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lwindow needs a type
[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.RrPixel_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->RrPixel_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 NEXT(x) \
308 { \
309 int i; \
310 for (i = 2; i >= 0; --i) { \
311 if (!cdelta##x[i]) continue; \
312 \
313 if (!bigslope##x[i]) { \
314 /* Y (color) is dependant on X */ \
315 error##x[i] += cdelta##x[i]; \
316 if ((error##x[i] << 1) >= len##x) { \
317 color##x[i] += inc##x[i]; \
318 error##x[i] -= len##x; \
319 } \
320 } else { \
321 /* X is dependant on Y (color) */ \
322 while (1) { \
323 color##x[i] += inc##x[i]; \
324 error##x[i] += len##x; \
325 if ((error##x[i] << 1) >= cdelta##x[i]) { \
326 error##x[i] -= cdelta##x[i]; \
327 break; \
328 } \
329 } \
330 } \
331 } \
332 }
333
334 static void gradient_horizontal(RrSurface *sf, int w, int h)
335 {
336 int x, y;
337 RrPixel32 *data = sf->RrPixel_data, *datav;
338 RrPixel32 current;
339
340 VARS(x);
341 SETUP(x, sf->primary, sf->secondary, w);
342
343 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
344 current = COLOR(x);
345 datav = data;
346 for (y = h - 1; y >= 0; --y) { /* 0 -> h */
347 *datav = current;
348 datav += w;
349 }
350 ++data;
351
352 NEXT(x);
353 }
354 current = COLOR(x);
355 for (y = h - 1; y >= 0; --y) /* 0 -> h */
356 *(data + y * w) = current;
357 }
358
359 static void gradient_vertical(RrSurface *sf, int w, int h)
360 {
361 int x, y;
362 RrPixel32 *data = sf->RrPixel_data;
363 RrPixel32 current;
364
365 VARS(y);
366 SETUP(y, sf->primary, sf->secondary, h);
367
368 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
369 current = COLOR(y);
370 for (x = w - 1; x >= 0; --x) /* 0 -> w */
371 *(data++) = current;
372
373 NEXT(y);
374 }
375 current = COLOR(y);
376 for (x = w - 1; x >= 0; --x) /* 0 -> w */
377 *(data++) = current;
378 }
379
380
381 static void gradient_diagonal(RrSurface *sf, int w, int h)
382 {
383 int x, y;
384 RrPixel32 *data = sf->RrPixel_data;
385 RrColor left, right;
386 RrColor extracorner;
387
388 VARS(lefty);
389 VARS(righty);
390 VARS(x);
391
392 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
393 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
394 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
395
396 SETUP(lefty, sf->primary, (&extracorner), h);
397 SETUP(righty, (&extracorner), sf->secondary, h);
398
399 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
400 COLOR_RR(lefty, (&left));
401 COLOR_RR(righty, (&right));
402
403 SETUP(x, (&left), (&right), w);
404
405 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
406 *(data++) = COLOR(x);
407
408 NEXT(x);
409 }
410 *(data++) = COLOR(x);
411
412 NEXT(lefty);
413 NEXT(righty);
414 }
415 COLOR_RR(lefty, (&left));
416 COLOR_RR(righty, (&right));
417
418 SETUP(x, (&left), (&right), w);
419
420 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
421 *(data++) = COLOR(x);
422
423 NEXT(x);
424 }
425 *data = COLOR(x);
426 }
427
428 static void gradient_crossdiagonal(RrSurface *sf, int w, int h)
429 {
430 int x, y;
431 RrPixel32 *data = sf->RrPixel_data;
432 RrColor left, right;
433 RrColor extracorner;
434
435 VARS(lefty);
436 VARS(righty);
437 VARS(x);
438
439 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
440 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
441 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
442
443 SETUP(lefty, (&extracorner), sf->secondary, h);
444 SETUP(righty, sf->primary, (&extracorner), h);
445
446 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
447 COLOR_RR(lefty, (&left));
448 COLOR_RR(righty, (&right));
449
450 SETUP(x, (&left), (&right), w);
451
452 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
453 *(data++) = COLOR(x);
454
455 NEXT(x);
456 }
457 *(data++) = COLOR(x);
458
459 NEXT(lefty);
460 NEXT(righty);
461 }
462 COLOR_RR(lefty, (&left));
463 COLOR_RR(righty, (&right));
464
465 SETUP(x, (&left), (&right), w);
466
467 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
468 *(data++) = COLOR(x);
469
470 NEXT(x);
471 }
472 *data = COLOR(x);
473 }
474
475 static void gradient_pyramid(RrSurface *sf, int inw, int inh)
476 {
477 int x, y, w = (inw >> 1) + 1, h = (inh >> 1) + 1;
478 RrPixel32 *data = sf->RrPixel_data;
479 RrPixel32 *end = data + inw*inh - 1;
480 RrPixel32 current;
481 RrColor left, right;
482 RrColor extracorner;
483
484 VARS(lefty);
485 VARS(righty);
486 VARS(x);
487
488 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
489 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
490 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
491
492 SETUP(lefty, (&extracorner), sf->secondary, h);
493 SETUP(righty, sf->primary, (&extracorner), h);
494
495 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
496 COLOR_RR(lefty, (&left));
497 COLOR_RR(righty, (&right));
498
499 SETUP(x, (&left), (&right), w);
500
501 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
502 current = COLOR(x);
503 *(data+x) = current;
504 *(data+inw-x) = current;
505 *(end-x) = current;
506 *(end-(inw-x)) = current;
507
508 NEXT(x);
509 }
510 current = COLOR(x);
511 *(data+x) = current;
512 *(data+inw-x) = current;
513 *(end-x) = current;
514 *(end-(inw-x)) = current;
515
516 data+=inw;
517 end-=inw;
518
519 NEXT(lefty);
520 NEXT(righty);
521 }
522 COLOR_RR(lefty, (&left));
523 COLOR_RR(righty, (&right));
524
525 SETUP(x, (&left), (&right), w);
526
527 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
528 current = COLOR(x);
529 *(data+x) = current;
530 *(data+inw-x) = current;
531 *(end-x) = current;
532 *(end-(inw-x)) = current;
533
534 NEXT(x);
535 }
536 current = COLOR(x);
537 *(data+x) = current;
538 *(data+inw-x) = current;
539 *(end-x) = current;
540 *(end-(inw-x)) = current;
541 }
542
my patches for the openbox window manager
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