add explicit purgeAll() so we don't get foiled by the min cache-limit

call unref instead of delete on the GrFontScaler
Review URL: https://codereview.appspot.com/6353045

git-svn-id: http://skia.googlecode.com/svn/trunk@4366 2bbb7eff-a529-9590-31e7-b0007b416f81

src/core/SkGlyphCache.cpp

@@ -356,25 +356,6 @@ void SkGlyphCache::setAuxProc(void (*proc)(void*), void* data) {
     fAuxProcList = rec;
 }
 
-void SkGlyphCache::removeAuxProc(void (*proc)(void*)) {
-    AuxProcRec* rec = fAuxProcList;
-    AuxProcRec* prev = NULL;
-    while (rec) {
-        AuxProcRec* next = rec->fNext;
-        if (rec->fProc == proc) {
-            if (prev) {
-                prev->fNext = next;
-            } else {
-                fAuxProcList = next;
-            }
-            SkDELETE(rec);
-            return;
-        }
-        prev = rec;
-        rec = next;
-    }
-}
-
 void SkGlyphCache::invokeAndRemoveAuxProcs() {
     AuxProcRec* rec = fAuxProcList;
     while (rec) {
@@ -457,6 +438,7 @@ public:
 
     size_t  getFontCacheLimit() const { return fFontCacheLimit; }
     size_t  setFontCacheLimit(size_t limit);
+    void    purgeAll(); // does not change budget
 
     // can return NULL
     static SkGlyphCache_Globals* FindTLS() {
@@ -486,7 +468,7 @@ size_t SkGlyphCache_Globals::setFontCacheLimit(size_t newLimit) {
     if (newLimit < minLimit) {
         newLimit = minLimit;
     }
-
+    
     size_t prevLimit = fFontCacheLimit;
     fFontCacheLimit = newLimit;
     
@@ -498,6 +480,11 @@ size_t SkGlyphCache_Globals::setFontCacheLimit(size_t newLimit) {
     return prevLimit;
 }
 
+void SkGlyphCache_Globals::purgeAll() {
+    SkAutoMutexAcquire    ac(fMutex);
+    SkGlyphCache::InternalFreeCache(this, fTotalMemoryUsed);
+}
+
 // Returns the shared globals
 static SkGlyphCache_Globals& getSharedGlobals() {
     // we leak this, so we don't incur any shutdown cost of the destructor
@@ -731,7 +718,7 @@ size_t SkGraphics::SetFontCacheLimit(size_t bytes) {
 }
 
 void SkGraphics::PurgeFontCache() {
-    getSharedGlobals().setFontCacheLimit(0);
+    getSharedGlobals().purgeAll();
     SkTypefaceCache::PurgeAll();
 }
 

src/core/SkGlyphCache.h

@@ -119,9 +119,6 @@ public:
     bool getAuxProcData(void (*auxProc)(void*), void** dataPtr) const;
     //! Add a proc/data pair to the glyphcache. proc should be non-null
     void setAuxProc(void (*auxProc)(void*), void* auxData);
-    //! If found, remove the proc/data pair from the glyphcache (does not
-    //  call the proc)
-    void removeAuxProc(void (*auxProc)(void*));
 
     SkScalerContext* getScalerContext() const { return fScalerContext; }
 

src/gpu/SkGpuDevice.cpp

@@ -1673,7 +1673,8 @@ void SkGpuDevice::drawVertices(const SkDraw& draw, SkCanvas::VertexMode vmode,
 ///////////////////////////////////////////////////////////////////////////////
 
 static void GlyphCacheAuxProc(void* data) {
-    delete (GrFontScaler*)data;
+    GrFontScaler* scaler = (GrFontScaler*)data;
+    SkSafeUnref(scaler);
 }
 
 static GrFontScaler* get_gr_font_scaler(SkGlyphCache* cache) {