cc: Shrink size of display item

cc/playback/filter_display_item.cc

 // Copyright 2014 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 "cc/playback/filter_display_item.h"
 
 #include "base/strings/stringprintf.h"
 #include "base/trace_event/trace_event_argument.h"
 #include "cc/output/render_surface_filters.h"
 #include "cc/proto/display_item.pb.h"
 #include "cc/proto/gfx_conversions.h"
 #include "skia/ext/refptr.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkImageFilter.h"
 #include "third_party/skia/include/core/SkPaint.h"
 #include "third_party/skia/include/core/SkXfermode.h"
 #include "ui/gfx/skia_util.h"
 
 namespace cc {
 
-FilterDisplayItem::FilterDisplayItem() {
+FilterDisplayItem::FilterDisplayItem(const FilterOperations& filters,
+                                     const gfx::RectF& bounds) {
+  SetNew(filters, bounds);
 }
 
-FilterDisplayItem::~FilterDisplayItem() {
+FilterDisplayItem::FilterDisplayItem(const proto::DisplayItem& proto) {
+  DCHECK_EQ(proto::DisplayItem::Type_Filter, proto.type());
+
+  const proto::FilterDisplayItem& details = proto.filter_item();
+  gfx::RectF bounds = ProtoToRectF(details.bounds());
+
+  // TODO(dtrainor): Support deserializing FilterOperations (crbug.com/541321).
+  FilterOperations filters;
+
+  SetNew(filters, bounds);
 }
 
+FilterDisplayItem::~FilterDisplayItem() {}
+
 void FilterDisplayItem::SetNew(const FilterOperations& filters,
                                const gfx::RectF& bounds) {
   filters_ = filters;
   bounds_ = bounds;
-
-  // FilterOperations doesn't expose its capacity, but size is probably good
-  // enough.
-  size_t external_memory_usage = filters_.size() * sizeof(filters_.at(0));
-  DisplayItem::SetNew(true /* suitable_for_gpu_raster */, 1 /* op_count */,
-                      external_memory_usage);
 }
 
 void FilterDisplayItem::ToProtobuf(proto::DisplayItem* proto) const {
   proto->set_type(proto::DisplayItem::Type_Filter);
 
   proto::FilterDisplayItem* details = proto->mutable_filter_item();
   RectFToProto(bounds_, details->mutable_bounds());
 
   // TODO(dtrainor): Support serializing FilterOperations (crbug.com/541321).
 }
 
-void FilterDisplayItem::FromProtobuf(const proto::DisplayItem& proto) {
-  DCHECK_EQ(proto::DisplayItem::Type_Filter, proto.type());
-
-  const proto::FilterDisplayItem& details = proto.filter_item();
-  gfx::RectF bounds = ProtoToRectF(details.bounds());
-
-  // TODO(dtrainor): Support deserializing FilterOperations (crbug.com/541321).
-  FilterOperations filters;
-
-  SetNew(filters, bounds);
-}
-
 void FilterDisplayItem::Raster(SkCanvas* canvas,
                                const gfx::Rect& canvas_target_playback_rect,
                                SkPicture::AbortCallback* callback) const {
   canvas->save();
   canvas->translate(bounds_.x(), bounds_.y());
 
   skia::RefPtr<SkImageFilter> image_filter =
       RenderSurfaceFilters::BuildImageFilter(
           filters_, gfx::SizeF(bounds_.width(), bounds_.height()));
   SkRect boundaries = SkRect::MakeWH(bounds_.width(), bounds_.height());
 
   SkPaint paint;
   paint.setXfermodeMode(SkXfermode::kSrcOver_Mode);
   paint.setImageFilter(image_filter.get());
   canvas->saveLayer(&boundaries, &paint);
 
   canvas->translate(-bounds_.x(), -bounds_.y());
 }
 
 void FilterDisplayItem::AsValueInto(
     const gfx::Rect& visual_rect,
     base::trace_event::TracedValue* array) const {
   array->AppendString(base::StringPrintf(
       "FilterDisplayItem bounds: [%s] visualRect: [%s]",
       bounds_.ToString().c_str(), visual_rect.ToString().c_str()));
 }
 
-EndFilterDisplayItem::EndFilterDisplayItem() {
-  DisplayItem::SetNew(true /* suitable_for_gpu_raster */, 0 /* op_count */,
-                      0 /* external_memory_usage */);
+size_t FilterDisplayItem::ExternalMemoryUsage() const {
+  // FilterOperations doesn't expose its capacity, but size is probably good
+  // enough.
+  return filters_.size() * sizeof(filters_.at(0));
 }
 
-EndFilterDisplayItem::~EndFilterDisplayItem() {
+EndFilterDisplayItem::EndFilterDisplayItem() {}
+
+EndFilterDisplayItem::EndFilterDisplayItem(const proto::DisplayItem& proto) {
+  DCHECK_EQ(proto::DisplayItem::Type_EndFilter, proto.type());
 }
 
+EndFilterDisplayItem::~EndFilterDisplayItem() {}
+
 void EndFilterDisplayItem::ToProtobuf(proto::DisplayItem* proto) const {
   proto->set_type(proto::DisplayItem::Type_EndFilter);
 }
 
-void EndFilterDisplayItem::FromProtobuf(const proto::DisplayItem& proto) {
-  DCHECK_EQ(proto::DisplayItem::Type_EndFilter, proto.type());
-}
-
 void EndFilterDisplayItem::Raster(SkCanvas* canvas,
                                   const gfx::Rect& canvas_target_playback_rect,
                                   SkPicture::AbortCallback* callback) const {
   canvas->restore();
   canvas->restore();
 }
 
 void EndFilterDisplayItem::AsValueInto(
     const gfx::Rect& visual_rect,
     base::trace_event::TracedValue* array) const {
   array->AppendString(
       base::StringPrintf("EndFilterDisplayItem  visualRect: [%s]",
                          visual_rect.ToString().c_str()));
 }
 
+size_t EndFilterDisplayItem::ExternalMemoryUsage() const {
+  return 0;
+}
+
 }  // namespace cc