Add SkSourceGammaTreatment enum so we know how to create mips

src/image/SkImageShader.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapProcShader.h"
 #include "SkBitmapProvider.h"
 #include "SkImage_Base.h"
@@ skipping 68 matching lines @@
 #include "GrTextureAccess.h"
 #include "SkGr.h"
 #include "SkGrPriv.h"
 #include "effects/GrSimpleTextureEffect.h"
 #include "effects/GrBicubicEffect.h"
 #include "effects/GrSimpleTextureEffect.h"
 
 const GrFragmentProcessor* SkImageShader::asFragmentProcessor(GrContext* context,
                                                               const SkMatrix& viewM,
                                                               const SkMatrix* localMatrix,
-                                                              SkFilterQuality filterQuality) const {
+                                                              SkFilterQuality filterQuality,
+                                                              bool gammaCorrect) const {
     SkMatrix matrix;
     matrix.setIDiv(fImage->width(), fImage->height());
 
     SkMatrix lmInverse;
     if (!this->getLocalMatrix().invert(&lmInverse)) {
         return nullptr;
     }
     if (localMatrix) {
         SkMatrix inv;
         if (!localMatrix->invert(&inv)) {
             return nullptr;
         }
         lmInverse.postConcat(inv);
     }
     matrix.preConcat(lmInverse);
 
     SkShader::TileMode tm[] = { fTileModeX, fTileModeY };
 
     // Must set wrap and filter on the sampler before requesting a texture. In two places below
     // we check the matrix scale factors to determine how to interpret the filter quality setting.
     // This completely ignores the complexity of the drawVertices case where explicit local coords
     // are provided by the caller.
     bool doBicubic;
     GrTextureParams::FilterMode textureFilterMode =
     GrSkFilterQualityToGrFilterMode(filterQuality, viewM, this->getLocalMatrix(), &doBicubic);
     GrTextureParams params(tm, textureFilterMode);
-    SkAutoTUnref<GrTexture> texture(as_IB(fImage)->asTextureRef(context, params));
+    SkAutoTUnref<GrTexture> texture(as_IB(fImage)->asTextureRef(context, params, gammaCorrect));
     if (!texture) {
         return nullptr;
     }
 
     SkAutoTUnref<const GrFragmentProcessor> inner;
     if (doBicubic) {
         inner.reset(GrBicubicEffect::Create(texture, matrix, tm));
     } else {
         inner.reset(GrSimpleTextureEffect::Create(texture, matrix, params));
     }
 
     if (GrPixelConfigIsAlphaOnly(texture->config())) {
         return SkRef(inner.get());
     }
     return GrFragmentProcessor::MulOutputByInputAlpha(inner);
 }
 
 #endif