dib.cpp File Reference

#include "precomp.h"

Include dependency graph for dib.cpp:

Go to the source code of this file.

Classes
struct	BITMAPINFOEX
struct	BITMAPINFODX

Macros
#define	WIDTHBYTES(i)   (((i) + 31) / 32 * 4)

Functions
float	PpcmFromDpi (float dpi)
HBITMAP	CreateDIBWithProperties (int width, int height)
HBITMAP	CreateMonoBitmap (int width, int height, BOOL bWhite)
HBITMAP	CreateColorDIB (int width, int height, COLORREF rgb)
HBITMAP	CopyMonoImage (HBITMAP hbm, INT cx, INT cy)
HBITMAP	CachedBufferDIB (HBITMAP hbm, int minimalWidth, int minimalHeight)
int	GetDIBWidth (HBITMAP hBitmap)
int	GetDIBHeight (HBITMAP hBitmap)
BOOL	SaveDIBToFile (HBITMAP hBitmap, LPCWSTR FileName, BOOL fIsMainFile, REFGUID guidFileType)
void	SetFileInfo (LPCWSTR name, LPWIN32_FIND_DATAW pFound, BOOL isAFile)
HBITMAP	InitializeImage (LPCWSTR name, LPWIN32_FIND_DATAW pFound, BOOL isFile)
HBITMAP	SetBitmapAndInfo (HBITMAP hBitmap, LPCWSTR name, LPWIN32_FIND_DATAW pFound, BOOL isFile)
HBITMAP	DoLoadImageFile (HWND hwnd, LPCWSTR name, BOOL fIsMainFile)
HBITMAP	Rotate90DegreeBlt (HDC hDC1, INT cx, INT cy, BOOL bRight, BOOL bMono)
HBITMAP	SkewDIB (HDC hDC1, HBITMAP hbm, INT nDegree, BOOL bVertical, BOOL bMono)
HGLOBAL	BitmapToClipboardDIB (HBITMAP hBitmap)
HBITMAP	BitmapFromClipboardDIB (HGLOBAL hGlobal)
HBITMAP	BitmapFromHEMF (HENHMETAFILE hEMF)
BOOL	IsBitmapBlackAndWhite (HBITMAP hbm)
HBITMAP	ConvertToBlackAndWhite (HBITMAP hbm)

Variables
INT	g_fileSize = 0
float	g_xDpi = 96
float	g_yDpi = 96
SYSTEMTIME	g_fileTime

Macro Definition Documentation

WIDTHBYTES

#define WIDTHBYTES

(

i

)

(((i) + 31) / 32 * 4)

Definition at line 15 of file dib.cpp.

Function Documentation

BitmapFromClipboardDIB()

HBITMAP BitmapFromClipboardDIB

(

HGLOBAL

hGlobal

)

Definition at line 467 of file dib.cpp.

{
    CWaitCursor waitCursor;
 
    LPBYTE pb = (LPBYTE)GlobalLock(hGlobal);
    if (!pb)
        return NULL;
 
    LPBITMAPINFO pbmi = (LPBITMAPINFO)pb;
    pb += pbmi->bmiHeader.biSize;
 
    INT cColors = 0, cbColors = 0;
    if (pbmi->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
    {
        LPBITMAPCOREINFO pbmci = (LPBITMAPCOREINFO)pbmi;
        WORD BitCount = pbmci->bmciHeader.bcBitCount;
        if (BitCount < 16)
        {
            cColors = (1 << BitCount);
            cbColors = cColors * sizeof(RGBTRIPLE);
            pb += cbColors;
        }
    }
    else if (pbmi->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER))
    {
        WORD BitCount = pbmi->bmiHeader.biBitCount;
        if (BitCount < 16)
        {
            cColors = (1 << BitCount);
            cbColors = cColors * sizeof(RGBQUAD);
            pb += cbColors;
        }
    }
 
    HDC hDC = CreateCompatibleDC(NULL);
    HBITMAP hBitmap = CreateDIBSection(hDC, pbmi, DIB_RGB_COLORS, NULL, NULL, 0);
    if (hBitmap)
    {
        SetDIBits(hDC, hBitmap, 0, labs(pbmi->bmiHeader.biHeight), pb, pbmi, DIB_RGB_COLORS);
    }
    DeleteDC(hDC);
 
    GlobalUnlock(hGlobal);
 
    return hBitmap;
}

Referenced by CMainWindow::OnCommand().

BitmapFromHEMF()

HBITMAP BitmapFromHEMF

(

HENHMETAFILE

hEMF

)

Definition at line 514 of file dib.cpp.

{
    CWaitCursor waitCursor;
 
    ENHMETAHEADER header;
    if (!GetEnhMetaFileHeader(hEMF, sizeof(header), &header))
        return NULL;
 
    CRect rc = *(LPRECT)&header.rclBounds;
    INT cx = rc.Width(), cy = rc.Height();
    HBITMAP hbm = CreateColorDIB(cx, cy, RGB(255, 255, 255));
    if (!hbm)
        return NULL;
 
    HDC hDC = CreateCompatibleDC(NULL);
    HGDIOBJ hbmOld = SelectObject(hDC, hbm);
    PlayEnhMetaFile(hDC, hEMF, &rc);
    SelectObject(hDC, hbmOld);
    DeleteDC(hDC);
 
    return hbm;
}

Referenced by CMainWindow::OnCommand().

BitmapToClipboardDIB()

HGLOBAL BitmapToClipboardDIB

(

HBITMAP

hBitmap

)

Definition at line 404 of file dib.cpp.

{
    CWaitCursor waitCursor;
 
    BITMAP bm;
    if (!GetObject(hBitmap, sizeof(BITMAP), &bm))
        return NULL;
 
    BITMAPINFODX bmi;
    ZeroMemory(&bmi, sizeof(bmi));
    bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
    bmi.bmiHeader.biWidth = bm.bmWidth;
    bmi.bmiHeader.biHeight = bm.bmHeight;
    bmi.bmiHeader.biPlanes = 1;
    bmi.bmiHeader.biBitCount = bm.bmBitsPixel;
    bmi.bmiHeader.biCompression = BI_RGB;
    bmi.bmiHeader.biSizeImage = bm.bmWidthBytes * bm.bmHeight;
 
    INT cColors;
    if (bm.bmBitsPixel < 16)
        cColors = 1 << bm.bmBitsPixel;
    else
        cColors = 0;
 
    HDC hDC = CreateCompatibleDC(NULL);
 
    if (cColors)
    {
        HGDIOBJ hbmOld = SelectObject(hDC, hBitmap);
        cColors = GetDIBColorTable(hDC, 0, cColors, bmi.bmiColors);
        SelectObject(hDC, hbmOld);
    }
 
    DWORD cbColors = cColors * sizeof(RGBQUAD);
    DWORD dwSize = sizeof(BITMAPINFOHEADER) + cbColors + bmi.bmiHeader.biSizeImage;
    HGLOBAL hGlobal = GlobalAlloc(GHND | GMEM_SHARE, dwSize);
    if (hGlobal)
    {
        LPBYTE pb = (LPBYTE)GlobalLock(hGlobal);
        if (pb)
        {
            CopyMemory(pb, &bmi, sizeof(BITMAPINFOHEADER));
            pb += sizeof(BITMAPINFOHEADER);
 
            CopyMemory(pb, bmi.bmiColors, cbColors);
            pb += cbColors;
 
            GetDIBits(hDC, hBitmap, 0, bm.bmHeight, pb, &bmi, DIB_RGB_COLORS);
 
            GlobalUnlock(hGlobal);
        }
        else
        {
            GlobalFree(hGlobal);
            hGlobal = NULL;
        }
    }
 
    DeleteDC(hDC);
 
    return hGlobal;
}

Referenced by CMainWindow::OnCommand().

CachedBufferDIB()

HBITMAP CachedBufferDIB	(	HBITMAP	hbm,
		int	minimalWidth,
		int	minimalHeight
	)

Definition at line 115 of file dib.cpp.

{
    if (minimalWidth <= 0)
        minimalWidth = 1;
    if (minimalHeight <= 0)
        minimalHeight = 1;
 
    BITMAP bm;
    if (!GetObject(hbm, sizeof(bm), &bm))
        hbm = NULL;
 
    if (hbm && minimalWidth <= bm.bmWidth && minimalHeight <= bm.bmHeight)
        return hbm;
 
    if (hbm)
        DeleteObject(hbm);
 
    return CreateDIBWithProperties((minimalWidth * 3) / 2, (minimalHeight * 3) / 2);
}

Referenced by CCanvasWindow::DoDraw(), CMiniatureWindow::OnPaint(), and CPaletteWindow::OnPaint().

ConvertToBlackAndWhite()

HBITMAP ConvertToBlackAndWhite

(

HBITMAP

hbm

)

Definition at line 588 of file dib.cpp.

{
    CWaitCursor waitCursor;
 
    BITMAP bm;
    if (!::GetObject(hbm, sizeof(bm), &bm))
        return NULL;
 
    BITMAPINFOEX bmi;
    ZeroMemory(&bmi, sizeof(bmi));
    bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
    bmi.bmiHeader.biWidth = bm.bmWidth;
    bmi.bmiHeader.biHeight = bm.bmHeight;
    bmi.bmiHeader.biPlanes = 1;
    bmi.bmiHeader.biBitCount = 1;
    bmi.bmiColors[1].rgbBlue = 255;
    bmi.bmiColors[1].rgbGreen = 255;
    bmi.bmiColors[1].rgbRed = 255;
    HDC hdc = ::CreateCompatibleDC(NULL);
    LPVOID pvMonoBits;
    HBITMAP hMonoBitmap = ::CreateDIBSection(hdc, &bmi, DIB_RGB_COLORS, &pvMonoBits, NULL, 0);
    if (!hMonoBitmap)
    {
        ::DeleteDC(hdc);
        return NULL;
    }
 
    HBITMAP hNewBitmap = CreateDIBWithProperties(bm.bmWidth, bm.bmHeight);
    if (hNewBitmap)
    {
        ::GetDIBits(hdc, hbm, 0, bm.bmHeight, pvMonoBits, &bmi, DIB_RGB_COLORS);
        ::SetDIBits(hdc, hNewBitmap, 0, bm.bmHeight, pvMonoBits, &bmi, DIB_RGB_COLORS);
    }
    ::DeleteObject(hMonoBitmap);
    ::DeleteDC(hdc);
 
    return hNewBitmap;
}

Referenced by ImageModel::PushBlackAndWhite().

CopyMonoImage()

HBITMAP CopyMonoImage	(	HBITMAP	hbm,
		INT	cx,
		INT	cy
	)

Definition at line 87 of file dib.cpp.

{
    BITMAP bm;
    if (!GetObject(hbm, sizeof(bm), &bm))
        return NULL;
 
    if (cx == 0 || cy == 0)
    {
        cx = bm.bmWidth;
        cy = bm.bmHeight;
    }
 
    HBITMAP hbmNew = CreateBitmap(cx, cy, 1, 1, NULL);
    if (!hbmNew)
        return NULL;
 
    HDC hdc1 = CreateCompatibleDC(NULL);
    HDC hdc2 = CreateCompatibleDC(NULL);
    HGDIOBJ hbm1Old = SelectObject(hdc1, hbm);
    HGDIOBJ hbm2Old = SelectObject(hdc2, hbmNew);
    StretchBlt(hdc2, 0, 0, cx, cy, hdc1, 0, 0, bm.bmWidth, bm.bmHeight, SRCCOPY);
    SelectObject(hdc1, hbm1Old);
    SelectObject(hdc2, hbm2Old);
    DeleteDC(hdc1);
    DeleteDC(hdc2);
    return hbmNew;
}

Referenced by SelectionModel::StretchSkew().

CreateColorDIB()

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

Definition at line 65 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 BitmapFromHEMF(), ColorKeyedMaskBlt(), SelectionModel::GetSelectionContents(), ImageModel::ImageModel(), InitializeImage(), and SkewDIB().

CreateDIBWithProperties()

HBITMAP CreateDIBWithProperties	(	int	width,
		int	height
	)

Definition at line 32 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;
    return CreateDIBSection(NULL, &bmi, DIB_RGB_COLORS, NULL, NULL, 0);
}

Referenced by CachedBufferDIB(), ConvertToBlackAndWhite(), CreateColorDIB(), ImageModel::Crop(), and Rotate90DegreeBlt().

CreateMonoBitmap()

HBITMAP CreateMonoBitmap	(	int	width,
		int	height,
		BOOL	bWhite
	)

Definition at line 45 of file dib.cpp.

{
    HBITMAP hbm = CreateBitmap(width, height, 1, 1, NULL);
    if (hbm == NULL)
        return NULL;
 
    if (bWhite)
    {
        HDC hdc = CreateCompatibleDC(NULL);
        HGDIOBJ hbmOld = SelectObject(hdc, hbm);
        RECT rc = { 0, 0, width, height };
        FillRect(hdc, &rc, (HBRUSH)GetStockObject(WHITE_BRUSH));
        SelectObject(hdc, hbmOld);
        DeleteDC(hdc);
    }
 
    return hbm;
}

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

DoLoadImageFile()

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

Definition at line 252 of file dib.cpp.

{
    CWaitCursor waitCursor;
 
    // find the file
    WIN32_FIND_DATA find;
    HANDLE hFind = ::FindFirstFileW(name, &find);
    if (hFind == INVALID_HANDLE_VALUE) // does not exist
    {
        ShowError(IDS_LOADERRORTEXT, name);
        return NULL;
    }
    ::FindClose(hFind);
 
    // is file empty?
    if (find.nFileSizeLow == 0 && find.nFileSizeHigh == 0)
    {
        if (fIsMainFile)
            return InitializeImage(name, &find, TRUE);
    }
 
    // load the image
    CImageDx img;
    float xDpi = 0, yDpi = 0;
    HRESULT hr = img.LoadDx(name, &xDpi, &yDpi);
    if (FAILED(hr))
    {
        ShowError(IDS_LOADERRORTEXT, name);
        return NULL;
    }
 
    HBITMAP hBitmap = img.Detach();
    if (!fIsMainFile)
        return hBitmap;
 
    if (xDpi <= 0 || yDpi <= 0)
    {
        HDC hDC = ::GetDC(NULL);
        xDpi = ::GetDeviceCaps(hDC, LOGPIXELSX);
        yDpi = ::GetDeviceCaps(hDC, LOGPIXELSY);
        ::ReleaseDC(NULL, hDC);
    }
 
    g_xDpi = xDpi;
    g_yDpi = yDpi;
 
    SetBitmapAndInfo(hBitmap, name, &find, TRUE);
    return hBitmap;
}

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

GetDIBHeight()

int GetDIBHeight

(

HBITMAP

hBitmap

)

Definition at line 144 of file dib.cpp.

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

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

GetDIBWidth()

int GetDIBWidth

(

HBITMAP

hBitmap

)

Definition at line 136 of file dib.cpp.

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

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

InitializeImage()

HBITMAP InitializeImage	(	LPCWSTR	name,
		LPWIN32_FIND_DATAW	pFound,
		BOOL	isFile
	)

Definition at line 226 of file dib.cpp.

{
    COLORREF white = RGB(255, 255, 255);
    HBITMAP hBitmap = CreateColorDIB(registrySettings.BMPWidth, registrySettings.BMPHeight, white);
    if (hBitmap == NULL)
        return NULL;
 
    HDC hScreenDC = ::GetDC(NULL);
    g_xDpi = ::GetDeviceCaps(hScreenDC, LOGPIXELSX);
    g_yDpi = ::GetDeviceCaps(hScreenDC, LOGPIXELSY);
    ::ReleaseDC(NULL, hScreenDC);
 
    return SetBitmapAndInfo(hBitmap, name, pFound, isFile);
}

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

IsBitmapBlackAndWhite()

BOOL IsBitmapBlackAndWhite

(

HBITMAP

hbm

)

Definition at line 537 of file dib.cpp.

{
    CWaitCursor waitCursor;
 
    BITMAP bm;
    if (!::GetObjectW(hbm, sizeof(bm), &bm))
        return FALSE;
 
    if (bm.bmBitsPixel == 1)
        return TRUE;
 
    BITMAPINFOEX bmi;
    ZeroMemory(&bmi, sizeof(bmi));
    bmi.bmiHeader.biSize = sizeof(bmi.bmiHeader);
    bmi.bmiHeader.biWidth = bm.bmWidth;
    bmi.bmiHeader.biHeight = bm.bmHeight;
    bmi.bmiHeader.biPlanes = 1;
    bmi.bmiHeader.biBitCount = 24;
 
    DWORD widthbytes = WIDTHBYTES(24 * bm.bmWidth);
    DWORD cbBits = widthbytes * bm.bmHeight;
    LPBYTE pbBits = new BYTE[cbBits];
 
    HDC hdc = ::CreateCompatibleDC(NULL);
    ::GetDIBits(hdc, hbm, 0, bm.bmHeight, pbBits, &bmi, DIB_RGB_COLORS);
    ::DeleteDC(hdc);
 
    BOOL bBlackAndWhite = TRUE;
    for (LONG y = 0; y < bm.bmHeight; ++y)
    {
        LPBYTE pbLine = &pbBits[widthbytes * y];
        for (LONG x = 0; x < bm.bmWidth; ++x)
        {
            BYTE Blue = *pbLine++;
            BYTE Green = *pbLine++;
            BYTE Red = *pbLine++;
            COLORREF rgbColor = RGB(Red, Green, Blue);
            if (rgbColor != RGB(0, 0, 0) && rgbColor != RGB(255, 255, 255))
            {
                bBlackAndWhite = FALSE;
                goto Finish;
            }
        }
    }
 
Finish:
    delete[] pbBits;
 
    return bBlackAndWhite;
}

Referenced by ImageModel::IsBlackAndWhite().

PpcmFromDpi()

float PpcmFromDpi

(

float

dpi

)

Definition at line 25 of file dib.cpp.

{
    // 1 DPI is 0.0254 meter. 1 centimeter is 1/100 meter.
    return dpi / (0.0254f * 100.0f);
}

Referenced by CAttributesDialog::OnEdit1(), CAttributesDialog::OnEdit2(), CAttributesDialog::OnInitDialog(), and CAttributesDialog::OnRadioButton2().

Rotate90DegreeBlt()

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

Definition at line 302 of file dib.cpp.

{
    HBITMAP hbm2;
    if (bMono)
        hbm2 = ::CreateBitmap(cy, cx, 1, 1, NULL);
    else
        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,
		LPCWSTR	FileName,
		BOOL	fIsMainFile,
		REFGUID	guidFileType
	)

Definition at line 151 of file dib.cpp.

{
    CWaitCursor waitCursor;
 
    CImageDx img;
    img.Attach(hBitmap);
    HRESULT hr = img.SaveDx(FileName, guidFileType, g_xDpi, g_yDpi);
    img.Detach();
 
    if (FAILED(hr))
    {
        ShowError(IDS_SAVEERROR, FileName);
        return FALSE;
    }
 
    if (!fIsMainFile)
        return TRUE;
 
    WIN32_FIND_DATAW find;
    HANDLE hFind = ::FindFirstFileW(FileName, &find);
    if (hFind == INVALID_HANDLE_VALUE)
    {
        ShowError(IDS_SAVEERROR, FileName);
        return FALSE;
    }
    ::FindClose(hFind);
 
    SetFileInfo(FileName, &find, TRUE);
    g_imageSaved = TRUE;
    return TRUE;
}

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

SetBitmapAndInfo()

HBITMAP SetBitmapAndInfo	(	HBITMAP	hBitmap,
		LPCWSTR	name,
		LPWIN32_FIND_DATAW	pFound,
		BOOL	isFile
	)

Definition at line 241 of file dib.cpp.

{
    // update image
    imageModel.PushImageForUndo(hBitmap);
    imageModel.ClearHistory();
 
    SetFileInfo(name, pFound, isFile);
    g_imageSaved = TRUE;
    return hBitmap;
}

Referenced by DoLoadImageFile(), and InitializeImage().

SetFileInfo()

void SetFileInfo	(	LPCWSTR	name,
		LPWIN32_FIND_DATAW	pFound,
		BOOL	isAFile
	)

Definition at line 183 of file dib.cpp.

{
    // update file time and size
    if (pFound)
    {
        FILETIME ft;
        ::FileTimeToLocalFileTime(&pFound->ftLastWriteTime, &ft);
        ::FileTimeToSystemTime(&ft, &g_fileTime);
 
        g_fileSize = pFound->nFileSizeLow;
    }
    else
    {
        ZeroMemory(&g_fileTime, sizeof(g_fileTime));
        g_fileSize = 0;
    }
 
    // update g_szFileName
    if (name && name[0])
    {
        CStringW strName = name;
        ::GetFullPathNameW(strName, _countof(g_szFileName), g_szFileName, NULL);
        // The following code won't work correctly when (name == g_szFileName):
        //   ::GetFullPathNameW(name, _countof(g_szFileName), g_szFileName, NULL);
    }
    else
    {
        ::LoadStringW(g_hinstExe, IDS_DEFAULTFILENAME, g_szFileName, _countof(g_szFileName));
    }
 
    // set title
    CString strTitle;
    strTitle.Format(IDS_WINDOWTITLE, PathFindFileName(g_szFileName));
    mainWindow.SetWindowText(strTitle);
 
    // update file info and recent
    g_isAFile = isAFile;
    if (g_isAFile)
        registrySettings.SetMostRecentFile(g_szFileName);
 
    g_imageSaved = TRUE;
}

Referenced by SaveDIBToFile(), and SetBitmapAndInfo().

SkewDIB()

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

Definition at line 341 of file dib.cpp.

{
    CWaitCursor waitCursor;
 
    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;
    if (bMono)
        hbmNew = CreateMonoBitmap(cx + dx, cy + dy, FALSE);
    else
        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 SelectionModel::StretchSkew(), and ImageModel::StretchSkew().

Variable Documentation

g_fileSize

INT g_fileSize = 0

Definition at line 10 of file dib.cpp.

Referenced by CAttributesDialog::OnInitDialog(), CMainWindow::ProcessFileMenu(), and SetFileInfo().

g_fileTime

SYSTEMTIME g_fileTime

Definition at line 13 of file dib.cpp.

Referenced by CAttributesDialog::OnInitDialog(), and SetFileInfo().

g_xDpi

float g_xDpi = 96

Definition at line 11 of file dib.cpp.

Referenced by DoLoadImageFile(), InitializeImage(), CAttributesDialog::OnEdit1(), CAttributesDialog::OnInitDialog(), CAttributesDialog::OnRadioButton1(), CAttributesDialog::OnRadioButton2(), and SaveDIBToFile().

g_yDpi

float g_yDpi = 96

Definition at line 12 of file dib.cpp.

Referenced by DoLoadImageFile(), InitializeImage(), CAttributesDialog::OnEdit2(), CAttributesDialog::OnInitDialog(), CAttributesDialog::OnRadioButton1(), CAttributesDialog::OnRadioButton2(), and SaveDIBToFile().