def log(self, shader):
"""Get the error log for a shader.
shader = object to get log from
Returns a string containing the log or None if there is no log."""
length = glGetObjectParameterivARB(shader, GL_INFO_LOG_LENGTH)
if length > 0:
log = glGetInfoLogARB(shader)
return log
def compileShader(self, source, shaderType):
"""Compile shader source of given type.
source = file object open to shader source code
(or something else returning lines of GLSL code when iterated over)
shaderType = GL_VERTEX_SHADER_ARB or GL_FRAGMENT_SHADER_ARB
Returns the shader object, or raises an exception on error."""
shader = glCreateShaderObjectARB(shaderType)
glShaderSourceARB( shader, source )
glCompileShaderARB( shader )
status = glGetObjectParameterivARB(shader, GL_OBJECT_COMPILE_STATUS_ARB)
if not status:
raise ShaderCompilationError, self.log(shader)
else:
return shader