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Free Codes with BITMAPINFO BITMAPINFOHEADER and CreateDIBSection

 
 

Code Snippet

 
Sample Codes with BITMAPINFO struct:
//prepare the bitmap attributes
BITMAPINFO bmInfo;
memset(&bmInfo.bmiHeader,0,sizeof(BITMAPINFOHEADER));
bmInfo.bmiHeader.biSize=sizeof(BITMAPINFOHEADER);
bmInfo.bmiHeader.biWidth=width;
bmInfo.bmiHeader.biHeight=height;
bmInfo.bmiHeader.biPlanes=1;
bmInfo.bmiHeader.biBitCount=24;
//create a temporary dc in memory.
HDC pDC = ::GetDC(0);
HDC TmpDC=CreateCompatibleDC(pDC);
//create a new bitmap and select it in the memory dc
BYTE *pbase;
HBITMAP TmpBmp=CreateDIBSection(pDC,
    &bmInfo,DIB_RGB_COLORS,(void**)&pbase,0,0);
HGDIOBJ TmpObj=SelectObject(TmpDC,TmpBmp);
 
Sample Codes for drawing text on bitmap:
//draw the background
HDC dcBmp=CreateCompatibleDC(TmpDC);
HGDIOBJ TmpObj2 = SelectObject(dcBmp,hbitmap);
BitBlt(TmpDC,0,0,width,height,dcBmp,0,0,SRCCOPY);
SelectObject(TmpDC,TmpObj2);
DeleteDC(dcBmp);

//choose the font
CFont m_Font;
LOGFONT* m_pLF;
m_pLF=(LOGFONT*)calloc(1,sizeof(LOGFONT));
strncpy(m_pLF->lfFaceName,"Times New Roman",31);
m_pLF->lfHeight=64;
m_pLF->lfWeight=600;
m_pLF->lfItalic=1;
m_pLF->lfUnderline=0;
m_Font.CreateFontIndirect(m_pLF);

//select the font in the dc
CDC dc;
dc.Attach(TmpDC);
CFont* pOldFont=NULL;
if (m_Font.m_hObject) 
    pOldFont = dc.SelectObject(&m_Font);
else 
    dc.SelectObject(GetStockObject(DEFAULT_GUI_FONT));

//Set text color
dc.SetTextColor(RGB(60,120,240));
//Set text position;
RECT pos = {40,40,0,0};
//draw the text
dc.SetBkMode(TRANSPARENT);
dc.DrawText("Test",4,&pos,DT_CALCRECT);
dc.DrawText("Test",4,&pos,0);

//cleanup 
if (pOldFont) dc.SelectObject(pOldFont);
m_Font.DeleteObject();
dc.Detach();
free(m_pLF);
 

 

 

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