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68 lines
1.9 KiB
68 lines
1.9 KiB
/* |
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* Copyright (c) 2020 Samsung Electronics Co., Ltd. All rights reserved. |
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* Permission is hereby granted, free of charge, to any person obtaining a copy |
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* of this software and associated documentation files (the "Software"), to deal |
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* in the Software without restriction, including without limitation the rights |
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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* copies of the Software, and to permit persons to whom the Software is |
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* furnished to do so, subject to the following conditions: |
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* The above copyright notice and this permission notice shall be included in all |
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* copies or substantial portions of the Software. |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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*/ |
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#include "vrect.h" |
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#include <algorithm> |
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VRect VRect::operator&(const VRect &r) const |
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{ |
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if (empty()) return VRect(); |
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int l1 = x1; |
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int r1 = x1; |
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if (x2 - x1 + 1 < 0) |
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l1 = x2; |
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else |
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r1 = x2; |
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int l2 = r.x1; |
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int r2 = r.x1; |
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if (r.x2 - r.x1 + 1 < 0) |
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l2 = r.x2; |
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else |
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r2 = r.x2; |
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if (l1 > r2 || l2 > r1) return VRect(); |
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int t1 = y1; |
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int b1 = y1; |
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if (y2 - y1 + 1 < 0) |
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t1 = y2; |
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else |
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b1 = y2; |
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int t2 = r.y1; |
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int b2 = r.y1; |
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if (r.y2 - r.y1 + 1 < 0) |
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t2 = r.y2; |
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else |
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b2 = r.y2; |
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if (t1 > b2 || t2 > b1) return VRect(); |
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VRect tmp; |
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tmp.x1 = std::max(l1, l2); |
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tmp.x2 = std::min(r1, r2); |
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tmp.y1 = std::max(t1, t2); |
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tmp.y2 = std::min(b1, b2); |
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return tmp; |
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}
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