use log::*;
use crate::error::WasmError;
use wasm_bindgen::JsCast;
use web_sys::WebGl2RenderingContext as Gl;

pub struct GraphicsContext {
}

impl GraphicsContext {
    pub fn from_canvas(canvas: web_sys::OffscreenCanvas) -> Result<Self, WasmError> {
        let context = canvas.get_context("webgl2")
            .map_err(|_| WasmError::WebGl2ContextCreation(
                    format!("context cration failed: getContext returned an exception")))?
            .ok_or_else(|| WasmError::WebGl2ContextCreation(
                    format!("context cration failed: getContext returned nothing")))?;
        let context = context
            .dyn_into::<Gl>()
            .map_err(|_| WasmError::WebGl2ContextCreation(
                    format!("context object is not a context")))?;

        //context.clear(Gl::COLOR_BUFFER_BIT);
        //context.clear_color(0.6, 0.0, 0.6, 1.0);
            
        Ok(Self {
        })
    }
}