49 lines
987 B
C++
49 lines
987 B
C++
// This file is part of Desktop App Toolkit,
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// a set of libraries for developing nice desktop applications.
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//
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// For license and copyright information please follow this link:
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// https://github.com/desktop-app/legal/blob/master/LEGAL
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//
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#include "ui/style/style_core_scale.h"
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#include "base/assertion.h"
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namespace style {
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namespace {
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int DevicePixelRatioValue = 1;
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int ScaleValue = kScaleDefault;
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} // namespace
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int DevicePixelRatio() {
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return DevicePixelRatioValue;
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}
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void SetDevicePixelRatio(int ratio) {
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DevicePixelRatioValue = std::clamp(ratio, 1, kScaleMax / kScaleMin);
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}
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int Scale() {
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return ScaleValue;
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}
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void SetScale(int scale) {
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Expects(scale != 0);
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ScaleValue = scale;
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}
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int MaxScaleForRatio(int ratio) {
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Expects(ratio > 0);
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return std::max(kScaleMax / ratio, kScaleAlwaysAllowMax);
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}
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int CheckScale(int scale) {
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return (scale == kScaleAuto)
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? kScaleAuto
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: std::clamp(scale, kScaleMin, MaxScaleForRatio(DevicePixelRatio()));
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}
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} // namespace style
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