fbpoint.c revision 706f2543 
1/*
2 * Copyright © 1998 Keith Packard
3 *
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that
7 * copyright notice and this permission notice appear in supporting
8 * documentation, and that the name of Keith Packard not be used in
9 * advertising or publicity pertaining to distribution of the software without
10 * specific, written prior permission.  Keith Packard makes no
11 * representations about the suitability of this software for any purpose.  It
12 * is provided "as is" without express or implied warranty.
13 *
14 * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16 * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
20 * PERFORMANCE OF THIS SOFTWARE.
21 */
22
23#ifdef HAVE_DIX_CONFIG_H
24#include <dix-config.h>
25#endif
26
27#include "fb.h"
28
29typedef void	(*FbDots)  (FbBits	*dst,
30			    FbStride    dstStride,
31			    int		dstBpp,
32			    BoxPtr	pBox,
33			    xPoint	*pts,
34			    int		npt,
35			    int		xorg,
36			    int		yorg,
37			    int		xoff,
38			    int		yoff,
39			    FbBits	and,
40			    FbBits	xor);
41
42void
43fbDots (FbBits	    *dstOrig,
44	FbStride    dstStride,
45	int	    dstBpp,
46	BoxPtr	    pBox,
47	xPoint	    *pts,
48	int	    npt,
49	int	    xorg,
50	int	    yorg,
51	int	    xoff,
52	int	    yoff,
53	FbBits	    andOrig,
54	FbBits	    xorOrig)
55{
56    FbStip	*dst = (FbStip *) dstOrig;
57    int		x1, y1, x2, y2;
58    int		x, y;
59    FbStip	*d;
60    FbStip	and = andOrig;
61    FbStip	xor = xorOrig;
62
63    dstStride = FbBitsStrideToStipStride (dstStride);
64    x1 = pBox->x1;
65    y1 = pBox->y1;
66    x2 = pBox->x2;
67    y2 = pBox->y2;
68    while (npt--)
69    {
70	x = pts->x + xorg;
71	y = pts->y + yorg;
72	pts++;
73	if (x1 <= x && x < x2 && y1 <= y && y < y2)
74	{
75	    x = (x + xoff) * dstBpp;
76	    d = dst + ((y + yoff) * dstStride) + (x >> FB_STIP_SHIFT);
77	    x &= FB_STIP_MASK;
78#ifdef FB_24BIT
79	    if (dstBpp == 24)
80	    {
81		FbStip	leftMask, rightMask;
82		int	n, rot;
83		FbStip	andT, xorT;
84
85		rot = FbFirst24Rot (x);
86		andT = FbRot24Stip(and,rot);
87		xorT = FbRot24Stip(xor,rot);
88		FbMaskStip (x, 24, leftMask, n, rightMask);
89		if (leftMask)
90		{
91		    WRITE(d, FbDoMaskRRop (READ(d), andT, xorT, leftMask));
92		    andT = FbNext24Stip(andT);
93		    xorT = FbNext24Stip(xorT);
94		    d++;
95		}
96		if (rightMask)
97		    WRITE(d, FbDoMaskRRop(READ(d), andT, xorT, rightMask));
98	    }
99	    else
100#endif
101	    {
102		FbStip	mask;
103		mask = FbStipMask(x, dstBpp);
104		WRITE(d, FbDoMaskRRop (READ(d), and, xor, mask));
105	    }
106	}
107    }
108}
109
110void
111fbPolyPoint (DrawablePtr    pDrawable,
112	     GCPtr	    pGC,
113	     int	    mode,
114	     int	    nptInit,
115	     xPoint	    *pptInit)
116{
117    FbGCPrivPtr pPriv = fbGetGCPrivate (pGC);
118    RegionPtr	pClip = fbGetCompositeClip(pGC);
119    FbBits	*dst;
120    FbStride	dstStride;
121    int		dstBpp;
122    int		dstXoff, dstYoff;
123    FbDots	dots;
124    FbBits	and, xor;
125    xPoint	*ppt;
126    int		npt;
127    BoxPtr	pBox;
128    int		nBox;
129
130    /* make pointlist origin relative */
131    ppt = pptInit;
132    npt = nptInit;
133    if (mode == CoordModePrevious)
134    {
135	npt--;
136	while(npt--)
137	{
138	    ppt++;
139	    ppt->x += (ppt-1)->x;
140	    ppt->y += (ppt-1)->y;
141	}
142    }
143    fbGetDrawable (pDrawable, dst, dstStride, dstBpp, dstXoff, dstYoff);
144    and = pPriv->and;
145    xor = pPriv->xor;
146    dots = fbDots;
147#ifndef FBNOPIXADDR
148    switch (dstBpp) {
149    case 8:	dots = fbDots8; break;
150    case 16:    dots = fbDots16; break;
151#ifdef FB_24BIT
152    case 24:    dots = fbDots24; break;
153#endif
154    case 32:    dots = fbDots32; break;
155    }
156#endif
157    for (nBox = RegionNumRects (pClip), pBox = RegionRects (pClip);
158	 nBox--; pBox++)
159	(*dots) (dst, dstStride, dstBpp, pBox, pptInit, nptInit,
160		 pDrawable->x, pDrawable->y, dstXoff, dstYoff, and, xor);
161    fbFinishAccess (pDrawable);
162}
163