func initShader(gl *webgl.Context, canvas *js.Object) (*js.Object, bool) {
shader := gl.CreateProgram()
vertexShader, ok := getShader(gl, gl.VERTEX_SHADER, vertexShaderSource)
if !ok {
js.Global.Call("alert", "Error getting vertex shader")
return nil, false
}
fragShader, ok := getShader(gl, gl.FRAGMENT_SHADER, fragShaderSource)
if !ok {
js.Global.Call("alert", "Error getting fragment shader")
return nil, false
}
gl.AttachShader(shader, vertexShader)
gl.AttachShader(shader, fragShader)
gl.LinkProgram(shader)
if !gl.GetProgramParameterb(shader, gl.LINK_STATUS) {
js.Global.Call("alert", "couldnt init shaders :(")
return nil, false
}
gl.UseProgram(shader)
return shader, true
}