static BOOL HLPFILE_RtfAddTransparentBitmap	(	struct RtfData *	rd,
		const BITMAPINFO *	bi,
		const void *	pict,
		unsigned	nc
	)		`[static]`
Definition at line 867 of file hlpfile.c.
Referenced by HLPFILE_RtfAddBitmap().
{
    HDC                 hdc, hdcMask, hdcMem, hdcEMF;
    HBITMAP             hbm, hbmMask, hbmOldMask, hbmOldMem;
    HENHMETAFILE        hEMF;
    BOOL                ret = FALSE;
    void*               data;
    UINT                sz;

    hbm = CreateDIBitmap(hdc = GetDC(0), &bi->bmiHeader,
                         CBM_INIT, pict, bi, DIB_RGB_COLORS);

    hdcMem = CreateCompatibleDC(hdc);
    hbmOldMem = SelectObject(hdcMem, hbm);

    /* create the mask bitmap from the main bitmap */
    hdcMask = CreateCompatibleDC(hdc);
    hbmMask = CreateBitmap(bi->bmiHeader.biWidth, bi->bmiHeader.biHeight, 1, 1, NULL);
    hbmOldMask = SelectObject(hdcMask, hbmMask);
    SetBkColor(hdcMem,
               RGB(bi->bmiColors[nc - 1].rgbRed,
                   bi->bmiColors[nc - 1].rgbGreen,
                   bi->bmiColors[nc - 1].rgbBlue));
    BitBlt(hdcMask, 0, 0, bi->bmiHeader.biWidth, bi->bmiHeader.biHeight, hdcMem, 0, 0, SRCCOPY);

    /* sets to RGB(0,0,0) the transparent bits in main bitmap */
    SetBkColor(hdcMem, RGB(0,0,0));
    SetTextColor(hdcMem, RGB(255,255,255));
    BitBlt(hdcMem, 0, 0, bi->bmiHeader.biWidth, bi->bmiHeader.biHeight, hdcMask, 0, 0, SRCAND);

    SelectObject(hdcMask, hbmOldMask);
    DeleteDC(hdcMask);

    SelectObject(hdcMem, hbmOldMem);
    DeleteDC(hdcMem);

    /* we create the bitmap on the fly */
    hdcEMF = CreateEnhMetaFile(NULL, NULL, NULL, NULL);
    hdcMem = CreateCompatibleDC(hdcEMF);

    /* sets to RGB(0,0,0) the transparent bits in final bitmap */
    hbmOldMem = SelectObject(hdcMem, hbmMask);
    SetBkColor(hdcEMF, RGB(255, 255, 255));
    SetTextColor(hdcEMF, RGB(0, 0, 0));
    BitBlt(hdcEMF, 0, 0, bi->bmiHeader.biWidth, bi->bmiHeader.biHeight, hdcMem, 0, 0, SRCAND);

    /* and copy the remaining bits of main bitmap */
    SelectObject(hdcMem, hbm);
    BitBlt(hdcEMF, 0, 0, bi->bmiHeader.biWidth, bi->bmiHeader.biHeight, hdcMem, 0, 0, SRCPAINT);
    SelectObject(hdcMem, hbmOldMem);
    DeleteDC(hdcMem);

    /* do the cleanup */
    ReleaseDC(0, hdc);
    DeleteObject(hbmMask);
    DeleteObject(hbm);

    hEMF = CloseEnhMetaFile(hdcEMF);

    /* generate rtf stream */
    sz = GetEnhMetaFileBits(hEMF, 0, NULL);
    if (sz && (data = HeapAlloc(GetProcessHeap(), 0, sz)))
    {
        if (sz == GetEnhMetaFileBits(hEMF, sz, data))
        {
            ret = HLPFILE_RtfAddControl(rd, "{\\pict\\emfblip") &&
                HLPFILE_RtfAddHexBytes(rd, data, sz) &&
                HLPFILE_RtfAddControl(rd, "}");
        }
        HeapFree(GetProcessHeap(), 0, data);
    }
    DeleteEnhMetaFile(hEMF);

    return ret;
}
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