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/*
* Copyright (C) 2014 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 OUTLINE_H
#define OUTLINE_H
#include <SkPath.h>
#include "Rect.h"
#include "utils/MathUtils.h"
namespace android {
namespace uirenderer {
class Outline {
public:
enum class Type { None = 0, Empty = 1, ConvexPath = 2, RoundRect = 3 };
Outline() : mShouldClip(false), mType(Type::None), mRadius(0), mAlpha(0.0f) {}
void setRoundRect(int left, int top, int right, int bottom, float radius, float alpha) {
mAlpha = alpha;
if (mType == Type::RoundRect && left == mBounds.left && right == mBounds.right &&
top == mBounds.top && bottom == mBounds.bottom && radius == mRadius) {
// nothing to change, don't do any work
return;
}
mType = Type::RoundRect;
mBounds.set(left, top, right, bottom);
mRadius = radius;
// Reuse memory if previous outline was the same shape (rect or round rect).
if (mPath.countVerbs() > 10) {
mPath.reset();
} else {
mPath.rewind();
}
// update mPath to reflect new outline
if (MathUtils::isPositive(radius)) {
mPath.addRoundRect(SkRect::MakeLTRB(left, top, right, bottom), radius, radius);
} else {
mPath.addRect(left, top, right, bottom);
}
}
void setConvexPath(const SkPath* outline, float alpha) {
if (!outline) {
setEmpty();
return;
}
mType = Type::ConvexPath;
mPath = *outline;
mBounds.set(outline->getBounds());
mAlpha = alpha;
}
void setEmpty() {
mType = Type::Empty;
mPath.reset();
mAlpha = 0.0f;
}
void setNone() {
mType = Type::None;
mPath.reset();
mAlpha = 0.0f;
}
bool isEmpty() const { return mType == Type::Empty; }
float getAlpha() const { return mAlpha; }
void setShouldClip(bool clip) { mShouldClip = clip; }
bool getShouldClip() const { return mShouldClip; }
bool willClip() const {
// only round rect outlines can be used for clipping
return mShouldClip && (mType == Type::RoundRect);
}
bool willRoundRectClip() const {
// only round rect outlines can be used for clipping
return willClip() && MathUtils::isPositive(mRadius);
}
bool getAsRoundRect(Rect* outRect, float* outRadius) const {
if (mType == Type::RoundRect) {
outRect->set(mBounds);
*outRadius = mRadius;
return true;
}
return false;
}
const SkPath* getPath() const {
if (mType == Type::None || mType == Type::Empty) return nullptr;
return &mPath;
}
Type getType() const { return mType; }
const Rect& getBounds() const { return mBounds; }
float getRadius() const { return mRadius; }
private:
bool mShouldClip;
Type mType;
Rect mBounds;
float mRadius;
float mAlpha;
SkPath mPath;
};
} /* namespace uirenderer */
} /* namespace android */
#endif /* OUTLINE_H */
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