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/*
* Copyright (C) 2024 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.
*/
#pragma once
/**
* Stores the edge that will be extended
*/
namespace android {
enum CanonicalDirections { NONE = 0, LEFT = 1, RIGHT = 2, TOP = 4, BOTTOM = 8 };
inline std::string to_string(CanonicalDirections direction) {
switch (direction) {
case LEFT:
return "LEFT";
case RIGHT:
return "RIGHT";
case TOP:
return "TOP";
case BOTTOM:
return "BOTTOM";
case NONE:
return "NONE";
}
}
struct EdgeExtensionEffect {
EdgeExtensionEffect(bool left, bool right, bool top, bool bottom) {
extensionEdges = NONE;
if (left) {
extensionEdges |= LEFT;
}
if (right) {
extensionEdges |= RIGHT;
}
if (top) {
extensionEdges |= TOP;
}
if (bottom) {
extensionEdges |= BOTTOM;
}
}
EdgeExtensionEffect() { EdgeExtensionEffect(false, false, false, false); }
bool extendsEdge(CanonicalDirections edge) const { return extensionEdges & edge; }
bool hasEffect() const { return extensionEdges != NONE; };
void reset() { extensionEdges = NONE; }
bool operator==(const EdgeExtensionEffect& other) const {
return extensionEdges == other.extensionEdges;
}
bool operator!=(const EdgeExtensionEffect& other) const { return !(*this == other); }
private:
int extensionEdges;
};
inline std::string to_string(const EdgeExtensionEffect& effect) {
std::string s = "EdgeExtensionEffect={edges=[";
if (effect.hasEffect()) {
for (CanonicalDirections edge : {LEFT, RIGHT, TOP, BOTTOM}) {
if (effect.extendsEdge(edge)) {
s += to_string(edge) + ", ";
}
}
} else {
s += to_string(NONE);
}
s += "]}";
return s;
}
inline std::ostream& operator<<(std::ostream& os, const EdgeExtensionEffect effect) {
os << to_string(effect);
return os;
}
} // namespace android