diff options
| -rw-r--r-- | drawinglayer/source/processor2d/vclhelperbufferdevice.cxx | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drawinglayer/source/processor2d/vclhelperbufferdevice.cxx b/drawinglayer/source/processor2d/vclhelperbufferdevice.cxx index e94f5818d077..d1045cc821e4 100644 --- a/drawinglayer/source/processor2d/vclhelperbufferdevice.cxx +++ b/drawinglayer/source/processor2d/vclhelperbufferdevice.cxx @@ -332,9 +332,26 @@ namespace drawinglayer } else if(0.0 != fTrans) { +#ifndef IOS + // For some reason using this "normal" code path on + // iOS with tiled rendering causes horrible artefacts: + // The mask ends up being drawn too, ending up looking + // as translucent milky rectangles covering the + // SmartArt (which is what this typically (?) ends up + // being used for) ... Why this doesn't cause any + // artefacts on OS X, which uses largely the very same + // code in vcl/quartz, I don't know. sal_uInt8 nMaskValue((sal_uInt8)basegfx::fround(fTrans * 255.0)); const AlphaMask aAlphaMask(aSizePixel, &nMaskValue); mrOutDev.DrawBitmapEx(maDestPixel.TopLeft(), BitmapEx(aContent, aAlphaMask)); +#else + // Not sure at all why this works, but it does. The + // result is not beautiful (jaggies), but better than + // blocking out rectangles of the image. + Bitmap aMask(aContent); + aMask.Convert(BMP_CONVERSION_8BIT_GREYS); + mrOutDev.DrawBitmapEx(maDestPixel.TopLeft(), BitmapEx(aContent, aMask)); +#endif } else { |