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// Copyright 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 <algorithm>
#include "base/debug/trace_event.h"
#include "cc/picture_pile.h"
#include "third_party/skia/include/core/SkCanvas.h"
namespace cc {
PicturePile::PicturePile() {
}
PicturePile::~PicturePile() {
}
class OutOfBoundsPredicate {
public:
OutOfBoundsPredicate(gfx::Size size) : layer_rect_(gfx::Point(), size) { }
bool operator()(const scoped_refptr<Picture>& picture) {
return !picture->LayerRect().Intersects(layer_rect_);
}
gfx::Rect layer_rect_;
};
void PicturePile::Resize(gfx::Size size) {
// Remove pictures that aren't in bounds anymore.
if (size.width() < size_.width() || size.height() < size_.height()) {
OutOfBoundsPredicate oob(size);
pile_.erase(std::remove_if(pile_.begin(), pile_.end(), oob), pile_.end());
}
size_ = size;
}
void PicturePile::Update(
ContentLayerClient* painter,
const Region&,
RenderingStats& stats) {
// TODO(enne): Add things to the pile, consolidate if needed, etc...
// TODO(enne): Only re-record invalidated areas.
// TODO(enne): Also re-record areas that have been newly exposed by resize.
// Always re-record the entire layer into a single picture, just to get
// this class up and running.
if (pile_.size() == 0)
pile_.push_back(Picture::Create());
pile_[0]->Record(painter, gfx::Rect(gfx::Point(), size_), stats);
}
void PicturePile::PushPropertiesTo(PicturePile& other) {
other.pile_.resize(pile_.size());
for (size_t i = 0; i < pile_.size(); ++i)
other.pile_[i] = pile_[i];
}
scoped_ptr<PicturePile> PicturePile::CloneForDrawing() const {
TRACE_EVENT0("cc", "PicturePile::CloneForDrawing");
scoped_ptr<PicturePile> clone = make_scoped_ptr(new PicturePile);
clone->pile_.resize(pile_.size());
for (size_t i = 0; i < pile_.size(); ++i)
clone->pile_[i] = pile_[i]->Clone();
return clone.Pass();
}
void PicturePile::Raster(SkCanvas* canvas, gfx::Rect rect) {
// TODO(enne): do this more efficiently, i.e. top down with Skia clips
canvas->save();
canvas->translate(-rect.x(), -rect.y());
SkRect layer_skrect = SkRect::MakeXYWH(rect.x(), rect.y(),
rect.width(), rect.height());
canvas->clipRect(layer_skrect);
for (size_t i = 0; i < pile_.size(); ++i) {
if (!pile_[i]->LayerRect().Intersects(rect))
continue;
pile_[i]->Raster(canvas);
}
canvas->restore();
}
} // namespace cc
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