On 03/15/2012 11:26 AM, Ian Romanick wrote:
On 03/13/2012 11:35 AM, Dylan Noblesmith wrote:
Module: Mesa
Branch: master
Commit: b536ac6b2bc54ad9bb6e58fbd307055e419a288f
URL:
http://cgit.freedesktop.org/mesa/mesa/commit/?id=b536ac6b2bc54ad9bb6e58fbd307055e419a288f
Author: Dylan Noblesmith<[email protected]>
Date: Thu Dec 22 21:05:38 2011 +0000
mesa: add back glGetnUniform*v() overflow error reporting
The error was removed in:
commit 719909698c67c287a393d2380278e7b7495ae018
Author: Ian Romanick<[email protected]>
Date: Tue Oct 18 16:01:49 2011 -0700
mesa: Rewrite the way uniforms are tracked and handled
The GL_ARB_robustness spec doesn't say the implementation
should truncate the output, so just return after setting
the required error like it did before the above commit.
This patch is wrong. Please revert. The ARB_robustness spec specifically
says:
"The commands
void GetUniformfv(uint program, int location, float *params);
void GetnUniformfvARB(uint program, int location, sizei bufSize,
float *params);
void GetUniformiv(uint program, int location, int *params);
void GetnUniformivARB(uint program, int location, sizei bufSize,
int *params);
void GetUniformuiv(uint program, int location, uint *params);
void GetnUniformuivARB(uint program, int location, sizei bufSize,
uint *params);
void GetUniformdv(uint program, int location, uint *params);
void GetnUniformdvARB(uint program, int location, sizei bufSize,
uint *params);
return the value or values of the uniform at location location of
the default uniform block for program object program in the array
params. GetnUniformfvARB, GetnUniformivARB, GetnUniformuivARB and
GetnUniformdvARB do not write more than <bufSize> bytes into <params>."
The "do not write more than <bufSize> bytes" is the important bit.
In the future, please wait for at least one Reviewed-by when changing
API behavior, and quote spec language in the code to justify such changes.
In fairness, those patches had sat on the list for a long time, which
seems to invoke the "silence is consent" rule. We should have reviewed
it earlier.
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