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// Copyright 2010 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/layers/picture_image_layer.h"
#include "cc/layers/picture_image_layer_impl.h"
#include "cc/resources/drawing_display_item.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkPictureRecorder.h"
#include "ui/gfx/skia_util.h"
namespace cc {
scoped_refptr<PictureImageLayer> PictureImageLayer::Create() {
return make_scoped_refptr(new PictureImageLayer());
}
PictureImageLayer::PictureImageLayer() : PictureLayer(this) {}
PictureImageLayer::~PictureImageLayer() {
ClearClient();
}
scoped_ptr<LayerImpl> PictureImageLayer::CreateLayerImpl(
LayerTreeImpl* tree_impl) {
return PictureImageLayerImpl::Create(tree_impl, id(), is_mask());
}
bool PictureImageLayer::HasDrawableContent() const {
return !bitmap_.isNull() && PictureLayer::HasDrawableContent();
}
void PictureImageLayer::SetBitmap(const SkBitmap& bitmap) {
// SetBitmap() currently gets called whenever there is any
// style change that affects the layer even if that change doesn't
// affect the actual contents of the image (e.g. a CSS animation).
// With this check in place we avoid unecessary texture uploads.
if (bitmap.pixelRef() && bitmap.pixelRef() == bitmap_.pixelRef())
return;
bitmap_ = bitmap;
UpdateDrawsContent(HasDrawableContent());
SetNeedsDisplay();
}
void PictureImageLayer::PaintContents(
SkCanvas* canvas,
const gfx::Rect& clip,
ContentLayerClient::PaintingControlSetting painting_control) {
if (!bitmap_.width() || !bitmap_.height())
return;
SkScalar content_to_layer_scale_x =
SkFloatToScalar(static_cast<float>(bounds().width()) / bitmap_.width());
SkScalar content_to_layer_scale_y =
SkFloatToScalar(static_cast<float>(bounds().height()) / bitmap_.height());
canvas->scale(content_to_layer_scale_x, content_to_layer_scale_y);
// Because Android WebView resourceless software draw mode rasters directly
// to the root canvas, this draw must use the kSrcOver_Mode so that
// transparent images blend correctly.
canvas->drawBitmap(bitmap_, 0, 0);
}
void PictureImageLayer::PaintContentsToDisplayList(
DisplayItemList* display_list,
const gfx::Rect& clip,
ContentLayerClient::PaintingControlSetting painting_control) {
SkPictureRecorder recorder;
SkCanvas* canvas = recorder.beginRecording(gfx::RectToSkRect(clip));
PaintContents(canvas, clip, painting_control);
skia::RefPtr<SkPicture> picture =
skia::AdoptRef(recorder.endRecordingAsPicture());
display_list->AppendItem(DrawingDisplayItem::Create(picture));
}
bool PictureImageLayer::FillsBoundsCompletely() const {
return false;
}
} // namespace cc
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