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Merge branch 'imageLoaderPatch' of github.com:rdlester/openseadragon into rdlester-imageLoaderPatch

Browse Source 
fixed Conflicts:
	src/drawer.js
This commit is contained in:
Ian Gilman 2014-11-07 15:29:34 -08:00
commit fab33ea1af
2 changed files with 60 additions and 49 deletions
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102
src/drawer.js
View File

@ -49,7 +49,7 @@ var DEVICE_SCREEN = $.getWindowSize(),
/**
* @class Drawer
* @classdesc Handles rendering of tiles for an {@link OpenSeadragon.Viewer}.
* @classdesc Handles rendering of tiles for an {@link OpenSeadragon.Viewer}.
* A new instance is created for each TileSource opened (see {@link OpenSeadragon.Viewer#drawer}).
*
* @memberof OpenSeadragon
@ -730,23 +730,10 @@ function loadTile( drawer, tile, time ) {
}
function onTileLoad( drawer, tile, time, image ) {
var insertionIndex,
cutoff,
worstTile,
worstTime,
worstLevel,
worstTileIndex,
prevTile,
prevTime,
prevLevel,
i;
tile.loading = false;
if ( drawer.midUpdate ) {
$.console.warn( "Tile load callback in middle of drawing routine." );
return;
} else if ( !image && !drawer.viewport.collectionMode ) {
if ( !image && !drawer.viewport.collectionMode ) {
$.console.log( "Tile %s failed to load: %s", tile, tile.url );
if( !drawer.debugMode ){
tile.exists = false;
@ -760,47 +747,64 @@ function onTileLoad( drawer, tile, time, image ) {
tile.loaded = true;
tile.image = image;
insertionIndex = drawer.tilesLoaded.length;
if ( drawer.tilesLoaded.length >= drawer.maxImageCacheCount ) {
cutoff = Math.ceil( Math.log( drawer.source.getTileSize(tile.level) ) / Math.log( 2 ) );
worstTile = null;
worstTileIndex = -1;
for ( i = drawer.tilesLoaded.length - 1; i >= 0; i-- ) {
prevTile = drawer.tilesLoaded[ i ];
if ( prevTile.level <= drawer.cutoff || prevTile.beingDrawn ) {
continue;
} else if ( !worstTile ) {
worstTile = prevTile;
worstTileIndex = i;
continue;
}
prevTime = prevTile.lastTouchTime;
worstTime = worstTile.lastTouchTime;
prevLevel = prevTile.level;
worstLevel = worstTile.level;
if ( prevTime < worstTime ||
( prevTime == worstTime && prevLevel > worstLevel ) ) {
worstTile = prevTile;
worstTileIndex = i;
}
if ( drawer.tilesLoaded.length < drawer.maxImageCacheCount ) {
// always safe to append things to cache
drawer.tilesLoaded[ drawer.tilesLoaded.length ] = tile;
}
else {
// need to remove something from cache,
// make sure this doesn't happen mid update
if ( !drawer.midUpdate ) {
updateTileCache( tile, drawer );
}
if ( worstTile && worstTileIndex >= 0 ) {
worstTile.unload();
insertionIndex = worstTileIndex;
else {
window.setTimeout( function() {
updateTileCache( tile, drawer );
}, 1);
}
}
drawer.tilesLoaded[ insertionIndex ] = tile;
drawer.updateAgain = true;
}
function updateTileCache( newTile, drawer ) {
var i, prevTile, prevTime, worstTime, prevLevel, worstLevel,
insertionIndex = drawer.tilesLoaded.length,
cutoff = Math.ceil( Math.log( drawer.source.getTileSize(newTile.level) ) / Math.log( 2 ) ),
worstTile = null,
worstTileIndex = -1;
for ( i = drawer.tilesLoaded.length - 1; i >= 0; i-- ) {
prevTile = drawer.tilesLoaded[ i ];
if ( prevTile.level <= drawer.cutoff || prevTile.beingDrawn ) {
continue;
} else if ( !worstTile ) {
worstTile = prevTile;
worstTileIndex = i;
continue;
}
prevTime = prevTile.lastTouchTime;
worstTime = worstTile.lastTouchTime;
prevLevel = prevTile.level;
worstLevel = worstTile.level;
if ( prevTime < worstTime ||
( prevTime == worstTime && prevLevel > worstLevel ) ) {
worstTile = prevTile;
worstTileIndex = i;
}
}
if ( worstTile && worstTileIndex >= 0 ) {
worstTile.unload();
insertionIndex = worstTileIndex;
}
drawer.tilesLoaded[ insertionIndex ] = newTile;
}
function positionTile( tile, overlap, viewport, viewportCenter, levelVisibility ){
var boundsTL = tile.bounds.getTopLeft(),

7
src/imageLoader.js
View File

@ -145,7 +145,14 @@ $.ImageLoader.prototype = {
else {
this.jobQueue.push( newJob );
}
},
/**
* Clear any unstarted image loading jobs from the queue.
* @method
*/
clear: function() {
this.jobQueue = [];
}
};