MaskBlt function almost working

[Lonnie Cumberland]

Hello All,

I have come across a function called MaskBlt which I have tried to
implement in the grphics/bitblt.c

The functions works, but still has a few problems and was wondering
if someone had any experience with this function so that I can try to
see how to fix it.

--------------------------------------------------------------
#define    FORE_ROP3(ROP4)        (0x00FFFFFF&(ROP4))
//#define    BACK_ROP3(ROP4)        (ROP3FromIndex(SwapROP3_SrcDst
(((ROP4)>>24))))
#define    BACK_ROP3(ROP4)        (ROP3FromIndex(SwapROP3_SrcDst
((ROP4)>>24)))

//
//    See the Raster operations in MSDN
//
DWORD ROP3FromIndex(DWORD dwIndex)
{
    static DWORD ROP3Table[256] =
    {
        0x00000042, 0x00010289,
        0x00020C89, 0x000300AA,
        0x00040C88, 0x000500A9,
        0x00060865, 0x000702C5,
        0x00080F08, 0x00090245,
        0x000A0329, 0x000B0B2A,
        0x000C0324, 0x000D0B25,
        0x000E08A5, 0x000F0001,
        0x00100C85, 0x001100A6,
        0x00120868, 0x001302C8,
        0x00140869, 0x001502C9,
        0x00165CCA, 0x00171D54,
        0x00180D59, 0x00191CC8,
        0x001A06C5, 0x001B0768,
        0x001C06CA, 0x001D0766,
        0x001E01A5, 0x001F0385,
        0x00200F09, 0x00210248,
        0x00220326, 0x00230B24,
        0x00240D55, 0x00251CC5,
        0x002606C8, 0x00271868,
        0x00280369, 0x002916CA,
        0x002A0CC9, 0x002B1D58,
        0x002C0784, 0x002D060A,
        0x002E064A, 0x002F0E2A,
        0x0030032A, 0x00310B28,
        0x00320688, 0x00330008,
        0x003406C4, 0x00351864,
        0x003601A8, 0x00370388,
        0x0038078A, 0x00390604,
        0x003A0644, 0x003B0E24,
        0x003C004A, 0x003D18A4,
        0x003E1B24, 0x003F00EA,
        0x00400F0A, 0x00410249,
        0x00420D5D, 0x00431CC4,
        0x00440328, 0x00450B29,
        0x004606C6, 0x0047076A,
        0x00480368, 0x004916C5,
        0x004A0789, 0x004B0605,
        0x004C0CC8, 0x004D1954,
        0x004E0645, 0x004F0E25,
        0x00500325, 0x00510B26,
        0x005206C9, 0x00530764,
        0x005408A9, 0x00550009,
        0x005601A9, 0x00570389,
        0x00580785, 0x00590609,
        0x005A0049, 0x005B18A9,
        0x005C0649, 0x005D0E29,
        0x005E1B29, 0x005F00E9,
        0x00600365, 0x006116C6,
        0x00620786, 0x00630608,
        0x00640788, 0x00650606,
        0x00660046, 0x006718A8,
        0x006858A6, 0x00690145,
        0x006A01E9, 0x006B178A,
        0x006C01E8, 0x006D1785,
        0x006E1E28, 0x006F0C65,
        0x00700CC5, 0x00711D5C,
        0x00720648, 0x00730E28,
        0x00740646, 0x00750E26,
        0x00761B28, 0x007700E6,
        0x007801E5, 0x00791786,
        0x007A1E29, 0x007B0C68,
        0x007C1E24, 0x007D0C69,
        0x007E0955, 0x007F03C9,
        0x008003E9, 0x00810975,
        0x00820C49, 0x00831E04,
        0x00840C48, 0x00851E05,
        0x008617A6, 0x008701C5,
        0x008800C6, 0x00891B08,
        0x008A0E06, 0x008B0666,
        0x008C0E08, 0x008D0668,
        0x008E1D7C, 0x008F0CE5,
        0x00900C45, 0x00911E08,
        0x009217A9, 0x009301C4,
        0x009417AA, 0x009501C9,
        0x00960169, 0x0097588A,
        0x00981888, 0x00990066,
        0x009A0709, 0x009B07A8,
        0x009C0704, 0x009D07A6,
        0x009E16E6, 0x009F0345,
        0x00A000C9, 0x00A11B05,
        0x00A20E09, 0x00A30669,
        0x00A41885, 0x00A50065,
        0x00A60706, 0x00A707A5,
        0x00A803A9, 0x00A90189,
        0x00AA0029, 0x00AB0889,
        0x00AC0744, 0x00AD06E9,
        0x00AE0B06, 0x00AF0229,
        0x00B00E05, 0x00B10665,
        0x00B21974, 0x00B30CE8,
        0x00B4070A, 0x00B507A9,
        0x00B616E9, 0x00B70348,
        0x00B8074A, 0x00B906E6,
        0x00BA0B09, 0x00BB0226,
        0x00BC1CE4, 0x00BD0D7D,
        0x00BE0269, 0x00BF08C9,
        0x00C000CA, 0x00C11B04,
        0x00C21884, 0x00C3006A,
        0x00C40E04, 0x00C50664,
        0x00C60708, 0x00C707AA,
        0x00C803A8, 0x00C90184,
        0x00CA0749, 0x00CB06E4,
        0x00CC0020, 0x00CD0888,
        0x00CE0B08, 0x00CF0224,
        0x00D00E0A, 0x00D1066A,
        0x00D20705, 0x00D307A4,
        0x00D41D78, 0x00D50CE9,
        0x00D616EA, 0x00D70349,
        0x00D80745, 0x00D906E8,
        0x00DA1CE9, 0x00DB0D75,
        0x00DC0B04, 0x00DD0228,
        0x00DE0268, 0x00DF08C8,
        0x00E003A5, 0x00E10185,
        0x00E20746, 0x00E306EA,
        0x00E40748, 0x00E506E5,
        0x00E61CE8, 0x00E70D79,
        0x00E81D74, 0x00E95CE6,
        0x00EA02E9, 0x00EB0849,
        0x00EC02E8, 0x00ED0848,
        0x00EE0086, 0x00EF0A08,
        0x00F00021, 0x00F10885,
        0x00F20B05, 0x00F3022A,
        0x00F40B0A, 0x00F50225,
        0x00F60265, 0x00F708C5,
        0x00F802E5, 0x00F90845,
        0x00FA0089, 0x00FB0A09,
        0x00FC008A, 0x00FD0A0A,
        0x00FE02A9, 0x00FF0062,
    };

return ROP3Table[dwIndex&0xFF];
}

BYTE SwapROP3_SrcDst(BYTE bRop3)
{
    // swap 1,2 bit and 5,6 bit
    typedef struct
    {
        unsigned bit0 : 1;
        unsigned bit1 : 1;
        unsigned bit2 : 1;
        unsigned bit3 : 1;

unsigned bit4 : 1;
        unsigned bit5 : 1;
        unsigned bit6 : 1;
        unsigned bit7 : 1;
    } BITS;
    DWORD dwRop3 = bRop3;
    BITS bits = *(BITS*)&dwRop3;

unsigned t = bits.bit1;
    bits.bit1 = bits.bit2;
    bits.bit2 = t;

t = bits.bit5;
    bits.bit5 = bits.bit6;
    bits.bit6 = t;

return *(BYTE*)&bits;
}

/*********************************************************************
**
 *           MaskBlt [GDI32.@]
 */
//BOOL WINAPI MaskBlt(HDC hdcDest, INT nXDest, INT nYDest,
//                        INT nWidth, INT nHeight, HDC hdcSource,
//			INT nXSrc, INT nYSrc, HBITMAP hbmMask,
//			INT xMask, INT yMask, DWORD dwRop)

//    FIXME("(%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%ld): stub\n",
//
hdcDest,nXDest,nYDest,nWidth,nHeight,hdcSource,nXSrc,nYSrc,
//             hbmMask,xMask,yMask,dwRop);

BOOL WINAPI MaskBlt(HDC hdcDest, int nXDest, int nYDest, int nWidth,
int nHeight,
    HDC hdcSrc, int nXSrc, int nYSrc,
    HBITMAP hbmMask, int xMask, int yMask,
    DWORD dwRop
)
{
    HDC hDCMask;
    HBITMAP hOldMaskBitmap;
    HDC hDC1;
    	HBITMAP hBitmap2;
    HBITMAP hOldBitmap2;
    HDC hDC2;
    HBITMAP hBitmap3;
    HBITMAP hOldBitmap3;
    DWORD dwRop3;

if ( hbmMask == NULL )
        return BitBlt(hdcDest, nXDest, nYDest, nWidth, nHeight,
hdcSrc,
                      nXSrc, nYSrc, FORE_ROP3(dwRop));

// 1. make mask bitmap's dc
    hDCMask = CreateCompatibleDC(hdcDest);
    hOldMaskBitmap = (HBITMAP)SelectObject(hDCMask, hbmMask);
    ASSERT ( hOldMaskBitmap );

// 2. make masked dest bitmap

// 2.1 make bitmap
    hDC1 = CreateCompatibleDC(hdcDest);
    ASSERT ( hDC1 );
    hBitmap2 = CreateCompatibleBitmap(hdcDest, nWidth, nHeight);
    hOldBitmap2 = (HBITMAP)SelectObject(hDC1, hBitmap2);
    ASSERT ( hOldBitmap2 );

// 2.2 draw dest bitmap and mask
//    BitBlt(hDC1, 0, 0, nWidth, nHeight, hdcDest, nXDest, nYDest,
FORE_ROP3(dwRop));
//    BitBlt(hDC1, 0, 0, nWidth, nHeight, hDCMask, xMask, yMask,
DSTERASE);

// 3. make masked src bitmap

// 3.1 make bitmap
    hDC2 = CreateCompatibleDC(hdcSrc);
    ASSERT ( hDC2 );
    hBitmap3 = CreateCompatibleBitmap(hdcSrc, nWidth, nHeight);
    hOldBitmap3 = (HBITMAP)SelectObject(hDC2, hBitmap3);
    ASSERT ( hOldBitmap3 );

// 3.2 draw src bitmap and mask
//    dwRop3 = BACK_ROP3(dwRop);
    dwRop3 = ROP3FromIndex(SwapROP3_SrcDst(((dwRop)>>24)));

BitBlt(hDC2, 0, 0, nWidth, nHeight, hdcSrc, nXSrc, nYSrc, dwRop3);
    BitBlt(hDC2, 0, 0, nWidth, nHeight, hDCMask, xMask, yMask,
SRCAND);

// 4. combine two bitmap and copy it to hdcDest
    BitBlt(hDC1, 0, 0, nWidth, nHeight, hDC2, 0, 0, SRCPAINT);
    BitBlt(hdcDest, nXDest, nYDest, nWidth, nHeight, hDC1, 0, 0,
SRCCOPY);

// 5. restore all object
    SelectObject(hDCMask, hOldMaskBitmap);
    SelectObject(hDC1, hOldBitmap2);
    SelectObject(hDC2, hOldBitmap3);

// 6. delete all temp object
    DeleteObject(hBitmap2);
    DeleteObject(hBitmap3);

DeleteDC(hDC1);
    DeleteDC(hDC2);
    DeleteDC(hDCMask);

return TRUE;
//    return 1;
}
----------------------------------------------------------------

When I test this with my example code, it appears to change the other
images as well even though I have not done anything with them.

any ideas?

By the way, I found this function at:

http://www.codeproject.com/bitmap/maskblt.asp

and modified it to work with wine.

cheers,
Lonnie

[Dimitrie O. Paun]

On April 2, 2002 12:48 pm, Lonnie Cumberland wrote:
> Hello All,

[...]
> By the way, I found this function at:
>
> http://www.codeproject.com/bitmap/maskblt.asp
>
> and modified it to work with wine.

What about the license? Is it LGPL compatible?

[Lonnie Cumberland]

I think that it is free to use, but I am looking into it now and am
contacting the author as we speak.

Cheers,
Lonnie
> On April 2, 2002 12:48 pm, Lonnie Cumberland wrote:
> > Hello All,
>
> [...]
> > By the way, I found this function at:
> >
> > http://www.codeproject.com/bitmap/maskblt.asp
> >
> > and modified it to work with wine.
>
> What about the license? Is it LGPL compatible?
>
> --
> Dimi.

[Tels]

-----BEGIN PGP SIGNED MESSAGE-----

Moin,

On 02-Apr-02 Dimitrie O. Paun carved into stone:
> On April 2, 2002 12:48 pm, Lonnie Cumberland wrote:
> > Hello All,
>
> [...]
> > By the way, I found this function at:
> >
> > http://www.codeproject.com/bitmap/maskblt.asp
> >
> > and modified it to work with wine.
>
> What about the license? Is it LGPL compatible?

I have searched the entire site and I couldn't find a single bit about the
licence that submitted (or otherwise available code at that site) falls
under. It is heavy MS-centric, so I guess it is not very /L?GPL/ friendly.

Best bet would probably be to send them an email and ask ;)

Cheers,

Tels

- --
 "Why do you go so slowly? Do you think this is some kind of game?"
 PGP key available on http://bloodgate.com/tels.asc or via email.
 perl -MDev::Bollocks -e'print Dev::Bollocks->rand(),"\n"'
 conveniently pursue killer functionalities
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