The Tor Browser: gfx/skia/trunk/src/effects/gradients/SkBitmapCache.cpp@b8a032363ba2 (annotated)

gfx/skia/trunk/src/effects/gradients/SkBitmapCache.cpp@b8a032363ba2 (annotated)

gfx/skia/trunk/src/effects/gradients/SkBitmapCache.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkBitmapCache.h"
 struct SkBitmapCache::Entry {
     Entry*      fPrev;
     Entry*      fNext;
     void*       fBuffer;
     size_t      fSize;
     SkBitmap    fBitmap;
     Entry(const void* buffer, size_t size, const SkBitmap& bm)
             : fPrev(NULL),
               fNext(NULL),
               fBitmap(bm) {
         fBuffer = sk_malloc_throw(size);
         fSize = size;
         memcpy(fBuffer, buffer, size);
     }
     ~Entry() { sk_free(fBuffer); }
     bool equals(const void* buffer, size_t size) const {
         return (fSize == size) && !memcmp(fBuffer, buffer, size);
     }
 };
 SkBitmapCache::SkBitmapCache(int max) : fMaxEntries(max) {
     fEntryCount = 0;
     fHead = fTail = NULL;
     this->validate();
 }
 SkBitmapCache::~SkBitmapCache() {
     this->validate();
     Entry* entry = fHead;
     while (entry) {
         Entry* next = entry->fNext;
         delete entry;
         entry = next;
     }
 }
 SkBitmapCache::Entry* SkBitmapCache::detach(Entry* entry) const {
     if (entry->fPrev) {
         SkASSERT(fHead != entry);
         entry->fPrev->fNext = entry->fNext;
     } else {
         SkASSERT(fHead == entry);
         fHead = entry->fNext;
     }
     if (entry->fNext) {
         SkASSERT(fTail != entry);
         entry->fNext->fPrev = entry->fPrev;
     } else {
         SkASSERT(fTail == entry);
         fTail = entry->fPrev;
     }
     return entry;
 }
 void SkBitmapCache::attachToHead(Entry* entry) const {
     entry->fPrev = NULL;
     entry->fNext = fHead;
     if (fHead) {
         fHead->fPrev = entry;
     } else {
         fTail = entry;
     }
     fHead = entry;
 }
 bool SkBitmapCache::find(const void* buffer, size_t size, SkBitmap* bm) const {
     AutoValidate av(this);
     Entry* entry = fHead;
     while (entry) {
         if (entry->equals(buffer, size)) {
             if (bm) {
                 *bm = entry->fBitmap;
             }
             // move to the head of our list, so we purge it last
             this->detach(entry);
             this->attachToHead(entry);
             return true;
         }
         entry = entry->fNext;
     }
     return false;
 }
 void SkBitmapCache::add(const void* buffer, size_t len, const SkBitmap& bm) {
     AutoValidate av(this);
     if (fEntryCount == fMaxEntries) {
         SkASSERT(fTail);
         delete this->detach(fTail);
         fEntryCount -= 1;
     }
     Entry* entry = SkNEW_ARGS(Entry, (buffer, len, bm));
     this->attachToHead(entry);
     fEntryCount += 1;
 }
 ///////////////////////////////////////////////////////////////////////////////
 #ifdef SK_DEBUG
 void SkBitmapCache::validate() const {
     SkASSERT(fEntryCount >= 0 && fEntryCount <= fMaxEntries);
     if (fEntryCount > 0) {
         SkASSERT(NULL == fHead->fPrev);
         SkASSERT(NULL == fTail->fNext);
         if (fEntryCount == 1) {
             SkASSERT(fHead == fTail);
         } else {
             SkASSERT(fHead != fTail);
         }
         Entry* entry = fHead;
         int count = 0;
         while (entry) {
             count += 1;
             entry = entry->fNext;
         }
         SkASSERT(count == fEntryCount);
         entry = fTail;
         while (entry) {
             count -= 1;
             entry = entry->fPrev;
         }
         SkASSERT(0 == count);
     } else {
         SkASSERT(NULL == fHead);
         SkASSERT(NULL == fTail);
     }
 }
 #endif

The Tor Browser / annotate

gfx/skia/trunk/src/effects/gradients/SkBitmapCache.cpp@b8a032363ba2 (annotated)

gfx/skia/trunk/src/effects/gradients/SkBitmapCache.cpp