64 lines
2.0 KiB
C++
64 lines
2.0 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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#if QT_VERSION >= QT_VERSION_CHECK(5, 6, 0)
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#define SUPPORTS_FRACTIONAL_SCALING
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#endif
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static inline void GetScaleAndCenterPos(
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int baseCX, int baseCY, int windowCX, int windowCY,
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int &x, int &y, 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(
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int baseCX, int baseCY, 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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#ifdef SUPPORTS_FRACTIONAL_SCALING
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return widget->size() * widget->devicePixelRatioF();
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#else
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return widget->size() * widget->devicePixelRatio();
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#endif
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}
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