Begin atlasing

src/gpu/GrAtlas.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.
  */
 
 #ifndef GrAtlas_DEFINED
 #define GrAtlas_DEFINED
@@ skipping 63 matching lines @@
     class ClientPlotUsage {
     public:
         bool isEmpty() const { return 0 == fPlots.count(); }
 
     private:
         SkTDArray<GrPlot*> fPlots;
 
         friend class GrAtlas;
     };
 
-    GrAtlas(GrGpu*, GrPixelConfig, const SkISize& backingTextureSize,
+    GrAtlas(GrGpu*, GrPixelConfig, GrTextureFlags flags, 
+            const SkISize& backingTextureSize,
             int numPlotsX, int numPlotsY, bool batchUploads);
     ~GrAtlas();
 
-    // add subimage of width, height dimensions to atlas
-    // returns the containing GrPlot and location relative to the backing texture
-    GrPlot* addToAtlas(ClientPlotUsage*, int width, int height, const void*, SkIPoint16*);
+    // Adds a width x height subimage to the atlas. Upon success it returns 
+    // the containing GrPlot and absolute location in the backing texture. 
+    // NULL is returned if the subimage cannot fit in the atlas.
+    // If provided, the image data will either be immediately uploaded or
+    // written to the CPU-side backing bitmap.
+    GrPlot* addToAtlas(ClientPlotUsage*, int width, int height, const void* image, SkIPoint16* loc);
 
     // remove reference to this plot
     void removePlot(ClientPlotUsage* usage, const GrPlot* plot);
 
     // get a plot that's not being used by the current draw
     // this allows us to overwrite this plot without flushing
     GrPlot* getUnusedPlot();
 
     GrTexture* getTexture() const {
         return fTexture;
     }
 
     void uploadPlotsToTexture();
 
 private:
     void makeMRU(GrPlot* plot);
 
-    GrGpu*        fGpu;
-    GrPixelConfig fPixelConfig;
-    GrTexture*    fTexture;
-    SkISize       fBackingTextureSize;
-    int           fNumPlotsX;
-    int           fNumPlotsY;
-    bool          fBatchUploads;
+    GrGpu*         fGpu;
+    GrPixelConfig  fPixelConfig;
+    GrTextureFlags fFlags;
+    GrTexture*     fTexture;
+    SkISize        fBackingTextureSize;
+    int            fNumPlotsX;
+    int            fNumPlotsY;
+    bool           fBatchUploads;
 
     // allocated array of GrPlots
     GrPlot*       fPlotArray;
     // LRU list of GrPlots (MRU at head - LRU at tail)
     GrPlotList    fPlotList;
 };
 
 #endif