From b75597c140e9b4758a1ad803044dda96b403e1a5 Mon Sep 17 00:00:00 2001
From: natrixaeria <janng@gmx.de>
Date: Fri, 14 Jun 2019 00:13:15 +0200
Subject: Wrap WebGl2

---
 webhogg/wasm/src/context/graphics.rs | 19 +++++++++++--------
 webhogg/wasm/src/context/mod.rs      |  1 +
 webhogg/wasm/src/context/webgl.rs    | 26 ++++++++++++++++++++++++++
 3 files changed, 38 insertions(+), 8 deletions(-)
 create mode 100644 webhogg/wasm/src/context/webgl.rs

diff --git a/webhogg/wasm/src/context/graphics.rs b/webhogg/wasm/src/context/graphics.rs
index b94441d..fa37e39 100644
--- a/webhogg/wasm/src/context/graphics.rs
+++ b/webhogg/wasm/src/context/graphics.rs
@@ -1,10 +1,12 @@
 use log::*;
 use crate::error::WasmError;
 use wasm_bindgen::JsCast;
-use web_sys::WebGl2RenderingContext as Gl;
+use web_sys::WebGl2RenderingContext as GlContext;
+
+use super::webgl::{Color4, WebGl2};
 
 pub struct GraphicsContext {
-    gl: Gl,
+    gl: WebGl2,
     frame_nr: u64,
 }
 
@@ -16,26 +18,27 @@ impl GraphicsContext {
             .ok_or_else(|| WasmError::WebGl2ContextCreation(
                     format!("context cration failed: getContext returned nothing")))?;
         let context = context
-            .dyn_into::<Gl>()
+            .dyn_into::<GlContext>()
             .map_err(|_| WasmError::WebGl2ContextCreation(
                     format!("context object is not a context")))?;
+
+        let gl = WebGl2::from_context(context);
             
         Ok(Self {
-            gl: context,
-            frame_nr: 0,
+            gl, frame_nr: 0,
         })
     }
 
     pub fn update(&mut self) -> Result<(), WasmError> {
         let light = 0.5;
+        let speed = 60.0;
 
-        let a = (self.frame_nr as f32) / 60.0;
+        let a = (self.frame_nr as f32) / speed;
         let a = f32::abs(f32::sin(a));
         let b = f32::abs(f32::cos(a));
         let (a, b) = (a * light, b * light);
 
-        self.gl.clear_color(a, light - a, b, 1.0);
-        self.gl.clear(Gl::COLOR_BUFFER_BIT);
+        self.gl.clear(Color4::new(a, light - a, b, 1.0));
 
         self.frame_nr += 1;
 
diff --git a/webhogg/wasm/src/context/mod.rs b/webhogg/wasm/src/context/mod.rs
index 3e8261b..a581047 100644
--- a/webhogg/wasm/src/context/mod.rs
+++ b/webhogg/wasm/src/context/mod.rs
@@ -1,3 +1,4 @@
+mod webgl;
 pub mod graphics;
 pub mod logic;
 
diff --git a/webhogg/wasm/src/context/webgl.rs b/webhogg/wasm/src/context/webgl.rs
new file mode 100644
index 0000000..abecc6e
--- /dev/null
+++ b/webhogg/wasm/src/context/webgl.rs
@@ -0,0 +1,26 @@
+use web_sys::WebGl2RenderingContext as GlContext;
+
+pub struct Color4(f32, f32, f32, f32);
+
+impl Color4 {
+    pub fn new(r: f32, g: f32, b: f32, a: f32) -> Color4 {
+        Color4(r, g, b, a)
+    }
+}
+
+pub struct WebGl2 {
+    gl: GlContext,
+}
+
+impl WebGl2 {
+    pub fn from_context(context: GlContext) -> Self {
+        WebGl2 {
+            gl: context,
+        }
+    }
+
+    pub fn clear(&self, color: Color4) {
+        self.gl.clear_color(color.0, color.1, color.2, color.3);
+        self.gl.clear(GlContext::COLOR_BUFFER_BIT);
+    }
+}
-- 
cgit v1.2.3-54-g00ecf