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DPIAware: implement GetAwarenessLevel and cleanup

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yuyoyuppe 2019-12-16 14:28:14 +03:00 committed by yuyoyuppe
parent 303d1fef6b
commit 2e922019d7
2 changed files with 41 additions and 10 deletions
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28
src/common/dpi_aware.cpp
View File

@ -3,7 +3,9 @@
#include "monitors.h"
#include <ShellScalingApi.h>
HRESULT DPIAware::GetScreenDPIForWindow(HWND hwnd, UINT &dpi_x, UINT &dpi_y) {
namespace DPIAware
{
HRESULT GetScreenDPIForWindow(HWND hwnd, UINT &dpi_x, UINT &dpi_y) {
auto monitor_handle = MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST);
dpi_x = 0;
dpi_y = 0;
@ -14,7 +16,7 @@ HRESULT DPIAware::GetScreenDPIForWindow(HWND hwnd, UINT &dpi_x, UINT &dpi_y) {
}
}
HRESULT DPIAware::GetScreenDPIForPoint(POINT p, UINT& dpi_x, UINT& dpi_y) {
HRESULT GetScreenDPIForPoint(POINT p, UINT& dpi_x, UINT& dpi_y) {
auto monitor_handle = MonitorFromPoint(p, MONITOR_DEFAULTTONEAREST);
dpi_x = 0;
dpi_y = 0;
@ -26,7 +28,7 @@ HRESULT DPIAware::GetScreenDPIForPoint(POINT p, UINT& dpi_x, UINT& dpi_y) {
}
}
void DPIAware::Convert(HMONITOR monitor_handle, int &width, int &height) {
void Convert(HMONITOR monitor_handle, int &width, int &height) {
if (monitor_handle == NULL) {
const POINT ptZero = { 0, 0 };
monitor_handle = MonitorFromPoint(ptZero, MONITOR_DEFAULTTOPRIMARY);
@ -39,6 +41,24 @@ void DPIAware::Convert(HMONITOR monitor_handle, int &width, int &height) {
}
}
void DPIAware::EnableDPIAwarenessForThisProcess() {
void EnableDPIAwarenessForThisProcess() {
SetProcessDpiAwarenessContext(DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2);
}
AWARENESS_LEVEL GetAwarenessLevel(DPI_AWARENESS_CONTEXT system_returned_value)
{
const std::array levels{ DPI_AWARENESS_CONTEXT_UNAWARE,
DPI_AWARENESS_CONTEXT_SYSTEM_AWARE,
DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE,
DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2,
DPI_AWARENESS_CONTEXT_UNAWARE_GDISCALED };
for(size_t i = 0; i < size(levels); ++i)
{
if(AreDpiAwarenessContextsEqual(levels[i], system_returned_value))
{
return static_cast<AWARENESS_LEVEL>(i);
}
}
return AWARENESS_LEVEL::UNAWARE;
}
}

23
src/common/dpi_aware.h
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@ -1,11 +1,22 @@
#pragma once
#include "windef.h"
struct DPIAware {
static constexpr int DEFAULT_DPI = 96;
namespace DPIAware {
constexpr inline int DEFAULT_DPI = 96;
static HRESULT GetScreenDPIForWindow(HWND hwnd, UINT & dpi_x, UINT & dpi_y);
static HRESULT GetScreenDPIForPoint(POINT p, UINT& dpi_x, UINT& dpi_y);
static void Convert(HMONITOR monitor_handle, int &width, int &height);
static void EnableDPIAwarenessForThisProcess();
HRESULT GetScreenDPIForWindow(HWND hwnd, UINT & dpi_x, UINT & dpi_y);
HRESULT GetScreenDPIForPoint(POINT p, UINT& dpi_x, UINT& dpi_y);
void Convert(HMONITOR monitor_handle, int &width, int &height);
void EnableDPIAwarenessForThisProcess();
enum class AWARENESS_LEVEL
{
UNAWARE,
SYSTEM_AWARE,
PER_MONITOR_AWARE,
PER_MONITOR_AWARE_V2,
UNAWARE_GDISCALED
};
AWARENESS_LEVEL GetAwarenessLevel(DPI_AWARENESS_CONTEXT system_returned_value);
};