Implement cc::FilterOperation StructTraits

cc/output/filter_operation.cc

 // Copyright 2013 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 <stddef.h>
 
 #include <algorithm>
 
 #include "base/trace_event/trace_event_argument.h"
 #include "base/values.h"
 #include "cc/base/math_util.h"
 #include "cc/output/filter_operation.h"
 #include "ui/gfx/animation/tween.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/rect_conversions.h"
 #include "ui/gfx/skia_util.h"
 
 namespace cc {
 
 bool FilterOperation::operator==(const FilterOperation& other) const {
   if (type_ != other.type_)
     return false;
   if (type_ == COLOR_MATRIX)
     return !memcmp(matrix_, other.matrix_, sizeof(matrix_));
   if (type_ == DROP_SHADOW) {
     return amount_ == other.amount_ &&
            drop_shadow_offset_ == other.drop_shadow_offset_ &&
            drop_shadow_color_ == other.drop_shadow_color_;
   }
-  if (type_ == REFERENCE)
+  if (type_ == REFERENCE) {
     return image_filter_.get() == other.image_filter_.get();
+  }
   if (type_ == ALPHA_THRESHOLD) {
     return region_ == other.region_ &&
         amount_ == other.amount_ &&
         outer_threshold_ == other.outer_threshold_;
   }
   return amount_ == other.amount_;
 }
 
+FilterOperation::FilterOperation() : FilterOperation(GRAYSCALE, 0.f) {}
+
 FilterOperation::FilterOperation(FilterType type, float amount)
     : type_(type),
       amount_(amount),
       outer_threshold_(0),
       drop_shadow_offset_(0, 0),
       drop_shadow_color_(0),
       zoom_inset_(0) {
   DCHECK_NE(type_, DROP_SHADOW);
   DCHECK_NE(type_, COLOR_MATRIX);
   DCHECK_NE(type_, REFERENCE);
@@ skipping 296 matching lines @@
       SkIRect out_rect = image_filter()->filterBounds(
           in_rect, matrix, SkImageFilter::kForward_MapDirection);
       return gfx::SkIRectToRect(out_rect);
     }
     default:
       return rect;
   }
 }
 
 }  // namespace cc