1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
|
#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif
#include <stdlib.h>
#include <X11/X.h>
#include "misc.h"
#include "xf86.h"
#include "xf86_OSproc.h"
#include "scrnintstr.h"
#include "pixmapstr.h"
#include "miline.h"
#include "xf86str.h"
#include "xaa.h"
#include "xaalocal.h"
void
#ifdef POLYSEGMENT
XAAPolySegment(DrawablePtr pDrawable, GCPtr pGC, int nseg, xSegment * pSeg
#else
XAAPolyLines(DrawablePtr pDrawable, GCPtr pGC, int mode, /* Origin or Previous */
int npt, /* number of points */
DDXPointPtr pptInit
#endif
)
{
XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_GC(pGC);
BoxPtr pboxInit = RegionRects(pGC->pCompositeClip);
int nboxInit = RegionNumRects(pGC->pCompositeClip);
unsigned int bias = miGetZeroLineBias(pDrawable->pScreen);
int xorg = pDrawable->x;
int yorg = pDrawable->y;
int nbox;
BoxPtr pbox;
#ifndef POLYSEGMENT
DDXPointPtr ppt;
#endif
int x1, x2, y1, y2, tmp, len;
if (!nboxInit)
return;
if (infoRec->SolidLineFlags & LINE_LIMIT_COORDS) {
int minValX = infoRec->SolidLineLimits.x1;
int maxValX = infoRec->SolidLineLimits.x2;
int minValY = infoRec->SolidLineLimits.y1;
int maxValY = infoRec->SolidLineLimits.y2;
#ifdef POLYSEGMENT
int n = nseg;
xSegment *s = pSeg;
while (n--)
#else
int n = npt;
int xorgtmp = xorg;
int yorgtmp = yorg;
ppt = pptInit;
x2 = ppt->x + xorgtmp;
y2 = ppt->y + yorgtmp;
while (--n)
#endif
{
#ifdef POLYSEGMENT
x1 = s->x1 + xorg;
y1 = s->y1 + yorg;
x2 = s->x2 + xorg;
y2 = s->y2 + yorg;
s++;
#else
x1 = x2;
y1 = y2;
++ppt;
if (mode == CoordModePrevious) {
xorgtmp = x1;
yorgtmp = y1;
}
x2 = ppt->x + xorgtmp;
y2 = ppt->y + yorgtmp;
#endif
if (x1 > maxValX || x1 < minValX ||
x2 > maxValX || x2 < minValX ||
y1 > maxValY || y1 < minValY || y2 > maxValY || y2 < minValY) {
#ifdef POLYSEGMENT
XAAFallbackOps.PolySegment(pDrawable, pGC, nseg, pSeg);
#else
XAAFallbackOps.Polylines(pDrawable, pGC, mode, npt, pptInit);
#endif
return;
}
}
}
(*infoRec->SetupForSolidLine) (infoRec->pScrn, pGC->fgPixel,
pGC->alu, pGC->planemask);
#ifdef POLYSEGMENT
while (nseg--)
#else
ppt = pptInit;
x2 = ppt->x + xorg;
y2 = ppt->y + yorg;
while (--npt)
#endif
{
nbox = nboxInit;
pbox = pboxInit;
#ifdef POLYSEGMENT
x1 = pSeg->x1 + xorg;
y1 = pSeg->y1 + yorg;
x2 = pSeg->x2 + xorg;
y2 = pSeg->y2 + yorg;
pSeg++;
#else
x1 = x2;
y1 = y2;
++ppt;
if (mode == CoordModePrevious) {
xorg = x1;
yorg = y1;
}
x2 = ppt->x + xorg;
y2 = ppt->y + yorg;
#endif
if (x1 == x2) { /* vertical line */
/* make the line go top to bottom of screen, keeping
endpoint semantics
*/
if (y1 > y2) {
tmp = y2;
y2 = y1 + 1;
y1 = tmp + 1;
#ifdef POLYSEGMENT
if (pGC->capStyle != CapNotLast)
y1--;
#endif
}
#ifdef POLYSEGMENT
else if (pGC->capStyle != CapNotLast)
y2++;
#endif
/* get to first band that might contain part of line */
while (nbox && (pbox->y2 <= y1)) {
pbox++;
nbox--;
}
/* stop when lower edge of box is beyond end of line */
while (nbox && (y2 >= pbox->y1)) {
if ((x1 >= pbox->x1) && (x1 < pbox->x2)) {
tmp = max(y1, pbox->y1);
len = min(y2, pbox->y2) - tmp;
if (len)
(*infoRec->SubsequentSolidHorVertLine) (infoRec->pScrn,
x1, tmp, len,
DEGREES_270);
}
nbox--;
pbox++;
}
#ifndef POLYSEGMENT
y2 = ppt->y + yorg;
#endif
}
else if (y1 == y2) { /* horizontal line */
/* force line from left to right, keeping endpoint semantics */
if (x1 > x2) {
tmp = x2;
x2 = x1 + 1;
x1 = tmp + 1;
#ifdef POLYSEGMENT
if (pGC->capStyle != CapNotLast)
x1--;
#endif
}
#ifdef POLYSEGMENT
else if (pGC->capStyle != CapNotLast)
x2++;
#endif
/* find the correct band */
while (nbox && (pbox->y2 <= y1)) {
pbox++;
nbox--;
}
/* try to draw the line, if we haven't gone beyond it */
if (nbox && (pbox->y1 <= y1)) {
int orig_y = pbox->y1;
/* when we leave this band, we're done */
while (nbox && (orig_y == pbox->y1)) {
if (pbox->x2 <= x1) {
/* skip boxes until one might contain start point */
nbox--;
pbox++;
continue;
}
/* stop if left of box is beyond right of line */
if (pbox->x1 >= x2) {
nbox = 0;
break;
}
tmp = max(x1, pbox->x1);
len = min(x2, pbox->x2) - tmp;
if (len)
(*infoRec->SubsequentSolidHorVertLine) (infoRec->pScrn,
tmp, y1, len,
DEGREES_0);
nbox--;
pbox++;
}
}
#ifndef POLYSEGMENT
x2 = ppt->x + xorg;
#endif
}
else { /* sloped line */
unsigned int oc1, oc2;
int dmin, dmaj, e, octant;
if (infoRec->SubsequentSolidBresenhamLine) {
if ((dmaj = x2 - x1) < 0) {
dmaj = -dmaj;
octant = XDECREASING;
}
else
octant = 0;
if ((dmin = y2 - y1) < 0) {
dmin = -dmin;
octant |= YDECREASING;
}
if (dmin >= dmaj) {
tmp = dmin;
dmin = dmaj;
dmaj = tmp;
octant |= YMAJOR;
}
e = -dmaj - ((bias >> octant) & 1);
len = dmaj;
dmin <<= 1;
dmaj <<= 1;
}
else { /* Muffle compiler */
dmin = dmaj = e = octant = len = 0;
}
while (nbox--) {
oc1 = oc2 = 0;
OUTCODES(oc1, x1, y1, pbox);
OUTCODES(oc2, x2, y2, pbox);
if (!(oc1 | oc2)) { /* unclipped */
if (infoRec->SubsequentSolidTwoPointLine) {
(*infoRec->SubsequentSolidTwoPointLine) (infoRec->pScrn,
x1, y1, x2, y2,
#ifdef POLYSEGMENT
(pGC->
capStyle !=
CapNotLast) ?
0 :
#endif
OMIT_LAST);
}
else {
(*infoRec->SubsequentSolidBresenhamLine) (infoRec->
pScrn, x1, y1,
dmaj, dmin, e,
#ifdef POLYSEGMENT
(pGC->
capStyle !=
CapNotLast)
? (len + 1) :
#endif
len, octant);
}
break;
}
else if (oc1 & oc2) { /* completely clipped */
pbox++;
}
else if (infoRec->ClippingFlags & HARDWARE_CLIP_SOLID_LINE) {
(*infoRec->SetClippingRectangle) (infoRec->pScrn,
pbox->x1, pbox->y1,
pbox->x2 - 1,
pbox->y2 - 1);
if (infoRec->SubsequentSolidBresenhamLine) {
(*infoRec->SubsequentSolidBresenhamLine) (infoRec->
pScrn, x1, y1,
dmaj, dmin, e,
#ifdef POLYSEGMENT
(pGC->
capStyle !=
CapNotLast)
? (len + 1) :
#endif
len, octant);
}
else {
(*infoRec->SubsequentSolidTwoPointLine) (infoRec->pScrn,
x1, y1, x2, y2,
#ifdef POLYSEGMENT
(pGC->
capStyle !=
CapNotLast) ?
0 :
#endif
OMIT_LAST);
}
(*infoRec->DisableClipping) (infoRec->pScrn);
pbox++;
}
else {
int new_x1 = x1, new_y1 = y1, new_x2 = x2, new_y2 = y2;
int clip1 = 0, clip2 = 0;
int err, adx, ady;
if (octant & YMAJOR) {
ady = dmaj >> 1;
adx = dmin >> 1;
}
else {
ady = dmin >> 1;
adx = dmaj >> 1;
}
if (miZeroClipLine(pbox->x1, pbox->y1,
pbox->x2 - 1, pbox->y2 - 1,
&new_x1, &new_y1, &new_x2, &new_y2,
adx, ady, &clip1, &clip2,
octant, bias, oc1, oc2) == -1) {
pbox++;
continue;
}
if (octant & YMAJOR)
len = abs(new_y2 - new_y1);
else
len = abs(new_x2 - new_x1);
#ifdef POLYSEGMENT
if (clip2 != 0 || pGC->capStyle != CapNotLast)
len++;
#else
len += (clip2 != 0);
#endif
if (len) {
int abserr, clipdx, clipdy;
/* unwind bresenham error term to first point */
if (clip1) {
clipdx = abs(new_x1 - x1);
clipdy = abs(new_y1 - y1);
if (octant & YMAJOR)
err = e + clipdy * dmin - clipdx * dmaj;
else
err = e + clipdx * dmin - clipdy * dmaj;
}
else
err = e;
#define range infoRec->SolidBresenhamLineErrorTermBits
abserr = abs(err);
while ((abserr & range) ||
(dmaj & range) || (dmin & range)) {
dmin >>= 1;
dmaj >>= 1;
abserr >>= 1;
err /= 2;
}
(*infoRec->SubsequentSolidBresenhamLine) (infoRec->
pScrn, new_x1,
new_y1, dmaj,
dmin, err,
len, octant);
}
pbox++;
}
} /* while (nbox--) */
} /* sloped line */
} /* while (nline--) */
#ifndef POLYSEGMENT
/* paint the last point if the end style isn't CapNotLast.
(Assume that a projecting, butt, or round cap that is one
pixel wide is the same as the single pixel of the endpoint.)
*/
if ((pGC->capStyle != CapNotLast) &&
((ppt->x + xorg != pptInit->x + pDrawable->x) ||
(ppt->y + yorg != pptInit->y + pDrawable->y) ||
(ppt == pptInit + 1))) {
nbox = nboxInit;
pbox = pboxInit;
while (nbox--) {
if ((x2 >= pbox->x1) && (y2 >= pbox->y1) &&
(x2 < pbox->x2) && (y2 < pbox->y2)) {
(*infoRec->SubsequentSolidHorVertLine) (infoRec->pScrn, x2, y2,
1, DEGREES_0);
break;
}
else
pbox++;
}
}
#endif
SET_SYNC_FLAG(infoRec);
}
|
