C++ SharedSurface::Size方法代码示例

void
CopyableCanvasLayer::UpdateSurface(gfxASurface* aDestSurface, Layer* aMaskLayer)
{
  if (!IsDirty())
    return;
  Painted();

  if (mDrawTarget) {
    mDrawTarget->Flush();
    if (mDrawTarget->GetType() == BACKEND_COREGRAPHICS_ACCELERATED) {
      // We have an accelerated CG context which has changed, unlike a bitmap surface
      // where we can alias the bits on initializing the mDrawTarget, we need to readback
      // and copy the accelerated surface each frame. We want to support this for quick
      // thumbnail but if we're going to be doing this every frame it likely is better
      // to use a non accelerated (bitmap) canvas.
      mSurface = gfxPlatform::GetPlatform()->GetThebesSurfaceForDrawTarget(mDrawTarget);
    }
  }

  if (!mGLContext && aDestSurface) {
    nsRefPtr<gfxContext> tmpCtx = new gfxContext(aDestSurface);
    tmpCtx->SetOperator(gfxContext::OPERATOR_SOURCE);
    CopyableCanvasLayer::PaintWithOpacity(tmpCtx, 1.0f, aMaskLayer);
    return;
  }

  if (mGLContext) {
    if (aDestSurface && aDestSurface->GetType() != gfxASurface::SurfaceTypeImage) {
      MOZ_ASSERT(false, "Destination surface must be ImageSurface type.");
      return;
    }

    nsRefPtr<gfxImageSurface> readSurf;
    nsRefPtr<gfxImageSurface> resultSurf;

    SharedSurface* sharedSurf = mGLContext->RequestFrame();
    if (!sharedSurf) {
      NS_WARNING("Null frame received.");
      return;
    }

    gfxIntSize readSize(sharedSurf->Size());
    gfxImageFormat format = (GetContentFlags() & CONTENT_OPAQUE)
                            ? gfxASurface::ImageFormatRGB24
                            : gfxASurface::ImageFormatARGB32;

    if (aDestSurface) {
      resultSurf = static_cast<gfxImageSurface*>(aDestSurface);
    } else {
      resultSurf = GetTempSurface(readSize, format);
    }
    MOZ_ASSERT(resultSurf);
    if (resultSurf->CairoStatus() != 0) {
      MOZ_ASSERT(false, "Bad resultSurf->CairoStatus().");
      return;
    }

    MOZ_ASSERT(sharedSurf->APIType() == APITypeT::OpenGL);
    SharedSurface_GL* surfGL = SharedSurface_GL::Cast(sharedSurf);

    if (surfGL->Type() == SharedSurfaceType::Basic) {
      SharedSurface_Basic* sharedSurf_Basic = SharedSurface_Basic::Cast(surfGL);
      readSurf = sharedSurf_Basic->GetData();
    } else {
      if (resultSurf->Format() == format &&
          resultSurf->GetSize() == readSize)
      {
        readSurf = resultSurf;
      } else {
        readSurf = GetTempSurface(readSize, format);
      }

      // Readback handles Flush/MarkDirty.
      mGLContext->Screen()->Readback(surfGL, readSurf);
    }
    MOZ_ASSERT(readSurf);

    bool needsPremult = surfGL->HasAlpha() && !mIsGLAlphaPremult;
    if (needsPremult) {
      gfxImageSurface* sizedReadSurf = nullptr;
      if (readSurf->Format()  == resultSurf->Format() &&
          readSurf->GetSize() == resultSurf->GetSize())
      {
        sizedReadSurf = readSurf;
      } else {
        readSurf->Flush();
        nsRefPtr<gfxContext> ctx = new gfxContext(resultSurf);
        ctx->SetOperator(gfxContext::OPERATOR_SOURCE);
        ctx->SetSource(readSurf);
        ctx->Paint();

        sizedReadSurf = resultSurf;
      }
      MOZ_ASSERT(sizedReadSurf);

      readSurf->Flush();
      resultSurf->Flush();
      gfxUtils::PremultiplyImageSurface(readSurf, resultSurf);
      resultSurf->MarkDirty();
    } else if (resultSurf != readSurf) {
//.........这里部分代码省略.........

bool
SurfaceStreamHostOGL::Lock()
{
  mGL->MakeCurrent();

  SharedSurface* sharedSurf = mStream->SwapConsumer();
  if (!sharedSurf) {
    // We don't have a valid surf to show yet.
    return false;
  }

  mGL->MakeCurrent();

  mSize = IntSize(sharedSurf->Size().width, sharedSurf->Size().height);

  gfxImageSurface* toUpload = nullptr;
  switch (sharedSurf->Type()) {
    case SharedSurfaceType::GLTextureShare: {
      SharedSurface_GLTexture* glTexSurf = SharedSurface_GLTexture::Cast(sharedSurf);
      glTexSurf->SetConsumerGL(mGL);
      mTextureHandle = glTexSurf->Texture();
      mTextureTarget = glTexSurf->TextureTarget();
      MOZ_ASSERT(mTextureHandle);
      mFormat = sharedSurf->HasAlpha() ? FORMAT_R8G8B8A8
                                       : FORMAT_R8G8B8X8;
      break;
    }
    case SharedSurfaceType::EGLImageShare: {
      SharedSurface_EGLImage* eglImageSurf =
          SharedSurface_EGLImage::Cast(sharedSurf);

      mTextureHandle = eglImageSurf->AcquireConsumerTexture(mGL);
      mTextureTarget = eglImageSurf->TextureTarget();
      if (!mTextureHandle) {
        toUpload = eglImageSurf->GetPixels();
        MOZ_ASSERT(toUpload);
      } else {
        mFormat = sharedSurf->HasAlpha() ? FORMAT_R8G8B8A8
                                         : FORMAT_R8G8B8X8;
      }
      break;
    }
#ifdef XP_MACOSX
    case SharedSurfaceType::IOSurface: {
      SharedSurface_IOSurface* glTexSurf = SharedSurface_IOSurface::Cast(sharedSurf);
      mTextureHandle = glTexSurf->Texture();
      mTextureTarget = glTexSurf->TextureTarget();
      MOZ_ASSERT(mTextureHandle);
      mFormat = sharedSurf->HasAlpha() ? FORMAT_R8G8B8A8
                                       : FORMAT_R8G8B8X8;
      break;
    }
#endif
    case SharedSurfaceType::Basic: {
      toUpload = SharedSurface_Basic::Cast(sharedSurf)->GetData();
      MOZ_ASSERT(toUpload);
      break;
    }
    default:
      MOZ_CRASH("Invalid SharedSurface type.");
  }

  if (toUpload) {
    // mBounds seems to end up as (0,0,0,0) a lot, so don't use it?
    nsIntSize size(toUpload->GetSize());
    nsIntRect rect(nsIntPoint(0,0), size);
    nsIntRegion bounds(rect);
    mFormat = mGL->UploadSurfaceToTexture(toUpload,
                                          bounds,
                                          mUploadTexture,
                                          true);
    mTextureHandle = mUploadTexture;
    mTextureTarget = LOCAL_GL_TEXTURE_2D;
  }

  MOZ_ASSERT(mTextureHandle);
  mGL->fBindTexture(mTextureTarget, mTextureHandle);
  mGL->fTexParameteri(mTextureTarget,
                      LOCAL_GL_TEXTURE_WRAP_S,
                      LOCAL_GL_CLAMP_TO_EDGE);
  mGL->fTexParameteri(mTextureTarget,
                      LOCAL_GL_TEXTURE_WRAP_T,
                      LOCAL_GL_CLAMP_TO_EDGE);
  return true;
}

void
ShadowCanvasLayerOGL::RenderLayer(int aPreviousFrameBuffer,
                                  const nsIntPoint& aOffset)
{
  if (!mTexImage &&
      !IsValidSharedTexDescriptor(mFrontBufferDescriptor) &&
      !IsValidSurfaceStreamDescriptor(mFrontBufferDescriptor))
  {
    return;
  }

  if (mOGLManager->CompositingDisabled()) {
    return;
  }
  mOGLManager->MakeCurrent();
  gl()->EmptyTexGarbageBin();
  //ScopedBindTexture autoTex(gl());

  gfx3DMatrix effectiveTransform = GetEffectiveTransform();
  gfxPattern::GraphicsFilter filter = mFilter;
#ifdef ANDROID
  // Bug 691354
  // Using the LINEAR filter we get unexplained artifacts.
  // Use NEAREST when no scaling is required.
  gfxMatrix matrix;
  bool is2D = GetEffectiveTransform().Is2D(&matrix);
  if (is2D && !matrix.HasNonTranslationOrFlip()) {
    filter = gfxPattern::FILTER_NEAREST;
  }
#endif
  SurfaceStream* surfStream = nullptr;
  SharedSurface* sharedSurf = nullptr;
  if (IsValidSurfaceStreamDescriptor(mFrontBufferDescriptor)) {
    const SurfaceStreamDescriptor& streamDesc =
        mFrontBufferDescriptor.get_SurfaceStreamDescriptor();

    surfStream = SurfaceStream::FromHandle(streamDesc.handle());
    MOZ_ASSERT(surfStream);

    sharedSurf = surfStream->SwapConsumer();
    if (!sharedSurf) {
      // We don't have a valid surf to show yet.
      return;
    }

    gfxImageSurface* toUpload = nullptr;
    switch (sharedSurf->Type()) {
      case SharedSurfaceType::GLTextureShare: {
        mCurTexture = SharedSurface_GLTexture::Cast(sharedSurf)->Texture();
        MOZ_ASSERT(mCurTexture);
        mShaderType = sharedSurf->HasAlpha() ? RGBALayerProgramType
                                             : RGBXLayerProgramType;
        break;
      }
      case SharedSurfaceType::EGLImageShare: {
        SharedSurface_EGLImage* eglImageSurf =
            SharedSurface_EGLImage::Cast(sharedSurf);

        mCurTexture = eglImageSurf->AcquireConsumerTexture(gl());
        if (!mCurTexture) {
          toUpload = eglImageSurf->GetPixels();
          MOZ_ASSERT(toUpload);
        } else {
          mShaderType = sharedSurf->HasAlpha() ? RGBALayerProgramType
                                               : RGBXLayerProgramType;
        }
        break;
      }
      case SharedSurfaceType::Basic: {
        toUpload = SharedSurface_Basic::Cast(sharedSurf)->GetData();
        MOZ_ASSERT(toUpload);
        break;
      }
      default:
        MOZ_NOT_REACHED("Invalid SharedSurface type.");
        return;
    }

    if (toUpload) {
      // mBounds seems to end up as (0,0,0,0) a lot, so don't use it?
      nsIntSize size(toUpload->GetSize());
      nsIntRect rect(nsIntPoint(0,0), size);
      nsIntRegion bounds(rect);
      mShaderType = gl()->UploadSurfaceToTexture(toUpload,
                                                 bounds,
                                                 mUploadTexture,
                                                 true);
      mCurTexture = mUploadTexture;
    }

    MOZ_ASSERT(mCurTexture);
    gl()->fBindTexture(LOCAL_GL_TEXTURE_2D, mCurTexture);
    gl()->fTexParameteri(LOCAL_GL_TEXTURE_2D,
                         LOCAL_GL_TEXTURE_WRAP_S,
                         LOCAL_GL_CLAMP_TO_EDGE);
    gl()->fTexParameteri(LOCAL_GL_TEXTURE_2D,
                         LOCAL_GL_TEXTURE_WRAP_T,
                         LOCAL_GL_CLAMP_TO_EDGE);
  } else if (mTexImage) {
    mShaderType = mTexImage->GetShaderProgramType();
//.........这里部分代码省略.........

void
CopyableCanvasLayer::UpdateSurface(gfxASurface* aDestSurface, Layer* aMaskLayer)
{
  if (!IsDirty())
    return;
  Painted();

  if (mDrawTarget) {
    mDrawTarget->Flush();
    mSurface = gfxPlatform::GetPlatform()->GetThebesSurfaceForDrawTarget(mDrawTarget);
  }

  if (!mGLContext && aDestSurface) {
    nsRefPtr<gfxContext> tmpCtx = new gfxContext(aDestSurface);
    tmpCtx->SetOperator(gfxContext::OPERATOR_SOURCE);
    CopyableCanvasLayer::PaintWithOpacity(tmpCtx, 1.0f, aMaskLayer);
    return;
  }

  if (mGLContext) {
    if (aDestSurface && aDestSurface->GetType() != gfxASurface::SurfaceTypeImage) {
      MOZ_ASSERT(false, "Destination surface must be ImageSurface type.");
      return;
    }

    nsRefPtr<gfxImageSurface> readSurf;
    nsRefPtr<gfxImageSurface> resultSurf;

    SharedSurface* sharedSurf = mGLContext->RequestFrame();
    if (!sharedSurf) {
      NS_WARNING("Null frame received.");
      return;
    }

    gfxIntSize readSize(sharedSurf->Size());
    gfxImageFormat format = (GetContentFlags() & CONTENT_OPAQUE)
                            ? gfxASurface::ImageFormatRGB24
                            : gfxASurface::ImageFormatARGB32;

    if (aDestSurface) {
      resultSurf = static_cast<gfxImageSurface*>(aDestSurface);
    } else {
      resultSurf = GetTempSurface(readSize, format);
    }
    MOZ_ASSERT(resultSurf);
    if (resultSurf->CairoStatus() != 0) {
      MOZ_ASSERT(false, "Bad resultSurf->CairoStatus().");
      return;
    }

    MOZ_ASSERT(sharedSurf->APIType() == APITypeT::OpenGL);
    SharedSurface_GL* surfGL = SharedSurface_GL::Cast(sharedSurf);

    if (surfGL->Type() == SharedSurfaceType::Basic) {
      SharedSurface_Basic* sharedSurf_Basic = SharedSurface_Basic::Cast(surfGL);
      readSurf = sharedSurf_Basic->GetData();
    } else {
      if (resultSurf->Format() == format &&
          resultSurf->GetSize() == readSize)
      {
        readSurf = resultSurf;
      } else {
        readSurf = GetTempSurface(readSize, format);
      }

      // Readback handles Flush/MarkDirty.
      mGLContext->Screen()->Readback(surfGL, readSurf);
    }
    MOZ_ASSERT(readSurf);

    bool needsPremult = surfGL->HasAlpha() && !mIsGLAlphaPremult;
    if (needsPremult) {
      gfxImageSurface* sizedReadSurf = nullptr;
      if (readSurf->Format()  == resultSurf->Format() &&
          readSurf->GetSize() == resultSurf->GetSize())
      {
        sizedReadSurf = readSurf;
      } else {
        readSurf->Flush();
        nsRefPtr<gfxContext> ctx = new gfxContext(resultSurf);
        ctx->SetOperator(gfxContext::OPERATOR_SOURCE);
        ctx->SetSource(readSurf);
        ctx->Paint();

        sizedReadSurf = resultSurf;
      }
      MOZ_ASSERT(sizedReadSurf);

      readSurf->Flush();
      resultSurf->Flush();
      gfxUtils::PremultiplyImageSurface(readSurf, resultSurf);
      resultSurf->MarkDirty();
    } else if (resultSurf != readSurf) {
      // Didn't need premult, but we do need to blit to resultSurf
      readSurf->Flush();
      nsRefPtr<gfxContext> ctx = new gfxContext(resultSurf);
      ctx->SetOperator(gfxContext::OPERATOR_SOURCE);
      ctx->SetSource(readSurf);
      ctx->Paint();
    }
//.........这里部分代码省略.........