root/lang/objective-cplusplus/i3/trunk/tmp/dwmedit/WindowsVersionHelp.h @ 38656

#pragma once

#include <windows.h>

#ifdef _MSC_VER
#define HAVE_UXTHEME_H 1
#define HAVE_DWMAPI_H 1
#define HAVE_DBGHELP_H 1
#define HAVE_HPAINTBUFFER 1
#endif

#ifdef __CYGWIN__
#define _T(x) TEXT(x)
#else
#include <tchar.h>
#endif

#ifndef _ALLOCA_S_THRESHOLD
#define _ALLOCA_S_THRESHOLD 1024
#endif

#ifndef MSFTEDIT_CLASS
#define MSFTEDIT_CLASS TEXT("RichEdit50W")
#endif

#ifdef HAVE_UXTHEME_H
#  include <uxtheme.h>
#else
namespace windows_version_help {
typedef HANDLE HTHEME;
HRESULT WINAPI DrawThemeBackground(HTHEME,HDC,int,int,LPCRECT,LPCRECT);
typedef struct _MARGINS {
    int cxLeftWidth;      // width of left border that retains its size
    int cxRightWidth;     // width of right border that retains its size
    int cyTopHeight;      // height of top border that retains its size
    int cyBottomHeight;   // height of bottom border that retains its size
} MARGINS;
typedef MARGINS* PMARGINS;
}
#endif

#if !defined(HAVE_UXTHEME_H) || !defined(HAVE_HPAINTBUFFER)
namespace windows_version_help {
typedef struct _BP_PAINTPARAMS {
    DWORD cbSize;
    DWORD dwFlags;
    const RECT *prcExclude;
    const BLENDFUNCTION *pBlendFunction;
} BP_PAINTPARAMS, *PBP_PAINTPARAMS;
typedef HANDLE HPAINTBUFFER;
typedef enum _BP_BUFFERFORMAT {
    BPBF_COMPATIBLEBITMAP,
    BPBF_DIB,
    BPBF_TOPDOWNDIB,
    BPBF_TOPDOWNMONODIB
} BP_BUFFERFORMAT;
}
#define BPPF_ERASE               0x0001 // Empty the buffer during BeginBufferedPaint()
#define BPPF_NOCLIP              0x0002 // Don't apply the target DC's clip region to the double buffer
#define BPPF_NONCLIENT           0x0004 // Using a non-client DC
#define ULW_EX_NORESIZE         0x00000008
#endif

#ifdef HAVE_DWMAPI_H
#  include <dwmapi.h>
#else
namespace windows_version_help {
typedef enum _DWMWINDOWATTRIBUTE {
    DWMWA_NCRENDERING_ENABLED = 1,
    DWMWA_NCRENDERING_POLICY,
    DWMWA_TRANSITIONS_FORCEDISABLED,
    DWMWA_ALLOW_NCPAINT,
    DWMWA_CAPTION_BUTTON_BOUNDS,
    DWMWA_NONCLIENT_RTL_LAYOUT,
    DWMWA_FORCE_ICONIC_REPRESENTATION,
    DWMWA_FLIP3D_POLICY,
    DWMWA_EXTENDED_FRAME_BOUNDS,
    DWMWA_HAS_ICONIC_BITMAP,
    DWMWA_DISALLOW_PEEK,
    DWMWA_EXCLUDED_FROM_PEEK,
    DWMWA_LAST
} DWMWINDOWATTRIBUTE;
// Blur behind data structures
#define DWM_BB_ENABLE                 0x00000001  // fEnable has been specified
#define DWM_BB_BLURREGION             0x00000002  // hRgnBlur has been specified
#define DWM_BB_TRANSITIONONMAXIMIZED  0x00000004  // fTransitionOnMaximized has been specified
typedef struct _DWM_BLURBEHIND {
    DWORD dwFlags;
    BOOL fEnable;
    HRGN hRgnBlur;
    BOOL fTransitionOnMaximized;
} DWM_BLURBEHIND, *PDWM_BLURBEHIND;
}
#endif

namespace windows_version_help {

struct WindowsVersionHelpDLL {
    HRESULT (WINAPI *DwmExtendFrameIntoClientArea)(HWND, const MARGINS*);
    HRESULT (WINAPI *DwmIsCompositionEnabled)(BOOL*);
    HRESULT (WINAPI *DwmEnableBlurBehindWindow)(HWND, const DWM_BLURBEHIND*);
    HRESULT (WINAPI *DwmGetColorizationColor)(DWORD*, BOOL*);
    HRESULT (WINAPI *DwmGetWindowAttribute)(HWND, DWORD, void*,DWORD);
    HPAINTBUFFER (WINAPI *BeginBufferedPaint)(HDC, const RECT*, BP_BUFFERFORMAT, BP_PAINTPARAMS*, HDC*);
    HRESULT (WINAPI *BufferedPaintInit)(void);
    HRESULT (WINAPI *BufferedPaintUnInit)(void);
    HRESULT (WINAPI *EndBufferedPaint)(HPAINTBUFFER, BOOL);
    HRESULT (WINAPI *BufferedPaintSetAlpha)(HPAINTBUFFER, const RECT*, BYTE);
    PVOID (WINAPI *ImageDirectoryEntryToData)(PVOID, BOOLEAN, USHORT, PULONG);

    void init() {

#define SET_DLL_ADDRESS(module, name)                           \
        { /* strict aliasing */                                 \
            void* pointer = (void*)&this->name;                 \
            void** pointer2 = (void**)pointer;                  \
            *pointer2 = (void*)GetProcAddress(module, #name);   \
        }
        
        HMODULE dwmapi_dll = LoadLibrary(TEXT("dwmapi.dll"));
        if (dwmapi_dll) {
            SET_DLL_ADDRESS(dwmapi_dll, DwmExtendFrameIntoClientArea);
            SET_DLL_ADDRESS(dwmapi_dll, DwmIsCompositionEnabled);
            SET_DLL_ADDRESS(dwmapi_dll, DwmEnableBlurBehindWindow);
            SET_DLL_ADDRESS(dwmapi_dll, DwmGetColorizationColor);
            SET_DLL_ADDRESS(dwmapi_dll, DwmGetWindowAttribute);
        }

        HMODULE uxtheme_dll = LoadLibrary(TEXT("uxtheme.dll"));
        if (uxtheme_dll) {
            SET_DLL_ADDRESS(uxtheme_dll, BeginBufferedPaint);
            SET_DLL_ADDRESS(uxtheme_dll, BufferedPaintInit);
            SET_DLL_ADDRESS(uxtheme_dll, BufferedPaintUnInit);
            SET_DLL_ADDRESS(uxtheme_dll, EndBufferedPaint);
            SET_DLL_ADDRESS(uxtheme_dll, BufferedPaintSetAlpha);
        }

        HMODULE dbghelp_dll = LoadLibrary(TEXT("dbghelp.dll"));
        if (dbghelp_dll) {
            SET_DLL_ADDRESS(dbghelp_dll, ImageDirectoryEntryToData);
        }

#undef SET_DLL_ADDRESS

    }
};

}

using namespace windows_version_help;