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'''OpenGL extension ARB.vertex_shader
This module customises the behaviour of the
OpenGL.raw.GL.ARB.vertex_shader to provide a more
Python-friendly API
'''
from OpenGL import platform, constants, constant, arrays
from OpenGL import extensions, wrapper
from OpenGL.GL import glget
import ctypes
from OpenGL.raw.GL.ARB.vertex_shader import *
### END AUTOGENERATED SECTION
from shader_objects import glGetObjectParameterivARB
base_glGetActiveAttribARB = glGetActiveAttribARB
def glGetActiveAttribARB(program, index):
"""Retrieve the name, size and type of the uniform of the index in the program"""
max_index = int(glGetObjectParameterivARB( program, GL_OBJECT_ACTIVE_ATTRIBUTES_ARB ))
length = int(glGetObjectParameterivARB( program, GL_OBJECT_ACTIVE_ATTRIBUTE_MAX_LENGTH_ARB))
if index < max_index and index >= 0 and length > 0:
name = ctypes.create_string_buffer(length)
size = arrays.GLintArray.zeros( (1,))
gl_type = arrays.GLuintArray.zeros( (1,))
base_glGetActiveAttribARB(program, index, length, None, size, gl_type, name)
return name.value, size[0], gl_type[0]
raise IndexError, 'index out of range from zero to %i' % (max_index - 1, )
glGetActiveAttribARB.wrappedOperation = base_glGetActiveAttribARB
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