Kicks off a WebGL implementation

components/canvas/canvas_msg.rs

@@ -0,0 +1,61 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use canvas_paint_task::{FillOrStrokeStyle, LineCapStyle, LineJoinStyle};
+use geom::matrix2d::Matrix2D;
+use geom::point::Point2D;
+use geom::rect::Rect;
+use geom::size::Size2D;
+use std::sync::mpsc::{Sender};
+
+#[derive(Clone)]
+pub enum CanvasMsg {
+    Canvas2d(Canvas2dMsg),
+    Common(CanvasCommonMsg),
+    WebGL(CanvasWebGLMsg),
+}
+
+#[derive(Clone)]
+pub enum Canvas2dMsg {
+    Arc(Point2D<f32>, f32, f32, f32, bool),
+    ArcTo(Point2D<f32>, Point2D<f32>, f32),
+    DrawImage(Vec<u8>, Size2D<f64>, Rect<f64>, Rect<f64>, bool),
+    DrawImageSelf(Size2D<f64>, Rect<f64>, Rect<f64>, bool),
+    BeginPath,
+    BezierCurveTo(Point2D<f32>, Point2D<f32>, Point2D<f32>),
+    ClosePath,
+    ClearRect(Rect<f32>),
+    Fill,
+    FillRect(Rect<f32>),
+    GetImageData(Rect<f64>, Size2D<f64>, Sender<Vec<u8>>),
+    LineTo(Point2D<f32>),
+    MoveTo(Point2D<f32>),
+    PutImageData(Vec<u8>, Rect<f64>, Option<Rect<f64>>),
+    QuadraticCurveTo(Point2D<f32>, Point2D<f32>),
+    RestoreContext,
+    SaveContext,
+    StrokeRect(Rect<f32>),
+    Stroke,
+    SetFillStyle(FillOrStrokeStyle),
+    SetStrokeStyle(FillOrStrokeStyle),
+    SetLineWidth(f32),
+    SetLineCap(LineCapStyle),
+    SetLineJoin(LineJoinStyle),
+    SetMiterLimit(f32),
+    SetGlobalAlpha(f32),
+    SetTransform(Matrix2D<f32>),
+}
+
+#[derive(Clone)]
+pub enum CanvasWebGLMsg {
+    Clear(u32),
+    ClearColor(f32, f32, f32, f32),
+}
+
+#[derive(Clone)]
+pub enum CanvasCommonMsg {
+    Close,
+    Recreate(Size2D<i32>),
+    SendPixelContents(Sender<Vec<u8>>),
+}