bufferStorage->getBuffer(BUFFER_USAGE_UNIFORM);

            if (!constantBuffer)
            {
                return gl::Error(GL_OUT_OF_MEMORY);
            }

            if (mCurrentConstantBufferPS[uniformBufferIndex] != bufferStorage->getSerial())
            {
                mDeviceContext->PSSetConstantBuffers(getReservedFragmentUniformBuffers() + uniformBufferIndex,
                                                     1, &constantBuffer);
                mCurrentConstantBufferPS[uniformBufferIndex] = bufferStorage->getSerial();
            }
        }
    }

    return gl::Error(GL_NO_ERROR);
}

gl::Error Renderer11::setRasterizerState(const gl::RasterizerState &rasterState)
{
    if (mForceSetRasterState || memcmp(&rasterState, &mCurRasterState, sizeof(gl::RasterizerState)) != 0)
    {
        ID3D11RasterizerState *dxRasterState = NULL;
        gl::Error error = mStateCache.getRasterizerState(rasterState, mScissorEnabled, &dxRasterState);
        if (error.isError())
        {
            return error;
        }

        mDeviceContext->RSSetState(dxRasterState);

        mCurRasterState = rasterState;
    }

    mForceSetRasterState = false;

    return gl::Error(GL_NO_ERROR);
}

gl::Error Renderer11::setBlendState(const gl::Framebuffer *framebuffer, const gl::BlendState &blendState, const gl::ColorF &blendColor,
                                    unsigned int sampleMask)
{
    if (mForceSetBlendState ||
        memcmp(&blendState, &mCurBlendState, sizeof(gl::BlendState)) != 0 ||
        memcmp(&blendColor, &mCurBlendColor, sizeof(gl::ColorF)) != 0 ||
        sampleMask != mCurSampleMask)
    {
        ID3D11BlendState *dxBlendState = NULL;
        gl::Error error = mStateCache.getBlendState(framebuffer, blendState, &dxBlendState);
        if (error.isError())
        {
            return error;
        }

        ASSERT(dxBlendState != NULL);

        float blendColors[4] = {0.0f};
        if (blendState.sourceBlendRGB != GL_CONSTANT_ALPHA && blendState.sourceBlendRGB != GL_ONE_MINUS_CONSTANT_ALPHA &&
            blendState.destBlendRGB != GL_CONSTANT_ALPHA && blendState.destBlendRGB != GL_ONE_MINUS_CONSTANT_ALPHA)
        {
            blendColors[0] = blendColor.red;
            blendColors[1] = blendColor.green;
            blendColors[2] = blendColor.blue;
            blendColors[3] = blendColor.alpha;
        }
        else
        {
            blendColors[0] = blendColor.alpha;
            blendColors[1] = blendColor.alpha;
            blendColors[2] = blendColor.alpha;
            blendColors[3] = blendColor.alpha;
        }

        mDeviceContext->OMSetBlendState(dxBlendState, blendColors, sampleMask);

        mCurBlendState = blendState;
        mCurBlendColor = blendColor;
        mCurSampleMask = sampleMask;
    }

    mForceSetBlendState = false;

    return gl::Error(GL_NO_ERROR);
}

gl::Error Renderer11::setDepthStencilState(const gl::DepthStencilState &depthStencilState, int stencilRef,
                                           int stencilBackRef, bool frontFaceCCW)
{
    if (mForceSetDepthStencilState ||
        memcmp(&depthStencilState, &mCurDepthStencilState, sizeof(gl::DepthStencilState)) != 0 ||
        stencilRef != mCurStencilRef || stencilBackRef != mCurStencilBackRef)
    {
        ASSERT(depthStencilState.stencilWritemask == depthStencilState.stencilBackWritemask);
        ASSERT(stencilRef == stencilBackRef);
        ASSERT(depthStencilState.stencilMask == depthStencilState.stencilBackMask);

        ID3D11DepthStencilState *dxDepthStencilState = NULL;
        gl::Error error = mStateCache.getDepthStencilState(depthStencilState, &dxDepthStencilState);
        if (error.isError())
        {
            return error;
        }

        ASSERT(dxDepthStencilState);

        // Max D3D11 stencil reference value is 0xFF, corresponding to the max 8 bits in a stencil buffer
        // GL specifies we should clamp the ref value to the nearest bit depth when doing stencil ops
        META_ASSERT(D3D11_DEFAULT_STENCIL_READ_MASK == 0xFF);
        META_ASSERT(D3D11_DEFAULT_STENCIL_WRITE_MASK == 0xFF);
        UINT dxStencilRef = std::min<UINT>(stencilRef, 0xFFu);

        mDeviceContext->OMSetDepthStencilState(dxDepthStencilState, dxStencilRef);

        mCurDepthStencilState = depthStencilState;
        mCurStencilRef = stencilRef;
        mCurStencilBackRef = stencilBackRef;
    }

    mForceSetDepthStencilState = false;

    return gl::Error(GL_NO_ERROR);
}

void Renderer11::setScissorRectangle(const gl::Rectangle &scissor, bool enabled)
{
    if (mForceSetScissor || memcmp(&scissor, &mCurScissor, sizeof(gl::Rectangle)) != 0 ||
        enabled != mScissorEnabled)
    {
        if (enabled)
        {
            D3D11_RECT rect;
            rect.left = std::max(0, scissor.x);
            rect.top = std::max(0, scissor.y);
            rect.right = scissor.x + std::max(0, scissor.width);
            rect.bottom = scissor.y + std::max(0, scissor.height);

            mDeviceContext->RSSetScissorRects(1, &rect);
        }

        if (enabled != mScissorEnabled)
        {
            mForceSetRasterState = true;
        }

        mCurScissor = scissor;
        mScissorEnabled = enabled;
    }

    mForceSetScissor = false;
}

void Renderer11::setViewport(const gl::Rectangle &viewport, float zNear, float zFar, GLenum drawMode, GLenum frontFace,
                             bool ignoreViewport)
{
    gl::Rectangle actualViewport = viewport;
    float actualZNear = gl::clamp01(zNear);
    float actualZFar = gl::clamp01(zFar);
    if (ignoreViewport)
    {
        actualViewport.x = 0;
        actualViewport.y = 0;
        actualViewport.width = mRenderTargetDesc.width;
        actualViewport.height = mRenderTargetDesc.height;
        actualZNear = 0.0f;
        actualZFar = 1.0f;
    }

    bool viewportChanged = mForceSetViewport || memcmp(&actualViewport, &mCurViewport, sizeof(gl::Rectangle)) != 0 ||
                           actualZNear != mCurNear || actualZFar != mCurFar;

    if (viewportChanged)
    {
        const gl::Caps& caps = getRendererCaps();

        int dxMaxViewportBoundsX = static_cast<int>(caps.maxViewportWidth);
        int dxMaxViewportBoundsY = static_cast<int>(caps.maxViewportHeight);
        int dxMinViewportBoundsX = -dxMaxViewportBoundsX;
        int dxMinViewportBoundsY = -dxMaxViewportBoundsY;

        if (mFeatureLevel <= D3D_FEATURE_LEVEL_9_3)
        {
            // Feature Level 9 viewports shouldn't exceed the dimensions of the rendertarget.
            dxMaxViewportBoundsX = mRenderTargetDesc.width;
            dxMaxViewportBoundsY = mRenderTargetDesc.height;
            dxMinViewportBoundsX = 0;
            dxMinViewportBoundsY = 0;
        }

        int dxViewportTopLeftX = gl::clamp(actualViewport.x, dxMinViewportBoundsX, dxMaxViewportBoundsX);
        int dxViewportTopLeftY = gl::clamp(actualViewport.y, dxMinViewportBoundsY, dxMaxViewportBoundsY);
        int dxViewportWidth =    gl::clamp(actualViewport.width, 0, dxMaxViewportBoundsX - dxViewportTopLeftX);
        int dxViewportHeight =   gl::clamp(actualViewport.height, 0, dxMaxViewportBoundsY - dxViewportTopLeftY);

        D3D11_VIEWPORT dxViewport;
        dxViewport.TopLeftX = static_cast<float>(dxViewportTopLeftX);
        dxViewport.TopLeftY = static_cast<float>(dxViewportTopLeftY);
        dxViewport.Width =    static_cast<float>(dxViewportWidth);
        dxViewport.Height =   static_cast<float>(dxViewportHeight);
        dxViewport.MinDepth = actualZNear;
        dxViewport.MaxDepth = actualZFar;

        mDeviceContext->RSSetViewports(1, &dxViewport);

        mCurViewport = actualViewport;
        mCurNear = actualZNear;
        mCurFar = actualZFar;

        // On Feature Level 9_*, we must emulate large and/or negative viewports in the shaders using viewAdjust (like the D3D9 renderer).
        if (mFeatureLevel <= D3D_FEATURE_LEVEL_9_3)
        {
            mVertexConstants.viewAdjust[0] = static_cast<float>((actualViewport.width  - dxViewportWidth)  + 2 * (actualViewport.x - dxViewportTopLeftX)) / dxViewport.Width;
            mVertexConstants.viewAdjust[1] = static_cast<float>((actualViewport.height - dxViewportHeight) + 2 * (actualViewport.y - dxViewportTopLeftY)) / dxViewport.Height;
            mVertexConstants.viewAdjust[2] = static_cast<float>(actualViewport.width) / dxViewport.Width;
            mVertexConstants.viewAdjust[3] = static_cast<float>(actualViewport.height) / dxViewport.Height;
        }

        mPixelConstants.viewCoords[0] = actualViewport.width  * 0.5f;
        mPixelConstants.viewCoords[1] = actualViewport.height * 0.5f;
        mPixelConstants.viewCoords[2] = actualViewport.x + (actualViewport.width  * 0.5f);
        mPixelConstants.viewCoords[3] = actualViewport.y + (actualViewport.height * 0.5f);

        // Instanced pointsprite emulation requires ViewCoords to be defined in the
        // the vertex shader.
        mVertexConstants.viewCoords[0] = mPixelConstants.viewCoords[0];
        mVertexConstants.viewCoords[1] = mPixelConstants.viewCoords[1];
        mVertexConstants.viewCoords[2] = mPixelConstants.viewCoords[2];
        mVertexConstants.viewCoords[3] = mPixelConstants.viewCoords[3];

        mPixelConstants.depthFront[0] = (actualZFar - actualZNear) * 0.5f;
        mPixelConstants.depthFront[1] = (actualZNear + actualZFar) * 0.5f;

        mVertexConstants.depthRange[0] = actualZNear;
        mVertexConstants.depthRange[1] = actualZFar;
        mVertexConstants.depthRange[2] = actualZFar - actualZNear;

        mPixelConstants.depthRange[0] = actualZNear;
        mPixelConstants.depthRange[1] = actualZFar;
        mPixelConstants.depthRange[2] = actualZFar - actualZNear;
    }

    mForceSetViewport = false;
}

bool Renderer11::applyPrimitiveType(GLenum mode, GLsizei count, bool usesPointSize)
{
    D3D11_PRIMITIVE_TOPOLOGY primitiveTopology = D3D_PRIMITIVE_TOPOLOGY_UNDEFINED;

    GLsizei minCount = 0;

    switch (mode)
    {
      case GL_POINTS:         primitiveTopology = D3D11_PRIMITIVE_TOPOLOGY_POINTLIST;   minCount = 1; break;
      case GL_LINES:          primitiveTopology = D3D_PRIMITIVE_TOPOLOGY_LINELIST;      minCount = 2; break;
      case GL_LINE_LOOP:      primitiveTopology = D3D_PRIMITIVE_TOPOLOGY_LINESTRIP;     minCount = 2; break;
      case GL_LINE_STRIP:     primitiveTopology = D3D_PRIMITIVE_TOPOLOGY_LINESTRIP;     minCount = 2; break;
      case GL_TRIANGLES:      primitiveTopology = D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST;  minCount = 3; break;
      case GL_TRIANGLE_STRIP: primitiveTopology = D3D_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP; minCount = 3; break;
          // emulate fans via rewriting index buffer
      case GL_TRIANGLE_FAN:   primitiveTopology = D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST;  minCount = 3; break;
      default:
        UNREACHABLE();
        return false;
    }

    // If instanced pointsprite emulation is being used and  If gl_PointSize is used in the shader,
    // GL_POINTS mode is expected to render pointsprites.
    // Instanced PointSprite emulation requires that the topology to be D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST.
    if (mode == GL_POINTS && usesPointSize && getWorkarounds().useInstancedPointSpriteEmulation)
    {
        primitiveTopology = D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST;
    }

    if (primitiveTopology != mCurrentPrimitiveTopology)
    {
        mDeviceContext->IASetPrimitiveTopology(primitiveTopology);
        mCurrentPrimitiveTopology = primitiveTopology;
    }

    return count >= minCount;
}

void Renderer11::unsetConflictingSRVs(gl::SamplerType samplerType, const ID3D11Resource *resource, const gl::ImageIndex* index)
{
    auto &currentSRVs = (samplerType == gl::SAMPLER_VERTEX ? mCurVertexSRVs : mCurPixelSRVs);

    for (size_t resourceIndex = 0; resourceIndex < currentSRVs.size(); ++resourceIndex)
    {
        auto &record = currentSRVs[resourceIndex];

        if (record.srv && record.resource == resource && ImageIndexConflictsWithSRV(index, record.desc))
        {
            setShaderResource(samplerType, static_cast<UINT>(resourceIndex), NULL);
        }
    }
}

gl::Error Renderer11::applyRenderTarget(const gl::Framebuffer *framebuffer)
{
    // Get the color render buffer and serial
    // Also extract the render target dimensions and view
    unsigned int renderTargetWidth = 0;
    unsigned int renderTargetHeight = 0;
    DXGI_FORMAT renderTargetFormat = DXGI_FORMAT_UNKNOWN;
    unsigned int renderTargetSerials[gl::IMPLEMENTATION_MAX_DRAW_BUFFERS] = {0};
    ID3D11RenderTargetView* framebufferRTVs[gl::IMPLEMENTATION_MAX_DRAW_BUFFERS] = {NULL};
    bool missingColorRenderTarget = true;

    const gl::ColorbufferInfo &colorbuffers = framebuffer->getColorbuffersForRender(getWorkarounds());

    for (size_t colorAttachment = 0; colorAttachment < colorbuffers.size(); ++colorAttachment)
    {
        gl::FramebufferAttachment *colorbuffer = colorbuffers[colorAttachment];

        if (colorbuffer)
        {
            // the draw buffer must be either "none", "back" for the default buffer or the same index as this color (in order)

            // check for zero-sized default framebuffer, which is a special case.
            // in this case we do not wish to modify any state and just silently return false.
            // this will not report any gl error but will cause the calling method to return.
            if (colorbuffer->getWidth() == 0 || colorbuffer->getHeight() == 0)
            {
                return gl::Error(GL_NO_ERROR);
            }

            renderTargetSerials[colorAttachment] = GetAttachmentSerial(colorbuffer);

            // Extract the render target dimensions and view
            RenderTarget11 *renderTarget = NULL;
            gl::Error error = d3d11::GetAttachmentRenderTarget(colorbuffer, &renderTarget);
            if (error.isError())
            {
                return error;
            }
            ASSERT(renderTarget);

            framebufferRTVs[colorAttachment] = renderTarget->getRenderTargetView();
            ASSERT(framebufferRTVs[colorAttachment]);

            if (missingColorRenderTarget)
            {
                renderTargetWidth = renderTarget->getWidth();
                renderTargetHeight = renderTarget->getHeight();
                renderTargetFormat = renderTarget->getDXGIFormat();
                missingColorRenderTarget = false;
            }

            // Unbind render target SRVs from the shader here to prevent D3D11 warnings.
            if (colorbuffer->type() == GL_TEXTURE)
            {
                ID3D11Resource *renderTargetResource = renderTarget->getTexture();
                const gl::ImageIndex *index = colorbuffer->getTextureImageIndex();
                ASSERT(index);
                // The index doesn't need to be corrected for the small compressed texture workaround
                // because a rendertarget is never compressed.
                unsetConflictingSRVs(gl::SAMPLER_VERTEX, renderTargetResource, index);
                unsetConflictingSRVs(gl::SAMPLER_PIXEL, renderTargetResource, index);
            }

        }
    }

    // Get the depth stencil render buffter and serials
    gl::FramebufferAttachment *depthStencil = framebuffer->getDepthbuffer();
    unsigned int depthbufferSerial = 0;
    unsigned int stencilbufferSerial = 0;
    if (depthStencil)
    {
        depthbufferSerial = GetAttachmentSerial(depthStencil);
    }
    else if (framebuffer->getStencilbuffer())
    {
        depthStencil = framebuffer->getStencilbuffer();
        stencilbufferSerial = GetAttachmentSerial(depthStencil);
    }

    ID3D11DepthStencilView* framebufferDSV = NULL;
    if (depthStencil)
    {
        RenderTarget11 *depthStencilRenderTarget = NULL;
        gl::Error error = d3d11::GetAttachmentRenderTarget(depthStencil, &depthStencilRenderTarget);
        if (error.isError())
        {
            SafeRelease(framebufferRTVs);
            return error;
        }
        ASSERT(depthStencilRenderTarget);

        framebufferDSV = depthStencilRenderTarget->getDepthStencilView();
        ASSERT(framebufferDSV);

        // If there is no render buffer, the width, height and format values come from
        // the depth stencil
        if (missingColorRenderTarget)
        {
            renderTargetWidth = depthStencilRenderTarget->getWidth();
            renderTargetHeight = depthStencilRenderTarget->getHeight();
            renderTargetFormat = depthStencilRenderTarget->getDXGIFormat();
        }
    }

    // Apply the render target and depth stencil
    if (!mRenderTargetDescInitialized || !mDepthStencilInitialized ||
        memcmp(renderTargetSerials, mAppliedRenderTargetSerials, sizeof(renderTargetSerials)) != 0 ||
        depthbufferSerial != mAppliedDepthbufferSerial ||
        stencilbufferSerial != mAppliedStencilbufferSerial)
    {
        mDeviceContext->OMSetRenderTargets(getRendererCaps().maxDrawBuffers, framebufferRTVs, framebufferDSV);

        mRenderTargetDesc.width = renderTargetWidth;
        mRenderTargetDesc.height = renderTargetHeight;
        mRenderTargetDesc.format = renderTargetFormat;
        mForceSetViewport = true;
        mForceSetScissor = true;
        mForceSetBlendState = true;

        if (!mDepthStencilInitialized)
        {
            mForceSetRasterState = true;
        }

        for (unsigned int rtIndex = 0; rtIndex < gl::IMPLEMENTATION_MAX_DRAW_BUFFERS; rtIndex++)
        {
            mAppliedRenderTargetSerials[rtIndex] = renderTargetSerials[rtIndex];
        }
        mAppliedDepthbufferSerial = depthbufferSerial;
        mAppliedStencilbufferSerial = stencilbufferSerial;
        mRenderTargetDescInitialized = true;
        mDepthStencilInitialized = true;
    }

    invalidateFramebufferSwizzles(framebuffer);

    return gl::Error(GL_NO_ERROR);
}

gl::Error Renderer11::applyVertexBuffer(const gl::State &state, GLint first, GLsizei count, GLsizei instances)
{
    TranslatedAttribute attributes[gl::MAX_VERTEX_ATTRIBS];
    gl::Error error = mVertexDataManager->prepareVertexData(state, first, count, attributes, instances);
    if (error.isError())
    {
        return error;
    }

    return mInputLayoutCache.applyVertexBuffers(attributes, state.getProgram());
}

gl::Error Renderer11::applyIndexBuffer(const GLvoid *indices, gl::Buffer *elementArrayBuffer, GLsizei count, GLenum mode, GLenum type, TranslatedIndexData *indexInfo)
{
    gl::Error error = mIndexDataManager->prepareIndexData(type, count, elementArrayBuffer, indices, indexInfo);
    if (error.isError())
    {
        return error;
    }

    ID3D11Buffer *buffer = NULL;
    DXGI_FORMAT bufferFormat = (indexInfo->indexType == GL_UNSIGNED_INT) ? DXGI_FORMAT_R32_UINT : DXGI_FORMAT_R16_UINT;

    if (indexInfo->storage)
    {
        Buffer11 *storage = Buffer11::makeBuffer11(indexInfo->storage);
        buffer = storage->getBuffer(BUFFER_USAGE_INDEX);
    }
    else
    {
        IndexBuffer11* indexBuffer = IndexBuffer11::makeIndexBuffer11(indexInfo->indexBuffer);
        buffer = indexBuffer->getBuffer();
    }

    if (buffer != mAppliedIB || bufferFormat != mAppliedIBFormat || indexInfo->startOffset != mAppliedIBOffset)
    {
        mDeviceContext->IASetIndexBuffer(buffer, bufferFormat, indexInfo->startOffset);

        mAppliedIB = buffer;
        mAppliedIBFormat = bufferFormat;
        mAppliedIBOffset = indexInfo->startOffset;
    }

    return gl::Error(GL_NO_ERROR);
}

void Renderer11::applyTransformFeedbackBuffers(const gl::State& state)
{
    size_t numXFBBindings = state.getTransformFeedbackBufferIndexRange();
    ASSERT(numXFBBindings <= gl::IMPLEMENTATION_MAX_TRANSFORM_FEEDBACK_BUFFERS);

    bool requiresUpdate = false;
    for (size_t i = 0; i < numXFBBindings; i++)
    {
        gl::Buffer *curXFBBuffer = state.getIndexedTransformFeedbackBuffer(i);
        GLintptr curXFBOffset = state.getIndexedTransformFeedbackBufferOffset(i);
        ID3D11Buffer *d3dBuffer = NULL;
        if (curXFBBuffer)
        {
            Buffer11 *storage = Buffer11::makeBuffer11(curXFBBuffer->getImplementation());
            d3dBuffer = storage->getBuffer(BUFFER_USAGE_VERTEX_OR_TRANSFORM_FEEDBACK);
        }

        // TODO: mAppliedTFBuffers and friends should also be kept in a vector.
        if (d3dBuffer != mAppliedTFBuffers[i] || curXFBOffset != mAppliedTFOffsets[i])
        {
            requiresUpdate = true;
        }
    }

    if (requiresUpdate)
    {
        for (size_t i = 0; i < numXFBBindings; ++i)
        {
            gl::Buffer *curXFBBuffer = state.getIndexedTransformFeedbackBuffer(i);
            GLintptr curXFBOffset = state.getIndexedTransformFeedbackBufferOffset(i);

            if (curXFBBuffer)
            {
                Buffer11 *storage = Buffer11::makeBuffer11(curXFBBuffer->getImplementation());
                ID3D11Buffer *d3dBuffer = storage->getBuffer(BUFFER_USAGE_VERTEX_OR_TRANSFORM_FEEDBACK);

                mCurrentD3DOffsets[i] = (mAppliedTFBuffers[i] != d3dBuffer || mAppliedTFOffsets[i] != curXFBOffset) ?
                                        static_cast<UINT>(curXFBOffset) : -1;
                mAppliedTFBuffers[i] = d3dBuffer;
            }
            else
            {
                mAppliedTFBuffers[i] = NULL;
                mCurrentD3DOffsets[i] = 0;
            }
            mAppliedTFOffsets[i] = curXFBOffset;
        }

        mDeviceContext->SOSetTargets(numXFBBindings, mAppliedTFBuffers, mCurrentD3DOffsets);
    }
}

gl::Error Renderer11::drawArrays(const gl::Data &data, GLenum mode, GLsizei count, GLsizei instances, bool transformFeedbackActive, bool usesPointSize)
{
    bool useInstancedPointSpriteEmulation = usesPointSize && getWorkarounds().useInstancedPointSpriteEmulation;
    if (mode == GL_POINTS && transformFeedbackActive)
    {
        // Since point sprites are generated with a geometry shader, too many vertices will
        // be written if transform feedback is active.  To work around this, draw only the points
        // with the stream out shader and no pixel shader to feed the stream out buffers and then 
        // draw again with the point sprite geometry shader to rasterize the point sprites.

        mDeviceContext->PSSetShader(NULL, NULL, 0);

        if (instances > 0)
        {
            mDeviceContext->DrawInstanced(count, instances, 0, 0);
        }
        else
        {
            mDeviceContext->Draw(count, 0);
        }

        ProgramD3D *programD3D = ProgramD3D::makeProgramD3D(data.state->getProgram()->getImplementation());

        rx::ShaderExecutableD3D *pixelExe = NULL;
        gl::Error error = programD3D->getPixelExecutableForFramebuffer(data.state->getDrawFramebuffer(), &pixelExe);
        if (error.isError())
        {
            return error;
        }

        // Skip this step if we're doing rasterizer discard.
        if (pixelExe && !data.state->getRasterizerState().rasterizerDiscard)
        {
            ID3D11PixelShader *pixelShader = ShaderExecutable11::makeShaderExecutable11(pixelExe)->getPixelShader();
            ASSERT(reinterpret_cast<uintptr_t>(pixelShader) == mAppliedPixelShader);
            mDeviceContext->PSSetShader(pixelShader, NULL, 0);

            // Retrieve the point sprite geometry shader
            rx::ShaderExecutableD3D *geometryExe = programD3D->getGeometryExecutable();
            ID3D11GeometryShader *geometryShader = (geometryExe ? ShaderExecutable11::makeShaderExecutable11(geometryExe)->getGeometryShader() : NULL);
            mAppliedGeometryShader = reinterpret_cast<uintptr_t>(geometryShader);
            ASSERT(geometryShader);
            mDeviceContext->GSSetShader(geometryShader, NULL, 0);

            if (instances > 0)
            {
                mDeviceContext->DrawInstanced(count, instances, 0, 0);
            }
            else
            {
                mDeviceContext->Draw(count, 0);
            }
        }

        return gl::Error(GL_NO_ERROR);
    }
    else if (mode == GL_LINE_LOOP)
    {
        return drawLineLoop(count, GL_NONE, NULL, 0, NULL);
    }
    else if (mode == GL_TRIANGLE_FAN)
    {
        return drawTriangleFan(count, GL_NONE, NULL, 0, NULL, instances);
    }
    else if (instances > 0)
    {
        mDeviceContext->DrawInstanced(count, instances, 0, 0);
        return gl::Error(GL_NO_ERROR);
    }
    else
    {
        // If gl_PointSize is used and GL_POINTS is specified, then it is expected to render pointsprites.
        // If instanced pointsprite emulation is being used the topology is expexted to be 
        // D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST and DrawIndexedInstanced must be used.
        if (mode == GL_POINTS && useInstancedPointSpriteEmulation)
        {
            mDeviceContext->DrawIndexedInstanced(6, count, 0, 0, 0);
        }
        else
        {
            mDeviceContext->Draw(count, 0);
        }
        r…