dib.cpp File Reference

#include "precomp.h"
#include <math.h>

Include dependency graph for dib.cpp:

Go to the source code of this file.

Macros
#define	M_PI   3.14159265

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

Variables
INT	fileSize = 0
float	g_xDpi = 96
float	g_yDpi = 96
SYSTEMTIME	fileTime

Macro Definition Documentation

M_PI

#define M_PI   3.14159265

Definition at line 259 of file dib.cpp.

Function Documentation

CreateColorDIB()

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

Definition at line 40 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 26 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 164 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
    CImageDx img;
    img.LoadDx(name, &g_xDpi, &g_yDpi);
 
    if (g_xDpi <= 0)
        g_xDpi = 96;
    if (g_yDpi <= 0)
        g_yDpi = 96;
 
    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

hBitmap

)

Definition at line 71 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

hBitmap

)

Definition at line 63 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().

PpmFromDpi()

float PpmFromDpi

(

float

dpi

)

Definition at line 20 of file dib.cpp.

{
    return dpi / 0.0254; // 1 DPI is 0.0254 meter.
}

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

Rotate90DegreeBlt()

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

Definition at line 223 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 78 of file dib.cpp.

{
    CImageDx img;
    img.Attach(hBitmap);
    img.SaveDx(FileName, GUID_NULL, g_xDpi, g_yDpi); // 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 118 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;
 
        HDC hScreenDC = GetDC(NULL);
        g_xDpi = GetDeviceCaps(hScreenDC, LOGPIXELSX);
        g_yDpi = GetDeviceCaps(hScreenDC, LOGPIXELSY);
        ReleaseDC(NULL, hScreenDC);
 
        ZeroMemory(&fileTime, sizeof(fileTime));
    }
 
    // 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 109 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 262 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().

Variable Documentation

fileSize

INT fileSize = 0

Definition at line 12 of file dib.cpp.

Referenced by ImageGetDigestStream(), IMAGEHLP_ReportCodeSections(), IMAGEHLP_ReportImportSection(), IMAGEHLP_ReportSection(), IMAGEHLP_ReportSectionFromOffset(), CAttributesDialog::OnInitDialog(), SaveDIBToFile(), SetBitmapAndInfo(), and SOFTPUB_GetFileSubject().

fileTime

SYSTEMTIME fileTime

Definition at line 15 of file dib.cpp.

Referenced by add_date_string_to_control(), CertVerifyCRLTimeValidity(), CertVerifyTimeValidity(), DoLoadImageFile(), format_long_date(), getChain(), CAttributesDialog::OnInitDialog(), SaveDIBToFile(), SetBitmapAndInfo(), SHFormatDateTimeA(), SHFormatDateTimeW(), test_CERT_CHAIN_PARA_cbSize(), test_verifyTimeValidity(), and testGetCertChain().

g_xDpi

float g_xDpi = 96

Definition at line 13 of file dib.cpp.

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

g_yDpi

float g_yDpi = 96

Definition at line 14 of file dib.cpp.

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