urho3d/Engine/Graphics/Graphics.cpp

//
// Urho3D Engine
// Copyright (c) 2008-2011 Lasse Öörni
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//

#include "Precompiled.h"
#include "AnimatedModel.h"
#include "Animation.h"
#include "AnimationController.h"
#include "Camera.h"
#include "Context.h"
#include "DebugRenderer.h"
#include "Geometry.h"
#include "Graphics.h"
#include "GraphicsEvents.h"
#include "GraphicsImpl.h"
#include "IndexBuffer.h"
#include "Light.h"
#include "Log.h"
#include "Material.h"
#include "Octree.h"
#include "ParticleEmitter.h"
#include "Profiler.h"
#include "Shader.h"
#include "ShaderVariation.h"
#include "Skybox.h"
#include "Technique.h"
#include "Texture2D.h"
#include "TextureCube.h"
#include "VertexBuffer.h"
#include "VertexDeclaration.h"
#include "Zone.h"

#include "DebugNew.h"

#ifdef _MSC_VER
#pragma warning(disable:4355)
#endif

static const D3DCMPFUNC d3dCmpFunc[] =
{
    D3DCMP_ALWAYS,
    D3DCMP_EQUAL,
    D3DCMP_NOTEQUAL,
    D3DCMP_LESS,
    D3DCMP_LESSEQUAL,
    D3DCMP_GREATER,
    D3DCMP_GREATEREQUAL
};

static const D3DTEXTUREFILTERTYPE d3dMinMagFilter[] =
{
    D3DTEXF_POINT,
    D3DTEXF_LINEAR,
    D3DTEXF_LINEAR,
    D3DTEXF_ANISOTROPIC
};

static const D3DTEXTUREFILTERTYPE d3dMipFilter[] =
{
    D3DTEXF_POINT,
    D3DTEXF_POINT,
    D3DTEXF_LINEAR,
    D3DTEXF_ANISOTROPIC
};

static const D3DTEXTUREADDRESS d3dAddressMode[] =
{
    D3DTADDRESS_WRAP,
    D3DTADDRESS_MIRROR,
    D3DTADDRESS_CLAMP,
    D3DTADDRESS_BORDER
};

static const DWORD d3dBlendEnable[] =
{
    FALSE,
    TRUE,
    TRUE,
    TRUE,
    TRUE,
    TRUE,
    TRUE
};

static const D3DBLEND d3dSrcBlend[] =
{
    D3DBLEND_ONE,
    D3DBLEND_ONE,
    D3DBLEND_DESTCOLOR,
    D3DBLEND_SRCALPHA,
    D3DBLEND_SRCALPHA,
    D3DBLEND_ONE,
    D3DBLEND_INVDESTALPHA,
};

static const D3DBLEND d3dDestBlend[] =
{
    D3DBLEND_ZERO,
    D3DBLEND_ONE,
    D3DBLEND_ZERO,
    D3DBLEND_INVSRCALPHA,
    D3DBLEND_ONE,
    D3DBLEND_INVSRCALPHA,
    D3DBLEND_DESTALPHA
};

static const D3DCULL d3dCullMode[] =
{
    D3DCULL_NONE,
    D3DCULL_CCW,
    D3DCULL_CW
};

static const D3DFILLMODE d3dFillMode[] =
{
    D3DFILL_SOLID,
    D3DFILL_WIREFRAME
};

static const D3DSTENCILOP d3dStencilOp[] =
{
    D3DSTENCILOP_KEEP,
    D3DSTENCILOP_ZERO,
    D3DSTENCILOP_REPLACE,
    D3DSTENCILOP_INCR,
    D3DSTENCILOP_DECR
};

static const String noParameter;
static const DWORD windowStyle = WS_OVERLAPPEDWINDOW & ~WS_THICKFRAME & ~WS_MAXIMIZEBOX;

static LRESULT CALLBACK wndProc(HWND wnd, UINT msg, WPARAM wParam, LPARAM lParam);

OBJECTTYPESTATIC(Graphics);

Graphics::Graphics(Context* context) :
    Object(context),
    impl_(new GraphicsImpl()),
    mode_(RENDER_FORWARD),
    width_(0),
    height_(0),
    multiSample_(0),
    windowPosX_(0),
    windowPosY_(0),
    fullscreen_(false),
    vsync_(false),
    flushGPU_(true),
    deviceLost_(false),
    queryIssued_(false),
    deferredSupport_(false),
    prepassSupport_(false),
    hardwareShadowSupport_(false),
    hiresShadowSupport_(false),
    streamOffsetSupport_(false),
    hasSM3_(false),
    forceSM2_(false),
    numPrimitives_(0),
    numBatches_(0),
    immediateBuffer_(0),
    defaultTextureFilterMode_(FILTER_BILINEAR)
{
    ResetCachedState();
    InitializeShaderParameters();
    
    SubscribeToEvent(E_WINDOWMESSAGE, HANDLER(Graphics, HandleWindowMessage));
}

Graphics::~Graphics()
{
    // Release all GPU objects that still exist
    for (Vector<GPUObject*>::Iterator i = gpuObjects_.Begin(); i != gpuObjects_.End(); ++i)
        (*i)->Release();
    gpuObjects_.Clear();
    
    vertexDeclarations_.Clear();
    
    if (impl_->frameQuery_)
    {
        impl_->frameQuery_->Release();
        impl_->frameQuery_ = 0;
    }
    if (impl_->defaultColorSurface_)
    {
        impl_->defaultColorSurface_->Release();
        impl_->defaultColorSurface_ = 0;
    }
    if (impl_->defaultDepthStencilSurface_)
    {
        impl_->defaultDepthStencilSurface_->Release();
        impl_->defaultDepthStencilSurface_ = 0;
    }
    if (impl_->device_)
    {
        impl_->device_->Release();
        impl_->device_ = 0;
    }
    if (impl_->interface_)
    {
        impl_->interface_->Release();
        impl_->interface_ = 0;
    }
    if (impl_->window_)
    {
        DestroyWindow(impl_->window_);
        impl_->window_ = 0;
    }
    
    delete impl_;
    impl_ = 0;
}

void Graphics::MessagePump()
{
    MSG msg;
    
    while (PeekMessage(&msg, 0, 0, 0, PM_REMOVE))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
}

void Graphics::SetWindowTitle(const String& windowTitle)
{
    windowTitle_ = windowTitle;
    if (impl_->window_)
        SetWindowText(impl_->window_, windowTitle_.CString());
}

bool Graphics::SetMode(RenderMode mode, int width, int height, bool fullscreen, bool vsync, int multiSample)
{
    PROFILE(SetScreenMode);
    
    // Find out the full screen mode display format (match desktop color depth)
    D3DFORMAT fullscreenFormat = impl_->GetDesktopFormat();
    
    // If zero dimensions, use the desktop default
    if ((width <= 0) || (height <= 0))
    {
        if (fullscreen)
        {
            IntVector2 desktopResolution = impl_->GetDesktopResolution();
            width = desktopResolution.x_;
            height = desktopResolution.y_;
        }
        else
        {
            width = 800;
            height = 600;
        }
    }
    
    if ((mode == mode_) && (width == width_) && (height == height_) && (fullscreen == fullscreen_) && (vsync == vsync_)
        && (multiSample == multiSample_))
        return true;
    
    if (!impl_->window_)
    {
        if (!OpenWindow(width, height))
            return false;
    }
    
    if (!impl_->interface_)
    {
        if (!CreateInterface())
            return false;
    }
    
    // Disable deferred / light prepass rendering if not supported
    // Note: we do not fall back from deferred to light prepass, because there might not be shaders / materials
    // defined for it. Instead fall back directly to forward rendering
    if ((mode == RENDER_DEFERRED) && (!deferredSupport_))
        mode = RENDER_FORWARD;
    if ((mode == RENDER_PREPASS) && (!prepassSupport_))
        mode = RENDER_FORWARD;
    
    if (multiSample >= (int)D3DMULTISAMPLE_2_SAMPLES)
        multiSample = Clamp(multiSample, (int)D3DMULTISAMPLE_NONE, (int)D3DMULTISAMPLE_16_SAMPLES);
    else
        multiSample = 0;
    // Note: GetMultiSample() will not reflect the actual hardware multisample mode, but rather what the caller wanted.
    // In deferred or light prepass mode, it is used to control the edge filter
    multiSample_ = multiSample;
    if (mode != RENDER_FORWARD)
        multiSample = 0;
    
    // Check fullscreen mode validity. If not valid, revert to windowed
    if (fullscreen)
    {
        PODVector<IntVector2> resolutions = GetResolutions();
        fullscreen = false;
        for (unsigned i = 0; i < resolutions.Size(); ++i)
        {
            if ((width == resolutions[i].x_) && (height == resolutions[i].y_))
            {
                fullscreen = true;
                break;
            }
        }
    }
    
    // Fall back to non-multisampled if unsupported multisampling mode
    if (multiSample)
    {
        if (FAILED(impl_->interface_->CheckDeviceMultiSampleType(impl_->adapter_, impl_->deviceType_, fullscreenFormat, FALSE,
            (D3DMULTISAMPLE_TYPE)multiSample, NULL)))
            multiSample = 0;
    }
    
    // Save window placement if currently windowed
    if (!fullscreen_)
    {
        WINDOWPLACEMENT wndpl;
        wndpl.length = sizeof wndpl;
        if (SUCCEEDED(GetWindowPlacement(impl_->window_, &wndpl)))
        {
            windowPosX_ = wndpl.rcNormalPosition.left;
            windowPosY_ = wndpl.rcNormalPosition.top;
        }
    }
    
    if (fullscreen)
    {
        impl_->presentParams_.BackBufferFormat = fullscreenFormat;
        impl_->presentParams_.Windowed         = false;
    }
    else
    {
        impl_->presentParams_.BackBufferFormat = D3DFMT_UNKNOWN;
        impl_->presentParams_.Windowed         = true;
    }
    
    impl_->presentParams_.BackBufferWidth            = width;
    impl_->presentParams_.BackBufferHeight           = height;
    impl_->presentParams_.BackBufferCount            = 1;
    impl_->presentParams_.MultiSampleType            = (D3DMULTISAMPLE_TYPE)multiSample;
    impl_->presentParams_.MultiSampleQuality         = 0;
    impl_->presentParams_.SwapEffect                 = D3DSWAPEFFECT_DISCARD;
    impl_->presentParams_.hDeviceWindow              = impl_->window_;
    impl_->presentParams_.EnableAutoDepthStencil     = true;
    impl_->presentParams_.AutoDepthStencilFormat     = D3DFMT_D24S8;
    impl_->presentParams_.Flags                      = 0;
    impl_->presentParams_.FullScreen_RefreshRateInHz = D3DPRESENT_RATE_DEFAULT;

    if (vsync)
        impl_->presentParams_.PresentationInterval = D3DPRESENT_INTERVAL_ONE;
    else
        impl_->presentParams_.PresentationInterval = D3DPRESENT_INTERVAL_IMMEDIATE;
    
    width_ = width;
    height_ = height;
    fullscreen_ = fullscreen;
    vsync_ = vsync;
    mode_ = mode;
    
    if (!impl_->device_)
    {
        unsigned adapter = D3DADAPTER_DEFAULT;
        unsigned deviceType = D3DDEVTYPE_HAL;
        
        // Check for PerfHUD adapter
        for (unsigned i=0; i < impl_->interface_->GetAdapterCount(); ++i)
        {
            D3DADAPTER_IDENTIFIER9 identifier;
            impl_->interface_->GetAdapterIdentifier(i, 0, &identifier);
            if (strstr(identifier.Description, "PerfHUD") != 0)
            {
                adapter = i;
                deviceType = D3DDEVTYPE_REF;
                break;
            }
        }
        
        impl_->interface_->GetAdapterIdentifier(adapter, 0, &impl_->adapterIdentifier_);
        if (!CreateDevice(adapter, deviceType))
            return false;
    }
    else
        ResetDevice();
    
    // Adjust window style/size now
    if (fullscreen)
    {
        SetWindowLongPtr(impl_->window_, GWL_STYLE, WS_POPUP);
        SetWindowPos(impl_->window_, HWND_TOP, 0, 0, width, height, SWP_NOZORDER | SWP_SHOWWINDOW);
    }
    else
    {
        RECT rect = {0, 0, width, height};
        AdjustWindowRect(&rect, windowStyle, false);
        SetWindowLongPtr(impl_->window_, GWL_STYLE, windowStyle);
        SetWindowPos(impl_->window_, HWND_TOP, windowPosX_, windowPosY_, rect.right - rect.left, rect.bottom - rect.top,
            SWP_NOZORDER | SWP_SHOWWINDOW);
        
        // Clean up the desktop of the old window contents
        InvalidateRect(0, 0, true);
    }
    
    if (!multiSample)
        LOGINFO("Set screen mode " + String(width_) + "x" + String(height_) + " " + (fullscreen_ ? "fullscreen" : "windowed"));
    else
        LOGINFO("Set screen mode " + String(width_) + "x" + String(height_) + " " + (fullscreen_ ? "fullscreen" : "windowed") +
        " multisample " + String(multiSample));
    
    using namespace ScreenMode;
    
    VariantMap eventData;
    eventData[P_WIDTH] = width_;
    eventData[P_HEIGHT] = height_;
    eventData[P_FULLSCREEN] = fullscreen_;
    SendEvent(E_SCREENMODE, eventData);
    
    return true;
}

bool Graphics::SetMode(int width, int height)
{
    return SetMode(mode_, width, height, fullscreen_, vsync_, multiSample_);
}

bool Graphics::SetMode(RenderMode mode)
{
    return SetMode(mode, width_, height_, fullscreen_, vsync_, multiSample_);
}

bool Graphics::ToggleFullscreen()
{
    return SetMode(mode_, width_, height_, !fullscreen_, vsync_, multiSample_);
}

void Graphics::Close()
{
    if (impl_->window_)
    {
        diffBuffer_.Reset();
        normalBuffer_.Reset();
        depthBuffer_.Reset();
        immediatevertexBuffer_.Clear();
        
        DestroyWindow(impl_->window_);
        impl_->window_ = 0;
    }
}

bool Graphics::TakeScreenShot(Image& destImage)
{
    PROFILE(TakeScreenShot);
    
    if (!impl_->device_)
        return false;
    
    D3DSURFACE_DESC surfaceDesc;
    impl_->defaultColorSurface_->GetDesc(&surfaceDesc);
    
    // If possible, get the backbuffer data, because it is a lot faster.
    // However, if we are multisampled, need to use the front buffer
    bool useBackBuffer = true;
    if (impl_->presentParams_.MultiSampleType)
    {
        useBackBuffer = false;
        surfaceDesc.Format = D3DFMT_A8R8G8B8;
    }
    
    IDirect3DSurface9* surface = 0;
    impl_->device_->CreateOffscreenPlainSurface(width_, height_, surfaceDesc.Format, D3DPOOL_SYSTEMMEM, &surface, 0);
    if (!surface)
        return false;
    
    if (useBackBuffer)
        impl_->device_->GetRenderTargetData(impl_->defaultColorSurface_, surface);
    else
        impl_->device_->GetFrontBufferData(0, surface);
    
    D3DLOCKED_RECT lockedRect;
    lockedRect.pBits = 0;
    surface->LockRect(&lockedRect, 0, D3DLOCK_NOSYSLOCK | D3DLOCK_READONLY);
    if (!lockedRect.pBits)
    {
        surface->Release();
        return false;
    }
    
    destImage.SetSize(width_, height_, 3);
    unsigned char* destData = destImage.GetData();
    
    if (surfaceDesc.Format == D3DFMT_R5G6B5)
    {
        for (int y = 0; y < height_; ++y)
        {
            unsigned short* src = (unsigned short*)((unsigned char*)lockedRect.pBits + y * lockedRect.Pitch);
            unsigned char* dest = destData + y * width_ * 3;
            
            for (int x = 0; x < width_; ++x)
            {
                unsigned short rgb = *src++;
                int b = rgb & 31;
                int g = (rgb >> 5) & 63;
                int r = (rgb >> 11);
                
                *dest++ = (int)(r * 255.0f / 31.0f);
                *dest++ = (int)(g * 255.0f / 63.0f);
                *dest++ = (int)(b * 255.0f / 31.0f);
            }
        }
    }
    else
    {
        for (int y = 0; y < height_; ++y)
        {
            unsigned char* src = (unsigned char*)lockedRect.pBits + y * lockedRect.Pitch;
            unsigned char* dest = destData + y * width_ * 3;
            
            for (int x = 0; x < width_; ++x)
            {
                *dest++ = src[2];
                *dest++ = src[1];
                *dest++ = src[0];
                src += 4;
            }
        }
    }
    
    surface->UnlockRect();
    surface->Release();
    
    return true;
}

void Graphics::SetFlushGPU(bool enable)
{
    flushGPU_ = enable;
}

bool Graphics::BeginFrame()
{
    PROFILE(BeginRendering);
    
    if (!IsInitialized())
        return false;
    
    // Check for lost device before rendering
    HRESULT hr = impl_->device_->TestCooperativeLevel();
    if (hr != D3D_OK)
    {
        deviceLost_ = true;
        
        // The device can not be reset yet, sleep and try again eventually
        if (hr == D3DERR_DEVICELOST)
        {
            Sleep(20);
            return false;
        }
        // The device is lost, but ready to be reset. Reset device but do not render on this frame yet
        if (hr == D3DERR_DEVICENOTRESET)
        {
            ResetDevice();
            return false;
        }
    }
    
    impl_->device_->BeginScene();
    
    // If a query was issued on the previous frame, wait for it to finish before beginning the next
    if ((impl_->frameQuery_) && (queryIssued_))
    {
        while (impl_->frameQuery_->GetData(0, 0, D3DGETDATA_FLUSH) == S_FALSE)
        {
        }
        
        queryIssued_ = false;
    }
    
    // Set default rendertarget and depth buffer
    ResetRenderTargets();
    viewTexture_ = 0;
    
    // Cleanup textures from previous frame
    for (unsigned i = 0; i < MAX_TEXTURE_UNITS; ++i)
        SetTexture(i, 0);
    
    // Cleanup stream frequencies from previous frame
    ResetStreamFrequencies();
    
    // Reset immediate mode vertex buffer positions
    for (Map<unsigned, unsigned>::Iterator i = immediateVertexBufferPos_.Begin(); i != immediateVertexBufferPos_.End(); ++i)
        i->second_ = 0;
    
    numPrimitives_ = 0;
    numBatches_ = 0;
    
    SendEvent(E_BEGINRENDER);
    
    return true;
}

void Graphics::EndFrame()
{
    PROFILE(EndRendering);
    
    if (!IsInitialized())
        return;
    
    SendEvent(E_ENDRENDER);
    
    // Optionally flush GPU buffer to avoid control lag or framerate fluctuations due to pre-render
    if ((impl_->frameQuery_) && (flushGPU_))
    {
        impl_->frameQuery_->Issue(D3DISSUE_END);
        queryIssued_ = true;
    }
    
    {
        impl_->device_->EndScene();
        impl_->device_->Present(0, 0, 0, 0);
    }
}

void Graphics::Clear(unsigned flags, const Color& color, float depth, unsigned stencil)
{
    DWORD d3dFlags = 0;
    if (flags & CLEAR_COLOR)
        d3dFlags |= D3DCLEAR_TARGET;
    if (flags & CLEAR_DEPTH)
        d3dFlags |= D3DCLEAR_ZBUFFER;
    if (flags & CLEAR_STENCIL)
        d3dFlags |= D3DCLEAR_STENCIL;

    impl_->device_->Clear(0, 0, d3dFlags, color.ToUInt(), depth, stencil);
}


void Graphics::Draw(PrimitiveType type, unsigned vertexStart, unsigned vertexCount)
{
    if (!vertexCount)
        return;
    
    ResetStreamFrequencies();
    
    unsigned primitiveCount = 0;
    
    switch (type)
    {
    case TRIANGLE_LIST:
        primitiveCount = vertexCount / 3;
        impl_->device_->DrawPrimitive(D3DPT_TRIANGLELIST, vertexStart, primitiveCount);
        break;
        
    case LINE_LIST:
        primitiveCount = vertexCount / 2;
        impl_->device_->DrawPrimitive(D3DPT_LINELIST, vertexStart, primitiveCount);
        break;
    }
    
    numPrimitives_ += primitiveCount;
    ++numBatches_;
}

void Graphics::Draw(PrimitiveType type, unsigned indexStart, unsigned indexCount, unsigned minVertex, unsigned vertexCount)
{
    if (!indexCount)
        return;
    
    ResetStreamFrequencies();
    
    unsigned primitiveCount = 0;
    
    switch (type)
    {
    case TRIANGLE_LIST:
        primitiveCount = indexCount / 3;
        impl_->device_->DrawIndexedPrimitive(D3DPT_TRIANGLELIST, 0, minVertex, vertexCount, indexStart, primitiveCount);
        break;
        
    case LINE_LIST:
        primitiveCount = indexCount / 2;
        impl_->device_->DrawIndexedPrimitive(D3DPT_LINELIST, 0, minVertex, vertexCount, indexStart, primitiveCount);
        break;
    }
    
    numPrimitives_ += primitiveCount;
    ++numBatches_;
}

void Graphics::DrawInstanced(PrimitiveType type, unsigned indexStart, unsigned indexCount, unsigned minVertex, unsigned vertexCount,
    unsigned instanceCount)
{
    if ((!indexCount) || (!instanceCount))
        return;
    
    for (unsigned i = 0; i < MAX_VERTEX_STREAMS; ++i)
    {
        VertexBuffer* buffer = vertexBuffer_[i];
        if (buffer)
        {
            if (buffer->GetElementMask() & MASK_INSTANCEMATRIX1)
                SetStreamFrequency(i, D3DSTREAMSOURCE_INSTANCEDATA | 1);
            else
                SetStreamFrequency(i, D3DSTREAMSOURCE_INDEXEDDATA | instanceCount);
        }
    }
    
    unsigned primitiveCount = 0;
    
    switch (type)
    {
    case TRIANGLE_LIST:
        primitiveCount = indexCount / 3;
        impl_->device_->DrawIndexedPrimitive(D3DPT_TRIANGLELIST, 0, minVertex, vertexCount, indexStart, primitiveCount);
        break;
        
    case LINE_LIST:
        primitiveCount = indexCount / 2;
        impl_->device_->DrawIndexedPrimitive(D3DPT_LINELIST, 0, minVertex, vertexCount, indexStart, primitiveCount);
        break;
    }
    
    numPrimitives_ += instanceCount * primitiveCount;
    ++numBatches_;
}

void Graphics::SetVertexBuffer(VertexBuffer* buffer)
{
    Vector<VertexBuffer*> vertexBuffers(1);
    PODVector<unsigned> elementMasks(1);
    vertexBuffers[0] = buffer;
    elementMasks[0] = MASK_DEFAULT;
    SetVertexBuffers(vertexBuffers, elementMasks);
}

bool Graphics::SetVertexBuffers(const Vector<VertexBuffer*>& buffers, const PODVector<unsigned>& elementMasks,
    unsigned instanceOffset)
{
    if (buffers.Size() > MAX_VERTEX_STREAMS)
    {
        LOGERROR("Too many vertex buffers");
        return false;
    }
    if (buffers.Size() != elementMasks.Size())
    {
        LOGERROR("Amount of element masks and vertex buffers does not match");
        return false;
    }
    
    // Build vertex declaration hash code out of the buffers & masks
    unsigned long long hash = 0;
    for (unsigned i = 0; i < buffers.Size(); ++i)
    {
        if (!buffers[i])
            continue;
        
        hash |= buffers[i]->GetHash(i, elementMasks[i]);
    }
    
    if (hash)
    {
        // If no previous vertex declaration for that hash, create new
        if (vertexDeclarations_.Find(hash) == vertexDeclarations_.End())
        {
            SharedPtr<VertexDeclaration> newDeclaration(new VertexDeclaration(this, buffers, elementMasks));
            if (!newDeclaration->GetDeclaration())
            {
                LOGERROR("Failed to create vertex declaration");
                return false;
            }
            
            vertexDeclarations_[hash] = newDeclaration;
        }
        
        VertexDeclaration* declaration = vertexDeclarations_[hash];
        if (declaration != vertexDeclaration_)
        {
            impl_->device_->SetVertexDeclaration(declaration->GetDeclaration());
            vertexDeclaration_ = declaration;
        }
    }
    
    for (unsigned i = 0; i < MAX_VERTEX_STREAMS; ++i)
    {
        VertexBuffer* buffer = 0;
        unsigned offset = 0;
        
        if (i < buffers.Size())
        {
            buffer = buffers[i];
            if ((buffer) && (buffer->GetElementMask() & MASK_INSTANCEMATRIX1))
                offset = instanceOffset * buffer->GetVertexSize();
        }
        
        if ((buffer != vertexBuffer_[i]) || (offset != streamOffset_[i]))
        {
            if (buffer)
                impl_->device_->SetStreamSource(i, (IDirect3DVertexBuffer9*)buffer->GetGPUObject(), offset, buffer->GetVertexSize());
            else
                impl_->device_->SetStreamSource(i, 0, 0, 0);
            
            vertexBuffer_[i] = buffer;
            streamOffset_[i] = offset;
        }
    }
    
    return true;
}

bool Graphics::SetVertexBuffers(const Vector<SharedPtr<VertexBuffer> >& buffers, const PODVector<unsigned>&
    elementMasks, unsigned instanceOffset)
{
   if (buffers.Size() > MAX_VERTEX_STREAMS)
    {
        LOGERROR("Too many vertex buffers");
        return false;
    }
    if (buffers.Size() != elementMasks.Size())
    {
        LOGERROR("Amount of element masks and vertex buffers does not match");
        return false;
    }
    
    // Build vertex declaration hash code out of the buffers & masks
    unsigned long long hash = 0;
    for (unsigned i = 0; i < buffers.Size(); ++i)
    {
        if (!buffers[i])
            continue;
        
        hash |= buffers[i]->GetHash(i, elementMasks[i]);
    }
    
    if (hash)
    {
        // If no previous vertex declaration for that hash, create new
        if (vertexDeclarations_.Find(hash) == vertexDeclarations_.End())
        {
            SharedPtr<VertexDeclaration> newDeclaration(new VertexDeclaration(this, buffers, elementMasks));
            if (!newDeclaration->GetDeclaration())
            {
                LOGERROR("Failed to create vertex declaration");
                return false;
            }
            
            vertexDeclarations_[hash] = newDeclaration;
        }
        
        VertexDeclaration* declaration = vertexDeclarations_[hash];
        if (declaration != vertexDeclaration_)
        {
            impl_->device_->SetVertexDeclaration(declaration->GetDeclaration());
            vertexDeclaration_ = declaration;
        }
    }
    
    for (unsigned i = 0; i < MAX_VERTEX_STREAMS; ++i)
    {
        VertexBuffer* buffer = 0;
        unsigned offset = 0;
        
        if (i < buffers.Size())
        {
            buffer = buffers[i];
            if ((buffer) && (buffer->GetElementMask() & MASK_INSTANCEMATRIX1))
                offset = instanceOffset * buffer->GetVertexSize();
        }
        
        if ((buffer != vertexBuffer_[i]) || (offset != streamOffset_[i]))
        {
            if (buffer)
                impl_->device_->SetStreamSource(i, (IDirect3DVertexBuffer9*)buffer->GetGPUObject(), offset, buffer->GetVertexSize());
            else
                impl_->device_->SetStreamSource(i, 0, 0, 0);
            
            vertexBuffer_[i] = buffer;
            streamOffset_[i] = offset;
        }
    }
    
    return true;
}

void Graphics::SetIndexBuffer(IndexBuffer* buffer)
{
    if (buffer != indexBuffer_)
    {
        if (buffer)
            impl_->device_->SetIndices((IDirect3DIndexBuffer9*)buffer->GetGPUObject());
        else
            impl_->device_->SetIndices(0);
            
        indexBuffer_ = buffer;
    }
}

void Graphics::SetShaders(ShaderVariation* vs, ShaderVariation* ps)
{
    if (vs != vertexShader_)
    {
        if ((vs) && (vs->GetShaderType() == VS))
            impl_->device_->SetVertexShader((IDirect3DVertexShader9*)vs->GetGPUObject());
        else
            impl_->device_->SetVertexShader(0);
            
        vertexShader_ = vs;
    }
    
    if (ps != pixelShader_)
    {
        if ((ps) && (ps->GetShaderType() == PS))
            impl_->device_->SetPixelShader((IDirect3DPixelShader9*)ps->GetGPUObject());
        else
            impl_->device_->SetPixelShader(0);
        
        pixelShader_ = ps;
    }
}

void Graphics::SetShaderParameter(ShaderParameter param, const bool* data, unsigned count)
{
    unsigned index = shaderRegisters_[param];
    if (index >= MAX_CONSTANT_REGISTERS)
        return;
    
    if (param < PSP_AMBIENTCOLOR)
       impl_->device_->SetVertexShaderConstantB(index, (const BOOL*)data, count);
    else
       impl_->device_->SetPixelShaderConstantB(index, (const BOOL*)data, count);
}

void Graphics::SetShaderParameter(ShaderParameter param, const float* data, unsigned count)
{
    unsigned index = shaderRegisters_[param];
    if (index >= MAX_CONSTANT_REGISTERS)
        return;
    
    if (param < PSP_AMBIENTCOLOR)
        impl_->device_->SetVertexShaderConstantF(index, data, count / 4);
    else
        impl_->device_->SetPixelShaderConstantF(index, data, count / 4);
}

void Graphics::SetShaderParameter(ShaderParameter param, const int* data, unsigned count)
{
    unsigned index = shaderRegisters_[param];
    if (index >= MAX_CONSTANT_REGISTERS)
        return;
    
    if (param < PSP_AMBIENTCOLOR)
        impl_->device_->SetVertexShaderConstantI(index, data, count / 4);
    else
        impl_->device_->SetPixelShaderConstantI(index, data, count / 4);
}

void Graphics::SetShaderParameter(ShaderParameter param, float value)
{
    unsigned index = shaderRegisters_[param];
    if (index >= MAX_CONSTANT_REGISTERS)
        return;
    
    float data[4];
    
    data[0] = value;
    data[1] = 0.0f;
    data[2] = 0.0f;
    data[3] = 0.0f;
    
    if (param < PSP_AMBIENTCOLOR)
        impl_->device_->SetVertexShaderConstantF(index, &data[0], 1);
    else
        impl_->device_->SetPixelShaderConstantF(index, &data[0], 1);
}

void Graphics::SetShaderParameter(ShaderParameter param, const Color& color)
{
    unsigned index = shaderRegisters_[param];
    if (index >= MAX_CONSTANT_REGISTERS)
        return;
    
    if (param < PSP_AMBIENTCOLOR)
        impl_->device_->SetVertexShaderConstantF(index, color.GetData(), 1);
    else
        impl_->device_->SetPixelShaderConstantF(index, color.GetData(), 1);
}

void Graphics::SetShaderParameter(ShaderParameter param, const Matrix3& matrix)
{
    unsigned index = shaderRegisters_[param];
    if (index >= MAX_CONSTANT_REGISTERS)
        return;
    
    float data[12];
    
    data[0] = matrix.m00_;
    data[1] = matrix.m01_;
    data[2] = matrix.m02_;
    data[3] = 0.0f;
    data[4] = matrix.m10_;
    data[5] = matrix.m11_;
    data[6] = matrix.m12_;
    data[7] = 0.0f;
    data[8] = matrix.m20_;
    data[9] = matrix.m21_;
    data[10] = matrix.m22_;
    data[11] = 0.0f;
    
    if (param < PSP_AMBIENTCOLOR)
        impl_->device_->SetVertexShaderConstantF(index, &data[0], 3);
    else
        impl_->device_->SetPixelShaderConstantF(index, &data[0], 3);
}

void Graphics::SetShaderParameter(ShaderParameter param, const Vector3& vector)
{
    unsigned index = shaderRegisters_[param];
    if (index >= MAX_CONSTANT_REGISTERS)
        return;
    
    float data[4];
    
    data[0] = vector.x_;
    data[1] = vector.y_;
    data[2] = vector.z_;
    data[3] = 0.0f;
    
    if (param < PSP_AMBIENTCOLOR)
        impl_->device_->SetVertexShaderConstantF(index, &data[0], 1);
    else
        impl_->device_->SetPixelShaderConstantF(index, &data[0], 1);
}

void Graphics::SetShaderParameter(ShaderParameter param, const Matrix4& matrix)
{
    unsigned index = shaderRegisters_[param];
    if (index >= MAX_CONSTANT_REGISTERS)
        return;
    
    if (param < PSP_AMBIENTCOLOR)
        impl_->device_->SetVertexShaderConstantF(index, matrix.GetData(), 4);
    else
        impl_->device_->SetPixelShaderConstantF(index, matrix.GetData(), 4);
}

void Graphics::SetShaderParameter(ShaderParameter param, const Vector4& vector)
{
    unsigned index = shaderRegisters_[param];
    if (index >= MAX_CONSTANT_REGISTERS)
        return;
    
    if (param < PSP_AMBIENTCOLOR)
        impl_->device_->SetVertexShaderConstantF(index, vector.GetData(), 1);
    else
        impl_->device_->SetPixelShaderConstantF(index, vector.GetData(), 1);
}

void Graphics::SetShaderParameter(ShaderParameter param, const Matrix3x4& matrix)
{
    unsigned index = shaderRegisters_[param];
    if (index >= MAX_CONSTANT_REGISTERS)
        return;
    
    if (param < PSP_AMBIENTCOLOR)
        impl_->device_->SetVertexShaderConstantF(index, matrix.GetData(), 3);
    else
        impl_->device_->SetPixelShaderConstantF(index, matrix.GetData(), 3);
}

bool Graphics::NeedParameterUpdate(ShaderParameter parameter, const void* source)
{
    if (parameter < PSP_AMBIENTCOLOR)
    {
        if ((vertexShader_) && (vertexShader_->HasParameter(parameter)) && (lastShaderParameterSources_[parameter] != source))
        {
            lastShaderParameterSources_[parameter] = source;
            return true;
        }
    }
    else
    {
        if ((pixelShader_) && (pixelShader_->HasParameter(parameter)) && (lastShaderParameterSources_[parameter] != source))
        {
            lastShaderParameterSources_[parameter] = source;
            return true;
        }
    }
    
    return false;
}

bool Graphics::NeedTextureUnit(TextureUnit unit)
{
    return (pixelShader_) && (pixelShader_->HasTextureUnit(unit));
}

void Graphics::ClearLastParameterSources()
{
    for (unsigned i = 0; i < MAX_SHADER_PARAMETERS; ++i)
        lastShaderParameterSources_[i] = (const void*)M_MAX_UNSIGNED;
}

void Graphics::ClearTransformSources()
{
    lastShaderParameterSources_[VSP_MODEL] = (const void*)M_MAX_UNSIGNED;
    lastShaderParameterSources_[VSP_VIEWPROJ] = (const void*)M_MAX_UNSIGNED;
}

void Graphics::SetTexture(unsigned index, Texture* texture)
{
    if (index >= MAX_TEXTURE_UNITS)
        return;
    
    // Check if texture is currently bound as a render target. In that case, use its backup texture, or blank if not defined
    if (texture)
    {
        if ((renderTarget_[0]) && (renderTarget_[0]->GetParentTexture() == texture))
            texture = texture->GetBackupTexture();
        // Check also for the view texture, in case a specific rendering pass does not bind the destination render target,
        // but should still not sample it either
        else if (texture == viewTexture_)
            texture = texture->GetBackupTexture();
    }
    
    if (texture != texture_[index])
    {
        if (texture)
            impl_->device_->SetTexture(index, (IDirect3DBaseTexture9*)texture->GetGPUObject());
        else
            impl_->device_->SetTexture(index, 0);
        
        texture_[index] = texture;
    }
    
    if (texture)
    {
        TextureFilterMode filterMode = texture->GetFilterMode();
        if (filterMode == FILTER_DEFAULT)
            filterMode = defaultTextureFilterMode_;
        
        D3DTEXTUREFILTERTYPE minMag, mip;
        minMag = d3dMinMagFilter[filterMode];
        if (minMag != impl_->minMagFilter_[index])
        {
            impl_->device_->SetSamplerState(index, D3DSAMP_MAGFILTER, minMag);
            impl_->device_->SetSamplerState(index, D3DSAMP_MINFILTER, minMag);
            impl_->minMagFilter_[index] = minMag;
        }
        mip = d3dMipFilter[filterMode];
        if (mip != impl_->mipFilter_[index])
        {
            impl_->device_->SetSamplerState(index, D3DSAMP_MIPFILTER, mip);
            impl_->mipFilter_[index] = mip;
        }
        D3DTEXTUREADDRESS u, v;
        u = d3dAddressMode[texture->GetAddressMode(COORD_U)];
        if (u != impl_->uAddressMode_[index])
        {
            impl_->device_->SetSamplerState(index, D3DSAMP_ADDRESSU, u);
            impl_->uAddressMode_[index] = u;
        }
        v = d3dAddressMode[texture->GetAddressMode(COORD_V)];
        if (v != impl_->vAddressMode_[index])
        {
            impl_->device_->SetSamplerState(index, D3DSAMP_ADDRESSV, v);
            impl_->vAddressMode_[index] = v;
        }
        if ((u == D3DTADDRESS_BORDER) || (v == D3DTADDRESS_BORDER))
        {
            const Color& borderColor = texture->GetBorderColor();
            if (borderColor != impl_->borderColor_[index])
            {
                impl_->device_->SetSamplerState(index, D3DSAMP_BORDERCOLOR, borderColor.ToUInt());
                impl_->borderColor_[index] = borderColor;
            }
        }
    }
}

void Graphics::SetDefaultTextureFilterMode(TextureFilterMode mode)
{
    defaultTextureFilterMode_ = mode;
}

void Graphics::ResetRenderTargets()
{
    for (unsigned i = 0; i < MAX_RENDERTARGETS; ++i)
        SetRenderTarget(i, (RenderSurface*)0);
    SetDepthStencil((RenderSurface*)0);
    SetViewport(IntRect(0, 0, width_, height_));
}

void Graphics::ResetRenderTarget(unsigned index)
{
    SetRenderTarget(index, (RenderSurface*)0);
}

void Graphics::ResetDepthStencil()
{
    SetDepthStencil((RenderSurface*)0);
}

void Graphics::SetRenderTarget(unsigned index, RenderSurface* renderTarget)
{
    if (index >= MAX_RENDERTARGETS)
        return;
    
    IDirect3DSurface9* newColorSurface = 0;
    
    if (renderTarget)
    {
        if (renderTarget->GetUsage() != TEXTURE_RENDERTARGET)
            return;
        newColorSurface = (IDirect3DSurface9*)renderTarget->GetSurface();
    }
    else
    {
        if (!index)
            newColorSurface = impl_->defaultColorSurface_;
    }
    
    renderTarget_[index] = renderTarget;
    
    if (newColorSurface != impl_->colorSurface_[index])
    {
        impl_->device_->SetRenderTarget(index, newColorSurface);
        impl_->colorSurface_[index] = newColorSurface;
    }
    
    // If the rendertarget is also bound as a texture, replace with backup texture or null
    if (renderTarget)
    {
        Texture* parentTexture = renderTarget->GetParentTexture();
        
        for (unsigned i = 0; i < MAX_TEXTURE_UNITS; ++i)
        {
            if (texture_[i] == parentTexture)
                SetTexture(i, texture_[i]->GetBackupTexture());
        }
    }
    
    if (!index)
    {
        // Viewport has been reset
        IntVector2 rtSize = GetRenderTargetDimensions();
        viewport_ = IntRect(0, 0, rtSize.x_, rtSize.y_);
        
        // Disable scissor test, needs to be re-enabled by the user
        SetScissorTest(false);
    }
}

void Graphics::SetRenderTarget(unsigned index, Texture2D* renderTexture)
{
    RenderSurface* renderTarget = 0;
    if (renderTexture)
        renderTarget = renderTexture->GetRenderSurface();
    
    SetRenderTarget(index, renderTarget);
}

void Graphics::SetDepthStencil(RenderSurface* depthStencil)
{
    IDirect3DSurface9* newDepthStencilSurface = 0;
    if ((depthStencil) && (depthStencil->GetUsage() == TEXTURE_DEPTHSTENCIL))
    {
        newDepthStencilSurface = (IDirect3DSurface9*)depthStencil->GetSurface();
        depthStencil_ = depthStencil;
    }
    if (!newDepthStencilSurface)
    {
        newDepthStencilSurface = impl_->defaultDepthStencilSurface_;
        depthStencil_ = 0;
    }
    if (newDepthStencilSurface != impl_->depthStencilSurface_)
    {
        impl_->device_->SetDepthStencilSurface(newDepthStencilSurface);
        impl_->depthStencilSurface_ = newDepthStencilSurface;
    }
}

void Graphics::SetDepthStencil(Texture2D* depthTexture)
{
    RenderSurface* depthStencil = 0;
    if (depthTexture)
        depthStencil = depthTexture->GetRenderSurface();
    
    SetDepthStencil(depthStencil);
}

void Graphics::SetViewport(const IntRect& rect)
{
    IntVector2 size = GetRenderTargetDimensions();
    
    IntRect rectCopy = rect;
    
    if (rectCopy.right_ <= rectCopy.left_)
        rectCopy.right_ = rectCopy.left_ + 1;
    if (rectCopy.bottom_ <= rectCopy.top_)
        rectCopy.bottom_ = rectCopy.top_ + 1;
    rectCopy.left_ = Clamp(rectCopy.left_, 0, size.x_);
    rectCopy.top_ = Clamp(rectCopy.top_, 0, size.y_);
    rectCopy.right_ = Clamp(rectCopy.right_, 0, size.x_);
    rectCopy.bottom_ = Clamp(rectCopy.bottom_, 0, size.y_);
    
    D3DVIEWPORT9 vp;
    vp.MinZ = 0.0f;
    vp.MaxZ = 1.0f;
    vp.X = rectCopy.left_;
    vp.Y = rectCopy.top_;
    vp.Width = rectCopy.right_ - rectCopy.left_;
    vp.Height = rectCopy.bottom_ - rectCopy.top_;
    
    impl_->device_->SetViewport(&vp);
    viewport_ = rectCopy;
    
    // Disable scissor test, needs to be re-enabled by the user
    SetScissorTest(false);
}

void Graphics::SetViewTexture(Texture* texture)
{
    viewTexture_ = texture;
    
    // Check for the view texture being currently bound
    if (texture)
    {
        for (unsigned i = 0; i < MAX_TEXTURE_UNITS; ++i)
        {
            if (texture_[i] == texture)
                SetTexture(i, texture_[i]->GetBackupTexture());
        }
    }
}

void Graphics::SetAlphaTest(bool enable, CompareMode mode, float alphaRef)
{
    if (enable != alphaTest_)
    {
        impl_->device_->SetRenderState(D3DRS_ALPHATESTENABLE, enable ? TRUE : FALSE);
        alphaTest_ = enable;
    }
    
    if (enable)
    {
        if (mode != alphaTestMode_)
        {
            impl_->device_->SetRenderState(D3DRS_ALPHAFUNC, d3dCmpFunc[mode]);
            alphaTestMode_ = mode;
        }
        
        if (alphaRef < 0.0f)
            alphaRef = 0.0f;
        if (alphaRef > 1.0f) 
            alphaRef = 1.0f;
        
        if (alphaRef != alphaRef_)
        {
            impl_->device_->SetRenderState(D3DRS_ALPHAREF, (DWORD)(alphaRef * 255.0f));
            alphaRef_ = alphaRef;
        }
    }
}

void Graphics::SetTextureAnisotropy(unsigned level)
{
    if (level < 1)
        level = 1;
    
    if (level != textureAnisotropy_)
    {
        for (unsigned i = 0; i < MAX_TEXTURE_UNITS; ++i)
            impl_->device_->SetSamplerState(i, D3DSAMP_MAXANISOTROPY, level);
        
        textureAnisotropy_ = level;
    }
}

void Graphics::SetBlendMode(BlendMode mode)
{
    if (mode != blendMode_)
    {
        if (d3dBlendEnable[mode] != impl_->blendEnable_)
        {
            impl_->device_->SetRenderState(D3DRS_ALPHABLENDENABLE, d3dBlendEnable[mode]);
            impl_->blendEnable_ = d3dBlendEnable[mode];
        }
        
        if (impl_->blendEnable_)
        {
            if (d3dSrcBlend[mode] != impl_->srcBlend_)
            {
                impl_->device_->SetRenderState(D3DRS_SRCBLEND, d3dSrcBlend[mode]);
                impl_->srcBlend_ = d3dSrcBlend[mode];
            }
            if (d3dDestBlend[mode] != impl_->destBlend_)
            {
                impl_->device_->SetRenderState(D3DRS_DESTBLEND, d3dDestBlend[mode]);
                impl_->destBlend_ = d3dDestBlend[mode];
            }
        }
        
        blendMode_ = mode;
    }
}

void Graphics::SetColorWrite(bool enable)
{
    if (enable != colorWrite_)
    {
        impl_->device_->SetRenderState(D3DRS_COLORWRITEENABLE, enable ? D3DCOLORWRITEENABLE_RED |
            D3DCOLORWRITEENABLE_GREEN | D3DCOLORWRITEENABLE_BLUE | D3DCOLORWRITEENABLE_ALPHA : 0);
        colorWrite_ = enable;
    }
}

void Graphics::SetCullMode(CullMode mode)
{
    if (mode != cullMode_)
    {
        impl_->device_->SetRenderState(D3DRS_CULLMODE, d3dCullMode[mode]);
        cullMode_ = mode;
    }
}

void Graphics::SetDepthBias(float constantBias, float slopeScaledBias)
{
    if (constantBias != constantDepthBias_)
    {
        impl_->device_->SetRenderState(D3DRS_DEPTHBIAS, *((DWORD*)&constantBias));
        constantDepthBias_ = constantBias;
    }
    if (slopeScaledBias != slopeScaledDepthBias_)
    {
        impl_->device_->SetRenderState(D3DRS_SLOPESCALEDEPTHBIAS, *((DWORD*)&slopeScaledBias));
        slopeScaledDepthBias_ = slopeScaledBias;
    }
}

void Graphics::SetDepthTest(CompareMode mode)
{
    if (mode != depthTestMode_)
    {
        impl_->device_->SetRenderState(D3DRS_ZFUNC, d3dCmpFunc[mode]);
        depthTestMode_ = mode;
    }
}

void Graphics::SetDepthWrite(bool enable)
{
    if (enable != depthWrite_)
    {
        impl_->device_->SetRenderState(D3DRS_ZWRITEENABLE, enable ? TRUE : FALSE);
        depthWrite_ = enable;
    }
}

void Graphics::SetFillMode(FillMode mode)
{
    if (mode != fillMode_)
    {
        impl_->device_->SetRenderState(D3DRS_FILLMODE, d3dFillMode[mode]);
        fillMode_ = mode;
    }
}

void Graphics::SetScissorTest(bool enable, const Rect& rect, bool borderInclusive)
{
    // During some light rendering loops, a full rect is Toggled on/off repeatedly.
    // Disable scissor in that case to reduce state changes
    if (rect == Rect::FULL)
        enable = false;
    
    // Check for illegal rect, disable in that case
    if ((rect.max_.x_ < rect.min_.x_) || (rect.max_.y_ < rect.min_.y_))
        enable = false;
    
    if (enable)
    {
        IntVector2 rtSize(GetRenderTargetDimensions());
        IntVector2 viewSize(viewport_.right_ - viewport_.left_, viewport_.bottom_ - viewport_.top_);
        IntVector2 viewPos(viewport_.left_, viewport_.top_);
        IntRect intRect;
        int expand = borderInclusive ? 1 : 0;
        
        intRect.left_ = Clamp((int)((rect.min_.x_ + 1.0f) * 0.5f * viewSize.x_) + viewPos.x_, 0, rtSize.x_ - 1);
        intRect.top_ = Clamp((int)((-rect.max_.y_ + 1.0f) * 0.5f * viewSize.y_) + viewPos.y_, 0, rtSize.y_ - 1);
        intRect.right_ = Clamp((int)((rect.max_.x_ + 1.0f) * 0.5f * viewSize.x_) + viewPos.x_ + expand, 0, rtSize.x_);
        intRect.bottom_ = Clamp((int)((-rect.min_.y_ + 1.0f) * 0.5f * viewSize.y_) + viewPos.y_ + expand, 0, rtSize.y_);
        
        if (intRect.right_ == intRect.left_)
            intRect.right_++;
        if (intRect.bottom_ == intRect.top_)
            intRect.bottom_++;
        
        if ((intRect.right_ < intRect.left_) || (intRect.bottom_ < intRect.top_))
            enable = false;
        
        if ((enable) && (scissorRect_ != intRect))
        {
            RECT d3dRect;
            d3dRect.left = intRect.left_;
            d3dRect.top = intRect.top_;
            d3dRect.right = intRect.right_;
            d3dRect.bottom = intRect.bottom_;
            
            impl_->device_->SetScissorRect(&d3dRect);
            scissorRect_ = intRect;
        }
    }
    else
        scissorRect_ = IntRect::ZERO;
    
    if (enable != scissorTest_)
    {
        impl_->device_->SetRenderState(D3DRS_SCISSORTESTENABLE, enable ? TRUE : FALSE);
        scissorTest_ = enable;
    }
}

void Graphics::SetScissorTest(bool enable, const IntRect& rect)
{
    IntVector2 rtSize(GetRenderTargetDimensions());
    IntVector2 viewSize(viewport_.right_ - viewport_.left_, viewport_.bottom_ - viewport_.top_);
    IntVector2 viewPos(viewport_.left_, viewport_.top_);
    
    // Full scissor is same as disabling the test
    if ((rect.left_ <= 0) && (rect.right_ >= viewSize.x_) && (rect.top_ <= 0) && (rect.bottom_ >= viewSize.y_))
        enable = false;
    
    // Check for illegal rect, disable in that case
    if ((rect.right_ < rect.left_) || (rect.bottom_ < rect.top_))
        enable = false;
    
    if (enable)
    {
        IntRect intRect;
        intRect.left_ = Clamp(rect.left_ + viewPos.x_, 0, rtSize.x_ - 1);
        intRect.top_ = Clamp(rect.top_ + viewPos.y_, 0, rtSize.y_ - 1);
        intRect.right_ = Clamp(rect.right_ + viewPos.x_, 0, rtSize.x_);
        intRect.bottom_ = Clamp(rect.bottom_ + viewPos.y_, 0, rtSize.y_);
        
        if (intRect.right_ == intRect.left_)
            intRect.right_++;
        if (intRect.bottom_ == intRect.top_)
            intRect.bottom_++;
        
        if ((intRect.right_ < intRect.left_) || (intRect.bottom_ < intRect.top_))
            enable = false;
        
        if ((enable) && (scissorRect_ != intRect))
        {
            RECT d3dRect;
            d3dRect.left = intRect.left_;
            d3dRect.top = intRect.top_;
            d3dRect.right = intRect.right_;
            d3dRect.bottom = intRect.bottom_;
            
            impl_->device_->SetScissorRect(&d3dRect);
            scissorRect_ = intRect;
        }
    }
    else
        scissorRect_ = IntRect::ZERO;
    
    if (enable != scissorTest_)
    {
        impl_->device_->SetRenderState(D3DRS_SCISSORTESTENABLE, enable ? TRUE : FALSE);
        scissorTest_ = enable;
    }
}

void Graphics::SetStencilTest(bool enable, CompareMode mode, StencilOp pass, StencilOp fail, StencilOp zFail, unsigned stencilRef, unsigned stencilMask)
{
    if (enable != stencilTest_)
    {
        impl_->device_->SetRenderState(D3DRS_STENCILENABLE, enable ? TRUE : FALSE);
        stencilTest_ = enable;
    }
    
    if (enable)
    {
        if (mode != stencilTestMode_)
        {
            impl_->device_->SetRenderState(D3DRS_STENCILFUNC, d3dCmpFunc[mode]);
            stencilTestMode_ = mode;
        }
        if (pass != stencilPass_)
        {
            impl_->device_->SetRenderState(D3DRS_STENCILPASS, d3dStencilOp[pass]);
            stencilPass_ = pass;
        }
        if (fail != stencilFail_)
        {
            impl_->device_->SetRenderState(D3DRS_STENCILFAIL, d3dStencilOp[fail]);
            stencilFail_ = fail;
        }
        if (zFail != stencilZFail_)
        {
            impl_->device_->SetRenderState(D3DRS_STENCILZFAIL, d3dStencilOp[zFail]);
            stencilZFail_ = zFail;
        }
        if (stencilRef != stencilRef_)
        {
            impl_->device_->SetRenderState(D3DRS_STENCILREF, stencilRef);
            stencilRef_ = stencilRef;
        }
        if (stencilMask != stencilMask_)
        {
            impl_->device_->SetRenderState(D3DRS_STENCILMASK, stencilMask);
            stencilMask_ = stencilMask;
        }
    }
}

void Graphics::SetStreamFrequency(unsigned index, unsigned frequency)
{
    if ((index < MAX_VERTEX_STREAMS) && (streamFrequency_[index] != frequency))
    {
        impl_->device_->SetStreamSourceFreq(index, frequency);
        streamFrequency_[index] = frequency;
    }
}

void Graphics::ResetStreamFrequencies()
{
    for (unsigned i = 0; i < MAX_VERTEX_STREAMS; ++i)
    {
        if (streamFrequency_[i] != 1)
        {
            impl_->device_->SetStreamSourceFreq(i, 1);
            streamFrequency_[i] = 1;
        }
    }
}

bool Graphics::BeginImmediate(PrimitiveType type, unsigned vertexCount, unsigned elementMask)
{
    if (immediateBuffer_)
    {
        LOGERROR("New immediate draw operation started before ending the last one");
        return false;
    }
    if (!(elementMask & MASK_POSITION))
    {
        LOGERROR("Immediate draw operation must contain vertex positions");
        return false;
    }
    if (!vertexCount)
        return true;
    
    // Start from default size, ensure that buffer is big enough to hold the immediate draw operation
    unsigned newSize = IMMEDIATE_BUFFER_DEFAULT_SIZE;
    while (newSize < vertexCount)
        newSize <<= 1;
        
    // See if buffer exists for this vertex format. If not, create new
    if (immediatevertexBuffer_.Find(elementMask) == immediatevertexBuffer_.End())
    {
        LOGDEBUG("Created immediate vertex buffer");
        VertexBuffer* newBuffer = new VertexBuffer(context_);
        newBuffer->SetSize(newSize, elementMask, true);
        immediatevertexBuffer_[elementMask] = newBuffer;
        immediateVertexBufferPos_[elementMask] = 0;
    }
    
    // Resize buffer if it is too small
    VertexBuffer* buffer = immediatevertexBuffer_[elementMask];
    if (buffer->GetVertexCount() < newSize)
    {
        LOGDEBUG("Resized immediate vertex buffer to " + String(newSize));
        buffer->SetSize(newSize, elementMask);
        immediateVertexBufferPos_[elementMask] = 0;
    }
    
    // Get the current lock position for the buffer
    unsigned bufferPos = immediateVertexBufferPos_[elementMask];
    if (bufferPos + vertexCount >= buffer->GetVertexCount())
        bufferPos = 0;
    
    LockMode lockMode = LOCK_DISCARD;
    if (bufferPos != 0)
        lockMode = LOCK_NOOVERWRITE;
    
    // Note: the data pointer gets pre-decremented here, because the first call to DefineVertex() will increment it
    immediateDataPtr_ = ((unsigned char*)buffer->Lock(bufferPos, vertexCount, lockMode)) - buffer->GetVertexSize();
    immediateBuffer_ = buffer;
    immediateType_= type;
    immediateStartPos_ = bufferPos;
    immediateVertexCount_ = vertexCount;
    immediateCurrentVertex_ = 0;
    
    // Store new buffer position for next lock into the same buffer
    bufferPos += vertexCount;
    if (bufferPos >= buffer->GetVertexCount())
        bufferPos = 0;
    immediateVertexBufferPos_[elementMask] = bufferPos;
    
    return true;
}

bool Graphics::DefineVertex(const Vector3& vertex)
{
    if ((!immediateBuffer_) || (immediateCurrentVertex_ >= immediateVertexCount_))
        return false;
    
    immediateDataPtr_ += immediateBuffer_->GetVertexSize();
    ++immediateCurrentVertex_;
    
    float* dest = (float*)(immediateDataPtr_ + immediateBuffer_->GetElementOffset(ELEMENT_POSITION));
    const float* src = vertex.GetData();
    dest[0] = src[0];
    dest[1] = src[1];
    dest[2] = src[2];
    
    return true;
}

bool Graphics::DefineNormal(const Vector3& normal)
{
    if ((!immediateBuffer_) ||(!(immediateBuffer_->GetElementMask() & MASK_NORMAL)) || (!immediateCurrentVertex_))
        return false;
    
    float* dest = (float*)(immediateDataPtr_ + immediateBuffer_->GetElementOffset(ELEMENT_NORMAL));
    const float* src = normal.GetData();
    dest[0] = src[0];
    dest[1] = src[1];
    dest[2] = src[2];
    
    return true;
}

bool Graphics::DefineTexCoord(const Vector2& texCoord)
{
    if ((!immediateBuffer_) || (!(immediateBuffer_->GetElementMask() & MASK_TEXCOORD1)) || (!immediateCurrentVertex_))
        return false;
    
    float* dest = (float*)(immediateDataPtr_ + immediateBuffer_->GetElementOffset(ELEMENT_TEXCOORD1));
    const float* src = texCoord.GetData();
    dest[0] = src[0];
    dest[1] = src[1];
    
    return true;
}

bool Graphics::DefineColor(const Color& color)
{
    if ((!immediateBuffer_) || (!(immediateBuffer_->GetElementMask() & MASK_COLOR)) || (!immediateCurrentVertex_))
        return false;
    
    unsigned* dest = (unsigned*)(immediateDataPtr_ + immediateBuffer_->GetElementOffset(ELEMENT_COLOR));
    *dest = color.ToUInt();
    
    return true;
}

bool Graphics::DefineColor(unsigned color)
{
    if ((!immediateBuffer_) || (!(immediateBuffer_->GetElementMask() & MASK_COLOR)) || (!immediateCurrentVertex_))
        return false;
    
    unsigned* dest = (unsigned*)(immediateDataPtr_ + immediateBuffer_->GetElementOffset(ELEMENT_COLOR));
    *dest = color;
    
    return true;
}

void Graphics::EndImmediate()
{
    if (immediateBuffer_)
    {
        immediateBuffer_->Unlock();
        SetVertexBuffer(immediateBuffer_);
        Draw(immediateType_, immediateStartPos_, immediateVertexCount_);
        immediateBuffer_ = 0;
    }
}

void Graphics::SetForceSM2(bool enable)
{
    // Note: this only has effect before calling SetMode() for the first time
    forceSM2_ = enable;
}

bool Graphics::IsInitialized() const
{
    return (impl_->window_ != 0) && (impl_->GetDevice() != 0);
}

unsigned char* Graphics::GetImmediateDataPtr() const
{
    if (!immediateBuffer_)
    {
        LOGERROR("Immediate draw operation not started");
        return 0;
    }
    // Pointer was pre-decremented in BeginImmediate(). Undo that now
    return immediateDataPtr_ + immediateBuffer_->GetVertexSize();
}

unsigned Graphics::GetWindowHandle() const
{
    return (unsigned)impl_->window_;
}

PODVector<IntVector2> Graphics::GetResolutions() const
{
    PODVector<IntVector2> ret;
    if (!impl_->interface_)
        return ret;
    
    D3DFORMAT fullscreenFormat = impl_->GetDesktopFormat();
    unsigned numModes = impl_->interface_->GetAdapterModeCount(impl_->adapter_, fullscreenFormat);
    D3DDISPLAYMODE displayMode;
    
    for (unsigned i = 0; i < numModes; ++i)
    {
        if (FAILED(impl_->interface_->EnumAdapterModes(impl_->adapter_, fullscreenFormat, i, &displayMode)))
            continue;
        if (displayMode.Format != fullscreenFormat)
            continue;
        IntVector2 newMode(displayMode.Width, displayMode.Height);
        
        // Check for duplicate before storing
        bool unique = true;
        for (unsigned j = 0; j < ret.Size(); ++j)
        {
            if (ret[j] == newMode)
            {
                unique = false;
                break;
            }
        }
        if (unique)
            ret.Push(newMode);
    }
    
    return ret;
}

PODVector<int> Graphics::GetMultiSampleLevels() const
{
    PODVector<int> ret;
    // No multisampling always supported
    ret.Push(0);
    
    if (!impl_->interface_)
        return ret;
    
    for (unsigned i = (int)D3DMULTISAMPLE_2_SAMPLES; i < (int)D3DMULTISAMPLE_16_SAMPLES; ++i)
    {
        if (SUCCEEDED(impl_->interface_->CheckDeviceMultiSampleType(impl_->adapter_, impl_->deviceType_, D3DFMT_R8G8B8, FALSE,
            (D3DMULTISAMPLE_TYPE)i, NULL)))
            ret.Push(i);
    }
    
    return ret;
}

VertexBuffer* Graphics::GetVertexBuffer(unsigned index) const
{
    return index < MAX_VERTEX_STREAMS ? vertexBuffer_[index] : 0;
}

ShaderParameter Graphics::GetShaderParameter(const String& name)
{
    Map<String, ShaderParameter>::Iterator i = shaderParameters_.Find(name);
    if (i != shaderParameters_.End())
        return i->second_;
    else
        return MAX_SHADER_PARAMETERS;
}

TextureUnit Graphics::GetTextureUnit(const String& name)
{
    Map<String, TextureUnit>::Iterator i = textureUnits_.Find(name);
    if (i != textureUnits_.End())
        return i->second_;
    else
        return MAX_TEXTURE_UNITS;
}

const String& Graphics::GetShaderParameterName(ShaderParameter parameter)
{
    for (Map<String, ShaderParameter>::Iterator i = shaderParameters_.Begin(); i != shaderParameters_.End(); ++i)
    {
        if (i->second_ == parameter)
            return i->first_;
    }
    return noParameter;
}

const String& Graphics::GetTextureUnitName(TextureUnit unit)
{
    for (Map<String, TextureUnit>::Iterator i = textureUnits_.Begin(); i != textureUnits_.End(); ++i)
    {
        if (i->second_ == unit)
            return i->first_;
    }
    return noParameter;
}

Texture* Graphics::GetTexture(unsigned index) const
{
    return index < MAX_TEXTURE_UNITS ? texture_[index] : 0;
}

RenderSurface* Graphics::GetRenderTarget(unsigned index) const
{
    return index < MAX_RENDERTARGETS ? renderTarget_[index] : 0;
}

unsigned Graphics::GetStreamFrequency(unsigned index) const
{
    return index < MAX_VERTEX_STREAMS ? streamFrequency_[index] : 0;
}

IntVector2 Graphics::GetRenderTargetDimensions() const
{
    int width, height;
    
    if (renderTarget_[0])
    {
        width = renderTarget_[0]->GetWidth();
        height = renderTarget_[0]->GetHeight();
    }
    else
    {
        width = width_;
        height = height_;
    }
    
    return IntVector2(width, height);
}

void Graphics::AddGPUObject(GPUObject* object)
{
    gpuObjects_.Push(object);
}

void Graphics::RemoveGPUObject(GPUObject* object)
{
    for (Vector<GPUObject*>::Iterator i = gpuObjects_.Begin(); i != gpuObjects_.End(); ++i)
    {
        if ((*i) == object)
        {
            gpuObjects_.Erase(i);
            return;
        }
    }
}

unsigned Graphics::GetAlphaFormat()
{
    return D3DFMT_A8;
}

unsigned Graphics::GetLuminanceFormat()
{
    return D3DFMT_L8;
}

unsigned Graphics::GetLuminanceAlphaFormat()
{
    return D3DFMT_A8L8;
}

unsigned Graphics::GetRGBFormat()
{
    return D3DFMT_X8R8G8B8;
}

unsigned Graphics::GetRGBAFormat()
{
    return D3DFMT_A8R8G8B8;
}

unsigned Graphics::GetDepthFormat()
{
    return D3DFMT_R32F;
}

bool Graphics::OpenWindow(int width, int height)
{
    WNDCLASS wc;
    wc.style         = CS_HREDRAW | CS_VREDRAW;
    wc.lpfnWndProc   = wndProc;
    wc.cbClsExtra    = 0;
    wc.cbWndExtra    = 0;
    wc.hInstance     = impl_->instance_;
    wc.hIcon         = LoadIcon(0, IDI_APPLICATION);
    wc.hCursor       = LoadCursor(0, IDC_ARROW);
    wc.hbrBackground = 0;
    wc.lpszMenuName  = 0;
    wc.lpszClassName = "D3DWindow";
    
    RegisterClass(&wc);
    
    RECT rect = {0, 0, width, height};
    AdjustWindowRect(&rect, windowStyle, false);
    impl_->window_ = CreateWindow("D3DWindow", windowTitle_.CString(), windowStyle, CW_USEDEFAULT, CW_USEDEFAULT,
        rect.right, rect.bottom, 0, 0, impl_->instance_, 0); 
    
    if (!impl_->window_)
    {
        LOGERROR("Could not create window");
        return false;
    }
    
    SetWindowLongPtr(impl_->window_, GWLP_USERDATA, reinterpret_cast<LONG_PTR>(this));
    
    // Save window placement
    WINDOWPLACEMENT wndpl;
    wndpl.length = sizeof wndpl;
    if (SUCCEEDED(GetWindowPlacement(impl_->window_, &wndpl)))
    {
        windowPosX_ = wndpl.rcNormalPosition.left;
        windowPosY_ = wndpl.rcNormalPosition.top;
    }
    
    LOGINFO("Created application window");
    return true;
}

bool Graphics::CreateInterface()
{
    impl_->interface_ = Direct3DCreate9(D3D9b_SDK_VERSION);
    if (!impl_->interface_)
    {
        LOGERROR("Could not create Direct3D9 interface");
        return false;
    }
    
    if (FAILED(impl_->interface_->GetDeviceCaps(impl_->adapter_, impl_->deviceType_, &impl_->deviceCaps_)))
    {
        LOGERROR("Could not get Direct3D capabilities");
        return false;
    }
    
    if (FAILED(impl_->interface_->GetAdapterIdentifier(impl_->adapter_, 0, &impl_->adapterIdentifier_)))
    {
        LOGERROR("Could not get Direct3D adapter identifier");
        return false;
    }
    
    if (impl_->deviceCaps_.PixelShaderVersion < D3DPS_VERSION(2, 0))
    {
        LOGERROR("Shader model 2.0 display adapter is required");
        return false;
    }
    
    // Check supported features: Shader Model 3, deferred / light prepass rendering, hardware depth texture, shadow map,
    // dummy color surface, stream offset
    if (!forceSM2_)
    {
        if ((impl_->deviceCaps_.VertexShaderVersion >= D3DVS_VERSION(3, 0)) && (impl_->deviceCaps_.PixelShaderVersion >=
            D3DPS_VERSION(3, 0)))
            hasSM3_ = true;
    }
    
    if (impl_->CheckFormatSupport(D3DFMT_R32F, D3DUSAGE_RENDERTARGET, D3DRTYPE_TEXTURE))
    {
        if (impl_->deviceCaps_.NumSimultaneousRTs >= 3)
            deferredSupport_ = true;
        if (impl_->deviceCaps_.NumSimultaneousRTs >= 2)
            prepassSupport_ = true;
    }
    
    // Prefer NVIDIA style hardware depth Compared shadow maps if available
    shadowMapFormat_ = D3DFMT_D16;
    if (impl_->CheckFormatSupport((D3DFORMAT)shadowMapFormat_, D3DUSAGE_DEPTHSTENCIL, D3DRTYPE_TEXTURE))
    {
        hardwareShadowSupport_ = true;
        
        // Check for hires depth support
        hiresShadowMapFormat_ = D3DFMT_D24X8;
        if (impl_->CheckFormatSupport((D3DFORMAT)hiresShadowMapFormat_, D3DUSAGE_DEPTHSTENCIL, D3DRTYPE_TEXTURE))
            hiresShadowSupport_ = true;
        else
            hiresShadowMapFormat_ = shadowMapFormat_;
    }
    else
    {
        // ATI DF16 format needs manual depth compare in the shader
        shadowMapFormat_ = MAKEFOURCC('D', 'F', '1', '6');
        if (impl_->CheckFormatSupport((D3DFORMAT)shadowMapFormat_, D3DUSAGE_DEPTHSTENCIL, D3DRTYPE_TEXTURE))
        {
            // Check for hires depth support
            hiresShadowMapFormat_ = MAKEFOURCC('D', 'F', '2', '4');
            if (impl_->CheckFormatSupport((D3DFORMAT)hiresShadowMapFormat_, D3DUSAGE_DEPTHSTENCIL, D3DRTYPE_TEXTURE))
                hiresShadowSupport_ = true;
            else
                hiresShadowMapFormat_ = shadowMapFormat_;
        }
        else
        {
            // No depth texture shadow map support -> no shadows at all
            shadowMapFormat_ = 0;
            hiresShadowMapFormat_ = 0;
        }
    }
    
    // Check for Intel 4 Series with an old driver, enable manual shadow map compare in that case
    if (shadowMapFormat_ == D3DFMT_D16)
    {
        if ((impl_->adapterIdentifier_.VendorId == 0x8086) && (impl_->adapterIdentifier_.DeviceId == 0x2a42) &&
            (impl_->adapterIdentifier_.DriverVersion.QuadPart <= 0x0007000f000a05d0ULL))
            hardwareShadowSupport_ = false;
    }
    
    dummyColorFormat_ = D3DFMT_A8R8G8B8;
    D3DFORMAT nullFormat = (D3DFORMAT)MAKEFOURCC('N', 'U', 'L', 'L');
    if (impl_->CheckFormatSupport(nullFormat, D3DUSAGE_RENDERTARGET, D3DRTYPE_TEXTURE))
        dummyColorFormat_ = nullFormat;
    else if (impl_->CheckFormatSupport(D3DFMT_R16F, D3DUSAGE_RENDERTARGET, D3DRTYPE_TEXTURE))
        dummyColorFormat_ = D3DFMT_R16F;
    else if (impl_->CheckFormatSupport(D3DFMT_R5G6B5, D3DUSAGE_RENDERTARGET, D3DRTYPE_TEXTURE))
        dummyColorFormat_ = D3DFMT_R5G6B5;
    else if (impl_->CheckFormatSupport(D3DFMT_A4R4G4B4, D3DUSAGE_RENDERTARGET, D3DRTYPE_TEXTURE))
        dummyColorFormat_ = D3DFMT_A4R4G4B4;
    
    if (impl_->deviceCaps_.DevCaps2 & D3DDEVCAPS2_STREAMOFFSET)
        streamOffsetSupport_ = true;
    
    return true;
}

bool Graphics::CreateDevice(unsigned adapter, unsigned deviceType)
{
    DWORD behaviorFlags = 0;
    if (impl_->deviceCaps_.DevCaps & D3DDEVCAPS_HWTRANSFORMANDLIGHT)
    {
        behaviorFlags |= D3DCREATE_HARDWARE_VERTEXPROCESSING;
        if (impl_->deviceCaps_.DevCaps & D3DDEVCAPS_PUREDEVICE)
            behaviorFlags |= D3DCREATE_PUREDEVICE;
    }
    else
        behaviorFlags |= D3DCREATE_SOFTWARE_VERTEXPROCESSING;
    
    if (FAILED(impl_->interface_->CreateDevice(
        adapter,                    // adapter
        (D3DDEVTYPE)deviceType,     // device type
        impl_->window_,             // window associated with device
        behaviorFlags,              // vertex processing
        &impl_->presentParams_,     // present parameters
        &impl_->device_)))          // return created device
    {
        LOGERROR("Could not create Direct3D9 device");
        return false;
    }
    
    impl_->adapter_ = adapter;
    impl_->deviceType_ = (D3DDEVTYPE)deviceType;
    
    OnDeviceReset();
    
    LOGINFO("Created Direct3D9 device");
    return true;
}

void Graphics::CreateRenderTargets()
{
    if (mode_ != RENDER_FORWARD)
    {
        // In deferred rendering, the diffuse buffer stores diffuse albedo. In light prepass, it is used for light accumulation
        if (!diffBuffer_)
        {
            diffBuffer_ = new Texture2D(context_);
            diffBuffer_->SetSize(0, 0, GetRGBAFormat(), TEXTURE_RENDERTARGET);
        }
        
        if (!normalBuffer_)
        {
            normalBuffer_ = new Texture2D(context_);
            normalBuffer_->SetSize(0, 0, GetRGBAFormat(), TEXTURE_RENDERTARGET);
        }
        
        if (!depthBuffer_)
        {
            depthBuffer_ = new Texture2D(context_);
            depthBuffer_->SetSize(0, 0, GetDepthFormat(), TEXTURE_RENDERTARGET);
        }
        
        // If deferred mode temporal AA is used, reserve screen buffers
        // (later we will probably want the screen buffer reserved in any case, to do for example distortion effects,
        // which will also be useful in forward rendering)
        if (multiSample_)
        {
            for (unsigned i = 0; i < NUM_SCREEN_BUFFERS; ++i)
            {
                screenBuffer_[i] = new Texture2D(context_);
                screenBuffer_[i]->SetSize(0, 0, GetRGBAFormat(), TEXTURE_RENDERTARGET);
            }
        }
        else
        {
            for (unsigned i = 0; i < NUM_SCREEN_BUFFERS; ++i)
                screenBuffer_[i].Reset();
        }
    }
    else
    {
        diffBuffer_.Reset();
        normalBuffer_.Reset();
        depthBuffer_.Reset();
        for (unsigned i = 0; i < NUM_SCREEN_BUFFERS; ++i)
            screenBuffer_[i].Reset();
    }
}

void Graphics::ResetDevice()
{
    OnDeviceLost();
    
    if (SUCCEEDED(impl_->device_->Reset(&impl_->presentParams_)))
    {
        deviceLost_ = false;
        OnDeviceReset();
    }
}

void Graphics::OnDeviceLost()
{
    if (impl_->frameQuery_)
    {
        impl_->frameQuery_->Release();
        impl_->frameQuery_ = 0;
    }
    if (impl_->defaultColorSurface_)
    {
        impl_->defaultColorSurface_->Release();
        impl_->defaultColorSurface_ = 0;
    }
    if (impl_->defaultDepthStencilSurface_)
    {
        impl_->defaultDepthStencilSurface_->Release();
        impl_->defaultDepthStencilSurface_ = 0;
    }
    
    for (unsigned i = 0; i < gpuObjects_.Size(); ++i)
        gpuObjects_[i]->OnDeviceLost();
}

void Graphics::OnDeviceReset()
{
    ResetCachedState();
    
    // Create frame query
    impl_->device_->CreateQuery(D3DQUERYTYPE_EVENT, &impl_->frameQuery_);
    
    // Create deferred rendering buffers now
    CreateRenderTargets();
    
    for (unsigned i = 0; i < gpuObjects_.Size(); ++i)
        gpuObjects_[i]->OnDeviceReset();
    
    // Get default surfaces
    impl_->device_->GetRenderTarget(0, &impl_->defaultColorSurface_);
    impl_->device_->GetDepthStencilSurface(&impl_->defaultDepthStencilSurface_);
    
    immediateBuffer_ = 0;
}

void Graphics::ResetCachedState()
{
    for (unsigned i = 0; i < MAX_VERTEX_STREAMS; ++i)
    {
        vertexBuffer_[i] = 0;
        streamOffset_[i] = 0;
    }
    
    for (unsigned i = 0; i < MAX_TEXTURE_UNITS; ++i)
    {
        texture_[i] = 0;
        impl_->minMagFilter_[i] = D3DTEXF_POINT;
        impl_->mipFilter_[i] = D3DTEXF_NONE;
        impl_->uAddressMode_[i] = D3DTADDRESS_WRAP;
        impl_->vAddressMode_[i] = D3DTADDRESS_WRAP;
        impl_->borderColor_[i] = Color(0.0f, 0.0f, 0.0f, 0.0f);
    }
    
    for (unsigned i = 0; i < MAX_RENDERTARGETS; ++i)
    {
        renderTarget_[i] = 0;
        impl_->colorSurface_[i] = 0;
    }
    depthStencil_ = 0;
    impl_->depthStencilSurface_ = 0;
    viewport_ = IntRect(0, 0, width_, height_);
    viewTexture_ = 0;
    
    for (unsigned i = 0; i < MAX_VERTEX_STREAMS; ++i)
        streamFrequency_[i] = 1;
    
    indexBuffer_ = 0;
    vertexDeclaration_ = 0;
    vertexShader_ = 0;
    pixelShader_ = 0;
    blendMode_ = BLEND_REPLACE;
    alphaTest_ = false;
    alphaTestMode_ = CMP_ALWAYS;
    alphaRef_ = 0.0f;
    textureAnisotropy_ = 1;
    colorWrite_ = true;
    cullMode_ = CULL_CCW;
    constantDepthBias_ = 0.0f;
    slopeScaledDepthBias_ = 0.0f;
    depthTestMode_ = CMP_LESSEQUAL;
    depthWrite_ = true;
    fillMode_ = FILL_SOLID;
    scissorTest_ = false;
    scissorRect_ = IntRect::ZERO;
    stencilTest_ = false;
    stencilTestMode_ = CMP_ALWAYS;
    stencilPass_ = OP_KEEP;
    stencilFail_ = OP_KEEP;
    stencilZFail_ = OP_KEEP;
    stencilRef_ = 0;
    stencilMask_ = M_MAX_UNSIGNED;
    impl_->blendEnable_ = FALSE;
    impl_->srcBlend_ = D3DBLEND_ONE;
    impl_->destBlend_ = D3DBLEND_ZERO;
    
    queryIssued_ = false;
}


void Graphics::InitializeShaderParameters()
{
    // Initialize all parameters as unknown
    for (unsigned i = 0; i < MAX_SHADER_PARAMETERS; ++i)
        shaderRegisters_[i] = MAX_CONSTANT_REGISTERS;
    
    // Map parameter names
    shaderParameters_["CameraPos"] = VSP_CAMERAPOS;
    shaderParameters_["CameraRot"] = VSP_CAMERAROT;
    shaderParameters_["DepthMode"] = VSP_DEPTHMODE;
    shaderParameters_["ElapsedTime"] = VSP_ELAPSEDTIME;
    shaderParameters_["FrustumSize"] = VSP_FRUSTUMSIZE;
    shaderParameters_["GBufferOffsets"] = VSP_GBUFFEROFFSETS;
    shaderParameters_["Model"] = VSP_MODEL;
    shaderParameters_["ShadowProj"] = VSP_SHADOWPROJ;
    shaderParameters_["SpotProj"] = VSP_SPOTPROJ;
    shaderParameters_["ViewProj"] = VSP_VIEWPROJ;
    shaderParameters_["UOffset"] = VSP_UOFFSET;
    shaderParameters_["VOffset"] = VSP_VOFFSET;
    shaderParameters_["ViewRightVector"] = VSP_VIEWRIGHTVECTOR;
    shaderParameters_["ViewUpVector"] = VSP_VIEWUPVECTOR;
    shaderParameters_["SkinMatrices"] = VSP_SKINMATRICES;
    
    shaderParameters_["AmbientColor"] = PSP_AMBIENTCOLOR;
    shaderParameters_["AntiAliasWeights"] = PSP_ANTIALIASWEIGHTS;
    shaderParameters_["CameraPosPS"] = PSP_CAMERAPOS;
    shaderParameters_["ElapsedTimePS"] = PSP_ELAPSEDTIME;
    shaderParameters_["FogColor"] = PSP_FOGCOLOR;
    shaderParameters_["FogParams"] = PSP_FOGPARAMS;
    shaderParameters_["GBufferOffsetsPS"] = PSP_GBUFFEROFFSETS;
    shaderParameters_["GBufferViewport"] = PSP_GBUFFERVIEWPORT;
    shaderParameters_["LightAtten"] = PSP_LIGHTATTEN;
    shaderParameters_["LightColor"] = PSP_LIGHTCOLOR;
    shaderParameters_["LightDir"] = PSP_LIGHTDIR;
    shaderParameters_["LightPos"] = PSP_LIGHTPOS;
    shaderParameters_["LightSplits"] = PSP_LIGHTSPLITS;
    shaderParameters_["LightVecRot"] = PSP_LIGHTVECROT;
    shaderParameters_["MatDiffColor"] = PSP_MATDIFFCOLOR;
    shaderParameters_["MatEmissiveColor"] = PSP_MATEMISSIVECOLOR;
    shaderParameters_["MatSpecProperties"] = PSP_MATSPECPROPERTIES;
    shaderParameters_["SampleOffsets"] = PSP_SAMPLEOFFSETS;
    shaderParameters_["ShadowIntensity"] = PSP_SHADOWINTENSITY;
    shaderParameters_["ShadowProjPS"] = PSP_SHADOWPROJ;
    shaderParameters_["SpotProjPS"] = PSP_SPOTPROJ;
    shaderParameters_["ViewProjPS"] = PSP_VIEWPROJ;
    
    // Map texture units
    textureUnits_["NormalMap"] = TU_NORMAL;
    textureUnits_["DiffMap"] = TU_DIFFUSE;
    textureUnits_["DiffCubeMap"] = TU_DIFFUSE;
    textureUnits_["SpecMap"] = TU_SPECULAR;
    textureUnits_["EmissiveMap"] = TU_EMISSIVE;
    textureUnits_["DetailMap"] = TU_DETAIL;
    textureUnits_["EnvironmentMap"] = TU_ENVIRONMENT;
    textureUnits_["EnvironmentCubeMap"] = TU_ENVIRONMENT;
    textureUnits_["LightRampMap"] = TU_LIGHTRAMP;
    textureUnits_["LightSpotMap"] = TU_LIGHTSPOT;
    textureUnits_["LightCubeMap"]  = TU_LIGHTSPOT;
    textureUnits_["ShadowMap"] = TU_SHADOWMAP;
    textureUnits_["DiffBuffer"] = TU_DIFFBUFFER;
    textureUnits_["NormalBuffer"] = TU_NORMALBUFFER;
    textureUnits_["DepthBuffer"] = TU_DEPTHBUFFER;
    textureUnits_["LightBuffer"] = TU_LIGHTBUFFER;
}

void Graphics::HandleWindowMessage(StringHash eventType, VariantMap& eventData)
{
    using namespace WindowMessage;
    
    if (eventData[P_WINDOW].GetInt() != (int)impl_->window_)
        return;
    
    switch (eventData[P_MSG].GetInt())
    {
    case WM_CLOSE:
        Close();
        eventData[P_HANDLED] = true;
        break;
        
    case WM_DESTROY:
        eventData[P_HANDLED] = true;
        break;
    }
}

LRESULT CALLBACK wndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    using namespace WindowMessage;
    
    Graphics* graphics = reinterpret_cast<Graphics*>(GetWindowLongPtr(hwnd, GWLP_USERDATA));
    
    if ((graphics) && (graphics->IsInitialized()))
    {
        VariantMap eventData;
        eventData[P_WINDOW] = (int)hwnd;
        eventData[P_MSG] = (int)msg;
        eventData[P_WPARAM] = (int)wParam;
        eventData[P_LPARAM] = (int)lParam;
        eventData[P_HANDLED] = false;
        
        graphics->SendEvent(E_WINDOWMESSAGE, eventData);
        if (eventData[P_HANDLED].GetBool())
            return 0;
    }
    
    return DefWindowProc(hwnd, msg, wParam, lParam);
}

void RegisterGraphicsLibrary(Context* context)
{
    Animation::RegisterObject(context);
    Material::RegisterObject(context);
    Model::RegisterObject(context);
    Shader::RegisterObject(context);
    Technique::RegisterObject(context);
    Texture2D::RegisterObject(context);
    TextureCube::RegisterObject(context);
    Camera::RegisterObject(context);
    Drawable::RegisterObject(context);
    Light::RegisterObject(context);
    StaticModel::RegisterObject(context);
    Skybox::RegisterObject(context);
    AnimatedModel::RegisterObject(context);
    AnimationController::RegisterObject(context);
    BillboardSet::RegisterObject(context);
    ParticleEmitter::RegisterObject(context);
    DebugRenderer::RegisterObject(context);
    Octree::RegisterObject(context);
    Zone::RegisterObject(context);
}