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