#pragma once
// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.


#ifdef __cplusplus
extern "C" {
#endif

// from WinUser.h
#ifndef WM_DPICHANGED
#define WM_DPICHANGED       0x02E0
#endif
#ifndef USER_DEFAULT_SCREEN_DPI
#define USER_DEFAULT_SCREEN_DPI 96
#endif

typedef enum DPIU_AWARENESS
{
    DPIU_AWARENESS_NONE = 0x0,
    DPIU_AWARENESS_SYSTEM = 0x1,
    DPIU_AWARENESS_PERMONITOR = 0x2,
    DPIU_AWARENESS_PERMONITORV2 = 0x4,
    DPIU_AWARENESS_GDISCALED = 0x8,
} DPIU_PROCESS_AWARENESS;

typedef struct _DPIU_MONITOR_CONTEXT
{
    UINT nDpi;
    MONITORINFOEXW mi;
} DPIU_MONITOR_CONTEXT;

typedef struct _DPIU_WINDOW_CONTEXT
{
    UINT nDpi;
} DPIU_WINDOW_CONTEXT;

typedef BOOL (APIENTRY* PFN_ADJUSTWINDOWRECTEXFORDPI)(
    __in LPRECT lpRect,
    __in DWORD dwStyle,
    __in BOOL bMenu,
    __in DWORD dwExStyle,
    __in UINT dpi
    );
typedef UINT (APIENTRY *PFN_GETDPIFORWINDOW)(
    __in HWND hwnd
    );
typedef BOOL (APIENTRY* PFN_SETPROCESSDPIAWARE)();
typedef BOOL (APIENTRY* PFN_SETPROCESSDPIAWARENESSCONTEXT)(
    __in DPI_AWARENESS_CONTEXT value
    );

#ifdef DPI_ENUMS_DECLARED
typedef HRESULT(APIENTRY* PFN_GETDPIFORMONITOR)(
    __in HMONITOR hmonitor,
    __in MONITOR_DPI_TYPE dpiType,
    __in UINT* dpiX,
    __in UINT* dpiY
    );
typedef HRESULT(APIENTRY* PFN_SETPROCESSDPIAWARENESS)(
    __in PROCESS_DPI_AWARENESS value
    );
#endif

void DAPI DpiuInitialize();
void DAPI DpiuUninitialize();

/********************************************************************
 DpiuAdjustWindowRect - calculate the required size of the window rectangle,
                        based on the desired size of the client rectangle
                        and the provided DPI.

*******************************************************************/
void DAPI DpiuAdjustWindowRect(
    __in RECT* pWindowRect,
    __in DWORD dwStyle,
    __in BOOL fMenu,
    __in DWORD dwExStyle,
    __in UINT nDpi
    );

/********************************************************************
 DpiuGetMonitorContextFromPoint - get the DPI context of the monitor from the given point.

*******************************************************************/
HRESULT DAPI DpiuGetMonitorContextFromPoint(
    __in const POINT* pt,
    __out DPIU_MONITOR_CONTEXT** ppMonitorContext
    );

/********************************************************************
 DpiuGetWindowContext - get the DPI context of the given window.

*******************************************************************/
void DAPI DpiuGetWindowContext(
    __in HWND hWnd,
    __in DPIU_WINDOW_CONTEXT* pWindowContext
    );

/********************************************************************
 DpiuScaleValue - scale the value to the target DPI.

*******************************************************************/
int DAPI DpiuScaleValue(
    __in int nDefaultDpiValue,
    __in UINT nTargetDpi
    );

/********************************************************************
 DpiuSetProcessDpiAwareness - set the process DPI awareness. The ranking is
     PERMONITORV2 > PERMONITOR > SYSTEM > GDISCALED > NONE.

*******************************************************************/
HRESULT DAPI DpiuSetProcessDpiAwareness(
    __in DPIU_AWARENESS supportedAwareness,
    __in_opt DPIU_AWARENESS* pSelectedAwareness
    );

#ifdef __cplusplus
}
#endif