protected void blitSurfaceData(
SunGraphics2D sg,
Region clipRegion,
SurfaceData srcData,
SurfaceData dstData,
SurfaceType srcType,
SurfaceType dstType,
int sx,
int sy,
int dx,
int dy,
int w,
int h,
Color bgColor) {
if (w <= 0 || h <= 0) {
/*
* Fix for bugid 4783274 - BlitBg throws an exception for
* a particular set of anomalous parameters.
* REMIND: The native loops do proper clipping and would
* detect this situation themselves, but the Java loops
* all seem to trust their parameters a little too well
* to the point where they will try to process a negative
* area of pixels and throw exceptions. The real fix is
* to modify the Java loops to do proper clipping so that
* they can deal with negative dimensions as well as
* improperly large dimensions, but that fix is too risky
* to integrate for Mantis at this point. In the meantime
* eliminating the negative or zero dimensions here is
* "correct" and saves them from some nasty exceptional
* conditions, one of which is the test case of 4783274.
*/
return;
}
CompositeType comp = sg.imageComp;
if (CompositeType.SrcOverNoEa.equals(comp)
&& (srcData.getTransparency() == Transparency.OPAQUE
|| (bgColor != null && bgColor.getTransparency() == Transparency.OPAQUE))) {
comp = CompositeType.SrcNoEa;
}
if (!isBgOperation(srcData, bgColor)) {
Blit blit = Blit.getFromCache(srcType, comp, dstType);
blit.Blit(srcData, dstData, sg.composite, clipRegion, sx, sy, dx, dy, w, h);
} else {
BlitBg blit = BlitBg.getFromCache(srcType, comp, dstType);
blit.BlitBg(
srcData, dstData, sg.composite, clipRegion, bgColor.getRGB(), sx, sy, dx, dy, w, h);
}
}
public boolean isTransparent() {
return (color.getTransparency() == Transparency.TRANSLUCENT);
}