C++ (Cpp) EnsureRealizedBitmap示例

示例#1

文件： SourceSurfaceD2D1.cpp 项目： lgarner/mozilla-central

TemporaryRef<DataSourceSurface>
SourceSurfaceD2D1::GetDataSurface()
{
  HRESULT hr;

  EnsureRealizedBitmap();

  RefPtr<ID2D1Bitmap1> softwareBitmap;
  D2D1_BITMAP_PROPERTIES1 props;
  props.dpiX = 96;
  props.dpiY = 96;
  props.pixelFormat = D2DPixelFormat(mFormat);
  props.colorContext = nullptr;
  props.bitmapOptions = D2D1_BITMAP_OPTIONS_CANNOT_DRAW |
                        D2D1_BITMAP_OPTIONS_CPU_READ;
  hr = mDC->CreateBitmap(D2DIntSize(mSize), nullptr, 0, props, (ID2D1Bitmap1**)byRef(softwareBitmap));

  if (FAILED(hr)) {
    gfxCriticalError() << "Failed to create software bitmap: " << mSize << " Code: " << hexa(hr);
    return nullptr;
  }

  D2D1_POINT_2U point = D2D1::Point2U(0, 0);
  D2D1_RECT_U rect = D2D1::RectU(0, 0, mSize.width, mSize.height);
  
  hr = softwareBitmap->CopyFromBitmap(&point, mRealizedBitmap, &rect);

  if (FAILED(hr)) {
    gfxWarning() << "Failed to readback into software bitmap. Code: " << hexa(hr);
    return nullptr;
  }

  return MakeAndAddRef<DataSourceSurfaceD2D1>(softwareBitmap, mFormat);
}

示例#2

文件： SourceSurfaceD2D1.cpp 项目： Gabuzo/mozilla-central

TemporaryRef<DataSourceSurface>
SourceSurfaceD2D1::GetDataSurface()
{
  EnsureRealizedBitmap();

  RefPtr<ID2D1Bitmap1> softwareBitmap;
  D2D1_BITMAP_PROPERTIES1 props;
  props.dpiX = 96;
  props.dpiY = 96;
  props.pixelFormat = D2DPixelFormat(mFormat);
  props.colorContext = nullptr;
  props.bitmapOptions = D2D1_BITMAP_OPTIONS_CANNOT_DRAW |
                        D2D1_BITMAP_OPTIONS_CPU_READ;
  mDC->CreateBitmap(D2DIntSize(mSize), nullptr, 0, props, (ID2D1Bitmap1**)byRef(softwareBitmap));

  D2D1_POINT_2U point = D2D1::Point2U(0, 0);
  D2D1_RECT_U rect = D2D1::RectU(0, 0, mSize.width, mSize.height);
  softwareBitmap->CopyFromBitmap(&point, mRealizedBitmap, &rect);
  return new DataSourceSurfaceD2D1(softwareBitmap, mFormat);
}