Example #1
0
// CreateProgram creates, compiles, and links a gl.Program.
func CreateProgram(vertexSrc, fragmentSrc string) (gl.Program, error) {
	program := gl.CreateProgram()
	if program.Value == 0 {
		return gl.Program{}, fmt.Errorf("glutil: no programs available")
	}

	vertexShader, err := loadShader(gl.VERTEX_SHADER, vertexSrc)
	if err != nil {
		return gl.Program{}, err
	}
	fragmentShader, err := loadShader(gl.FRAGMENT_SHADER, fragmentSrc)
	if err != nil {
		gl.DeleteShader(vertexShader)
		return gl.Program{}, err
	}

	gl.AttachShader(program, vertexShader)
	gl.AttachShader(program, fragmentShader)
	gl.LinkProgram(program)

	// Flag shaders for deletion when program is unlinked.
	gl.DeleteShader(vertexShader)
	gl.DeleteShader(fragmentShader)

	if gl.GetProgrami(program, gl.LINK_STATUS) == 0 {
		defer gl.DeleteProgram(program)
		return gl.Program{}, fmt.Errorf("glutil: %s", gl.GetProgramInfoLog(program))
	}
	return program, nil
}
Example #2
0
func createProgram(vertShaderSrc string, fragShaderSrc string) gl.Program {
	vertShader := loadShader(gl.VERTEX_SHADER, vertShaderSrc)
	fragShader := loadShader(gl.FRAGMENT_SHADER, fragShaderSrc)

	prog := gl.CreateProgram()

	gl.AttachShader(prog, vertShader)
	gl.AttachShader(prog, fragShader)
	gl.LinkProgram(prog)

	// TODO: Was GetProgramiv
	gl.GetProgrami(prog, gl.LINK_STATUS)

	return prog
}