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[chaz/openbox] / render / gradient.c
1 #include "render.h"
2 #include "gradient.h"
3 #include "color.h"
4 #include <glib.h>
5
6 static void highlight(RrPixel32 *x, RrPixel32 *y, gboolean raised);
7 static void gradient_solid(RrAppearance *l, int w, int h);
8 static void gradient_vertical(RrSurface *sf, int w, int h);
9 static void gradient_horizontal(RrSurface *sf, int w, int h);
10 static void gradient_diagonal(RrSurface *sf, int w, int h);
11 static void gradient_crossdiagonal(RrSurface *sf, int w, int h);
12 static void gradient_pyramid(RrSurface *sf, int inw, int inh);
13
14 void RrRender(RrAppearance *a, int w, int h)
15 {
16 RrPixel32 *data = a->surface.pixel_data;
17 RrPixel32 current;
18 unsigned int r,g,b;
19 int off, x;
20
21 switch (a->surface.grad) {
22 case RR_SURFACE_SOLID:
23 gradient_solid(a, w, h);
24 break;
25 case RR_SURFACE_VERTICAL:
26 gradient_vertical(&a->surface, w, h);
27 break;
28 case RR_SURFACE_HORIZONTAL:
29 gradient_horizontal(&a->surface, w, h);
30 break;
31 case RR_SURFACE_DIAGONAL:
32 gradient_diagonal(&a->surface, w, h);
33 break;
34 case RR_SURFACE_CROSS_DIAGONAL:
35 gradient_crossdiagonal(&a->surface, w, h);
36 break;
37 case RR_SURFACE_PYRAMID:
38 gradient_pyramid(&a->surface, w, h);
39 break;
40 default:
41 g_assert_not_reached(); /* unhandled gradient */
42 return;
43 }
44
45 if (a->surface.interlaced) {
46 int i;
47 RrPixel32 *p;
48
49 r = a->surface.interlace_color->r;
50 g = a->surface.interlace_color->g;
51 b = a->surface.interlace_color->b;
52 current = (r << RrDefaultRedOffset)
53 + (g << RrDefaultGreenOffset)
54 + (b << RrDefaultBlueOffset);
55 p = data;
56 for (i = 0; i < h; i += 2, p += w)
57 for (x = 0; x < w; ++x, ++p)
58 *p = current;
59 }
60
61 if (a->surface.relief == RR_RELIEF_FLAT && a->surface.border) {
62 r = a->surface.border_color->r;
63 g = a->surface.border_color->g;
64 b = a->surface.border_color->b;
65 current = (r << RrDefaultRedOffset)
66 + (g << RrDefaultGreenOffset)
67 + (b << RrDefaultBlueOffset);
68 for (off = 0, x = 0; x < w; ++x, off++) {
69 *(data + off) = current;
70 *(data + off + ((h-1) * w)) = current;
71 }
72 for (off = 0, x = 0; x < h; ++x, off++) {
73 *(data + (off * w)) = current;
74 *(data + (off * w) + w - 1) = current;
75 }
76 }
77
78 if (a->surface.relief != RR_RELIEF_FLAT) {
79 if (a->surface.bevel == RR_BEVEL_1) {
80 for (off = 1, x = 1; x < w - 1; ++x, off++)
81 highlight(data + off,
82 data + off + (h-1) * w,
83 a->surface.relief==RR_RELIEF_RAISED);
84 for (off = 0, x = 0; x < h; ++x, off++)
85 highlight(data + off * w,
86 data + off * w + w - 1,
87 a->surface.relief==RR_RELIEF_RAISED);
88 }
89
90 if (a->surface.bevel == RR_BEVEL_2) {
91 for (off = 2, x = 2; x < w - 2; ++x, off++)
92 highlight(data + off + w,
93 data + off + (h-2) * w,
94 a->surface.relief==RR_RELIEF_RAISED);
95 for (off = 1, x = 1; x < h-1; ++x, off++)
96 highlight(data + off * w + 1,
97 data + off * w + w - 2,
98 a->surface.relief==RR_RELIEF_RAISED);
99 }
100 }
101 }
102
103 static void highlight(RrPixel32 *x, RrPixel32 *y, gboolean raised)
104 {
105 int r, g, b;
106
107 RrPixel32 *up, *down;
108 if (raised) {
109 up = x;
110 down = y;
111 } else {
112 up = y;
113 down = x;
114 }
115 r = (*up >> RrDefaultRedOffset) & 0xFF;
116 r += r >> 1;
117 g = (*up >> RrDefaultGreenOffset) & 0xFF;
118 g += g >> 1;
119 b = (*up >> RrDefaultBlueOffset) & 0xFF;
120 b += b >> 1;
121 if (r > 0xFF) r = 0xFF;
122 if (g > 0xFF) g = 0xFF;
123 if (b > 0xFF) b = 0xFF;
124 *up = (r << RrDefaultRedOffset) + (g << RrDefaultGreenOffset)
125 + (b << RrDefaultBlueOffset);
126
127 r = (*down >> RrDefaultRedOffset) & 0xFF;
128 r = (r >> 1) + (r >> 2);
129 g = (*down >> RrDefaultGreenOffset) & 0xFF;
130 g = (g >> 1) + (g >> 2);
131 b = (*down >> RrDefaultBlueOffset) & 0xFF;
132 b = (b >> 1) + (b >> 2);
133 *down = (r << RrDefaultRedOffset) + (g << RrDefaultGreenOffset)
134 + (b << RrDefaultBlueOffset);
135 }
136
137 static void create_bevel_colors(RrAppearance *l)
138 {
139 int r, g, b;
140
141 /* light color */
142 r = l->surface.primary->r;
143 r += r >> 1;
144 g = l->surface.primary->g;
145 g += g >> 1;
146 b = l->surface.primary->b;
147 b += b >> 1;
148 if (r > 0xFF) r = 0xFF;
149 if (g > 0xFF) g = 0xFF;
150 if (b > 0xFF) b = 0xFF;
151 g_assert(!l->surface.bevel_light);
152 l->surface.bevel_light = RrColorNew(l->inst, r, g, b);
153
154 /* dark color */
155 r = l->surface.primary->r;
156 r = (r >> 1) + (r >> 2);
157 g = l->surface.primary->g;
158 g = (g >> 1) + (g >> 2);
159 b = l->surface.primary->b;
160 b = (b >> 1) + (b >> 2);
161 g_assert(!l->surface.bevel_dark);
162 l->surface.bevel_dark = RrColorNew(l->inst, r, g, b);
163 }
164
165 static void gradient_solid(RrAppearance *l, int w, int h)
166 {
167 RrPixel32 pix;
168 int i, a, b;
169 RrSurface *sp = &l->surface;
170 int left = 0, top = 0, right = w - 1, bottom = h - 1;
171
172 pix = (sp->primary->r << RrDefaultRedOffset)
173 + (sp->primary->g << RrDefaultGreenOffset)
174 + (sp->primary->b << RrDefaultBlueOffset);
175
176 for (a = 0; a < w; a++)
177 for (b = 0; b < h; b++)
178 sp->pixel_data[a + b * w] = pix;
179
180 XFillRectangle(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->primary),
181 0, 0, w, h);
182
183 if (sp->interlaced) {
184 for (i = 0; i < h; i += 2)
185 XDrawLine(RrDisplay(l->inst), l->pixmap,
186 RrColorGC(sp->interlace_color),
187 0, i, w, i);
188 }
189
190 switch (sp->relief) {
191 case RR_RELIEF_RAISED:
192 if (!sp->bevel_dark)
193 create_bevel_colors(l);
194
195 switch (sp->bevel) {
196 case RR_BEVEL_1:
197 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
198 left, bottom, right, bottom);
199 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
200 right, bottom, right, top);
201
202 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
203 left, top, right, top);
204 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
205 left, bottom, left, top);
206 break;
207 case RR_BEVEL_2:
208 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
209 left + 1, bottom - 2, right - 2, bottom - 2);
210 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
211 right - 2, bottom - 2, right - 2, top + 1);
212
213 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
214 left + 1, top + 1, right - 2, top + 1);
215 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
216 left + 1, bottom - 2, left + 1, top + 1);
217 break;
218 default:
219 g_assert_not_reached(); /* unhandled BevelType */
220 }
221 break;
222 case RR_RELIEF_SUNKEN:
223 if (!sp->bevel_dark)
224 create_bevel_colors(l);
225
226 switch (sp->bevel) {
227 case RR_BEVEL_1:
228 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
229 left, bottom, right, bottom);
230 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
231 right, bottom, right, top);
232
233 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
234 left, top, right, top);
235 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
236 left, bottom, left, top);
237 break;
238 case RR_BEVEL_2:
239 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
240 left + 1, bottom - 2, right - 2, bottom - 2);
241 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
242 right - 2, bottom - 2, right - 2, top + 1);
243
244 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
245 left + 1, top + 1, right - 2, top + 1);
246 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
247 left + 1, bottom - 2, left + 1, top + 1);
248
249 break;
250 default:
251 g_assert_not_reached(); /* unhandled BevelType */
252 }
253 break;
254 case RR_RELIEF_FLAT:
255 if (sp->border) {
256 XDrawRectangle(RrDisplay(l->inst), l->pixmap,
257 RrColorGC(sp->border_color),
258 left, top, right, bottom);
259 }
260 break;
261 default:
262 g_assert_not_reached(); /* unhandled ReliefType */
263 }
264 }
265
266 /* * * * * * * * * * * * * * GRADIENT MAGIC WOOT * * * * * * * * * * * * * * */
267
268 #define VARS(x) \
269 unsigned int color##x[3]; \
270 int len##x, cdelta##x[3], error##x[3] = { 0, 0, 0 }, inc##x[3]; \
271 gboolean bigslope##x[3] /* color slope > 1 */
272
273 #define SETUP(x, from, to, w) \
274 len##x = w; \
275 \
276 color##x[0] = from->r; \
277 color##x[1] = from->g; \
278 color##x[2] = from->b; \
279 \
280 cdelta##x[0] = to->r - from->r; \
281 cdelta##x[1] = to->g - from->g; \
282 cdelta##x[2] = to->b - from->b; \
283 \
284 if (cdelta##x[0] < 0) { \
285 cdelta##x[0] = -cdelta##x[0]; \
286 inc##x[0] = -1; \
287 } else \
288 inc##x[0] = 1; \
289 if (cdelta##x[1] < 0) { \
290 cdelta##x[1] = -cdelta##x[1]; \
291 inc##x[1] = -1; \
292 } else \
293 inc##x[1] = 1; \
294 if (cdelta##x[2] < 0) { \
295 cdelta##x[2] = -cdelta##x[2]; \
296 inc##x[2] = -1; \
297 } else \
298 inc##x[2] = 1; \
299 bigslope##x[0] = cdelta##x[0] > w;\
300 bigslope##x[1] = cdelta##x[1] > w;\
301 bigslope##x[2] = cdelta##x[2] > w
302
303 #define COLOR_RR(x, c) \
304 c->r = color##x[0]; \
305 c->g = color##x[1]; \
306 c->b = color##x[2]
307
308 #define COLOR(x) \
309 ((color##x[0] << RrDefaultRedOffset) + \
310 (color##x[1] << RrDefaultGreenOffset) + \
311 (color##x[2] << RrDefaultBlueOffset))
312
313 #define INCREMENT(x, i) \
314 (inc##x[i])
315
316 #define NEXT(x) \
317 { \
318 int i; \
319 for (i = 2; i >= 0; --i) { \
320 if (!cdelta##x[i]) continue; \
321 \
322 if (!bigslope##x[i]) { \
323 /* Y (color) is dependant on X */ \
324 error##x[i] += cdelta##x[i]; \
325 if ((error##x[i] << 1) >= len##x) { \
326 color##x[i] += INCREMENT(x, i); \
327 error##x[i] -= len##x; \
328 } \
329 } else { \
330 /* X is dependant on Y (color) */ \
331 while (1) { \
332 color##x[i] += INCREMENT(x, i); \
333 error##x[i] += len##x; \
334 if ((error##x[i] << 1) >= cdelta##x[i]) { \
335 error##x[i] -= cdelta##x[i]; \
336 break; \
337 } \
338 } \
339 } \
340 } \
341 }
342
343 static void gradient_horizontal(RrSurface *sf, int w, int h)
344 {
345 int x, y;
346 RrPixel32 *data = sf->pixel_data, *datav;
347 RrPixel32 current;
348
349 VARS(x);
350 SETUP(x, sf->primary, sf->secondary, w);
351
352 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
353 current = COLOR(x);
354 datav = data;
355 for (y = h - 1; y >= 0; --y) { /* 0 -> h */
356 *datav = current;
357 datav += w;
358 }
359 ++data;
360
361 NEXT(x);
362 }
363 current = COLOR(x);
364 for (y = h - 1; y >= 0; --y) /* 0 -> h */
365 *(data + y * w) = current;
366 }
367
368 static void gradient_vertical(RrSurface *sf, int w, int h)
369 {
370 int x, y;
371 RrPixel32 *data = sf->pixel_data;
372 RrPixel32 current;
373
374 VARS(y);
375 SETUP(y, sf->primary, sf->secondary, h);
376
377 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
378 current = COLOR(y);
379 for (x = w - 1; x >= 0; --x) /* 0 -> w */
380 *(data++) = current;
381
382 NEXT(y);
383 }
384 current = COLOR(y);
385 for (x = w - 1; x >= 0; --x) /* 0 -> w */
386 *(data++) = current;
387 }
388
389
390 static void gradient_diagonal(RrSurface *sf, int w, int h)
391 {
392 int x, y;
393 RrPixel32 *data = sf->pixel_data;
394 RrColor left, right;
395 RrColor extracorner;
396
397 VARS(lefty);
398 VARS(righty);
399 VARS(x);
400
401 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
402 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
403 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
404
405 SETUP(lefty, sf->primary, (&extracorner), h);
406 SETUP(righty, (&extracorner), sf->secondary, h);
407
408 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
409 COLOR_RR(lefty, (&left));
410 COLOR_RR(righty, (&right));
411
412 SETUP(x, (&left), (&right), w);
413
414 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
415 *(data++) = COLOR(x);
416
417 NEXT(x);
418 }
419 *(data++) = COLOR(x);
420
421 NEXT(lefty);
422 NEXT(righty);
423 }
424 COLOR_RR(lefty, (&left));
425 COLOR_RR(righty, (&right));
426
427 SETUP(x, (&left), (&right), w);
428
429 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
430 *(data++) = COLOR(x);
431
432 NEXT(x);
433 }
434 *data = COLOR(x);
435 }
436
437 static void gradient_crossdiagonal(RrSurface *sf, int w, int h)
438 {
439 int x, y;
440 RrPixel32 *data = sf->pixel_data;
441 RrColor left, right;
442 RrColor extracorner;
443
444 VARS(lefty);
445 VARS(righty);
446 VARS(x);
447
448 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
449 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
450 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
451
452 SETUP(lefty, (&extracorner), sf->secondary, h);
453 SETUP(righty, sf->primary, (&extracorner), h);
454
455 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
456 COLOR_RR(lefty, (&left));
457 COLOR_RR(righty, (&right));
458
459 SETUP(x, (&left), (&right), w);
460
461 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
462 *(data++) = COLOR(x);
463
464 NEXT(x);
465 }
466 *(data++) = COLOR(x);
467
468 NEXT(lefty);
469 NEXT(righty);
470 }
471 COLOR_RR(lefty, (&left));
472 COLOR_RR(righty, (&right));
473
474 SETUP(x, (&left), (&right), w);
475
476 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
477 *(data++) = COLOR(x);
478
479 NEXT(x);
480 }
481 *data = COLOR(x);
482 }
483
484 static void gradient_pyramid(RrSurface *sf, int inw, int inh)
485 {
486 int x, y, w = (inw >> 1) + 1, h = (inh >> 1) + 1;
487 RrPixel32 *data = sf->pixel_data;
488 RrPixel32 *end = data + inw*inh - 1;
489 RrPixel32 current;
490 RrColor left, right;
491 RrColor extracorner;
492
493 VARS(lefty);
494 VARS(righty);
495 VARS(x);
496
497 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
498 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
499 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
500
501 SETUP(lefty, (&extracorner), sf->secondary, h);
502 SETUP(righty, sf->primary, (&extracorner), h);
503
504 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
505 COLOR_RR(lefty, (&left));
506 COLOR_RR(righty, (&right));
507
508 SETUP(x, (&left), (&right), w);
509
510 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
511 current = COLOR(x);
512 *(data+x) = current;
513 *(data+inw-x) = current;
514 *(end-x) = current;
515 *(end-(inw-x)) = current;
516
517 NEXT(x);
518 }
519 current = COLOR(x);
520 *(data+x) = current;
521 *(data+inw-x) = current;
522 *(end-x) = current;
523 *(end-(inw-x)) = current;
524
525 data+=inw;
526 end-=inw;
527
528 NEXT(lefty);
529 NEXT(righty);
530 }
531 COLOR_RR(lefty, (&left));
532 COLOR_RR(righty, (&right));
533
534 SETUP(x, (&left), (&right), w);
535
536 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
537 current = COLOR(x);
538 *(data+x) = current;
539 *(data+inw-x) = current;
540 *(end-x) = current;
541 *(end-(inw-x)) = current;
542
543 NEXT(x);
544 }
545 current = COLOR(x);
546 *(data+x) = current;
547 *(data+inw-x) = current;
548 *(end-x) = current;
549 *(end-(inw-x)) = current;
550 }
551
my patches for the openbox window manager
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