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1fa45e63a3
Among the systems we officially support, the oldest Qt version is Qt 5.9 on Ubuntu 18.04. Fractional scaling is supported in Qt 5.6 and newer. We should be able to safely remove these ifdefs.
56 lines
1.8 KiB
C++
56 lines
1.8 KiB
C++
/******************************************************************************
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Copyright (C) 2014 by Hugh Bailey <obs.jim@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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******************************************************************************/
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#pragma once
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static inline void GetScaleAndCenterPos(int baseCX, int baseCY, int windowCX,
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int windowCY, int &x, int &y,
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float &scale)
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{
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double windowAspect, baseAspect;
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int newCX, newCY;
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windowAspect = double(windowCX) / double(windowCY);
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baseAspect = double(baseCX) / double(baseCY);
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if (windowAspect > baseAspect) {
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scale = float(windowCY) / float(baseCY);
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newCX = int(double(windowCY) * baseAspect);
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newCY = windowCY;
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} else {
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scale = float(windowCX) / float(baseCX);
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newCX = windowCX;
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newCY = int(float(windowCX) / baseAspect);
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}
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x = windowCX / 2 - newCX / 2;
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y = windowCY / 2 - newCY / 2;
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}
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static inline void GetCenterPosFromFixedScale(int baseCX, int baseCY,
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int windowCX, int windowCY,
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int &x, int &y, float scale)
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{
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x = (float(windowCX) - float(baseCX) * scale) / 2.0f;
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y = (float(windowCY) - float(baseCY) * scale) / 2.0f;
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}
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static inline QSize GetPixelSize(QWidget *widget)
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{
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return widget->size() * widget->devicePixelRatioF();
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}
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