On Fri, Sep 04, 2015 at 11:34:29AM -0700, Kenneth Graunke wrote:
> On Friday, September 04, 2015 07:24:54 PM Chris Wilson wrote:
> > The tiled memcpy fast paths perform a simple blit (with only a couple of
> > trivial pixel conversion routines) and do not accommodate PixelTransfer
> > operations. Therefore if any are set, fallback to the regular routines.
> > Note that PixelTransfer only applies to TexImage and ReadPixels, not to
> > GetTexImage.
>
>
> Hmm, do they really apply to TexImage?
>
> From the OpenGL 3.0 spec, 3.7.3, Pixel Transfer Modes
> "Pixel transfer modes affect the operation of DrawPixels (section 3.7.4),
> ReadPixels (section 4.3.2), and CopyPixels (section 4.3.3) at the time
> when one of these commands is executed (which may differ from the time
> the command is issued)."
In a much older version:
glPixelTransfer sets pixel transfer modes that affect the operation of
subsequent commands:
glCopyPixels,
glCopyTexImage1D,
glCopyTexImage2D,
glCopyTexSubImage1D,
glCopyTexSubImage2D,
glCopyTexSubImage3D,
glDrawPixels,
glReadPixels,
glTexImage1D,
glTexImage2D,
glTexImage3D,
glTexSubImage1D,
glTexSubImage2D,
glTexSubImage3D
Plus glPixelTransferf is used by tests/general/teximage-scale-bias.c to
affect the result of a glTexImage2D command.
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
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