[Mesa-dev] [PATCH] glsl: subroutine types cannot be compared
airlied at gmail.com
Thu Jul 21 20:07:09 UTC 2016
> On Mon, 2016-07-18 at 16:39 +0300, Andres Gomez wrote:
>> subroutine variables are to be used just in the way functions are
>> called. Although the spec doesn't say it explicitely, this means that
>> these variables are not to be used in any other way than those left
>> for function calls. Therefore, a comparison between 2 subroutine
>> variables should also cause a compilation error.
>> From The OpenGL® Shading Language 4.40, page 117:
>> " To use subroutines, a subroutine type is declared, one or more
>> functions are associated with that subroutine type, and a
>> subroutine variable of that type is declared. The function
>> currently assigned to the variable function is then called by
>> using function calling syntax replacing a function name with the
>> name of the subroutine variable. Subroutine variables are
>> uniforms, and are assigned to specific functions only through
>> commands (UniformSubroutinesuiv) in the OpenGL API."
>> From The OpenGL® Shading Language 4.40, page 118:
>> " Subroutine uniform variables are called the same way functions
>> are called. When a subroutine variable (or an element of a
>> subroutine variable array) is associated with a particular
>> function, all function calls through that variable will call that
>> particular function."
>> Fixes GL44-CTS.shader_subroutine.subroutines_cannot_be_assigned_float_int_values_or_be_compared
>> Signed-off-by: Andres Gomez <agomez at igalia.com>
I prefer this one, please push it with Ian's r-b, and consider my one withdrawn.
Reviewed-by: Dave Airlie <airlied at redhat.com>
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