How do I create a bitmap using the BITMAPV5HEADER header?

Question

This is my current code, but it causes an error when casting to BITMAPINFOHEADER:

/* Create the bitmap */
BITMAPINFO bmpinfo;
ZeroMemory(&bmpinfo, sizeof(bmpinfo));
BITMAPV5HEADER bmpheader;
ZeroMemory(&bmpheader, sizeof(bmpheader));
bmpheader.bV5Size = sizeof(BITMAPV5HEADER);
bmpheader.bV5Width = width;
bmpheader.bV5Height = height;
bmpheader.bV5Planes = 1;
bmpheader.bV5BitCount = 32;
bmpheader.bV5Compression = BI_BITFIELDS;
bmpheader.bV5SizeImage = width*height*4;
bmpheader.bV5RedMask = 0x00FF0000;
bmpheader.bV5GreenMask = 0x0000FF00;
bmpheader.bV5BlueMask = 0x000000FF;
bmpheader.bV5AlphaMask = 0xFF000000;
bmpheader.bV5CSType = 0x57696e20; // LCS_WINDOWS_COLOR_SPACE
bmpheader.bV5Intent = LCS_GM_BUSINESS;
bmpinfo.bmiHeader = reinterpret_cast<BITMAPINFOHEADER>(bmpheader);
void* converted = NULL;
HDC screen = GetDC(NULL);
HBITMAP result = CreateDIBSection(screen, &bmpinfo, DIB_RGB_COLORS, &converted, NULL, 0);
ReleaseDC(NULL, screen);
// Image data filled here

How will I be able to do this successfully?

Mark Ransom · Accepted Answer · 2010-12-15 22:49:56Z

4

BITMAPINFO isn't a true structure, it's more just documentation about how the color map follows the header. Just pass your BITMAPV5HEADER directly to CreateDIBSection:

HBITMAP result = CreateDIBSection(screen, reinterpret_cast<BITMAPINFO *>(&bmpheader), DIB_RGB_COLORS, &converted, NULL, 0);

answered Dec 15, 2010 at 22:49

Mark Ransom

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1 Comment

phimuemue Over a year ago

@Mark Ransom: I found BITMAPV5HEADER and thought about just passing it to CreateDIBSection, assuming that it can infer the kind of structure by looking at bV5Size, but I could not find any documentation on it. Do you possibly have a link?

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