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 Ben 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_solid(RrAppearance *l, gint w, gint h);
28 static void gradient_splitvertical(RrAppearance *a, gint w, gint h);
29 static void gradient_vertical(RrSurface *sf, gint w, gint h);
30 static void gradient_horizontal(RrSurface *sf, gint w, gint h);
31 static void gradient_mirrorhorizontal(RrSurface *sf, gint w, gint h);
32 static void gradient_diagonal(RrSurface *sf, gint w, gint h);
33 static void gradient_crossdiagonal(RrSurface *sf, gint w, gint h);
34 static void gradient_pyramid(RrSurface *sf, gint inw, gint inh);
36 void RrRender(RrAppearance *a, gint w, gint h)
38 RrPixel32 *data = a->surface.pixel_data;
43 switch (a->surface.grad) {
44 case RR_SURFACE_SOLID:
45 gradient_solid(a, w, h);
47 case RR_SURFACE_SPLIT_VERTICAL:
48 gradient_splitvertical(a, w, h);
50 case RR_SURFACE_VERTICAL:
51 gradient_vertical(&a->surface, w, h);
53 case RR_SURFACE_HORIZONTAL:
54 gradient_horizontal(&a->surface, w, h);
56 case RR_SURFACE_MIRROR_HORIZONTAL:
57 gradient_mirrorhorizontal(&a->surface, w, h);
59 case RR_SURFACE_DIAGONAL:
60 gradient_diagonal(&a->surface, w, h);
62 case RR_SURFACE_CROSS_DIAGONAL:
63 gradient_crossdiagonal(&a->surface, w, h);
65 case RR_SURFACE_PYRAMID:
66 gradient_pyramid(&a->surface, w, h);
69 g_assert_not_reached(); /* unhandled gradient */
73 if (a->surface.interlaced) {
77 r = a->surface.interlace_color->r;
78 g = a->surface.interlace_color->g;
79 b = a->surface.interlace_color->b;
80 current = (r << RrDefaultRedOffset)
81 + (g << RrDefaultGreenOffset)
82 + (b << RrDefaultBlueOffset);
84 for (i = 0; i < h; i += 2, p += w)
85 for (x = 0; x < w; ++x, ++p)
89 if (a->surface.relief == RR_RELIEF_FLAT && a->surface.border) {
90 r = a->surface.border_color->r;
91 g = a->surface.border_color->g;
92 b = a->surface.border_color->b;
93 current = (r << RrDefaultRedOffset)
94 + (g << RrDefaultGreenOffset)
95 + (b << RrDefaultBlueOffset);
96 for (off = 0, x = 0; x < w; ++x, off++) {
97 *(data + off) = current;
98 *(data + off + ((h-1) * w)) = current;
100 for (off = 0, x = 0; x < h; ++x, off++) {
101 *(data + (off * w)) = current;
102 *(data + (off * w) + w - 1) = current;
106 if (a->surface.relief != RR_RELIEF_FLAT) {
107 if (a->surface.bevel == RR_BEVEL_1) {
108 for (off = 1, x = 1; x < w - 1; ++x, off++)
109 highlight(data + off,
110 data + off + (h-1) * w,
111 a->surface.relief==RR_RELIEF_RAISED);
112 for (off = 0, x = 0; x < h; ++x, off++)
113 highlight(data + off * w,
114 data + off * w + w - 1,
115 a->surface.relief==RR_RELIEF_RAISED);
118 if (a->surface.bevel == RR_BEVEL_2) {
119 for (off = 2, x = 2; x < w - 2; ++x, off++)
120 highlight(data + off + w,
121 data + off + (h-2) * w,
122 a->surface.relief==RR_RELIEF_RAISED);
123 for (off = 1, x = 1; x < h-1; ++x, off++)
124 highlight(data + off * w + 1,
125 data + off * w + w - 2,
126 a->surface.relief==RR_RELIEF_RAISED);
131 static void highlight(RrPixel32 *x, RrPixel32 *y, gboolean raised)
135 RrPixel32 *up, *down;
143 r = (*up >> RrDefaultRedOffset) & 0xFF;
145 g = (*up >> RrDefaultGreenOffset) & 0xFF;
147 b = (*up >> RrDefaultBlueOffset) & 0xFF;
149 if (r > 0xFF) r = 0xFF;
150 if (g > 0xFF) g = 0xFF;
151 if (b > 0xFF) b = 0xFF;
152 *up = (r << RrDefaultRedOffset) + (g << RrDefaultGreenOffset)
153 + (b << RrDefaultBlueOffset);
155 r = (*down >> RrDefaultRedOffset) & 0xFF;
156 r = (r >> 1) + (r >> 2);
157 g = (*down >> RrDefaultGreenOffset) & 0xFF;
158 g = (g >> 1) + (g >> 2);
159 b = (*down >> RrDefaultBlueOffset) & 0xFF;
160 b = (b >> 1) + (b >> 2);
161 *down = (r << RrDefaultRedOffset) + (g << RrDefaultGreenOffset)
162 + (b << RrDefaultBlueOffset);
165 static void create_bevel_colors(RrAppearance *l)
170 r = l->surface.primary->r;
172 g = l->surface.primary->g;
174 b = l->surface.primary->b;
176 if (r > 0xFF) r = 0xFF;
177 if (g > 0xFF) g = 0xFF;
178 if (b > 0xFF) b = 0xFF;
179 g_assert(!l->surface.bevel_light);
180 l->surface.bevel_light = RrColorNew(l->inst, r, g, b);
183 r = l->surface.primary->r;
184 r = (r >> 1) + (r >> 2);
185 g = l->surface.primary->g;
186 g = (g >> 1) + (g >> 2);
187 b = l->surface.primary->b;
188 b = (b >> 1) + (b >> 2);
189 g_assert(!l->surface.bevel_dark);
190 l->surface.bevel_dark = RrColorNew(l->inst, r, g, b);
193 static void gradient_solid(RrAppearance *l, gint w, gint h)
197 RrPixel32 *data = l->surface.pixel_data;
198 RrSurface *sp = &l->surface;
199 gint left = 0, top = 0, right = w - 1, bottom = h - 1;
201 pix = (sp->primary->r << RrDefaultRedOffset)
202 + (sp->primary->g << RrDefaultGreenOffset)
203 + (sp->primary->b << RrDefaultBlueOffset);
205 for (i = 0; i < w * h; i++)
211 XFillRectangle(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->primary),
214 switch (sp->relief) {
215 case RR_RELIEF_RAISED:
217 create_bevel_colors(l);
221 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
222 left, bottom, right, bottom);
223 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
224 right, bottom, right, top);
226 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
227 left, top, right, top);
228 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
229 left, bottom, left, top);
232 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
233 left + 2, bottom - 1, right - 2, bottom - 1);
234 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
235 right - 1, bottom - 1, right - 1, top + 1);
237 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
238 left + 2, top + 1, right - 2, top + 1);
239 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
240 left + 1, bottom - 1, left + 1, top + 1);
243 g_assert_not_reached(); /* unhandled BevelType */
246 case RR_RELIEF_SUNKEN:
248 create_bevel_colors(l);
252 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
253 left, bottom, right, bottom);
254 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
255 right, bottom, right, top);
257 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
258 left, top, right, top);
259 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
260 left, bottom, left, top);
263 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
264 left + 2, bottom - 1, right - 2, bottom - 1);
265 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
266 right - 1, bottom - 1, right - 1, top + 1);
268 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
269 left + 2, top + 1, right - 2, top + 1);
270 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
271 left + 1, bottom - 1, left + 1, top + 1);
274 g_assert_not_reached(); /* unhandled BevelType */
279 XDrawRectangle(RrDisplay(l->inst), l->pixmap,
280 RrColorGC(sp->border_color),
281 left, top, right, bottom);
285 g_assert_not_reached(); /* unhandled ReliefType */
289 /* * * * * * * * * * * * * * GRADIENT MAGIC WOOT * * * * * * * * * * * * * * */
293 gint len##x, cdelta##x[3], error##x[3] = { 0, 0, 0 }, inc##x[3]; \
294 gboolean bigslope##x[3] /* color slope > 1 */
296 #define SETUP(x, from, to, w) \
299 color##x[0] = from->r; \
300 color##x[1] = from->g; \
301 color##x[2] = from->b; \
303 cdelta##x[0] = to->r - from->r; \
304 cdelta##x[1] = to->g - from->g; \
305 cdelta##x[2] = to->b - from->b; \
307 if (cdelta##x[0] < 0) { \
308 cdelta##x[0] = -cdelta##x[0]; \
312 if (cdelta##x[1] < 0) { \
313 cdelta##x[1] = -cdelta##x[1]; \
317 if (cdelta##x[2] < 0) { \
318 cdelta##x[2] = -cdelta##x[2]; \
322 bigslope##x[0] = cdelta##x[0] > w;\
323 bigslope##x[1] = cdelta##x[1] > w;\
324 bigslope##x[2] = cdelta##x[2] > w
326 #define COLOR_RR(x, c) \
327 c->r = color##x[0]; \
328 c->g = color##x[1]; \
332 ((color##x[0] << RrDefaultRedOffset) + \
333 (color##x[1] << RrDefaultGreenOffset) + \
334 (color##x[2] << RrDefaultBlueOffset))
336 #define INCREMENT(x, i) \
342 for (i = 2; i >= 0; --i) { \
343 if (!cdelta##x[i]) continue; \
345 if (!bigslope##x[i]) { \
346 /* Y (color) is dependant on X */ \
347 error##x[i] += cdelta##x[i]; \
348 if ((error##x[i] << 1) >= len##x) { \
349 color##x[i] += INCREMENT(x, i); \
350 error##x[i] -= len##x; \
353 /* X is dependant on Y (color) */ \
355 color##x[i] += INCREMENT(x, i); \
356 error##x[i] += len##x; \
357 if ((error##x[i] << 1) >= cdelta##x[i]) { \
358 error##x[i] -= cdelta##x[i]; \
366 static void gradient_splitvertical(RrAppearance *a, gint w, gint h)
368 gint x, y1, y3, r, g, b;
369 RrSurface *sf = &a->surface;
370 RrPixel32 *data = sf->pixel_data;
372 RrColor *primary_light, *secondary_light;
383 if (r > 0xFF) r = 0xFF;
384 if (g > 0xFF) g = 0xFF;
385 if (b > 0xFF) b = 0xFF;
386 primary_light = RrColorNew(a->inst, r, g, b);
388 r = sf->secondary->r;
390 g = sf->secondary->g;
392 b = sf->secondary->b;
394 if (r > 0xFF) r = 0xFF;
395 if (g > 0xFF) g = 0xFF;
396 if (b > 0xFF) b = 0xFF;
397 secondary_light = RrColorNew(a->inst, r, g, b);
399 SETUP(y1, primary_light, sf->primary, (h / 2) -1);
400 SETUP(y3, sf->secondary, secondary_light, (h / 2) -1);
402 for (y1 = h - 1; y1 > (h / 2) -1; --y1) { /* 0 -> h-1 */
404 for (x = w - 1; x >= 0; --x) /* 0 -> w */
411 for (y3 = (h / 2) - 1; y3 > 0; --y3) {
413 for (x = w - 1; x >= 0; --x)
420 for (x = w - 1; x >= 0; --x) /* 0 -> w */
423 RrColorFree(primary_light);
424 RrColorFree(secondary_light);
427 static void gradient_horizontal(RrSurface *sf, gint w, gint h)
430 RrPixel32 *data = sf->pixel_data, *datav;
434 SETUP(x, sf->primary, sf->secondary, w);
436 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
439 for (y = h - 1; y >= 0; --y) { /* 0 -> h */
448 for (y = h - 1; y >= 0; --y) /* 0 -> h */
449 *(data + y * w) = current;
452 static void gradient_mirrorhorizontal(RrSurface *sf, gint w, gint h)
455 RrPixel32 *data = sf->pixel_data, *datav;
459 SETUP(x, sf->primary, sf->secondary, w/2);
462 for (x = w - 1; x > w/2-1; --x) { /* 0 -> w-1 */
465 for (y = h - 1; y >= 0; --y) { /* 0 -> h */
473 SETUP(x, sf->secondary, sf->primary, w/2);
474 for (x = w/2 - 1; x > 0; --x) { /* 0 -> w-1 */
477 for (y = h - 1; y >= 0; --y) { /* 0 -> h */
487 for (y = h - 1; y >= 0; --y) /* 0 -> h */
488 *(data + y * w) = current;
491 static void gradient_vertical(RrSurface *sf, gint w, gint h)
494 RrPixel32 *data = sf->pixel_data;
498 SETUP(y, sf->primary, sf->secondary, h);
500 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
502 for (x = w - 1; x >= 0; --x) /* 0 -> w */
508 for (x = w - 1; x >= 0; --x) /* 0 -> w */
513 static void gradient_diagonal(RrSurface *sf, gint w, gint h)
516 RrPixel32 *data = sf->pixel_data;
524 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
525 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
526 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
528 SETUP(lefty, sf->primary, (&extracorner), h);
529 SETUP(righty, (&extracorner), sf->secondary, h);
531 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
532 COLOR_RR(lefty, (&left));
533 COLOR_RR(righty, (&right));
535 SETUP(x, (&left), (&right), w);
537 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
538 *(data++) = COLOR(x);
542 *(data++) = COLOR(x);
547 COLOR_RR(lefty, (&left));
548 COLOR_RR(righty, (&right));
550 SETUP(x, (&left), (&right), w);
552 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
553 *(data++) = COLOR(x);
560 static void gradient_crossdiagonal(RrSurface *sf, gint w, gint h)
563 RrPixel32 *data = sf->pixel_data;
571 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
572 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
573 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
575 SETUP(lefty, (&extracorner), sf->secondary, h);
576 SETUP(righty, sf->primary, (&extracorner), h);
578 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
579 COLOR_RR(lefty, (&left));
580 COLOR_RR(righty, (&right));
582 SETUP(x, (&left), (&right), w);
584 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
585 *(data++) = COLOR(x);
589 *(data++) = COLOR(x);
594 COLOR_RR(lefty, (&left));
595 COLOR_RR(righty, (&right));
597 SETUP(x, (&left), (&right), w);
599 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
600 *(data++) = COLOR(x);
607 static void gradient_pyramid(RrSurface *sf, gint inw, gint inh)
609 gint x, y, w = (inw >> 1) + 1, h = (inh >> 1) + 1;
610 RrPixel32 *data = sf->pixel_data;
611 RrPixel32 *end = data + inw*inh - 1;
620 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
621 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
622 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
624 SETUP(lefty, (&extracorner), sf->secondary, h);
625 SETUP(righty, sf->primary, (&extracorner), h);
627 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
628 COLOR_RR(lefty, (&left));
629 COLOR_RR(righty, (&right));
631 SETUP(x, (&left), (&right), w);
633 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
636 *(data+inw-x) = current;
638 *(end-(inw-x)) = current;
644 *(data+inw-x) = current;
646 *(end-(inw-x)) = current;
654 COLOR_RR(lefty, (&left));
655 COLOR_RR(righty, (&right));
657 SETUP(x, (&left), (&right), w);
659 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
662 *(data+inw-x) = current;
664 *(end-(inw-x)) = current;
670 *(data+inw-x) = current;
672 *(end-(inw-x)) = current;