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Victor Michnowicz
2014-05-09 10:20:44 -04:00
parent 2abcadd9e6
commit 7b214b2baa
2 changed files with 27 additions and 24 deletions
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1
src/BaseLayer.js
View File

@@ -47,7 +47,6 @@
clear: function(bounds) {
this.getContext().clear(bounds);
this.getHitCanvas().getContext().clear(bounds);
this.imageData = null;
return this;
},
// extend Node.prototype.setZIndex

50
src/Layer.js
View File

@@ -92,31 +92,34 @@
return null;
}
},
_getImageData: function(x, y) {
var width = this.hitCanvas.width || 1,
height = this.hitCanvas.height || 1;
/**
* Get ImageData.data array for an individual pixel on the hit canvas.
* Data is cached as getImageData is an expensive method to call often.
*
* @param {Number} x
* @param {Number} x
* @returns {Array} One-dimensional array containing the data in the RGBA order, with integer values between 0 and 255
*/
_getImageData: function(x, y) {
var width = this.hitCanvas.width || 1,
height = this.hitCanvas.height || 1,
index = (y * width ) + x;
if (!this.imageData) {
this.imageData = this.hitCanvas.context._context.getImageData(0, 0, width, height);
}
if (!this.imageData) {
this.imageData = this.hitCanvas.context._context.getImageData(0, 0, width, height);
}
if (this.imageData && typeof x === 'number' && typeof y === 'number') {
var index = (y * width ) + x;
return [
this.imageData.data[4 * index + 0] , // Red value
this.imageData.data[4 * index + 1], // Green value
this.imageData.data[4 * index + 2], // Blue value
this.imageData.data[4 * index + 3] // Alpha val
];
}
return this.imageData || null;
},
return [
this.imageData.data[4 * index + 0] , // Red
this.imageData.data[4 * index + 1], // Green
this.imageData.data[4 * index + 2], // Blue
this.imageData.data[4 * index + 3] // Alpha
];
},
_getIntersection: function(pos) {
var p = this._getImageData(pos.x, pos.y),
p3 = p[3],
colorKey, shape;
var p = this._getImageData(pos.x, pos.y),
p3 = p[3],
colorKey, shape;
// fully opaque pixel
if(p3 === 255) {
@@ -173,7 +176,7 @@
}
Kinetic.Container.prototype.drawHit.call(this, canvas, top);
this.imageData = null;
this.imageData = null; // Clear imageData cache
return this;
},
/**
@@ -192,6 +195,7 @@
clear: function(bounds) {
this.getContext().clear(bounds);
this.getHitCanvas().getContext().clear(bounds);
this.imageData = null; // Clear imageData cache
return this;
},
// extend Node.prototype.setVisible