| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| #ifndef CLIPAREA_H |
| #define CLIPAREA_H |
| |
| #include <SkRegion.h> |
| |
| #include "Matrix.h" |
| #include "Rect.h" |
| #include "utils/Pair.h" |
| |
| namespace android { |
| namespace uirenderer { |
| |
| Rect transformAndCalculateBounds(const Rect& r, const Matrix4& transform); |
| |
| class TransformedRectangle { |
| public: |
| TransformedRectangle(); |
| TransformedRectangle(const Rect& bounds, const Matrix4& transform); |
| |
| bool canSimplyIntersectWith(const TransformedRectangle& other) const; |
| bool intersectWith(const TransformedRectangle& other); |
| |
| bool isEmpty() const; |
| |
| const Rect& getBounds() const { |
| return mBounds; |
| } |
| |
| Rect transformedBounds() const { |
| Rect transformedBounds(transformAndCalculateBounds(mBounds, mTransform)); |
| return transformedBounds; |
| } |
| |
| const Matrix4& getTransform() const { |
| return mTransform; |
| } |
| |
| private: |
| Rect mBounds; |
| Matrix4 mTransform; |
| }; |
| |
| class RectangleList { |
| public: |
| RectangleList(); |
| |
| bool isEmpty() const; |
| int getTransformedRectanglesCount() const; |
| const TransformedRectangle& getTransformedRectangle(int i) const; |
| |
| void setEmpty(); |
| void set(const Rect& bounds, const Matrix4& transform); |
| bool intersectWith(const Rect& bounds, const Matrix4& transform); |
| |
| SkRegion convertToRegion(const SkRegion& clip) const; |
| Rect calculateBounds() const; |
| |
| private: |
| enum { |
| kMaxTransformedRectangles = 5 |
| }; |
| |
| int mTransformedRectanglesCount; |
| TransformedRectangle mTransformedRectangles[kMaxTransformedRectangles]; |
| }; |
| |
| class ClipArea { |
| private: |
| enum class Mode { |
| Rectangle, |
| Region, |
| RectangleList |
| }; |
| |
| public: |
| ClipArea(); |
| |
| void setViewportDimensions(int width, int height); |
| |
| bool isEmpty() const { |
| return mClipRect.isEmpty(); |
| } |
| |
| void setEmpty(); |
| void setClip(float left, float top, float right, float bottom); |
| void clipRectWithTransform(float left, float top, float right, float bottom, |
| const mat4* transform, SkRegion::Op op); |
| void clipRectWithTransform(const Rect& r, const mat4* transform, |
| SkRegion::Op op); |
| void clipRegion(const SkRegion& region, SkRegion::Op op); |
| void clipPathWithTransform(const SkPath& path, const mat4* transform, |
| SkRegion::Op op); |
| |
| const Rect& getClipRect() const { |
| return mClipRect; |
| } |
| |
| const SkRegion& getClipRegion() const { |
| return mClipRegion; |
| } |
| |
| const RectangleList& getRectangleList() const { |
| return mRectangleList; |
| } |
| |
| bool isRegion() const { |
| return Mode::Region == mMode; |
| } |
| |
| bool isSimple() const { |
| return mMode == Mode::Rectangle; |
| } |
| |
| bool isRectangleList() const { |
| return mMode == Mode::RectangleList; |
| } |
| |
| private: |
| void enterRectangleMode(); |
| void rectangleModeClipRectWithTransform(const Rect& r, const mat4* transform, SkRegion::Op op); |
| void rectangleModeClipRectWithTransform(float left, float top, float right, |
| float bottom, const mat4* transform, SkRegion::Op op); |
| |
| void enterRectangleListMode(); |
| void rectangleListModeClipRectWithTransform(float left, float top, |
| float right, float bottom, const mat4* transform, SkRegion::Op op); |
| void rectangleListModeClipRectWithTransform(const Rect& r, |
| const mat4* transform, SkRegion::Op op); |
| |
| void enterRegionModeFromRectangleMode(); |
| void enterRegionModeFromRectangleListMode(); |
| void enterRegionMode(); |
| void regionModeClipRectWithTransform(const Rect& r, const mat4* transform, |
| SkRegion::Op op); |
| void regionModeClipRectWithTransform(float left, float top, float right, |
| float bottom, const mat4* transform, SkRegion::Op op); |
| |
| void ensureClipRegion(); |
| void onClipRegionUpdated(); |
| |
| SkRegion createViewportRegion() { |
| return SkRegion(mViewportBounds.toSkIRect()); |
| } |
| |
| void regionFromPath(const SkPath& path, SkRegion& pathAsRegion) { |
| // TODO: this should not mask every path to the viewport - this makes it impossible to use |
| // paths to clip to larger areas (which is valid e.g. with SkRegion::kReplace_Op) |
| pathAsRegion.setPath(path, createViewportRegion()); |
| } |
| |
| Mode mMode; |
| Rect mViewportBounds; |
| Rect mClipRect; |
| SkRegion mClipRegion; |
| RectangleList mRectangleList; |
| }; |
| |
| } /* namespace uirenderer */ |
| } /* namespace android */ |
| |
| #endif /* CLIPAREA_H_ */ |