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) LoadProgram(tag, vsfilename, fsfilename string) {
vtag := tag + "_vs"
ftag := tag + "_fs"
lib.LoadVertexShader(vtag, vsfilename)
lib.LoadFragmentShader(ftag, fsfilename)
program := gl.CreateProgram()
err := LoadProgram(program, lib.VertexShaders[vtag], lib.FragmentShaders[ftag])
if err != nil {
panic(err)
}
_, ok := lib.Programs[tag]
if !ok {
lib.Programs[tag] = program
} else {
panic("program: '" + tag + "' already defined")
}
}