Add SkSourceGammaTreatment enum so we know how to create mips

src/core/SkLightingShader.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 "SkBitmapProcState.h"
 #include "SkColor.h"
 #include "SkEmptyShader.h"
@@ skipping 57 matching lines @@
         (void)fNormLocalMatrix.getType();
 
     }
 
     bool isOpaque() const override;
 
 #if SK_SUPPORT_GPU
     const GrFragmentProcessor* asFragmentProcessor(GrContext*,
                                                    const SkMatrix& viewM,
                                                    const SkMatrix* localMatrix,
-                                                   SkFilterQuality) const override;
+                                                   SkFilterQuality,
+                                                   SkSourceGammaTreatment) const override;
 #endif
 
     class LightingShaderContext : public SkShader::Context {
     public:
         // The context takes ownership of the states. It will call their destructors
         // but will NOT free the memory.
         LightingShaderContext(const SkLightingShaderImpl&, const ContextRec&,
                               SkBitmapProcState* diffuseState, SkBitmapProcState* normalState);
         ~LightingShaderContext() override;
 
@@ skipping 254 matching lines @@
             return false;
         }
         lmInverse.postConcat(inv);
     }
     result->preConcat(lmInverse);
 
     return true;
 }
 
 const GrFragmentProcessor* SkLightingShaderImpl::asFragmentProcessor(
-                                                             GrContext* context,
-                                                             const SkMatrix& viewM,
-                                                             const SkMatrix* localMatrix,
-                                                             SkFilterQuality filterQuality) const {
+                                                     GrContext* context,
+                                                     const SkMatrix& viewM,
+                                                     const SkMatrix* localMatrix,
+                                                     SkFilterQuality filterQuality,
+                                                     SkSourceGammaTreatment gammaTreatment) const {
     // we assume diffuse and normal maps have same width and height
     // TODO: support different sizes
     SkASSERT(fDiffuseMap.width() == fNormalMap.width() &&
              fDiffuseMap.height() == fNormalMap.height());
     SkMatrix diffM, normM;
 
     if (!make_mat(fDiffuseMap, this->getLocalMatrix(), localMatrix, &diffM)) {
         return nullptr;
     }
 
@@ skipping 12 matching lines @@
     GrTextureParams::FilterMode normFilterMode = GrSkFilterQualityToGrFilterMode(
                                         SkTMin(filterQuality, kMedium_SkFilterQuality),
                                         viewM,
                                         fNormLocalMatrix,
                                         &doBicubic);
     SkASSERT(!doBicubic);
 
     // TODO: support other tile modes
     GrTextureParams diffParams(kClamp_TileMode, diffFilterMode);
     SkAutoTUnref<GrTexture> diffuseTexture(GrRefCachedBitmapTexture(context,
-                                                                    fDiffuseMap, diffParams));
+                                                                    fDiffuseMap, diffParams,
+                                                                    gammaTreatment));
     if (!diffuseTexture) {
         SkErrorInternals::SetError(kInternalError_SkError, "Couldn't convert bitmap to texture.");
         return nullptr;
     }
 
     GrTextureParams normParams(kClamp_TileMode, normFilterMode);
     SkAutoTUnref<GrTexture> normalTexture(GrRefCachedBitmapTexture(context,
-                                                                   fNormalMap, normParams));
+                                                                   fNormalMap, normParams,
+                                                                   gammaTreatment));
     if (!normalTexture) {
         SkErrorInternals::SetError(kInternalError_SkError, "Couldn't convert bitmap to texture.");
         return nullptr;
     }
 
     SkAutoTUnref<const GrFragmentProcessor> inner (
         new LightingFP(diffuseTexture, normalTexture, diffM, normM, diffParams, normParams, fLights,
                        fInvNormRotation));
     return GrFragmentProcessor::MulOutputByInputAlpha(inner);
 }
@@ skipping 314 matching lines @@
                                             invNormRotation, diffLocalM, normLocalM);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkLightingShader)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkLightingShaderImpl)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END
 
 ///////////////////////////////////////////////////////////////////////////////