I think there is an issue in Image::readPixels that I noted in 2.8.x
Assume you have set the Image "packing" is set to say 4 , via
image->setPacking(4) before this call.
glReadPixels might try and store 'too much' data into _data ( overwriting
memory) because glReadPixels will be expecting the pixel data is using a
packing of 4 but allocateImage was passed a "packing" of 1 via the default
parameter.
It certainly cause my code to crash depending on the variations of width and
height.
void Image::readPixels(int x,int y,int width,int height,
GLenum format,GLenum type)
{
allocateImage(width,height,1,format,type);
glPixelStorei(GL_PACK_ALIGNMENT,_packing);
glReadPixels(x,y,width,height,format,type,_data);
}
changing code to
allocateImage(width,height,1,format,type,_packing);
seems to fix the issue.
It's pretty subtle, and may only affect some people who need a particular
format for the image data, and maybe calling setPacking is an abuse of the API
so this can be seen as informational only rather than a 'bug' report.
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=46637#46637
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