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Cleaned up tileCache code.

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This commit is contained in:
Ian Gilman 2014-08-08 16:32:43 -07:00
parent f04d538b5b
commit 94080c3180
1 changed files with 30 additions and 10 deletions
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40
src/tilecache.js
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@ -34,6 +34,14 @@
(function( $ ){
var TileRecord = function( params ) {
$.console.assert( params, "[TileCache.cacheTile] params is required" );
$.console.assert( params.tile, "[TileCache.cacheTile] params.tile is required" );
$.console.assert( params.tiledImage, "[TileCache.cacheTile] params.tiledImage is required" );
this.tile = params.tile;
this.tiledImage = params.tiledImage;
};
/**
* @class TileCache
* @classdesc
@ -56,17 +64,22 @@ $.TileCache.prototype = /** @lends OpenSeadragon.TileCache.prototype */{
return this._tilesLoaded.length;
},
cacheTile: function( tile, cutoff ) {
cutoff = cutoff || 0;
cacheTile: function( params ) {
$.console.assert( params, "[TileCache.cacheTile] params is required" );
$.console.assert( params.tile, "[TileCache.cacheTile] params.tile is required" );
$.console.assert( params.tiledImage, "[TileCache.cacheTile] params.tiledImage is required" );
var cutoff = params.cutoff || 0;
var insertionIndex = this._tilesLoaded.length;
if ( this._tilesLoaded.length >= this._maxImageCacheCount ) {
var worstTile = null;
var worstTileIndex = -1;
var prevTile, worstTime, worstLevel, prevTime, prevLevel;
var prevTile, worstTime, worstLevel, prevTime, prevLevel, prevTileRecord;
for ( var i = this._tilesLoaded.length - 1; i >= 0; i-- ) {
prevTile = this._tilesLoaded[ i ];
prevTileRecord = this._tilesLoaded[ i ];
prevTile = prevTileRecord.tile;
if ( prevTile.level <= cutoff || prevTile.beingDrawn ) {
continue;
@ -94,19 +107,26 @@ $.TileCache.prototype = /** @lends OpenSeadragon.TileCache.prototype */{
}
}
this._tilesLoaded[ insertionIndex ] = tile;
this._tilesLoaded[ insertionIndex ] = new TileRecord({
tile: params.tile,
tiledImage: params.tiledImage
});
},
/**
* Clears all tiles.
* Clears all tiles associated with the specified tiledImage.
* @method
*/
reset: function() {
clearTilesFor: function( tiledImage ) {
var tileRecord;
for ( var i = 0; i < this._tilesLoaded.length; ++i ) {
this._tilesLoaded[i].unload();
tileRecord = this._tilesLoaded[ i ];
if ( tileRecord.tiledImage === tiledImage ) {
tileRecord.tile.unload();
this._tilesLoaded.splice( i, 1 );
i--;
}
}
this._tilesLoaded = [];
}
};