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#pragma once

#include <windows.h>
#include <rpc.h>
#include <uxtheme.h>

#ifndef WM_DPICHANGED
#define WM_DPICHANGED       0x02E0
#endif

#ifdef __cplusplus
extern "C" IMAGE_DOS_HEADER __ImageBase;
#else
extern IMAGE_DOS_HEADER __ImageBase;
#endif
#define ALF_HINSTANCE ((HINSTANCE)&__ImageBase)

static inline BOOL ALF_Compat_IsMinWindowsVersion(DWORD major, DWORD minor)
{
    DWORD v = GetVersion();
    DWORD vMajor = LOBYTE(LOWORD(v));
    DWORD vMinor = HIBYTE(LOWORD(v));

    return vMajor > major || (vMajor == major && vMinor >= minor);
}

typedef LRESULT (CALLBACK *ALF_COMPAT_SUBCLASSPROC)(HWND,UINT,WPARAM,LPARAM,UINT_PTR,DWORD_PTR);

typedef struct {
    UINT     cbSize;
    int      iBorderWidth;
    int      iScrollWidth;
    int      iScrollHeight;
    int      iCaptionWidth;
    int      iCaptionHeight;
    LOGFONTW lfCaptionFont;
    int      iSmCaptionWidth;
    int      iSmCaptionHeight;
    LOGFONTW lfSmCaptionFont;
    int      iMenuWidth;
    int      iMenuHeight;
    LOGFONTW lfMenuFont;
    LOGFONTW lfStatusFont;
    LOGFONTW lfMessageFont;
    int      iPaddedBorderWidth; // new in Vista
} ALF_NONCLIENTMETRICSW_VISTA;
typedef struct {
    UINT     cbSize;
    int      iBorderWidth;
    int      iScrollWidth;
    int      iScrollHeight;
    int      iCaptionWidth;
    int      iCaptionHeight;
    LOGFONTA lfCaptionFont;
    int      iSmCaptionWidth;
    int      iSmCaptionHeight;
    LOGFONTA lfSmCaptionFont;
    int      iMenuWidth;
    int      iMenuHeight;
    LOGFONTA lfMenuFont;
    LOGFONTA lfStatusFont;
    LOGFONTA lfMessageFont;
    int      iPaddedBorderWidth; // new in Vista
} ALF_NONCLIENTMETRICSA_VISTA;

long
ALF_GetAveCharWidth(HDC hdc);

typedef void *ALF_Compat_HANIMATIONBUFFER;

typedef enum {
  ALF_Compat_BPAS_NONE,
  ALF_Compat_BPAS_LINEAR,
  ALF_Compat_BPAS_CUBIC,
  ALF_Compat_BPAS_SINE
} ALF_Compat_BP_ANIMATIONSTYLE;

typedef struct {
  DWORD                         cbSize;
  DWORD                         dwFlags;
  ALF_Compat_BP_ANIMATIONSTYLE  style;
  DWORD                         dwDuration;
} ALF_Compat_BP_ANIMATIONPARAMS;

typedef struct {
  DWORD               cbSize;
  DWORD               dwFlags;
  const RECT          *prcExclude;
  const BLENDFUNCTION *pBlendFunction;
} ALF_Compat_BP_PAINTPARAMS;

#ifndef TMT_TRANSITIONDURATION
#define TMT_TRANSITIONDURATION 6000
#endif

void ALF_LoadCompatFunctions(void);
void ALF_UnloadCompatFunctions(void);

inline static void
ALF_Compat_LogFontWtoA(const LOGFONTW *w, LOGFONTA *a)
{
    CopyMemory(a, w, sizeof(LOGFONTA) - LF_FACESIZE);
    WideCharToMultiByte(CP_ACP, 0, w->lfFaceName, -1, a->lfFaceName, LF_FACESIZE, NULL, NULL);
    a->lfFaceName[LF_FACESIZE - 1] = '\0';
}

inline static void
ALF_Compat_LogFontAtoW(const LOGFONTA *a, LOGFONTW *w)
{
    CopyMemory(w, a, sizeof(LOGFONTA) - LF_FACESIZE);
    MultiByteToWideChar(CP_ACP, 0, a->lfFaceName, -1, w->lfFaceName, LF_FACESIZE);
    w->lfFaceName[LF_FACESIZE - 1] = 0;
}

extern BOOL (WINAPI *ALF_Compat_IsAppThemed)(void);
extern UINT (WINAPI *ALF_Compat_GetDpiForWindow)(HWND);
extern BOOL (WINAPI *ALF_Compat_AdjustWindowRectExForDpi)(LPRECT,DWORD,BOOL,DWORD,UINT);
extern int (WINAPI *ALF_Compat_GetSystemMetricsForDpi)(int,  UINT);
extern BOOL (WINAPI *ALF_Compat_SetWindowSubclass)(HWND, ALF_COMPAT_SUBCLASSPROC, UINT_PTR, DWORD_PTR);
extern LRESULT (WINAPI *ALF_Compat_DefSubclassProc)(HWND, UINT, WPARAM, LPARAM);
extern BOOL (WINAPI *ALF_Compat_RemoveWindowSubclass)(HWND, ALF_COMPAT_SUBCLASSPROC, UINT_PTR);
extern BOOL (WINAPI *ALF_Compat_SystemParametersInfoForDpi)(UINT,UINT,PVOID,UINT,UINT);
extern HTHEME (WINAPI *ALF_Compat_OpenThemeData)(HWND, LPCWSTR);
extern HRESULT (WINAPI *ALF_Compat_CloseThemeData)(HTHEME);
extern BOOL (WINAPI *ALF_Compat_IsThemeBackgroundPartiallyTransparent)(HTHEME,int,int);
extern HRESULT (WINAPI *ALF_Compat_DrawThemeParentBackground)(HWND,HDC,RECT *);
extern HRESULT (WINAPI *ALF_Compat_DrawThemeBackground)(HTHEME, HDC, int, int, const RECT *, const RECT *);
extern HRESULT (WINAPI *ALF_Compat_GetThemeBackgroundContentRect)(HTHEME,HDC,int,int,const RECT *,RECT *);
extern HRESULT (WINAPI *ALF_Compat_GetThemeTextExtent)(HTHEME,HDC,int,int,LPCWSTR,int,DWORD,const RECT *, RECT *);
extern HRESULT (WINAPI *ALF_Compat_DrawThemeText)(HTHEME,HDC,int,int,LPCWSTR,int,DWORD,DWORD,const RECT *);
extern BOOL (WINAPI *ALF_Compat_TrackMouseEvent)(LPTRACKMOUSEEVENT tme);
extern HRESULT (WINAPI *ALF_Compat_BufferedPaintInit)(void);
extern HRESULT (WINAPI *ALF_Compat_BufferedPaintUnInit)(void);
extern ALF_Compat_HANIMATIONBUFFER (WINAPI *ALF_Compat_BeginBufferedAnimation)(HWND,HDC,const RECT *,DWORD,ALF_Compat_BP_PAINTPARAMS *,ALF_Compat_BP_ANIMATIONPARAMS *,HDC *,HDC *);
extern HRESULT (WINAPI *ALF_Compat_EndBufferedAnimation)(ALF_Compat_HANIMATIONBUFFER,BOOL);
extern BOOL (WINAPI *ALF_Compat_BufferedPaintRenderAnimation)(HWND,HDC);
extern HRESULT (WINAPI *ALF_Compat_GetThemeTransitionDuration)(HTHEME,int,int,int,int,DWORD*);