Implement text rendering with NVPR

include/gpu/GrContext.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 GrContext_DEFINED
 #define GrContext_DEFINED
 
@@ skipping 17 matching lines @@
 class GrIndexBuffer;
 class GrIndexBufferAllocPool;
 class GrInOrderDrawBuffer;
 class GrOvalRenderer;
 class GrPath;
 class GrPathRenderer;
 class GrResourceEntry;
 class GrResourceCache;
 class GrStencilBuffer;
 class GrTestTarget;
+class GrTextContext;
 class GrTextureParams;
 class GrVertexBuffer;
 class GrVertexBufferAllocPool;
 class GrSoftwarePathRenderer;
 class SkStrokeRec;
 
 class SK_API GrContext : public SkRefCnt {
 public:
     SK_DECLARE_INST_COUNT(GrContext)
 
@@ skipping 61 matching lines @@
     /**
      * Returns the number of bytes of GPU memory hosted by the texture cache.
      */
     size_t getGpuTextureCacheBytes() const;
 
     /**
      * Returns the number of resources hosted by the texture cache.
      */
     int getGpuTextureCacheResourceCount() const;
 
+    /**
+     * Creates a new text rendering context that is optimal for the
+     * render target and the context. Caller assumes the ownership
+     * of the returned object. The returned object must be deleted
+     * before the context is destroyed.
+     */
+    GrTextContext* createTextContext(GrRenderTarget*,
+                                     const SkDeviceProperties&);
+
     ///////////////////////////////////////////////////////////////////////////
     // Textures
 
     /**
      * Creates a new entry, based on the specified key and texture and returns it. The caller owns a
      * ref on the returned texture which must be balanced by a call to unref.
      *
      * @param params    The texture params used to draw a texture may help determine
      *                  the cache entry used. (e.g. different versions may exist
      *                  for different wrap modes on GPUs with limited NPOT
@@ skipping 811 matching lines @@
     GrTexture* createResizedTexture(const GrTextureDesc& desc,
                                     const GrCacheID& cacheID,
                                     void* srcData,
                                     size_t rowBytes,
                                     bool filter);
 
     // Needed so GrTexture's returnToCache helper function can call
     // addExistingTextureToCache
     friend class GrTexture;
     friend class GrStencilAndCoverPathRenderer;
+    friend class GrStencilAndCoverTextContext;
 
     // Add an existing texture to the texture cache. This is intended solely
     // for use with textures released from an GrAutoScratchTexture.
     void addExistingTextureToCache(GrTexture* texture);
 
     /**
      * These functions create premul <-> unpremul effects if it is possible to generate a pair
      * of effects that make a readToUPM->writeToPM->readToUPM cycle invariant. Otherwise, they
      * return NULL.
      */
@@ skipping 102 matching lines @@
     }
 
     GrTexture* texture() { return fTexture; }
 
 private:
     GrContext*                    fContext;
     GrTexture*                    fTexture;
 };
 
 #endif