Add DPI helper #5030
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/*
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* synergy -- mouse and keyboard sharing utility
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* Copyright (C) 2015 Synergy Seamless Inc.
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*
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* This package is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* found in the file LICENSE that should have accompanied this file.
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*
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* This package 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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*
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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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#include "synergy/DpiHelper.h"
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#include "base/Log.h"
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#include <assert.h>
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size_t DpiHelper::s_dpi = kDefaultDpi;
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bool DpiHelper::s_dpiScaled = false;
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size_t DpiHelper::s_resolutionWidth = 0;
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size_t DpiHelper::s_resolutionHeight = 0;
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size_t DpiHelper::s_primaryWidthCenter = 0;
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size_t DpiHelper::s_primaryHeightCenter = 0;
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void DpiHelper::calculateDpi(size_t width, size_t height)
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{
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if (s_resolutionWidth == 0 || s_resolutionHeight == 0) {
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return;
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}
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size_t dpiTest1 = s_resolutionWidth * 100 / width;
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size_t dpiTest2 = s_resolutionHeight * 100 / height;
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assert(dpiTest1 == dpiTest2);
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s_dpi = dpiTest1;
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if (s_dpi != kDefaultDpi) {
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s_dpiScaled = true;
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LOG((CLOG_DEBUG "DPI: %d%%", s_dpi));
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LOG((CLOG_DEBUG "physical resolution: %d, %d scaled resolution: %d, %d", s_resolutionWidth, s_resolutionHeight, width, height));
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}
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}
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/*
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* synergy -- mouse and keyboard sharing utility
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* Copyright (C) 2015 Synergy Seamless Inc.
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*
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* This package is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* found in the file LICENSE that should have accompanied this file.
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*
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* This package 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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*
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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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class DpiHelper {
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public:
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enum EDpi {
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kDefaultDpi = 100
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};
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static void calculateDpi(size_t width, size_t height);
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static float getDpi() { return (float)(s_dpi / 100.0f); }
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public:
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static size_t s_dpi;
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static bool s_dpiScaled;
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static size_t s_resolutionWidth;
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static size_t s_resolutionHeight;
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static size_t s_primaryWidthCenter;
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static size_t s_primaryHeightCenter;
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};
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