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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.
- #ifndef CC_LAYERS_NINE_PATCH_LAYER_H_
- #define CC_LAYERS_NINE_PATCH_LAYER_H_
- #include <memory>
- #include "cc/cc_export.h"
- #include "cc/layers/layer.h"
- #include "cc/layers/ui_resource_layer.h"
- #include "cc/resources/ui_resource_client.h"
- #include "ui/gfx/geometry/rect.h"
- namespace cc {
- class CC_EXPORT NinePatchLayer : public UIResourceLayer {
- public:
- static scoped_refptr<NinePatchLayer> Create();
- NinePatchLayer(const NinePatchLayer&) = delete;
- NinePatchLayer& operator=(const NinePatchLayer&) = delete;
- void PushPropertiesTo(LayerImpl* layer,
- const CommitState& commit_state,
- const ThreadUnsafeCommitState& unsafe_state) override;
- // |border| is the space around the center rectangular region in layer space
- // (known as aperture in image space). |border.x()| and |border.y()| are the
- // size of the left and top boundary, respectively.
- // |border.width()-border.x()| and |border.height()-border.y()| are the size
- // of the right and bottom boundary, respectively.
- void SetBorder(const gfx::Rect& border);
- // aperture is in the pixel space of the bitmap resource and refers to
- // the center patch of the ninepatch (which is unused in this
- // implementation). We split off eight rects surrounding it and stick them
- // on the edges of the layer. The corners are unscaled, the top and bottom
- // rects are x-stretched to fit, and the left and right rects are
- // y-stretched to fit.
- void SetAperture(const gfx::Rect& aperture);
- void SetFillCenter(bool fill_center);
- void SetNearestNeighbor(bool nearest_neighbor);
- // |rect| is the space completely occluded by another layer in layer
- // space. This can be used for example to occlude the entire window's
- // content when drawing the shadow with a 9 patches layer.
- void SetLayerOcclusion(const gfx::Rect& occlusion);
- private:
- NinePatchLayer();
- ~NinePatchLayer() override;
- std::unique_ptr<LayerImpl> CreateLayerImpl(
- LayerTreeImpl* tree_impl) const override;
- ProtectedSequenceReadable<gfx::Rect> border_;
- ProtectedSequenceReadable<bool> fill_center_;
- ProtectedSequenceReadable<bool> nearest_neighbor_;
- // The transparent center region that shows the parent layer's contents in
- // image space.
- ProtectedSequenceReadable<gfx::Rect> image_aperture_;
- // The occluded region in layer space set by SetLayerOcclusion. It is
- // usually larger than |image_aperture_|.
- ProtectedSequenceReadable<gfx::Rect> layer_occlusion_;
- };
- } // namespace cc
- #endif // CC_LAYERS_NINE_PATCH_LAYER_H_
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