winutils.h File Reference

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Go to the source code of this file.

Functions
void	ShowLastWin32Error (HWND hwndParent)
void	BringWindowToFront (HWND hWnd)
int	MessageBoxRes (HWND hWnd, HINSTANCE hInstance, UINT uText, UINT uCaption, UINT uType)
void	DrawTextFromResource (HINSTANCE hInstance, UINT uID, HDC hDC, LPRECT lpRect, UINT uFormat)
void	DrawTextFromClipboard (UINT uFormat, PAINTSTRUCT ps, SCROLLSTATE state)
void	BitBltFromClipboard (PAINTSTRUCT ps, SCROLLSTATE state, DWORD dwRop)
void	SetDIBitsToDeviceFromClipboard (UINT uFormat, PAINTSTRUCT ps, SCROLLSTATE state, UINT fuColorUse)
void	PlayMetaFileFromClipboard (HDC hdc, const RECT *lpRect)
void	PlayEnhMetaFileFromClipboard (HDC hdc, const RECT *lpRect)
BOOL	RealizeClipboardPalette (HDC hdc)

Function Documentation

BitBltFromClipboard()

void BitBltFromClipboard	(	PAINTSTRUCT	ps,
		SCROLLSTATE	state,
		DWORD	dwRop
	)

Definition at line 155 of file winutils.c.

Referenced by OnPaint().

{
    HDC hdcMem;
    HBITMAP hBitmap;
    BITMAP bmp;
    LONG bmWidth, bmHeight;

    hdcMem = CreateCompatibleDC(ps.hdc);
    if (!hdcMem)
        return;

    hBitmap = (HBITMAP)GetClipboardData(CF_BITMAP);
    GetObjectW(hBitmap, sizeof(bmp), &bmp);

    SelectObject(hdcMem, hBitmap);

    bmWidth  = min(ps.rcPaint.right  - ps.rcPaint.left, bmp.bmWidth  - ps.rcPaint.left - state.CurrentX);
    bmHeight = min(ps.rcPaint.bottom - ps.rcPaint.top , bmp.bmHeight - ps.rcPaint.top  - state.CurrentY);

    BitBlt(ps.hdc,
           ps.rcPaint.left,
           ps.rcPaint.top,
           bmWidth,
           bmHeight,
           hdcMem,
           ps.rcPaint.left + state.CurrentX,
           ps.rcPaint.top  + state.CurrentY,
           dwRop);

    DeleteDC(hdcMem);
}

BringWindowToFront()

void BringWindowToFront

(

HWND

hWnd

)

Definition at line 36 of file winutils.c.

Referenced by wWinMain().

{
    if (IsIconic(hWnd))
    {
        ShowWindow(hWnd, SW_RESTORE);
        SetForegroundWindow(hWnd);
    }
    else
    {
        SetForegroundWindow(hWnd);
    }
}

DrawTextFromClipboard()

void DrawTextFromClipboard	(	UINT	uFormat,
		PAINTSTRUCT	ps,
		SCROLLSTATE	state
	)

Definition at line 75 of file winutils.c.

Referenced by OnPaint().

{
    POINT ptOrg;
    HGLOBAL hGlobal;
    PVOID lpText, ptr;
    SIZE_T lineSize;
    INT FirstLine, LastLine;

    hGlobal = GetClipboardData(uFormat);
    if (!hGlobal)
        return;

    lpText = GlobalLock(hGlobal);
    if (!lpText)
        return;

    /* Find the first and last line indices to display (Note that CurrentX/Y are in pixels!) */
    FirstLine = max(0, (state.CurrentY + ps.rcPaint.top) / Globals.CharHeight);
    // LastLine = min(LINES - 1, (state.CurrentY + ps.rcPaint.bottom) / Globals.CharHeight);
    // NOTE: Can be less or greater than the actual number of lines in the text.
    LastLine = (state.CurrentY + ps.rcPaint.bottom) / Globals.CharHeight;

    /* Find the first text line to display */
    while (FirstLine > 0)
    {
        if (uFormat == CF_UNICODETEXT)
        {
            if (*(LPCWSTR)lpText == UNICODE_NULL)
                break;
            GetLineExtentW(lpText, (LPCWSTR*)&ptr);
        }
        else
        {
            if (*(LPCSTR)lpText == ANSI_NULL)
                break;
            GetLineExtentA(lpText, (LPCSTR*)&ptr);
        }

        --FirstLine;
        --LastLine;

        lpText = ptr;
    }

    ptOrg.x = ps.rcPaint.left;
    ptOrg.y = /* FirstLine */ max(0, (state.CurrentY + ps.rcPaint.top) / Globals.CharHeight)
                    * Globals.CharHeight - state.CurrentY;

    /* Display each line from the current one up to the last one */
    ++LastLine;
    while (LastLine >= 0)
    {
        if (uFormat == CF_UNICODETEXT)
        {
            if (*(LPCWSTR)lpText == UNICODE_NULL)
                break;
            lineSize = GetLineExtentW(lpText, (LPCWSTR*)&ptr);
            TabbedTextOutW(ps.hdc, /*ptOrg.x*/0 - state.CurrentX, ptOrg.y,
                           lpText, lineSize, 0, NULL,
                           /*ptOrg.x*/0 - state.CurrentX);
        }
        else
        {
            if (*(LPCSTR)lpText == ANSI_NULL)
                break;
            lineSize = GetLineExtentA(lpText, (LPCSTR*)&ptr);
            TabbedTextOutA(ps.hdc, /*ptOrg.x*/0 - state.CurrentX, ptOrg.y,
                           lpText, lineSize, 0, NULL,
                           /*ptOrg.x*/0 - state.CurrentX);
        }

        --LastLine;

        ptOrg.y += Globals.CharHeight;
        lpText = ptr;
    }

    GlobalUnlock(hGlobal);
}

DrawTextFromResource()

void DrawTextFromResource	(	HINSTANCE	hInstance,
		UINT	uID,
		HDC	hDC,
		LPRECT	lpRect,
		UINT	uFormat
	)

Definition at line 65 of file winutils.c.

Referenced by OnPaint().

{
    LPWSTR lpBuffer;
    int nCount;

    nCount = LoadStringW(hInstance, uID, (LPWSTR)&lpBuffer, 0);
    if (nCount)
        DrawTextW(hDC, lpBuffer, nCount, lpRect, uFormat);
}

MessageBoxRes()

int MessageBoxRes	(	HWND	hWnd,
		HINSTANCE	hInstance,
		UINT	uText,
		UINT	uCaption,
		UINT	uType
	)

Definition at line 49 of file winutils.c.

Referenced by LoadClipboardDataFromFile(), OnCommand(), ReadClipboardFile(), and WriteClipboardFile().

{
    MSGBOXPARAMSW mb;

    ZeroMemory(&mb, sizeof(mb));
    mb.cbSize = sizeof(mb);
    mb.hwndOwner = hWnd;
    mb.hInstance = hInstance;
    mb.lpszText = MAKEINTRESOURCEW(uText);
    mb.lpszCaption = MAKEINTRESOURCEW(uCaption);
    mb.dwStyle = uType;
    mb.dwLanguageId = MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT);

    return MessageBoxIndirectW(&mb);
}

PlayEnhMetaFileFromClipboard()

void PlayEnhMetaFileFromClipboard	(	HDC	hdc,
		const RECT *	lpRect
	)

Definition at line 326 of file winutils.c.

Referenced by OnPaint().

{
    HENHMETAFILE hEmf;

    hEmf = GetClipboardData(CF_ENHMETAFILE);
    PlayEnhMetaFile(hdc, hEmf, lpRect);
}

PlayMetaFileFromClipboard()

void PlayMetaFileFromClipboard	(	HDC	hdc,
		const RECT *	lpRect
	)

Definition at line 306 of file winutils.c.

Referenced by OnPaint().

{
    LPMETAFILEPICT mp;
    HGLOBAL hGlobal;

    hGlobal = GetClipboardData(CF_METAFILEPICT);
    if (!hGlobal)
        return;

    mp = (LPMETAFILEPICT)GlobalLock(hGlobal);
    if (!mp)
        return;

    SetMapMode(hdc, mp->mm);
    SetViewportExtEx(hdc, lpRect->right, lpRect->bottom, NULL);
    SetViewportOrgEx(hdc, lpRect->left, lpRect->top, NULL);
    PlayMetaFile(hdc, mp->hMF);
    GlobalUnlock(hGlobal);
}

RealizeClipboardPalette()

BOOL RealizeClipboardPalette

(

HDC

hdc

)

Definition at line 334 of file winutils.c.

Referenced by MainWndProc(), and OnPaint().

{
    BOOL Success;
    HPALETTE hPalette, hOldPalette;

    if (!IsClipboardFormatAvailable(CF_PALETTE))
        return FALSE;

    hPalette = GetClipboardData(CF_PALETTE);
    if (!hPalette)
        return FALSE;

    hOldPalette = SelectPalette(hdc, hPalette, FALSE);
    if (!hOldPalette)
        return FALSE;

    Success = (RealizePalette(hdc) != GDI_ERROR);

    SelectPalette(hdc, hOldPalette, FALSE);

    return Success;
}

SetDIBitsToDeviceFromClipboard()

void SetDIBitsToDeviceFromClipboard	(	UINT	uFormat,
		PAINTSTRUCT	ps,
		SCROLLSTATE	state,
		UINT	fuColorUse
	)

Definition at line 187 of file winutils.c.

Referenced by OnPaint().

{
    HGLOBAL hGlobal;
    LPBITMAPINFOHEADER lpInfoHeader;
    LPBYTE lpBits;
    LONG bmWidth, bmHeight;
    DWORD dwPalSize = 0;

    hGlobal = GetClipboardData(uFormat);
    if (!hGlobal)
        return;

    lpInfoHeader = GlobalLock(hGlobal);
    if (!lpInfoHeader)
        return;

    if (lpInfoHeader->biSize == sizeof(BITMAPCOREHEADER))
    {
        LPBITMAPCOREHEADER lpCoreHeader = (LPBITMAPCOREHEADER)lpInfoHeader;

        dwPalSize = 0;

        if (lpCoreHeader->bcBitCount <= 8)
        {
            dwPalSize = (1 << lpCoreHeader->bcBitCount);

            if (fuColorUse == DIB_RGB_COLORS)
                dwPalSize *= sizeof(RGBTRIPLE);
            else
                dwPalSize *= sizeof(WORD);
        }

        bmWidth  = lpCoreHeader->bcWidth;
        bmHeight = lpCoreHeader->bcHeight;
    }
    else if ((lpInfoHeader->biSize == sizeof(BITMAPINFOHEADER)) ||
             (lpInfoHeader->biSize == sizeof(BITMAPV4HEADER))   ||
             (lpInfoHeader->biSize == sizeof(BITMAPV5HEADER)))
    {
        dwPalSize = lpInfoHeader->biClrUsed;

        if ((dwPalSize == 0) && (lpInfoHeader->biBitCount <= 8))
            dwPalSize = (1 << lpInfoHeader->biBitCount);

        if (fuColorUse == DIB_RGB_COLORS)
            dwPalSize *= sizeof(RGBQUAD);
        else
            dwPalSize *= sizeof(WORD);

        if (/*(lpInfoHeader->biSize == sizeof(BITMAPINFOHEADER)) &&*/
            (lpInfoHeader->biCompression == BI_BITFIELDS))
        {
            dwPalSize += 3 * sizeof(DWORD);
        }

        /*
         * This is a (disabled) hack for Windows, when uFormat == CF_DIB
         * it needs yet another extra 3 DWORDs, in addition to the
         * ones already taken into account in via the compression.
         * This problem doesn't happen when uFormat == CF_DIBV5
         * (in that case, when compression is taken into account,
         * everything is nice).
         *
         * NOTE 1: This fix is only for us, because when one pastes DIBs
         * directly in apps, the bitmap offset problem is still present.
         *
         * NOTE 2: The problem can be seen with Windows' clipbrd.exe if
         * one copies a CF_DIB image in the clipboard. By default Windows'
         * clipbrd.exe works with CF_DIBV5 and CF_BITMAP, so the problem
         * is unseen, and the clipboard doesn't have to convert to CF_DIB.
         *
         * FIXME: investigate!!
         * ANSWER: this is a Windows bug; part of the answer is there:
         * https://social.msdn.microsoft.com/Forums/windowsdesktop/en-US/ac7ab3b5-8609-4478-b86a-976dab44c271/bug-clipboard-format-conversions-cfdib-cfdibv5-cfdib
         * May be related:
         * https://blog.talosintelligence.com/2015/10/dangerous-clipboard.html
         */
#if 0
        if ((lpInfoHeader->biSize == sizeof(BITMAPINFOHEADER)) &&
            (lpInfoHeader->biCompression == BI_BITFIELDS))
        {
            dwPalSize += 3 * sizeof(DWORD);
        }
#endif

        bmWidth  = lpInfoHeader->biWidth;
        /* NOTE: biHeight < 0 for bottom-up DIBs, or > 0 for top-down DIBs */
        bmHeight = lpInfoHeader->biHeight;
    }
    else
    {
        /* Invalid format */
        GlobalUnlock(hGlobal);
        return;
    }

    lpBits = (LPBYTE)lpInfoHeader + lpInfoHeader->biSize + dwPalSize;

    /*
     * The seventh parameter (YSrc) of SetDIBitsToDevice always designates
     * the Y-coordinate of the "lower-left corner" of the image, be the DIB
     * in bottom-up or top-down mode.
     */
    SetDIBitsToDevice(ps.hdc,
                      -state.CurrentX, // ps.rcPaint.left,
                      -state.CurrentY, // ps.rcPaint.top,
                      bmWidth,
                      bmHeight,
                      0, // ps.rcPaint.left + state.CurrentX,
                      0, // -(ps.rcPaint.top  + state.CurrentY),
                      0, // uStartScan,
                      bmHeight,
                      lpBits,
                      (LPBITMAPINFO)lpInfoHeader,
                      fuColorUse);

    GlobalUnlock(hGlobal);
}

ShowLastWin32Error()

void ShowLastWin32Error

(

HWND

hwndParent

)

Definition at line 11 of file winutils.c.

{
    DWORD dwError;
    LPWSTR lpMsgBuf = NULL;

    dwError = GetLastError();
    if (dwError == ERROR_SUCCESS)
        return;

    if (!FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER |
                        FORMAT_MESSAGE_FROM_SYSTEM |
                        FORMAT_MESSAGE_IGNORE_INSERTS,
                        NULL,
                        dwError,
                        LANG_USER_DEFAULT,
                        (LPWSTR)&lpMsgBuf,
                        0, NULL))
    {
        return;
    }

    MessageBoxW(hwndParent, lpMsgBuf, NULL, MB_OK | MB_ICONERROR);
    LocalFree(lpMsgBuf);
}