| // 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 "third_party/skia/include/core/SkCanvas.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()).PassAs<LayerImpl>(); |
| } |
| |
| bool PictureImageLayer::DrawsContent() const { |
| return !bitmap_.isNull() && PictureLayer::DrawsContent(); |
| } |
| |
| 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; |
| SetNeedsDisplay(); |
| } |
| |
| void PictureImageLayer::PaintContents(SkCanvas* canvas, |
| const gfx::Rect& clip, |
| gfx::RectF* opaque) { |
| 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 PictureImageLayer always FillsBoundsCompletely it will not clear |
| // before painting on playback. As a result we must configure the paint to |
| // copy over the uncleared destination, rather than blending with it. |
| SkPaint paint; |
| paint.setXfermodeMode(SkXfermode::kSrc_Mode); |
| canvas->drawBitmap(bitmap_, 0, 0, &paint); |
| } |
| |
| bool PictureImageLayer::FillsBoundsCompletely() const { |
| // PictureImageLayer will always paint to the entire layer bounds. |
| return true; |
| } |
| |
| } // namespace cc |