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(RrSurface *s, 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(&a->surface, 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(&a->surface, 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(&a->surface, 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(&a->surface, data + off * w + 1,
129 data + off * w + w - 2,
130 a->surface.relief==RR_RELIEF_RAISED);
135 static void highlight(RrSurface *s, RrPixel32 *x, RrPixel32 *y, gboolean raised)
139 RrPixel32 *up, *down;
148 r = (*up >> RrDefaultRedOffset) & 0xFF;
149 r += (r * s->bevel_light_adjust) >> 8;
150 g = (*up >> RrDefaultGreenOffset) & 0xFF;
151 g += (g * s->bevel_light_adjust) >> 8;
152 b = (*up >> RrDefaultBlueOffset) & 0xFF;
153 b += (b * s->bevel_light_adjust) >> 8;
154 if (r > 0xFF) r = 0xFF;
155 if (g > 0xFF) g = 0xFF;
156 if (b > 0xFF) b = 0xFF;
157 *up = (r << RrDefaultRedOffset) + (g << RrDefaultGreenOffset)
158 + (b << RrDefaultBlueOffset);
160 r = (*down >> RrDefaultRedOffset) & 0xFF;
161 r -= (r * s->bevel_dark_adjust) >> 8;
162 g = (*down >> RrDefaultGreenOffset) & 0xFF;
163 g -= (g * s->bevel_dark_adjust) >> 8;
164 b = (*down >> RrDefaultBlueOffset) & 0xFF;
165 b -= (b * s->bevel_dark_adjust) >> 8;
166 *down = (r << RrDefaultRedOffset) + (g << RrDefaultGreenOffset)
167 + (b << RrDefaultBlueOffset);
170 static void create_bevel_colors(RrAppearance *l)
175 r = l->surface.primary->r;
176 r += (r * l->surface.bevel_light_adjust) >> 8;
177 g = l->surface.primary->g;
178 g += (g * l->surface.bevel_light_adjust) >> 8;
179 b = l->surface.primary->b;
180 b += (b * l->surface.bevel_light_adjust) >> 8;
181 if (r > 0xFF) r = 0xFF;
182 if (g > 0xFF) g = 0xFF;
183 if (b > 0xFF) b = 0xFF;
184 g_assert(!l->surface.bevel_light);
185 l->surface.bevel_light = RrColorNew(l->inst, r, g, b);
188 r = l->surface.primary->r;
189 r -= (r * l->surface.bevel_dark_adjust) >> 8;
190 g = l->surface.primary->g;
191 g -= (g * l->surface.bevel_dark_adjust) >> 8;
192 b = l->surface.primary->b;
193 b -= (b * l->surface.bevel_dark_adjust) >> 8;
194 g_assert(!l->surface.bevel_dark);
195 l->surface.bevel_dark = RrColorNew(l->inst, r, g, b);
198 static void gradient_parentrelative(RrAppearance *a, gint w, gint h)
200 RrPixel32 *source, *dest;
201 gint sw, sh, partial_w, partial_h, i;
203 g_assert (a->surface.parent);
204 g_assert (a->surface.parent->w);
206 sw = a->surface.parent->w;
207 sh = a->surface.parent->h;
209 /* This is a little hack. When a texture is parentrelative, and the same
210 area as the parent, and has a bevel, it will draw its bevel on top
211 of the parent's, amplifying it. So instead, rerender the child with
212 the parent's settings, but the child's bevel and interlace */
213 if (a->surface.relief != RR_RELIEF_FLAT &&
214 (a->surface.parent->surface.relief != RR_RELIEF_FLAT ||
215 a->surface.parent->surface.border) &&
216 !a->surface.parentx && !a->surface.parenty &&
219 RrSurface old = a->surface;
220 a->surface = a->surface.parent->surface;
222 /* turn these off for the parent */
223 a->surface.relief = RR_RELIEF_FLAT;
224 a->surface.border = FALSE;
226 a->surface.pixel_data = old.pixel_data;
231 source = (a->surface.parent->surface.pixel_data +
232 a->surface.parentx + sw * a->surface.parenty);
233 dest = a->surface.pixel_data;
235 if (a->surface.parentx + w > sw) {
236 partial_w = sw - a->surface.parentx;
237 } else partial_w = w;
239 if (a->surface.parenty + h > sh) {
240 partial_h = sh - a->surface.parenty;
241 } else partial_h = h;
243 for (i = 0; i < partial_h; i++, source += sw, dest += w) {
244 memcpy(dest, source, partial_w * sizeof(RrPixel32));
249 static void gradient_solid(RrAppearance *l, gint w, gint h)
253 RrPixel32 *data = l->surface.pixel_data;
254 RrSurface *sp = &l->surface;
255 gint left = 0, top = 0, right = w - 1, bottom = h - 1;
257 pix = (sp->primary->r << RrDefaultRedOffset)
258 + (sp->primary->g << RrDefaultGreenOffset)
259 + (sp->primary->b << RrDefaultBlueOffset);
261 for (i = 0; i < w * h; i++)
267 XFillRectangle(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->primary),
270 switch (sp->relief) {
271 case RR_RELIEF_RAISED:
273 create_bevel_colors(l);
277 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
278 left, bottom, right, bottom);
279 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
280 right, bottom, right, top);
282 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
283 left, top, right, top);
284 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
285 left, bottom, left, top);
288 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
289 left + 2, bottom - 1, right - 2, bottom - 1);
290 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
291 right - 1, bottom - 1, right - 1, top + 1);
293 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
294 left + 2, top + 1, right - 2, top + 1);
295 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
296 left + 1, bottom - 1, left + 1, top + 1);
299 g_assert_not_reached(); /* unhandled BevelType */
302 case RR_RELIEF_SUNKEN:
304 create_bevel_colors(l);
308 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
309 left, bottom, right, bottom);
310 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
311 right, bottom, right, top);
313 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
314 left, top, right, top);
315 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
316 left, bottom, left, top);
319 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
320 left + 2, bottom - 1, right - 2, bottom - 1);
321 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
322 right - 1, bottom - 1, right - 1, top + 1);
324 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
325 left + 2, top + 1, right - 2, top + 1);
326 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
327 left + 1, bottom - 1, left + 1, top + 1);
330 g_assert_not_reached(); /* unhandled BevelType */
335 XDrawRectangle(RrDisplay(l->inst), l->pixmap,
336 RrColorGC(sp->border_color),
337 left, top, right, bottom);
341 g_assert_not_reached(); /* unhandled ReliefType */
345 /* * * * * * * * * * * * * * GRADIENT MAGIC WOOT * * * * * * * * * * * * * * */
349 gint len##x, cdelta##x[3], error##x[3] = { 0, 0, 0 }, inc##x[3]; \
350 gboolean bigslope##x[3] /* color slope > 1 */
352 #define SETUP(x, from, to, w) \
355 color##x[0] = from->r; \
356 color##x[1] = from->g; \
357 color##x[2] = from->b; \
359 cdelta##x[0] = to->r - from->r; \
360 cdelta##x[1] = to->g - from->g; \
361 cdelta##x[2] = to->b - from->b; \
363 if (cdelta##x[0] < 0) { \
364 cdelta##x[0] = -cdelta##x[0]; \
368 if (cdelta##x[1] < 0) { \
369 cdelta##x[1] = -cdelta##x[1]; \
373 if (cdelta##x[2] < 0) { \
374 cdelta##x[2] = -cdelta##x[2]; \
378 bigslope##x[0] = cdelta##x[0] > w;\
379 bigslope##x[1] = cdelta##x[1] > w;\
380 bigslope##x[2] = cdelta##x[2] > w
382 #define COLOR_RR(x, c) \
383 c->r = color##x[0]; \
384 c->g = color##x[1]; \
388 ((color##x[0] << RrDefaultRedOffset) + \
389 (color##x[1] << RrDefaultGreenOffset) + \
390 (color##x[2] << RrDefaultBlueOffset))
392 #define INCREMENT(x, i) \
398 for (i = 2; i >= 0; --i) { \
399 if (!cdelta##x[i]) continue; \
401 if (!bigslope##x[i]) { \
402 /* Y (color) is dependant on X */ \
403 error##x[i] += cdelta##x[i]; \
404 if ((error##x[i] << 1) >= len##x) { \
405 color##x[i] += INCREMENT(x, i); \
406 error##x[i] -= len##x; \
409 /* X is dependant on Y (color) */ \
411 color##x[i] += INCREMENT(x, i); \
412 error##x[i] += len##x; \
413 if ((error##x[i] << 1) >= cdelta##x[i]) { \
414 error##x[i] -= cdelta##x[i]; \
422 static void gradient_splitvertical(RrAppearance *a, gint w, gint h)
424 gint x, y1, y2, y3, r, g, b;
425 RrSurface *sf = &a->surface;
426 RrPixel32 *data = sf->pixel_data;
428 RrColor *primary_light, *secondary_light;
429 gint y1sz, y2sz, y3sz;
441 if (r > 0xFF) r = 0xFF;
442 if (g > 0xFF) g = 0xFF;
443 if (b > 0xFF) b = 0xFF;
444 primary_light = RrColorNew(a->inst, r, g, b);
446 r = sf->secondary->r;
448 g = sf->secondary->g;
450 b = sf->secondary->b;
452 if (r > 0xFF) r = 0xFF;
453 if (g > 0xFF) g = 0xFF;
454 if (b > 0xFF) b = 0xFF;
455 secondary_light = RrColorNew(a->inst, r, g, b);
457 y1sz = MAX(h/2 - 1, 1);
458 /* setup to get the colors _in between_ these other 2 */
459 y2sz = (h < 3 ? 0 : (h % 2 ? 3 : 2));
460 y3sz = MAX(h/2 - 1, 0);
462 SETUP(y1, primary_light, sf->primary, y1sz);
464 SETUP(y2, sf->primary, sf->secondary, y2sz);
465 NEXT(y2); /* skip the first one, its the same as the last of y1 */
467 SETUP(y3, sf->secondary, secondary_light, y3sz);
469 for (y1 = y1sz; y1 > 0; --y1) {
471 for (x = w - 1; x >= 0; --x)
477 for (y2 = y2sz; y2 > 0; --y2) {
479 for (x = w - 1; x >= 0; --x)
485 for (y3 = y3sz; y3 > 0; --y3) {
487 for (x = w - 1; x >= 0; --x)
493 RrColorFree(primary_light);
494 RrColorFree(secondary_light);
497 static void gradient_horizontal(RrSurface *sf, gint w, gint h)
500 RrPixel32 *data = sf->pixel_data, *datav;
504 SETUP(x, sf->primary, sf->secondary, w);
506 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
509 for (y = h - 1; y >= 0; --y) { /* 0 -> h */
518 for (y = h - 1; y >= 0; --y) /* 0 -> h */
519 *(data + y * w) = current;
522 static void gradient_mirrorhorizontal(RrSurface *sf, gint w, gint h)
525 RrPixel32 *data = sf->pixel_data, *datav;
529 SETUP(x, sf->primary, sf->secondary, w/2);
532 for (x = w - 1; x > w/2-1; --x) { /* 0 -> w-1 */
535 for (y = h - 1; y >= 0; --y) { /* 0 -> h */
543 SETUP(x, sf->secondary, sf->primary, w/2);
544 for (x = w/2 - 1; x > 0; --x) { /* 0 -> w-1 */
547 for (y = h - 1; y >= 0; --y) { /* 0 -> h */
557 for (y = h - 1; y >= 0; --y) /* 0 -> h */
558 *(data + y * w) = current;
561 static void gradient_vertical(RrSurface *sf, gint w, gint h)
564 RrPixel32 *data = sf->pixel_data;
568 SETUP(y, sf->primary, sf->secondary, h);
570 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
572 for (x = w - 1; x >= 0; --x) /* 0 -> w */
578 for (x = w - 1; x >= 0; --x) /* 0 -> w */
583 static void gradient_diagonal(RrSurface *sf, gint w, gint h)
586 RrPixel32 *data = sf->pixel_data;
594 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
595 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
596 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
598 SETUP(lefty, sf->primary, (&extracorner), h);
599 SETUP(righty, (&extracorner), sf->secondary, h);
601 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
602 COLOR_RR(lefty, (&left));
603 COLOR_RR(righty, (&right));
605 SETUP(x, (&left), (&right), w);
607 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
608 *(data++) = COLOR(x);
612 *(data++) = COLOR(x);
617 COLOR_RR(lefty, (&left));
618 COLOR_RR(righty, (&right));
620 SETUP(x, (&left), (&right), w);
622 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
623 *(data++) = COLOR(x);
630 static void gradient_crossdiagonal(RrSurface *sf, gint w, gint h)
633 RrPixel32 *data = sf->pixel_data;
641 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
642 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
643 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
645 SETUP(lefty, (&extracorner), sf->secondary, h);
646 SETUP(righty, sf->primary, (&extracorner), h);
648 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
649 COLOR_RR(lefty, (&left));
650 COLOR_RR(righty, (&right));
652 SETUP(x, (&left), (&right), w);
654 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
655 *(data++) = COLOR(x);
659 *(data++) = COLOR(x);
664 COLOR_RR(lefty, (&left));
665 COLOR_RR(righty, (&right));
667 SETUP(x, (&left), (&right), w);
669 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
670 *(data++) = COLOR(x);
677 static void gradient_pyramid(RrSurface *sf, gint inw, gint inh)
679 gint x, y, w = (inw >> 1) + 1, h = (inh >> 1) + 1;
680 RrPixel32 *data = sf->pixel_data;
681 RrPixel32 *end = data + inw*inh - 1;
690 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
691 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
692 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
694 SETUP(lefty, (&extracorner), sf->secondary, h);
695 SETUP(righty, sf->primary, (&extracorner), h);
697 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
698 COLOR_RR(lefty, (&left));
699 COLOR_RR(righty, (&right));
701 SETUP(x, (&left), (&right), w);
703 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
706 *(data+inw-x) = current;
708 *(end-(inw-x)) = current;
714 *(data+inw-x) = current;
716 *(end-(inw-x)) = current;
724 COLOR_RR(lefty, (&left));
725 COLOR_RR(righty, (&right));
727 SETUP(x, (&left), (&right), w);
729 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
732 *(data+inw-x) = current;
734 *(end-(inw-x)) = current;
740 *(data+inw-x) = current;
742 *(end-(inw-x)) = current;