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// 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/drawing_display_item.h"
#include <string>
#include "base/strings/stringprintf.h"
#include "base/trace_event/trace_event_argument.h"
#include "base/values.h"
#include "cc/debug/picture_debug_util.h"
#include "cc/proto/display_item.pb.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkData.h"
#include "third_party/skia/include/core/SkMatrix.h"
#include "third_party/skia/include/core/SkPicture.h"
#include "third_party/skia/include/core/SkStream.h"
#include "third_party/skia/include/utils/SkPictureUtils.h"
#include "ui/gfx/skia_util.h"
namespace cc {
DrawingDisplayItem::DrawingDisplayItem() {
}
DrawingDisplayItem::~DrawingDisplayItem() {
}
void DrawingDisplayItem::SetNew(skia::RefPtr<SkPicture> picture) {
picture_ = picture.Pass();
DisplayItem::SetNew(picture_->suitableForGpuRasterization(NULL),
picture_->approximateOpCount(),
SkPictureUtils::ApproximateBytesUsed(picture_.get()));
}
void DrawingDisplayItem::ToProtobuf(proto::DisplayItem* proto) const {
proto->set_type(proto::DisplayItem::Type_Drawing);
proto::DrawingDisplayItem* details = proto->mutable_drawing_item();
// Just use skia's serialize() method for now.
if (picture_) {
SkDynamicMemoryWStream stream;
// TODO(dtrainor, nyquist): Add an SkPixelSerializer to not serialize images
// more than once (crbug.com/548434).
picture_->serialize(&stream, nullptr);
if (stream.bytesWritten() > 0) {
SkAutoDataUnref data(stream.copyToData());
details->set_picture(data->data(), data->size());
}
}
}
void DrawingDisplayItem::FromProtobuf(const proto::DisplayItem& proto) {
DCHECK_EQ(proto::DisplayItem::Type_Drawing, proto.type());
skia::RefPtr<SkPicture> picture;
const proto::DrawingDisplayItem& details = proto.drawing_item();
if (details.has_picture()) {
SkMemoryStream stream(details.picture().data(), details.picture().size());
// TODO(dtrainor, nyquist): Add an image decoder.
picture = skia::AdoptRef(SkPicture::CreateFromStream(&stream, nullptr));
}
SetNew(picture.Pass());
}
void DrawingDisplayItem::Raster(SkCanvas* canvas,
const gfx::Rect& canvas_target_playback_rect,
SkPicture::AbortCallback* callback) const {
// The canvas_playback_rect can be empty to signify no culling is desired.
if (!canvas_target_playback_rect.IsEmpty()) {
const SkMatrix& matrix = canvas->getTotalMatrix();
const SkRect& cull_rect = picture_->cullRect();
SkRect target_rect;
matrix.mapRect(&target_rect, cull_rect);
if (!target_rect.intersect(gfx::RectToSkRect(canvas_target_playback_rect)))
return;
}
// SkPicture always does a wrapping save/restore on the canvas, so it is not
// necessary here.
if (callback)
picture_->playback(canvas, callback);
else
canvas->drawPicture(picture_.get());
}
void DrawingDisplayItem::AsValueInto(
base::trace_event::TracedValue* array) const {
array->BeginDictionary();
array->SetString("name", "DrawingDisplayItem");
array->BeginArray("cullRect");
array->AppendInteger(picture_->cullRect().x());
array->AppendInteger(picture_->cullRect().y());
array->AppendInteger(picture_->cullRect().width());
array->AppendInteger(picture_->cullRect().height());
array->EndArray();
std::string b64_picture;
PictureDebugUtil::SerializeAsBase64(picture_.get(), &b64_picture);
array->SetString("skp64", b64_picture);
array->EndDictionary();
}
void DrawingDisplayItem::CloneTo(DrawingDisplayItem* item) const {
item->SetNew(picture_);
}
} // namespace cc
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