respect srgb gamma when building mips

src/core/SkBitmapProcState.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapCache.h"
 #include "SkBitmapController.h"
 #include "SkBitmapProcState.h"
@@ skipping 19 matching lines @@
 extern void  Clamp_SI8_opaque_D32_filter_DX_shaderproc_neon(const void*, int, int, uint32_t*, int);
 #endif
 
 extern void Clamp_S32_opaque_D32_nofilter_DX_shaderproc(const void*, int, int, uint32_t*, int);
 
 #define   NAME_WRAP(x)  x
 #include "SkBitmapProcState_filter.h"
 #include "SkBitmapProcState_procs.h"
 
 SkBitmapProcInfo::SkBitmapProcInfo(const SkBitmapProvider& provider,
-                                   SkShader::TileMode tmx, SkShader::TileMode tmy)
+                                   SkShader::TileMode tmx, SkShader::TileMode tmy,
+                                   SkSourceGammaTreatment treatment)
     : fProvider(provider)
     , fTileModeX(tmx)
     , fTileModeY(tmy)
+    , fSrcGammaTreatment(treatment)
     , fBMState(nullptr)
 {}
 
 SkBitmapProcInfo::SkBitmapProcInfo(const SkBitmap& bm,
-                                   SkShader::TileMode tmx, SkShader::TileMode tmy)
+                                   SkShader::TileMode tmx, SkShader::TileMode tmy,
+                                   SkSourceGammaTreatment treatment)
     : fProvider(SkBitmapProvider(bm))
     , fTileModeX(tmx)
     , fTileModeY(tmy)
+    , fSrcGammaTreatment(treatment)
     , fBMState(nullptr)
 {}
 
 SkBitmapProcInfo::~SkBitmapProcInfo() {
     SkInPlaceDeleteCheck(fBMState, fBMStateStorage.get());
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 // true iff the matrix contains, at most, scale and translate elements
@@ skipping 60 matching lines @@
 
     fPixmap.reset();
     fInvMatrix = inv;
     fFilterQuality = paint.getFilterQuality();
 
     bool allow_ignore_fractional_translate = true;  // historical default
     if (kMedium_SkFilterQuality == fFilterQuality) {
         allow_ignore_fractional_translate = false;
     }
 
-    SkDefaultBitmapController controller;
+    SkDefaultBitmapController controller(fSrcGammaTreatment);
     fBMState = controller.requestBitmap(fProvider, inv, paint.getFilterQuality(),
                                         fBMStateStorage.get(), fBMStateStorage.size());
     // Note : we allow the controller to return an empty (zero-dimension) result. Should we?
     if (nullptr == fBMState || fBMState->pixmap().info().isEmpty()) {
         return false;
     }
     fPixmap = fBMState->pixmap();
     fInvMatrix = fBMState->invMatrix();
     fRealInvMatrix = fBMState->invMatrix();
     fPaintColor = paint.getColor();
@@ skipping 674 matching lines @@
             *dst++ = src[index];
             fx += dx;
         }
     } else {
         for (int i = 0; i < count; ++i) {
             dst[i] = src[SkClampMax(SkFractionalIntToInt(fx), maxX)];
             fx += dx;
         }
     }
 }