/* * Copyright 2015 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "src/gpu/text/GrTextBlobCache.h" DECLARE_SKMESSAGEBUS_MESSAGE(GrTextBlobCache::PurgeBlobMessage) static inline bool SkShouldPostMessageToBus( const GrTextBlobCache::PurgeBlobMessage& msg, uint32_t msgBusUniqueID) { return msg.fContextID == msgBusUniqueID; } GrTextBlobCache::~GrTextBlobCache() { this->freeAll(); } void GrTextBlobCache::freeAll() { fBlobIDCache.foreach([this](uint32_t, BlobIDCacheEntry* entry) { for (const auto& blob : entry->fBlobs) { fBlobList.remove(blob.get()); } }); fBlobIDCache.reset(); fCurrentSize = 0; // There should be no allocations in the memory pool at this point SkASSERT(fBlobList.isEmpty()); } void GrTextBlobCache::PostPurgeBlobMessage(uint32_t blobID, uint32_t cacheID) { SkASSERT(blobID != SK_InvalidGenID); SkMessageBus::Post(PurgeBlobMessage(blobID, cacheID)); } void GrTextBlobCache::purgeStaleBlobs() { SkTArray msgs; fPurgeBlobInbox.poll(&msgs); for (const auto& msg : msgs) { auto* idEntry = fBlobIDCache.find(msg.fBlobID); if (!idEntry) { // no cache entries for id continue; } // remove all blob entries from the LRU list for (const auto& blob : idEntry->fBlobs) { fCurrentSize -= blob->size(); fBlobList.remove(blob.get()); } // drop the idEntry itself (unrefs all blobs) fBlobIDCache.remove(msg.fBlobID); } } void GrTextBlobCache::checkPurge(GrTextBlob* blob) { // First, purge all stale blob IDs. this->purgeStaleBlobs(); // If we are still over budget, then unref until we are below budget again if (fCurrentSize > fSizeBudget) { BitmapBlobList::Iter iter; iter.init(fBlobList, BitmapBlobList::Iter::kTail_IterStart); GrTextBlob* lruBlob = nullptr; while (fCurrentSize > fSizeBudget && (lruBlob = iter.get()) && lruBlob != blob) { // Backup the iterator before removing and unrefing the blob iter.prev(); this->remove(lruBlob); } // If we break out of the loop with lruBlob == blob, then we haven't purged enough // use the call back and try to free some more. If we are still overbudget after this, // then this single textblob is over our budget if (blob && lruBlob == blob) { (*fCallback)(fData); } #ifdef SPEW_BUDGET_MESSAGE if (fCurrentSize > fSizeBudget) { SkDebugf("Single textblob is larger than our whole budget"); } #endif } }