Add SkSourceGammaTreatment enum so we know how to create mips

src/core/SkImageCacherator.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkImageCacherator_DEFINED
 #define SkImageCacherator_DEFINED
 
@@ skipping 30 matching lines @@
 
     /**
      *  Returns a ref() on the texture produced by this generator. The caller must call unref()
      *  when it is done. Will return nullptr on failure.
      *
      *  If not NULL, the client will be notified (->notifyAddedToCache()) when resources are
      *  added to the cache on its behalf.
      *
      *  The caller is responsible for calling texture->unref() when they are done.
      */
-    GrTexture* lockAsTexture(GrContext*, const GrTextureParams&, const SkImage* client,
+    GrTexture* lockAsTexture(GrContext*, const GrTextureParams&,
+                             SkSourceGammaTreatment gammaTreatment, const SkImage* client,
                              SkImage::CachingHint = SkImage::kAllow_CachingHint);
 
     /**
      *  If the underlying src naturally is represented by an encoded blob (in SkData), this returns
      *  a ref to that data. If not, it returns null.
      *
      *  If a GrContext is specified, then the caller is only interested in gpu-specific encoded
      *  formats, so others (e.g. PNG) can just return nullptr.
      */
     SkData* refEncoded(GrContext*);
 
     // Only return true if the generate has already been cached.
     bool lockAsBitmapOnlyIfAlreadyCached(SkBitmap*);
     // Call the underlying generator directly
     bool directGeneratePixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRB,
                               int srcX, int srcY);
 
 private:
     SkImageCacherator(SkImageGenerator*, const SkImageInfo&, const SkIPoint&, uint32_t uniqueID);
 
     bool generateBitmap(SkBitmap*);
     bool tryLockAsBitmap(SkBitmap*, const SkImage*, SkImage::CachingHint);
 #if SK_SUPPORT_GPU
     // Returns the texture. If the cacherator is generating the texture and wants to cache it,
     // it should use the passed in key (if the key is valid).
     GrTexture* lockTexture(GrContext*, const GrUniqueKey& key, const SkImage* client,
-                           SkImage::CachingHint, bool willBeMipped);
+                           SkImage::CachingHint, bool willBeMipped, SkSourceGammaTreatment);
 #endif
 
     class ScopedGenerator {
         SkImageCacherator* fCacher;
     public:
         ScopedGenerator(SkImageCacherator* cacher) : fCacher(cacher) {
             fCacher->fMutexForGenerator.acquire();
         }
         ~ScopedGenerator() {
             fCacher->fMutexForGenerator.release();
         }
         SkImageGenerator* operator->() const { return fCacher->fNotThreadSafeGenerator; }
         operator SkImageGenerator*() const { return fCacher->fNotThreadSafeGenerator; }
     };
 
     SkMutex                         fMutexForGenerator;
     SkAutoTDelete<SkImageGenerator> fNotThreadSafeGenerator;
 
     const SkImageInfo   fInfo;
     const SkIPoint      fOrigin;
     const uint32_t      fUniqueID;
 
     friend class GrImageTextureMaker;
 };
 
 #endif