scratchfoundation/paper.js
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Use variable definition chaining in Raster.

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This commit is contained in:
Jürg Lehni 2011-03-08 12:55:34 +00:00
parent 6a67052090
commit 456e9f2815
1 changed files with 25 additions and 25 deletions
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50
src/item/Raster.js
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@ -40,9 +40,9 @@ var Raster = this.Raster = Item.extend({
},
setSize: function() {
var size = Size.read(arguments);
// Get reference to image before changing canvas
var image = this.getImage();
var size = Size.read(arguments),
// Get reference to image before changing canvas
image = this.getImage();
// Setting canvas internally sets _size
this.setCanvas(CanvasProvider.getCanvas(size));
// Draw image back onto new canvas
@ -68,9 +68,9 @@ var Raster = this.Raster = Item.extend({
*/
getPpi: function() {
var matrix = this.matrix;
var orig = new Point(0, 0).transform(matrix);
var u = new Point(1, 0).transform(matrix).subtract(orig);
var v = new Point(0, 1).transform(matrix).subtract(orig);
orig = new Point(0, 0).transform(matrix),
u = new Point(1, 0).transform(matrix).subtract(orig),
v = new Point(0, 1).transform(matrix).subtract(orig);
return new Size(
72 / u.getLength(),
72 / v.getLength()
@ -123,9 +123,9 @@ var Raster = this.Raster = Item.extend({
},
getSubImage: function(/* rectangle */) {
var rectangle = Rectangle.read(arguments);
var canvas = CanvasProvider.getCanvas(rectangle.getSize());
var context = canvas.getContext('2d');
var rectangle = Rectangle.read(arguments),
canvas = CanvasProvider.getCanvas(rectangle.getSize()),
context = canvas.getContext('2d');
context.drawImage(this.getCanvas(), rectangle.x, rectangle.y,
canvas.width, canvas.height, 0, 0, canvas.width, canvas.height);
return canvas;
@ -144,10 +144,10 @@ var Raster = this.Raster = Item.extend({
* @param y
*/
getPixel: function() {
var point = Point.read(arguments);
var ctx = this.getContext();
var pixels = ctx.getImageData(point.x + 0.5, point.y + 0.5, 1, 1).data;
var channels = [];
var point = Point.read(arguments),
ctx = this.getContext(),
pixels = ctx.getImageData(point.x + 0.5, point.y + 0.5, 1, 1).data,
channels = [];
for (var i = 0; i < 4; i++)
channels.push(pixels[i] / 255);
return Color.read(channels);
@ -191,8 +191,8 @@ var Raster = this.Raster = Item.extend({
}
}, new function() {
function getAverageColor(pixels) {
var channels = [0, 0, 0];
var total = 0;
var channels = [0, 0, 0],
total = 0;
for (var i = 0, l = pixels.length; i < l; i += 4) {
var alpha = pixels[i + 3];
total += alpha;
@ -234,9 +234,9 @@ var Raster = this.Raster = Item.extend({
1, 1);
}
var canvas = CanvasProvider.getCanvas(bounds.getSize());
var ctx = canvas.getContext('2d');
var delta = bounds.getTopLeft().multiply(-1);
var canvas = CanvasProvider.getCanvas(bounds.getSize()),
ctx = canvas.getContext('2d'),
delta = bounds.getTopLeft().multiply(-1);
ctx.translate(delta.x, delta.y);
if (path) {
var style = object.getStyle();
@ -244,8 +244,8 @@ var Raster = this.Raster = Item.extend({
ctx.clip();
path.setStyle(style);
}
var matrix = this.matrix.clone();
var transMatrix = Matrix.getTranslateInstance(delta);
var matrix = this.matrix.clone(),
transMatrix = Matrix.getTranslateInstance(delta);
matrix.preConcatenate(transMatrix);
matrix.applyToContext(ctx);
ctx.drawImage(this._canvas || this._image,
@ -254,13 +254,13 @@ var Raster = this.Raster = Item.extend({
} else {
image = this.image;
}
var size = new Size(32);
var sampleCanvas = CanvasProvider.getCanvas(size);
var ctx = sampleCanvas.getContext('2d');
var size = new Size(32),
sampleCanvas = CanvasProvider.getCanvas(size),
ctx = sampleCanvas.getContext('2d');
ctx.drawImage(image, 0, 0, size.width, size.height);
var pixels = ctx.getImageData(0.5, 0.5,
size.width, size.height).data;
var color = getAverageColor(pixels);
size.width, size.height).data,
color = getAverageColor(pixels);
CanvasProvider.returnCanvas(sampleCanvas);
if (image instanceof HTMLCanvasElement)
CanvasProvider.returnCanvas(image);