Exemplo n.º 1
0
func compile(source string, ty int) gl.Shader {
	shader := gl.CreateShader(gl.Enum(ty))
	gl.ShaderSource(shader, source)

	gl.CompileShader(shader)
	if gl.GetShaderi(shader, gl.COMPILE_STATUS) != gl.TRUE {
		panic(gl.GetShaderInfoLog(shader))
	}
	checkError()

	return shader
}
Exemplo n.º 2
0
func loadShader(shaderType gl.Enum, src string) (gl.Shader, error) {
	shader := gl.CreateShader(shaderType)
	if !shader.Valid() {
		return gl.Shader{}, fmt.Errorf("glutil: could not create shader (type %v)", shaderType)
	}
	gl.ShaderSource(shader, src)
	gl.CompileShader(shader)
	if gl.GetShaderi(shader, gl.COMPILE_STATUS) == 0 {
		defer gl.DeleteShader(shader)
		return gl.Shader{}, fmt.Errorf("shader compile: %s", gl.GetShaderInfoLog(shader))
	}
	return shader, nil
}
Exemplo n.º 3
0
func (s *glShader) createShader(name, header, opts, vShader, fShader string) error {
	program := gl.CreateProgram()

	vertexShader := gl.CreateShader(gl.VERTEX_SHADER)
	gl.ShaderSource(vertexShader, strings.Join([]string{header, opts, vShader}, "\n"))
	gl.CompileShader(vertexShader)
	status := gl.Enum(gl.GetShaderi(vertexShader, gl.COMPILE_STATUS))
	if status != gl.TRUE {
		return dumpShaderError(vertexShader, name, "vert")
	}

	fragmentShader := gl.CreateShader(gl.FRAGMENT_SHADER)
	gl.ShaderSource(fragmentShader, strings.Join([]string{header, opts, fShader}, "\n"))
	gl.CompileShader(fragmentShader)
	status = gl.Enum(gl.GetShaderi(fragmentShader, gl.COMPILE_STATUS))
	if status != gl.TRUE {
		return dumpShaderError(fragmentShader, name, "vert")
	}

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

	gl.LinkProgram(program)
	status = gl.Enum(gl.GetProgrami(program, gl.LINK_STATUS))
	if status != gl.TRUE {
		return dumpProgramError(program, name)
	}

	s.vertexAttrib = gl.GetAttribLocation(program, "vertex")
	s.tcoordAttrib = gl.GetAttribLocation(program, "tcoord")

	s.program = program
	s.vertex = vertexShader
	s.fragment = fragmentShader

	return nil
}