C / C++ / MFC

Mark Salsbery wrote:

A combination of these APIs should do everything you need:

led mike wrote:

well exclusive of providing the user with a decent experience

Mark Salsbery
Microsoft MVP - Visual C++

BITMAPINFO *pbmi = (BITMAPINFO*)new BYTE[sizeof(BITMAPINFO) + sizeof(RGBQUAD) * 255];

pbmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER); 
pbmi->bmiHeader.biWidth = 152; 
pbmi->bmiHeader.biHeight = 200; 
pbmi->bmiHeader.biPlanes = 1; 
pbmi->bmiHeader.biBitCount = 8; 
pbmi->bmiHeader.biCompression = BI_RGB; 
pbmi->bmiHeader.biSizeImage = 30400; 
pbmi->bmiHeader.biXPelsPerMeter = 0; 
pbmi->bmiHeader.biYPelsPerMeter = 0; 
pbmi->bmiHeader.biClrUsed = 0; 
pbmi->bmiHeader.biClrImportant = 0; 

for (int i = 0; i < 256; ++i)
{
   pbmi->bmiColors[i].rgbRed = <font color="Red">?</font>;
   pbmi->bmiColors[i].rgbGreen = <font color="Red">?</font>;
   pbmi->bmiColors[i].rgbBlue = <font color="Red">?</font>;
   pbmi->bmiColors[i].rgbReserved = 0;
}

<font color="Red">// You don't really need a DC for CreateDIBSection() unless
//   you're using the system palette.  Not a good idea for saving
//   a bitmap to a file in a device-independent fashion :)
// It's fine here - you could also pass NULL to CreateDIBSection, however.
</font>HDC hdc = ::GetDC(0);

BYTE *pDibBits;
HBITMAP hbitmap = ::CreateDIBSection(hdc, pbmi, DIB_RGB_COLORS, &pDibBits, NULL, 0);

<font color="Red">// Copy bits from t to the new DIBsection</font>
memcpy(pDibBits, t, 30400);

::ReleaseDC(0, hdc);
delete[] (BYTE*)pbmi;

... use the DIBsection ...

::DeleteObject(hbitmap);

Mark Salsbery
Microsoft MVP - Visual C++

class CGDIDoc : public CDocument
{
protected:
CBitmap m_bmpDraw;
……
HGLOBAL m_hDIB;
……
public:
CBitmap *GetBitmap(){return &m_bmpDraw;}
……
HGLOBAL GetHDib(){return m_hDIB;}
……
}

CGDIDoc::CGDIDoc()
{
m_hDIB=NULL;
}

CGDIDoc::~CGDIDoc()
{
if(m_hDIB != NULL)
{
::GlobalFree(m_hDIB);
m_hDIB=NULL;
}
}

void CGDIDoc::Serialize(CArchive& ar)
{
if(ar.IsStoring())
{}
else
{
BITMAPFILEHEADER bf;
DWORD dwSize;
LPSTR lpDIB;
if(m_hDIB != NULL)
{
::GlobalFree(m_hDIB);
m_hDIB=NULL;
}
……

……
if
(
ar.Read
(
(LPSTR)&bf,
sizeof(BITMAPFILEHEADER)
) != sizeof(BITMAPFILEHEADER)
)return;
……

……
if(bf.bfType != 'MB')return;
dwSize=bf.bfSize-sizeof(BITMAPFILEHEADER);
m_hDIB=::GlobalAlloc(GHND, dwSize);
ASSERT(m_hDIB);
lpDIB=(LPSTR)::GlobalLock(m_hDIB);
ASSERT(lpDIB);
……

……
if(ar.Read(lpDIB, dwSize) != dwSize)
{
::GlobalUnlock(m_hDIB);
::GlobalFree(m_hDIB);
m_hDIB=NULL;
}
else ::GlobalUnlock(m_hDIB);
}
}

Greetings.

--------
M.D.V.

If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?

Help me to understand what I'm saying, and I'll explain it better to you

Miguel Resto wrote:

do you know how to write the hbitmap object to a bmp file???

Mark Salsbery
Microsoft MVP - Visual C++

sarat12in wrote:

please let me know wether GDI+ works on win2k r no