1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
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
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.
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.
18 See the COPYING file for a copy of the GNU General Public License.
26 static void highlight(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);
37 void RrRender(RrAppearance *a, gint w, gint h)
39 RrPixel32 *data = a->surface.pixel_data;
44 switch (a->surface.grad) {
45 case RR_SURFACE_PARENTREL:
46 gradient_parentrelative(a, w, h);
48 case RR_SURFACE_SOLID:
49 gradient_solid(a, w, h);
51 case RR_SURFACE_SPLIT_VERTICAL:
52 gradient_splitvertical(a, w, h);
54 case RR_SURFACE_VERTICAL:
55 gradient_vertical(&a->surface, w, h);
57 case RR_SURFACE_HORIZONTAL:
58 gradient_horizontal(&a->surface, w, h);
60 case RR_SURFACE_MIRROR_HORIZONTAL:
61 gradient_mirrorhorizontal(&a->surface, w, h);
63 case RR_SURFACE_DIAGONAL:
64 gradient_diagonal(&a->surface, w, h);
66 case RR_SURFACE_CROSS_DIAGONAL:
67 gradient_crossdiagonal(&a->surface, w, h);
69 case RR_SURFACE_PYRAMID:
70 gradient_pyramid(&a->surface, w, h);
73 g_assert_not_reached(); /* unhandled gradient */
77 if (a->surface.interlaced) {
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);
88 for (i = 0; i < h; i += 2, p += w)
89 for (x = 0; x < w; ++x, ++p)
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;
104 for (off = 0, x = 0; x < h; ++x, off++) {
105 *(data + (off * w)) = current;
106 *(data + (off * w) + w - 1) = current;
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(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(data + off * w,
118 data + off * w + w - 1,
119 a->surface.relief==RR_RELIEF_RAISED);
122 if (a->surface.bevel == RR_BEVEL_2) {
123 for (off = 2, x = 2; x < w - 2; ++x, off++)
124 highlight(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(data + off * w + 1,
129 data + off * w + w - 2,
130 a->surface.relief==RR_RELIEF_RAISED);
135 static void highlight(RrPixel32 *x, RrPixel32 *y, gboolean raised)
139 RrPixel32 *up, *down;
147 r = (*up >> RrDefaultRedOffset) & 0xFF;
149 g = (*up >> RrDefaultGreenOffset) & 0xFF;
151 b = (*up >> RrDefaultBlueOffset) & 0xFF;
153 if (r > 0xFF) r = 0xFF;
154 if (g > 0xFF) g = 0xFF;
155 if (b > 0xFF) b = 0xFF;
156 *up = (r << RrDefaultRedOffset) + (g << RrDefaultGreenOffset)
157 + (b << RrDefaultBlueOffset);
159 r = (*down >> RrDefaultRedOffset) & 0xFF;
160 r = (r >> 1) + (r >> 2);
161 g = (*down >> RrDefaultGreenOffset) & 0xFF;
162 g = (g >> 1) + (g >> 2);
163 b = (*down >> RrDefaultBlueOffset) & 0xFF;
164 b = (b >> 1) + (b >> 2);
165 *down = (r << RrDefaultRedOffset) + (g << RrDefaultGreenOffset)
166 + (b << RrDefaultBlueOffset);
169 static void create_bevel_colors(RrAppearance *l)
174 r = l->surface.primary->r;
176 g = l->surface.primary->g;
178 b = l->surface.primary->b;
180 if (r > 0xFF) r = 0xFF;
181 if (g > 0xFF) g = 0xFF;
182 if (b > 0xFF) b = 0xFF;
183 g_assert(!l->surface.bevel_light);
184 l->surface.bevel_light = RrColorNew(l->inst, r, g, b);
187 r = l->surface.primary->r;
188 r = (r >> 1) + (r >> 2);
189 g = l->surface.primary->g;
190 g = (g >> 1) + (g >> 2);
191 b = l->surface.primary->b;
192 b = (b >> 1) + (b >> 2);
193 g_assert(!l->surface.bevel_dark);
194 l->surface.bevel_dark = RrColorNew(l->inst, r, g, b);
197 static void gradient_parentrelative(RrAppearance *a, gint w, gint h)
199 RrPixel32 *source, *dest;
200 gint sw, sh, partial_w, partial_h, i;
202 g_assert (a->surface.parent);
203 g_assert (a->surface.parent->w);
205 sw = a->surface.parent->w;
206 sh = a->surface.parent->h;
208 /* This is a little hack. When a texture is parentrelative, and the same
209 area as the parent, and has a bevel, it will draw its bevel on top
210 of the parent's, amplifying it. So instead, rerender the child with
211 the parent's settings, but the child's bevel and interlace */
212 if (a->surface.relief != RR_RELIEF_FLAT &&
213 (a->surface.parent->surface.relief != RR_RELIEF_FLAT ||
214 a->surface.parent->surface.border) &&
215 !a->surface.parentx && !a->surface.parenty &&
218 RrSurface old = a->surface;
219 a->surface = a->surface.parent->surface;
221 /* turn these off for the parent */
222 a->surface.relief = RR_RELIEF_FLAT;
223 a->surface.border = FALSE;
225 a->surface.pixel_data = old.pixel_data;
230 source = (a->surface.parent->surface.pixel_data +
231 a->surface.parentx + sw * a->surface.parenty);
232 dest = a->surface.pixel_data;
234 if (a->surface.parentx + w > sw) {
235 partial_w = sw - a->surface.parentx;
236 } else partial_w = w;
238 if (a->surface.parenty + h > sh) {
239 partial_h = sh - a->surface.parenty;
240 } else partial_h = h;
242 for (i = 0; i < partial_h; i++, source += sw, dest += w) {
243 memcpy(dest, source, partial_w * sizeof(RrPixel32));
248 static void gradient_solid(RrAppearance *l, gint w, gint h)
252 RrPixel32 *data = l->surface.pixel_data;
253 RrSurface *sp = &l->surface;
254 gint left = 0, top = 0, right = w - 1, bottom = h - 1;
256 pix = (sp->primary->r << RrDefaultRedOffset)
257 + (sp->primary->g << RrDefaultGreenOffset)
258 + (sp->primary->b << RrDefaultBlueOffset);
260 for (i = 0; i < w * h; i++)
266 XFillRectangle(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->primary),
269 switch (sp->relief) {
270 case RR_RELIEF_RAISED:
272 create_bevel_colors(l);
276 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
277 left, bottom, right, bottom);
278 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
279 right, bottom, right, top);
281 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
282 left, top, right, top);
283 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
284 left, bottom, left, top);
287 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
288 left + 2, bottom - 1, right - 2, bottom - 1);
289 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
290 right - 1, bottom - 1, right - 1, top + 1);
292 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
293 left + 2, top + 1, right - 2, top + 1);
294 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
295 left + 1, bottom - 1, left + 1, top + 1);
298 g_assert_not_reached(); /* unhandled BevelType */
301 case RR_RELIEF_SUNKEN:
303 create_bevel_colors(l);
307 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
308 left, bottom, right, bottom);
309 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
310 right, bottom, right, top);
312 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
313 left, top, right, top);
314 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
315 left, bottom, left, top);
318 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
319 left + 2, bottom - 1, right - 2, bottom - 1);
320 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
321 right - 1, bottom - 1, right - 1, top + 1);
323 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
324 left + 2, top + 1, right - 2, top + 1);
325 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
326 left + 1, bottom - 1, left + 1, top + 1);
329 g_assert_not_reached(); /* unhandled BevelType */
334 XDrawRectangle(RrDisplay(l->inst), l->pixmap,
335 RrColorGC(sp->border_color),
336 left, top, right, bottom);
340 g_assert_not_reached(); /* unhandled ReliefType */
344 /* * * * * * * * * * * * * * GRADIENT MAGIC WOOT * * * * * * * * * * * * * * */
348 gint len##x, cdelta##x[3], error##x[3] = { 0, 0, 0 }, inc##x[3]; \
349 gboolean bigslope##x[3] /* color slope > 1 */
351 #define SETUP(x, from, to, w) \
354 color##x[0] = from->r; \
355 color##x[1] = from->g; \
356 color##x[2] = from->b; \
358 cdelta##x[0] = to->r - from->r; \
359 cdelta##x[1] = to->g - from->g; \
360 cdelta##x[2] = to->b - from->b; \
362 if (cdelta##x[0] < 0) { \
363 cdelta##x[0] = -cdelta##x[0]; \
367 if (cdelta##x[1] < 0) { \
368 cdelta##x[1] = -cdelta##x[1]; \
372 if (cdelta##x[2] < 0) { \
373 cdelta##x[2] = -cdelta##x[2]; \
377 bigslope##x[0] = cdelta##x[0] > w;\
378 bigslope##x[1] = cdelta##x[1] > w;\
379 bigslope##x[2] = cdelta##x[2] > w
381 #define COLOR_RR(x, c) \
382 c->r = color##x[0]; \
383 c->g = color##x[1]; \
387 ((color##x[0] << RrDefaultRedOffset) + \
388 (color##x[1] << RrDefaultGreenOffset) + \
389 (color##x[2] << RrDefaultBlueOffset))
391 #define INCREMENT(x, i) \
397 for (i = 2; i >= 0; --i) { \
398 if (!cdelta##x[i]) continue; \
400 if (!bigslope##x[i]) { \
401 /* Y (color) is dependant on X */ \
402 error##x[i] += cdelta##x[i]; \
403 if ((error##x[i] << 1) >= len##x) { \
404 color##x[i] += INCREMENT(x, i); \
405 error##x[i] -= len##x; \
408 /* X is dependant on Y (color) */ \
410 color##x[i] += INCREMENT(x, i); \
411 error##x[i] += len##x; \
412 if ((error##x[i] << 1) >= cdelta##x[i]) { \
413 error##x[i] -= cdelta##x[i]; \
421 static void gradient_splitvertical(RrAppearance *a, gint w, gint h)
423 gint x, y1, y2, y3, r, g, b;
424 RrSurface *sf = &a->surface;
425 RrPixel32 *data = sf->pixel_data;
427 RrColor *primary_light, *secondary_light;
428 gint y1sz, y2sz, y3sz;
440 if (r > 0xFF) r = 0xFF;
441 if (g > 0xFF) g = 0xFF;
442 if (b > 0xFF) b = 0xFF;
443 primary_light = RrColorNew(a->inst, r, g, b);
445 r = sf->secondary->r;
447 g = sf->secondary->g;
449 b = sf->secondary->b;
451 if (r > 0xFF) r = 0xFF;
452 if (g > 0xFF) g = 0xFF;
453 if (b > 0xFF) b = 0xFF;
454 secondary_light = RrColorNew(a->inst, r, g, b);
456 y1sz = MAX(h/2 - 1, 1);
457 /* setup to get the colors _in between_ these other 2 */
458 y2sz = (h < 3 ? 0 : (h % 2 ? 3 : 2));
459 y3sz = MAX(h/2 - 1, 0);
461 SETUP(y1, primary_light, sf->primary, y1sz);
462 SETUP(y2, sf->primary, sf->secondary, y2sz);
463 SETUP(y3, sf->secondary, secondary_light, y3sz);
465 for (y1 = y1sz; y1 > 0; --y1) {
467 for (x = w - 1; x >= 0; --x)
473 NEXT(y2); /* skip the first one, its the same as the last of y1 */
474 for (y2 = y2sz; y2 > 0; --y2) {
476 for (x = w - 1; x >= 0; --x)
482 for (y3 = y3sz; y3 > 0; --y3) {
484 for (x = w - 1; x >= 0; --x)
490 RrColorFree(primary_light);
491 RrColorFree(secondary_light);
494 static void gradient_horizontal(RrSurface *sf, gint w, gint h)
497 RrPixel32 *data = sf->pixel_data, *datav;
501 SETUP(x, sf->primary, sf->secondary, w);
503 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
506 for (y = h - 1; y >= 0; --y) { /* 0 -> h */
515 for (y = h - 1; y >= 0; --y) /* 0 -> h */
516 *(data + y * w) = current;
519 static void gradient_mirrorhorizontal(RrSurface *sf, gint w, gint h)
522 RrPixel32 *data = sf->pixel_data, *datav;
526 SETUP(x, sf->primary, sf->secondary, w/2);
529 for (x = w - 1; x > w/2-1; --x) { /* 0 -> w-1 */
532 for (y = h - 1; y >= 0; --y) { /* 0 -> h */
540 SETUP(x, sf->secondary, sf->primary, w/2);
541 for (x = w/2 - 1; x > 0; --x) { /* 0 -> w-1 */
544 for (y = h - 1; y >= 0; --y) { /* 0 -> h */
554 for (y = h - 1; y >= 0; --y) /* 0 -> h */
555 *(data + y * w) = current;
558 static void gradient_vertical(RrSurface *sf, gint w, gint h)
561 RrPixel32 *data = sf->pixel_data;
565 SETUP(y, sf->primary, sf->secondary, h);
567 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
569 for (x = w - 1; x >= 0; --x) /* 0 -> w */
575 for (x = w - 1; x >= 0; --x) /* 0 -> w */
580 static void gradient_diagonal(RrSurface *sf, gint w, gint h)
583 RrPixel32 *data = sf->pixel_data;
591 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
592 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
593 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
595 SETUP(lefty, sf->primary, (&extracorner), h);
596 SETUP(righty, (&extracorner), sf->secondary, h);
598 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
599 COLOR_RR(lefty, (&left));
600 COLOR_RR(righty, (&right));
602 SETUP(x, (&left), (&right), w);
604 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
605 *(data++) = COLOR(x);
609 *(data++) = COLOR(x);
614 COLOR_RR(lefty, (&left));
615 COLOR_RR(righty, (&right));
617 SETUP(x, (&left), (&right), w);
619 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
620 *(data++) = COLOR(x);
627 static void gradient_crossdiagonal(RrSurface *sf, gint w, gint h)
630 RrPixel32 *data = sf->pixel_data;
638 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
639 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
640 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
642 SETUP(lefty, (&extracorner), sf->secondary, h);
643 SETUP(righty, sf->primary, (&extracorner), h);
645 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
646 COLOR_RR(lefty, (&left));
647 COLOR_RR(righty, (&right));
649 SETUP(x, (&left), (&right), w);
651 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
652 *(data++) = COLOR(x);
656 *(data++) = COLOR(x);
661 COLOR_RR(lefty, (&left));
662 COLOR_RR(righty, (&right));
664 SETUP(x, (&left), (&right), w);
666 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
667 *(data++) = COLOR(x);
674 static void gradient_pyramid(RrSurface *sf, gint inw, gint inh)
676 gint x, y, w = (inw >> 1) + 1, h = (inh >> 1) + 1;
677 RrPixel32 *data = sf->pixel_data;
678 RrPixel32 *end = data + inw*inh - 1;
687 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
688 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
689 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
691 SETUP(lefty, (&extracorner), sf->secondary, h);
692 SETUP(righty, sf->primary, (&extracorner), h);
694 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
695 COLOR_RR(lefty, (&left));
696 COLOR_RR(righty, (&right));
698 SETUP(x, (&left), (&right), w);
700 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
703 *(data+inw-x) = current;
705 *(end-(inw-x)) = current;
711 *(data+inw-x) = current;
713 *(end-(inw-x)) = current;
721 COLOR_RR(lefty, (&left));
722 COLOR_RR(righty, (&right));
724 SETUP(x, (&left), (&right), w);
726 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
729 *(data+inw-x) = current;
731 *(end-(inw-x)) = current;
737 *(data+inw-x) = current;
739 *(end-(inw-x)) = current;