use new PurgeFontCache() api

git-svn-id: http://skia.googlecode.com/svn/trunk@2633 2bbb7eff-a529-9590-31e7-b0007b416f81

bench/FontScalerBench.cpp

@@ -37,7 +37,8 @@ protected:
 
         // this is critical - we want to time the creation process, so we
         // explicitly flush our cache before each run
-        SkGraphics::SetFontCacheUsed(0);
+        SkGraphics::PurgeFontCache();
+
         for (int ps = 9; ps <= 24; ps += 2) {
             paint.setTextSize(SkIntToScalar(ps));
             canvas->drawText(fText.c_str(), fText.size(),

include/core/SkGraphics.h

@@ -23,20 +23,6 @@ public:
      */
     static void GetVersion(int32_t* major, int32_t* minor, int32_t* patch);
 
-    // Font Cache routines
-
-    /**
-     *  Return the (approximate) number of bytes used by the font cache.
-     */
-    static size_t GetFontCacheUsed();
-    
-    /**
-     *  Attempt to purge the font cache until <= the specified amount remains
-     *  in the cache. Specifying 0 will attempt to purge the entire cache.
-     *  Returns true if some amount was purged from the font cache.
-     */
-    static bool SetFontCacheUsed(size_t usageInBytes);
-
     /**
      *  Return the max number of bytes that should be used by the font cache.
      *  If the cache needs to allocate more, it will purge previous entries.
@@ -53,6 +39,13 @@ public:
      */
     static size_t SetFontCacheLimit(size_t bytes);
 
+    /**
+     *  For debugging purposes, this will attempt to purge the font cache. It
+     *  does not change the limit, but will cause subsequent font measures and
+     *  draws to be recreated, since they will no longer be in the cache.
+     */
+    static void PurgeFontCache();
+
 private:
     /** This is automatically called by SkGraphics::Init(), and must be
         implemented by the host OS. This allows the host OS to register a callback

samplecode/SampleApp.cpp

@@ -1434,9 +1434,6 @@ bool SampleWindow::onHandleChar(SkUnichar uni) {
     }
 
     switch (uni) {
-        case 'd':
-            SkGraphics::SetFontCacheUsed(0);
-            return true;
         case 'f':
             // only 
             toggleFPS();

src/core/SkGraphics.cpp

@@ -113,6 +113,8 @@ void SkGraphics::Init() {
         SkDebugf("SkGraphics: sizeof(%s) = %d\n",
                  gTypeSize[i].fTypeName, gTypeSize[i].fSizeOf);
     }
+    SkDebugf("SkGraphics: font cache limit %dK\n",
+             GetFontCacheLimit() >> 10);
 
 #endif
 }
@@ -123,19 +125,11 @@ void SkGraphics::Init() {
 #include "SkTypefaceCache.h"
 
 void SkGraphics::Term() {
-    SkGraphics::SetFontCacheUsed(0);
+    SkGlyphCache::SetCacheUsed(0);
     SkTypefaceCache::PurgeAll();
     SkGlobals::Term();
 }
 
-size_t SkGraphics::GetFontCacheUsed() {
-    return SkGlyphCache::GetCacheUsed();
-}
-
-bool SkGraphics::SetFontCacheUsed(size_t usageInBytes) {
-    return SkGlyphCache::SetCacheUsed(usageInBytes);
-}
-
 #ifndef SK_DEFAULT_FONT_CACHE_LIMIT
     #define SK_DEFAULT_FONT_CACHE_LIMIT (2 * 1024 * 1024)
 #endif
@@ -157,9 +151,13 @@ size_t SkGraphics::SetFontCacheLimit(size_t bytes) {
     gFontCacheLimit = bytes;
     
     // trigger a purge if the new size is smaller that our currently used amount
-    if (bytes < GetFontCacheUsed()) {
-        SetFontCacheUsed(bytes);
+    if (bytes < SkGlyphCache::GetCacheUsed()) {
+        SkGlyphCache::SetCacheUsed(bytes);
     }
     return prev;
 }
 
+void SkGraphics::PurgeFontCache() {
+    SkGlyphCache::SetCacheUsed(0);
+}
+