diff options
Diffstat (limited to 'src/openvg/qpixmapfilter_vg.cpp')
-rw-r--r-- | src/openvg/qpixmapfilter_vg.cpp | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/src/openvg/qpixmapfilter_vg.cpp b/src/openvg/qpixmapfilter_vg.cpp index 2dbdf7e28..5a263a593 100644 --- a/src/openvg/qpixmapfilter_vg.cpp +++ b/src/openvg/qpixmapfilter_vg.cpp @@ -335,6 +335,65 @@ void QVGPixmapDropShadowFilter::draw(QPainter *painter, const QPointF &dest, con vgDestroyImage(dstImage); } +QVGPixmapBlurFilter::QVGPixmapBlurFilter(QObject *parent) + : QPixmapBlurFilter(parent) +{ +} + +QVGPixmapBlurFilter::~QVGPixmapBlurFilter() +{ +} + +void QVGPixmapBlurFilter::draw(QPainter *painter, const QPointF &dest, const QPixmap &src, const QRectF &srcRect) const +{ + if (src.pixmapData()->classId() != QPixmapData::OpenVGClass) { + // The pixmap data is not an instance of QVGPixmapData, so fall + // back to the default blur filter implementation. + QPixmapBlurFilter::draw(painter, dest, src, srcRect); + return; + } + + QVGPixmapData *pd = static_cast<QVGPixmapData *>(src.pixmapData()); + + VGImage srcImage = pd->toVGImage(); + if (srcImage == VG_INVALID_HANDLE) + return; + + QSize size = pd->size(); + VGImage dstImage = vgCreateImage + (VG_sARGB_8888_PRE, size.width(), size.height(), + VG_IMAGE_QUALITY_FASTER); + if (dstImage == VG_INVALID_HANDLE) + return; + + // Clamp the radius range. We divide by 2 because the OpenVG blur + // is "too blurry" compared to the default raster implementation. + VGfloat maxRadius = VGfloat(vgGeti(VG_MAX_GAUSSIAN_STD_DEVIATION)); + VGfloat radiusF = VGfloat(radius()) / 2.0f; + if (radiusF < 0.001f) + radiusF = 0.001f; + else if (radiusF > maxRadius) + radiusF = maxRadius; + + vgGaussianBlur(dstImage, srcImage, radiusF, radiusF, VG_TILE_PAD); + + VGImage child = VG_INVALID_HANDLE; + + if (srcRect.isNull() || + (srcRect.topLeft().isNull() && srcRect.size() == size)) { + child = dstImage; + } else { + QRect src = srcRect.toRect(); + child = vgChildImage(dstImage, src.x(), src.y(), src.width(), src.height()); + } + + qt_vg_drawVGImage(painter, dest, child); + + if(child != dstImage) + vgDestroyImage(child); + vgDestroyImage(dstImage); +} + #endif QT_END_NAMESPACE |