1 files changed, 170 insertions, 0 deletions
diff --git a/client/lib/vendor/hidpi-canvas.js b/client/lib/vendor/hidpi-canvas.js
new file mode 100644
index 0000000..d5323b9
--- /dev/null
+++ b/client/lib/vendor/hidpi-canvas.js
@@ -0,0 +1,170 @@
+/**
+ * HiDPI Canvas Polyfill (1.0.10)
+ *
+ * Author: Jonathan D. Johnson (http://jondavidjohn.com)
+ * Homepage: https://github.com/jondavidjohn/hidpi-canvas-polyfill
+ * Issue Tracker: https://github.com/jondavidjohn/hidpi-canvas-polyfill/issues
+ * License: Apache-2.0
+*/
+(function(prototype) {
+
+	var pixelRatio = (function() {
+			var canvas = window.document.createElement('canvas'),
+					context = canvas.getContext('2d'),
+					backingStore = context.backingStorePixelRatio ||
+						context.webkitBackingStorePixelRatio ||
+						context.mozBackingStorePixelRatio ||
+						context.msBackingStorePixelRatio ||
+						context.oBackingStorePixelRatio ||
+						context.backingStorePixelRatio || 1;
+
+			return (window.devicePixelRatio || 1) / backingStore;
+		})(),
+
+		forEach = function(obj, func) {
+			for (var p in obj) {
+				if (obj.hasOwnProperty(p)) {
+					func(obj[p], p);
+				}
+			}
+		},
+
+		ratioArgs = {
+			'fillRect': 'all',
+			'clearRect': 'all',
+			'strokeRect': 'all',
+			'moveTo': 'all',
+			'lineTo': 'all',
+			'arc': [0,1,2],
+			'arcTo': 'all',
+			'bezierCurveTo': 'all',
+			'isPointinPath': 'all',
+			'isPointinStroke': 'all',
+			'quadraticCurveTo': 'all',
+			'rect': 'all',
+			'translate': 'all',
+			'createRadialGradient': 'all',
+			'createLinearGradient': 'all'
+		};
+
+	if (pixelRatio === 1) return;
+
+	forEach(ratioArgs, function(value, key) {
+		prototype[key] = (function(_super) {
+			return function() {
+				var i, len,
+					args = Array.prototype.slice.call(arguments);
+
+				if (value === 'all') {
+					args = args.map(function(a) {
+						return a * pixelRatio;
+					});
+				}
+				else if (Array.isArray(value)) {
+					for (i = 0, len = value.length; i < len; i++) {
+						args[value[i]] *= pixelRatio;
+					}
+				}
+
+				return _super.apply(this, args);
+			};
+		})(prototype[key]);
+	});
+
+	 // Stroke lineWidth adjustment
+	prototype.stroke = (function(_super) {
+		return function() {
+			this.lineWidth *= pixelRatio;
+			_super.apply(this, arguments);
+			this.lineWidth /= pixelRatio;
+		};
+	})(prototype.stroke);
+
+	// Text
+	//
+	prototype.fillText = (function(_super) {
+		return function() {
+			var args = Array.prototype.slice.call(arguments);
+
+			args[1] *= pixelRatio; // x
+			args[2] *= pixelRatio; // y
+
+			this.font = this.font.replace(
+				/(\d+)(px|em|rem|pt)/g,
+				function(w, m, u) {
+					return (m * pixelRatio) + u;
+				}
+			);
+
+			_super.apply(this, args);
+
+			this.font = this.font.replace(
+				/(\d+)(px|em|rem|pt)/g,
+				function(w, m, u) {
+					return (m / pixelRatio) + u;
+				}
+			);
+		};
+	})(prototype.fillText);
+
+	prototype.strokeText = (function(_super) {
+		return function() {
+			var args = Array.prototype.slice.call(arguments);
+
+			args[1] *= pixelRatio; // x
+			args[2] *= pixelRatio; // y
+
+			this.font = this.font.replace(
+				/(\d+)(px|em|rem|pt)/g,
+				function(w, m, u) {
+					return (m * pixelRatio) + u;
+				}
+			);
+
+			_super.apply(this, args);
+
+			this.font = this.font.replace(
+				/(\d+)(px|em|rem|pt)/g,
+				function(w, m, u) {
+					return (m / pixelRatio) + u;
+				}
+			);
+		};
+	})(prototype.strokeText);
+})(window.CanvasRenderingContext2D.prototype);
+;(function(prototype) {
+	prototype.getContext = (function(_super) {
+		return function(type) {
+			var backingStore, ratio, context;
+
+
+			if (type == '2d-lodpi') {
+				context = _super.call(this, '2d');
+			}
+			else if (type === '2d') {
+				context = _super.call(this, '2d');
+
+				backingStore = context.backingStorePixelRatio ||
+							context.webkitBackingStorePixelRatio ||
+							context.mozBackingStorePixelRatio ||
+							context.msBackingStorePixelRatio ||
+							context.oBackingStorePixelRatio ||
+							context.backingStorePixelRatio || 1;
+
+				ratio = (window.devicePixelRatio || 1) / backingStore;
+
+				if (ratio > 1) {
+					this.style.height = this.height + 'px';
+					this.style.width = this.width + 'px';
+					this.width *= ratio;
+					this.height *= ratio;
+				}
+			}
+			else {
+			  context = _super.call(this, type);
+			}
+			
+			return context;
+		};
+	})(prototype.getContext);
+})(window.HTMLCanvasElement.prototype);