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[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) 2003-2007 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
26 static void highlight(RrPixel32 *x, RrPixel32 *y, gboolean raised);
27 static void gradient_parentrelative(RrAppearance *a, gint w, gint h);
28 static void gradient_solid(RrAppearance *l, gint w, gint h);
29 static void gradient_splitvertical(RrAppearance *a, gint w, gint h);
30 static void gradient_vertical(RrSurface *sf, gint w, gint h);
31 static void gradient_horizontal(RrSurface *sf, gint w, gint h);
32 static void gradient_mirrorhorizontal(RrSurface *sf, gint w, gint h);
33 static void gradient_diagonal(RrSurface *sf, gint w, gint h);
34 static void gradient_crossdiagonal(RrSurface *sf, gint w, gint h);
35 static void gradient_pyramid(RrSurface *sf, gint inw, gint inh);
36
37 void RrRender(RrAppearance *a, gint w, gint h)
38 {
39 RrPixel32 *data = a->surface.pixel_data;
40 RrPixel32 current;
41 guint r,g,b;
42 gint off, x;
43
44 switch (a->surface.grad) {
45 case RR_SURFACE_PARENTREL:
46 gradient_parentrelative(a, w, h);
47 break;
48 case RR_SURFACE_SOLID:
49 gradient_solid(a, w, h);
50 break;
51 case RR_SURFACE_SPLIT_VERTICAL:
52 gradient_splitvertical(a, w, h);
53 break;
54 case RR_SURFACE_VERTICAL:
55 gradient_vertical(&a->surface, w, h);
56 break;
57 case RR_SURFACE_HORIZONTAL:
58 gradient_horizontal(&a->surface, w, h);
59 break;
60 case RR_SURFACE_MIRROR_HORIZONTAL:
61 gradient_mirrorhorizontal(&a->surface, w, h);
62 break;
63 case RR_SURFACE_DIAGONAL:
64 gradient_diagonal(&a->surface, w, h);
65 break;
66 case RR_SURFACE_CROSS_DIAGONAL:
67 gradient_crossdiagonal(&a->surface, w, h);
68 break;
69 case RR_SURFACE_PYRAMID:
70 gradient_pyramid(&a->surface, w, h);
71 break;
72 default:
73 g_assert_not_reached(); /* unhandled gradient */
74 return;
75 }
76
77 if (a->surface.interlaced) {
78 gint i;
79 RrPixel32 *p;
80
81 r = a->surface.interlace_color->r;
82 g = a->surface.interlace_color->g;
83 b = a->surface.interlace_color->b;
84 current = (r << RrDefaultRedOffset)
85 + (g << RrDefaultGreenOffset)
86 + (b << RrDefaultBlueOffset);
87 p = data;
88 for (i = 0; i < h; i += 2, p += w)
89 for (x = 0; x < w; ++x, ++p)
90 *p = current;
91 }
92
93 if (a->surface.relief == RR_RELIEF_FLAT && a->surface.border) {
94 r = a->surface.border_color->r;
95 g = a->surface.border_color->g;
96 b = a->surface.border_color->b;
97 current = (r << RrDefaultRedOffset)
98 + (g << RrDefaultGreenOffset)
99 + (b << RrDefaultBlueOffset);
100 for (off = 0, x = 0; x < w; ++x, off++) {
101 *(data + off) = current;
102 *(data + off + ((h-1) * w)) = current;
103 }
104 for (off = 0, x = 0; x < h; ++x, off++) {
105 *(data + (off * w)) = current;
106 *(data + (off * w) + w - 1) = current;
107 }
108 }
109
110 if (a->surface.relief != RR_RELIEF_FLAT) {
111 if (a->surface.bevel == RR_BEVEL_1) {
112 for (off = 1, x = 1; x < w - 1; ++x, off++)
113 highlight(data + off,
114 data + off + (h-1) * w,
115 a->surface.relief==RR_RELIEF_RAISED);
116 for (off = 0, x = 0; x < h; ++x, off++)
117 highlight(data + off * w,
118 data + off * w + w - 1,
119 a->surface.relief==RR_RELIEF_RAISED);
120 }
121
122 if (a->surface.bevel == RR_BEVEL_2) {
123 for (off = 2, x = 2; x < w - 2; ++x, off++)
124 highlight(data + off + w,
125 data + off + (h-2) * w,
126 a->surface.relief==RR_RELIEF_RAISED);
127 for (off = 1, x = 1; x < h-1; ++x, off++)
128 highlight(data + off * w + 1,
129 data + off * w + w - 2,
130 a->surface.relief==RR_RELIEF_RAISED);
131 }
132 }
133 }
134
135 static void highlight(RrPixel32 *x, RrPixel32 *y, gboolean raised)
136 {
137 gint r, g, b;
138
139 RrPixel32 *up, *down;
140 if (raised) {
141 up = x;
142 down = y;
143 } else {
144 up = y;
145 down = x;
146 }
147 r = (*up >> RrDefaultRedOffset) & 0xFF;
148 r += r >> 1;
149 g = (*up >> RrDefaultGreenOffset) & 0xFF;
150 g += g >> 1;
151 b = (*up >> RrDefaultBlueOffset) & 0xFF;
152 b += b >> 1;
153 if (r > 0xFF) r = 0xFF;
154 if (g > 0xFF) g = 0xFF;
155 if (b > 0xFF) b = 0xFF;
156 *up = (r << RrDefaultRedOffset) + (g << RrDefaultGreenOffset)
157 + (b << RrDefaultBlueOffset);
158
159 r = (*down >> RrDefaultRedOffset) & 0xFF;
160 r = (r >> 1) + (r >> 2);
161 g = (*down >> RrDefaultGreenOffset) & 0xFF;
162 g = (g >> 1) + (g >> 2);
163 b = (*down >> RrDefaultBlueOffset) & 0xFF;
164 b = (b >> 1) + (b >> 2);
165 *down = (r << RrDefaultRedOffset) + (g << RrDefaultGreenOffset)
166 + (b << RrDefaultBlueOffset);
167 }
168
169 static void create_bevel_colors(RrAppearance *l)
170 {
171 gint r, g, b;
172
173 /* light color */
174 r = l->surface.primary->r;
175 r += r >> 1;
176 g = l->surface.primary->g;
177 g += g >> 1;
178 b = l->surface.primary->b;
179 b += b >> 1;
180 if (r > 0xFF) r = 0xFF;
181 if (g > 0xFF) g = 0xFF;
182 if (b > 0xFF) b = 0xFF;
183 g_assert(!l->surface.bevel_light);
184 l->surface.bevel_light = RrColorNew(l->inst, r, g, b);
185
186 /* dark color */
187 r = l->surface.primary->r;
188 r = (r >> 1) + (r >> 2);
189 g = l->surface.primary->g;
190 g = (g >> 1) + (g >> 2);
191 b = l->surface.primary->b;
192 b = (b >> 1) + (b >> 2);
193 g_assert(!l->surface.bevel_dark);
194 l->surface.bevel_dark = RrColorNew(l->inst, r, g, b);
195 }
196
197 static void gradient_parentrelative(RrAppearance *a, gint w, gint h)
198 {
199 RrPixel32 *source, *dest;
200 gint sw, sh, partial_w, partial_h, i;
201
202 g_assert (a->surface.parent);
203 g_assert (a->surface.parent->w);
204
205 sw = a->surface.parent->w;
206 sh = a->surface.parent->h;
207
208 /* This is a little hack. When a texture is parentrelative, and the same
209 area as the parent, and has a bevel, it will draw its bevel on top
210 of the parent's, amplifying it. So instead, rerender the child with
211 the parent's settings, but the child's bevel and interlace */
212 if (a->surface.relief != RR_RELIEF_FLAT &&
213 (a->surface.parent->surface.relief != RR_RELIEF_FLAT ||
214 a->surface.parent->surface.border) &&
215 !a->surface.parentx && !a->surface.parenty &&
216 sw == w && sh == h)
217 {
218 RrSurface old = a->surface;
219 a->surface = a->surface.parent->surface;
220
221 /* turn these off for the parent */
222 a->surface.relief = RR_RELIEF_FLAT;
223 a->surface.border = FALSE;
224
225 a->surface.pixel_data = old.pixel_data;
226
227 RrRender(a, w, h);
228 a->surface = old;
229 } else {
230 source = (a->surface.parent->surface.pixel_data +
231 a->surface.parentx + sw * a->surface.parenty);
232 dest = a->surface.pixel_data;
233
234 if (a->surface.parentx + w > sw) {
235 partial_w = sw - a->surface.parentx;
236 } else partial_w = w;
237
238 if (a->surface.parenty + h > sh) {
239 partial_h = sh - a->surface.parenty;
240 } else partial_h = h;
241
242 for (i = 0; i < partial_h; i++, source += sw, dest += w) {
243 memcpy(dest, source, partial_w * sizeof(RrPixel32));
244 }
245 }
246 }
247
248 static void gradient_solid(RrAppearance *l, gint w, gint h)
249 {
250 gint i;
251 RrPixel32 pix;
252 RrPixel32 *data = l->surface.pixel_data;
253 RrSurface *sp = &l->surface;
254 gint left = 0, top = 0, right = w - 1, bottom = h - 1;
255
256 pix = (sp->primary->r << RrDefaultRedOffset)
257 + (sp->primary->g << RrDefaultGreenOffset)
258 + (sp->primary->b << RrDefaultBlueOffset);
259
260 for (i = 0; i < w * h; i++)
261 *data++ = pix;
262
263 if (sp->interlaced)
264 return;
265
266 XFillRectangle(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->primary),
267 0, 0, w, h);
268
269 switch (sp->relief) {
270 case RR_RELIEF_RAISED:
271 if (!sp->bevel_dark)
272 create_bevel_colors(l);
273
274 switch (sp->bevel) {
275 case RR_BEVEL_1:
276 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
277 left, bottom, right, bottom);
278 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
279 right, bottom, right, top);
280
281 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
282 left, top, right, top);
283 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
284 left, bottom, left, top);
285 break;
286 case RR_BEVEL_2:
287 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
288 left + 2, bottom - 1, right - 2, bottom - 1);
289 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
290 right - 1, bottom - 1, right - 1, top + 1);
291
292 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
293 left + 2, top + 1, right - 2, top + 1);
294 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
295 left + 1, bottom - 1, left + 1, top + 1);
296 break;
297 default:
298 g_assert_not_reached(); /* unhandled BevelType */
299 }
300 break;
301 case RR_RELIEF_SUNKEN:
302 if (!sp->bevel_dark)
303 create_bevel_colors(l);
304
305 switch (sp->bevel) {
306 case RR_BEVEL_1:
307 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
308 left, bottom, right, bottom);
309 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
310 right, bottom, right, top);
311
312 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
313 left, top, right, top);
314 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
315 left, bottom, left, top);
316 break;
317 case RR_BEVEL_2:
318 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
319 left + 2, bottom - 1, right - 2, bottom - 1);
320 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
321 right - 1, bottom - 1, right - 1, top + 1);
322
323 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
324 left + 2, top + 1, right - 2, top + 1);
325 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
326 left + 1, bottom - 1, left + 1, top + 1);
327 break;
328 default:
329 g_assert_not_reached(); /* unhandled BevelType */
330 }
331 break;
332 case RR_RELIEF_FLAT:
333 if (sp->border) {
334 XDrawRectangle(RrDisplay(l->inst), l->pixmap,
335 RrColorGC(sp->border_color),
336 left, top, right, bottom);
337 }
338 break;
339 default:
340 g_assert_not_reached(); /* unhandled ReliefType */
341 }
342 }
343
344 /* * * * * * * * * * * * * * GRADIENT MAGIC WOOT * * * * * * * * * * * * * * */
345
346 #define VARS(x) \
347 guint color##x[3]; \
348 gint len##x, cdelta##x[3], error##x[3] = { 0, 0, 0 }, inc##x[3]; \
349 gboolean bigslope##x[3] /* color slope > 1 */
350
351 #define SETUP(x, from, to, w) \
352 len##x = w; \
353 \
354 color##x[0] = from->r; \
355 color##x[1] = from->g; \
356 color##x[2] = from->b; \
357 \
358 cdelta##x[0] = to->r - from->r; \
359 cdelta##x[1] = to->g - from->g; \
360 cdelta##x[2] = to->b - from->b; \
361 \
362 if (cdelta##x[0] < 0) { \
363 cdelta##x[0] = -cdelta##x[0]; \
364 inc##x[0] = -1; \
365 } else \
366 inc##x[0] = 1; \
367 if (cdelta##x[1] < 0) { \
368 cdelta##x[1] = -cdelta##x[1]; \
369 inc##x[1] = -1; \
370 } else \
371 inc##x[1] = 1; \
372 if (cdelta##x[2] < 0) { \
373 cdelta##x[2] = -cdelta##x[2]; \
374 inc##x[2] = -1; \
375 } else \
376 inc##x[2] = 1; \
377 bigslope##x[0] = cdelta##x[0] > w;\
378 bigslope##x[1] = cdelta##x[1] > w;\
379 bigslope##x[2] = cdelta##x[2] > w
380
381 #define COLOR_RR(x, c) \
382 c->r = color##x[0]; \
383 c->g = color##x[1]; \
384 c->b = color##x[2]
385
386 #define COLOR(x) \
387 ((color##x[0] << RrDefaultRedOffset) + \
388 (color##x[1] << RrDefaultGreenOffset) + \
389 (color##x[2] << RrDefaultBlueOffset))
390
391 #define INCREMENT(x, i) \
392 (inc##x[i])
393
394 #define NEXT(x) \
395 { \
396 gint i; \
397 for (i = 2; i >= 0; --i) { \
398 if (!cdelta##x[i]) continue; \
399 \
400 if (!bigslope##x[i]) { \
401 /* Y (color) is dependant on X */ \
402 error##x[i] += cdelta##x[i]; \
403 if ((error##x[i] << 1) >= len##x) { \
404 color##x[i] += INCREMENT(x, i); \
405 error##x[i] -= len##x; \
406 } \
407 } else { \
408 /* X is dependant on Y (color) */ \
409 while (1) { \
410 color##x[i] += INCREMENT(x, i); \
411 error##x[i] += len##x; \
412 if ((error##x[i] << 1) >= cdelta##x[i]) { \
413 error##x[i] -= cdelta##x[i]; \
414 break; \
415 } \
416 } \
417 } \
418 } \
419 }
420
421 static void gradient_splitvertical(RrAppearance *a, gint w, gint h)
422 {
423 gint x, y1, y2, y3, r, g, b;
424 RrSurface *sf = &a->surface;
425 RrPixel32 *data = sf->pixel_data;
426 RrPixel32 current;
427 RrColor *primary_light, *secondary_light;
428 gint y1sz, y2sz, y3sz;
429
430 VARS(y1);
431 VARS(y2);
432 VARS(y3);
433
434 r = sf->primary->r;
435 r += r >> 2;
436 g = sf->primary->g;
437 g += g >> 2;
438 b = sf->primary->b;
439 b += b >> 2;
440 if (r > 0xFF) r = 0xFF;
441 if (g > 0xFF) g = 0xFF;
442 if (b > 0xFF) b = 0xFF;
443 primary_light = RrColorNew(a->inst, r, g, b);
444
445 r = sf->secondary->r;
446 r += r >> 4;
447 g = sf->secondary->g;
448 g += g >> 4;
449 b = sf->secondary->b;
450 b += b >> 4;
451 if (r > 0xFF) r = 0xFF;
452 if (g > 0xFF) g = 0xFF;
453 if (b > 0xFF) b = 0xFF;
454 secondary_light = RrColorNew(a->inst, r, g, b);
455
456 y1sz = MAX(h/2 - 1, 1);
457 /* setup to get the colors _in between_ these other 2 */
458 y2sz = (h < 3 ? 0 : (h % 2 ? 3 : 2));
459 y3sz = MAX(h/2 - 1, 0);
460
461 SETUP(y1, primary_light, sf->primary, y1sz);
462 SETUP(y2, sf->primary, sf->secondary, y2sz);
463 SETUP(y3, sf->secondary, secondary_light, y3sz);
464
465 for (y1 = y1sz; y1 > 0; --y1) {
466 current = COLOR(y1);
467 for (x = w - 1; x >= 0; --x)
468 *(data++) = current;
469
470 NEXT(y1);
471 }
472
473 NEXT(y2); /* skip the first one, its the same as the last of y1 */
474 for (y2 = y2sz; y2 > 0; --y2) {
475 current = COLOR(y2);
476 for (x = w - 1; x >= 0; --x)
477 *(data++) = current;
478
479 NEXT(y2);
480 }
481
482 for (y3 = y3sz; y3 > 0; --y3) {
483 current = COLOR(y3);
484 for (x = w - 1; x >= 0; --x)
485 *(data++) = current;
486
487 NEXT(y3);
488 }
489
490 RrColorFree(primary_light);
491 RrColorFree(secondary_light);
492 }
493
494 static void gradient_horizontal(RrSurface *sf, gint w, gint h)
495 {
496 gint x, y;
497 RrPixel32 *data = sf->pixel_data, *datav;
498 RrPixel32 current;
499
500 VARS(x);
501 SETUP(x, sf->primary, sf->secondary, w);
502
503 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
504 current = COLOR(x);
505 datav = data;
506 for (y = h - 1; y >= 0; --y) { /* 0 -> h */
507 *datav = current;
508 datav += w;
509 }
510 ++data;
511
512 NEXT(x);
513 }
514 current = COLOR(x);
515 for (y = h - 1; y >= 0; --y) /* 0 -> h */
516 *(data + y * w) = current;
517 }
518
519 static void gradient_mirrorhorizontal(RrSurface *sf, gint w, gint h)
520 {
521 gint x, y;
522 RrPixel32 *data = sf->pixel_data, *datav;
523 RrPixel32 current;
524
525 VARS(x);
526 SETUP(x, sf->primary, sf->secondary, w/2);
527
528 if (w > 1) {
529 for (x = w - 1; x > w/2-1; --x) { /* 0 -> w-1 */
530 current = COLOR(x);
531 datav = data;
532 for (y = h - 1; y >= 0; --y) { /* 0 -> h */
533 *datav = current;
534 datav += w;
535 }
536 ++data;
537
538 NEXT(x);
539 }
540 SETUP(x, sf->secondary, sf->primary, w/2);
541 for (x = w/2 - 1; x > 0; --x) { /* 0 -> w-1 */
542 current = COLOR(x);
543 datav = data;
544 for (y = h - 1; y >= 0; --y) { /* 0 -> h */
545 *datav = current;
546 datav += w;
547 }
548 ++data;
549
550 NEXT(x);
551 }
552 }
553 current = COLOR(x);
554 for (y = h - 1; y >= 0; --y) /* 0 -> h */
555 *(data + y * w) = current;
556 }
557
558 static void gradient_vertical(RrSurface *sf, gint w, gint h)
559 {
560 gint x, y;
561 RrPixel32 *data = sf->pixel_data;
562 RrPixel32 current;
563
564 VARS(y);
565 SETUP(y, sf->primary, sf->secondary, h);
566
567 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
568 current = COLOR(y);
569 for (x = w - 1; x >= 0; --x) /* 0 -> w */
570 *(data++) = current;
571
572 NEXT(y);
573 }
574 current = COLOR(y);
575 for (x = w - 1; x >= 0; --x) /* 0 -> w */
576 *(data++) = current;
577 }
578
579
580 static void gradient_diagonal(RrSurface *sf, gint w, gint h)
581 {
582 gint x, y;
583 RrPixel32 *data = sf->pixel_data;
584 RrColor left, right;
585 RrColor extracorner;
586
587 VARS(lefty);
588 VARS(righty);
589 VARS(x);
590
591 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
592 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
593 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
594
595 SETUP(lefty, sf->primary, (&extracorner), h);
596 SETUP(righty, (&extracorner), sf->secondary, h);
597
598 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
599 COLOR_RR(lefty, (&left));
600 COLOR_RR(righty, (&right));
601
602 SETUP(x, (&left), (&right), w);
603
604 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
605 *(data++) = COLOR(x);
606
607 NEXT(x);
608 }
609 *(data++) = COLOR(x);
610
611 NEXT(lefty);
612 NEXT(righty);
613 }
614 COLOR_RR(lefty, (&left));
615 COLOR_RR(righty, (&right));
616
617 SETUP(x, (&left), (&right), w);
618
619 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
620 *(data++) = COLOR(x);
621
622 NEXT(x);
623 }
624 *data = COLOR(x);
625 }
626
627 static void gradient_crossdiagonal(RrSurface *sf, gint w, gint h)
628 {
629 gint x, y;
630 RrPixel32 *data = sf->pixel_data;
631 RrColor left, right;
632 RrColor extracorner;
633
634 VARS(lefty);
635 VARS(righty);
636 VARS(x);
637
638 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
639 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
640 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
641
642 SETUP(lefty, (&extracorner), sf->secondary, h);
643 SETUP(righty, sf->primary, (&extracorner), h);
644
645 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
646 COLOR_RR(lefty, (&left));
647 COLOR_RR(righty, (&right));
648
649 SETUP(x, (&left), (&right), w);
650
651 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
652 *(data++) = COLOR(x);
653
654 NEXT(x);
655 }
656 *(data++) = COLOR(x);
657
658 NEXT(lefty);
659 NEXT(righty);
660 }
661 COLOR_RR(lefty, (&left));
662 COLOR_RR(righty, (&right));
663
664 SETUP(x, (&left), (&right), w);
665
666 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
667 *(data++) = COLOR(x);
668
669 NEXT(x);
670 }
671 *data = COLOR(x);
672 }
673
674 static void gradient_pyramid(RrSurface *sf, gint inw, gint inh)
675 {
676 gint x, y, w = (inw >> 1) + 1, h = (inh >> 1) + 1;
677 RrPixel32 *data = sf->pixel_data;
678 RrPixel32 *end = data + inw*inh - 1;
679 RrPixel32 current;
680 RrColor left, right;
681 RrColor extracorner;
682
683 VARS(lefty);
684 VARS(righty);
685 VARS(x);
686
687 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
688 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
689 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
690
691 SETUP(lefty, (&extracorner), sf->secondary, h);
692 SETUP(righty, sf->primary, (&extracorner), h);
693
694 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
695 COLOR_RR(lefty, (&left));
696 COLOR_RR(righty, (&right));
697
698 SETUP(x, (&left), (&right), w);
699
700 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
701 current = COLOR(x);
702 *(data+x) = current;
703 *(data+inw-x) = current;
704 *(end-x) = current;
705 *(end-(inw-x)) = current;
706
707 NEXT(x);
708 }
709 current = COLOR(x);
710 *(data+x) = current;
711 *(data+inw-x) = current;
712 *(end-x) = current;
713 *(end-(inw-x)) = current;
714
715 data+=inw;
716 end-=inw;
717
718 NEXT(lefty);
719 NEXT(righty);
720 }
721 COLOR_RR(lefty, (&left));
722 COLOR_RR(righty, (&right));
723
724 SETUP(x, (&left), (&right), w);
725
726 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
727 current = COLOR(x);
728 *(data+x) = current;
729 *(data+inw-x) = current;
730 *(end-x) = current;
731 *(end-(inw-x)) = current;
732
733 NEXT(x);
734 }
735 current = COLOR(x);
736 *(data+x) = current;
737 *(data+inw-x) = current;
738 *(end-x) = current;
739 *(end-(inw-x)) = current;
740 }
741
my patches for the openbox window manager
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