Add SkSourceGammaTreatment enum so we know how to create mips

src/gpu/GrTextureParamsAdjuster.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 GrTextureMaker_DEFINED
 #define GrTextureMaker_DEFINED
 
@@ skipping 46 matching lines @@
      *                                         constraintRect (without consideration of filter
      *                                         width, just the raw coords).
      * @param filterOrNullForBicubic           If non-null indicates the filter mode. If null means
      *                                         use bicubic filtering.
      **/
     virtual const GrFragmentProcessor* createFragmentProcessor(
                                     const SkMatrix& textureMatrix,
                                     const SkRect& constraintRect,
                                     FilterConstraint filterConstraint,
                                     bool coordsLimitedToConstraintRect,
-                                    const GrTextureParams::FilterMode* filterOrNullForBicubic) = 0;
+                                    const GrTextureParams::FilterMode* filterOrNullForBicubic,
+                                    bool gammaCorrect) = 0;
 
     virtual ~GrTextureProducer() {}
 
     int width() const { return fWidth; }
     int height() const { return fHeight; }
     bool isAlphaOnly() const { return fIsAlphaOnly; }
 
 protected:
     GrTextureProducer(int width, int height, bool isAlphaOnly)
         : fWidth(width)
@@ skipping 42 matching lines @@
  * The intent is not to use content area for subrect rendering. Rather, the pixels outside the
  * content area have undefined values and shouldn't be read *regardless* of filtering mode or
  * the SkCanvas::SrcRectConstraint used for subrect draws.
  */
 class GrTextureAdjuster : public GrTextureProducer {
 public:
     /** Makes the subset of the texture safe to use with the given texture parameters.
         outOffset will be the top-left corner of the subset if a copy is not made. Otherwise,
         the copy will be tight to the contents and outOffset will be (0, 0). If the copy's size
         does not match subset's dimensions then the contents are scaled to fit the copy.*/
-    GrTexture* refTextureSafeForParams(const GrTextureParams&, SkIPoint* outOffset);
+    GrTexture* refTextureSafeForParams(const GrTextureParams&, bool gammaCorrect,
+                                       SkIPoint* outOffset);
 
     const GrFragmentProcessor* createFragmentProcessor(
                                 const SkMatrix& textureMatrix,
                                 const SkRect& constraintRect,
                                 FilterConstraint,
                                 bool coordsLimitedToConstraintRect,
-                                const GrTextureParams::FilterMode* filterOrNullForBicubic) override;
+                                const GrTextureParams::FilterMode* filterOrNullForBicubic,
+                                bool gammaCorrect) override;
 
 protected:
     /** The whole texture is content. */
     explicit GrTextureAdjuster(GrTexture* original, bool isAlphaOnly)
         : INHERITED(original->width(), original->height(), isAlphaOnly)
         , fOriginal(original) {}
 
     GrTextureAdjuster(GrTexture* original, const SkIRect& contentArea, bool isAlphaOnly);
 
     GrTexture* originalTexture() const { return fOriginal; }
@@ skipping 12 matching lines @@
 
 /**
  * Base class for sources that start out as something other than a texture (encoded image,
  * picture, ...).
  */
 class GrTextureMaker : public GrTextureProducer {
 public:
     /** Returns a texture that is safe for use with the params. If the size of the returned texture
         does not match width()/height() then the contents of the original must be scaled to fit
         the texture. */
-    GrTexture* refTextureForParams(const GrTextureParams&);
+    GrTexture* refTextureForParams(const GrTextureParams&, bool gammaCorrect);
 
     const GrFragmentProcessor* createFragmentProcessor(
                                 const SkMatrix& textureMatrix,
                                 const SkRect& constraintRect,
                                 FilterConstraint filterConstraint,
                                 bool coordsLimitedToConstraintRect,
-                                const GrTextureParams::FilterMode* filterOrNullForBicubic) override;
+                                const GrTextureParams::FilterMode* filterOrNullForBicubic,
+                                bool gammaCorrect) override;
 
 protected:
     GrTextureMaker(GrContext* context, int width, int height, bool isAlphaOnly)
         : INHERITED(width, height, isAlphaOnly)
         , fContext(context) {}
 
     /**
      *  Return the maker's "original" texture. It is the responsibility of the maker to handle any
      *  caching of the original if desired.
      */
-    virtual GrTexture* refOriginalTexture(bool willBeMipped) = 0;
+    virtual GrTexture* refOriginalTexture(bool willBeMipped, bool gammaCorrect) = 0;
 
     /**
      *  Return a new (uncached) texture that is the stretch of the maker's original.
      *
      *  The base-class handles general logic for this, and only needs access to the following
      *  method:
      *  - refOriginalTexture()
      *
      *  Subclass may override this if they can handle creating the texture more directly than
      *  by copying.
      */
-    virtual GrTexture* generateTextureForParams(const CopyParams&, bool willBeMipped);
+    virtual GrTexture* generateTextureForParams(const CopyParams&, bool willBeMipped,
+                                                bool gammaCorrect);
 
     GrContext* context() const { return fContext; }
 
 private:
     GrContext*  fContext;
 
     typedef GrTextureProducer INHERITED;
 };
 
 #endif