Hi Chris, for read pixels there are examples
http://trac.openscenegraph.org/projects/osg//browser/OpenSceneGraph/trunk/examples/osgscreencapture/osgscreencapture.cpp https://code.google.com/p/osgworks/source/browse/trunk/src/osgwTools/ScreenCapture.cpp Regards Sergey On Thu, Aug 21, 2014 at 12:27 PM, Chris Hidden <[email protected]> wrote: > Yes! Ok, I read that forum and it gave me a better idea of how I might do > this. To account for transparency though I need to get the current > pbuffer and put it into a local byte array. > > Something like > > > Code: > > static BYTE pixels[width * height * 4] = {0}; > > unsigned char* ptr = g_image->data(); > > for (unsigned int i = 0; i < size; i += 2) > { > pixels[i] = (ptr[i / 2] >> 4); > pixels[i + 1] = (ptr[i / 2] & 0x0F); > } > > > > > Now this doens't really work of course, I just get an empy BYTE array. > > Normally this could be done with : > > > Code: > > glPixelStorei(GL_PACK_ALIGNMENT, 1); > glReadPixels(0, 0, IMAGE_WIDTH, IMAGE_HEIGHT, GL_BGRA_EXT, > GL_UNSIGNED_BYTE, pixels); > > > > > > I know that OSG has a readPixels method. But I don't really understand > how to read the pixels into a byte array. The optional packing parameter > is an int in the osg::image::readpixels. I just lack understanding of how > to make this conversion. > > How would I got about doing this? Is there maybe a better way in this > case than readpixels? > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=60728#60728 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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