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Added documentation in CachedFrameProcessor

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This commit is contained in:
jdescottes 2014-07-03 23:23:31 +02:00
parent fa626532ba
commit fa4e96e7e5
2 changed files with 22 additions and 4 deletions
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1
src/js/controller/PreviewFilmController.js
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@ -208,7 +208,6 @@
ns.PreviewFilmController.prototype.getCanvasForFrame = function (frame) {
var canvas = this.cachedFrameProcessor.get(frame, this.zoom);
canvas.classList.add('tile-view', 'canvas');
return canvas;
};

25
src/js/model/frame/CachedFrameProcessor.js
View File

@ -1,7 +1,8 @@
(function () {
var ns = $.namespace('pskl.model.frame');
var DEFAULT_RESET_INTERVAL = 10 * 60 *1000;
var DEFAULT_CLEAR_INTERVAL = 10 * 60 *1000;
var DEFAULT_FRAME_PROCESSOR = function (frame) {
return pskl.utils.FrameUtils.toImage(frame);
@ -13,7 +14,7 @@
ns.CachedFrameProcessor = function (cacheResetInterval) {
this.cache_ = {};
this.cacheResetInterval = cacheResetInterval || DEFAULT_RESET_INTERVAL;
this.cacheResetInterval = cacheResetInterval || DEFAULT_CLEAR_INTERVAL;
this.frameProcessor = DEFAULT_FRAME_PROCESSOR;
this.outputCloner = DEFAULT_OUTPUT_CLONER;
@ -24,14 +25,32 @@
this.cache_ = {};
};
/**
* Set the processor function that will be called when there is a cache miss
* Function with 1 argument : pskl.model.Frame
* @param {Function} frameProcessor
*/
ns.CachedFrameProcessor.prototype.setFrameProcessor = function (frameProcessor) {
this.frameProcessor = frameProcessor;
};
/**
* Set the cloner that will be called when there is a miss on the 1st level cache
* but a hit on the 2nd level cache.
* Function with 2 arguments : cached value, frame
* @param {Function} outputCloner
*/
ns.CachedFrameProcessor.prototype.setOutputCloner = function (outputCloner) {
this.outputCloner = outputCloner;
};
/**
* Retrieve the processed frame from the cache, in the (optional) namespace
* If the first level cache is empty, attempt to clone it from 2nd level cache. If second level cache is empty process the frame.
* @param {pskl.model.Frame} frame
* @param {String} namespace
* @return {Object} the processed frame
*/
ns.CachedFrameProcessor.prototype.get = function (frame, namespace) {
var processedFrame = null;
namespace = namespace || DEFAULT_NAMESPACE;
@ -48,7 +67,7 @@
} else {
var frameAsString = JSON.stringify(frame.getPixels());
if (this.cache_[frameAsString]) {
processedFrame = this.outputCloner(this.cache_[frameAsString]);
processedFrame = this.outputCloner(this.cache_[frameAsString], frame);
} else {
processedFrame = this.frameProcessor(frame);
this.cache_[frameAsString] = processedFrame;