[Bug 14762] GeforceFX series: fullscreen PP effect issues / RECT texcoord fixup

wine-bugs at winehq.org wine-bugs at winehq.org
Wed Apr 8 21:09:13 CDT 2009


--- Comment #66 from Tobias Jakobi <liquid.acid at gmx.net>  2009-04-08 21:09:09 ---
I looked into what Stefan told me, and I don't think it's going to work.

Quote from the ARB_fragment_program docs:

The error INVALID_VALUE is generated by commands
ProgramEnvParameter{fd}ARB, ProgramEnvParameter{fd}vARB, and
GetProgramEnvParameter{fd}vARB if <index> is greater than or equal
to the value of MAX_PROGRAM_ENV_PARAMETERS_ARB corresponding to the
program target <target>.

Like Stefan mentioned MAX_PROGRAM_ENV_PARAMETERS_ARB is usually 256.

Even if it would work to put something like "PARAM ThisIsMyPrivateThing =
{programs.env[256 + 1]};" into a fragment/vertex program, there is no way to
reliably fill the PARAM with data.

The docs clearly state that this would trigger an error. I'm very much against
exploiting some driver functionality that may be there (I haven't actually
tested what Stefan told me), but is potentially unstable and only exists for
some drivers / some GPUs.

Or am I misunderstanding something here??

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