Gl.IsProgram (gb.opengl.glsl)
Static Function IsProgram ( Program As Integer ) As Boolean
Determines if a name corresponds to a program object.
Parameters
- program
-
Specifies a potential program object.
Description
Gl.IsProgram returns
Gl.TRUE if
program
is the name of a program object previously created with
Gl.CreateProgram
and not yet deleted with
Gl.DeleteProgram.
If
program is zero or a non-zero value that
is not the name of a program object, or if an error occurs,
Gl.IsProgram returns Gl.FALSE.
Notes
No error is generated if
program is
not a valid program object name.
A program object marked for deletion with
Gl.DeleteProgram
but still in use as part of current rendering state is still considered
a program object and
Gl.IsProgram will return Gl.TRUE.
Associated Gets
Gl.Get
with the argument Gl.CURRENT_PROGRAM
Gl.GetActiveAttrib
with arguments
program and the index of
an active attribute variable
Gl.GetActiveUniform
with arguments
program and the index of
an active uniform variable
Gl.GetAttachedShaders
with argument
program
Gl.GetAttribLocation
with arguments
program and the name of an
attribute variable
Gl.GetProgram
with arguments
program and the parameter
to be queried
Gl.GetProgramInfoLog
with argument
program
Gl.GetUniform
with arguments
program and the location
of a uniform variable
Gl.GetUniformLocation
with arguments
program and the name of a
uniform variable
See also
Glu.niform,
Glu.seProgram,