Hi Robert,
I'm trying to copy the top half of an existing image using osg::copyImage.
I do this as such:
// Read in source image
osg::ref_ptr< osg::Image > pImageSrc = osgDB::readImageFile( "test.jpg"
);
int nHalfSrcHeight = (int)(pImageSrc->t() * 0.5);
// Allocate destination image
osg::Image *pImageDest = new osg::Image();
pImageDest->allocateImage(pImageSrc->s(), nHalfSrcHeight,
pImageSrc->r(), pImageSrc->getPixelFormat(), pImageSrc->getDataType());
// Copy top half of source image to destination
myCopyImage( pImageSrc.get(), 0, (nHalfSrcHeight-1), 0, pImageSrc->s(),
nHalfSrcHeight, pImageSrc->r(),
pImageDest, 0, 0, 0, false );
This appears to be the correct way to perform this operation. Is this
correct? If so, then line 210 of osg/ImageUtils.cpp appears to be incorrect
as it notifies that my input height is too large. And indeed when I commend
out the block below in ImageUtils.cpp, then it outputs the top half of my
image as I expect.
if ((src_t+height) > (dest_t + destImage->t()))
{
osg::notify(osg::NOTICE)<<"copyImage("<<srcImage<<", "<<src_s<<",
"<< src_t<<", "<<src_r<<", "<<width<<", "<<height<<", "<<depth<<std::endl;
osg::notify(osg::NOTICE)<<" "<<destImage<<", "<<dest_s<<",
"<< dest_t<<", "<<dest_r<<", "<<doRescale<<")"<<std::endl;
osg::notify(osg::NOTICE)<<" input height too large."<<std::endl;
return false;
}
Thanks for any help you can provide,
Donny
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