public void changeWorkingSet(WorkingSet<String> newSet) {
// cancel any pending jobs so that we don't waste time loading images no longer needed
loaderPool.clearJobs();
if (DEBUG) {
System.out.println("RamTextureCache: changeWorkingSet:");
for (String imageId : newSet.getPrioritizedList())
System.out.printf("\t%s (pri %d)\n", imageId, newSet.getPriority(imageId));
}
synchronized (cache) // because of race with imageLoaded()
{
// adjust priorities of already cached items.
// (No longer needed items get super low priority)
cache.updatePriority(newSet);
// switch working sets
curSet = newSet;
// Start loading those which we are missing
for (String imageId : newSet.getPrioritizedList()) {
if (!cache.contains(imageId)) {
if (DEBUG) System.out.printf("RamTextureCache: not cached: %s\n", imageId);
loaderPool.addJob(imageId);
}
}
}
}
public boolean shouldLoad(String filePath, int estimatedImageSize) {
synchronized (cache) // because of race with changeWorkingSet() and getGLImage
{
// if somebody is waiting for it we have no choice
if (urgentImageIds.contains(filePath) && curSet.contains(filePath)) return true;
else {
int priority = curSet.getPriority(filePath);
// lower priority by one - ImageLoaderPool should not bother loading an image
// if it's just going to replace one of equal priority - there's no point
if (priority > Integer.MIN_VALUE) priority--;
return cache.canStore(estimatedImageSize, priority);
}
}
}
public void imageLoaded(String filePath, GLImage image) {
synchronized (cache) // because of race with changeWorkingSet() and getGLImage
{
int priority = curSet.getPriority(filePath);
boolean isInCurSet = priority > Integer.MIN_VALUE;
if (DEBUG) System.out.printf("RamTextureCache: loaded %s (pri=%d)\n", filePath, priority);
// Store the loaded image in cache
boolean full = !cache.store(filePath, image, image.nBytes, priority);
// Stop loading images if the cache is full.
// Second condition is important in case image was from previous
// working set - we don't want to abort loading the new set
if (full && isInCurSet) {
if (DEBUG) System.out.println("RamTextureCache: cache is full, stop loading");
loaderPool.clearJobs();
}
// wake up threads inside getGLImage()
cache.notifyAll();
}
}