func setupShaders(gl *webgl.Context) *js.Object {
vs := gl.CreateShader(gl.VERTEX_SHADER)
gl.ShaderSource(vs, vsSource)
gl.CompileShader(vs)
if gl.GetShaderParameter(vs, gl.COMPILE_STATUS).Bool() == false {
throw(errors.New(gl.GetShaderInfoLog(vs)))
}
ps := gl.CreateShader(gl.FRAGMENT_SHADER)
gl.ShaderSource(ps, psSource)
gl.CompileShader(ps)
if gl.GetShaderParameter(ps, gl.COMPILE_STATUS).Bool() == false {
throw(errors.New(gl.GetShaderInfoLog(ps)))
}
program := gl.CreateProgram()
gl.AttachShader(program, vs)
gl.AttachShader(program, ps)
gl.LinkProgram(program)
gl.UseProgram(program)
return program
}
func getShader(gl *webgl.Context, typ int, source string) (*js.Object, bool) {
shader := gl.CreateShader(typ)
gl.ShaderSource(shader, source)
gl.CompileShader(shader)
if !gl.GetShaderParameter(shader, gl.COMPILE_STATUS).Bool() {
js.Global.Call("alert", gl.GetShaderInfoLog(shader))
return nil, false
}
return shader, true
}