Implementation of pattern fill style for canvas.

components/script/dom/canvaspattern.rs

@@ -2,12 +2,54 @@
  * 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 dom::bindings::utils::Reflector;
+use canvas_traits::{FillOrStrokeStyle, SurfaceStyle, RepetitionStyle};
+use dom::bindings::codegen::Bindings::CanvasPatternBinding;
+use dom::bindings::global::GlobalRef;
+use dom::bindings::js::{JSRef, Temporary};
+use dom::bindings::utils::{Reflector, reflect_dom_object};
+use dom::canvasgradient::ToFillOrStrokeStyle;
+use geom::size::Size2D;
 
 // https://html.spec.whatwg.org/multipage/#canvaspattern
 #[dom_struct]
 pub struct CanvasPattern {
     reflector_: Reflector,
+    surface_data: Vec<u8>,
+    surface_size: Size2D<i32>,
+    repeat_x: bool,
+    repeat_y: bool,
 }
 
+impl CanvasPattern {
+    fn new_inherited(surface_data: Vec<u8>, surface_size: Size2D<i32>, repeat: RepetitionStyle) -> CanvasPattern {
+        let (x, y) = match repeat {
+            RepetitionStyle::Repeat => (true, true),
+            RepetitionStyle::RepeatX => (true, false),
+            RepetitionStyle::RepeatY => (false, true),
+            RepetitionStyle::NoRepeat => (false, false),
+        };
 
+        CanvasPattern {
+            reflector_: Reflector::new(),
+            surface_data: surface_data,
+            surface_size: surface_size,
+            repeat_x: x,
+            repeat_y: y,
+        }
+    }
+    pub fn new(global: GlobalRef,
+               surface_data: Vec<u8>,
+               surface_size: Size2D<i32>,
+               repeat: RepetitionStyle)
+               -> Temporary<CanvasPattern> {
+        reflect_dom_object(box CanvasPattern::new_inherited(surface_data, surface_size, repeat),
+                           global, CanvasPatternBinding::Wrap)
+    }
+}
+
+impl<'a> ToFillOrStrokeStyle for JSRef<'a, CanvasPattern> {
+    fn to_fill_or_stroke_style(&self) -> FillOrStrokeStyle {
+        FillOrStrokeStyle::Surface(
+            SurfaceStyle::new(self.surface_data.clone(), self.surface_size, self.repeat_x, self.repeat_y))
+    }
+}