Пример #1
0
// CreateProgram creates, compiles, and links a gl.Program.
func CreateProgram(vertexSrc, fragmentSrc string) (gl.Program, error) {
	program := gl.CreateProgram()
	if !program.Valid() {
		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
}
Пример #2
0
func (s *glShader) deleteShader() {
	if s.program.Valid() {
		gl.DeleteProgram(s.program)
	}
	if s.vertex.Valid() {
		gl.DeleteShader(s.vertex)
	}
	if s.fragment.Valid() {
		gl.DeleteShader(s.fragment)
	}
}
Пример #3
0
func (s *shaderProgram) destroy(ctx *context) {
	gl.DeleteProgram(s.program)
	s.program = gl.Program{}
	// TODO: Delete shaders.
	ctx.stats.shaderProgramCount--
}