func LoadProgram(program gl.Program, vertexShader gl.VertexShader, fragmentShader gl.FragmentShader) error {
gl.AttachShader(program, gl.Uint(vertexShader))
gl.AttachShader(program, gl.Uint(fragmentShader))
gl.LinkProgram(program)
var ok gl.Int
gl.GetProgramiv(program, gl.LINK_STATUS, &ok)
if ok == 0 {
fmt.Fprintln(os.Stderr, gl.GetProgramInfoLog(program))
gl.DeleteProgram(program)
return errors.New("Failed to link shader program")
}
return nil
}
func (s *StencilOp) Unmask(level int) *StencilOp {
gl.StencilFunc(gl.ALWAYS, gl.Int(level), ^gl.Uint(0))
return s
}
func (s *StencilOp) Mask(level int) *StencilOp {
gl.StencilFunc(gl.EQUAL, gl.Int(level), ^gl.Uint(0))
return s
}
func LoadFragmentShaderSource(shader gl.FragmentShader, filename string) error {
return LoadShader(gl.Uint(shader), filename)
}
func LoadVertexShaderSource(shader gl.VertexShader, filename string) error {
return LoadShader(gl.Uint(shader), filename)
}