Introduce GrColorSpaceXform, for gamut conversion on textures

src/core/SkBitmapProcShader.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 "SkBitmapProcShader.h"
 #include "SkBitmapProcState.h"
 #include "SkBitmapProvider.h"
@@ skipping 442 matching lines @@
                                             &doBicubic);
     GrTextureParams params(tm, textureFilterMode);
     SkAutoTUnref<GrTexture> texture(GrRefCachedBitmapTexture(context, fRawBitmap, params,
                                                              gammaTreatment));
 
     if (!texture) {
         SkErrorInternals::SetError( kInternalError_SkError,
                                     "Couldn't convert bitmap to texture.");
         return nullptr;
     }
-
+    SkColorSpace* dstColorSpace = nullptr; // XFORMTODO
+    sk_sp<GrColorSpaceXform> colorSpaceXform = GrColorSpaceXform::Make(fRawBitmap.colorSpace(),
+                                                                       dstColorSpace);
     sk_sp<GrFragmentProcessor> inner;
     if (doBicubic) {
-        inner = GrBicubicEffect::Make(texture, matrix, tm);
+        inner = GrBicubicEffect::Make(texture, std::move(colorSpaceXform), matrix, tm);
     } else {
-        inner = GrSimpleTextureEffect::Make(texture, matrix, params);
+        inner = GrSimpleTextureEffect::Make(texture, std::move(colorSpaceXform), matrix, params);
     }
 
     if (kAlpha_8_SkColorType == fRawBitmap.colorType()) {
         return GrFragmentProcessor::MulOutputByInputUnpremulColor(std::move(inner));
     }
     return GrFragmentProcessor::MulOutputByInputAlpha(std::move(inner));
 }
 
 #endif