fbpoint.c revision 1b5d61b8 
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, int xoff, int yoff, FbBits and, FbBits xor);
37
38static void
39fbDots(FbBits * dstOrig,
40       FbStride dstStride,
41       int dstBpp,
42       BoxPtr pBox,
43       xPoint * pts,
44       int npt,
45       int xorg, int yorg, int xoff, int yoff, FbBits andOrig, FbBits xorOrig)
46{
47    FbStip *dst = (FbStip *) dstOrig;
48    int x1, y1, x2, y2;
49    int x, y;
50    FbStip *d;
51    FbStip and = andOrig;
52    FbStip xor = xorOrig;
53
54    dstStride = FbBitsStrideToStipStride(dstStride);
55    x1 = pBox->x1;
56    y1 = pBox->y1;
57    x2 = pBox->x2;
58    y2 = pBox->y2;
59    while (npt--) {
60        x = pts->x + xorg;
61        y = pts->y + yorg;
62        pts++;
63        if (x1 <= x && x < x2 && y1 <= y && y < y2) {
64            FbStip mask;
65            x = (x + xoff) * dstBpp;
66            d = dst + ((y + yoff) * dstStride) + (x >> FB_STIP_SHIFT);
67            x &= FB_STIP_MASK;
68
69            mask = FbStipMask(x, dstBpp);
70            WRITE(d, FbDoMaskRRop(READ(d), and, xor, mask));
71        }
72    }
73}
74
75void
76fbPolyPoint(DrawablePtr pDrawable,
77            GCPtr pGC, int mode, int nptInit, xPoint * pptInit)
78{
79    FbGCPrivPtr pPriv = fbGetGCPrivate(pGC);
80    RegionPtr pClip = fbGetCompositeClip(pGC);
81    FbBits *dst;
82    FbStride dstStride;
83    int dstBpp;
84    int dstXoff, dstYoff;
85    FbDots dots;
86    FbBits and, xor;
87    xPoint *ppt;
88    int npt;
89    BoxPtr pBox;
90    int nBox;
91
92    /* make pointlist origin relative */
93    ppt = pptInit;
94    npt = nptInit;
95    if (mode == CoordModePrevious) {
96        npt--;
97        while (npt--) {
98            ppt++;
99            ppt->x += (ppt - 1)->x;
100            ppt->y += (ppt - 1)->y;
101        }
102    }
103    fbGetDrawable(pDrawable, dst, dstStride, dstBpp, dstXoff, dstYoff);
104    and = pPriv->and;
105    xor = pPriv->xor;
106    dots = fbDots;
107    switch (dstBpp) {
108    case 8:
109        dots = fbDots8;
110        break;
111    case 16:
112        dots = fbDots16;
113        break;
114    case 32:
115        dots = fbDots32;
116        break;
117    }
118    for (nBox = RegionNumRects(pClip), pBox = RegionRects(pClip);
119         nBox--; pBox++)
120        (*dots) (dst, dstStride, dstBpp, pBox, pptInit, nptInit,
121                 pDrawable->x, pDrawable->y, dstXoff, dstYoff, and, xor);
122    fbFinishAccess(pDrawable);
123}
124