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Merge pull request #4763 from yurydelendik/canvas-rAF

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Uses rAF to interrupt the operator list execution
This commit is contained in:
Yury Delendik 2014-05-09 07:25:52 -05:00
commit fd4fc89213
4 changed files with 28 additions and 18 deletions
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16
src/display/api.js
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@ -1271,6 +1271,10 @@ var InternalRenderTask = (function InternalRenderTaskClosure() {
this.graphicsReady = false;
this.cancelled = false;
this.capability = createPromiseCapability();
// caching this-bound methods
this._continueBound = this._continue.bind(this);
this._scheduleNextBound = this._scheduleNext.bind(this);
this._nextBound = this._next.bind(this);
}
InternalRenderTask.prototype = {
@ -1309,7 +1313,7 @@ var InternalRenderTask = (function InternalRenderTaskClosure() {
operatorListChanged: function InternalRenderTask_operatorListChanged() {
if (!this.graphicsReady) {
if (!this.graphicsReadyCallback) {
this.graphicsReadyCallback = this._continue.bind(this);
this.graphicsReadyCallback = this._continueBound;
}
return;
}
@ -1330,19 +1334,23 @@ var InternalRenderTask = (function InternalRenderTaskClosure() {
return;
}
if (this.params.continueCallback) {
this.params.continueCallback(this._next.bind(this));
this.params.continueCallback(this._scheduleNextBound);
} else {
this._next();
this._scheduleNext();
}
},
_scheduleNext: function InternalRenderTask__scheduleNext() {
window.requestAnimationFrame(this._nextBound);
},
_next: function InternalRenderTask__next() {
if (this.cancelled) {
return;
}
this.operatorListIdx = this.gfx.executeOperatorList(this.operatorList,
this.operatorListIdx,
this._continue.bind(this),
this._continueBound,
this.stepper);
if (this.operatorListIdx === this.operatorList.argsArray.length) {
this.running = false;

8
src/display/canvas.js
View file

@ -746,7 +746,6 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
var commonObjs = this.commonObjs;
var objs = this.objs;
var fnId;
var deferred = Promise.resolve();
while (true) {
if (stepper && i === stepper.nextBreakPoint) {
@ -784,11 +783,10 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
return i;
}
// If the execution took longer then a certain amount of time, schedule
// to continue exeution after a short delay.
// However, this is only possible if a 'continueCallback' is passed in.
// If the execution took longer then a certain amount of time and
// `continueCallback` is specified, interrupt the execution.
if (continueCallback && Date.now() > endTime) {
deferred.then(continueCallback);
continueCallback();
return i;
}