//
// 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.
//

// Renderer9.cpp: Implements a back-end specific class for the D3D9 renderer.

#include "libANGLE/renderer/d3d/d3d9/Renderer9.h"

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

#include "common/utilities.h"
#include "libANGLE/angletypes.h"
#include "libANGLE/Buffer.h"
#include "libANGLE/Display.h"
#include "libANGLE/features.h"
#include "libANGLE/formatutils.h"
#include "libANGLE/Framebuffer.h"
#include "libANGLE/FramebufferAttachment.h"
#include "libANGLE/Program.h"
#include "libANGLE/Renderbuffer.h"
#include "libANGLE/renderer/d3d/d3d9/Blit9.h"
#include "libANGLE/renderer/d3d/d3d9/Buffer9.h"
#include "libANGLE/renderer/d3d/d3d9/Fence9.h"
#include "libANGLE/renderer/d3d/d3d9/formatutils9.h"
#include "libANGLE/renderer/d3d/d3d9/Framebuffer9.h"
#include "libANGLE/renderer/d3d/d3d9/Image9.h"
#include "libANGLE/renderer/d3d/d3d9/IndexBuffer9.h"
#include "libANGLE/renderer/d3d/d3d9/Query9.h"
#include "libANGLE/renderer/d3d/d3d9/renderer9_utils.h"
#include "libANGLE/renderer/d3d/d3d9/RenderTarget9.h"
#include "libANGLE/renderer/d3d/d3d9/ShaderExecutable9.h"
#include "libANGLE/renderer/d3d/d3d9/SwapChain9.h"
#include "libANGLE/renderer/d3d/d3d9/TextureStorage9.h"
#include "libANGLE/renderer/d3d/d3d9/VertexArray9.h"
#include "libANGLE/renderer/d3d/d3d9/VertexBuffer9.h"
#include "libANGLE/renderer/d3d/CompilerD3D.h"
#include "libANGLE/renderer/d3d/DeviceD3D.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/State.h"
#include "libANGLE/Surface.h"
#include "libANGLE/Texture.h"
#include "third_party/trace_event/trace_event.h"



#if !defined(ANGLE_COMPILE_OPTIMIZATION_LEVEL)
#define ANGLE_COMPILE_OPTIMIZATION_LEVEL D3DCOMPILE_OPTIMIZATION_LEVEL3
#endif

// Enable ANGLE_SUPPORT_SHADER_MODEL_2 if you wish devices with only shader model 2.
// Such a device would not be conformant.
#ifndef ANGLE_SUPPORT_SHADER_MODEL_2
#define ANGLE_SUPPORT_SHADER_MODEL_2 0
#endif

namespace rx
{

enum
{
    MAX_VERTEX_CONSTANT_VECTORS_D3D9 = 256,
    MAX_PIXEL_CONSTANT_VECTORS_SM2 = 32,
    MAX_PIXEL_CONSTANT_VECTORS_SM3 = 224,
    MAX_VARYING_VECTORS_SM2 = 8,
    MAX_VARYING_VECTORS_SM3 = 10,

    MAX_TEXTURE_IMAGE_UNITS_VTF_SM3 = 4
};

Renderer9::Renderer9(egl::Display *display) : RendererD3D(display), mStateManager(this)
{
    mD3d9Module = NULL;

    mD3d9 = NULL;
    mD3d9Ex = NULL;
    mDevice = NULL;
    mDeviceEx = NULL;
    mDeviceWindow = NULL;
    mBlit = NULL;

    mAdapter = D3DADAPTER_DEFAULT;

    const egl::AttributeMap &attributes = display->getAttributeMap();
    EGLint requestedDeviceType = attributes.get(EGL_PLATFORM_ANGLE_DEVICE_TYPE_ANGLE,
                                                EGL_PLATFORM_ANGLE_DEVICE_TYPE_HARDWARE_ANGLE);
    switch (requestedDeviceType)
    {
      case EGL_PLATFORM_ANGLE_DEVICE_TYPE_HARDWARE_ANGLE:
        mDeviceType = D3DDEVTYPE_HAL;
        break;

      case EGL_PLATFORM_ANGLE_DEVICE_TYPE_REFERENCE_ANGLE:
        mDeviceType = D3DDEVTYPE_REF;
        break;

      case EGL_PLATFORM_ANGLE_DEVICE_TYPE_NULL_ANGLE:
        mDeviceType = D3DDEVTYPE_NULLREF;
        break;

      default:
        UNREACHABLE();
    }

    mMaskedClearSavedState = NULL;

    mVertexDataManager = NULL;
    mIndexDataManager = NULL;
    mLineLoopIB = NULL;
    mCountingIB = NULL;

    mMaxNullColorbufferLRU = 0;
    for (int i = 0; i < NUM_NULL_COLORBUFFER_CACHE_ENTRIES; i++)
    {
        mNullColorbufferCache[i].lruCount = 0;
        mNullColorbufferCache[i].width = 0;
        mNullColorbufferCache[i].height = 0;
        mNullColorbufferCache[i].buffer = NULL;
    }

    mAppliedVertexShader = NULL;
    mAppliedPixelShader = NULL;
    mAppliedProgramSerial = 0;

    initializeDebugAnnotator();

    mEGLDevice = nullptr;
}

Renderer9::~Renderer9()
{
    if (mDevice)
    {
        // If the device is lost, reset it first to prevent leaving the driver in an unstable state
        if (testDeviceLost())
        {
            resetDevice();
        }
    }

    release();
}

void Renderer9::release()
{
    RendererD3D::cleanup();

    mTranslatedAttribCache.clear();

    releaseDeviceResources();

    SafeDelete(mEGLDevice);
    SafeRelease(mDevice);
    SafeRelease(mDeviceEx);
    SafeRelease(mD3d9);
    SafeRelease(mD3d9Ex);

    mCompiler.release();

    if (mDeviceWindow)
    {
        DestroyWindow(mDeviceWindow);
        mDeviceWindow = NULL;
    }

    mD3d9Module = NULL;
}

egl::Error Renderer9::initialize()
{
    TRACE_EVENT0("gpu.angle", "GetModuleHandle_d3d9");
    mD3d9Module = GetModuleHandle(TEXT("d3d9.dll"));

    if (mD3d9Module == NULL)
    {
        return egl::Error(EGL_NOT_INITIALIZED, D3D9_INIT_MISSING_DEP, "No D3D9 module found.");
    }

    typedef HRESULT (WINAPI *Direct3DCreate9ExFunc)(UINT, IDirect3D9Ex**);
    Direct3DCreate9ExFunc Direct3DCreate9ExPtr = reinterpret_cast<Direct3DCreate9ExFunc>(GetProcAddress(mD3d9Module, "Direct3DCreate9Ex"));

    // Use Direct3D9Ex if available. Among other things, this version is less
    // inclined to report a lost context, for example when the user switches
    // desktop. Direct3D9Ex is available in Windows Vista and later if suitable drivers are available.
    if (ANGLE_D3D9EX == ANGLE_ENABLED && Direct3DCreate9ExPtr && SUCCEEDED(Direct3DCreate9ExPtr(D3D_SDK_VERSION, &mD3d9Ex)))
    {
        TRACE_EVENT0("gpu.angle", "D3d9Ex_QueryInterface");
        ASSERT(mD3d9Ex);
        mD3d9Ex->QueryInterface(__uuidof(IDirect3D9), reinterpret_cast<void**>(&mD3d9));
        ASSERT(mD3d9);
    }
    else
    {
        TRACE_EVENT0("gpu.angle", "Direct3DCreate9");
        mD3d9 = Direct3DCreate9(D3D_SDK_VERSION);
    }

    if (!mD3d9)
    {
        return egl::Error(EGL_NOT_INITIALIZED, D3D9_INIT_MISSING_DEP, "Could not create D3D9 device.");
    }

    if (mDisplay->getNativeDisplayId() != nullptr)
    {
    //  UNIMPLEMENTED();   // FIXME: Determine which adapter index the device context corresponds to
    }

    HRESULT result;

    // Give up on getting device caps after about one second.
    {
        TRACE_EVENT0("gpu.angle", "GetDeviceCaps");
        for (int i = 0; i < 10; ++i)
        {
            result = mD3d9->GetDeviceCaps(mAdapter, mDeviceType, &mDeviceCaps);
            if (SUCCEEDED(result))
            {
                break;
            }
            else if (result == D3DERR_NOTAVAILABLE)
            {
                Sleep(100);   // Give the driver some time to initialize/recover
            }
            else if (FAILED(result))   // D3DERR_OUTOFVIDEOMEMORY, E_OUTOFMEMORY, D3DERR_INVALIDDEVICE, or another error we can't recover from
            {
                return egl::Error(EGL_NOT_INITIALIZED,
                                  D3D9_INIT_OTHER_ERROR,
                                  "Failed to get device caps: Error code 0x%x\n", result);
            }
        }
    }

#if ANGLE_SUPPORT_SHADER_MODEL_2
    size_t minShaderModel = 2;
#else
    size_t minShaderModel = 3;
#endif

    if (mDeviceCaps.PixelShaderVersion < D3DPS_VERSION(minShaderModel, 0))
    {
        return egl::Error(EGL_NOT_INITIALIZED,
                          D3D9_INIT_UNSUPPORTED_VERSION,
                          "Renderer does not support PS %u.%u.aborting!", minShaderModel, 0);
    }

    // When DirectX9 is running with an older DirectX8 driver, a StretchRect from a regular texture to a render target texture is not supported.
    // This is required by Texture2D::ensureRenderTarget.
    if ((mDeviceCaps.DevCaps2 & D3DDEVCAPS2_CAN_STRETCHRECT_FROM_TEXTURES) == 0)
    {
        return egl::Error(EGL_NOT_INITIALIZED,
                          D3D9_INIT_UNSUPPORTED_STRETCHRECT,
                          "Renderer does not support StretctRect from textures.");
    }

    {
        TRACE_EVENT0("gpu.angle", "GetAdapterIdentifier");
        mD3d9->GetAdapterIdentifier(mAdapter, 0, &mAdapterIdentifier);
    }

    static const TCHAR windowName[] = TEXT("AngleHiddenWindow");
    static const TCHAR className[] = TEXT("STATIC");

    {
        TRACE_EVENT0("gpu.angle", "CreateWindowEx");
        mDeviceWindow = CreateWindowEx(WS_EX_NOACTIVATE, className, windowName, WS_DISABLED | WS_POPUP, 0, 0, 1, 1, HWND_MESSAGE, NULL, GetModuleHandle(NULL), NULL);
    }

    D3DPRESENT_PARAMETERS presentParameters = getDefaultPresentParameters();
    DWORD behaviorFlags = D3DCREATE_FPU_PRESERVE | D3DCREATE_NOWINDOWCHANGES | D3DCREATE_MULTITHREADED;

    {
        TRACE_EVENT0("gpu.angle", "D3d9_CreateDevice");
        result = mD3d9->CreateDevice(mAdapter, mDeviceType, mDeviceWindow, behaviorFlags | D3DCREATE_HARDWARE_VERTEXPROCESSING | D3DCREATE_PUREDEVICE, &presentParameters, &mDevice);
    }
    if (result == D3DERR_OUTOFVIDEOMEMORY || result == E_OUTOFMEMORY || result == D3DERR_DEVICELOST)
    {
        return egl::Error(EGL_BAD_ALLOC, D3D9_INIT_OUT_OF_MEMORY,
                          "CreateDevice failed: device lost of out of memory");
    }

    if (FAILED(result))
    {
        TRACE_EVENT0("gpu.angle", "D3d9_CreateDevice2");
        result = mD3d9->CreateDevice(mAdapter, mDeviceType, mDeviceWindow, behaviorFlags | D3DCREATE_SOFTWARE_VERTEXPROCESSING, &presentParameters, &mDevice);

        if (FAILED(result))
        {
            ASSERT(result == D3DERR_OUTOFVIDEOMEMORY || result == E_OUTOFMEMORY || result == D3DERR_NOTAVAILABLE || result == D3DERR_DEVICELOST);
            return egl::Error(EGL_BAD_ALLOC, D3D9_INIT_OUT_OF_MEMORY,
                              "CreateDevice2 failed: device lost, not available, or of out of memory");
        }
    }

    if (mD3d9Ex)
    {
        TRACE_EVENT0("gpu.angle", "mDevice_QueryInterface");
        result = mDevice->QueryInterface(__uuidof(IDirect3DDevice9Ex), (void**)&mDeviceEx);
        ASSERT(SUCCEEDED(result));
    }

    {
        TRACE_EVENT0("gpu.angle", "ShaderCache initialize");
        mVertexShaderCache.initialize(mDevice);
        mPixelShaderCache.initialize(mDevice);
    }

    D3DDISPLAYMODE currentDisplayMode;
    mD3d9->GetAdapterDisplayMode(mAdapter, &currentDisplayMode);

    // Check vertex texture support
    // Only Direct3D 10 ready devices support all the necessary vertex texture formats.
    // We test this using D3D9 by checking support for the R16F format.
    mVertexTextureSupport = mDeviceCaps.PixelShaderVersion >= D3DPS_VERSION(3, 0) &&
                            SUCCEEDED(mD3d9->CheckDeviceFormat(mAdapter, mDeviceType, currentDisplayMode.Format,
                                                               D3DUSAGE_QUERY_VERTEXTEXTURE, D3DRTYPE_TEXTURE, D3DFMT_R16F));

    initializeDevice();

    return egl::Error(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 Renderer9::initializeDevice()
{
    // Permanent non-default states
    mDevice->SetRenderState(D3DRS_POINTSPRITEENABLE, TRUE);
    mDevice->SetRenderState(D3DRS_LASTPIXEL, FALSE);

    if (mDeviceCaps.PixelShaderVersion >= D3DPS_VERSION(3, 0))
    {
        mDevice->SetRenderState(D3DRS_POINTSIZE_MAX, (DWORD&)mDeviceCaps.MaxPointSize);
    }
    else
    {
        mDevice->SetRenderState(D3DRS_POINTSIZE_MAX, 0x3F800000);   // 1.0f
    }

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

    mCurVertexSamplerStates.resize(rendererCaps.maxVertexTextureImageUnits);
    mCurPixelSamplerStates.resize(rendererCaps.maxTextureImageUnits);

    mCurVertexTextures.resize(rendererCaps.maxVertexTextureImageUnits);
    mCurPixelTextures.resize(rendererCaps.maxTextureImageUnits);

    markAllStateDirty();

    mSceneStarted = false;

    ASSERT(!mBlit);
    mBlit = new Blit9(this);
    mBlit->initialize();

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

    mTranslatedAttribCache.resize(getRendererCaps().maxVertexAttributes);
}

D3DPRESENT_PARAMETERS Renderer9::getDefaultPresentParameters()
{
    D3DPRESENT_PARAMETERS presentParameters = {0};

    // The default swap chain is never actually used. Surface will create a new swap chain with the proper parameters.
    presentParameters.AutoDepthStencilFormat = D3DFMT_UNKNOWN;
    presentParameters.BackBufferCount = 1;
    presentParameters.BackBufferFormat = D3DFMT_UNKNOWN;
    presentParameters.BackBufferWidth = 1;
    presentParameters.BackBufferHeight = 1;
    presentParameters.EnableAutoDepthStencil = FALSE;
    presentParameters.Flags = 0;
    presentParameters.hDeviceWindow = mDeviceWindow;
    presentParameters.MultiSampleQuality = 0;
    presentParameters.MultiSampleType = D3DMULTISAMPLE_NONE;
    presentParameters.PresentationInterval = D3DPRESENT_INTERVAL_DEFAULT;
    presentParameters.SwapEffect = D3DSWAPEFFECT_DISCARD;
    presentParameters.Windowed = TRUE;

    return presentParameters;
}

egl::ConfigSet Renderer9::generateConfigs() const
{
    static const GLenum colorBufferFormats[] =
    {
        GL_BGR5_A1_ANGLEX,
        GL_BGRA8_EXT,
        GL_RGB565,

    };

    static const GLenum depthStencilBufferFormats[] =
    {
        GL_NONE,
        GL_DEPTH_COMPONENT32_OES,
        GL_DEPTH24_STENCIL8_OES,
        GL_DEPTH_COMPONENT24_OES,
        GL_DEPTH_COMPONENT16,
    };

    const gl::Caps &rendererCaps = getRendererCaps();
    const gl::TextureCapsMap &rendererTextureCaps = getRendererTextureCaps();

    D3DDISPLAYMODE currentDisplayMode;
    mD3d9->GetAdapterDisplayMode(mAdapter, &currentDisplayMode);

    // Determine the min and max swap intervals
    int minSwapInterval = 4;
    int maxSwapInterval = 0;

    if (mDeviceCaps.PresentationIntervals & D3DPRESENT_INTERVAL_IMMEDIATE)
    {
        minSwapInterval = std::min(minSwapInterval, 0);
        maxSwapInterval = std::max(maxSwapInterval, 0);
    }
    if (mDeviceCaps.PresentationIntervals & D3DPRESENT_INTERVAL_ONE)
    {
        minSwapInterval = std::min(minSwapInterval, 1);
        maxSwapInterval = std::max(maxSwapInterval, 1);
    }
    if (mDeviceCaps.PresentationIntervals & D3DPRESENT_INTERVAL_TWO)
    {
        minSwapInterval = std::min(minSwapInterval, 2);
        maxSwapInterval = std::max(maxSwapInterval, 2);
    }
    if (mDeviceCaps.PresentationIntervals & D3DPRESENT_INTERVAL_THREE)
    {
        minSwapInterval = std::min(minSwapInterval, 3);
        maxSwapInterval = std::max(maxSwapInterval, 3);
    }
    if (mDeviceCaps.PresentationIntervals & D3DPRESENT_INTERVAL_FOUR)
    {
        minSwapInterval = std::min(minSwapInterval, 4);
        maxSwapInterval = std::max(maxSwapInterval, 4);
    }

    egl::ConfigSet configs;
    for (size_t formatIndex = 0; formatIndex < ArraySize(colorBufferFormats); formatIndex++)
    {
        GLenum colorBufferInternalFormat = colorBufferFormats[formatIndex];
        const gl::TextureCaps &colorBufferFormatCaps = rendererTextureCaps.get(colorBufferInternalFormat);
        if (colorBufferFormatCaps.renderable)
        {
            for (size_t depthStencilIndex = 0; depthStencilIndex < ArraySize(depthStencilBufferFormats); depthStencilIndex++)
            {
                GLenum depthStencilBufferInternalFormat = depthStencilBufferFormats[depthStencilIndex];
                const gl::TextureCaps &depthStencilBufferFormatCaps = rendererTextureCaps.get(depthStencilBufferInternalFormat);
                if (depthStencilBufferFormatCaps.renderable || depthStencilBufferInternalFormat == GL_NONE)
                {
                    const gl::InternalFormat &colorBufferFormatInfo = gl::GetInternalFormatInfo(colorBufferInternalFormat);
                    const gl::InternalFormat &depthStencilBufferFormatInfo = gl::GetInternalFormatInfo(depthStencilBufferInternalFormat);
                    const d3d9::TextureFormat &d3d9ColorBufferFormatInfo = d3d9::GetTextureFormatInfo(colorBufferInternalFormat);

                    egl::Config config;
                    config.renderTargetFormat = colorBufferInternalFormat;
                    config.depthStencilFormat = depthStencilBufferInternalFormat;
                    config.bufferSize = colorBufferFormatInfo.pixelBytes * 8;
                    config.redSize = colorBufferFormatInfo.redBits;
                    config.greenSize = colorBufferFormatInfo.greenBits;
                    config.blueSize = colorBufferFormatInfo.blueBits;
                    config.luminanceSize = colorBufferFormatInfo.luminanceBits;
                    config.alphaSize = colorBufferFormatInfo.alphaBits;
                    config.alphaMaskSize = 0;
                    config.bindToTextureRGB = (colorBufferFormatInfo.format == GL_RGB);
                    config.bindToTextureRGBA = (colorBufferFormatInfo.format == GL_RGBA || colorBufferFormatInfo.format == GL_BGRA_EXT);
                    config.colorBufferType = EGL_RGB_BUFFER;
                    // Mark as slow if blits to the back-buffer won't be straight forward
                    config.configCaveat = (currentDisplayMode.Format == d3d9ColorBufferFormatInfo.renderFormat) ? EGL_NONE : EGL_SLOW_CONFIG;
                    config.configID = static_cast<EGLint>(configs.size() + 1);
                    config.conformant = EGL_OPENGL_ES2_BIT;
                    config.depthSize = depthStencilBufferFormatInfo.depthBits;
                    config.level = 0;
                    config.matchNativePixmap = EGL_NONE;
                    config.maxPBufferWidth = rendererCaps.max2DTextureSize;
                    config.maxPBufferHeight = rendererCaps.max2DTextureSize;
                    config.maxPBufferPixels = rendererCaps.max2DTextureSize * rendererCaps.max2DTextureSize;
                    config.maxSwapInterval = maxSwapInterval;
                    config.minSwapInterval = minSwapInterval;
                    config.nativeRenderable = EGL_FALSE;
                    config.nativeVisualID = 0;
                    config.nativeVisualType = EGL_NONE;
                    config.renderableType = EGL_OPENGL_ES2_BIT;
                    config.sampleBuffers = 0; // FIXME: enumerate multi-sampling
                    config.samples = 0;
                    config.stencilSize = depthStencilBufferFormatInfo.stencilBits;
                    config.surfaceType = EGL_PBUFFER_BIT | EGL_WINDOW_BIT | EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
                    config.transparentType = EGL_NONE;
                    config.transparentRedValue = 0;
                    config.transparentGreenValue = 0;
                    config.transparentBlueValue = 0;

                    configs.add(config);
                }
            }
        }
    }

    ASSERT(configs.size() > 0);
    return configs;
}

void Renderer9::generateDisplayExtensions(egl::DisplayExtensions *outExtensions) const
{
    outExtensions->createContextRobustness = true;

    if (getShareHandleSupport())
    {
        outExtensions->d3dShareHandleClientBuffer     = true;
        outExtensions->surfaceD3DTexture2DShareHandle = true;
    }

    outExtensions->querySurfacePointer = true;
    outExtensions->windowFixedSize     = true;
    outExtensions->postSubBuffer       = true;
    outExtensions->createContext       = true;
    outExtensions->deviceQuery         = true;
    outExtensions->createContextNoError = true;

    outExtensions->image               = true;
    outExtensions->imageBase           = true;
    outExtensions->glTexture2DImage    = true;
    outExtensions->glRenderbufferImage = true;

    outExtensions->flexibleSurfaceCompatibility = true;
}

void Renderer9::startScene()
{
    if (!mSceneStarted)
    {
        long result = mDevice->BeginScene();
        if (SUCCEEDED(result)) {
            // This is defensive checking against the device being
            // lost at unexpected times.
            mSceneStarted = true;
        }
    }
}

void Renderer9::endScene()
{
    if (mSceneStarted)
    {
        // EndScene can fail if the device was lost, for example due
        // to a TDR during a draw call.
        mDevice->EndScene();
        mSceneStarted = false;
    }
}

gl::Error Renderer9::flush()
{
    IDirect3DQuery9* query = NULL;
    gl::Error error = allocateEventQuery(&query);
    if (error.isError())
    {
        return error;
    }

    HRESULT result = query->Issue(D3DISSUE_END);
    if (FAILED(result))
    {
        ASSERT(result == D3DERR_OUTOFVIDEOMEMORY || result == E_OUTOFMEMORY);
        return gl::Error(GL_OUT_OF_MEMORY, "Failed to issue event query, result: 0x%X.", result);
    }

    // Grab the query data once
    result = query->GetData(NULL, 0, D3DGETDATA_FLUSH);
    freeEventQuery(query);
    if (FAILED(result))
    {
        if (d3d9::isDeviceLostError(result))
        {
            notifyDeviceLost();
        }

        return gl::Error(GL_OUT_OF_MEMORY, "Failed to get event query data, result: 0x%X.", result);
    }

    return gl::Error(GL_NO_ERROR);
}

gl::Error Renderer9::finish()
{
    IDirect3DQuery9* query = NULL;
    gl::Error error = allocateEventQuery(&query);
    if (error.isError())
    {
        return error;
    }

    HRESULT result = query->Issue(D3DISSUE_END);
    if (FAILED(result))
    {
        ASSERT(result == D3DERR_OUTOFVIDEOMEMORY || result == E_OUTOFMEMORY);
        return gl::Error(GL_OUT_OF_MEMORY, "Failed to issue event query, result: 0x%X.", result);
    }

    // Grab the query data once
    result = query->GetData(NULL, 0, D3DGETDATA_FLUSH);
    if (FAILED(result))
    {
        if (d3d9::isDeviceLostError(result))
        {
            notifyDeviceLost();
        }

        freeEventQuery(query);
        return gl::Error(GL_OUT_OF_MEMORY, "Failed to get event query data, result: 0x%X.", result);
    }

    // Loop until the query completes
    while (result == S_FALSE)
    {
        // Keep polling, but allow other threads to do something useful first
        ScheduleYield();

        result = query->GetData(NULL, 0, D3DGETDATA_FLUSH);

        // explicitly check for device loss
        // some drivers seem to return S_FALSE even if the device is lost
        // instead of D3DERR_DEVICELOST like they should
        if (result == S_FALSE && testDeviceLost())
        {
            result = D3DERR_DEVICELOST;
        }

        if (FAILED(result))
        {
            if (d3d9::isDeviceLostError(result))
            {
                notifyDeviceLost();
            }

            freeEventQuery(query);
            return gl::Error(GL_OUT_OF_MEMORY, "Failed to get event query data, result: 0x%X.", result);
        }

    }

    freeEventQuery(query);

    return gl::Error(GL_NO_ERROR);
}

SwapChainD3D *Renderer9::createSwapChain(NativeWindow nativeWindow,
                                         HANDLE shareHandle,
                                         GLenum backBufferFormat,
                                         GLenum depthBufferFormat,
                                         EGLint orientation)
{
    return new SwapChain9(this, nativeWindow, shareHandle, backBufferFormat, depthBufferFormat,
                          orientation);
}

CompilerImpl *Renderer9::createCompiler()
{
    return new CompilerD3D(SH_HLSL_3_0_OUTPUT);
}

void *Renderer9::getD3DDevice()
{
    return reinterpret_cast<void*>(mDevice);
}

gl::Error Renderer9::allocateEventQuery(IDirect3DQuery9 **outQuery)
{
    if (mEventQueryPool.empty())
    {
        HRESULT result = mDevice->CreateQuery(D3DQUERYTYPE_EVENT, outQuery);
        if (FAILED(result))
        {
            ASSERT(result == D3DERR_OUTOFVIDEOMEMORY || result == E_OUTOFMEMORY);
            return gl::Error(GL_OUT_OF_MEMORY, "Failed to allocate event query, result: 0x%X.", result);
        }
    }
    else
    {
        *outQuery = mEventQueryPool.back();
        mEventQueryPool.pop_back();
    }

    return gl::Error(GL_NO_ERROR);
}

void Renderer9::freeEventQuery(IDirect3DQuery9* query)
{
    if (mEventQueryPool.size() > 1000)
    {
        SafeRelease(query);
    }
    else
    {
        mEventQueryPool.push_back(query);
    }
}

gl::Error Renderer9::createVertexShader(const DWORD *function, size_t length, IDirect3DVertexShader9 **outShader)
{
    return mVertexShaderCache.create(function, length, outShader);
}

gl::Error Renderer9::createPixelShader(const DWORD *function, size_t length, IDirect3DPixelShader9 **outShader)
{
    return mPixelShaderCache.create(function, length, outShader);
}

HRESULT Renderer9::createVertexBuffer(UINT Length, DWORD Usage, IDirect3DVertexBuffer9 **ppVertexBuffer)
{
    D3DPOOL Pool = getBufferPool(Usage);
    return mDevice->CreateVertexBuffer(Length, Usage, 0, Pool, ppVertexBuffer, NULL);
}

VertexBuffer *Renderer9::createVertexBuffer()
{
    return new VertexBuffer9(this);
}

HRESULT Renderer9::createIndexBuffer(UINT Length, DWORD Usage, D3DFORMAT Format, IDirect3DIndexBuffer9 **ppIndexBuffer)
{
    D3DPOOL Pool = getBufferPool(Usage);
    return mDevice->CreateIndexBuffer(Length, Usage, Format, Pool, ppIndexBuffer, NULL);
}

IndexBuffer *Renderer9::createIndexBuffer()
{
    return new IndexBuffer9(this);
}

BufferImpl *Renderer9::createBuffer()
{
    return new Buffer9(this);
}

VertexArrayImpl *Renderer9::createVertexArray(const gl::VertexArray::Data &data)
{
    return new VertexArray9(data);
}

QueryImpl *Renderer9::createQuery(GLenum type)
{
    return new Query9(this, type);
}

FenceNVImpl *Renderer9::createFenceNV()
{
    return new FenceNV9(this);
}

FenceSyncImpl *Renderer9::createFenceSync()
{
    // Renderer9 doesn't support ES 3.0 and its sync objects.
    UNREACHABLE();
    return NULL;
}

TransformFeedbackImpl* Renderer9::createTransformFeedback()
{
    return new TransformFeedbackD3D();
}

StreamImpl *Renderer9::createStream(const egl::AttributeMap &attribs)
{
    // Streams are not supported under D3D9
    UNREACHABLE();
    return nullptr;
}

bool Renderer9::supportsFastCopyBufferToTexture(GLenum internalFormat) const
{
    // Pixel buffer objects are not supported in D3D9, since D3D9 is ES2-only and PBOs are ES3.
    return false;
}

gl::Error Renderer9::fastCopyBufferToTexture(const gl::PixelUnpackState &unpack, unsigned int offset, RenderTargetD3D *destRenderTarget,
                                             GLenum destinationFormat, GLenum sourcePixelsType, const gl::Box &destArea)
{
    // Pixel buffer objects are not supported in D3D9, since D3D9 is ES2-only and PBOs are ES3.
    UNREACHABLE();
    return gl::Error(GL_INVALID_OPERATION);
}

gl::Error Renderer9::generateSwizzle(gl::Texture *texture)
{
    // Swizzled textures are not available in ES2 or D3D9
    UNREACHABLE();
    return gl::Error(GL_INVALID_OPERATION);
}

gl::Error Renderer9::setSamplerState(gl::SamplerType type, int index, gl::Texture *texture, const gl::SamplerState &samplerState)
{
    CurSamplerState &appliedSampler = (type == gl::SAMPLER_PIXEL) ? mCurPixelSamplerStates[index]
                                                                  : mCurVertexSamplerStates[index];

    // Make sure to add the level offset for our tiny compressed texture workaround
    TextureD3D *textureD3D = GetImplAs<TextureD3D>(texture);

    TextureStorage *storage = nullptr;
    gl::Error error = textureD3D->getNativeTexture(&storage);
    if (error.isError())
    {
        return error;
    }

    // Storage should exist, texture should be complete
    ASSERT(storage);

    DWORD baseLevel = texture->getBaseLevel() + storage->getTopLevel();

    if (appliedSampler.forceSet || appliedSampler.baseLevel != baseLevel ||
        memcmp(&samplerState, &appliedSampler, sizeof(gl::SamplerState)) != 0)
    {
        int d3dSamplerOffset = (type == gl::SAMPLER_PIXEL) ? 0 : D3DVERTEXTEXTURESAMPLER0;
        int d3dSampler = index + d3dSamplerOffset;

        mDevice->SetSamplerState(d3dSampler, D3DSAMP_ADDRESSU, gl_d3d9::ConvertTextureWrap(samplerState.wrapS));
        mDevice->SetSamplerState(d3dSampler, D3DSAMP_ADDRESSV, gl_d3d9::ConvertTextureWrap(samplerState.wrapT));

        mDevice->SetSamplerState(d3dSampler, D3DSAMP_MAGFILTER, gl_d3d9::ConvertMagFilter(samplerState.magFilter, samplerState.maxAnisotropy));

        D3DTEXTUREFILTERTYPE d3dMinFilter, d3dMipFilter;
        float lodBias;
        gl_d3d9::ConvertMinFilter(samplerState.minFilter, &d3dMinFilter, &d3dMipFilter, &lodBias,
                                  samplerState.maxAnisotropy, baseLevel);
        mDevice->SetSamplerState(d3dSampler, D3DSAMP_MINFILTER, d3dMinFilter);
        mDevice->SetSamplerState(d3dSampler, D3DSAMP_MIPFILTER, d3dMipFilter);
        mDevice->SetSamplerState(d3dSampler, D3DSAMP_MAXMIPLEVEL, baseLevel);
        mDevice->SetSamplerState(d3dSampler, D3DSAMP_MIPMAPLODBIAS, static_cast<DWORD>(lodBias));
        if (getRendererExtensions().textureFilterAnisotropic)
        {
            mDevice->SetSamplerState(d3dSampler, D3DSAMP_MAXANISOTROPY, (DWORD)samplerState.maxAnisotropy);
        }
    }

    appliedSampler.forceSet = false;
    appliedSampler.samplerState = samplerState;
    appliedSampler.baseLevel = baseLevel;

    return gl::Error(GL_NO_ERROR);
}

gl::Error Renderer9::setTexture(gl::SamplerType type, int index, gl::Texture *texture)
{
    int d3dSamplerOffset = (type == gl::SAMPLER_PIXEL) ? 0 : D3DVERTEXTEXTURESAMPLER0;
    int d3dSampler = index + d3dSamplerOffset;
    IDirect3DBaseTexture9 *d3dTexture = NULL;
    bool forceSetTexture = false;

    std::vector<uintptr_t> &appliedTextures = (type == gl::SAMPLER_PIXEL) ? mCurPixelTextures : mCurVertexTextures;

    if (texture)
    {
        TextureD3D *textureImpl = GetImplAs<TextureD3D>(texture);

        TextureStorage *texStorage = nullptr;
        gl::Error error = textureImpl->getNativeTexture(&texStorage);
        if (error.isError())
        {
            return error;
        }

        // Texture should be complete and have a storage
        ASSERT(texStorage);

        TextureStorage9 *storage9 = GetAs<TextureStorage9>(texStorage);
        error = storage9->getBaseTexture(&d3dTexture);
        if (error.isError())
        {
            return error;
        }

        // If we get NULL back from getBaseTexture here, something went wrong
        // in the texture class and we're unexpectedly missing the d3d texture
        ASSERT(d3dTexture != NULL);

        forceSetTexture = textureImpl->hasDirtyImages();
        textureImpl->resetDirty();
    }

    if (forceSetTexture || appliedTextures[index] != reinterpret_cast<uintptr_t>(d3dTexture))
    {
        mDevice->SetTexture(d3dSampler, d3dTexture);
    }

    appliedTextures[index] = reinterpret_cast<uintptr_t>(d3dTexture);

    return gl::Error(GL_NO_ERROR);
}

gl::Error Renderer9::setUniformBuffers(const gl::Data &/*data*/,
                                       const std::vector<GLint> &/*vertexUniformBuffers*/,
                                       const std::vector<GLint> &/*fragmentUniformBuffers*/)
{
    // No effect in ES2/D3D9
    return gl::Error(GL_NO_ERROR);
}

void Renderer9::syncState(const gl::State &state, const gl::State::DirtyBits &bitmask)
{
    mStateManager.syncState(state, bitmask);
}

gl::Error Renderer9::updateState(const gl::Data &data, GLenum drawMode)
{
    // Applies the render target surface, depth stencil surface, viewport rectangle and
    // scissor rectangle to the renderer
    const gl::Framebuffer *framebufferObject = data.state->getDrawFramebuffer();
    ASSERT(framebufferObject && framebufferObject->checkStatus(data) == GL_FRAMEBUFFER_COMPLETE);

    gl::Error error = applyRenderTarget(framebufferObject);
    if (error.isError())
    {
        return error;
    }

    // Setting viewport state
    setViewport(data.caps, data.state->getViewport(), data.state->getNearPlane(),
                data.state->getFarPlane(), drawMode, data.state->getRasterizerState().frontFace,
                false);

    // Setting scissors state
    setScissorRectangle(data.state->getScissor(), data.state->isScissorTestEnabled());

    // Setting blend, depth stencil, and rasterizer states
    int samples                    = framebufferObject->getSamples(data);
    gl::RasterizerState rasterizer = data.state->getRasterizerState();
    rasterizer.pointDrawMode       = (drawMode == GL_POINTS);
    rasterizer.multiSample         = (samples != 0);

    unsigned int mask = GetBlendSampleMask(data, samples);
    error             = setBlendDepthRasterStates(data, mask);

    if (error.isError())
    {
        return error;
    }

    mStateManager.resetDirtyBits();

    return error;
}

void Renderer9::setScissorRectangle(const gl::Rectangle &scissor, bool enabled)
{
    mStateManager.setScissorState(scissor, enabled);
}

gl::Error Renderer9::setBlendDepthRasterStates(const gl::Data &glData, GLenum drawMode)
{
    int samples                    = glData.state->getDrawFramebuffer()->getSamples(glData);
    gl::RasterizerState rasterizer = glData.state->getRasterizerState();
    rasterizer.pointDrawMode       = (drawMode == GL_POINTS);
    rasterizer.multiSample         = (samples != 0);

    unsigned int mask = GetBlendSampleMask(glData, samples);
    return mStateManager.setBlendDepthRasterStates(*glData.state, mask);
}

void Renderer9::setViewport(const gl::Caps *caps,
                            const gl::Rectangle &viewport,
                            float zNear,
                            float zFar,
                            GLenum drawMode,
                            GLenum frontFace,
                            bool ignoreViewport)
{
    mStateManager.setViewportState(caps, viewport, zNear, zFar, drawMode, frontFace,
                                   ignoreViewport);
}

bool Renderer9::applyPrimitiveType(GLenum mode, GLsizei count, bool usesPointSize)
{
    switch (mode)
    {
      case GL_POINTS:
        mPrimitiveType = D3DPT_POINTLIST;
        mPrimitiveCount = count;
        break;
      case GL_LINES:
        mPrimitiveType = D3DPT_LINELIST;
        mPrimitiveCount = count / 2;
        break;
      case GL_LINE_LOOP:
        mPrimitiveType = D3DPT_LINESTRIP;
        mPrimitiveCount = count - 1;   // D3D doesn't support line loops, so we draw the last line separately
        break;
      case GL_LINE_STRIP:
        mPrimitiveType = D3DPT_LINESTRIP;
        mPrimitiveCount = count - 1;
        break;
      case GL_TRIANGLES:
        mPrimitiveType = D3DPT_TRIANGLELIST;
        mPrimitiveCount = count / 3;
        break;
      case GL_TRIANGLE_STRIP:
        mPrimitiveType = D3DPT_TRIANGLESTRIP;
        mPrimitiveCount = count - 2;
        break;
      case GL_TRIANGLE_FAN:
        mPrimitiveType = D3DPT_TRIANGLEFAN;
        mPrimitiveCount = count - 2;
        break;
      default:
        UNREACHABLE();
        return false;
    }

    return mPrimitiveCount > 0;
}


gl::Error Renderer9::getNullColorbuffer(const gl::FramebufferAttachment *depthbuffer, const gl::FramebufferAttachment **outColorBuffer)
{
    ASSERT(depthbuffer);

    const gl::Extents &size = depthbuffer->getSize();

    // search cached nullcolorbuffers
    for (int i = 0; i < NUM_NULL_COLORBUFFER_CACHE_ENTRIES; i++)
    {
        if (mNullColorbufferCache[i].buffer != NULL &&
            mNullColorbufferCache[i].width == size.width &&
            mNullColorbufferCache[i].height == size.height)
        {
            mNullColorbufferCache[i].lruCount = ++mMaxNullColorbufferLRU;
            *outColorBuffer = mNullColorbufferCache[i].buffer;
            return gl::Error(GL_NO_ERROR);
        }
    }

    gl::Renderbuffer *nullRenderbuffer = new gl::Renderbuffer(createRenderbuffer(), 0);
    gl::Error error = nullRenderbuffer->setStorage(GL_NONE, size.width, size.height);
    if (error.isError())
    {
        SafeDelete(nullRenderbuffer);
        return error;
    }

    gl::FramebufferAttachment *nullbuffer = new gl::FramebufferAttachment(GL_RENDERBUFFER, GL_NONE, gl::ImageIndex::MakeInvalid(), nullRenderbuffer);

    // add nullbuffer to the cache
    NullColorbufferCacheEntry *oldest = &mNullColorbufferCache[0];
    for (int i = 1; i < NUM_NULL_COLORBUFFER_CACHE_ENTRIES; i++)
    {
        if (mNullColorbufferCache[i].lruCount < oldest->lruCount)
        {
            oldest = &mNullColorbufferCache[i];
        }
    }

    delete oldest->buffer;
    oldest->buffer = nullbuffer;
    oldest->lruCount = ++mMaxNullColorbufferLRU;
    oldest->width    = size.width;
    oldest->height   = size.height;

    *outColorBuffer = nullbuffer;
    return gl::Error(GL_NO_ERROR);
}

gl::Error Renderer9::applyRenderTarget(const gl::FramebufferAttachment *colorAttachment,
                                       const gl::FramebufferAttachment *depthStencilAttachment)
{
    const gl::FramebufferAttachment *renderAttachment = colorAttachment;
    gl::Error error(GL_NO_ERROR);

    // if there is no color attachment we must synthesize a NULL colorattachment
    // to keep the D3D runtime happy.  This should only be possible if depth texturing.
    if (renderAttachment == nullptr)
    {
        error = getNullColorbuffer(depthStencilAttachment, &renderAttachment);
        if (error.isError())
        {
            return error;
        }
    }
    ASSERT(renderAttachment != nullptr);

    size_t renderTargetWidth = 0;
    size_t renderTargetHeight = 0;
    D3DFORMAT renderTargetFormat = D3DFMT_UNKNOWN;

    RenderTarget9 *renderTarget = nullptr;
    error = renderAttachment->getRenderTarget(&renderTarget);
    if (error.isError())
    {
        return error;
    }
    ASSERT(renderTarget);

    bool renderTargetChanged = false;
    unsigned int renderTargetSerial = renderTarget->getSerial();
    if (renderTargetSerial != mAppliedRenderTargetSerial)
    {
        // Apply the render target on the device
        IDirect3DSurface9 *renderTargetSurface = renderTarget->getSurface();
        ASSERT(renderTargetSurface);

        mDevice->SetRenderTarget(0, renderTargetSurface);
        SafeRelease(renderTargetSurface);

        renderTargetWidth = renderTarget->getWidth();
        renderTargetHeight = renderTarget->getHeight();
        renderTargetFormat = renderTarget->getD3DFormat();

        mAppliedRenderTargetSerial = renderTargetSerial;
        renderTargetChanged = true;
    }

    RenderTarget9 *depthStencilRenderTarget = nullptr;
    unsigned int depthStencilSerial = 0;

    if (depthStencilAttachment != nullptr)
    {
        error = depthStencilAttachment->getRenderTarget(&depthStencilRenderTarget);
        if (error.isError())
        {
            return error;
        }
        ASSERT(depthStencilRenderTarget);

        depthStencilSerial = depthStencilRenderTarget->getSerial();
    }

    if (depthStencilSerial != mAppliedDepthStencilSerial || !mDepthStencilInitialized)
    {
        unsigned int depthSize = 0;
        unsigned int stencilSize = 0;

        // Apply the depth stencil on the device
        if (depthStencilRenderTarget)
        {
            IDirect3DSurface9 *depthStencilSurface = depthStencilRenderTarget->getSurface();
            ASSERT(depthStencilSurface);

            mDevice->SetDepthStencilSurface(depthStencilSurface);
            SafeRelease(depthStencilSurface);

            depthSize = depthStencilAttachment->getDepthSize();
            stencilSize = depthStencilAttachment->getStencilSize();
        }
        else
        {
            mDevice->SetDepthStencilSurface(NULL);
        }

        mStateManager.updateDepthSizeIfChanged(mDepthStencilInitialized, depthSize);
        mStateManager.updateStencilSizeIfChanged(mDepthStencilInitialized, stencilSize);

        mAppliedDepthStencilSerial = depthStencilSerial;
        mDepthStencilInitialized = true;
    }

    if (renderTargetChanged || !mRenderTargetDescInitialized)
    {
        mStateManager.forceSetBlendState();
        mStateManager.forceSetScissorState();
        mStateManager.setRenderTargetBounds(renderTargetWidth, renderTargetHeight);
        mRenderTargetDescInitialized = true;
    }

    return gl::Error(GL_NO_ERROR);
}

gl::Error Renderer9::applyRenderTarget(const gl::Framebuffer *framebuffer)
{
    return applyRenderTarget(framebuffer->getColorbuffer(0), framebuffer->getDepthOrStencilbuffer());
}

gl::Error Renderer9::applyVertexBuffer(const gl::State &state,
                                       GLenum mode,
                                       GLint first,
                                       GLsizei count,
                                       GLsizei instances,
                                       TranslatedIndexData * /*indexInfo*/)
{
    gl::Error error = mVertexDataManager->prepareVertexData(state, first, count, &mTranslatedAttribCache, instances);
    if (error.isError())
    {
        return error;
    }

    return mVertexDeclarationCache.applyDeclaration(
        mDevice, mTranslatedAttribCache, state.getProgram(), first, instances, &mRepeatDraw);
}

// Applies the indices and element array bindings to the Direct3D 9 device
gl::Error Renderer9::applyIndexBuffer(const gl::Data &data,
                                      const GLvoid *indices,
                                      GLsizei count,
                                      GLenum mode,
                                      GLenum type,
                                      TranslatedIndexData *indexInfo)
{
    gl::VertexArray *vao           = data.state->getVertexArray();
    gl::Buffer *elementArrayBuffer = vao->getElementArrayBuffer().get();
    gl::Error error = mIndexDataManager->prepareIndexData(type, count, elementArrayBuffer, indices,
                                                          indexInfo, false);
    if (error.isError())
    {
        return error;
    }

    // Directly binding the storage buffer is not supported for d3d9
    ASSERT(indexInfo->storage == NULL);

    if (indexInfo->serial != mAppliedIBSerial)
    {
        IndexBuffer9* indexBuffer = GetAs<IndexBuffer9>(indexInfo->indexBuffer);

        mDevice->SetIndices(indexBuffer->getBuffer());
        mAppliedIBSerial = indexInfo->serial;
    }

    return gl::Error(GL_NO_ERROR);
}

gl::Error Renderer9::applyTransformFeedbackBuffers(const gl::State &state)
{
    ASSERT(!state.isTransformFeedbackActiveUnpaused());
    return gl::Error(GL_NO_ERROR);
}

gl::Error Renderer9::drawArraysImpl(const gl::Data &data,
                                    GLenum mode,
                                    GLint startVertex,
                                    GLsizei count,
                                    GLsizei instances)
{
    ASSERT(!data.state->isTransformFeedbackActiveUnpaused());

    startScene();

    if (mode == GL_LINE_LOOP)
    {
        return drawLineLoop(count, GL_NONE, NULL, 0, NULL);
    }
    else if (instances > 0)
    {
        StaticIndexBufferInterface *countingIB = NULL;
        gl::Error error = getCountingIB(count, &countingIB);
        if (error.isError())
        {
            return error;
        }

        if (mAppliedIBSerial != countingIB->getSerial())
        {
            IndexBuffer9 *indexBuffer = GetAs<IndexBuffer9>(countingIB->getIndexBuffer());

            mDevice->SetIndices(indexBuffer->getBuffer());
            mAppliedIBSerial = countingIB->getSerial();
        }

        for (int i = 0; i < mRepeatDraw; i++)
        {
            mDevice->DrawIndexedPrimitive(mPrimitiveType, 0, 0, count, 0, mPrimitiveCount);
        }

        return gl::Error(GL_NO_ERROR);
    }
    else   // Regular case
    {
        mDevice->DrawPrimitive(mPrimitiveType, 0, mPrimitiveCount);
        return gl::Error(GL_NO_ERROR);
    }
}

gl::Error Renderer9::drawElementsImpl(const gl::Data &data,
                                      const TranslatedIndexData &indexInfo,
                                      GLenum mode,
                                      GLsizei count,
                                      GLenum type,
                                      const GLvoid *indices,
                                      GLsizei /*instances*/)
{
    startScene();

    int minIndex = static_cast<int>(indexInfo.indexRange.start);

    gl::VertexArray *vao           = data.state->getVertexArray();
    gl::Buffer *elementArrayBuffer = vao->getElementArrayBuffer().get();

    if (mode == GL_POINTS)
    {
        return drawIndexedPoints(count, type, indices, minIndex, elementArrayBuffer);
    }
    else if (mode == GL_LINE_LOOP)
    {
        return drawLineLoop(count, type, indices, minIndex, elementArrayBuffer);
    }
    else
    {
        size_t vertexCount = indexInfo.indexRange.vertexCount();
        for (int i = 0; i < mRepeatDraw; i++)
        {
            mDevice->DrawIndexedPrimitive(mPrimitiveType, -minIndex, minIndex,
                                          static_cast<UINT>(vertexCount), indexInfo.startIndex,
                                          mPrimitiveCount);
        }
        return gl::Error(GL_NO_ERROR);
    }
}

gl::Error Renderer9::drawLineLoop(GLsizei count, GLenum type, const GLvoid *indices, int minIndex, gl::Buffer *elementArrayBuffer)
{
    // Get the raw indices for an indexed draw
    if (type != GL_NONE && elementArrayBuffer)
    {
        BufferD3D *storage = GetImplAs<BufferD3D>(elementArrayBuffer);
        intptr_t offset = reinterpret_cast<intptr_t>(indices);
        const uint8_t *bufferData = NULL;
        gl::Error error = storage->getData(&bufferData);
        if (error.isError())
        {
            return error;
        }
        indices = bufferData + offset;
    }

    unsigned int startIndex = 0;

    if (getRendererExtensions().elementIndexUint)
    {
        if (!mLineLoopIB)
        {
            mLineLoopIB = new StreamingIndexBufferInterface(this);
            gl::Error error = mLineLoopIB->reserveBufferSpace(INITIAL_INDEX_BUFFER_SIZE, GL_UNSIGNED_INT);
            if (error.isError())
            {
                SafeDelete(mLineLoopIB);
                return error;
            }
        }

        // Checked by Renderer9::applyPrimitiveType
        ASSERT(count >= 0);

        if (static_cast<unsigned int>(count) + 1 > (std::numeric_limits<unsigned int>::max() / sizeof(unsigned int)))
        {
            return gl::Error(GL_OUT_OF_MEMORY, "Failed to create a 32-bit looping index buffer for GL_LINE_LOOP, too many indices required.");
        }

        const unsigned int spaceNeeded = (static_cast<unsigned int>(count)+1) * sizeof(unsigned int);
        gl::Error error = mLineLoopIB->reserveBufferSpace(spaceNeeded, GL_UNSIGNED_INT);
        if (error.isError())
        {
            return error;
        }

        void* mappedMemory = NULL;
        unsigned int offset = 0;
        error = mLineLoopIB->mapBuffer(spaceNeeded, &mappedMemory, &offset);
        if (error.isError())
        {
            return error;
        }

        startIndex = static_cast<unsigned int>(offset) / 4;
        unsigned int *data = reinterpret_cast<unsigned int*>(mappedMemory);

        switch (type)
        {
          case GL_NONE:   // Non-indexed draw
            for (int i = 0; i < count; i++)
            {
                data[i] = i;
            }
            data[count] = 0;
            break;
          case GL_UNSIGNED_BYTE:
            for (int i = 0; i < count; i++)
            {
                data[i] = static_cast<const GLubyte*>(indices)[i];
            }
            data[count] = static_cast<const GLubyte*>(indices)[0];
            break;
          case GL_UNSIGNED_SHORT:
            for (int i = 0; i < count; i++)
            {
                data[i] = static_cast<const GLushort*>(indices)[i];
            }
            data[count] = static_cast<const GLushort*>(indices)[0];
            break;
          case GL_UNSIGNED_INT:
            for (int i = 0; i < count; i++)
            {
                data[i] = static_cast<const GLuint*>(indices)[i];
            }
            data[count] = static_cast<const GLuint*>(indices)[0];
            break;
          default: UNREACHABLE();
        }

        error = mLineLoopIB->unmapBuffer();
        if (error.isError())
        {
            return error;
        }
    }
    else
    {
        if (!mLineLoopIB)
        {
            mLineLoopIB = new StreamingIndexBufferInterface(this);
            gl::Error error = mLineLoopIB->reserveBufferSpace(INITIAL_INDEX_BUFFER_SIZE, GL_UNSIGNED_SHORT);
            if (error.isError())
            {
                SafeDelete(mLineLoopIB);
                return error;
            }
        }

        // Checked by Renderer9::applyPrimitiveType
        ASSERT(count >= 0);

        if (static_cast<unsigned int>(count) + 1 > (std::numeric_limits<unsigned short>::max() / sizeof(unsigned short)))
        {
            return gl::Error(GL_OUT_OF_MEMORY, "Failed to create a 16-bit looping index buffer for GL_LINE_LOOP, too many indices required.");
        }

        const unsigned int spaceNeeded = (static_cast<unsigned int>(count) + 1) * sizeof(unsigned short);
        gl::Error error = mLineLoopIB->reserveBufferSpace(spaceNeeded, GL_UNSIGNED_SHORT);
        if (error.isError())
        {
            return error;
        }

        void* mappedMemory = NULL;
        unsigned int offset;
        error = mLineLoopIB->mapBuffer(spaceNeeded, &mappedMemory, &offset);
        if (error.isError())
        {
            return error;
        }

        startIndex = static_cast<unsigned int>(offset) / 2;
        unsigned short *data = reinterpret_cast<unsigned short*>(mappedMemory);

        switch (type)
        {
          case GL_NONE:   // Non-indexed draw
            for (int i = 0; i < count; i++)
            {
                data[i] = static_cast<unsigned short>(i);
            }
            data[count] = 0;
            break;
          case GL_UNSIGNED_BYTE:
            for (int i = 0; i < count; i++)
            {
                data[i] = static_cast<const GLubyte*>(indices)[i];
            }
            data[count] = static_cast<const GLubyte*>(indices)[0];
            break;
          case GL_UNSIGNED_SHORT:
            for (int i = 0; i < count; i++)
            {
                data[i] = static_cast<const GLushort*>(indices)[i];
            }
            data[count] = static_cast<const GLushort*>(indices)[0];
            break;
          case GL_UNSIGNED_INT:
            for (int i = 0; i < count; i++)
            {
                data[i] = static_cast<unsigned short>(static_cast<const GLuint*>(indices)[i]);
            }
            data[count] = static_cast<unsigned short>(static_cast<const GLuint*>(indices)[0]);
            break;
          default: UNREACHABLE();
        }

        error = mLineLoopIB->unmapBuffer();
        if (error.isError())
        {
            return error;
        }
    }

    if (mAppliedIBSerial != mLineLoopIB->getSerial())
    {
        IndexBuffer9 *indexBuffer = GetAs<IndexBuffer9>(mLineLoopIB->getIndexBuffer());

        mDevice->SetIndices(indexBuffer->getBuffer());
        mAppliedIBSerial = mLineLoopIB->getSerial();
    }

    mDevice->DrawIndexedPrimitive(D3DPT_LINESTRIP, -minIndex, minIndex, count, startIndex, count);

    return gl::Error(GL_NO_ERROR);
}

template <typename T>
static gl::Error drawPoints(IDirect3DDevice9* device, GLsizei count, const GLvoid *indices, int minIndex)
{
    for (int i = 0; i < count; i++)
    {
        unsigned int indexValue = static_cast<unsigned int>(static_cast<const T*>(indices)[i]) - minIndex;
        device->DrawPrimitive(D3DPT_POINTLIST, indexValue, 1);
    }

    return gl::Error(GL_NO_ERROR);
}

gl::Error Renderer9::drawIndexedPoints(GLsizei count, GLenum type, const GLvoid *indices, int minIndex, gl::Buffer *elementArrayBuffer)
{
    // Drawing index point lists is unsupported in d3d9, fall back to a regular DrawPrimitive call
    // for each individual point. This call is not expected to happen often.

    if (elementArrayBuffer)
    {
        BufferD3D *storage = GetImplAs<BufferD3D>(elementArrayBuffer);
        intptr_t offset = reinterpret_cast<intptr_t>(indices);

        const uint8_t *bufferData = NULL;
        gl::Error error = storage->getData(&bufferData);
        if (error.isError())
        {
            return error;
        }

        indices = bufferData + offset;
    }

    switch (type)
    {
        case GL_UNSIGNED_BYTE:  return drawPoints<GLubyte>(mDevice, count, indices, minIndex);
        case GL_UNSIGNED_SHORT: return drawPoints<GLushort>(mDevice, count, indices, minIndex);
        case GL_UNSIGNED_INT:   return drawPoints<GLuint>(mDevice, count, indices, minIndex);
        default: UNREACHABLE(); return gl::Error(GL_INVALID_OPERATION);
    }
}

gl::Error Renderer9::getCountingIB(size_t count, StaticIndexBufferInterface **outIB)
{
    // Update the counting index buffer if it is not large enough or has not been created yet.
    if (count <= 65536)   // 16-bit indices
    {
        const unsigned int spaceNeeded = static_cast<unsigned int>(count) * sizeof(unsigned short);

        if (!mCountingIB || mCountingIB->getBufferSize() < spaceNeeded)
        {
            SafeDelete(mCountingIB);
            mCountingIB = new StaticIndexBufferInterface(this);
            mCountingIB->reserveBufferSpace(spaceNeeded, GL_UNSIGNED_SHORT);

            void *mappedMemory = NULL;
            gl::Error error = mCountingIB->mapBuffer(spaceNeeded, &mappedMemory, NULL);
            if (error.isError())
            {
                return error;
            }

            unsigned short *data = reinterpret_cast<unsigned short*>(mappedMemory);
            for (size_t i = 0; i < count; i++)
            {
                data[i] = static_cast<unsigned short>(i);
            }

            error = mCountingIB->unmapBuffer();
            if (error.isError())
            {
                return error;
            }
        }
    }
    else if (getRendererExtensions().elementIndexUint)
    {
        const unsigned int spaceNeeded = static_cast<unsigned int>(count) * sizeof(unsigned int);

        if (!mCountingIB || mCountingIB->getBufferSize() < spaceNeeded)
        {
            SafeDelete(mCountingIB);
            mCountingIB = new StaticIndexBufferInterface(this);
            mCountingIB->reserveBufferSpace(spaceNeeded, GL_UNSIGNED_INT);

            void *mappedMemory = NULL;
            gl::Error error = mCountingIB->mapBuffer(spaceNeeded, &mappedMemory, NULL);
            if (error.isError())
            {
                return error;
            }

            unsigned int *data = reinterpret_cast<unsigned int*>(mappedMemory);
            for (unsigned int i = 0; i < count; i++)
            {
                data[i] = i;
            }

            error = mCountingIB->unmapBuffer();
            if (error.isError())
            {
                return error;
            }
        }
    }
    else
    {
        return gl::Error(GL_OUT_OF_MEMORY, "Could not create a counting index buffer for glDrawArraysInstanced.");
    }

    *outIB = mCountingIB;
    return gl::Error(GL_NO_ERROR);
}

gl::Error Renderer9::applyShadersImpl(const gl::Data &data, GLenum /*drawMode*/)
{
    ProgramD3D *programD3D  = GetImplAs<ProgramD3D>(data.state->getProgram());
    const auto &inputLayout = programD3D->getCachedInputLayout();

    ShaderExecutableD3D *vertexExe = NULL;
    gl::Error error = programD3D->getVertexExecutableForInputLayout(inputLayout, &vertexExe, nullptr);
    if (error.isError())
    {
        return error;
    }

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

    IDirect3DVertexShader9 *vertexShader = (vertexExe ? GetAs<ShaderExecutable9>(vertexExe)->getVertexShader() : nullptr);
    IDirect3DPixelShader9 *pixelShader = (pixelExe ? GetAs<ShaderExecutable9>(pixelExe)->getPixelShader() : nullptr);

    if (vertexShader != mAppliedVertexShader)
    {
        mDevice->SetVertexShader(vertexShader);
        mAppliedVertexShader = vertexShader;
    }

    if (pixelShader != mAppliedPixelShader)
    {
        mDevice->SetPixelShader(pixelShader);
        mAppliedPixelShader = pixelShader;
    }

    // D3D9 has a quirk where creating multiple shaders with the same content
    // can return the same shader pointer. Because GL programs store different data
    // per-program, checking the program serial guarantees we upload fresh
    // uniform data even if our shader pointers are the same.
    // https://code.google.com/p/angleproject/issues/detail?id=661
    unsigned int programSerial = programD3D->getSerial();
    if (programSerial != mAppliedProgramSerial)
    {
        programD3D->dirtyAllUniforms();
        mStateManager.forceSetDXUniformsState();
        mAppliedProgramSerial = programSerial;
    }

    return gl::Error(GL_NO_ERROR);
}

gl::Error Renderer9::applyUniforms(const ProgramD3D &programD3D,
                                   GLenum /*drawMode*/,
                                   const std::vector<D3DUniform *> &uniformArray)
{
    for (const D3DUniform *targetUniform : uniformArray)
    {
        if (!targetUniform->dirty)
            continue;

        GLfloat *f = (GLfloat *)targetUniform->data;
        GLint *i   = (GLint *)targetUniform->data;

        switch (targetUniform->type)
        {
            case GL_SAMPLER_2D:
            case GL_SAMPLER_CUBE:
                break;
            case GL_BOOL:
            case GL_BOOL_VEC2:
            case GL_BOOL_VEC3:
            case GL_BOOL_VEC4:
                applyUniformnbv(targetUniform, i);
                break;
            case GL_FLOAT:
            case GL_FLOAT_VEC2:
            case GL_FLOAT_VEC3:
            case GL_FLOAT_VEC4:
            case GL_FLOAT_MAT2:
            case GL_FLOAT_MAT3:
            case GL_FLOAT_MAT4:
                applyUniformnfv(targetUniform, f);
                break;
            case GL_INT:
            case GL_INT_VEC2:
            case GL_INT_VEC3:
            case GL_INT_VEC4:
                applyUniformniv(targetUniform, i);
                break;
            default:
                UNREACHABLE();
        }
    }

    // Driver uniforms
    mStateManager.setShaderConstants();

    return gl::Error(GL_NO_ERROR);
}

void Renderer9::applyUniformnfv(const D3DUniform *targetUniform, const GLfloat *v)
{
    if (targetUniform->isReferencedByFragmentShader())
    {
        mDevice->SetPixelShaderConstantF(targetUniform->psRegisterIndex, v, targetUniform->registerCount);
    }

    if (targetUniform->isReferencedByVertexShader())
    {
        mDevice->SetVertexShaderConstantF(targetUniform->vsRegisterIndex, v, targetUniform->registerCount);
    }
}

void Renderer9::applyUniformniv(const D3DUniform *targetUniform, const GLint *v)
{
    ASSERT(targetUniform->registerCount <= MAX_VERTEX_CONSTANT_VECTORS_D3D9);
    GLfloat vector[MAX_VERTEX_CONSTANT_VECTORS_D3D9][4];

    for (unsigned int i = 0; i < targetUniform->registerCount; i++)
    {
        vector[i][0] = (GLfloat)v[4 * i + 0];
        vector[i][1] = (GLfloat)v[4 * i + 1];
        vector[i][2] = (GLfloat)v[4 * i + 2];
        vector[i][3] = (GLfloat)v[4 * i + 3];
    }

    applyUniformnfv(targetUniform, (GLfloat*)vector);
}

void Renderer9::applyUniformnbv(const D3DUniform *targetUniform, const GLint *v)
{
    ASSERT(targetUniform->registerCount <= MAX_VERTEX_CONSTANT_VECTORS_D3D9);
    GLfloat vector[MAX_VERTEX_CONSTANT_VECTORS_D3D9][4];

    for (unsigned int i = 0; i < targetUniform->registerCount; i++)
    {
        vector[i][0] = (v[4 * i + 0] == GL_FALSE) ? 0.0f : 1.0f;
        vector[i][1] = (v[4 * i + 1] == GL_FALSE) ? 0.0f : 1.0f;
        vector[i][2] = (v[4 * i + 2] == GL_FALSE) ? 0.0f : 1.0f;
        vector[i][3] = (v[4 * i + 3] == GL_FALSE) ? 0.0f : 1.0f;
    }

    applyUniformnfv(targetUniform, (GLfloat*)vector);
}

gl::Error Renderer9::clear(const ClearParameters &clearParams,
                           const gl::FramebufferAttachment *colorBuffer,
                           const gl::FramebufferAttachment *depthStencilBuffer)
{
    if (clearParams.colorClearType != GL_FLOAT)
    {
        // Clearing buffers with non-float values is not supported by Renderer9 and ES 2.0
        UNREACHABLE();
        return gl::Error(GL_INVALID_OPERATION);
    }

    bool clearColor = clearParams.clearColor[0];
    for (unsigned int i = 0; i < ArraySize(clearParams.clearColor); i++)
    {
        if (clearParams.clearColor[i] != clearColor)
        {
            // Clearing individual buffers other than buffer zero is not supported by Renderer9 and ES 2.0
            UNREACHABLE();
            return gl::Error(GL_INVALID_OPERATION);
        }
    }

    float depth = gl::clamp01(clearParams.depthClearValue);
    DWORD stencil = clearParams.stencilClearValue & 0x000000FF;

    unsigned int stencilUnmasked = 0x0;
    if (clearParams.clearStencil && depthStencilBuffer->getStencilSize() > 0)
    {
        ASSERT(depthStencilBuffer != nullptr);

        RenderTargetD3D *stencilRenderTarget = nullptr;
        gl::Error error = depthStencilBuffer->getRenderTarget(&stencilRenderTarget);
        if (error.isError())
        {
            return error;
        }

        RenderTarget9 *stencilRenderTarget9 = GetAs<RenderTarget9>(stencilRenderTarget);
        ASSERT(stencilRenderTarget9);

        const d3d9::D3DFormat &d3dFormatInfo = d3d9::GetD3DFormatInfo(stencilRenderTarget9->getD3DFormat());
        stencilUnmasked = (0x1 << d3dFormatInfo.stencilBits) - 1;
    }

    const bool needMaskedStencilClear = clearParams.clearStencil &&
                                        (clearParams.stencilWriteMask & stencilUnmasked) != stencilUnmasked;

    bool needMaskedColorClear = false;
    D3DCOLOR color = D3DCOLOR_ARGB(255, 0, 0, 0);
    if (clearColor)
    {
        ASSERT(colorBuffer != nullptr);

        RenderTargetD3D *colorRenderTarget = NULL;
        gl::Error error = colorBuffer->getRenderTarget(&colorRenderTarget);
        if (error.isError())
        {
            return error;
        }

        RenderTarget9 *colorRenderTarget9 = GetAs<RenderTarget9>(colorRenderTarget);
        ASSERT(colorRenderTarget9);

        const gl::InternalFormat &formatInfo = gl::GetInternalFormatInfo(colorBuffer->getInternalFormat());
        const d3d9::D3DFormat &d3dFormatInfo = d3d9::GetD3DFormatInfo(colorRenderTarget9->getD3DFormat());

        color = D3DCOLOR_ARGB(gl::unorm<8>((formatInfo.alphaBits == 0 && d3dFormatInfo.alphaBits > 0) ? 1.0f : clearParams.colorFClearValue.alpha),
                              gl::unorm<8>((formatInfo.redBits   == 0 && d3dFormatInfo.redBits   > 0) ? 0.0f : clearParams.colorFClearValue.red),
                              gl::unorm<8>((formatInfo.greenBits == 0 && d3dFormatInfo.greenBits > 0) ? 0.0f : clearParams.colorFClearValue.green),
                              gl::unorm<8>((formatInfo.blueBits  == 0 && d3dFormatInfo.blueBits  > 0) ? 0.0f : clearParams.colorFClearValue.blue));

        if ((formatInfo.redBits   > 0 && !clearParams.colorMaskRed) ||
            (formatInfo.greenBits > 0 && !clearParams.colorMaskGreen) ||
            (formatInfo.blueBits  > 0 && !clearParams.colorMaskBlue) ||
            (formatInfo.alphaBits > 0 && !clearParams.colorMaskAlpha))
        {
            needMaskedColorClear = true;
        }
    }

    if (needMaskedColorClear || needMaskedStencilClear)
    {
        // State which is altered in all paths from this point to the clear call is saved.
        // State which is altered in only some paths will be flagged dirty in the case that
        //  that path is taken.
        HRESULT hr;
        if (mMaskedClearSavedState == NULL)
        {
            hr = mDevice->BeginStateBlock();
            ASSERT(SUCCEEDED(hr) || hr == D3DERR_OUTOFVIDEOMEMORY || hr == E_OUTOFMEMORY);

            mDevice->SetRenderState(D3DRS_ZWRITEENABLE, FALSE);
            mDevice->SetRenderState(D3DRS_ZFUNC, D3DCMP_ALWAYS);
            mDevice->SetRenderState(D3DRS_ZENABLE, FALSE);
            mDevice->SetRenderState(D3DRS_CULLMODE, D3DCULL_NONE);
            mDevice->SetRenderState(D3DRS_FILLMODE, D3DFILL_SOLID);
            mDevice->SetRenderState(D3DRS_ALPHATESTENABLE, FALSE);
            mDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, FALSE);
            mDevice->SetRenderState(D3DRS_CLIPPLANEENABLE, 0);
            mDevice->SetRenderState(D3DRS_COLORWRITEENABLE, 0);
            mDevice->SetRenderState(D3DRS_STENCILENABLE, FALSE);
            mDevice->SetPixelShader(NULL);
            mDevice->SetVertexShader(NULL);
            mDevice->SetFVF(D3DFVF_XYZRHW | D3DFVF_DIFFUSE);
            mDevice->SetStreamSource(0, NULL, 0, 0);
            mDevice->SetRenderState(D3DRS_SEPARATEALPHABLENDENABLE, TRUE);
            mDevice->SetTextureStageState(0, D3DTSS_COLOROP, D3DTOP_SELECTARG1);
            mDevice->SetTextureStageState(0, D3DTSS_COLORARG1, D3DTA_TFACTOR);
            mDevice->SetTextureStageState(0, D3DTSS_ALPHAOP, D3DTOP_SELECTARG1);
            mDevice->SetTextureStageState(0, D3DTSS_ALPHAARG1, D3DTA_TFACTOR);
            mDevice->SetRenderState(D3DRS_TEXTUREFACTOR, color);
            mDevice->SetRenderState(D3DRS_MULTISAMPLEMASK, 0xFFFFFFFF);

            for(int i = 0; i < gl::MAX_VERTEX_ATTRIBS; i++)
            {
                mDevice->SetStreamSourceFreq(i, 1);
            }

            hr = mDevice->EndStateBlock(&mMaskedClearSavedState);
            ASSERT(SUCCEEDED(hr) || hr == D3DERR_OUTOFVIDEOMEMORY || hr == E_OUTOFMEMORY);
        }

        ASSERT(mMaskedClearSavedState != NULL);

        if (mMaskedClearSavedState != NULL)
        {
            hr = mMaskedClearSavedState->Capture();
            ASSERT(SUCCEEDED(hr));
        }

        mDevice->SetRenderState(D3DRS_ZWRITEENABLE, FALSE);
        mDevice->SetRenderState(D3DRS_ZFUNC, D3DCMP_ALWAYS);
        mDevice->SetRenderState(D3DRS_ZENABLE, FALSE);
        mDevice->SetRenderState(D3DRS_CULLMODE, D3DCULL_NONE);
        mDevice->SetRenderState(D3DRS_FILLMODE, D3DFILL_SOLID);
        mDevice->SetRenderState(D3DRS_ALPHATESTENABLE, FALSE);
        mDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, FALSE);
        mDevice->SetRenderState(D3DRS_CLIPPLANEENABLE, 0);

        if (clearColor)
        {
            mDevice->SetRenderState(D3DRS_COLORWRITEENABLE,
                                    gl_d3d9::ConvertColorMask(clearParams.colorMaskRed,
                                                              clearParams.colorMaskGreen,
                                                              clearParams.colorMaskBlue,
                                                              clearParams.colorMaskAlpha));
        }
        else
        {
            mDevice->SetRenderState(D3DRS_COLORWRITEENABLE, 0);
        }

        if (stencilUnmasked != 0x0 && clearParams.clearStencil)
        {
            mDevice->SetRenderState(D3DRS_STENCILENABLE, TRUE);
            mDevice->SetRenderState(D3DRS_TWOSIDEDSTENCILMODE, FALSE);
            mDevice->SetRenderState(D3DRS_STENCILFUNC, D3DCMP_ALWAYS);
            mDevice->SetRenderState(D3DRS_STENCILREF, stencil);
            mDevice->SetRenderState(D3DRS_STENCILWRITEMASK, clearParams.stencilWriteMask);
            mDevice->SetRenderState(D3DRS_STENCILFAIL, D3DSTENCILOP_REPLACE);
            mDevice->SetRenderState(D3DRS_STENCILZFAIL, D3DSTENCILOP_REPLACE);
            mDevice->SetRenderState(D3DRS_STENCILPASS, D3DSTENCILOP_REPLACE);
        }
        else
        {
            mDevice->SetRenderState(D3DRS_STENCILENABLE, FALSE);
        }

        mDevice->SetPixelShader(NULL);
        mDevice->SetVertexShader(NULL);
        mDevice->SetFVF(D3DFVF_XYZRHW);
        mDevice->SetRenderState(D3DRS_SEPARATEALPHABLENDENABLE, TRUE);
        mDevice->SetTextureStageState(0, D3DTSS_COLOROP, D3DTOP_SELECTARG1);
        mDevice->SetTextureStageState(0, D3DTSS_COLORARG1, D3DTA_TFACTOR);
        mDevice->SetTextureStageState(0, D3DTSS_ALPHAOP, D3DTOP_SELECTARG1);
        mDevice->SetTextureStageState(0, D3DTSS_ALPHAARG1, D3DTA_TFACTOR);
        mDevice->SetRenderState(D3DRS_TEXTUREFACTOR, color);
        mDevice->SetRenderState(D3DRS_MULTISAMPLEMASK, 0xFFFFFFFF);

        for(int i = 0; i < gl::MAX_VERTEX_ATTRIBS; i++)
        {
            mDevice->SetStreamSourceFreq(i, 1);
        }

        int renderTargetWidth  = mStateManager.getRenderTargetWidth();
        int renderTargetHeight = mStateManager.getRenderTargetHeight();

        float quad[4][4];   // A quadrilateral covering the target, aligned to match the edges
        quad[0][0] = -0.5f;
        quad[0][1] = renderTargetHeight - 0.5f;
        quad[0][2] = 0.0f;
        quad[0][3] = 1.0f;

        quad[1][0] = renderTargetWidth - 0.5f;
        quad[1][1] = renderTargetHeight - 0.5f;
        quad[1][2] = 0.0f;
        quad[1][3] = 1.0f;

        quad[2][0] = -0.5f;
        quad[2][1] = -0.5f;
        quad[2][2] = 0.0f;
        quad[2][3] = 1.0f;

        quad[3][0] = renderTargetWidth - 0.5f;
        quad[3][1] = -0.5f;
        quad[3][2] = 0.0f;
        quad[3][3] = 1.0f;

        startScene();
        mDevice->DrawPrimitiveUP(D3DPT_TRIANGLESTRIP, 2, quad, sizeof(float[4]));

        if (clearParams.clearDepth)
        {
            mDevice->SetRenderState(D3DRS_ZENABLE, TRUE);
            mDevice->SetRenderState(D3DRS_ZWRITEENABLE, TRUE);
            mDevice->Clear(0, NULL, D3DCLEAR_ZBUFFER, color, depth, stencil);
        }

        if (mMaskedClearSavedState != NULL)
        {
            mMaskedClearSavedState->Apply();
        }
    }
    else if (clearColor || clearParams.clearDepth || clearParams.clearStencil)
    {
        DWORD dxClearFlags = 0;
        if (clearColor)
        {
            dxClearFlags |= D3DCLEAR_TARGET;
        }
        if (clearParams.clearDepth)
        {
            dxClearFlags |= D3DCLEAR_ZBUFFER;
        }
        if (clearParams.clearStencil)
        {
            dxClearFlags |= D3DCLEAR_STENCIL;
        }

        mDevice->Clear(0, NULL, dxClearFlags, color, depth, stencil);
    }

    return gl::Error(GL_NO_ERROR);
}

void Renderer9::markAllStateDirty()
{
    mAppliedRenderTargetSerial = 0;
    mAppliedDepthStencilSerial = 0;
    mDepthStencilInitialized = false;
    mRenderTargetDescInitialized = false;

    mStateManager.forceSetRasterState();
    mStateManager.forceSetDepthStencilState();
    mStateManager.forceSetBlendState();
    mStateManager.forceSetScissorState();
    mStateManager.forceSetViewportState();

    ASSERT(mCurVertexSamplerStates.size() == mCurVertexTextures.size());
    for (unsigned int i = 0; i < mCurVertexTextures.size(); i++)
    {
        mCurVertexSamplerStates[i].forceSet = true;
        mCurVertexTextures[i]               = angle::DirtyPointer;
    }

    ASSERT(mCurPixelSamplerStates.size() == mCurPixelTextures.size());
    for (unsigned int i = 0; i < mCurPixelSamplerStates.size(); i++)
    {
        mCurPixelSamplerStates[i].forceSet = true;
        mCurPixelTextures[i]               = angle::DirtyPointer;
    }

    mAppliedIBSerial = 0;
    mAppliedVertexShader = NULL;
    mAppliedPixelShader = NULL;
    mAppliedProgramSerial = 0;
    mStateManager.forceSetDXUniformsState();

    mVertexDeclarationCache.markStateDirty();
}

void Renderer9::releaseDeviceResources()
{
    for (size_t i = 0; i < mEventQueryPool.size(); i++)
    {
        SafeRelease(mEventQueryPool[i]);
    }
    mEventQueryPool.clear();

    SafeRelease(mMaskedClearSavedState);

    mVertexShaderCache.clear();
    mPixelShaderCache.clear();

    SafeDelete(mBlit);
    SafeDelete(mVertexDataManager);
    SafeDelete(mIndexDataManager);
    SafeDelete(mLineLoopIB);
    SafeDelete(mCountingIB);

    for (int i = 0; i < NUM_NULL_COLORBUFFER_CACHE_ENTRIES; i++)
    {
        SafeDelete(mNullColorbufferCache[i].buffer);
    }
}

// set notify to true to broadcast a message to all contexts of the device loss
bool Renderer9::testDeviceLost()
{
    HRESULT status = getDeviceStatusCode();
    bool isLost = FAILED(status);

    if (isLost)
    {
        // ensure we note the device loss --
        // we'll probably get this done again by notifyDeviceLost
        // but best to remember it!
        // Note that we don't want to clear the device loss status here
        // -- this needs to be done by resetDevice
        mDeviceLost = true;
    }

    return isLost;
}

HRESULT Renderer9::getDeviceStatusCode()
{
    HRESULT status = D3D_OK;

    if (mDeviceEx)
    {
        status = mDeviceEx->CheckDeviceState(NULL);
    }
    else if (mDevice)
    {
        status = mDevice->TestCooperativeLevel();
    }

    return status;
}

bool Renderer9::testDeviceResettable()
{
    // On D3D9Ex, DEVICELOST represents a hung device that needs to be restarted
    // DEVICEREMOVED indicates the device has been stopped and must be recreated
    switch (getDeviceStatusCode())
    {
      case D3DERR_DEVICENOTRESET:
      case D3DERR_DEVICEHUNG:
        return true;
      case D3DERR_DEVICELOST:
        return (mDeviceEx != NULL);
      case D3DERR_DEVICEREMOVED:
        ASSERT(mDeviceEx != NULL);
        return isRemovedDeviceResettable();
      default:
        return false;
    }
}

bool Renderer9::resetDevice()
{
    releaseDeviceResources();

    D3DPRESENT_PARAMETERS presentParameters = getDefaultPresentParameters();

    HRESULT result = D3D_OK;
    bool lost = testDeviceLost();
    bool removedDevice = (getDeviceStatusCode() == D3DERR_DEVICEREMOVED);

    // Device Removed is a feature which is only present with D3D9Ex
    ASSERT(mDeviceEx != NULL || !removedDevice);

    for (int attempts = 3; lost && attempts > 0; attempts--)
    {
        if (removedDevice)
        {
            // Device removed, which may trigger on driver reinstallation,
            // may cause a longer wait other reset attempts before the
            // system is ready to handle creating a new device.
            Sleep(800);
            lost = !resetRemovedDevice();
        }
        else if (mDeviceEx)
        {
            Sleep(500);   // Give the graphics driver some CPU time
            result = mDeviceEx->ResetEx(&presentParameters, NULL);
            lost = testDeviceLost();
        }
        else
        {
            result = mDevice->TestCooperativeLevel();
            while (result == D3DERR_DEVICELOST)
            {
                Sleep(100);   // Give the graphics driver some CPU time
                result = mDevice->TestCooperativeLevel();
            }

            if (result == D3DERR_DEVICENOTRESET)
            {
                result = mDevice->Reset(&presentParameters);
            }
            lost = testDeviceLost();
        }
    }

    if (FAILED(result))
    {
        ERR("Reset/ResetEx failed multiple times: 0x%08X", result);
        return false;
    }

    if (removedDevice && lost)
    {
        ERR("Device lost reset failed multiple times");
        return false;
    }

    // If the device was removed, we already finished re-initialization in resetRemovedDevice
    if (!removedDevice)
    {
        // reset device defaults
        initializeDevice();
    }

    mDeviceLost = false;

    return true;
}

bool Renderer9::isRemovedDeviceResettable() const
{
    bool success = false;

#if ANGLE_D3D9EX == ANGLE_ENABLED
    IDirect3D9Ex *d3d9Ex = NULL;
    typedef HRESULT (WINAPI *Direct3DCreate9ExFunc)(UINT, IDirect3D9Ex**);
    Direct3DCreate9ExFunc Direct3DCreate9ExPtr = reinterpret_cast<Direct3DCreate9ExFunc>(GetProcAddress(mD3d9Module, "Direct3DCreate9Ex"));

    if (Direct3DCreate9ExPtr && SUCCEEDED(Direct3DCreate9ExPtr(D3D_SDK_VERSION, &d3d9Ex)))
    {
        D3DCAPS9 deviceCaps;
        HRESULT result = d3d9Ex->GetDeviceCaps(mAdapter, mDeviceType, &deviceCaps);
        success = SUCCEEDED(result);
    }

    SafeRelease(d3d9Ex);
#else
    ASSERT(UNREACHABLE());
#endif

    return success;
}

bool Renderer9::resetRemovedDevice()
{
    // From http://msdn.microsoft.com/en-us/library/windows/desktop/bb172554(v=vs.85).aspx:
    // The hardware adapter has been removed. Application must destroy the device, do enumeration of
    // adapters and create another Direct3D device. If application continues rendering without
    // calling Reset, the rendering calls will succeed. Applies to Direct3D 9Ex only.
    release();
    return !initialize().isError();
}

VendorID Renderer9::getVendorId() const
{
    return static_cast<VendorID>(mAdapterIdentifier.VendorId);
}

std::string Renderer9::getRendererDescription() const
{
    std::ostringstream rendererString;

    rendererString << mAdapterIdentifier.Description;
    if (getShareHandleSupport())
    {
        rendererString << " Direct3D9Ex";
    }
    else
    {
        rendererString << " Direct3D9";
    }

    rendererString << " vs_" << D3DSHADER_VERSION_MAJOR(mDeviceCaps.VertexShaderVersion) << "_" << D3DSHADER_VERSION_MINOR(mDeviceCaps.VertexShaderVersion);
    rendererString << " ps_" << D3DSHADER_VERSION_MAJOR(mDeviceCaps.PixelShaderVersion) << "_" << D3DSHADER_VERSION_MINOR(mDeviceCaps.PixelShaderVersion);

    return rendererString.str();
}

DeviceIdentifier Renderer9::getAdapterIdentifier() const
{
    DeviceIdentifier deviceIdentifier = { 0 };
    deviceIdentifier.VendorId = static_cast<UINT>(mAdapterIdentifier.VendorId);
    deviceIdentifier.DeviceId = static_cast<UINT>(mAdapterIdentifier.DeviceId);
    deviceIdentifier.SubSysId = static_cast<UINT>(mAdapterIdentifier.SubSysId);
    deviceIdentifier.Revision = static_cast<UINT>(mAdapterIdentifier.Revision);
    deviceIdentifier.FeatureLevel = 0;

    return deviceIdentifier;
}

unsigned int Renderer9::getReservedVertexUniformVectors() const
{
    return d3d9_gl::GetReservedVertexUniformVectors();
}

unsigned int Renderer9::getReservedFragmentUniformVectors() const
{
    return d3d9_gl::GetReservedFragmentUniformVectors();
}

unsigned int Renderer9::getReservedVertexUniformBuffers() const
{
    return 0;
}

unsigned int Renderer9::getReservedFragmentUniformBuffers() const
{
    return 0;
}

bool Renderer9::getShareHandleSupport() const
{
    // PIX doesn't seem to support using share handles, so disable them.
    return (mD3d9Ex != NULL) && !gl::DebugAnnotationsActive();
}

int Renderer9::getMajorShaderModel() const
{
    return D3DSHADER_VERSION_MAJOR(mDeviceCaps.PixelShaderVersion);
}

int Renderer9::getMinorShaderModel() const
{
    return D3DSHADER_VERSION_MINOR(mDeviceCaps.PixelShaderVersion);
}

std::string Renderer9::getShaderModelSuffix() const
{
    return "";
}

DWORD Renderer9::getCapsDeclTypes() const
{
    return mDeviceCaps.DeclTypes;
}

D3DPOOL Renderer9::getBufferPool(DWORD usage) const
{
    if (mD3d9Ex != NULL)
    {
        return D3DPOOL_DEFAULT;
    }
    else
    {
        if (!(usage & D3DUSAGE_DYNAMIC))
        {
            return D3DPOOL_MANAGED;
        }
    }

    return D3DPOOL_DEFAULT;
}

gl::Error Renderer9::copyImage2D(const gl::Framebuffer *framebuffer, const gl::Rectangle &sourceRect, GLenum destFormat,
                                 const gl::Offset &destOffset, TextureStorage *storage, GLint level)
{
    RECT rect;
    rect.left = sourceRect.x;
    rect.top = sourceRect.y;
    rect.right = sourceRect.x + sourceRect.width;
    rect.bottom = sourceRect.y + sourceRect.height;

    return mBlit->copy2D(framebuffer, rect, destFormat, destOffset, storage, level);
}

gl::Error Renderer9::copyImageCube(const gl::Framebuffer *framebuffer, const gl::Rectangle &sourceRect, GLenum destFormat,
                                   const gl::Offset &destOffset, TextureStorage *storage, GLenum target, GLint level)
{
    RECT rect;
    rect.left = sourceRect.x;
    rect.top = sourceRect.y;
    rect.right = sourceRect.x + sourceRect.width;
    rect.bottom = sourceRect.y + sourceRect.height;

    return mBlit->copyCube(framebuffer, rect, destFormat, destOffset, storage, target, level);
}

gl::Error Renderer9::copyImage3D(const gl::Framebuffer *framebuffer, const gl::Rectangle &sourceRect, GLenum destFormat,
                                const gl::Offset &destOffset, TextureStorage *storage, GLint level)
{
    // 3D textures are not available in the D3D9 backend.
    UNREACHABLE();
    return gl::Error(GL_INVALID_OPERATION);
}

gl::Error Renderer9::copyImage2DArray(const gl::Framebuffer *framebuffer, const gl::Rectangle &sourceRect, GLenum destFormat,
                                     const gl::Offset &destOffset, TextureStorage *storage, GLint level)
{
    // 2D array textures are not available in the D3D9 backend.
    UNREACHABLE();
    return gl::Error(GL_INVALID_OPERATION);
}

gl::Error Renderer9::createRenderTarget(int width, int height, GLenum format, GLsizei samples, RenderTargetD3D **outRT)
{
    const d3d9::TextureFormat &d3d9FormatInfo = d3d9::GetTextureFormatInfo(format);

    const gl::TextureCaps &textureCaps = getRendererTextureCaps().get(format);
    GLuint supportedSamples = textureCaps.getNearestSamples(samples);

    IDirect3DTexture9 *texture      = nullptr;
    IDirect3DSurface9 *renderTarget = NULL;
    if (width > 0 && height > 0)
    {
        bool requiresInitialization = false;
        HRESULT result = D3DERR_INVALIDCALL;

        const gl::InternalFormat &formatInfo = gl::GetInternalFormatInfo(format);
        if (formatInfo.depthBits > 0 || formatInfo.stencilBits > 0)
        {
            result = mDevice->CreateDepthStencilSurface(width, height, d3d9FormatInfo.renderFormat,
                                                        gl_d3d9::GetMultisampleType(supportedSamples),
                                                        0, FALSE, &renderTarget, NULL);
        }
        else
        {
            requiresInitialization = (d3d9FormatInfo.dataInitializerFunction != nullptr);
            if (supportedSamples > 0)
            {
                result = mDevice->CreateRenderTarget(width, height, d3d9FormatInfo.renderFormat,
                                                     gl_d3d9::GetMultisampleType(supportedSamples),
                                                     0, FALSE, &renderTarget, nullptr);
            }
            else
            {
                result = mDevice->CreateTexture(
                    width, height, 1, D3DUSAGE_RENDERTARGET, d3d9FormatInfo.texFormat,
                    getTexturePool(D3DUSAGE_RENDERTARGET), &texture, nullptr);
                if (!FAILED(result))
                {
                    result = texture->GetSurfaceLevel(0, &renderTarget);
                }
            }
        }

        if (FAILED(result))
        {
            ASSERT(result == D3DERR_OUTOFVIDEOMEMORY || result == E_OUTOFMEMORY);
            return gl::Error(GL_OUT_OF_MEMORY, "Failed to create render target, result: 0x%X.", result);
        }

        if (requiresInitialization)
        {
            // This format requires that the data be initialized before the render target can be used
            // Unfortunately this requires a Get call on the d3d device but it is far better than having
            // to mark the render target as lockable and copy data to the gpu.
            IDirect3DSurface9 *prevRenderTarget = NULL;
            mDevice->GetRenderTarget(0, &prevRenderTarget);
            mDevice->SetRenderTarget(0, renderTarget);
            mDevice->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_RGBA(0, 0, 0, 255), 0.0f, 0);
            mDevice->SetRenderTarget(0, prevRenderTarget);
        }
    }

    *outRT = new TextureRenderTarget9(texture, 0, renderTarget, format, width, height, 1,
                                      supportedSamples);
    return gl::Error(GL_NO_ERROR);
}

gl::Error Renderer9::createRenderTargetCopy(RenderTargetD3D *source, RenderTargetD3D **outRT)
{
    ASSERT(source != nullptr);

    RenderTargetD3D *newRT = nullptr;
    gl::Error error = createRenderTarget(source->getWidth(), source->getHeight(),
                                         source->getInternalFormat(), source->getSamples(), &newRT);
    if (error.isError())
    {
        return error;
    }

    RenderTarget9 *source9 = GetAs<RenderTarget9>(source);
    RenderTarget9 *dest9   = GetAs<RenderTarget9>(newRT);

    HRESULT result = mDevice->StretchRect(source9->getSurface(), nullptr, dest9->getSurface(),
                                          nullptr, D3DTEXF_NONE);
    if (FAILED(result))
    {
        ASSERT(result == D3DERR_OUTOFVIDEOMEMORY || result == E_OUTOFMEMORY);
        return gl::Error(GL_OUT_OF_MEMORY, "Failed to copy render target, result: 0x%X.", result);
    }

    *outRT = newRT;
    return gl::Error(GL_NO_ERROR);
}

FramebufferImpl *Renderer9::createFramebuffer(const gl::Framebuffer::Data &data)
{
    return new Framebuffer9(data, this);
}

ShaderImpl *Renderer9::createShader(const gl::Shader::Data &data)
{
    return new ShaderD3D(data);
}

ProgramImpl *Renderer9::createProgram(const gl::Program::Data &data)
{
    return new ProgramD3D(data, this);
}

gl::Error Renderer9::loadExecutable(const void *function,
                                    size_t length,
                                    ShaderType type,
                                    const std::vector<D3DVarying> &streamOutVaryings,
                                    bool separatedOutputBuffers,
                                    ShaderExecutableD3D **outExecutable)
{
    // Transform feedback is not supported in ES2 or D3D9
    ASSERT(streamOutVaryings.empty());

    switch (type)
    {
      case SHADER_VERTEX:
        {
            IDirect3DVertexShader9 *vshader = NULL;
            gl::Error error = createVertexShader((DWORD*)function, length, &vshader);
            if (error.isError())
            {
                return error;
            }
            *outExecutable = new ShaderExecutable9(function, length, vshader);
        }
        break;
      case SHADER_PIXEL:
        {
            IDirect3DPixelShader9 *pshader = NULL;
            gl::Error error = createPixelShader((DWORD*)function, length, &pshader);
            if (error.isError())
            {
                return error;
            }
            *outExecutable = new ShaderExecutable9(function, length, pshader);
        }
        break;
      default:
        UNREACHABLE();
        return gl::Error(GL_INVALID_OPERATION);
    }

    return gl::Error(GL_NO_ERROR);
}

gl::Error Renderer9::compileToExecutable(gl::InfoLog &infoLog,
                                         const std::string &shaderHLSL,
                                         ShaderType type,
                                         const std::vector<D3DVarying> &streamOutVaryings,
                                         bool separatedOutputBuffers,
                                         const D3DCompilerWorkarounds &workarounds,
                                         ShaderExecutableD3D **outExectuable)
{
    // Transform feedback is not supported in ES2 or D3D9
    ASSERT(streamOutVaryings.empty());

    const char *profileType = NULL;
    switch (type)
    {
      case SHADER_VERTEX:
        profileType = "vs";
        break;
      case SHADER_PIXEL:
        profileType = "ps";
        break;
      default:
        UNREACHABLE();
        return gl::Error(GL_INVALID_OPERATION);
    }
    unsigned int profileMajorVersion = (getMajorShaderModel() >= 3) ? 3 : 2;
    unsigned int profileMinorVersion = 0;
    std::string profile = FormatString("%s_%u_%u", profileType, profileMajorVersion, profileMinorVersion);

    UINT flags = ANGLE_COMPILE_OPTIMIZATION_LEVEL;

    if (workarounds.skipOptimization)
    {
        flags = D3DCOMPILE_SKIP_OPTIMIZATION;
    }
    else if (workarounds.useMaxOptimization)
    {
        flags = D3DCOMPILE_OPTIMIZATION_LEVEL3;
    }

    if (gl::DebugAnnotationsActive())
    {
#ifndef NDEBUG
        flags = D3DCOMPILE_SKIP_OPTIMIZATION;
#endif

        flags |= D3DCOMPILE_DEBUG;
    }

    // Sometimes D3DCompile will fail with the default compilation flags for complicated shaders when it would otherwise pass with alternative options.
    // Try the default flags first and if compilation fails, try some alternatives.
    std::vector<CompileConfig> configs;
    configs.push_back(CompileConfig(flags,                                  "default"            ));
    configs.push_back(CompileConfig(flags | D3DCOMPILE_AVOID_FLOW_CONTROL,  "avoid flow control" ));
    configs.push_back(CompileConfig(flags | D3DCOMPILE_PREFER_FLOW_CONTROL, "prefer flow control"));

    ID3DBlob *binary = NULL;
    std::string debugInfo;
    gl::Error error = mCompiler.compileToBinary(infoLog, shaderHLSL, profile, configs, NULL, &binary, &debugInfo);
    if (error.isError())
    {
        return error;
    }

    // It's possible that binary is NULL if the compiler failed in all configurations.  Set the executable to NULL
    // and return GL_NO_ERROR to signify that there was a link error but the internal state is still OK.
    if (!binary)
    {
        *outExectuable = NULL;
        return gl::Error(GL_NO_ERROR);
    }

    error = loadExecutable(binary->GetBufferPointer(), binary->GetBufferSize(), type,
                           streamOutVaryings, separatedOutputBuffers, outExectuable);

    SafeRelease(binary);
    if (error.isError())
    {
        return error;
    }

    if (!debugInfo.empty())
    {
        (*outExectuable)->appendDebugInfo(debugInfo);
    }

    return gl::Error(GL_NO_ERROR);
}

UniformStorageD3D *Renderer9::createUniformStorage(size_t storageSize)
{
    return new UniformStorageD3D(storageSize);
}

gl::Error Renderer9::boxFilter(IDirect3DSurface9 *source, IDirect3DSurface9 *dest)
{
    return mBlit->boxFilter(source, dest);
}

D3DPOOL Renderer9::getTexturePool(DWORD usage) const
{
    if (mD3d9Ex != NULL)
    {
        return D3DPOOL_DEFAULT;
    }
    else
    {
        if (!(usage & (D3DUSAGE_DEPTHSTENCIL | D3DUSAGE_RENDERTARGET)))
        {
            return D3DPOOL_MANAGED;
        }
    }

    return D3DPOOL_DEFAULT;
}

gl::Error Renderer9::copyToRenderTarget(IDirect3DSurface9 *dest, IDirect3DSurface9 *source, bool fromManaged)
{
    ASSERT(source && dest);

    HRESULT result = D3DERR_OUTOFVIDEOMEMORY;

    if (fromManaged)
    {
        D3DSURFACE_DESC desc;
        source->GetDesc(&desc);

        IDirect3DSurface9 *surf = 0;
        result = mDevice->CreateOffscreenPlainSurface(desc.Width, desc.Height, desc.Format, D3DPOOL_SYSTEMMEM, &surf, NULL);

        if (SUCCEEDED(result))
        {
            Image9::copyLockableSurfaces(surf, source);
            result = mDevice->UpdateSurface(surf, NULL, dest, NULL);
            SafeRelease(surf);
        }
    }
    else
    {
        endScene();
        result = mDevice->StretchRect(source, NULL, dest, NULL, D3DTEXF_NONE);
    }

    if (FAILED(result))
    {
        ASSERT(result == D3DERR_OUTOFVIDEOMEMORY || result == E_OUTOFMEMORY);
        return gl::Error(GL_OUT_OF_MEMORY, "Failed to blit internal texture, result: 0x%X.", result);
    }

    return gl::Error(GL_NO_ERROR);
}

ImageD3D *Renderer9::createImage()
{
    return new Image9(this);
}

gl::Error Renderer9::generateMipmap(ImageD3D *dest, ImageD3D *src)
{
    Image9 *src9 = GetAs<Image9>(src);
    Image9 *dst9 = GetAs<Image9>(dest);
    return Image9::generateMipmap(dst9, src9);
}

gl::Error Renderer9::generateMipmapsUsingD3D(TextureStorage *storage,
                                             const gl::TextureState &textureState)
{
    UNREACHABLE();
    return gl::Error(GL_NO_ERROR);
}

TextureStorage *Renderer9::createTextureStorage2D(SwapChainD3D *swapChain)
{
    SwapChain9 *swapChain9 = GetAs<SwapChain9>(swapChain);
    return new TextureStorage9_2D(this, swapChain9);
}

TextureStorage *Renderer9::createTextureStorageEGLImage(EGLImageD3D *eglImage)
{
    return new TextureStorage9_EGLImage(this, eglImage);
}

TextureStorage *Renderer9::createTextureStorage2D(GLenum internalformat, bool renderTarget, GLsizei width, GLsizei height, int levels, bool hintLevelZeroOnly)
{
    return new TextureStorage9_2D(this, internalformat, renderTarget, width, height, levels);
}

TextureStorage *Renderer9::createTextureStorageCube(GLenum internalformat, bool renderTarget, int size, int levels, bool hintLevelZeroOnly)
{
    return new TextureStorage9_Cube(this, internalformat, renderTarget, size, levels, hintLevelZeroOnly);
}

TextureStorage *Renderer9::createTextureStorage3D(GLenum internalformat, bool renderTarget, GLsizei width, GLsizei height, GLsizei depth, int levels)
{
    // 3D textures are not supported by the D3D9 backend.
    UNREACHABLE();

    return NULL;
}

TextureStorage *Renderer9::createTextureStorage2DArray(GLenum internalformat, bool renderTarget, GLsizei width, GLsizei height, GLsizei depth, int levels)
{
    // 2D array textures are not supported by the D3D9 backend.
    UNREACHABLE();

    return NULL;
}

TextureImpl *Renderer9::createTexture(GLenum target)
{
    switch(target)
    {
      case GL_TEXTURE_2D:       return new TextureD3D_2D(this);
      case GL_TEXTURE_CUBE_MAP: return new TextureD3D_Cube(this);
      default:                  UNREACHABLE();
    }

    return NULL;
}

RenderbufferImpl *Renderer9::createRenderbuffer()
{
    RenderbufferD3D *renderbuffer = new RenderbufferD3D(this);
    return renderbuffer;
}

bool Renderer9::getLUID(LUID *adapterLuid) const
{
    adapterLuid->HighPart = 0;
    adapterLuid->LowPart = 0;

    if (mD3d9Ex)
    {
        mD3d9Ex->GetAdapterLUID(mAdapter, adapterLuid);
        return true;
    }

    return false;
}

VertexConversionType Renderer9::getVertexConversionType(gl::VertexFormatType vertexFormatType) const
{
    return d3d9::GetVertexFormatInfo(getCapsDeclTypes(), vertexFormatType).conversionType;
}

GLenum Renderer9::getVertexComponentType(gl::VertexFormatType vertexFormatType) const
{
    return d3d9::GetVertexFormatInfo(getCapsDeclTypes(), vertexFormatType).componentType;
}

gl::ErrorOrResult<unsigned int> Renderer9::getVertexSpaceRequired(const gl::VertexAttribute &attrib,
                                                                  GLsizei count,
                                                                  GLsizei instances) const
{
    gl::VertexFormatType vertexFormatType = gl::GetVertexFormatType(attrib, GL_FLOAT);
    const d3d9::VertexFormat &d3d9VertexInfo =
        d3d9::GetVertexFormatInfo(getCapsDeclTypes(), vertexFormatType);

    if (!attrib.enabled)
    {
        return 16u;
    }

    unsigned int elementCount = 0;
    if (instances == 0 || attrib.divisor == 0)
    {
        elementCount = static_cast<unsigned int>(count);
    }
    else
    {
        // Round up to divisor, if possible
        elementCount = UnsignedCeilDivide(static_cast<unsigned int>(instances), attrib.divisor);
    }

    if (d3d9VertexInfo.outputElementSize > std::numeric_limits<unsigned int>::max() / elementCount)
    {
        return gl::Error(GL_OUT_OF_MEMORY, "New vertex buffer size would result in an overflow.");
    }

    return static_cast<unsigned int>(d3d9VertexInfo.outputElementSize) * elementCount;
}

void Renderer9::generateCaps(gl::Caps *outCaps,
                             gl::TextureCapsMap *outTextureCaps,
                             gl::Extensions *outExtensions,
                             gl::Limitations *outLimitations) const
{
    d3d9_gl::GenerateCaps(mD3d9, mDevice, mDeviceType, mAdapter, outCaps, outTextureCaps,
                          outExtensions, outLimitations);
}

WorkaroundsD3D Renderer9::generateWorkarounds() const
{
    return d3d9::GenerateWorkarounds();
}

void Renderer9::createAnnotator()
{
    mAnnotator = new DebugAnnotator9();
}

gl::Error Renderer9::clearTextures(gl::SamplerType samplerType, size_t rangeStart, size_t rangeEnd)
{
    // TODO(jmadill): faster way?
    for (size_t samplerIndex = rangeStart; samplerIndex < rangeEnd; samplerIndex++)
    {
        gl::Error error = setTexture(samplerType, static_cast<int>(samplerIndex), nullptr);
        if (error.isError())
        {
            return error;
        }
    }

    return gl::Error(GL_NO_ERROR);
}

egl::Error Renderer9::getEGLDevice(DeviceImpl **device)
{
    if (mEGLDevice == nullptr)
    {
        ASSERT(mDevice != nullptr);
        mEGLDevice       = new DeviceD3D();
        egl::Error error = mEGLDevice->initialize(reinterpret_cast<void *>(mDevice),
                                                  EGL_D3D9_DEVICE_ANGLE, EGL_FALSE);

        if (error.isError())
        {
            SafeDelete(mEGLDevice);
            return error;
        }
    }

    *device = static_cast<DeviceImpl *>(mEGLDevice);
    return egl::Error(EGL_SUCCESS);
}

Renderer9::CurSamplerState::CurSamplerState()
    : forceSet(true),
      baseLevel(std::numeric_limits<size_t>::max()),
      samplerState()
{
}

}