[ pyopengl-Bugs-2935298 ] glShaderSource wrapper fail on ATI card ?

Bugs item #2935298, was opened at 2010-01-19 18:04
Message generated for change (Comment added) made by mcfletch
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Category: GL
Group: v2.0
>Status: Closed
>Resolution: Fixed
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Mike C. Fletcher (mcfletch)
Summary: glShaderSource wrapper fail on ATI card ?

Initial Comment:
Hi everyone,

I got a problem on my framework with Shader + ATI card. By switching from pyglet to pyopengl, shader just not working anymore. After investigation, it seem that the wrapper on glShaderSource is not working properly.

If i use the pyopengl wrapper (glShaderSource(shader, source)), i got an error at glLinkProgram() :
Fragment shader was successfully compiled to run on hardware.
Fragment shader(s) failed to link,  vertex shader(s) failed to link.
ERROR: 1:1: error(#132) Syntax error: 'v' parse error
ERROR: error(#273) 1 compilation errors.  No code generated
ERROR: 1:1: error(#132) Syntax error: 'v' parse error
ERROR: error(#273) 1 compilation errors.  No code generated

If i'm doing ctype myself like:
glShaderSource = platform.createBaseFunction( 
    'glShaderSource', dll=platform.GL,
    resultType=None, 
    argTypes=(constants.GLhandle, constants.GLsizei, ctypes.POINTER(ctypes.c_char_p), arrays.GLintArray,),
    doc = 'glShaderSource( GLhandle(shaderObj), str( string) ) -> None',
    argNames = ('shaderObj', 'count', 'string', 'length',),
)

from ctypes import *
source = c_char_p(source)
length = c_int(-1)
glShaderSource(shader, 1, byref(source), byref(length))

-> no more error message at glLinkProgram.

Where i can debug more the wrapper function ? Is it a converter problem ?

Thanks,

Mathieu

Note: i'm running the 3.0.0-0ubuntu1 from Ubuntu Karmic.

----------------------------------------------------------------------

>Comment By: Mike C. Fletcher (mcfletch)
Date: 2010-02-22 15:45

Message:
This is almost certainly the case where you are specifying the source as a
single string.  The function actually takes a list-of-strings.  Some
implementations work perfectly well with the
sequence-of-one-character-strings (concatenating them before compiling),
others run the syntax check/compile before concatenation.

I've just added code to convert to a list before doing the conversion if
you pass in a string.  Hopefully this will avoid these problems in the
future.

----------------------------------------------------------------------

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