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use memcpy's to speed up vertical gradients too. split the fancy memcpy() code out...
[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 /*! Repeat the first pixel over the entire block of memory
201 @param start The block of memory. start[0] will be copied
202 to the rest of the block.
203 @param w The width of the block of memory (including the already-set first
204 element
205 */
206 static inline void repeat_pixel(RrPixel32 *start, gint w)
207 {
208 gint x;
209 RrPixel32 *dest;
210
211 dest = start + 1;
212
213 /* for really small things, just copy ourselves */
214 if (w < 8) {
215 for (x = w-1; x > 0; --x)
216 *(dest++) = *start;
217 }
218
219 /* for >= 8, then use O(log n) memcpy's... */
220 else {
221 gint len = 4;
222 gint lenbytes = 4 * sizeof(RrPixel32);
223
224 /* copy the first 3 * 32 bits (3 words) ourselves - then we have
225 3 + the original 1 = 4 words to make copies of at a time
226
227 this is faster than doing memcpy for 1 or 2 words at a time
228 */
229 for (x = 3; x > 0; --x)
230 *(dest++) = *start;
231
232 for (x = w - 4; x > 0;) {
233 memcpy(dest, start, lenbytes);
234 x -= len;
235 dest += len;
236 len <<= 1;
237 lenbytes <<= 1;
238 if (len > x) {
239 len = x;
240 lenbytes = x * sizeof(RrPixel32);
241 }
242 }
243 }
244 }
245
246 static void gradient_parentrelative(RrAppearance *a, gint w, gint h)
247 {
248 RrPixel32 *source, *dest;
249 gint sw, sh, partial_w, partial_h, i;
250
251 g_assert (a->surface.parent);
252 g_assert (a->surface.parent->w);
253
254 sw = a->surface.parent->w;
255 sh = a->surface.parent->h;
256
257 /* This is a little hack. When a texture is parentrelative, and the same
258 area as the parent, and has a bevel, it will draw its bevel on top
259 of the parent's, amplifying it. So instead, rerender the child with
260 the parent's settings, but the child's bevel and interlace */
261 if (a->surface.relief != RR_RELIEF_FLAT &&
262 (a->surface.parent->surface.relief != RR_RELIEF_FLAT ||
263 a->surface.parent->surface.border) &&
264 !a->surface.parentx && !a->surface.parenty &&
265 sw == w && sh == h)
266 {
267 RrSurface old = a->surface;
268 a->surface = a->surface.parent->surface;
269
270 /* turn these off for the parent */
271 a->surface.relief = RR_RELIEF_FLAT;
272 a->surface.border = FALSE;
273
274 a->surface.pixel_data = old.pixel_data;
275
276 RrRender(a, w, h);
277 a->surface = old;
278 } else {
279 source = (a->surface.parent->surface.pixel_data +
280 a->surface.parentx + sw * a->surface.parenty);
281 dest = a->surface.pixel_data;
282
283 if (a->surface.parentx + w > sw) {
284 partial_w = sw - a->surface.parentx;
285 } else partial_w = w;
286
287 if (a->surface.parenty + h > sh) {
288 partial_h = sh - a->surface.parenty;
289 } else partial_h = h;
290
291 for (i = 0; i < partial_h; i++, source += sw, dest += w) {
292 memcpy(dest, source, partial_w * sizeof(RrPixel32));
293 }
294 }
295 }
296
297 static void gradient_solid(RrAppearance *l, gint w, gint h)
298 {
299 gint i;
300 RrPixel32 pix;
301 RrPixel32 *data = l->surface.pixel_data;
302 RrSurface *sp = &l->surface;
303 gint left = 0, top = 0, right = w - 1, bottom = h - 1;
304
305 pix = (sp->primary->r << RrDefaultRedOffset)
306 + (sp->primary->g << RrDefaultGreenOffset)
307 + (sp->primary->b << RrDefaultBlueOffset);
308
309 for (i = 0; i < w * h; i++)
310 *data++ = pix;
311
312 if (sp->interlaced)
313 return;
314
315 XFillRectangle(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->primary),
316 0, 0, w, h);
317
318 switch (sp->relief) {
319 case RR_RELIEF_RAISED:
320 if (!sp->bevel_dark)
321 create_bevel_colors(l);
322
323 switch (sp->bevel) {
324 case RR_BEVEL_1:
325 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
326 left, bottom, right, bottom);
327 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
328 right, bottom, right, top);
329
330 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
331 left, top, right, top);
332 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
333 left, bottom, left, top);
334 break;
335 case RR_BEVEL_2:
336 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
337 left + 2, bottom - 1, right - 2, bottom - 1);
338 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
339 right - 1, bottom - 1, right - 1, top + 1);
340
341 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
342 left + 2, top + 1, right - 2, top + 1);
343 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
344 left + 1, bottom - 1, left + 1, top + 1);
345 break;
346 default:
347 g_assert_not_reached(); /* unhandled BevelType */
348 }
349 break;
350 case RR_RELIEF_SUNKEN:
351 if (!sp->bevel_dark)
352 create_bevel_colors(l);
353
354 switch (sp->bevel) {
355 case RR_BEVEL_1:
356 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
357 left, bottom, right, bottom);
358 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
359 right, bottom, right, top);
360
361 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
362 left, top, right, top);
363 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
364 left, bottom, left, top);
365 break;
366 case RR_BEVEL_2:
367 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
368 left + 2, bottom - 1, right - 2, bottom - 1);
369 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
370 right - 1, bottom - 1, right - 1, top + 1);
371
372 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
373 left + 2, top + 1, right - 2, top + 1);
374 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
375 left + 1, bottom - 1, left + 1, top + 1);
376 break;
377 default:
378 g_assert_not_reached(); /* unhandled BevelType */
379 }
380 break;
381 case RR_RELIEF_FLAT:
382 if (sp->border) {
383 XDrawRectangle(RrDisplay(l->inst), l->pixmap,
384 RrColorGC(sp->border_color),
385 left, top, right, bottom);
386 }
387 break;
388 default:
389 g_assert_not_reached(); /* unhandled ReliefType */
390 }
391 }
392
393 /* * * * * * * * * * * * * * GRADIENT MAGIC WOOT * * * * * * * * * * * * * * */
394
395 #define VARS(x) \
396 guint color##x[3]; \
397 gint len##x, cdelta##x[3], error##x[3] = { 0, 0, 0 }, inc##x[3]; \
398 gboolean bigslope##x[3] /* color slope > 1 */
399
400 #define SETUP(x, from, to, w) \
401 len##x = w; \
402 \
403 color##x[0] = from->r; \
404 color##x[1] = from->g; \
405 color##x[2] = from->b; \
406 \
407 cdelta##x[0] = to->r - from->r; \
408 cdelta##x[1] = to->g - from->g; \
409 cdelta##x[2] = to->b - from->b; \
410 \
411 if (cdelta##x[0] < 0) { \
412 cdelta##x[0] = -cdelta##x[0]; \
413 inc##x[0] = -1; \
414 } else \
415 inc##x[0] = 1; \
416 if (cdelta##x[1] < 0) { \
417 cdelta##x[1] = -cdelta##x[1]; \
418 inc##x[1] = -1; \
419 } else \
420 inc##x[1] = 1; \
421 if (cdelta##x[2] < 0) { \
422 cdelta##x[2] = -cdelta##x[2]; \
423 inc##x[2] = -1; \
424 } else \
425 inc##x[2] = 1; \
426 bigslope##x[0] = cdelta##x[0] > w;\
427 bigslope##x[1] = cdelta##x[1] > w;\
428 bigslope##x[2] = cdelta##x[2] > w
429
430 #define COLOR_RR(x, c) \
431 c->r = color##x[0]; \
432 c->g = color##x[1]; \
433 c->b = color##x[2]
434
435 #define COLOR(x) \
436 ((color##x[0] << RrDefaultRedOffset) + \
437 (color##x[1] << RrDefaultGreenOffset) + \
438 (color##x[2] << RrDefaultBlueOffset))
439
440 #define INCREMENT(x, i) \
441 (inc##x[i])
442
443 #define NEXT(x) \
444 { \
445 gint i; \
446 for (i = 2; i >= 0; --i) { \
447 if (!cdelta##x[i]) continue; \
448 \
449 if (!bigslope##x[i]) { \
450 /* Y (color) is dependant on X */ \
451 error##x[i] += cdelta##x[i]; \
452 if ((error##x[i] << 1) >= len##x) { \
453 color##x[i] += INCREMENT(x, i); \
454 error##x[i] -= len##x; \
455 } \
456 } else { \
457 /* X is dependant on Y (color) */ \
458 while (1) { \
459 color##x[i] += INCREMENT(x, i); \
460 error##x[i] += len##x; \
461 if ((error##x[i] << 1) >= cdelta##x[i]) { \
462 error##x[i] -= cdelta##x[i]; \
463 break; \
464 } \
465 } \
466 } \
467 } \
468 }
469
470 static void gradient_splitvertical(RrAppearance *a, gint w, gint h)
471 {
472 gint y1, y2, y3;
473 RrSurface *sf = &a->surface;
474 RrPixel32 *data;
475 gint y1sz, y2sz, y3sz;
476
477 VARS(y1);
478 VARS(y2);
479 VARS(y3);
480
481 /* if h <= 5, then a 0 or 1px middle gradient.
482 if h > 5, then always a 1px middle gradient.
483 */
484 if (h <= 5) {
485 y1sz = MAX(h/2, 0);
486 y2sz = (h < 3 ? 0 : h % 2);
487 y3sz = MAX(h/2, 1);
488 }
489 else {
490 y1sz = h/2 - (1 - (h % 2));
491 y2sz = 1;
492 y3sz = h/2;
493 }
494
495 SETUP(y1, sf->split_primary, sf->primary, y1sz);
496 if (y2sz) {
497 /* setup to get the colors _in between_ these other 2 */
498 SETUP(y2, sf->primary, sf->secondary, y2sz + 2);
499 NEXT(y2); /* skip the first one, its the same as the last of y1 */
500 }
501 SETUP(y3, sf->secondary, sf->split_secondary, y3sz);
502
503 /* find the color for the first pixel of each row first */
504 data = sf->pixel_data;
505
506 for (y1 = y1sz-1; y1 > 0; --y1) {
507 *data = COLOR(y1);
508 data += w;
509 NEXT(y1);
510 }
511 *data = COLOR(y1);
512 data += w;
513 for (y2 = y2sz-1; y2 > 0; --y2) {
514 *data = COLOR(y2);
515 data += w;
516 NEXT(y2);
517 }
518 *data = COLOR(y2);
519 data += w;
520 for (y3 = y3sz-1; y3 > 0; --y3) {
521 *data = COLOR(y3);
522 data += w;
523 NEXT(y3);
524 }
525 *data = COLOR(y3);
526
527 /* copy the first pixels into the whole rows */
528 data = sf->pixel_data;
529 for (y1 = h; y1 > 0; --y1) {
530 repeat_pixel(data, w);
531 data += w;
532 }
533 }
534
535 static void gradient_horizontal(RrSurface *sf, gint w, gint h)
536 {
537 gint x, y;
538 RrPixel32 *data = sf->pixel_data, *datav;
539
540 VARS(x);
541 SETUP(x, sf->primary, sf->secondary, w);
542
543 datav = data;
544 for (x = w - 1; x > 0; --x) { /* 0 -> w - 1 */
545 *datav = COLOR(x);
546 ++datav;
547 NEXT(x);
548 }
549 *datav = COLOR(x);
550 ++datav;
551
552 for (y = h - 1; y > 0; --y) { /* 1 -> h */
553 memcpy(datav, data, w * sizeof(RrPixel32));
554 datav += w;
555 }
556 }
557
558 static void gradient_mirrorhorizontal(RrSurface *sf, gint w, gint h)
559 {
560 gint x, y, half1, half2;
561 RrPixel32 *data = sf->pixel_data, *datav;
562
563 VARS(x);
564
565 half1 = (w + 1) / 2;
566 half2 = w / 2;
567
568 SETUP(x, sf->primary, sf->secondary, half1);
569 datav = data;
570 for (x = half1 - 1; x > 0; --x) { /* 0 -> half1 - 1 */
571 *datav = COLOR(x);
572 ++datav;
573 NEXT(x);
574 }
575 *datav = COLOR(x);
576 ++datav;
577
578 if (half2 > 0) {
579 SETUP(x, sf->secondary, sf->primary, half2);
580 for (x = half2 - 1; x > 0; --x) { /* 0 -> half2 - 1 */
581 *datav = COLOR(x);
582 ++datav;
583 NEXT(x);
584 }
585 *datav = COLOR(x);
586 ++datav;
587 }
588
589 for (y = h - 1; y > 0; --y) { /* 1 -> h */
590 memcpy(datav, data, w * sizeof(RrPixel32));
591 datav += w;
592 }
593 }
594
595 static void gradient_vertical(RrSurface *sf, gint w, gint h)
596 {
597 gint y;
598 RrPixel32 *data;
599
600 VARS(y);
601 SETUP(y, sf->primary, sf->secondary, h);
602
603 /* find the color for the first pixel of each row first */
604 data = sf->pixel_data;
605
606 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
607 *data = COLOR(y);
608 data += w;
609 NEXT(y);
610 }
611 *data = COLOR(y);
612
613 /* copy the first pixels into the whole rows */
614 data = sf->pixel_data;
615 for (y = h; y > 0; --y) {
616 repeat_pixel(data, w);
617 data += w;
618 }
619 }
620
621
622 static void gradient_diagonal(RrSurface *sf, gint w, gint h)
623 {
624 gint x, y;
625 RrPixel32 *data = sf->pixel_data;
626 RrColor left, right;
627 RrColor extracorner;
628
629 VARS(lefty);
630 VARS(righty);
631 VARS(x);
632
633 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
634 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
635 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
636
637 SETUP(lefty, sf->primary, (&extracorner), h);
638 SETUP(righty, (&extracorner), sf->secondary, h);
639
640 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
641 COLOR_RR(lefty, (&left));
642 COLOR_RR(righty, (&right));
643
644 SETUP(x, (&left), (&right), w);
645
646 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
647 *(data++) = COLOR(x);
648
649 NEXT(x);
650 }
651 *(data++) = COLOR(x);
652
653 NEXT(lefty);
654 NEXT(righty);
655 }
656 COLOR_RR(lefty, (&left));
657 COLOR_RR(righty, (&right));
658
659 SETUP(x, (&left), (&right), w);
660
661 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
662 *(data++) = COLOR(x);
663
664 NEXT(x);
665 }
666 *data = COLOR(x);
667 }
668
669 static void gradient_crossdiagonal(RrSurface *sf, gint w, gint h)
670 {
671 gint x, y;
672 RrPixel32 *data = sf->pixel_data;
673 RrColor left, right;
674 RrColor extracorner;
675
676 VARS(lefty);
677 VARS(righty);
678 VARS(x);
679
680 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
681 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
682 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
683
684 SETUP(lefty, (&extracorner), sf->secondary, h);
685 SETUP(righty, sf->primary, (&extracorner), h);
686
687 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
688 COLOR_RR(lefty, (&left));
689 COLOR_RR(righty, (&right));
690
691 SETUP(x, (&left), (&right), w);
692
693 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
694 *(data++) = COLOR(x);
695
696 NEXT(x);
697 }
698 *(data++) = COLOR(x);
699
700 NEXT(lefty);
701 NEXT(righty);
702 }
703 COLOR_RR(lefty, (&left));
704 COLOR_RR(righty, (&right));
705
706 SETUP(x, (&left), (&right), w);
707
708 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
709 *(data++) = COLOR(x);
710
711 NEXT(x);
712 }
713 *data = COLOR(x);
714 }
715
716 static void gradient_pyramid(RrSurface *sf, gint inw, gint inh)
717 {
718 gint x, y, w = (inw >> 1) + 1, h = (inh >> 1) + 1;
719 RrPixel32 *data = sf->pixel_data;
720 RrPixel32 *end = data + inw*inh - 1;
721 RrPixel32 current;
722 RrColor left, right;
723 RrColor extracorner;
724
725 VARS(lefty);
726 VARS(righty);
727 VARS(x);
728
729 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
730 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
731 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
732
733 SETUP(lefty, (&extracorner), sf->secondary, h);
734 SETUP(righty, sf->primary, (&extracorner), h);
735
736 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
737 COLOR_RR(lefty, (&left));
738 COLOR_RR(righty, (&right));
739
740 SETUP(x, (&left), (&right), w);
741
742 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
743 current = COLOR(x);
744 *(data+x) = current;
745 *(data+inw-x) = current;
746 *(end-x) = current;
747 *(end-(inw-x)) = current;
748
749 NEXT(x);
750 }
751 current = COLOR(x);
752 *(data+x) = current;
753 *(data+inw-x) = current;
754 *(end-x) = current;
755 *(end-(inw-x)) = current;
756
757 data+=inw;
758 end-=inw;
759
760 NEXT(lefty);
761 NEXT(righty);
762 }
763 COLOR_RR(lefty, (&left));
764 COLOR_RR(righty, (&right));
765
766 SETUP(x, (&left), (&right), w);
767
768 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
769 current = COLOR(x);
770 *(data+x) = current;
771 *(data+inw-x) = current;
772 *(end-x) = current;
773 *(end-(inw-x)) = current;
774
775 NEXT(x);
776 }
777 current = COLOR(x);
778 *(data+x) = current;
779 *(data+inw-x) = current;
780 *(end-x) = current;
781 *(end-(inw-x)) = current;
782 }
783
my patches for the openbox window manager
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