func Bind(bindings interface{}) {
value := reflect.ValueOf(bindings).Elem()
n := value.NumField()
for i := 0; i < n; i++ {
field := value.Field(i)
switch field.Type() {
case bufferType:
buffer := gl.GenBuffer()
field.Set(reflect.ValueOf(buffer))
case textureType:
texture := gl.GenTexture()
field.Set(reflect.ValueOf(texture))
case vaoType:
vao := gl.GenVertexArray()
field.Set(reflect.ValueOf(vao))
case vertexShaderType:
shader := gl.VertexShader(gl.CreateShader(gl.VERTEX_SHADER))
field.Set(reflect.ValueOf(shader))
case fragmentShaderType:
shader := gl.FragmentShader(gl.CreateShader(gl.FRAGMENT_SHADER))
field.Set(reflect.ValueOf(shader))
case programType:
program := gl.CreateProgram()
field.Set(reflect.ValueOf(program))
}
}
}
func (lib *ShaderLibrary) LoadFragmentShader(tag, filename string) {
_, ok := lib.FragmentShaders[tag]
if !ok {
shader := gl.FragmentShader(gl.CreateShader(gl.FRAGMENT_SHADER))
err := LoadFragmentShaderSource(shader, filename)
if err != nil {
panic(err)
}
lib.FragmentShaders[tag] = shader
}
}
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
}
var bufferType = reflect.TypeOf(gl.Buffer(0))
var textureType = reflect.TypeOf(gl.Texture(0))
var vaoType = reflect.TypeOf(gl.VertexArrayObject(0))
var vertexShaderType = reflect.TypeOf(gl.VertexShader(0))
var fragmentShaderType = reflect.TypeOf(gl.FragmentShader(0))
var programType = reflect.TypeOf(gl.Program(0))
var uniformLocationType = reflect.TypeOf(gl.UniformLocation(0))
var attributeLocationType = reflect.TypeOf(gl.AttributeLocation(0))
func Bind(bindings interface{}) {
value := reflect.ValueOf(bindings).Elem()
n := value.NumField()
for i := 0; i < n; i++ {
field := value.Field(i)
switch field.Type() {
case bufferType:
buffer := gl.GenBuffer()
field.Set(reflect.ValueOf(buffer))
case textureType: