C++ gfx::Matrix4x4类代码示例

Maybe<wr::WrImageMask>
WebRenderImageLayer::RenderMaskLayer(const StackingContextHelper& aSc,
                                     const gfx::Matrix4x4& aTransform)
{
  if (!mContainer) {
     return Nothing();
  }

  CompositableType type = GetImageClientType();
  if (type == CompositableType::UNKNOWN) {
    return Nothing();
  }

  MOZ_ASSERT(GetImageClientType() == CompositableType::IMAGE);
  if (GetImageClientType() != CompositableType::IMAGE) {
    return Nothing();
  }

  if (!mImageClient) {
    mImageClient = ImageClient::CreateImageClient(CompositableType::IMAGE,
                                                  WrBridge(),
                                                  TextureFlags::DEFAULT);
    if (!mImageClient) {
      return Nothing();
    }
    mImageClient->Connect();
  }

  if (mExternalImageId.isNothing()) {
    mExternalImageId = Some(WrBridge()->AllocExternalImageIdForCompositable(mImageClient));
  }

  AutoLockImage autoLock(mContainer);
  Image* image = autoLock.GetImage();
  if (!image) {
    return Nothing();
  }

  MOZ_ASSERT(mImageClient->AsImageClientSingle());
  mKey = UpdateImageKey(mImageClient->AsImageClientSingle(),
                        mContainer,
                        mKey,
                        mExternalImageId.ref());
  if (mKey.isNothing()) {
    return Nothing();
  }

  gfx::IntSize size = image->GetSize();
  wr::WrImageMask imageMask;
  imageMask.image = mKey.value();
  Rect maskRect = aTransform.TransformBounds(Rect(0, 0, size.width, size.height));
  imageMask.rect = aSc.ToRelativeLayoutRect(ViewAs<LayerPixel>(maskRect));
  imageMask.repeat = false;
  return Some(imageMask);
}

gfx::IntRect
ComputeBackdropCopyRect(const gfx::Rect& aRect,
                        const gfx::IntRect& aClipRect,
                        const gfx::Matrix4x4& aTransform,
                        const gfx::IntRect& aRenderTargetRect,
                        gfx::Matrix4x4* aOutTransform,
                        gfx::Rect* aOutLayerQuad)
{
  // Compute the clip.
  IntPoint rtOffset = aRenderTargetRect.TopLeft();
  IntSize rtSize = aRenderTargetRect.Size();

  gfx::IntRect renderBounds(0, 0, rtSize.width, rtSize.height);
  renderBounds.IntersectRect(renderBounds, aClipRect);
  renderBounds.MoveBy(rtOffset);

  // Apply the layer transform.
  RectDouble dest = aTransform.TransformAndClipBounds(
    RectDouble(aRect.x, aRect.y, aRect.width, aRect.height),
    RectDouble(renderBounds.x, renderBounds.y, renderBounds.width, renderBounds.height));
  dest -= rtOffset;

  // Ensure we don't round out to -1, which trips up Direct3D.
  dest.IntersectRect(dest, RectDouble(0, 0, rtSize.width, rtSize.height));

  if (aOutLayerQuad) {
    *aOutLayerQuad = Rect(dest.x, dest.y, dest.width, dest.height);
  }

  // Round out to integer.
  IntRect result;
  dest.RoundOut();
  dest.ToIntRect(&result);

  // Create a transform from adjusted clip space to render target space,
  // translate it for the backdrop rect, then transform it into the backdrop's
  // uv-space.
  Matrix4x4 transform;
  transform.PostScale(rtSize.width, rtSize.height, 1.0);
  transform.PostTranslate(-result.x, -result.y, 0.0);
  transform.PostScale(1 / float(result.width), 1 / float(result.height), 1.0);
  *aOutTransform = transform;
  return result;
}

gfx::IntRect
Compositor::ComputeBackdropCopyRect(const gfx::Rect& aRect,
                                    const gfx::Rect& aClipRect,
                                    const gfx::Matrix4x4& aTransform)
{
  gfx::Rect renderBounds = mRenderBounds;

  // Compute the clip.
  gfx::IntPoint offset = GetCurrentRenderTarget()->GetOrigin();
  renderBounds.IntersectRect(renderBounds, aClipRect);
  renderBounds.MoveBy(offset);

  // Apply the layer transform.
  gfx::Rect dest = aTransform.TransformAndClipBounds(aRect, renderBounds);
  dest -= offset;

  // Round out to integer.
  gfx::IntRect result;
  dest.RoundOut();
  dest.ToIntRect(&result);
  return result;
}

void
TiledContentHost::RenderLayerBuffer(TiledLayerBufferComposite& aLayerBuffer,
                                    const nsIntRegion& aValidRegion,
                                    EffectChain& aEffectChain,
                                    float aOpacity,
                                    const gfx::Point& aOffset,
                                    const gfx::Filter& aFilter,
                                    const gfx::Rect& aClipRect,
                                    const nsIntRegion& aMaskRegion,
                                    nsIntRect aVisibleRect,
                                    gfx::Matrix4x4 aTransform)
{
  float resolution = aLayerBuffer.GetResolution();
  gfxSize layerScale(1, 1);
  // We assume that the current frame resolution is the one used in our primary
  // layer buffer. Compensate for a changing frame resolution.
  if (aLayerBuffer.GetFrameResolution() != mVideoMemoryTiledBuffer.GetFrameResolution()) {
    const gfxSize& layerResolution = aLayerBuffer.GetFrameResolution();
    const gfxSize& localResolution = mVideoMemoryTiledBuffer.GetFrameResolution();
    layerScale.width = layerResolution.width / localResolution.width;
    layerScale.height = layerResolution.height / localResolution.height;
    aVisibleRect.ScaleRoundOut(layerScale.width, layerScale.height);
  }
  aTransform.Scale(1/(resolution * layerScale.width),
                   1/(resolution * layerScale.height), 1);

  uint32_t rowCount = 0;
  uint32_t tileX = 0;
  for (int32_t x = aVisibleRect.x; x < aVisibleRect.x + aVisibleRect.width;) {
    rowCount++;
    int32_t tileStartX = aLayerBuffer.GetTileStart(x);
    int32_t w = aLayerBuffer.GetScaledTileLength() - tileStartX;
    if (x + w > aVisibleRect.x + aVisibleRect.width) {
      w = aVisibleRect.x + aVisibleRect.width - x;
    }
    int tileY = 0;
    for (int32_t y = aVisibleRect.y; y < aVisibleRect.y + aVisibleRect.height;) {
      int32_t tileStartY = aLayerBuffer.GetTileStart(y);
      int32_t h = aLayerBuffer.GetScaledTileLength() - tileStartY;
      if (y + h > aVisibleRect.y + aVisibleRect.height) {
        h = aVisibleRect.y + aVisibleRect.height - y;
      }

      TiledTexture tileTexture = aLayerBuffer.
        GetTile(nsIntPoint(aLayerBuffer.RoundDownToTileEdge(x),
                           aLayerBuffer.RoundDownToTileEdge(y)));
      if (tileTexture != aLayerBuffer.GetPlaceholderTile()) {
        nsIntRegion tileDrawRegion;
        tileDrawRegion.And(aValidRegion,
                           nsIntRect(x * layerScale.width,
                                     y * layerScale.height,
                                     w * layerScale.width,
                                     h * layerScale.height));
        tileDrawRegion.Sub(tileDrawRegion, aMaskRegion);

        if (!tileDrawRegion.IsEmpty()) {
          tileDrawRegion.ScaleRoundOut(resolution / layerScale.width,
                                       resolution / layerScale.height);

          nsIntPoint tileOffset((x - tileStartX) * resolution,
                                (y - tileStartY) * resolution);
          uint32_t tileSize = aLayerBuffer.GetTileLength();
          RenderTile(tileTexture, aEffectChain, aOpacity, aTransform, aOffset, aFilter, aClipRect, tileDrawRegion,
                     tileOffset, nsIntSize(tileSize, tileSize));
        }
      }
      tileY++;
      y += h;
    }
    tileX++;
    x += w;
  }
}

void
CompositorOGL::DrawVRDistortion(const gfx::Rect& aRect,
                                const gfx::Rect& aClipRect,
                                const EffectChain& aEffectChain,
                                gfx::Float aOpacity,
                                const gfx::Matrix4x4& aTransform)
{
  MOZ_ASSERT(aEffectChain.mPrimaryEffect->mType == EffectTypes::VR_DISTORTION);
  MOZ_ASSERT(mVR.mInitialized);

  if (aEffectChain.mSecondaryEffects[EffectTypes::MASK] ||
      aEffectChain.mSecondaryEffects[EffectTypes::BLEND_MODE])
  {
    NS_WARNING("DrawVRDistortion: ignoring secondary effect!");
  }

  EffectVRDistortion* vrEffect =
    static_cast<EffectVRDistortion*>(aEffectChain.mPrimaryEffect.get());

  GLenum textureTarget = LOCAL_GL_TEXTURE_2D;
  if (vrEffect->mRenderTarget)
    textureTarget = mFBOTextureTarget;

  RefPtr<CompositingRenderTargetOGL> surface =
    static_cast<CompositingRenderTargetOGL*>(vrEffect->mRenderTarget.get());

  VRHMDInfo* hmdInfo = vrEffect->mHMD;
  VRDistortionConstants shaderConstants;

  if (hmdInfo->GetConfiguration() != mVR.mConfiguration) {
    for (uint32_t eye = 0; eye < 2; eye++) {
      const gfx::VRDistortionMesh& mesh = hmdInfo->GetDistortionMesh(eye);
      gl()->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, mVR.mDistortionVertices[eye]);
      gl()->fBufferData(LOCAL_GL_ARRAY_BUFFER,
                       mesh.mVertices.Length() * sizeof(gfx::VRDistortionVertex),
                       mesh.mVertices.Elements(),
                       LOCAL_GL_STATIC_DRAW);

      gl()->fBindBuffer(LOCAL_GL_ELEMENT_ARRAY_BUFFER, mVR.mDistortionIndices[eye]);
      gl()->fBufferData(LOCAL_GL_ELEMENT_ARRAY_BUFFER,
                       mesh.mIndices.Length() * sizeof(uint16_t),
                       mesh.mIndices.Elements(),
                       LOCAL_GL_STATIC_DRAW);

      mVR.mDistortionIndexCount[eye] = mesh.mIndices.Length();
    }

    mVR.mConfiguration = hmdInfo->GetConfiguration();
  }

  int programIndex = textureTarget == LOCAL_GL_TEXTURE_2D ? 0 : 1;

  gl()->fScissor(aClipRect.x, FlipY(aClipRect.y + aClipRect.height),
                 aClipRect.width, aClipRect.height);

  // Clear out the entire area that we want to render; this ensures that
  // the layer will be opaque, even though the mesh geometry we'll be
  // drawing below won't cover the full rectangle.
  gl()->fClearColor(0.0, 0.0, 0.0, 1.0);
  gl()->fClear(LOCAL_GL_COLOR_BUFFER_BIT | LOCAL_GL_DEPTH_BUFFER_BIT);

  // Make sure that the cached current program is reset for the
  // rest of the compositor, since we're using a custom program here
  ResetProgram();

  gl()->fUseProgram(mVR.mDistortionProgram[programIndex]);

  gl()->fEnableVertexAttribArray(mVR.mAPosition);
  gl()->fEnableVertexAttribArray(mVR.mATexCoord0);
  gl()->fEnableVertexAttribArray(mVR.mATexCoord1);
  gl()->fEnableVertexAttribArray(mVR.mATexCoord2);
  gl()->fEnableVertexAttribArray(mVR.mAGenericAttribs);

  surface->BindTexture(LOCAL_GL_TEXTURE0, mFBOTextureTarget);
  gl()->fUniform1i(mVR.mUTexture[programIndex], 0);

  Rect destRect = aTransform.TransformBounds(aRect);
  gfx::IntSize preDistortionSize = surface->GetInitSize(); // XXX source->GetSize()
  gfx::Size vpSize = destRect.Size();

  for (uint32_t eye = 0; eye < 2; eye++) {
    gfx::IntRect eyeViewport;
    eyeViewport.x = eye * preDistortionSize.width / 2;
    eyeViewport.y = 0;
    eyeViewport.width = preDistortionSize.width / 2;
    eyeViewport.height = preDistortionSize.height;

    hmdInfo->FillDistortionConstants(eye,
                                     preDistortionSize, eyeViewport,
                                     vpSize, destRect,
                                     shaderConstants);

    float height = 1.0f;
    float texScaleAndOffset[4] = { shaderConstants.eyeToSourceScaleAndOffset[0],
                                   shaderConstants.eyeToSourceScaleAndOffset[1],
                                   shaderConstants.eyeToSourceScaleAndOffset[2],
                                   shaderConstants.eyeToSourceScaleAndOffset[3] };
    if (textureTarget == LOCAL_GL_TEXTURE_RECTANGLE_ARB) {
      texScaleAndOffset[0] *= preDistortionSize.width;
      texScaleAndOffset[1] *= preDistortionSize.height;
//.........这里部分代码省略.........

void
BasicCompositor::DrawQuad(const gfx::Rect& aRect,
                          const gfx::Rect& aClipRect,
                          const EffectChain &aEffectChain,
                          gfx::Float aOpacity,
                          const gfx::Matrix4x4& aTransform,
                          const gfx::Rect& aVisibleRect)
{
  RefPtr<DrawTarget> buffer = mRenderTarget->mDrawTarget;

  // For 2D drawing, |dest| and |buffer| are the same surface. For 3D drawing,
  // |dest| is a temporary surface.
  RefPtr<DrawTarget> dest = buffer;

  buffer->PushClipRect(aClipRect);
  AutoRestoreTransform autoRestoreTransform(dest);

  Matrix newTransform;
  Rect transformBounds;
  gfx3DMatrix new3DTransform;
  IntPoint offset = mRenderTarget->GetOrigin();

  if (aTransform.Is2D()) {
    newTransform = aTransform.As2D();
  } else {
    // Create a temporary surface for the transform.
    dest = gfxPlatform::GetPlatform()->CreateOffscreenContentDrawTarget(RoundOut(aRect).Size(), SurfaceFormat::B8G8R8A8);
    if (!dest) {
      return;
    }

    dest->SetTransform(Matrix::Translation(-aRect.x, -aRect.y));

    // Get the bounds post-transform.
    new3DTransform = To3DMatrix(aTransform);
    gfxRect bounds = new3DTransform.TransformBounds(ThebesRect(aRect));
    bounds.IntersectRect(bounds, gfxRect(offset.x, offset.y, buffer->GetSize().width, buffer->GetSize().height));

    transformBounds = ToRect(bounds);
    transformBounds.RoundOut();

    // Propagate the coordinate offset to our 2D draw target.
    newTransform = Matrix::Translation(transformBounds.x, transformBounds.y);

    // When we apply the 3D transformation, we do it against a temporary
    // surface, so undo the coordinate offset.
    new3DTransform = gfx3DMatrix::Translation(aRect.x, aRect.y, 0) * new3DTransform;
  }

  newTransform.PostTranslate(-offset.x, -offset.y);
  buffer->SetTransform(newTransform);

  RefPtr<SourceSurface> sourceMask;
  Matrix maskTransform;
  if (aEffectChain.mSecondaryEffects[EffectTypes::MASK]) {
    EffectMask *effectMask = static_cast<EffectMask*>(aEffectChain.mSecondaryEffects[EffectTypes::MASK].get());
    sourceMask = effectMask->mMaskTexture->AsSourceBasic()->GetSurface(dest);
    MOZ_ASSERT(effectMask->mMaskTransform.Is2D(), "How did we end up with a 3D transform here?!");
    MOZ_ASSERT(!effectMask->mIs3D);
    maskTransform = effectMask->mMaskTransform.As2D();
    maskTransform.PreTranslate(-offset.x, -offset.y);
  }

  switch (aEffectChain.mPrimaryEffect->mType) {
    case EffectTypes::SOLID_COLOR: {
      EffectSolidColor* effectSolidColor =
        static_cast<EffectSolidColor*>(aEffectChain.mPrimaryEffect.get());

      FillRectWithMask(dest, aRect, effectSolidColor->mColor,
                       DrawOptions(aOpacity), sourceMask, &maskTransform);
      break;
    }
    case EffectTypes::RGB: {
      TexturedEffect* texturedEffect =
          static_cast<TexturedEffect*>(aEffectChain.mPrimaryEffect.get());
      TextureSourceBasic* source = texturedEffect->mTexture->AsSourceBasic();

      if (texturedEffect->mPremultiplied) {
          DrawSurfaceWithTextureCoords(dest, aRect,
                                       source->GetSurface(dest),
                                       texturedEffect->mTextureCoords,
                                       texturedEffect->mFilter,
                                       aOpacity, sourceMask, &maskTransform);
      } else {
          RefPtr<DataSourceSurface> srcData = source->GetSurface(dest)->GetDataSurface();

          // Yes, we re-create the premultiplied data every time.
          // This might be better with a cache, eventually.
          RefPtr<DataSourceSurface> premultData = gfxUtils::CreatePremultipliedDataSurface(srcData);

          DrawSurfaceWithTextureCoords(dest, aRect,
                                       premultData,
                                       texturedEffect->mTextureCoords,
                                       texturedEffect->mFilter,
                                       aOpacity, sourceMask, &maskTransform);
      }
      break;
    }
    case EffectTypes::YCBCR: {
      NS_RUNTIMEABORT("Can't (easily) support component alpha with BasicCompositor!");
//.........这里部分代码省略.........

void
CompositorD3D11::DrawQuad(const gfx::Rect& aRect,
                          const gfx::Rect& aClipRect,
                          const EffectChain& aEffectChain,
                          gfx::Float aOpacity,
                          const gfx::Matrix4x4& aTransform)
{
  MOZ_ASSERT(mCurrentRT, "No render target");
  memcpy(&mVSConstants.layerTransform, &aTransform._11, 64);
  IntPoint origin = mCurrentRT->GetOrigin();
  mVSConstants.renderTargetOffset[0] = origin.x;
  mVSConstants.renderTargetOffset[1] = origin.y;

  mPSConstants.layerOpacity[0] = aOpacity;

  bool restoreBlendMode = false;

  MaskType maskType = MaskType::MaskNone;

  if (aEffectChain.mSecondaryEffects[EffectTypes::MASK]) {
    if (aTransform.Is2D()) {
      maskType = MaskType::Mask2d;
    } else {
      MOZ_ASSERT(aEffectChain.mPrimaryEffect->mType == EffectTypes::RGB);
      maskType = MaskType::Mask3d;
    }

    EffectMask* maskEffect =
      static_cast<EffectMask*>(aEffectChain.mSecondaryEffects[EffectTypes::MASK].get());
    TextureSourceD3D11* source = maskEffect->mMaskTexture->AsSourceD3D11();

    if (!source) {
      NS_WARNING("Missing texture source!");
      return;
    }

    RefPtr<ID3D11ShaderResourceView> view;
    HRESULT hr = mDevice->CreateShaderResourceView(source->GetD3D11Texture(), nullptr, byRef(view));
    if (Failed(hr)) {
      // XXX - There's a chance we won't be able to render anything, should we
      // just crash release builds?
      return;
    }

    ID3D11ShaderResourceView* srView = view;
    mContext->PSSetShaderResources(3, 1, &srView);

    const gfx::Matrix4x4& maskTransform = maskEffect->mMaskTransform;
    NS_ASSERTION(maskTransform.Is2D(), "How did we end up with a 3D transform here?!");
    Rect bounds = Rect(Point(), Size(maskEffect->mSize));

    mVSConstants.maskQuad = maskTransform.As2D().TransformBounds(bounds);
  }


  D3D11_RECT scissor;
  scissor.left = aClipRect.x;
  scissor.right = aClipRect.XMost();
  scissor.top = aClipRect.y;
  scissor.bottom = aClipRect.YMost();
  mContext->RSSetScissorRects(1, &scissor);
  mContext->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP);
  mContext->VSSetShader(mAttachments->mVSQuadShader[maskType], nullptr, 0);

  const Rect* pTexCoordRect = nullptr;

  switch (aEffectChain.mPrimaryEffect->mType) {
  case EffectTypes::SOLID_COLOR: {
      SetPSForEffect(aEffectChain.mPrimaryEffect, maskType, SurfaceFormat::UNKNOWN);

      Color color =
        static_cast<EffectSolidColor*>(aEffectChain.mPrimaryEffect.get())->mColor;
      mPSConstants.layerColor[0] = color.r * color.a * aOpacity;
      mPSConstants.layerColor[1] = color.g * color.a * aOpacity;
      mPSConstants.layerColor[2] = color.b * color.a * aOpacity;
      mPSConstants.layerColor[3] = color.a * aOpacity;
    }
    break;
  case EffectTypes::RGB:
  case EffectTypes::RENDER_TARGET:
    {
      TexturedEffect* texturedEffect =
        static_cast<TexturedEffect*>(aEffectChain.mPrimaryEffect.get());

      pTexCoordRect = &texturedEffect->mTextureCoords;

      TextureSourceD3D11* source = texturedEffect->mTexture->AsSourceD3D11();

      if (!source) {
        NS_WARNING("Missing texture source!");
        return;
      }

      SetPSForEffect(aEffectChain.mPrimaryEffect, maskType, texturedEffect->mTexture->GetFormat());

      RefPtr<ID3D11ShaderResourceView> view;
      HRESULT hr = mDevice->CreateShaderResourceView(source->GetD3D11Texture(), nullptr, byRef(view));
      if (Failed(hr)) {
        // XXX - There's a chance we won't be able to render anything, should we
        // just crash release builds?
//.........这里部分代码省略.........

void
CompositorD3D9::DrawQuad(const gfx::Rect &aRect,
                         const gfx::Rect &aClipRect,
                         const EffectChain &aEffectChain,
                         gfx::Float aOpacity,
                         const gfx::Matrix4x4 &aTransform)
{
  if (!mDeviceManager) {
    return;
  }

  IDirect3DDevice9* d3d9Device = device();
  MOZ_ASSERT(d3d9Device, "We should be able to get a device now");

  MOZ_ASSERT(mCurrentRT, "No render target");
  d3d9Device->SetVertexShaderConstantF(CBmLayerTransform, &aTransform._11, 4);

  IntPoint origin = mCurrentRT->GetOrigin();
  float renderTargetOffset[] = { origin.x, origin.y, 0, 0 };
  d3d9Device->SetVertexShaderConstantF(CBvRenderTargetOffset,
                                       renderTargetOffset,
                                       1);
  d3d9Device->SetVertexShaderConstantF(CBvLayerQuad,
                                       ShaderConstantRect(aRect.x,
                                                          aRect.y,
                                                          aRect.width,
                                                          aRect.height),
                                       1);
  bool target = false;

  if (aEffectChain.mPrimaryEffect->mType != EffectTypes::SOLID_COLOR) {
    float opacity[4];
    /*
     * We always upload a 4 component float, but the shader will use only the
     * first component since it's declared as a 'float'.
     */
    opacity[0] = aOpacity;
    d3d9Device->SetPixelShaderConstantF(CBfLayerOpacity, opacity, 1);
  }

  bool isPremultiplied = true;

  MaskType maskType = MaskType::MaskNone;

  if (aEffectChain.mSecondaryEffects[EffectTypes::MASK]) {
    if (aTransform.Is2D()) {
      maskType = MaskType::Mask2d;
    } else {
      maskType = MaskType::Mask3d;
    }
  }

  RECT scissor;
  scissor.left = aClipRect.x;
  scissor.right = aClipRect.XMost();
  scissor.top = aClipRect.y;
  scissor.bottom = aClipRect.YMost();
  d3d9Device->SetScissorRect(&scissor);

  uint32_t maskTexture = 0;
  switch (aEffectChain.mPrimaryEffect->mType) {
  case EffectTypes::SOLID_COLOR:
    {
      // output color is premultiplied, so we need to adjust all channels.
      Color layerColor =
        static_cast<EffectSolidColor*>(aEffectChain.mPrimaryEffect.get())->mColor;
      float color[4];
      color[0] = layerColor.r * layerColor.a * aOpacity;
      color[1] = layerColor.g * layerColor.a * aOpacity;
      color[2] = layerColor.b * layerColor.a * aOpacity;
      color[3] = layerColor.a * aOpacity;

      d3d9Device->SetPixelShaderConstantF(CBvColor, color, 1);

      maskTexture = mDeviceManager
        ->SetShaderMode(DeviceManagerD3D9::SOLIDCOLORLAYER, maskType);
    }
    break;
  case EffectTypes::RENDER_TARGET:
  case EffectTypes::RGB:
    {
      TexturedEffect* texturedEffect =
        static_cast<TexturedEffect*>(aEffectChain.mPrimaryEffect.get());

      Rect textureCoords = texturedEffect->mTextureCoords;
      d3d9Device->SetVertexShaderConstantF(CBvTextureCoords,
                                           ShaderConstantRect(
                                             textureCoords.x,
                                             textureCoords.y,
                                             textureCoords.width,
                                             textureCoords.height),
                                           1);

      SetSamplerForFilter(texturedEffect->mFilter);

      TextureSourceD3D9* source = texturedEffect->mTexture->AsSourceD3D9();
      d3d9Device->SetTexture(0, source->GetD3D9Texture());

      maskTexture = mDeviceManager
        ->SetShaderMode(ShaderModeForEffectType(aEffectChain.mPrimaryEffect->mType,
//.........这里部分代码省略.........

void
CompositorD3D11::DrawQuad(const gfx::Rect& aRect,
                          const gfx::Rect& aClipRect,
                          const EffectChain& aEffectChain,
                          gfx::Float aOpacity,
                          const gfx::Matrix4x4& aTransform,
                          const gfx::Point& aOffset)
{
  MOZ_ASSERT(mCurrentRT, "No render target");
  memcpy(&mVSConstants.layerTransform, &aTransform._11, 64);
  mVSConstants.renderTargetOffset[0] = aOffset.x;
  mVSConstants.renderTargetOffset[1] = aOffset.y;
  mVSConstants.layerQuad = aRect;

  mPSConstants.layerOpacity[0] = aOpacity;

  bool restoreBlendMode = false;

  MaskType maskType = MaskNone;

  if (aEffectChain.mSecondaryEffects[EFFECT_MASK]) {
    if (aTransform.Is2D()) {
      maskType = Mask2d;
    } else {
      MOZ_ASSERT(aEffectChain.mPrimaryEffect->mType == EFFECT_BGRA);
      maskType = Mask3d;
    }

    EffectMask* maskEffect =
      static_cast<EffectMask*>(aEffectChain.mSecondaryEffects[EFFECT_MASK].get());
    TextureSourceD3D11* source = maskEffect->mMaskTexture->AsSourceD3D11();

    RefPtr<ID3D11ShaderResourceView> view;
    mDevice->CreateShaderResourceView(source->GetD3D11Texture(), nullptr, byRef(view));

    ID3D11ShaderResourceView* srView = view;
    mContext->PSSetShaderResources(3, 1, &srView);

    const gfx::Matrix4x4& maskTransform = maskEffect->mMaskTransform;
    NS_ASSERTION(maskTransform.Is2D(), "How did we end up with a 3D transform here?!");
    Rect bounds = Rect(Point(), Size(maskEffect->mSize));

    mVSConstants.maskQuad = maskTransform.As2D().TransformBounds(bounds);
  }


  D3D11_RECT scissor;
  scissor.left = aClipRect.x;
  scissor.right = aClipRect.XMost();
  scissor.top = aClipRect.y;
  scissor.bottom = aClipRect.YMost();
  mContext->RSSetScissorRects(1, &scissor);
  mContext->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP);
  mContext->VSSetShader(mAttachments->mVSQuadShader[maskType], nullptr, 0);

  SetPSForEffect(aEffectChain.mPrimaryEffect, maskType);

  switch (aEffectChain.mPrimaryEffect->mType) {
  case EFFECT_SOLID_COLOR: {
      Color color =
        static_cast<EffectSolidColor*>(aEffectChain.mPrimaryEffect.get())->mColor;
      mPSConstants.layerColor[0] = color.r * color.a * aOpacity;
      mPSConstants.layerColor[1] = color.g * color.a * aOpacity;
      mPSConstants.layerColor[2] = color.b * color.a * aOpacity;
      mPSConstants.layerColor[3] = color.a * aOpacity;
    }
    break;
  case EFFECT_BGRX:
  case EFFECT_BGRA:
  case EFFECT_RENDER_TARGET:
    {
      TexturedEffect* texturedEffect =
        static_cast<TexturedEffect*>(aEffectChain.mPrimaryEffect.get());

      mVSConstants.textureCoords = texturedEffect->mTextureCoords;

      TextureSourceD3D11* source = texturedEffect->mTexture->AsSourceD3D11();

      RefPtr<ID3D11ShaderResourceView> view;
      mDevice->CreateShaderResourceView(source->GetD3D11Texture(), nullptr, byRef(view));

      ID3D11ShaderResourceView* srView = view;
      mContext->PSSetShaderResources(0, 1, &srView);

      if (!texturedEffect->mPremultiplied) {
        mContext->OMSetBlendState(mAttachments->mNonPremulBlendState, sBlendFactor, 0xFFFFFFFF);
        restoreBlendMode = true;
      }

      SetSamplerForFilter(texturedEffect->mFilter);
    }
    break;
  case EFFECT_YCBCR: {
      EffectYCbCr* ycbcrEffect =
        static_cast<EffectYCbCr*>(aEffectChain.mPrimaryEffect.get());

      SetSamplerForFilter(FILTER_LINEAR);

      mVSConstants.textureCoords = ycbcrEffect->mTextureCoords;

//.........这里部分代码省略.........

void
TiledContentHost::RenderLayerBuffer(TiledLayerBufferComposite& aLayerBuffer,
                                    const gfxRGBA* aBackgroundColor,
                                    EffectChain& aEffectChain,
                                    float aOpacity,
                                    const gfx::Filter& aFilter,
                                    const gfx::Rect& aClipRect,
                                    nsIntRegion aVisibleRegion,
                                    gfx::Matrix4x4 aTransform)
{
  if (!mCompositor) {
    NS_WARNING("Can't render tiled content host - no compositor");
    return;
  }
  float resolution = aLayerBuffer.GetResolution();
  gfx::Size layerScale(1, 1);

  // We assume that the current frame resolution is the one used in our high
  // precision layer buffer. Compensate for a changing frame resolution when
  // rendering the low precision buffer.
  if (aLayerBuffer.GetFrameResolution() != mTiledBuffer.GetFrameResolution()) {
    const CSSToParentLayerScale& layerResolution = aLayerBuffer.GetFrameResolution();
    const CSSToParentLayerScale& localResolution = mTiledBuffer.GetFrameResolution();
    layerScale.width = layerScale.height = layerResolution.scale / localResolution.scale;
    aVisibleRegion.ScaleRoundOut(layerScale.width, layerScale.height);
  }

  // If we're drawing the low precision buffer, make sure the high precision
  // buffer is masked out to avoid overdraw and rendering artifacts with
  // non-opaque layers.
  nsIntRegion maskRegion;
  if (resolution != mTiledBuffer.GetResolution()) {
    maskRegion = mTiledBuffer.GetValidRegion();
    // XXX This should be ScaleRoundIn, but there is no such function on
    //     nsIntRegion.
    maskRegion.ScaleRoundOut(layerScale.width, layerScale.height);
  }

  // Make sure the resolution and difference in frame resolution are accounted
  // for in the layer transform.
  aTransform.PreScale(1/(resolution * layerScale.width),
                      1/(resolution * layerScale.height), 1);

  uint32_t rowCount = 0;
  uint32_t tileX = 0;
  nsIntRect visibleRect = aVisibleRegion.GetBounds();
  gfx::IntSize scaledTileSize = aLayerBuffer.GetScaledTileSize();
  for (int32_t x = visibleRect.x; x < visibleRect.x + visibleRect.width;) {
    rowCount++;
    int32_t tileStartX = aLayerBuffer.GetTileStart(x, scaledTileSize.width);
    int32_t w = scaledTileSize.width - tileStartX;
    if (x + w > visibleRect.x + visibleRect.width) {
      w = visibleRect.x + visibleRect.width - x;
    }
    int tileY = 0;
    for (int32_t y = visibleRect.y; y < visibleRect.y + visibleRect.height;) {
      int32_t tileStartY = aLayerBuffer.GetTileStart(y, scaledTileSize.height);
      int32_t h = scaledTileSize.height - tileStartY;
      if (y + h > visibleRect.y + visibleRect.height) {
        h = visibleRect.y + visibleRect.height - y;
      }

      TileHost tileTexture = aLayerBuffer.
        GetTile(nsIntPoint(aLayerBuffer.RoundDownToTileEdge(x, scaledTileSize.width),
                           aLayerBuffer.RoundDownToTileEdge(y, scaledTileSize.height)));
      if (tileTexture != aLayerBuffer.GetPlaceholderTile()) {
        nsIntRegion tileDrawRegion;
        tileDrawRegion.And(nsIntRect(x, y, w, h), aLayerBuffer.GetValidRegion());
        tileDrawRegion.And(tileDrawRegion, aVisibleRegion);
        tileDrawRegion.Sub(tileDrawRegion, maskRegion);

        if (!tileDrawRegion.IsEmpty()) {
          tileDrawRegion.ScaleRoundOut(resolution, resolution);
          nsIntPoint tileOffset((x - tileStartX) * resolution,
                                (y - tileStartY) * resolution);
          gfx::IntSize tileSize = aLayerBuffer.GetTileSize();
          RenderTile(tileTexture, aBackgroundColor, aEffectChain, aOpacity, aTransform,
                     aFilter, aClipRect, tileDrawRegion, tileOffset,
                     nsIntSize(tileSize.width, tileSize.height));
        }
      }
      tileY++;
      y += h;
    }
    tileX++;
    x += w;
  }
  gfx::Rect rect(visibleRect.x, visibleRect.y,
                 visibleRect.width, visibleRect.height);
  GetCompositor()->DrawDiagnostics(DiagnosticFlags::CONTENT,
                                   rect, aClipRect, aTransform, mFlashCounter);
}

void
TiledContentHost::RenderLayerBuffer(TiledLayerBufferComposite& aLayerBuffer,
                                    const gfxRGBA* aBackgroundColor,
                                    EffectChain& aEffectChain,
                                    float aOpacity,
                                    const gfx::Filter& aFilter,
                                    const gfx::Rect& aClipRect,
                                    nsIntRegion aVisibleRegion,
                                    gfx::Matrix4x4 aTransform)
{
  if (!mCompositor) {
    NS_WARNING("Can't render tiled content host - no compositor");
    return;
  }
  float resolution = aLayerBuffer.GetResolution();
  gfx::Size layerScale(1, 1);

  // We assume that the current frame resolution is the one used in our high
  // precision layer buffer. Compensate for a changing frame resolution when
  // rendering the low precision buffer.
  if (aLayerBuffer.GetFrameResolution() != mTiledBuffer.GetFrameResolution()) {
    const CSSToParentLayerScale2D& layerResolution = aLayerBuffer.GetFrameResolution();
    const CSSToParentLayerScale2D& localResolution = mTiledBuffer.GetFrameResolution();
    layerScale.width = layerResolution.xScale / localResolution.xScale;
    layerScale.height = layerResolution.yScale / localResolution.yScale;
    aVisibleRegion.ScaleRoundOut(layerScale.width, layerScale.height);
  }

  // Make sure we don't render at low resolution where we have valid high
  // resolution content, to avoid overdraw and artifacts with semi-transparent
  // layers.
  nsIntRegion maskRegion;
  if (resolution != mTiledBuffer.GetResolution()) {
    maskRegion = mTiledBuffer.GetValidRegion();
    // XXX This should be ScaleRoundIn, but there is no such function on
    //     nsIntRegion.
    maskRegion.ScaleRoundOut(layerScale.width, layerScale.height);
  }

  // Make sure the resolution and difference in frame resolution are accounted
  // for in the layer transform.
  aTransform.PreScale(1/(resolution * layerScale.width),
                      1/(resolution * layerScale.height), 1);

  DiagnosticFlags componentAlphaDiagnostic = DiagnosticFlags::NO_DIAGNOSTIC;

  nsIntRegion compositeRegion = aLayerBuffer.GetValidRegion();
  compositeRegion.AndWith(aVisibleRegion);
  compositeRegion.SubOut(maskRegion);

  IntRect visibleRect = aVisibleRegion.GetBounds();

  if (compositeRegion.IsEmpty()) {
    return;
  }

  if (aBackgroundColor) {
    nsIntRegion backgroundRegion = compositeRegion;
    backgroundRegion.ScaleRoundOut(resolution, resolution);
    EffectChain effect;
    effect.mPrimaryEffect = new EffectSolidColor(ToColor(*aBackgroundColor));
    nsIntRegionRectIterator it(backgroundRegion);
    for (const IntRect* rect = it.Next(); rect != nullptr; rect = it.Next()) {
      Rect graphicsRect(rect->x, rect->y, rect->width, rect->height);
      mCompositor->DrawQuad(graphicsRect, aClipRect, effect, 1.0, aTransform);
    }
  }

  for (size_t i = 0; i < aLayerBuffer.GetTileCount(); ++i) {
    TileHost& tile = aLayerBuffer.GetTile(i);
    if (tile.IsPlaceholderTile()) {
      continue;
    }

    TileIntPoint tilePosition = aLayerBuffer.GetPlacement().TilePosition(i);
    // A sanity check that catches a lot of mistakes.
    MOZ_ASSERT(tilePosition.x == tile.mTilePosition.x && tilePosition.y == tile.mTilePosition.y);

    IntPoint tileOffset = aLayerBuffer.GetTileOffset(tilePosition);
    nsIntRegion tileDrawRegion = IntRect(tileOffset, aLayerBuffer.GetScaledTileSize());
    tileDrawRegion.AndWith(compositeRegion);

    if (tileDrawRegion.IsEmpty()) {
      continue;
    }

    tileDrawRegion.ScaleRoundOut(resolution, resolution);
    RenderTile(tile, aEffectChain, aOpacity,
               aTransform, aFilter, aClipRect, tileDrawRegion,
               tileOffset * resolution, aLayerBuffer.GetTileSize(),
               gfx::Rect(visibleRect.x, visibleRect.y,
                         visibleRect.width, visibleRect.height));
    if (tile.mTextureHostOnWhite) {
      componentAlphaDiagnostic = DiagnosticFlags::COMPONENT_ALPHA;
    }
  }

  gfx::Rect rect(visibleRect.x, visibleRect.y,
                 visibleRect.width, visibleRect.height);
  GetCompositor()->DrawDiagnostics(DiagnosticFlags::CONTENT | componentAlphaDiagnostic,
//.........这里部分代码省略.........