blob: 8e86092d1291b6dc612385fd8bfc4f205f617e67 [file] [log] [blame]
* Copyright 2015 Google Inc.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#ifndef GrTextBlobCache_DEFINED
#define GrTextBlobCache_DEFINED
#include "include/core/SkRefCnt.h"
#include "include/private/SkMutex.h"
#include "include/private/SkTArray.h"
#include "include/private/SkTHash.h"
#include "src/core/SkMessageBus.h"
#include "src/core/SkTextBlobPriv.h"
#include "src/gpu/text/GrTextBlob.h"
#include <functional>
class GrTextBlobCache {
GrTextBlobCache(uint32_t messageBusID);
// If not already in the cache, then add it else, return the text blob from the cache.
sk_sp<GrTextBlob> addOrReturnExisting(
const SkGlyphRunList& glyphRunList, sk_sp<GrTextBlob> blob) SK_EXCLUDES(fSpinLock);
sk_sp<GrTextBlob> find(const GrTextBlob::Key& key) SK_EXCLUDES(fSpinLock);
void remove(GrTextBlob* blob) SK_EXCLUDES(fSpinLock);
void freeAll() SK_EXCLUDES(fSpinLock);
struct PurgeBlobMessage {
PurgeBlobMessage(uint32_t blobID, uint32_t contextUniqueID)
: fBlobID(blobID), fContextID(contextUniqueID) {}
uint32_t fBlobID;
uint32_t fContextID;
static void PostPurgeBlobMessage(uint32_t blobID, uint32_t cacheID);
void purgeStaleBlobs() SK_EXCLUDES(fSpinLock);
size_t usedBytes() const SK_EXCLUDES(fSpinLock);
bool isOverBudget() const SK_EXCLUDES(fSpinLock);
friend class GrTextBlobTestingPeer;
using TextBlobList = SkTInternalLList<GrTextBlob>;
struct BlobIDCacheEntry {
explicit BlobIDCacheEntry(uint32_t id);
static uint32_t GetKey(const BlobIDCacheEntry& entry);
void addBlob(sk_sp<GrTextBlob> blob);
void removeBlob(GrTextBlob* blob);
sk_sp<GrTextBlob> find(const GrTextBlob::Key& key) const;
int findBlobIndex(const GrTextBlob::Key& key) const;
uint32_t fID;
// Current clients don't generate multiple GrAtlasTextBlobs per SkTextBlob, so an array w/
// linear search is acceptable. If usage changes, we should re-evaluate this structure.
SkSTArray<1, sk_sp<GrTextBlob>> fBlobs;
void internalPurgeStaleBlobs() SK_REQUIRES(fSpinLock);
sk_sp<GrTextBlob> internalAdd(sk_sp<GrTextBlob> blob) SK_REQUIRES(fSpinLock);
void internalRemove(GrTextBlob* blob) SK_REQUIRES(fSpinLock);
void internalCheckPurge(GrTextBlob* blob = nullptr) SK_REQUIRES(fSpinLock);
static const int kDefaultBudget = 1 << 22;
mutable SkSpinlock fSpinLock;
TextBlobList fBlobList SK_GUARDED_BY(fSpinLock);
SkTHashMap<uint32_t, BlobIDCacheEntry> fBlobIDCache SK_GUARDED_BY(fSpinLock);
size_t fSizeBudget SK_GUARDED_BY(fSpinLock);
size_t fCurrentSize SK_GUARDED_BY(fSpinLock) {0};
// In practice 'messageBusID' is always the unique ID of the owning GrContext
const uint32_t fMessageBusID;
SkMessageBus<PurgeBlobMessage>::Inbox fPurgeBlobInbox SK_GUARDED_BY(fSpinLock);