Hello Michael,
On 12/14/2010 08:34 AM, Michael Raab wrote:
> was there a special reason why FBOViewport doesn't read back depth buffer
> values?
don't think so, just nobody implemented it at the time.
> Looking at the code it seems to me that changing the code around line 1013 -
> 1049 in OSGFBOViewport.cpp may do the trick, expecting that texturechunk
> internal format is something like GL_DEPTH_COMPONENT.
yes, but note that lines 1013ff is the readback for emulating an FBO,
the code path that uses a real FBO is at lines 1438ff.
> What about the image format, that seems to be a litte bit more tricky.
doesn't the OpenGL spec for FBOs say anything on the format/data type
for reading the depth attachment? The FBOViewport only has to check if
the image has a compatible format/data type to read depth data into.
Sorry, not certain I understand the question.
Cheers,
Carsten
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