paste a SetClipboardData(CF_DIB) image to powerpoint?

[ejbaker]

Hi
I have a VisualC++ program to display image data to the screen. The data is a 24-bit, RGB bitmap that is properly shown using BitBlt().

I have a CopyWindow() function that puts the BITMAPINFO structure and RGB image data on the clipboard as a DIB with the SetClipboardData(CF_DIB,...) call.

My problem happens when I try to paste the image into MS Powerpoint (Office 2010). I've tried Paste and all the options in Paste Special but the image will not appear.

If I open Paint and do a Paste, the image appears properly in that application. Then I can do a Copy from there and am able to Paste that into Powerpoint.

How is Paint able to accept the DIB?
And what is different about how Paste puts that bitmap onto the Clipboard so that Powerpoint can see it?

Thanks.

--Ed

[VictorN]

Could you show a piece of code?

[ejbaker]

Here is the code.
(Note that error checking is removed for brevity but I checked the return codes and they all succeed.)

// ---------------------------------------------
RGBTRIPLE *m_pUTDispData;
BITMAPINFO m_bmi;
CDC *pDC = this->GetDC();
void *m_pDIBData;

memset(&m_bmi, 0, sizeof(BITMAPINFO));
m_bmi.bmiHeader.biSize = sizeof(BITMAPINFO);
m_bmi.bmiHeader.biWidth = DATA_WIDTH; // width of data buffer in pixels
m_bmi.bmiHeader.biHeight = -DATA_LENGTH; // length of data buffer in pixels
m_bmi.bmiHeader.biPlanes = 1;
m_bmi.bmiHeader.biBitCount = 24;
m_bmi.bmiHeader.biCompression = BI_RGB;
m_bmi.bmiHeader.biSizeImage = 0; // can be 0 for BI_RGB bitmaps
m_bmi.bmiHeader.biXPelsPerMeter = 0;
m_bmi.bmiHeader.biYPelsPerMeter = 0;
m_bmi.bmiHeader.biClrImportant = 0; // all colors are required for display
m_bmi.bmiHeader.biClrUsed = 0;


m_hDisplayBitmap=CreateDIBSection(pDC->m_hDC, &m_bmi, DIB_RGB_COLORS, &m_pDIBData, NULL, 0);
m_pUTDispData = (RGBTRIPLE *)m_pDIBData;

// walk through m_pUTDispData DATA_WIDTH x DATA_LENGTH and fill it with RGB triplets.
// can be any color - a rainbow, doesn't matter - it successfully BitBlt()s to the screen


// ---------------------------------------------

// Later in the CopyWindow() routine... (note that m_pUTDispData and m_bmi are the
// same variables from above


HANDLE hData = GlobalAlloc(GHND | GMEM_SHARE,
sizeof(BITMAPINFO)+m_bmi.bmiHeader.biWidth*m_bmi.bmiHeader.biHeight*3);
LPVOID pData = (LPVOID)GlobalLock(hData);
memcpy(pData,&m_bmi,sizeof(BITMAPINFO));
memcpy((UCHAR *)pData+sizeof(BITMAPINFO), (LPVOID)m_pUTDispData,
m_bmi.bmiHeader.biWidth*m_bmi.bmiHeader.biHeight*3);
GlobalUnlock(hData);
OpenClipboard();
EmptyClipboard();
SetClipboardData(CF_DIB, hData);
CloseClipboard();

// ---------------------------------------------

[ejbaker]

ach... too much copy and paste. the "m_bmi.bmiHeader.biHeight = -DATA_LENGTH" line should NOT have the negative sign. my misbehaving code has that number as positive.

[2kaud]

ach... too much copy and paste. the "m_bmi.bmiHeader.biHeight = -DATA_LENGTH" line should NOT have the negative sign. my misbehaving code has that number as positive.

When posting code, format it first, click 'Go Adanced', paste the code and then select it and click '#' to have it displayed properly.