Add CPU backing store for GrAtlas to reduce texture uploads

src/gpu/GrTextStrike.h

 
 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 
@@ skipping 72 matching lines @@
     // make an unused plot available
     bool freeUnusedPlot(GrTextStrike* preserveStrike);
 
     // testing
     int countStrikes() const { return fCache.getArray().count(); }
     const GrTextStrike* strikeAt(int index) const {
         return fCache.getArray()[index];
     }
     GrTextStrike* getHeadStrike() const { return fHead; }
 
+    void updateTextures() {
+        for (int i = 0; i < kAtlasCount; ++i) {
+            if (fAtlasMgr[i]) {
+                fAtlasMgr[i]->uploadPlotsToTexture();
+            }
+        }
+    }
+
 #ifdef SK_DEBUG
     void validate() const;
 #else
     void validate() const {}
 #endif
 
 #ifdef SK_DEVELOPER
     void dump() const;
 #endif
 
@@ skipping 17 matching lines @@
 
     GrGpu*      fGpu;
     GrAtlasMgr* fAtlasMgr[kAtlasCount];
 
     GrTextStrike* generateStrike(GrFontScaler*, const Key&);
     inline void detachStrikeFromList(GrTextStrike*);
     void purgeStrike(GrTextStrike* strike);
 };
 
 #endif