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28 lines
839 B
C++
28 lines
839 B
C++
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#include "pch.h"
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#include "dpi_aware.h"
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#include "monitors.h"
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#include <ShellScalingApi.h>
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HRESULT DPIAware::GetScreenDPIForWindow(HWND hwnd, UINT &dpi_x, UINT &dpi_y) {
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auto monitor_handle = MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST);
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dpi_x = 0;
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dpi_y = 0;
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if (monitor_handle != nullptr) {
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return GetDpiForMonitor(monitor_handle, MDT_EFFECTIVE_DPI, &dpi_x, &dpi_y);
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} else {
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return E_FAIL;
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}
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}
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void DPIAware::Convert(HMONITOR monitor_handle, int &width, int &height) {
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if (monitor_handle == NULL) {
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const POINT ptZero = { 0, 0 };
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monitor_handle = MonitorFromPoint(ptZero, MONITOR_DEFAULTTOPRIMARY);
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}
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UINT dpi_x, dpi_y;
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if (GetDpiForMonitor(monitor_handle, MDT_EFFECTIVE_DPI, &dpi_x, &dpi_y) == S_OK) {
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width = width * dpi_x / DEFAULT_DPI;
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height = height * dpi_y / DEFAULT_DPI;
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}
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}
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