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StretchDIBits

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Join Date: Jun 2005

Posts: 6

Reputation: maldini is an unknown quantity at this point

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maldini

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Newbie Poster

StretchDIBits

Jun 8th, 2005

Hi,

I am having problems with the StretchDIBits function. The w->length contains the size of the jpeg. And the w->p contains a pointer to the begining of the jpeg data. Nothing displays onto the screen just a white box. Any Help would be really appriciated.

 Help with Code Tags 
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HDC dc = BeginPaint( hwnd, &ps );
 
BITMAPINFO bmi;
memset(&bmi, 0, sizeof(bmi));
bmi.bmiHeader.biSize        =    sizeof(BITMAPINFOHEADER);
bmi.bmiHeader.biWidth       = 320;
bmi.bmiHeader.biHeight      = -240; // top-down image
bmi.bmiHeader.biPlanes      = 1;
bmi.bmiHeader.biBitCount    = 0;
bmi.bmiHeader.biCompression = BI_JPEG;
bmi.bmiHeader.biSizeImage   = w->length;
 
int ww = StretchDIBits(dc, 0, 0, 32, 32, 0, 0, 32, 32, w->p, &bmi, DIB_RGB_COLORS, SRCCOPY);
 
EndPaint( hwnd, &ps );
HDC dc = BeginPaint( hwnd, &ps );

BITMAPINFO bmi;
memset(&bmi, 0, sizeof(bmi));
bmi.bmiHeader.biSize        =    sizeof(BITMAPINFOHEADER);
bmi.bmiHeader.biWidth       = 320;
bmi.bmiHeader.biHeight      = -240; // top-down image
bmi.bmiHeader.biPlanes      = 1;
bmi.bmiHeader.biBitCount    = 0;
bmi.bmiHeader.biCompression = BI_JPEG;
bmi.bmiHeader.biSizeImage   = w->length;

int ww = StretchDIBits(dc, 0, 0, 32, 32, 0, 0, 32, 32, w->p, &bmi, DIB_RGB_COLORS, SRCCOPY);

EndPaint( hwnd, &ps );