cc: Specify rasterization color space

ui/gfx/color_space.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gfx/color_space.h"
 
 #include <map>
 
 #include "base/lazy_instance.h"
 #include "base/synchronization/lock.h"
@@ skipping 349 matching lines @@
 
   // Use the parametric transfer function if no other option is available.
   SkColorSpaceTransferFn fn;
   if (!GetTransferFunction(&fn)) {
     DLOG(ERROR) << "Failed to parameterize transfer function for SkColorSpace";
     return nullptr;
   }
   return SkColorSpace::MakeRGB(fn, to_xyz_d50);
 }
 
+sk_sp<SkColorSpace> ColorSpace::ToNonlinearBlendedSkColorSpace() const {
+  if (!IsValid()) {
+    DLOG(ERROR) << "Cannot create SkColorSpace for invalid space.";
+    return nullptr;
+  }
+  if (matrix_ != MatrixID::RGB) {
+    DLOG(ERROR) << "Not creating non-RGB SkColorSpace";
+    return nullptr;
+  }
+  if (range_ != RangeID::FULL) {
+    DLOG(ERROR) << "Not creating non-full-range SkColorSpace";
+    return nullptr;
+  }
+
+  SkMatrix44 primaries;
+  GetPrimaryMatrix(&primaries);
+  SkColorSpaceTransferFn tr_fn;
+  bool get_tr_fn_result = GetTransferFunction(&tr_fn);
+  if (!get_tr_fn_result) {
+    DLOG(ERROR) << "Failed to parameterize transfer function for SkColorSpace";
+    CreateSRGB().GetTransferFunction(&tr_fn);
+  }
+  sk_sp<SkColorSpace> result = SkColorSpace::MakeRGB(
+      tr_fn, primaries, SkColorSpace::kNonLinearBlending_ColorSpaceFlag);
+  if (!result) {
+    DLOG(ERROR) << "Failed to create nonlinearly blended SkColorSpace";
+    CreateSRGB().GetTransferFunction(&tr_fn);
+  }
+  return result;
+}
+
 bool ColorSpace::GetICCProfile(ICCProfile* icc_profile) const {
   if (!IsValid())
     return false;
 
   // If this was created from an ICC profile, retrieve that exact profile.
   ICCProfile result;
   if (ICCProfile::FromId(icc_profile_id_, false, icc_profile))
     return true;
 
   // Otherwise, construct an ICC profile based on the best approximated
@@ skipping 353 matching lines @@
     case MatrixID::BT2020_NCL:
     case MatrixID::BT2020_CL:
     case MatrixID::YDZDX:
       matrix->setScale(255.0f/219.0f, 255.0f/224.0f, 255.0f/224.0f);
       matrix->postTranslate(-16.0f/219.0f, -15.5f/224.0f, -15.5f/224.0f);
       break;
   }
 }
 
 }  // namespace gfx