void RainDropTool::putPreviewData()
{
ImageIface* iface = d->previewWidget->imageIface();
DImg imDest = filter()->getTargetImage().smoothScale(iface->previewWidth(), iface->previewHeight());
iface->putPreviewImage(imDest.bits());
d->previewWidget->updatePreview();
}
void ResizeTool::putPreviewData()
{
ImageIface* iface = d->previewWidget->imageIface();
int w = iface->previewWidth();
int h = iface->previewHeight();
DImg imTemp = filter()->getTargetImage().smoothScale(w, h, Qt::KeepAspectRatio);
DImg imDest(w, h, filter()->getTargetImage().sixteenBit(), filter()->getTargetImage().hasAlpha());
QColor background = toolView()->backgroundRole();
imDest.fill(DColor(background, filter()->getTargetImage().sixteenBit()));
imDest.bitBltImage(&imTemp, (w-imTemp.width())/2, (h-imTemp.height())/2);
iface->putPreviewImage((imDest.smoothScale(iface->previewWidth(), iface->previewHeight())).bits());
d->previewWidget->updatePreview();
}