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Remove TryCatch in canvas fill

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As verified by @Rob--W, the evenodd fill rule works correctly in all supported browsers. This now allows optimization by JS engines.

This fixes #5458
This commit is contained in:
Fabian Lange 2014-11-09 13:53:50 +01:00
parent 9f5abd70d7
commit 063ca95f5f
2 changed files with 6 additions and 14 deletions
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14
src/display/canvas.js
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@ -1096,12 +1096,7 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
ctx.fill();
ctx.mozFillRule = 'nonzero';
} else {
try {
ctx.fill('evenodd');
} catch (ex) {
// shouldn't really happen, but browsers might think differently
ctx.fill();
}
ctx.fill('evenodd');
}
this.pendingEOFill = false;
} else {
@ -2110,12 +2105,7 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
ctx.clip();
ctx.mozFillRule = 'nonzero';
} else {
try {
ctx.clip('evenodd');
} catch (ex) {
// shouldn't really happen, but browsers might think differently
ctx.clip();
}
ctx.clip('evenodd');
}
} else {
ctx.clip();

6
web/compatibility.js
View File

@ -522,9 +522,9 @@ if (typeof PDFJS === 'undefined') {
if (polyfill) {
var contextPrototype = window.CanvasRenderingContext2D.prototype;
contextPrototype._createImageData = contextPrototype.createImageData;
var createImageData = contextPrototype.createImageData;
contextPrototype.createImageData = function(w, h) {
var imageData = this._createImageData(w, h);
var imageData = createImageData.call(this, w, h);
imageData.data.set = function(arr) {
for (var i = 0, ii = this.length; i < ii; i++) {
this[i] = arr[i];
@ -532,6 +532,8 @@ if (typeof PDFJS === 'undefined') {
};
return imageData;
};
// this closure will be kept referenced, so clear its vars
contextPrototype = null;
}
}
})();