dib.h File Reference

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Functions
HBITMAP	CreateDIBWithProperties (int width, int height)
HBITMAP	CreateColorDIB (int width, int height, COLORREF rgb)
static HBITMAP	CopyDIBImage (HBITMAP hbm, INT cx=0, INT cy=0)
int	GetDIBWidth (HBITMAP hbm)
int	GetDIBHeight (HBITMAP hbm)
BOOL	SaveDIBToFile (HBITMAP hBitmap, LPTSTR FileName, HDC hDC)
HBITMAP	DoLoadImageFile (HWND hwnd, LPCTSTR name, BOOL fIsMainFile)
void	ShowFileLoadError (LPCTSTR name)
HBITMAP	SetBitmapAndInfo (HBITMAP hBitmap, LPCTSTR name, DWORD dwFileSize, BOOL isFile)
HBITMAP	Rotate90DegreeBlt (HDC hDC1, INT cx, INT cy, BOOL bRight)
HBITMAP	SkewDIB (HDC hDC1, HBITMAP hbm, INT nDegree, BOOL bVertical)

Function Documentation

CopyDIBImage()

static HBITMAP CopyDIBImage ( HBITMAP  hbm, INT  cx = 0, INT  cy = 0  )

inlinestatic

Definition at line 14 of file dib.h.

{
    return (HBITMAP)CopyImage(hbm, IMAGE_BITMAP, cx, cy, LR_COPYRETURNORG | LR_CREATEDIBSECTION);
}

Referenced by ImageModel::CopyPrevious(), SelectionModel::InsertFromHBITMAP(), CMainWindow::OnCommand(), ImageModel::ResetToPrevious(), SkewDIB(), ImageModel::StretchSkew(), and SelectionModel::StretchSkew().

CreateColorDIB()

HBITMAP CreateColorDIB	(	int	width,
		int	height,
		COLORREF	rgb
	)

Definition at line 31 of file dib.cpp.

{
    HBITMAP ret = CreateDIBWithProperties(width, height);
    if (!ret)
        return NULL;

    if (rgb)
    {
        HDC hdc = CreateCompatibleDC(NULL);
        HGDIOBJ hbmOld = SelectObject(hdc, ret);
        RECT rc;
        SetRect(&rc, 0, 0, width, height);
        HBRUSH hbr = CreateSolidBrush(rgb);
        FillRect(hdc, &rc, hbr);
        DeleteObject(hbr);
        SelectObject(hdc, hbmOld);
        DeleteDC(hdc);
    }

    return ret;
}

Referenced by SetBitmapAndInfo(), and SkewDIB().

CreateDIBWithProperties()

HBITMAP CreateDIBWithProperties	(	int	width,
		int	height
	)

Definition at line 17 of file dib.cpp.

{
    BITMAPINFO bmi;
    ZeroMemory(&bmi, sizeof(BITMAPINFO));
    bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
    bmi.bmiHeader.biWidth = width;
    bmi.bmiHeader.biHeight = height;
    bmi.bmiHeader.biPlanes = 1;
    bmi.bmiHeader.biBitCount = 24;
    bmi.bmiHeader.biCompression = BI_RGB;
    return CreateDIBSection(NULL, &bmi, DIB_RGB_COLORS, NULL, NULL, 0);
}

Referenced by SelectionModel::CalculateBoundingBoxAndContents(), SelectionModel::CalculateContents(), CreateColorDIB(), ImageModel::Crop(), ImageModel::ImageModel(), Rotate90DegreeBlt(), and SelectionModel::ScaleContentsToFit().

DoLoadImageFile()

HBITMAP DoLoadImageFile	(	HWND	hwnd,
		LPCTSTR	name,
		BOOL	fIsMainFile
	)

Definition at line 160 of file dib.cpp.

{
    // find the file
    WIN32_FIND_DATA find;
    HANDLE hFind = FindFirstFile(name, &find);
    if (hFind == INVALID_HANDLE_VALUE)
    {
        // does not exist
        CStringW strText;
        strText.Format(IDS_LOADERRORTEXT, name);
        MessageBoxW(hwnd, strText, NULL, MB_ICONERROR);
        return NULL;
    }
    DWORD dwFileSize = find.nFileSizeLow; // get file size
    FindClose(hFind);

    // is file empty?
    if (dwFileSize == 0)
    {
        if (fIsMainFile)
        {
            FILETIME ft;
            FileTimeToLocalFileTime(&find.ftLastWriteTime, &ft);
            FileTimeToSystemTime(&ft, &fileTime);
            return SetBitmapAndInfo(NULL, name, dwFileSize, TRUE);
        }
    }

    // load the image
    CImage img;
    img.Load(name);
    HBITMAP hBitmap = img.Detach();

    if (hBitmap == NULL)
    {
        // cannot open
        CStringW strText;
        strText.Format(IDS_LOADERRORTEXT, name);
        MessageBoxW(hwnd, strText, NULL, MB_ICONERROR);
        return NULL;
    }

    if (fIsMainFile)
    {
        FILETIME ft;
        FileTimeToLocalFileTime(&find.ftLastWriteTime, &ft);
        FileTimeToSystemTime(&ft, &fileTime);
        SetBitmapAndInfo(hBitmap, name, dwFileSize, TRUE);
    }

    return hBitmap;
}

Referenced by _tWinMain(), CMainWindow::OnCommand(), and CMainWindow::OnDropFiles().

GetDIBHeight()

int GetDIBHeight

(

HBITMAP

hbm

)

Definition at line 62 of file dib.cpp.

{
    BITMAP bm;
    GetObject(hBitmap, sizeof(BITMAP), &bm);
    return bm.bmHeight;
}

Referenced by SelectionModel::DrawSelectionStretched(), ImageModel::GetHeight(), SelectionModel::InsertFromHBITMAP(), CMainWindow::InsertSelectionFromHBITMAP(), and SelectionModel::ScaleContentsToFit().

GetDIBWidth()

int GetDIBWidth

(

HBITMAP

hbm

)

Definition at line 54 of file dib.cpp.

{
    BITMAP bm;
    GetObject(hBitmap, sizeof(BITMAP), &bm);
    return bm.bmWidth;
}

Referenced by SelectionModel::DrawSelectionStretched(), ImageModel::GetWidth(), SelectionModel::InsertFromHBITMAP(), CMainWindow::InsertSelectionFromHBITMAP(), and SelectionModel::ScaleContentsToFit().

Rotate90DegreeBlt()

HBITMAP Rotate90DegreeBlt	(	HDC	hDC1,
		INT	cx,
		INT	cy,
		BOOL	bRight
	)

Definition at line 213 of file dib.cpp.

{
    HBITMAP hbm2 = CreateDIBWithProperties(cy, cx);
    if (!hbm2)
        return NULL;

    HDC hDC2 = CreateCompatibleDC(NULL);
    HGDIOBJ hbm2Old = SelectObject(hDC2, hbm2);
    if (bRight)
    {
        for (INT y = 0; y < cy; ++y)
        {
            for (INT x = 0; x < cx; ++x)
            {
                COLORREF rgb = GetPixel(hDC1, x, y);
                SetPixelV(hDC2, cy - (y + 1), x, rgb);
            }
        }
    }
    else
    {
        for (INT y = 0; y < cy; ++y)
        {
            for (INT x = 0; x < cx; ++x)
            {
                COLORREF rgb = GetPixel(hDC1, x, y);
                SetPixelV(hDC2, y, cx - (x + 1), rgb);
            }
        }
    }
    SelectObject(hDC2, hbm2Old);
    DeleteDC(hDC2);
    return hbm2;
}

Referenced by ImageModel::RotateNTimes90Degrees(), and SelectionModel::RotateNTimes90Degrees().

SaveDIBToFile()

BOOL SaveDIBToFile	(	HBITMAP	hBitmap,
		LPTSTR	FileName,
		HDC	hDC
	)

Definition at line 69 of file dib.cpp.

{
    CImage img;
    img.Attach(hBitmap);
    img.Save(FileName);  // TODO: error handling
    img.Detach();

    WIN32_FIND_DATA find;
    HANDLE hFind = FindFirstFile(FileName, &find);
    if (hFind == INVALID_HANDLE_VALUE)
    {
        ShowFileLoadError(FileName);
        return FALSE;
    }
    FindClose(hFind);

    // update time and size
    FILETIME ft;
    FileTimeToLocalFileTime(&find.ftLastWriteTime, &ft);
    FileTimeToSystemTime(&ft, &fileTime);
    fileSize = find.nFileSizeLow;

    // TODO: update hRes and vRes

    registrySettings.SetMostRecentFile(FileName);

    isAFile = TRUE;
    imageSaved = TRUE;
    return TRUE;
}

Referenced by CMainWindow::OnCommand(), and ImageModel::SaveImage().

SetBitmapAndInfo()

HBITMAP SetBitmapAndInfo	(	HBITMAP	hBitmap,
		LPCTSTR	name,
		DWORD	dwFileSize,
		BOOL	isFile
	)

Definition at line 109 of file dib.cpp.

{
    if (hBitmap == NULL)
    {
        COLORREF white = RGB(255, 255, 255);
        hBitmap = CreateColorDIB(registrySettings.BMPWidth,
                                 registrySettings.BMPHeight, white);
        if (hBitmap == NULL)
            return FALSE;

        fileHPPM = fileVPPM = 2834;
        ZeroMemory(&fileTime, sizeof(fileTime));
        isFile = FALSE;
    }
    else
    {
        // update PPMs
        HDC hScreenDC = GetDC(NULL);
        fileHPPM = (int)(GetDeviceCaps(hScreenDC, LOGPIXELSX) * 1000 / 25.4);
        fileVPPM = (int)(GetDeviceCaps(hScreenDC, LOGPIXELSY) * 1000 / 25.4);
        ReleaseDC(NULL, hScreenDC);
    }

    // update image
    imageModel.Insert(hBitmap);
    imageModel.ClearHistory();

    // update fileSize
    fileSize = dwFileSize;

    // update filepathname
    if (name && name[0])
        GetFullPathName(name, _countof(filepathname), filepathname, NULL);
    else
        LoadString(hProgInstance, IDS_DEFAULTFILENAME, filepathname, _countof(filepathname));

    // set title
    CString strTitle;
    strTitle.Format(IDS_WINDOWTITLE, PathFindFileName(filepathname));
    mainWindow.SetWindowText(strTitle);

    // update file info and recent
    isAFile = isFile;
    if (isAFile)
        registrySettings.SetMostRecentFile(filepathname);

    imageSaved = TRUE;

    return hBitmap;
}

Referenced by DoLoadImageFile(), and CMainWindow::OnCommand().

ShowFileLoadError()

void ShowFileLoadError

(

LPCTSTR

name

)

Definition at line 100 of file dib.cpp.

{
    CString strText;
    strText.Format(IDS_LOADERRORTEXT, (LPCTSTR) name);
    CString strProgramName;
    strProgramName.LoadString(IDS_PROGRAMNAME);
    mainWindow.MessageBox(strText, strProgramName, MB_OK | MB_ICONEXCLAMATION);
}

Referenced by SaveDIBToFile().

SkewDIB()

HBITMAP SkewDIB	(	HDC	hDC1,
		HBITMAP	hbm,
		INT	nDegree,
		BOOL	bVertical
	)

Definition at line 252 of file dib.cpp.

{
    if (nDegree == 0)
        return CopyDIBImage(hbm);

    const double eTan = tan(abs(nDegree) * M_PI / 180);

    BITMAP bm;
    GetObjectW(hbm, sizeof(bm), &bm);
    INT cx = bm.bmWidth, cy = bm.bmHeight, dx = 0, dy = 0;
    if (bVertical)
        dy = INT(cx * eTan);
    else
        dx = INT(cy * eTan);

    if (dx == 0 && dy == 0)
        return CopyDIBImage(hbm);

    HBITMAP hbmNew = CreateColorDIB(cx + dx, cy + dy, RGB(255, 255, 255));
    if (!hbmNew)
        return NULL;

    HDC hDC2 = CreateCompatibleDC(NULL);
    HGDIOBJ hbm2Old = SelectObject(hDC2, hbmNew);
    if (bVertical)
    {
        for (INT x = 0; x < cx; ++x)
        {
            INT delta = INT(x * eTan);
            if (nDegree > 0)
                BitBlt(hDC2, x, (dy - delta), 1, cy, hDC1, x, 0, SRCCOPY);
            else
                BitBlt(hDC2, x, delta, 1, cy, hDC1, x, 0, SRCCOPY);
        }
    }
    else
    {
        for (INT y = 0; y < cy; ++y)
        {
            INT delta = INT(y * eTan);
            if (nDegree > 0)
                BitBlt(hDC2, (dx - delta), y, cx, 1, hDC1, 0, y, SRCCOPY);
            else
                BitBlt(hDC2, delta, y, cx, 1, hDC1, 0, y, SRCCOPY);
        }
    }
    SelectObject(hDC2, hbm2Old);
    DeleteDC(hDC2);
    return hbmNew;
}

Referenced by ImageModel::StretchSkew(), and SelectionModel::StretchSkew().