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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(RrSurface *s, 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(&a->surface, 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(&a->surface, 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(&a->surface, 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(&a->surface, 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(RrSurface *s, 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
148 r = (*up >> RrDefaultRedOffset) & 0xFF;
149 r += (r * s->bevel_light_adjust) >> 8;
150 g = (*up >> RrDefaultGreenOffset) & 0xFF;
151 g += (g * s->bevel_light_adjust) >> 8;
152 b = (*up >> RrDefaultBlueOffset) & 0xFF;
153 b += (b * s->bevel_light_adjust) >> 8;
154 if (r > 0xFF) r = 0xFF;
155 if (g > 0xFF) g = 0xFF;
156 if (b > 0xFF) b = 0xFF;
157 *up = (r << RrDefaultRedOffset) + (g << RrDefaultGreenOffset)
158 + (b << RrDefaultBlueOffset);
159
160 r = (*down >> RrDefaultRedOffset) & 0xFF;
161 r -= (r * s->bevel_dark_adjust) >> 8;
162 g = (*down >> RrDefaultGreenOffset) & 0xFF;
163 g -= (g * s->bevel_dark_adjust) >> 8;
164 b = (*down >> RrDefaultBlueOffset) & 0xFF;
165 b -= (b * s->bevel_dark_adjust) >> 8;
166 *down = (r << RrDefaultRedOffset) + (g << RrDefaultGreenOffset)
167 + (b << RrDefaultBlueOffset);
168 }
169
170 static void create_bevel_colors(RrAppearance *l)
171 {
172 gint r, g, b;
173
174 /* light color */
175 r = l->surface.primary->r;
176 r += (r * l->surface.bevel_light_adjust) >> 8;
177 g = l->surface.primary->g;
178 g += (g * l->surface.bevel_light_adjust) >> 8;
179 b = l->surface.primary->b;
180 b += (b * l->surface.bevel_light_adjust) >> 8;
181 if (r > 0xFF) r = 0xFF;
182 if (g > 0xFF) g = 0xFF;
183 if (b > 0xFF) b = 0xFF;
184 g_assert(!l->surface.bevel_light);
185 l->surface.bevel_light = RrColorNew(l->inst, r, g, b);
186
187 /* dark color */
188 r = l->surface.primary->r;
189 r -= (r * l->surface.bevel_dark_adjust) >> 8;
190 g = l->surface.primary->g;
191 g -= (g * l->surface.bevel_dark_adjust) >> 8;
192 b = l->surface.primary->b;
193 b -= (b * l->surface.bevel_dark_adjust) >> 8;
194 g_assert(!l->surface.bevel_dark);
195 l->surface.bevel_dark = RrColorNew(l->inst, r, g, b);
196 }
197
198 static void gradient_parentrelative(RrAppearance *a, gint w, gint h)
199 {
200 RrPixel32 *source, *dest;
201 gint sw, sh, partial_w, partial_h, i;
202
203 g_assert (a->surface.parent);
204 g_assert (a->surface.parent->w);
205
206 sw = a->surface.parent->w;
207 sh = a->surface.parent->h;
208
209 /* This is a little hack. When a texture is parentrelative, and the same
210 area as the parent, and has a bevel, it will draw its bevel on top
211 of the parent's, amplifying it. So instead, rerender the child with
212 the parent's settings, but the child's bevel and interlace */
213 if (a->surface.relief != RR_RELIEF_FLAT &&
214 (a->surface.parent->surface.relief != RR_RELIEF_FLAT ||
215 a->surface.parent->surface.border) &&
216 !a->surface.parentx && !a->surface.parenty &&
217 sw == w && sh == h)
218 {
219 RrSurface old = a->surface;
220 a->surface = a->surface.parent->surface;
221
222 /* turn these off for the parent */
223 a->surface.relief = RR_RELIEF_FLAT;
224 a->surface.border = FALSE;
225
226 a->surface.pixel_data = old.pixel_data;
227
228 RrRender(a, w, h);
229 a->surface = old;
230 } else {
231 source = (a->surface.parent->surface.pixel_data +
232 a->surface.parentx + sw * a->surface.parenty);
233 dest = a->surface.pixel_data;
234
235 if (a->surface.parentx + w > sw) {
236 partial_w = sw - a->surface.parentx;
237 } else partial_w = w;
238
239 if (a->surface.parenty + h > sh) {
240 partial_h = sh - a->surface.parenty;
241 } else partial_h = h;
242
243 for (i = 0; i < partial_h; i++, source += sw, dest += w) {
244 memcpy(dest, source, partial_w * sizeof(RrPixel32));
245 }
246 }
247 }
248
249 static void gradient_solid(RrAppearance *l, gint w, gint h)
250 {
251 gint i;
252 RrPixel32 pix;
253 RrPixel32 *data = l->surface.pixel_data;
254 RrSurface *sp = &l->surface;
255 gint left = 0, top = 0, right = w - 1, bottom = h - 1;
256
257 pix = (sp->primary->r << RrDefaultRedOffset)
258 + (sp->primary->g << RrDefaultGreenOffset)
259 + (sp->primary->b << RrDefaultBlueOffset);
260
261 for (i = 0; i < w * h; i++)
262 *data++ = pix;
263
264 if (sp->interlaced)
265 return;
266
267 XFillRectangle(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->primary),
268 0, 0, w, h);
269
270 switch (sp->relief) {
271 case RR_RELIEF_RAISED:
272 if (!sp->bevel_dark)
273 create_bevel_colors(l);
274
275 switch (sp->bevel) {
276 case RR_BEVEL_1:
277 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
278 left, bottom, right, bottom);
279 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
280 right, bottom, right, top);
281
282 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
283 left, top, right, top);
284 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
285 left, bottom, left, top);
286 break;
287 case RR_BEVEL_2:
288 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
289 left + 2, bottom - 1, right - 2, bottom - 1);
290 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
291 right - 1, bottom - 1, right - 1, top + 1);
292
293 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
294 left + 2, top + 1, right - 2, top + 1);
295 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
296 left + 1, bottom - 1, left + 1, top + 1);
297 break;
298 default:
299 g_assert_not_reached(); /* unhandled BevelType */
300 }
301 break;
302 case RR_RELIEF_SUNKEN:
303 if (!sp->bevel_dark)
304 create_bevel_colors(l);
305
306 switch (sp->bevel) {
307 case RR_BEVEL_1:
308 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
309 left, bottom, right, bottom);
310 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
311 right, bottom, right, top);
312
313 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
314 left, top, right, top);
315 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
316 left, bottom, left, top);
317 break;
318 case RR_BEVEL_2:
319 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
320 left + 2, bottom - 1, right - 2, bottom - 1);
321 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
322 right - 1, bottom - 1, right - 1, top + 1);
323
324 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
325 left + 2, top + 1, right - 2, top + 1);
326 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
327 left + 1, bottom - 1, left + 1, top + 1);
328 break;
329 default:
330 g_assert_not_reached(); /* unhandled BevelType */
331 }
332 break;
333 case RR_RELIEF_FLAT:
334 if (sp->border) {
335 XDrawRectangle(RrDisplay(l->inst), l->pixmap,
336 RrColorGC(sp->border_color),
337 left, top, right, bottom);
338 }
339 break;
340 default:
341 g_assert_not_reached(); /* unhandled ReliefType */
342 }
343 }
344
345 /* * * * * * * * * * * * * * GRADIENT MAGIC WOOT * * * * * * * * * * * * * * */
346
347 #define VARS(x) \
348 guint color##x[3]; \
349 gint len##x, cdelta##x[3], error##x[3] = { 0, 0, 0 }, inc##x[3]; \
350 gboolean bigslope##x[3] /* color slope > 1 */
351
352 #define SETUP(x, from, to, w) \
353 len##x = w; \
354 \
355 color##x[0] = from->r; \
356 color##x[1] = from->g; \
357 color##x[2] = from->b; \
358 \
359 cdelta##x[0] = to->r - from->r; \
360 cdelta##x[1] = to->g - from->g; \
361 cdelta##x[2] = to->b - from->b; \
362 \
363 if (cdelta##x[0] < 0) { \
364 cdelta##x[0] = -cdelta##x[0]; \
365 inc##x[0] = -1; \
366 } else \
367 inc##x[0] = 1; \
368 if (cdelta##x[1] < 0) { \
369 cdelta##x[1] = -cdelta##x[1]; \
370 inc##x[1] = -1; \
371 } else \
372 inc##x[1] = 1; \
373 if (cdelta##x[2] < 0) { \
374 cdelta##x[2] = -cdelta##x[2]; \
375 inc##x[2] = -1; \
376 } else \
377 inc##x[2] = 1; \
378 bigslope##x[0] = cdelta##x[0] > w;\
379 bigslope##x[1] = cdelta##x[1] > w;\
380 bigslope##x[2] = cdelta##x[2] > w
381
382 #define COLOR_RR(x, c) \
383 c->r = color##x[0]; \
384 c->g = color##x[1]; \
385 c->b = color##x[2]
386
387 #define COLOR(x) \
388 ((color##x[0] << RrDefaultRedOffset) + \
389 (color##x[1] << RrDefaultGreenOffset) + \
390 (color##x[2] << RrDefaultBlueOffset))
391
392 #define INCREMENT(x, i) \
393 (inc##x[i])
394
395 #define NEXT(x) \
396 { \
397 gint i; \
398 for (i = 2; i >= 0; --i) { \
399 if (!cdelta##x[i]) continue; \
400 \
401 if (!bigslope##x[i]) { \
402 /* Y (color) is dependant on X */ \
403 error##x[i] += cdelta##x[i]; \
404 if ((error##x[i] << 1) >= len##x) { \
405 color##x[i] += INCREMENT(x, i); \
406 error##x[i] -= len##x; \
407 } \
408 } else { \
409 /* X is dependant on Y (color) */ \
410 while (1) { \
411 color##x[i] += INCREMENT(x, i); \
412 error##x[i] += len##x; \
413 if ((error##x[i] << 1) >= cdelta##x[i]) { \
414 error##x[i] -= cdelta##x[i]; \
415 break; \
416 } \
417 } \
418 } \
419 } \
420 }
421
422 static void gradient_splitvertical(RrAppearance *a, gint w, gint h)
423 {
424 gint x, y1, y2, y3;
425 RrSurface *sf = &a->surface;
426 RrPixel32 *data = sf->pixel_data;
427 RrPixel32 current;
428 gint y1sz, y2sz, y3sz;
429
430 VARS(y1);
431 VARS(y2);
432 VARS(y3);
433
434 /* if h <= 5, then a 0 or 1px middle gradient.
435 if h > 5, then always a 1px middle gradient.
436 */
437 if (h <= 5) {
438 y1sz = MAX(h/2, 0);
439 y2sz = (h < 3 ? 0 : h % 2);
440 y3sz = MAX(h/2, 1);
441 }
442 else {
443 y1sz = h/2 - (1 - (h % 2));
444 y2sz = 1;
445 y3sz = h/2;
446 }
447
448 SETUP(y1, sf->split_primary, sf->primary, y1sz);
449 if (y2sz) {
450 /* setup to get the colors _in between_ these other 2 */
451 SETUP(y2, sf->primary, sf->secondary, y2sz + 2);
452 NEXT(y2); /* skip the first one, its the same as the last of y1 */
453 }
454 SETUP(y3, sf->secondary, sf->split_secondary, y3sz);
455
456 for (y1 = y1sz; y1 > 0; --y1) {
457 current = COLOR(y1);
458 for (x = w - 1; x >= 0; --x)
459 *(data++) = current;
460
461 NEXT(y1);
462 }
463
464 for (y2 = y2sz; y2 > 0; --y2) {
465 current = COLOR(y2);
466 for (x = w - 1; x >= 0; --x)
467 *(data++) = current;
468
469 NEXT(y2);
470 }
471
472 for (y3 = y3sz; y3 > 0; --y3) {
473 current = COLOR(y3);
474 for (x = w - 1; x >= 0; --x)
475 *(data++) = current;
476
477 NEXT(y3);
478 }
479 }
480
481 static void gradient_horizontal(RrSurface *sf, gint w, gint h)
482 {
483 gint x, y;
484 RrPixel32 *data = sf->pixel_data, *datav;
485 RrPixel32 current;
486
487 VARS(x);
488 SETUP(x, sf->primary, sf->secondary, w);
489
490 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
491 current = COLOR(x);
492 datav = data;
493 for (y = h - 1; y >= 0; --y) { /* 0 -> h */
494 *datav = current;
495 datav += w;
496 }
497 ++data;
498
499 NEXT(x);
500 }
501 current = COLOR(x);
502 for (y = h - 1; y >= 0; --y) /* 0 -> h */
503 *(data + y * w) = current;
504 }
505
506 static void gradient_mirrorhorizontal(RrSurface *sf, gint w, gint h)
507 {
508 gint x, y;
509 RrPixel32 *data = sf->pixel_data, *datav;
510 RrPixel32 current;
511
512 VARS(x);
513 SETUP(x, sf->primary, sf->secondary, w/2);
514
515 if (w > 1) {
516 for (x = w - 1; x > w/2-1; --x) { /* 0 -> w-1 */
517 current = COLOR(x);
518 datav = data;
519 for (y = h - 1; y >= 0; --y) { /* 0 -> h */
520 *datav = current;
521 datav += w;
522 }
523 ++data;
524
525 NEXT(x);
526 }
527 SETUP(x, sf->secondary, sf->primary, w/2);
528 for (x = w/2 - 1; x > 0; --x) { /* 0 -> w-1 */
529 current = COLOR(x);
530 datav = data;
531 for (y = h - 1; y >= 0; --y) { /* 0 -> h */
532 *datav = current;
533 datav += w;
534 }
535 ++data;
536
537 NEXT(x);
538 }
539 }
540 current = COLOR(x);
541 for (y = h - 1; y >= 0; --y) /* 0 -> h */
542 *(data + y * w) = current;
543 }
544
545 static void gradient_vertical(RrSurface *sf, gint w, gint h)
546 {
547 gint x, y;
548 RrPixel32 *data = sf->pixel_data;
549 RrPixel32 current;
550
551 VARS(y);
552 SETUP(y, sf->primary, sf->secondary, h);
553
554 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
555 current = COLOR(y);
556 for (x = w - 1; x >= 0; --x) /* 0 -> w */
557 *(data++) = current;
558
559 NEXT(y);
560 }
561 current = COLOR(y);
562 for (x = w - 1; x >= 0; --x) /* 0 -> w */
563 *(data++) = current;
564 }
565
566
567 static void gradient_diagonal(RrSurface *sf, gint w, gint h)
568 {
569 gint x, y;
570 RrPixel32 *data = sf->pixel_data;
571 RrColor left, right;
572 RrColor extracorner;
573
574 VARS(lefty);
575 VARS(righty);
576 VARS(x);
577
578 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
579 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
580 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
581
582 SETUP(lefty, sf->primary, (&extracorner), h);
583 SETUP(righty, (&extracorner), sf->secondary, h);
584
585 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
586 COLOR_RR(lefty, (&left));
587 COLOR_RR(righty, (&right));
588
589 SETUP(x, (&left), (&right), w);
590
591 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
592 *(data++) = COLOR(x);
593
594 NEXT(x);
595 }
596 *(data++) = COLOR(x);
597
598 NEXT(lefty);
599 NEXT(righty);
600 }
601 COLOR_RR(lefty, (&left));
602 COLOR_RR(righty, (&right));
603
604 SETUP(x, (&left), (&right), w);
605
606 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
607 *(data++) = COLOR(x);
608
609 NEXT(x);
610 }
611 *data = COLOR(x);
612 }
613
614 static void gradient_crossdiagonal(RrSurface *sf, gint w, gint h)
615 {
616 gint x, y;
617 RrPixel32 *data = sf->pixel_data;
618 RrColor left, right;
619 RrColor extracorner;
620
621 VARS(lefty);
622 VARS(righty);
623 VARS(x);
624
625 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
626 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
627 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
628
629 SETUP(lefty, (&extracorner), sf->secondary, h);
630 SETUP(righty, sf->primary, (&extracorner), h);
631
632 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
633 COLOR_RR(lefty, (&left));
634 COLOR_RR(righty, (&right));
635
636 SETUP(x, (&left), (&right), w);
637
638 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
639 *(data++) = COLOR(x);
640
641 NEXT(x);
642 }
643 *(data++) = COLOR(x);
644
645 NEXT(lefty);
646 NEXT(righty);
647 }
648 COLOR_RR(lefty, (&left));
649 COLOR_RR(righty, (&right));
650
651 SETUP(x, (&left), (&right), w);
652
653 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
654 *(data++) = COLOR(x);
655
656 NEXT(x);
657 }
658 *data = COLOR(x);
659 }
660
661 static void gradient_pyramid(RrSurface *sf, gint inw, gint inh)
662 {
663 gint x, y, w = (inw >> 1) + 1, h = (inh >> 1) + 1;
664 RrPixel32 *data = sf->pixel_data;
665 RrPixel32 *end = data + inw*inh - 1;
666 RrPixel32 current;
667 RrColor left, right;
668 RrColor extracorner;
669
670 VARS(lefty);
671 VARS(righty);
672 VARS(x);
673
674 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
675 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
676 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
677
678 SETUP(lefty, (&extracorner), sf->secondary, h);
679 SETUP(righty, sf->primary, (&extracorner), h);
680
681 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
682 COLOR_RR(lefty, (&left));
683 COLOR_RR(righty, (&right));
684
685 SETUP(x, (&left), (&right), w);
686
687 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
688 current = COLOR(x);
689 *(data+x) = current;
690 *(data+inw-x) = current;
691 *(end-x) = current;
692 *(end-(inw-x)) = current;
693
694 NEXT(x);
695 }
696 current = COLOR(x);
697 *(data+x) = current;
698 *(data+inw-x) = current;
699 *(end-x) = current;
700 *(end-(inw-x)) = current;
701
702 data+=inw;
703 end-=inw;
704
705 NEXT(lefty);
706 NEXT(righty);
707 }
708 COLOR_RR(lefty, (&left));
709 COLOR_RR(righty, (&right));
710
711 SETUP(x, (&left), (&right), w);
712
713 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
714 current = COLOR(x);
715 *(data+x) = current;
716 *(data+inw-x) = current;
717 *(end-x) = current;
718 *(end-(inw-x)) = current;
719
720 NEXT(x);
721 }
722 current = COLOR(x);
723 *(data+x) = current;
724 *(data+inw-x) = current;
725 *(end-x) = current;
726 *(end-(inw-x)) = current;
727 }
728
my patches for the openbox window manager
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