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added support to define pixel ratio with Canvas constructor

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This commit is contained in:
Eric Rowell
2013-02-12 10:29:23 -08:00
parent 26943f8245
commit 66cc6cd98c
3 changed files with 14 additions and 11 deletions
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19
src/Canvas.js
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@@ -3,7 +3,7 @@
var canvas = document.createElement('canvas'),
context = canvas.getContext('2d'),
devicePixelRatio = window.devicePixelRatio || 1, backingStoreRatio = context.webkitBackingStorePixelRatio || context.mozBackingStorePixelRatio || context.msBackingStorePixelRatio || context.oBackingStorePixelRatio || context.backingStorePixelRatio || 1,
pixelRatio = devicePixelRatio / backingStoreRatio;
_pixelRatio = devicePixelRatio / backingStoreRatio;
/**
* Canvas Renderer constructor
@@ -11,7 +11,8 @@
* @param {Number} width
* @param {Number} height
*/
Kinetic.Canvas = function(width, height) {
Kinetic.Canvas = function(width, height, pixelRatio) {
this.pixelRatio = pixelRatio || _pixelRatio;
this.width = width;
this.height = height;
this.element = document.createElement('canvas');
@@ -55,7 +56,7 @@
setWidth: function(width) {
this.width = width;
// take into account pixel ratio
this.element.width = width * pixelRatio;
this.element.width = width * this.pixelRatio;
this.element.style.width = width + 'px';
},
/**
@@ -67,7 +68,7 @@
setHeight: function(height) {
this.height = height;
// take into account pixel ratio
this.element.height = height * pixelRatio;
this.element.height = height * this.pixelRatio;
this.element.style.height = height + 'px';
},
/**
@@ -202,16 +203,18 @@
}
};
Kinetic.SceneCanvas = function(width, height) {
Kinetic.Canvas.call(this, width, height);
Kinetic.SceneCanvas = function(width, height, pixelRatio) {
Kinetic.Canvas.call(this, width, height, pixelRatio);
};
Kinetic.SceneCanvas.prototype = {
setWidth: function(width) {
var pixelRatio = this.pixelRatio;
Kinetic.Canvas.prototype.setWidth.call(this, width);
this.context.scale(pixelRatio, pixelRatio);
},
setHeight: function(height) {
var pixelRatio = this.pixelRatio;
Kinetic.Canvas.prototype.setHeight.call(this, height);
this.context.scale(pixelRatio, pixelRatio);
},
@@ -353,8 +356,8 @@
};
Kinetic.Global.extend(Kinetic.SceneCanvas, Kinetic.Canvas);
Kinetic.HitCanvas = function(width, height) {
Kinetic.Canvas.call(this, width, height);
Kinetic.HitCanvas = function(width, height, pixelRatio) {
Kinetic.Canvas.call(this, width, height, pixelRatio);
};
Kinetic.HitCanvas.prototype = {

2
src/Node.js
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@@ -715,7 +715,7 @@
//if width and height are defined, create new canvas to draw on, else reuse stage buffer canvas
if(config.width && config.height) {
canvas = new Kinetic.SceneCanvas(config.width, config.height);
canvas = new Kinetic.SceneCanvas(config.width, config.height, 1);
}
else {
canvas = this.getStage().bufferCanvas;

2
src/Stage.js
View File

@@ -266,7 +266,7 @@
this.content.style.width = width + 'px';
this.content.style.height = height + 'px';
this.bufferCanvas.setSize(width, height);
this.bufferCanvas.setSize(width, height, 1);
this.hitCanvas.setSize(width, height);
// set user defined layer dimensions
var layers = this.children;