The Tor Browser: gfx/2d/RadialGradientEffectD2D1.cpp@6474c204b198 (annotated)

gfx/2d/RadialGradientEffectD2D1.cpp@6474c204b198 (annotated)

gfx/2d/RadialGradientEffectD2D1.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   * This Source Code Form is subject to the terms of the Mozilla Public
   * License, v. 2.0. If a copy of the MPL was not distributed with this
   * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include "RadialGradientEffectD2D1.h"
 #include "Logging.h"
 #include "ShadersD2D1.h"
 #include "HelpersD2D.h"
 #include <vector>
 #define TEXTW(x) L##x
 #define XML(X) TEXTW(#X) // This macro creates a single string from multiple lines of text.
 static const PCWSTR kXmlDescription =
     XML(
         <?xml version='1.0'?>
         <Effect>
             <!-- System Properties -->
             <Property name='DisplayName' type='string' value='RadialGradientEffect'/>
             <Property name='Author' type='string' value='Mozilla'/>
             <Property name='Category' type='string' value='Pattern effects'/>
             <Property name='Description' type='string' value='This effect is used to render radial gradients in a manner compliant with the 2D Canvas specification.'/>
             <Inputs>
                 <Input name='Geometry'/>
             </Inputs>
             <Property name='StopCollection' type='iunknown'>
               <Property name='DisplayName' type='string' value='Gradient stop collection'/>
             </Property>
             <Property name='Center1' type='vector2'>
               <Property name='DisplayName' type='string' value='Inner circle center'/>
             </Property>
             <Property name='Center2' type='vector2'>
               <Property name='DisplayName' type='string' value='Outer circle center'/>
             </Property>
             <Property name='Radius1' type='float'>
               <Property name='DisplayName' type='string' value='Inner circle radius'/>
             </Property>
             <Property name='Radius2' type='float'>
               <Property name='DisplayName' type='string' value='Outer circle radius'/>
             </Property>
             <Property name='Transform' type='matrix3x2'>
               <Property name='DisplayName' type='string' value='Transform applied to the pattern'/>
             </Property>
         </Effect>
         );
 // {FB947CDA-718E-40CC-AE7B-D255830D7D14}
 static const GUID GUID_SampleRadialGradientPS =
   {0xfb947cda, 0x718e, 0x40cc, {0xae, 0x7b, 0xd2, 0x55, 0x83, 0xd, 0x7d, 0x14}};
 // {2C468128-6546-453C-8E25-F2DF0DE10A0F}
 static const GUID GUID_SampleRadialGradientA0PS =
   {0x2c468128, 0x6546, 0x453c, {0x8e, 0x25, 0xf2, 0xdf, 0xd, 0xe1, 0xa, 0xf}};
 namespace mozilla {
 namespace gfx {
 RadialGradientEffectD2D1::RadialGradientEffectD2D1()
   : mRefCount(0)
   , mCenter1(D2D1::Vector2F(0, 0))
   , mCenter2(D2D1::Vector2F(0, 0))
   , mRadius1(0)
   , mRadius2(0)
   , mTransform(D2D1::IdentityMatrix())
 {
 }
 IFACEMETHODIMP
 RadialGradientEffectD2D1::Initialize(ID2D1EffectContext* pContextInternal, ID2D1TransformGraph* pTransformGraph)
 {
   HRESULT hr;
   hr = pContextInternal->LoadPixelShader(GUID_SampleRadialGradientPS, SampleRadialGradientPS, sizeof(SampleRadialGradientPS));
   if (FAILED(hr)) {
     return hr;
   }
   hr = pContextInternal->LoadPixelShader(GUID_SampleRadialGradientA0PS, SampleRadialGradientA0PS, sizeof(SampleRadialGradientA0PS));
   if (FAILED(hr)) {
     return hr;
   }
   hr = pTransformGraph->SetSingleTransformNode(this);
   if (FAILED(hr)) {
     return hr;
   }
   mEffectContext = pContextInternal;
   return S_OK;
 }
 IFACEMETHODIMP
 RadialGradientEffectD2D1::PrepareForRender(D2D1_CHANGE_TYPE changeType)
 {
   if (changeType == D2D1_CHANGE_TYPE_NONE) {
     return S_OK;
   }
   // We'll need to inverse transform our pixel, precompute inverse here.
   Matrix mat = ToMatrix(mTransform);
   if (!mat.Invert()) {
     // Singular
     return S_OK;
   }
   if (!mStopCollection) {
     return S_OK;
   }
   D2D1_POINT_2F dc = D2D1::Point2F(mCenter2.x - mCenter1.x, mCenter2.y - mCenter2.y);
   float dr = mRadius2 - mRadius1;
   float A = dc.x * dc.x + dc.y * dc.y - dr * dr;
   HRESULT hr;
   if (A == 0) {
     hr = mDrawInfo->SetPixelShader(GUID_SampleRadialGradientA0PS);
   } else {
     hr = mDrawInfo->SetPixelShader(GUID_SampleRadialGradientPS);
   }
   if (FAILED(hr)) {
     return hr;
   }
   RefPtr<ID2D1ResourceTexture> tex = CreateGradientTexture();
   hr = mDrawInfo->SetResourceTexture(1, tex);
   if (FAILED(hr)) {
     return hr;
   }
   struct PSConstantBuffer
   {
     float diff[3];
     float padding;
     float center1[2];
     float A;
     float radius1;
     float sq_radius1;
     float padding2[3];
     float transform[8];
   };
   PSConstantBuffer buffer = { { dc.x, dc.y, dr }, 0,
                               { mCenter1.x, mCenter1.y },
                               A, mRadius1, mRadius1 * mRadius1,
                               { 0, 0, 0 }, { mat._11, mat._21, mat._31, 0,
                                              mat._12, mat._22, mat._32, 0 } };
   hr = mDrawInfo->SetPixelShaderConstantBuffer((BYTE*)&buffer, sizeof(buffer));
   if (FAILED(hr)) {
     return hr;
   }
   return S_OK;
 }
 IFACEMETHODIMP
 RadialGradientEffectD2D1::SetGraph(ID2D1TransformGraph* pGraph)
 {
   return pGraph->SetSingleTransformNode(this);
 }
 IFACEMETHODIMP_(ULONG)
 RadialGradientEffectD2D1::AddRef()
 {
   return ++mRefCount;
 }
 IFACEMETHODIMP_(ULONG)
 RadialGradientEffectD2D1::Release()
 {
   if (!--mRefCount) {
     delete this;
     return 0;
   }
   return mRefCount;
 }
 IFACEMETHODIMP
 RadialGradientEffectD2D1::QueryInterface(const IID &aIID, void **aPtr)
 {
   if (!aPtr) {
     return E_POINTER;
   }
   if (aIID == IID_IUnknown) {
     *aPtr = static_cast<IUnknown*>(static_cast<ID2D1EffectImpl*>(this));
   } else if (aIID == IID_ID2D1EffectImpl) {
     *aPtr = static_cast<ID2D1EffectImpl*>(this);
   } else if (aIID == IID_ID2D1DrawTransform) {
     *aPtr = static_cast<ID2D1DrawTransform*>(this);
   } else if (aIID == IID_ID2D1Transform) {
     *aPtr = static_cast<ID2D1Transform*>(this);
   } else if (aIID == IID_ID2D1TransformNode) {
     *aPtr = static_cast<ID2D1TransformNode*>(this);
   } else {
     return E_NOINTERFACE;
   }
   static_cast<IUnknown*>(*aPtr)->AddRef();
   return S_OK;
 }
 IFACEMETHODIMP
 RadialGradientEffectD2D1::MapInputRectsToOutputRect(const D2D1_RECT_L* pInputRects,
                                                     const D2D1_RECT_L* pInputOpaqueSubRects,
                                                     UINT32 inputRectCount,
                                                     D2D1_RECT_L* pOutputRect,
                                                     D2D1_RECT_L* pOutputOpaqueSubRect)
 {
   if (inputRectCount != 1) {
     return E_INVALIDARG;
   }
   *pOutputRect = *pInputRects;
   *pOutputOpaqueSubRect = *pInputOpaqueSubRects;
   return S_OK;
 }
 IFACEMETHODIMP
 RadialGradientEffectD2D1::MapOutputRectToInputRects(const D2D1_RECT_L* pOutputRect,
                                                     D2D1_RECT_L* pInputRects,
                                                     UINT32 inputRectCount) const
 {
   if (inputRectCount != 1) {
       return E_INVALIDARG;
   }
   *pInputRects = *pOutputRect;
   return S_OK;
 }
 IFACEMETHODIMP
 RadialGradientEffectD2D1::MapInvalidRect(UINT32 inputIndex,
                                          D2D1_RECT_L invalidInputRect,
                                          D2D1_RECT_L* pInvalidOutputRect) const
 {
   MOZ_ASSERT(inputIndex = 0);
   *pInvalidOutputRect = invalidInputRect;
   return S_OK;
 }
 IFACEMETHODIMP
 RadialGradientEffectD2D1::SetDrawInfo(ID2D1DrawInfo *pDrawInfo)
 {
   mDrawInfo = pDrawInfo;
   return S_OK;
 }
 HRESULT
 RadialGradientEffectD2D1::Register(ID2D1Factory1 *aFactory)
 {
   D2D1_PROPERTY_BINDING bindings[] = {
     D2D1_VALUE_TYPE_BINDING(L"StopCollection", &RadialGradientEffectD2D1::SetStopCollection,
                             &RadialGradientEffectD2D1::GetStopCollection),
     D2D1_VALUE_TYPE_BINDING(L"Center1", &RadialGradientEffectD2D1::SetCenter1, &RadialGradientEffectD2D1::GetCenter1),
     D2D1_VALUE_TYPE_BINDING(L"Center2", &RadialGradientEffectD2D1::SetCenter2, &RadialGradientEffectD2D1::GetCenter2),
     D2D1_VALUE_TYPE_BINDING(L"Radius1", &RadialGradientEffectD2D1::SetRadius1, &RadialGradientEffectD2D1::GetRadius1),
     D2D1_VALUE_TYPE_BINDING(L"Radius2", &RadialGradientEffectD2D1::SetRadius2, &RadialGradientEffectD2D1::GetRadius2),
     D2D1_VALUE_TYPE_BINDING(L"Transform", &RadialGradientEffectD2D1::SetTransform, &RadialGradientEffectD2D1::GetTransform)
   };
   HRESULT hr = aFactory->RegisterEffectFromString(CLSID_RadialGradientEffect, kXmlDescription, bindings, ARRAYSIZE(bindings), CreateEffect);
   if (FAILED(hr)) {
     gfxWarning() << "Failed to register radial gradient effect.";
   }
   return hr;
 }
 HRESULT __stdcall
 RadialGradientEffectD2D1::CreateEffect(IUnknown **aEffectImpl)
 {
   *aEffectImpl = static_cast<ID2D1EffectImpl*>(new RadialGradientEffectD2D1());
   (*aEffectImpl)->AddRef();
   return S_OK;
 }
 HRESULT
 RadialGradientEffectD2D1::SetStopCollection(IUnknown *aStopCollection)
 {
   if (SUCCEEDED(aStopCollection->QueryInterface((ID2D1GradientStopCollection**)byRef(mStopCollection)))) {
     return S_OK;
   }
   return E_INVALIDARG;
 }
 TemporaryRef<ID2D1ResourceTexture>
 RadialGradientEffectD2D1::CreateGradientTexture()
 {
   std::vector<D2D1_GRADIENT_STOP> rawStops;
   rawStops.resize(mStopCollection->GetGradientStopCount());
   mStopCollection->GetGradientStops(&rawStops.front(), rawStops.size());
   std::vector<unsigned char> textureData;
   textureData.resize(4096 * 4);
   unsigned char *texData = &textureData.front();
   float prevColorPos = 0;
   float nextColorPos = 1.0f;
   D2D1_COLOR_F prevColor = rawStops[0].color;
   D2D1_COLOR_F nextColor = prevColor;
   if (rawStops.size() >= 2) {
     nextColor = rawStops[1].color;
     nextColorPos = rawStops[1].position;
   }
   uint32_t stopPosition = 2;
   // Not the most optimized way but this will do for now.
   for (int i = 0; i < 4096; i++) {
     // The 4095 seems a little counter intuitive, but we want the gradient
     // color at offset 0 at the first pixel, and at offset 1.0f at the last
     // pixel.
     float pos = float(i) / 4095;
     while (pos > nextColorPos) {
       prevColor = nextColor;
       prevColorPos = nextColorPos;
       if (rawStops.size() > stopPosition) {
         nextColor = rawStops[stopPosition].color;
         nextColorPos = rawStops[stopPosition++].position;
       } else {
         nextColorPos = 1.0f;
       }
     }
     float interp;
     if (nextColorPos != prevColorPos) {
       interp = (pos - prevColorPos) / (nextColorPos - prevColorPos);
     } else {
       interp = 0;
     }
     Color newColor(prevColor.r + (nextColor.r - prevColor.r) * interp,
                     prevColor.g + (nextColor.g - prevColor.g) * interp,
                     prevColor.b + (nextColor.b - prevColor.b) * interp,
                     prevColor.a + (nextColor.a - prevColor.a) * interp);
     // Note D2D expects RGBA here!!
     texData[i * 4] = (char)(255.0f * newColor.r);
     texData[i * 4 + 1] = (char)(255.0f * newColor.g);
     texData[i * 4 + 2] = (char)(255.0f * newColor.b);
     texData[i * 4 + 3] = (char)(255.0f * newColor.a);
   }
   RefPtr<ID2D1ResourceTexture> tex;
   UINT32 width = 4096;
   UINT32 stride = 4096 * 4;
   D2D1_RESOURCE_TEXTURE_PROPERTIES props;
   props.dimensions = 1;
   props.extents = &width;
   props.channelDepth = D2D1_CHANNEL_DEPTH_4;
   props.bufferPrecision = D2D1_BUFFER_PRECISION_8BPC_UNORM;
   props.filter = D2D1_FILTER_MIN_MAG_MIP_LINEAR;
   D2D1_EXTEND_MODE extendMode = mStopCollection->GetExtendMode();
   props.extendModes = &extendMode;
   HRESULT hr = mEffectContext->CreateResourceTexture(nullptr, &props, &textureData.front(), &stride, 4096 * 4, byRef(tex));
   if (FAILED(hr)) {
     gfxWarning() << "Failed to create resource texture: " << hr;
   }
   return tex;
 }
 }
 }

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gfx/2d/RadialGradientEffectD2D1.cpp@6474c204b198 (annotated)

gfx/2d/RadialGradientEffectD2D1.cpp