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) 2003-2008 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.
27 static void highlight(RrSurface *s, RrPixel32 *x, RrPixel32 *y,
29 static void gradient_parentrelative(RrAppearance *a, gint w, gint h);
30 static void gradient_solid(RrAppearance *l, gint w, gint h);
31 static void gradient_splitvertical(RrAppearance *a, gint w, gint h);
32 static void gradient_vertical(RrSurface *sf, gint w, gint h);
33 static void gradient_horizontal(RrSurface *sf, gint w, gint h);
34 static void gradient_mirrorhorizontal(RrSurface *sf, gint w, gint h);
35 static void gradient_diagonal(RrSurface *sf, gint w, gint h);
36 static void gradient_crossdiagonal(RrSurface *sf, gint w, gint h);
37 static void gradient_pyramid(RrSurface *sf, gint inw, gint inh);
39 void RrRender(RrAppearance *a, gint w, gint h)
41 RrPixel32 *data = a->surface.pixel_data;
46 switch (a->surface.grad) {
47 case RR_SURFACE_PARENTREL:
48 gradient_parentrelative(a, w, h);
50 case RR_SURFACE_SOLID:
51 gradient_solid(a, w, h);
53 case RR_SURFACE_SPLIT_VERTICAL:
54 gradient_splitvertical(a, w, h);
56 case RR_SURFACE_VERTICAL:
57 gradient_vertical(&a->surface, w, h);
59 case RR_SURFACE_HORIZONTAL:
60 gradient_horizontal(&a->surface, w, h);
62 case RR_SURFACE_MIRROR_HORIZONTAL:
63 gradient_mirrorhorizontal(&a->surface, w, h);
65 case RR_SURFACE_DIAGONAL:
66 gradient_diagonal(&a->surface, w, h);
68 case RR_SURFACE_CROSS_DIAGONAL:
69 gradient_crossdiagonal(&a->surface, w, h);
71 case RR_SURFACE_PYRAMID:
72 gradient_pyramid(&a->surface, w, h);
75 g_assert_not_reached(); /* unhandled gradient */
79 if (a->surface.interlaced) {
83 r = a->surface.interlace_color->r;
84 g = a->surface.interlace_color->g;
85 b = a->surface.interlace_color->b;
86 current = (r << RrDefaultRedOffset)
87 + (g << RrDefaultGreenOffset)
88 + (b << RrDefaultBlueOffset);
90 for (i = 0; i < h; i += 2, p += w)
91 for (x = 0; x < w; ++x, ++p)
95 if (a->surface.relief == RR_RELIEF_FLAT && a->surface.border) {
96 r = a->surface.border_color->r;
97 g = a->surface.border_color->g;
98 b = a->surface.border_color->b;
99 current = (r << RrDefaultRedOffset)
100 + (g << RrDefaultGreenOffset)
101 + (b << RrDefaultBlueOffset);
102 for (off = 0, x = 0; x < w; ++x, off++) {
103 *(data + off) = current;
104 *(data + off + ((h-1) * w)) = current;
106 for (off = 0, x = 0; x < h; ++x, off++) {
107 *(data + (off * w)) = current;
108 *(data + (off * w) + w - 1) = current;
112 if (a->surface.relief != RR_RELIEF_FLAT) {
113 if (a->surface.bevel == RR_BEVEL_1) {
114 for (off = 1, x = 1; x < w - 1; ++x, off++)
115 highlight(&a->surface, data + off,
116 data + off + (h-1) * w,
117 a->surface.relief==RR_RELIEF_RAISED);
118 for (off = 0, x = 0; x < h; ++x, off++)
119 highlight(&a->surface, data + off * w,
120 data + off * w + w - 1,
121 a->surface.relief==RR_RELIEF_RAISED);
124 if (a->surface.bevel == RR_BEVEL_2) {
125 for (off = 2, x = 2; x < w - 2; ++x, off++)
126 highlight(&a->surface, data + off + w,
127 data + off + (h-2) * w,
128 a->surface.relief==RR_RELIEF_RAISED);
129 for (off = 1, x = 1; x < h-1; ++x, off++)
130 highlight(&a->surface, data + off * w + 1,
131 data + off * w + w - 2,
132 a->surface.relief==RR_RELIEF_RAISED);
137 static void highlight(RrSurface *s, RrPixel32 *x, RrPixel32 *y, gboolean raised)
141 RrPixel32 *up, *down;
150 r = (*up >> RrDefaultRedOffset) & 0xFF;
151 r += (r * s->bevel_light_adjust) >> 8;
152 g = (*up >> RrDefaultGreenOffset) & 0xFF;
153 g += (g * s->bevel_light_adjust) >> 8;
154 b = (*up >> RrDefaultBlueOffset) & 0xFF;
155 b += (b * s->bevel_light_adjust) >> 8;
156 if (r > 0xFF) r = 0xFF;
157 if (g > 0xFF) g = 0xFF;
158 if (b > 0xFF) b = 0xFF;
159 *up = (r << RrDefaultRedOffset) + (g << RrDefaultGreenOffset)
160 + (b << RrDefaultBlueOffset);
162 r = (*down >> RrDefaultRedOffset) & 0xFF;
163 r -= (r * s->bevel_dark_adjust) >> 8;
164 g = (*down >> RrDefaultGreenOffset) & 0xFF;
165 g -= (g * s->bevel_dark_adjust) >> 8;
166 b = (*down >> RrDefaultBlueOffset) & 0xFF;
167 b -= (b * s->bevel_dark_adjust) >> 8;
168 *down = (r << RrDefaultRedOffset) + (g << RrDefaultGreenOffset)
169 + (b << RrDefaultBlueOffset);
172 static void create_bevel_colors(RrAppearance *l)
177 r = l->surface.primary->r;
178 r += (r * l->surface.bevel_light_adjust) >> 8;
179 g = l->surface.primary->g;
180 g += (g * l->surface.bevel_light_adjust) >> 8;
181 b = l->surface.primary->b;
182 b += (b * l->surface.bevel_light_adjust) >> 8;
183 if (r > 0xFF) r = 0xFF;
184 if (g > 0xFF) g = 0xFF;
185 if (b > 0xFF) b = 0xFF;
186 g_assert(!l->surface.bevel_light);
187 l->surface.bevel_light = RrColorNew(l->inst, r, g, b);
190 r = l->surface.primary->r;
191 r -= (r * l->surface.bevel_dark_adjust) >> 8;
192 g = l->surface.primary->g;
193 g -= (g * l->surface.bevel_dark_adjust) >> 8;
194 b = l->surface.primary->b;
195 b -= (b * l->surface.bevel_dark_adjust) >> 8;
196 g_assert(!l->surface.bevel_dark);
197 l->surface.bevel_dark = RrColorNew(l->inst, r, g, b);
200 /*! Repeat the first pixel over the entire block of memory
201 @param start The block of memory. start[0] will be copied
202 to the rest of the block.
203 @param w The width of the block of memory (including the already-set first
206 static inline void repeat_pixel(RrPixel32 *start, gint w)
213 /* for really small things, just copy ourselves */
215 for (x = w-1; x > 0; --x)
219 /* for >= 8, then use O(log n) memcpy's... */
222 gint lenbytes = 4 * sizeof(RrPixel32);
224 /* copy the first 3 * 32 bits (3 words) ourselves - then we have
225 3 + the original 1 = 4 words to make copies of at a time
227 this is faster than doing memcpy for 1 or 2 words at a time
229 for (x = 3; x > 0; --x)
232 for (x = w - 4; x > 0;) {
233 memcpy(dest, start, lenbytes);
240 lenbytes = x * sizeof(RrPixel32);
246 static void gradient_parentrelative(RrAppearance *a, gint w, gint h)
248 RrPixel32 *source, *dest;
249 gint sw, sh, partial_w, partial_h, i;
251 g_assert (a->surface.parent);
252 g_assert (a->surface.parent->w);
254 sw = a->surface.parent->w;
255 sh = a->surface.parent->h;
257 /* This is a little hack. When a texture is parentrelative, and the same
258 area as the parent, and has a bevel, it will draw its bevel on top
259 of the parent's, amplifying it. So instead, rerender the child with
260 the parent's settings, but the child's bevel and interlace */
261 if (a->surface.relief != RR_RELIEF_FLAT &&
262 (a->surface.parent->surface.relief != RR_RELIEF_FLAT ||
263 a->surface.parent->surface.border) &&
264 !a->surface.parentx && !a->surface.parenty &&
267 RrSurface old = a->surface;
268 a->surface = a->surface.parent->surface;
270 /* turn these off for the parent */
271 a->surface.relief = RR_RELIEF_FLAT;
272 a->surface.border = FALSE;
274 a->surface.pixel_data = old.pixel_data;
279 source = (a->surface.parent->surface.pixel_data +
280 a->surface.parentx + sw * a->surface.parenty);
281 dest = a->surface.pixel_data;
283 if (a->surface.parentx + w > sw) {
284 partial_w = sw - a->surface.parentx;
285 } else partial_w = w;
287 if (a->surface.parenty + h > sh) {
288 partial_h = sh - a->surface.parenty;
289 } else partial_h = h;
291 for (i = 0; i < partial_h; i++, source += sw, dest += w) {
292 memcpy(dest, source, partial_w * sizeof(RrPixel32));
297 static void gradient_solid(RrAppearance *l, gint w, gint h)
301 RrPixel32 *data = l->surface.pixel_data;
302 RrSurface *sp = &l->surface;
303 gint left = 0, top = 0, right = w - 1, bottom = h - 1;
305 pix = (sp->primary->r << RrDefaultRedOffset)
306 + (sp->primary->g << RrDefaultGreenOffset)
307 + (sp->primary->b << RrDefaultBlueOffset);
309 for (i = 0; i < w * h; i++)
315 XFillRectangle(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->primary),
318 switch (sp->relief) {
319 case RR_RELIEF_RAISED:
321 create_bevel_colors(l);
325 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
326 left, bottom, right, bottom);
327 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
328 right, bottom, right, top);
330 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
331 left, top, right, top);
332 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
333 left, bottom, left, top);
336 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
337 left + 2, bottom - 1, right - 2, bottom - 1);
338 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
339 right - 1, bottom - 1, right - 1, top + 1);
341 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
342 left + 2, top + 1, right - 2, top + 1);
343 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
344 left + 1, bottom - 1, left + 1, top + 1);
347 g_assert_not_reached(); /* unhandled BevelType */
350 case RR_RELIEF_SUNKEN:
352 create_bevel_colors(l);
356 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
357 left, bottom, right, bottom);
358 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
359 right, bottom, right, top);
361 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
362 left, top, right, top);
363 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
364 left, bottom, left, top);
367 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
368 left + 2, bottom - 1, right - 2, bottom - 1);
369 XDrawLine(RrDisplay(l->inst), l->pixmap,RrColorGC(sp->bevel_light),
370 right - 1, bottom - 1, right - 1, top + 1);
372 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
373 left + 2, top + 1, right - 2, top + 1);
374 XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->bevel_dark),
375 left + 1, bottom - 1, left + 1, top + 1);
378 g_assert_not_reached(); /* unhandled BevelType */
383 XDrawRectangle(RrDisplay(l->inst), l->pixmap,
384 RrColorGC(sp->border_color),
385 left, top, right, bottom);
389 g_assert_not_reached(); /* unhandled ReliefType */
393 /* * * * * * * * * * * * * * GRADIENT MAGIC WOOT * * * * * * * * * * * * * * */
397 gint len##x, cdelta##x[3], error##x[3] = { 0, 0, 0 }, inc##x[3]; \
398 gboolean bigslope##x[3] /* color slope > 1 */
400 #define SETUP(x, from, to, w) \
403 color##x[0] = from->r; \
404 color##x[1] = from->g; \
405 color##x[2] = from->b; \
407 cdelta##x[0] = to->r - from->r; \
408 cdelta##x[1] = to->g - from->g; \
409 cdelta##x[2] = to->b - from->b; \
411 if (cdelta##x[0] < 0) { \
412 cdelta##x[0] = -cdelta##x[0]; \
416 if (cdelta##x[1] < 0) { \
417 cdelta##x[1] = -cdelta##x[1]; \
421 if (cdelta##x[2] < 0) { \
422 cdelta##x[2] = -cdelta##x[2]; \
426 bigslope##x[0] = cdelta##x[0] > w;\
427 bigslope##x[1] = cdelta##x[1] > w;\
428 bigslope##x[2] = cdelta##x[2] > w
430 #define COLOR_RR(x, c) \
431 c->r = color##x[0]; \
432 c->g = color##x[1]; \
436 ((color##x[0] << RrDefaultRedOffset) + \
437 (color##x[1] << RrDefaultGreenOffset) + \
438 (color##x[2] << RrDefaultBlueOffset))
440 #define INCREMENT(x, i) \
446 for (i = 2; i >= 0; --i) { \
447 if (!cdelta##x[i]) continue; \
449 if (!bigslope##x[i]) { \
450 /* Y (color) is dependant on X */ \
451 error##x[i] += cdelta##x[i]; \
452 if ((error##x[i] << 1) >= len##x) { \
453 color##x[i] += INCREMENT(x, i); \
454 error##x[i] -= len##x; \
457 /* X is dependant on Y (color) */ \
459 color##x[i] += INCREMENT(x, i); \
460 error##x[i] += len##x; \
461 if ((error##x[i] << 1) >= cdelta##x[i]) { \
462 error##x[i] -= cdelta##x[i]; \
470 static void gradient_splitvertical(RrAppearance *a, gint w, gint h)
473 RrSurface *sf = &a->surface;
475 gint y1sz, y2sz, y3sz;
481 /* if h <= 5, then a 0 or 1px middle gradient.
482 if h > 5, then always a 1px middle gradient.
486 y2sz = (h < 3 ? 0 : h % 2);
490 y1sz = h/2 - (1 - (h % 2));
495 SETUP(y1, sf->split_primary, sf->primary, y1sz);
497 /* setup to get the colors _in between_ these other 2 */
498 SETUP(y2, sf->primary, sf->secondary, y2sz + 2);
499 NEXT(y2); /* skip the first one, its the same as the last of y1 */
501 SETUP(y3, sf->secondary, sf->split_secondary, y3sz);
503 /* find the color for the first pixel of each row first */
504 data = sf->pixel_data;
506 for (y1 = y1sz-1; y1 > 0; --y1) {
513 for (y2 = y2sz-1; y2 > 0; --y2) {
520 for (y3 = y3sz-1; y3 > 0; --y3) {
527 /* copy the first pixels into the whole rows */
528 data = sf->pixel_data;
529 for (y1 = h; y1 > 0; --y1) {
530 repeat_pixel(data, w);
535 static void gradient_horizontal(RrSurface *sf, gint w, gint h)
538 RrPixel32 *data = sf->pixel_data, *datav;
541 SETUP(x, sf->primary, sf->secondary, w);
544 for (x = w - 1; x > 0; --x) { /* 0 -> w - 1 */
552 for (y = h - 1; y > 0; --y) { /* 1 -> h */
553 memcpy(datav, data, w * sizeof(RrPixel32));
558 static void gradient_mirrorhorizontal(RrSurface *sf, gint w, gint h)
560 gint x, y, half1, half2;
561 RrPixel32 *data = sf->pixel_data, *datav;
568 SETUP(x, sf->primary, sf->secondary, half1);
570 for (x = half1 - 1; x > 0; --x) { /* 0 -> half1 - 1 */
579 SETUP(x, sf->secondary, sf->primary, half2);
580 for (x = half2 - 1; x > 0; --x) { /* 0 -> half2 - 1 */
589 for (y = h - 1; y > 0; --y) { /* 1 -> h */
590 memcpy(datav, data, w * sizeof(RrPixel32));
595 static void gradient_vertical(RrSurface *sf, gint w, gint h)
601 SETUP(y, sf->primary, sf->secondary, h);
603 /* find the color for the first pixel of each row first */
604 data = sf->pixel_data;
606 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
613 /* copy the first pixels into the whole rows */
614 data = sf->pixel_data;
615 for (y = h; y > 0; --y) {
616 repeat_pixel(data, w);
622 static void gradient_diagonal(RrSurface *sf, gint w, gint h)
625 RrPixel32 *data = sf->pixel_data;
633 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
634 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
635 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
637 SETUP(lefty, sf->primary, (&extracorner), h);
638 SETUP(righty, (&extracorner), sf->secondary, h);
640 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
641 COLOR_RR(lefty, (&left));
642 COLOR_RR(righty, (&right));
644 SETUP(x, (&left), (&right), w);
646 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
647 *(data++) = COLOR(x);
651 *(data++) = COLOR(x);
656 COLOR_RR(lefty, (&left));
657 COLOR_RR(righty, (&right));
659 SETUP(x, (&left), (&right), w);
661 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
662 *(data++) = COLOR(x);
669 static void gradient_crossdiagonal(RrSurface *sf, gint w, gint h)
672 RrPixel32 *data = sf->pixel_data;
680 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
681 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
682 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
684 SETUP(lefty, (&extracorner), sf->secondary, h);
685 SETUP(righty, sf->primary, (&extracorner), h);
687 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
688 COLOR_RR(lefty, (&left));
689 COLOR_RR(righty, (&right));
691 SETUP(x, (&left), (&right), w);
693 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
694 *(data++) = COLOR(x);
698 *(data++) = COLOR(x);
703 COLOR_RR(lefty, (&left));
704 COLOR_RR(righty, (&right));
706 SETUP(x, (&left), (&right), w);
708 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
709 *(data++) = COLOR(x);
716 static void gradient_pyramid(RrSurface *sf, gint inw, gint inh)
718 gint x, y, w = (inw >> 1) + 1, h = (inh >> 1) + 1;
719 RrPixel32 *data = sf->pixel_data;
720 RrPixel32 *end = data + inw*inh - 1;
729 extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
730 extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
731 extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
733 SETUP(lefty, (&extracorner), sf->secondary, h);
734 SETUP(righty, sf->primary, (&extracorner), h);
736 for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
737 COLOR_RR(lefty, (&left));
738 COLOR_RR(righty, (&right));
740 SETUP(x, (&left), (&right), w);
742 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
745 *(data+inw-x) = current;
747 *(end-(inw-x)) = current;
753 *(data+inw-x) = current;
755 *(end-(inw-x)) = current;
763 COLOR_RR(lefty, (&left));
764 COLOR_RR(righty, (&right));
766 SETUP(x, (&left), (&right), w);
768 for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
771 *(data+inw-x) = current;
773 *(end-(inw-x)) = current;
779 *(data+inw-x) = current;
781 *(end-(inw-x)) = current;