Drawing AA Text to a DIBitmap

So, the idea is I'm trying to draw anti-aliased text to a DIB so that I can bitcopy that onto a texture for use as a bitmap-font.

Here is some code:

Code:

---

        // create a GDI font
        HFONT fontHandle = CreateFontA (
                size,                                        // height
                0,                                        // width
                0,                                        // escapement
                0,                                        // orientation
                FW_NORMAL,                                // weight
                FALSE,                                        // italic
                FALSE,                                        // underline
                FALSE,                                        // strikeout
                ANSI_CHARSET,                                // char set
                OUT_OUTLINE_PRECIS,                        // out precision
                CLIP_DEFAULT_PRECIS,                        // clip precision
                ANTIALIASED_QUALITY,                        // quality
                VARIABLE_PITCH || FF_DONTCARE,                // pitch and family
                data_->face.CString ());                // face name

        HDC deviceContext = CreateCompatibleDC (NULL);
        if (!deviceContext)
                assert (0);

        // create a bitmap to render individual glyphs to
        BITMAPINFO bitmapInfo;
        memset (&bitmapInfo, 0, sizeof (bitmapInfo));
        bitmapInfo.bmiHeader.biSize = sizeof (BITMAPINFOHEADER);
        bitmapInfo.bmiHeader.biWidth = glyphSize;
        // negative height to store bitmatp data in raster scan order
        bitmapInfo.bmiHeader.biHeight = -glyphSize;
        bitmapInfo.bmiHeader.biPlanes = 1;
        bitmapInfo.bmiHeader.biBitCount = 32;

        void* bitmapMemoryBase;
        HBITMAP bitmap = CreateDIBSection (NULL, &bitmapInfo, DIB_RGB_COLORS, &bitmapMemoryBase, NULL, NULL);
        if (!bitmap)
                assert (0);

        // select in objects & setup for rendering
        SelectObject (deviceContext, fontHandle);
        SelectObject (deviceContext, bitmap);
        SetTextColor (deviceContext, RGB (255, 255, 255));
        SetBkColor (deviceContext, RGB (0, 0, 0));
        SetBkMode (deviceContext, OPAQUE);


(some time later)
        if (DrawTextA (deviceContext, (LPCSTR)stringBuf.CString (), 1, &rect, DT_LEFT | DT_SINGLELINE | DT_NOCLIP) == 0)
                        assert (0);

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Using this method the text comes out without anti-aliasing.

I found that I can get AA to work if I use the "SCREEN" dc and a DDB instead of a DIB but that renders visibly to the screen...

Any ideas?

My guess would be that you somehow lose the alpha-channel information for your DIB section. In most cases GDI functions can only process the RGB data, when anti-aliasing deals with RGBA or ARGB (meaning that there's also a byte for an alpha channel). Since your code sample above doesn't show how you deal with bitmapMemoryBase my guess would be that...