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use memcpy's to make splitvertical gradient much faster - using log n memcpy's is...
[chaz/openbox] / render / gradient.c
1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
2
3 gradient.c for the Openbox window manager
4 Copyright (c) 2006 Mikael Magnusson
5 Copyright (c) 2003-2008 Dana Jansens
6 Copyright (c) 2003 Derek Foreman
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 See the COPYING file for a copy of the GNU General Public License.
19 */
20
21 #include "render.h"
22 #include "gradient.h"
23 #include "color.h"
24 #include <glib.h>
25 #include <string.h>
26
27 static void highlight(RrSurface *s, RrPixel32 *x, RrPixel32 *y,
28 gboolean raised);
29 static void gradient_parentrelative(RrAppearance *a, gint w, gint h);
30 static void gradient_solid(RrAppearance *l, gint w, gint h);
31 static void gradient_splitvertical(RrAppearance *a, gint w, gint h);
32 static void gradient_vertical(RrSurface *sf, gint w, gint h);
33 static void gradient_horizontal(RrSurface *sf, gint w, gint h);
34 static void gradient_mirrorhorizontal(RrSurface *sf, gint w, gint h);
35 static void gradient_diagonal(RrSurface *sf, gint w, gint h);
36 static void gradient_crossdiagonal(RrSurface *sf, gint w, gint h);
37 static void gradient_pyramid(RrSurface *sf, gint inw, gint inh);
38
39 void RrRender(RrAppearance *a, gint w, gint h)
40 {
41 RrPixel32 *data = a->surface.pixel_data;
42 RrPixel32 current;
43 guint r,g,b;
44 gint off, x;
45
46 switch (a->surface.grad) {
47 case RR_SURFACE_PARENTREL:
48 gradient_parentrelative(a, w, h);
49 break;
50 case RR_SURFACE_SOLID:
51 gradient_solid(a, w, h);
52 break;
53 case RR_SURFACE_SPLIT_VERTICAL:
54 gradient_splitvertical(a, w, h);
55 break;
56 case RR_SURFACE_VERTICAL:
57 gradient_vertical(&a->surface, w, h);
58 break;
59 case RR_SURFACE_HORIZONTAL:
60 gradient_horizontal(&a->surface, w, h);
61 break;
62 case RR_SURFACE_MIRROR_HORIZONTAL:
63 gradient_mirrorhorizontal(&a->surface, w, h);
64 break;
65 case RR_SURFACE_DIAGONAL:
66 gradient_diagonal(&a->surface, w, h);
67 break;
68 case RR_SURFACE_CROSS_DIAGONAL:
69 gradient_crossdiagonal(&a->surface, w, h);
70 break;
71 case RR_SURFACE_PYRAMID:
72 gradient_pyramid(&a->surface, w, h);
73 break;
74 default:
75 g_assert_not_reached(); /* unhandled gradient */
76 return;
77 }
78
79 if (a->surface.interlaced) {
80 gint i;
81 RrPixel32 *p;
82
83 r = a->surface.interlace_color->r;
84 g = a->surface.interlace_color->g;
85 b = a->surface.interlace_color->b;
86 current = (r << RrDefaultRedOffset)
87 + (g << RrDefaultGreenOffset)
88 + (b << RrDefaultBlueOffset);
89 p = data;
90 for (i = 0; i < h; i += 2, p += w)
91 for (x = 0; x < w; ++x, ++p)
92 *p = current;
93 }
94
95 if (a->surface.relief == RR_RELIEF_FLAT && a->surface.border) {
96 r = a->surface.border_color->r;
97 g = a->surface.border_color->g;
98 b = a->surface.border_color->b;
99 current = (r << RrDefaultRedOffset)
100 + (g << RrDefaultGreenOffset)
101 + (b << RrDefaultBlueOffset);
102 for (off = 0, x = 0; x < w; ++x, off++) {
103 *(data + off) = current;
104 *(data + off + ((h-1) * w)) = current;
105 }
106 for (off = 0, x = 0; x < h; ++x, off++) {
107 *(data + (off * w)) = current;
108 *(data + (off * w) + w - 1) = current;
109 }
110 }
111
112 if (a->surface.relief != RR_RELIEF_FLAT) {
113 if (a->surface.bevel == RR_BEVEL_1) {
114 for (off = 1, x = 1; x < w - 1; ++x, off++)
115 highlight(&a->surface, data + off,
116 data + off + (h-1) * w,
117 a->surface.relief==RR_RELIEF_RAISED);
118 for (off = 0, x = 0; x < h; ++x, off++)
119 highlight(&a->surface, data + off * w,
120 data + off * w + w - 1,
121 a->surface.relief==RR_RELIEF_RAISED);
122 }
123
124 if (a->surface.bevel == RR_BEVEL_2) {
125 for (off = 2, x = 2; x < w - 2; ++x, off++)
126 highlight(&a->surface, data + off + w,
127 data + off + (h-2) * w,
128 a->surface.relief==RR_RELIEF_RAISED);
129 for (off = 1, x = 1; x < h-1; ++x, off++)
130 highlight(&a->surface, data + off * w + 1,
131 data + off * w + w - 2,
132 a->surface.relief==RR_RELIEF_RAISED);
133 }
134 }
135 }
136
137 static void highlight(RrSurface *s, RrPixel32 *x, RrPixel32 *y, gboolean raised)
138 {
139 gint r, g, b;
140
141 RrPixel32 *up, *down;
142 if (raised) {
143 up = x;
144 down = y;
145 } else {
146 up = y;
147 down = x;
148 }
149
150 r = (*up >> RrDefaultRedOffset) & 0xFF;
151 r += (r * s->bevel_light_adjust) >> 8;
152 g = (*up >> RrDefaultGreenOffset) & 0xFF;
153 g += (g * s->bevel_light_adjust) >> 8;
154 b = (*up >> RrDefaultBlueOffset) & 0xFF;
155 b += (b * s->bevel_light_adjust) >> 8;
156 if (r > 0xFF) r = 0xFF;
157 if (g > 0xFF) g = 0xFF;
158 if (b > 0xFF) b = 0xFF;
159 *up = (r << RrDefaultRedOffset) + (g << RrDefaultGreenOffset)
160 + (b << RrDefaultBlueOffset);
161
162 r = (*down >> RrDefaultRedOffset) & 0xFF;
163 r -= (r * s->bevel_dark_adjust) >> 8;
164 g = (*down >> RrDefaultGreenOffset) & 0xFF;
165 g -= (g * s->bevel_dark_adjust) >> 8;
166 b = (*down >> RrDefaultBlueOffset) & 0xFF;
167 b -= (b * s->bevel_dark_adjust) >> 8;
168 *down = (r << RrDefaultRedOffset) + (g << RrDefaultGreenOffset)
169 + (b << RrDefaultBlueOffset);
170 }
171
172 static void create_bevel_colors(RrAppearance *l)
173 {
174 gint r, g, b;
175
176 /* light color */
177 r = l->surface.primary->r;
178 r += (r * l->surface.bevel_light_adjust) >> 8;
179 g = l->surface.primary->g;
180 g += (g * l->surface.bevel_light_adjust) >> 8;
181 b = l->surface.primary->b;
182 b += (b * l->surface.bevel_light_adjust) >> 8;
183 if (r > 0xFF) r = 0xFF;
184 if (g > 0xFF) g = 0xFF;
185 if (b > 0xFF) b = 0xFF;
186 g_assert(!l->surface.bevel_light);
187 l->surface.bevel_light = RrColorNew(l->inst, r, g, b);
188
189 /* dark color */
190 r = l->surface.primary->r;
191 r -= (r * l->surface.bevel_dark_adjust) >> 8;
192 g = l->surface.primary->g;
193 g -= (g * l->surface.bevel_dark_adjust) >> 8;
194 b = l->surface.primary->b;
195 b -= (b * l->surface.bevel_dark_adjust) >> 8;
196 g_assert(!l->surface.bevel_dark);
197 l->surface.bevel_dark = RrColorNew(l->inst, r, g, b);
198 }
199
200 static void gradient_parentrelative(RrAppearance *a, gint w, gint h)
201 {
202 RrPixel32 *source, *dest;
203 gint sw, sh, partial_w, partial_h, i;
204
205 g_assert (a->surface.parent);
206 g_assert (a->surface.parent->w);
207
208 sw = a->surface.parent->w;
209 sh = a->surface.parent->h;
210
211 /* This is a little hack. When a texture is parentrelative, and the same
212 area as the parent, and has a bevel, it will draw its bevel on top
213 of the parent's, amplifying it. So instead, rerender the child with
214 the parent's settings, but the child's bevel and interlace */
215 if (a->surface.relief != RR_RELIEF_FLAT &&
216 (a->surface.parent->surface.relief != RR_RELIEF_FLAT ||
217 a->surface.parent->surface.border) &&
218 !a->surface.parentx && !a->surface.parenty &&
219 sw == w && sh == h)
220 {
221 RrSurface old = a->surface;
222 a->surface = a->surface.parent->surface;
223
224 /* turn these off for the parent */
225 a->surface.relief = RR_RELIEF_FLAT;
226 a->surface.border = FALSE;
227
228 a->surface.pixel_data = old.pixel_data;
229
230 RrRender(a, w, h);
231 a->surface = old;
232 } else {
233 source = (a->surface.parent->surface.pixel_data +
234 a->surface.parentx + sw * a->surface.parenty);
235 dest = a->surface.pixel_data;
236
237 if (a->surface.parentx + w > sw) {
238 partial_w = sw - a->surface.parentx;
239 } else partial_w = w;
240
241 if (a->surface.parenty + h > sh) {
242 partial_h = sh - a->surface.parenty;
243 } else partial_h = h;
244
245 for (i = 0; i < partial_h; i++, source += sw, dest += w) {
246 memcpy(dest, source, partial_w * sizeof(RrPixel32));
247 }
248 }
249 }
250
251 static void gradient_solid(RrAppearance *l, gint w, gint h)
252 {
253 gint i;
254 RrPixel32 pix;
255 RrPixel32 *data = l->surface.pixel_data;
256 RrSurface *sp = &l->surface;
257 gint left = 0, top = 0, right = w - 1, bottom = h - 1;
258
259 pix = (sp->primary->r << RrDefaultRedOffset)
260 + (sp->primary->g << RrDefaultGreenOffset)
261 + (sp->primary->b << RrDefaultBlueOffset);
262
263 for (i = 0; i < w * h; i++)
264 *data++ = pix;
265
266 if (sp->interlaced)
267 return;
268
269 XFillRectangle(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->primary),
270 0, 0, w, h);
271
272 switch (sp->relief) {
273 case RR_RELIEF_RAISED:
274 if (!sp->bevel_dark)
275 create_bevel_colors(l);
276
277 switch (sp->bevel) {
278 case RR_BEVEL_1:
279 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
280 left, bottom, right, bottom);
281 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
282 right, bottom, right, top);
283
284 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
285 left, top, right, top);
286 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
287 left, bottom, left, top);
288 break;
289 case RR_BEVEL_2:
290 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
291 left + 2, bottom - 1, right - 2, bottom - 1);
292 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
293 right - 1, bottom - 1, right - 1, top + 1);
294
295 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
296 left + 2, top + 1, right - 2, top + 1);
297 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
298 left + 1, bottom - 1, left + 1, top + 1);
299 break;
300 default:
301 g_assert_not_reached(); /* unhandled BevelType */
302 }
303 break;
304 case RR_RELIEF_SUNKEN:
305 if (!sp->bevel_dark)
306 create_bevel_colors(l);
307
308 switch (sp->bevel) {
309 case RR_BEVEL_1:
310 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
311 left, bottom, right, bottom);
312 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
313 right, bottom, right, top);
314
315 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
316 left, top, right, top);
317 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
318 left, bottom, left, top);
319 break;
320 case RR_BEVEL_2:
321 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
322 left + 2, bottom - 1, right - 2, bottom - 1);
323 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
324 right - 1, bottom - 1, right - 1, top + 1);
325
326 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
327 left + 2, top + 1, right - 2, top + 1);
328 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
329 left + 1, bottom - 1, left + 1, top + 1);
330 break;
331 default:
332 g_assert_not_reached(); /* unhandled BevelType */
333 }
334 break;
335 case RR_RELIEF_FLAT:
336 if (sp->border) {
337 XDrawRectangle(RrDisplay(l->inst), l->pixmap,
338 RrColorGC(sp->border_color),
339 left, top, right, bottom);
340 }
341 break;
342 default:
343 g_assert_not_reached(); /* unhandled ReliefType */
344 }
345 }
346
347 /* * * * * * * * * * * * * * GRADIENT MAGIC WOOT * * * * * * * * * * * * * * */
348
349 #define VARS(x) \
350 guint color##x[3]; \
351 gint len##x, cdelta##x[3], error##x[3] = { 0, 0, 0 }, inc##x[3]; \
352 gboolean bigslope##x[3] /* color slope > 1 */
353
354 #define SETUP(x, from, to, w) \
355 len##x = w; \
356 \
357 color##x[0] = from->r; \
358 color##x[1] = from->g; \
359 color##x[2] = from->b; \
360 \
361 cdelta##x[0] = to->r - from->r; \
362 cdelta##x[1] = to->g - from->g; \
363 cdelta##x[2] = to->b - from->b; \
364 \
365 if (cdelta##x[0] < 0) { \
366 cdelta##x[0] = -cdelta##x[0]; \
367 inc##x[0] = -1; \
368 } else \
369 inc##x[0] = 1; \
370 if (cdelta##x[1] < 0) { \
371 cdelta##x[1] = -cdelta##x[1]; \
372 inc##x[1] = -1; \
373 } else \
374 inc##x[1] = 1; \
375 if (cdelta##x[2] < 0) { \
376 cdelta##x[2] = -cdelta##x[2]; \
377 inc##x[2] = -1; \
378 } else \
379 inc##x[2] = 1; \
380 bigslope##x[0] = cdelta##x[0] > w;\
381 bigslope##x[1] = cdelta##x[1] > w;\
382 bigslope##x[2] = cdelta##x[2] > w
383
384 #define COLOR_RR(x, c) \
385 c->r = color##x[0]; \
386 c->g = color##x[1]; \
387 c->b = color##x[2]
388
389 #define COLOR(x) \
390 ((color##x[0] << RrDefaultRedOffset) + \
391 (color##x[1] << RrDefaultGreenOffset) + \
392 (color##x[2] << RrDefaultBlueOffset))
393
394 #define INCREMENT(x, i) \
395 (inc##x[i])
396
397 #define NEXT(x) \
398 { \
399 gint i; \
400 for (i = 2; i >= 0; --i) { \
401 if (!cdelta##x[i]) continue; \
402 \
403 if (!bigslope##x[i]) { \
404 /* Y (color) is dependant on X */ \
405 error##x[i] += cdelta##x[i]; \
406 if ((error##x[i] << 1) >= len##x) { \
407 color##x[i] += INCREMENT(x, i); \
408 error##x[i] -= len##x; \
409 } \
410 } else { \
411 /* X is dependant on Y (color) */ \
412 while (1) { \
413 color##x[i] += INCREMENT(x, i); \
414 error##x[i] += len##x; \
415 if ((error##x[i] << 1) >= cdelta##x[i]) { \
416 error##x[i] -= cdelta##x[i]; \
417 break; \
418 } \
419 } \
420 } \
421 } \
422 }
423
424 static void gradient_splitvertical(RrAppearance *a, gint w, gint h)
425 {
426 gint x, y1, y2, y3;
427 RrSurface *sf = &a->surface;
428 RrPixel32 *data, *start;
429 gint y1sz, y2sz, y3sz;
430
431 VARS(y1);
432 VARS(y2);
433 VARS(y3);
434
435 /* if h <= 5, then a 0 or 1px middle gradient.
436 if h > 5, then always a 1px middle gradient.
437 */
438 if (h <= 5) {
439 y1sz = MAX(h/2, 0);
440 y2sz = (h < 3 ? 0 : h % 2);
441 y3sz = MAX(h/2, 1);
442 }
443 else {
444 y1sz = h/2 - (1 - (h % 2));
445 y2sz = 1;
446 y3sz = h/2;
447 }
448
449 SETUP(y1, sf->split_primary, sf->primary, y1sz);
450 if (y2sz) {
451 /* setup to get the colors _in between_ these other 2 */
452 SETUP(y2, sf->primary, sf->secondary, y2sz + 2);
453 NEXT(y2); /* skip the first one, its the same as the last of y1 */
454 }
455 SETUP(y3, sf->secondary, sf->split_secondary, y3sz);
456
457 /* find the color for the first pixel of each row first */
458 data = sf->pixel_data;
459
460 for (y1 = y1sz-1; y1 > 0; --y1) {
461 *data = COLOR(y1);
462 data += w;
463 NEXT(y1);
464 }
465 *data = COLOR(y1);
466 data += w;
467 for (y2 = y2sz-1; y2 > 0; --y2) {
468 *data = COLOR(y2);
469 data += w;
470 NEXT(y2);
471 }
472 *data = COLOR(y2);
473 data += w;
474 for (y3 = y3sz-1; y3 > 0; --y3) {
475 *data = COLOR(y3);
476 data += w;
477 NEXT(y3);
478 }
479 *data = COLOR(y3);
480
481 /* copy the first pixels into the whole rows */
482
483 start = sf->pixel_data;
484 data = start + 1;
485
486 for (y1 = h; y1 > 0; --y1) {
487 /* for really small things, just copy ourselves */
488 if (w < 8) {
489 for (x = w-1; x > 0; --x)
490 *(data++) = *start;
491 }
492 /* for >= 8, then use O(log n) memcpy's... */
493 else {
494 gint len = 4;
495 gint lenbytes = 4 * sizeof(RrPixel32);
496
497 /* copy the first 3 * 32 bits (3 words) ourselves - then we have
498 3 + the original 1 = 4 words to make copies of at a time
499
500 this is faster than doing memcpy for 1 or 2 words at a time
501 */
502 for (x = 3; x > 0; --x)
503 *(data++) = *start;
504
505 for (x = w - 4; x > 0;) {
506 memcpy(data, start, lenbytes);
507 x -= len;
508 data += len;
509 len <<= 1;
510 lenbytes <<= 1;
511 if (len > x) {
512 len = x;
513 lenbytes = x * sizeof(RrPixel32);
514 }
515 }
516 }
517
518 start += w;
519 ++data;
520 }
521 }
522
523 static void gradient_horizontal(RrSurface *sf, gint w, gint h)
524 {
525 gint x, y;
526 RrPixel32 *data = sf->pixel_data, *datav;
527
528 VARS(x);
529 SETUP(x, sf->primary, sf->secondary, w);
530
531 datav = data;
532 for (x = w - 1; x > 0; --x) { /* 0 -> w - 1 */
533 *datav = COLOR(x);
534 ++datav;
535 NEXT(x);
536 }
537 *datav = COLOR(x);
538 ++datav;
539
540 for (y = h - 1; y > 0; --y) { /* 1 -> h */
541 memcpy(datav, data, w * sizeof(RrPixel32));
542 datav += w;
543 }
544 }
545
546 static void gradient_mirrorhorizontal(RrSurface *sf, gint w, gint h)
547 {
548 gint x, y, half1, half2;
549 RrPixel32 *data = sf->pixel_data, *datav;
550
551 VARS(x);
552
553 half1 = (w + 1) / 2;
554 half2 = w / 2;
555
556 SETUP(x, sf->primary, sf->secondary, half1);
557 datav = data;
558 for (x = half1 - 1; x > 0; --x) { /* 0 -> half1 - 1 */
559 *datav = COLOR(x);
560 ++datav;
561 NEXT(x);
562 }
563 *datav = COLOR(x);
564 ++datav;
565
566 if (half2 > 0) {
567 SETUP(x, sf->secondary, sf->primary, half2);
568 for (x = half2 - 1; x > 0; --x) { /* 0 -> half2 - 1 */
569 *datav = COLOR(x);
570 ++datav;
571 NEXT(x);
572 }
573 *datav = COLOR(x);
574 ++datav;
575 }
576
577 for (y = h - 1; y > 0; --y) { /* 1 -> h */
578 memcpy(datav, data, w * sizeof(RrPixel32));
579 datav += w;
580 }
581 }
582
583 static void gradient_vertical(RrSurface *sf, gint w, gint h)
584 {
585 gint x, y;
586 RrPixel32 *data = sf->pixel_data;
587 RrPixel32 current;
588
589 VARS(y);
590 SETUP(y, sf->primary, sf->secondary, h);
591
592 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
593 current = COLOR(y);
594 for (x = w; x > 0; --x) /* 0 -> w */
595 *(data++) = current;
596
597 NEXT(y);
598 }
599 current = COLOR(y);
600 for (x = w; x > 0; --x) /* 0 -> w */
601 *(data++) = current;
602 }
603
604
605 static void gradient_diagonal(RrSurface *sf, gint w, gint h)
606 {
607 gint x, y;
608 RrPixel32 *data = sf->pixel_data;
609 RrColor left, right;
610 RrColor extracorner;
611
612 VARS(lefty);
613 VARS(righty);
614 VARS(x);
615
616 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
617 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
618 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
619
620 SETUP(lefty, sf->primary, (&extracorner), h);
621 SETUP(righty, (&extracorner), sf->secondary, h);
622
623 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
624 COLOR_RR(lefty, (&left));
625 COLOR_RR(righty, (&right));
626
627 SETUP(x, (&left), (&right), w);
628
629 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
630 *(data++) = COLOR(x);
631
632 NEXT(x);
633 }
634 *(data++) = COLOR(x);
635
636 NEXT(lefty);
637 NEXT(righty);
638 }
639 COLOR_RR(lefty, (&left));
640 COLOR_RR(righty, (&right));
641
642 SETUP(x, (&left), (&right), w);
643
644 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
645 *(data++) = COLOR(x);
646
647 NEXT(x);
648 }
649 *data = COLOR(x);
650 }
651
652 static void gradient_crossdiagonal(RrSurface *sf, gint w, gint h)
653 {
654 gint x, y;
655 RrPixel32 *data = sf->pixel_data;
656 RrColor left, right;
657 RrColor extracorner;
658
659 VARS(lefty);
660 VARS(righty);
661 VARS(x);
662
663 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
664 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
665 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
666
667 SETUP(lefty, (&extracorner), sf->secondary, h);
668 SETUP(righty, sf->primary, (&extracorner), h);
669
670 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
671 COLOR_RR(lefty, (&left));
672 COLOR_RR(righty, (&right));
673
674 SETUP(x, (&left), (&right), w);
675
676 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
677 *(data++) = COLOR(x);
678
679 NEXT(x);
680 }
681 *(data++) = COLOR(x);
682
683 NEXT(lefty);
684 NEXT(righty);
685 }
686 COLOR_RR(lefty, (&left));
687 COLOR_RR(righty, (&right));
688
689 SETUP(x, (&left), (&right), w);
690
691 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
692 *(data++) = COLOR(x);
693
694 NEXT(x);
695 }
696 *data = COLOR(x);
697 }
698
699 static void gradient_pyramid(RrSurface *sf, gint inw, gint inh)
700 {
701 gint x, y, w = (inw >> 1) + 1, h = (inh >> 1) + 1;
702 RrPixel32 *data = sf->pixel_data;
703 RrPixel32 *end = data + inw*inh - 1;
704 RrPixel32 current;
705 RrColor left, right;
706 RrColor extracorner;
707
708 VARS(lefty);
709 VARS(righty);
710 VARS(x);
711
712 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
713 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
714 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
715
716 SETUP(lefty, (&extracorner), sf->secondary, h);
717 SETUP(righty, sf->primary, (&extracorner), h);
718
719 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
720 COLOR_RR(lefty, (&left));
721 COLOR_RR(righty, (&right));
722
723 SETUP(x, (&left), (&right), w);
724
725 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
726 current = COLOR(x);
727 *(data+x) = current;
728 *(data+inw-x) = current;
729 *(end-x) = current;
730 *(end-(inw-x)) = current;
731
732 NEXT(x);
733 }
734 current = COLOR(x);
735 *(data+x) = current;
736 *(data+inw-x) = current;
737 *(end-x) = current;
738 *(end-(inw-x)) = current;
739
740 data+=inw;
741 end-=inw;
742
743 NEXT(lefty);
744 NEXT(righty);
745 }
746 COLOR_RR(lefty, (&left));
747 COLOR_RR(righty, (&right));
748
749 SETUP(x, (&left), (&right), w);
750
751 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
752 current = COLOR(x);
753 *(data+x) = current;
754 *(data+inw-x) = current;
755 *(end-x) = current;
756 *(end-(inw-x)) = current;
757
758 NEXT(x);
759 }
760 current = COLOR(x);
761 *(data+x) = current;
762 *(data+inw-x) = current;
763 *(end-x) = current;
764 *(end-(inw-x)) = current;
765 }
766
my patches for the openbox window manager
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