1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
3 gradient.c for the Openbox window manager
4 Copyright (c) 2003 Ben Jansens
5 Copyright (c) 2003 Derek Foreman
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 See the COPYING file for a copy of the GNU General Public License.
25 static void highlight(RrPixel32
*x
, RrPixel32
*y
, gboolean raised
);
26 static void gradient_solid(RrAppearance
*l
, gint w
, gint h
);
27 static void gradient_split(RrAppearance
*a
, gint w
, gint h
);
28 static void gradient_vertical(RrSurface
*sf
, gint w
, gint h
);
29 static void gradient_horizontal(RrSurface
*sf
, gint w
, gint h
);
30 static void gradient_osx(RrSurface
*sf
, gint w
, gint h
);
31 static void gradient_diagonal(RrSurface
*sf
, gint w
, gint h
);
32 static void gradient_crossdiagonal(RrSurface
*sf
, gint w
, gint h
);
33 static void gradient_pyramid(RrSurface
*sf
, gint inw
, gint inh
);
35 void RrRender(RrAppearance
*a
, gint w
, gint h
)
37 RrPixel32
*data
= a
->surface
.pixel_data
;
42 switch (a
->surface
.grad
) {
43 case RR_SURFACE_SOLID
:
44 gradient_solid(a
, w
, h
);
46 case RR_SURFACE_SPLIT
:
47 gradient_split(a
, w
, h
);
49 case RR_SURFACE_VERTICAL
:
50 gradient_vertical(&a
->surface
, w
, h
);
52 case RR_SURFACE_HORIZONTAL
:
53 gradient_horizontal(&a
->surface
, w
, h
);
56 gradient_osx(&a
->surface
, w
, h
);
58 case RR_SURFACE_DIAGONAL
:
59 gradient_diagonal(&a
->surface
, w
, h
);
61 case RR_SURFACE_CROSS_DIAGONAL
:
62 gradient_crossdiagonal(&a
->surface
, w
, h
);
64 case RR_SURFACE_PYRAMID
:
65 gradient_pyramid(&a
->surface
, w
, h
);
68 g_assert_not_reached(); /* unhandled gradient */
72 if (a
->surface
.interlaced
) {
76 r
= a
->surface
.interlace_color
->r
;
77 g
= a
->surface
.interlace_color
->g
;
78 b
= a
->surface
.interlace_color
->b
;
79 current
= (r
<< RrDefaultRedOffset
)
80 + (g
<< RrDefaultGreenOffset
)
81 + (b
<< RrDefaultBlueOffset
);
83 for (i
= 0; i
< h
; i
+= 2, p
+= w
)
84 for (x
= 0; x
< w
; ++x
, ++p
)
88 if (a
->surface
.relief
== RR_RELIEF_FLAT
&& a
->surface
.border
) {
89 r
= a
->surface
.border_color
->r
;
90 g
= a
->surface
.border_color
->g
;
91 b
= a
->surface
.border_color
->b
;
92 current
= (r
<< RrDefaultRedOffset
)
93 + (g
<< RrDefaultGreenOffset
)
94 + (b
<< RrDefaultBlueOffset
);
95 for (off
= 0, x
= 0; x
< w
; ++x
, off
++) {
96 *(data
+ off
) = current
;
97 *(data
+ off
+ ((h
-1) * w
)) = current
;
99 for (off
= 0, x
= 0; x
< h
; ++x
, off
++) {
100 *(data
+ (off
* w
)) = current
;
101 *(data
+ (off
* w
) + w
- 1) = current
;
105 if (a
->surface
.relief
!= RR_RELIEF_FLAT
) {
106 if (a
->surface
.bevel
== RR_BEVEL_1
) {
107 for (off
= 1, x
= 1; x
< w
- 1; ++x
, off
++)
108 highlight(data
+ off
,
109 data
+ off
+ (h
-1) * w
,
110 a
->surface
.relief
==RR_RELIEF_RAISED
);
111 for (off
= 0, x
= 0; x
< h
; ++x
, off
++)
112 highlight(data
+ off
* w
,
113 data
+ off
* w
+ w
- 1,
114 a
->surface
.relief
==RR_RELIEF_RAISED
);
117 if (a
->surface
.bevel
== RR_BEVEL_2
) {
118 for (off
= 2, x
= 2; x
< w
- 2; ++x
, off
++)
119 highlight(data
+ off
+ w
,
120 data
+ off
+ (h
-2) * w
,
121 a
->surface
.relief
==RR_RELIEF_RAISED
);
122 for (off
= 1, x
= 1; x
< h
-1; ++x
, off
++)
123 highlight(data
+ off
* w
+ 1,
124 data
+ off
* w
+ w
- 2,
125 a
->surface
.relief
==RR_RELIEF_RAISED
);
130 static void highlight(RrPixel32
*x
, RrPixel32
*y
, gboolean raised
)
134 RrPixel32
*up
, *down
;
142 r
= (*up
>> RrDefaultRedOffset
) & 0xFF;
144 g
= (*up
>> RrDefaultGreenOffset
) & 0xFF;
146 b
= (*up
>> RrDefaultBlueOffset
) & 0xFF;
148 if (r
> 0xFF) r
= 0xFF;
149 if (g
> 0xFF) g
= 0xFF;
150 if (b
> 0xFF) b
= 0xFF;
151 *up
= (r
<< RrDefaultRedOffset
) + (g
<< RrDefaultGreenOffset
)
152 + (b
<< RrDefaultBlueOffset
);
154 r
= (*down
>> RrDefaultRedOffset
) & 0xFF;
155 r
= (r
>> 1) + (r
>> 2);
156 g
= (*down
>> RrDefaultGreenOffset
) & 0xFF;
157 g
= (g
>> 1) + (g
>> 2);
158 b
= (*down
>> RrDefaultBlueOffset
) & 0xFF;
159 b
= (b
>> 1) + (b
>> 2);
160 *down
= (r
<< RrDefaultRedOffset
) + (g
<< RrDefaultGreenOffset
)
161 + (b
<< RrDefaultBlueOffset
);
164 static void create_bevel_colors(RrAppearance
*l
)
169 r
= l
->surface
.primary
->r
;
171 g
= l
->surface
.primary
->g
;
173 b
= l
->surface
.primary
->b
;
175 if (r
> 0xFF) r
= 0xFF;
176 if (g
> 0xFF) g
= 0xFF;
177 if (b
> 0xFF) b
= 0xFF;
178 g_assert(!l
->surface
.bevel_light
);
179 l
->surface
.bevel_light
= RrColorNew(l
->inst
, r
, g
, b
);
182 r
= l
->surface
.primary
->r
;
183 r
= (r
>> 1) + (r
>> 2);
184 g
= l
->surface
.primary
->g
;
185 g
= (g
>> 1) + (g
>> 2);
186 b
= l
->surface
.primary
->b
;
187 b
= (b
>> 1) + (b
>> 2);
188 g_assert(!l
->surface
.bevel_dark
);
189 l
->surface
.bevel_dark
= RrColorNew(l
->inst
, r
, g
, b
);
192 static void gradient_solid(RrAppearance
*l
, gint w
, gint h
)
196 RrSurface
*sp
= &l
->surface
;
197 gint left
= 0, top
= 0, right
= w
- 1, bottom
= h
- 1;
199 pix
= (sp
->primary
->r
<< RrDefaultRedOffset
)
200 + (sp
->primary
->g
<< RrDefaultGreenOffset
)
201 + (sp
->primary
->b
<< RrDefaultBlueOffset
);
203 for (a
= 0; a
< w
; a
++)
204 for (b
= 0; b
< h
; b
++)
205 sp
->pixel_data
[a
+ b
* w
] = pix
;
207 XFillRectangle(RrDisplay(l
->inst
), l
->pixmap
, RrColorGC(sp
->primary
),
210 if (sp
->interlaced
) {
211 for (i
= 0; i
< h
; i
+= 2)
212 XDrawLine(RrDisplay(l
->inst
), l
->pixmap
,
213 RrColorGC(sp
->interlace_color
),
217 switch (sp
->relief
) {
218 case RR_RELIEF_RAISED
:
220 create_bevel_colors(l
);
224 XDrawLine(RrDisplay(l
->inst
), l
->pixmap
, RrColorGC(sp
->bevel_dark
),
225 left
, bottom
, right
, bottom
);
226 XDrawLine(RrDisplay(l
->inst
), l
->pixmap
, RrColorGC(sp
->bevel_dark
),
227 right
, bottom
, right
, top
);
229 XDrawLine(RrDisplay(l
->inst
), l
->pixmap
,RrColorGC(sp
->bevel_light
),
230 left
, top
, right
, top
);
231 XDrawLine(RrDisplay(l
->inst
), l
->pixmap
,RrColorGC(sp
->bevel_light
),
232 left
, bottom
, left
, top
);
235 XDrawLine(RrDisplay(l
->inst
), l
->pixmap
, RrColorGC(sp
->bevel_dark
),
236 left
+ 1, bottom
- 2, right
- 2, bottom
- 2);
237 XDrawLine(RrDisplay(l
->inst
), l
->pixmap
, RrColorGC(sp
->bevel_dark
),
238 right
- 2, bottom
- 2, right
- 2, top
+ 1);
240 XDrawLine(RrDisplay(l
->inst
), l
->pixmap
,RrColorGC(sp
->bevel_light
),
241 left
+ 1, top
+ 1, right
- 2, top
+ 1);
242 XDrawLine(RrDisplay(l
->inst
), l
->pixmap
,RrColorGC(sp
->bevel_light
),
243 left
+ 1, bottom
- 2, left
+ 1, top
+ 1);
246 g_assert_not_reached(); /* unhandled BevelType */
249 case RR_RELIEF_SUNKEN
:
251 create_bevel_colors(l
);
255 XDrawLine(RrDisplay(l
->inst
), l
->pixmap
,RrColorGC(sp
->bevel_light
),
256 left
, bottom
, right
, bottom
);
257 XDrawLine(RrDisplay(l
->inst
), l
->pixmap
,RrColorGC(sp
->bevel_light
),
258 right
, bottom
, right
, top
);
260 XDrawLine(RrDisplay(l
->inst
), l
->pixmap
, RrColorGC(sp
->bevel_dark
),
261 left
, top
, right
, top
);
262 XDrawLine(RrDisplay(l
->inst
), l
->pixmap
, RrColorGC(sp
->bevel_dark
),
263 left
, bottom
, left
, top
);
266 XDrawLine(RrDisplay(l
->inst
), l
->pixmap
,RrColorGC(sp
->bevel_light
),
267 left
+ 1, bottom
- 2, right
- 2, bottom
- 2);
268 XDrawLine(RrDisplay(l
->inst
), l
->pixmap
,RrColorGC(sp
->bevel_light
),
269 right
- 2, bottom
- 2, right
- 2, top
+ 1);
271 XDrawLine(RrDisplay(l
->inst
), l
->pixmap
, RrColorGC(sp
->bevel_dark
),
272 left
+ 1, top
+ 1, right
- 2, top
+ 1);
273 XDrawLine(RrDisplay(l
->inst
), l
->pixmap
, RrColorGC(sp
->bevel_dark
),
274 left
+ 1, bottom
- 2, left
+ 1, top
+ 1);
278 g_assert_not_reached(); /* unhandled BevelType */
283 XDrawRectangle(RrDisplay(l
->inst
), l
->pixmap
,
284 RrColorGC(sp
->border_color
),
285 left
, top
, right
, bottom
);
289 g_assert_not_reached(); /* unhandled ReliefType */
293 /* * * * * * * * * * * * * * GRADIENT MAGIC WOOT * * * * * * * * * * * * * * */
297 gint len##x, cdelta##x[3], error##x[3] = { 0, 0, 0 }, inc##x[3]; \
298 gboolean bigslope##x[3] /* color slope > 1 */
300 #define SETUP(x, from, to, w) \
303 color##x[0] = from->r; \
304 color##x[1] = from->g; \
305 color##x[2] = from->b; \
307 cdelta##x[0] = to->r - from->r; \
308 cdelta##x[1] = to->g - from->g; \
309 cdelta##x[2] = to->b - from->b; \
311 if (cdelta##x[0] < 0) { \
312 cdelta##x[0] = -cdelta##x[0]; \
316 if (cdelta##x[1] < 0) { \
317 cdelta##x[1] = -cdelta##x[1]; \
321 if (cdelta##x[2] < 0) { \
322 cdelta##x[2] = -cdelta##x[2]; \
326 bigslope##x[0] = cdelta##x[0] > w;\
327 bigslope##x[1] = cdelta##x[1] > w;\
328 bigslope##x[2] = cdelta##x[2] > w
330 #define COLOR_RR(x, c) \
331 c->r = color##x[0]; \
332 c->g = color##x[1]; \
336 ((color##x[0] << RrDefaultRedOffset) + \
337 (color##x[1] << RrDefaultGreenOffset) + \
338 (color##x[2] << RrDefaultBlueOffset))
340 #define INCREMENT(x, i) \
346 for (i = 2; i >= 0; --i) { \
347 if (!cdelta##x[i]) continue; \
349 if (!bigslope##x[i]) { \
350 /* Y (color) is dependant on X */ \
351 error##x[i] += cdelta##x[i]; \
352 if ((error##x[i] << 1) >= len##x) { \
353 color##x[i] += INCREMENT(x, i); \
354 error##x[i] -= len##x; \
357 /* X is dependant on Y (color) */ \
359 color##x[i] += INCREMENT(x, i); \
360 error##x[i] += len##x; \
361 if ((error##x[i] << 1) >= cdelta##x[i]) { \
362 error##x[i] -= cdelta##x[i]; \
370 static void gradient_split(RrAppearance
*a
, gint w
, gint h
)
372 gint x
, y1
, y3
, r
, g
, b
;
373 RrSurface
*sf
= &a
->surface
;
374 RrPixel32
*data
= sf
->pixel_data
;
376 RrColor
*primary_light
, *secondary_light
;
384 if (r
> 0xFF) r
= 0xFF;
385 if (g
> 0xFF) g
= 0xFF;
386 if (b
> 0xFF) b
= 0xFF;
387 primary_light
= RrColorNew(a
->inst
, r
, g
, b
);
389 r
= sf
->secondary
->r
;
391 g
= sf
->secondary
->g
;
393 b
= sf
->secondary
->b
;
395 if (r
> 0xFF) r
= 0xFF;
396 if (g
> 0xFF) g
= 0xFF;
397 if (b
> 0xFF) b
= 0xFF;
398 secondary_light
= RrColorNew(a
->inst
, r
, g
, b
);
401 SETUP(y1
, primary_light
, sf
->primary
, (h
/ 2) -1);
404 SETUP(y3
, sf
->secondary
, secondary_light
, (h
/ 2) -1);
406 for (y1
= h
- 1; y1
> (h
/ 2) -1; --y1
) { /* 0 -> h-1 */
408 for (x
= w
- 1; x
>= 0; --x
) /* 0 -> w */
415 for (y3
= (h
/ 2) - 1; y3
> 0; --y3
) {
417 for (x
= w
- 1; x
>= 0; --x
)
424 for (x
= w
- 1; x
>= 0; --x
) /* 0 -> w */
427 RrColorFree(primary_light
);
428 RrColorFree(secondary_light
);
431 static void gradient_horizontal(RrSurface
*sf
, gint w
, gint h
)
434 RrPixel32
*data
= sf
->pixel_data
, *datav
;
438 SETUP(x
, sf
->primary
, sf
->secondary
, w
);
440 for (x
= w
- 1; x
> 0; --x
) { /* 0 -> w-1 */
443 for (y
= h
- 1; y
>= 0; --y
) { /* 0 -> h */
452 for (y
= h
- 1; y
>= 0; --y
) /* 0 -> h */
453 *(data
+ y
* w
) = current
;
456 static void gradient_osx(RrSurface
*sf
, gint w
, gint h
)
459 RrPixel32
*data
= sf
->pixel_data
, *datav
;
463 SETUP(x
, sf
->primary
, sf
->secondary
, w
/2);
465 for (x
= w
- 1; x
> w
/2-1; --x
) { /* 0 -> w-1 */
468 for (y
= h
- 1; y
>= 0; --y
) { /* 0 -> h */
476 SETUP(x
, sf
->secondary
, sf
->primary
, w
/2);
477 for (x
= w
/2 - 1; x
> 0; --x
) { /* 0 -> w-1 */
480 for (y
= h
- 1; y
>= 0; --y
) { /* 0 -> h */
489 for (y
= h
- 1; y
>= 0; --y
) /* 0 -> h */
490 *(data
+ y
* w
) = current
;
493 static void gradient_vertical(RrSurface
*sf
, gint w
, gint h
)
496 RrPixel32
*data
= sf
->pixel_data
;
500 SETUP(y
, sf
->primary
, sf
->secondary
, h
);
502 for (y
= h
- 1; y
> 0; --y
) { /* 0 -> h-1 */
504 for (x
= w
- 1; x
>= 0; --x
) /* 0 -> w */
510 for (x
= w
- 1; x
>= 0; --x
) /* 0 -> w */
515 static void gradient_diagonal(RrSurface
*sf
, gint w
, gint h
)
518 RrPixel32
*data
= sf
->pixel_data
;
526 extracorner
.r
= (sf
->primary
->r
+ sf
->secondary
->r
) / 2;
527 extracorner
.g
= (sf
->primary
->g
+ sf
->secondary
->g
) / 2;
528 extracorner
.b
= (sf
->primary
->b
+ sf
->secondary
->b
) / 2;
530 SETUP(lefty
, sf
->primary
, (&extracorner
), h
);
531 SETUP(righty
, (&extracorner
), sf
->secondary
, h
);
533 for (y
= h
- 1; y
> 0; --y
) { /* 0 -> h-1 */
534 COLOR_RR(lefty
, (&left
));
535 COLOR_RR(righty
, (&right
));
537 SETUP(x
, (&left
), (&right
), w
);
539 for (x
= w
- 1; x
> 0; --x
) { /* 0 -> w-1 */
540 *(data
++) = COLOR(x
);
544 *(data
++) = COLOR(x
);
549 COLOR_RR(lefty
, (&left
));
550 COLOR_RR(righty
, (&right
));
552 SETUP(x
, (&left
), (&right
), w
);
554 for (x
= w
- 1; x
> 0; --x
) { /* 0 -> w-1 */
555 *(data
++) = COLOR(x
);
562 static void gradient_crossdiagonal(RrSurface
*sf
, gint w
, gint h
)
565 RrPixel32
*data
= sf
->pixel_data
;
573 extracorner
.r
= (sf
->primary
->r
+ sf
->secondary
->r
) / 2;
574 extracorner
.g
= (sf
->primary
->g
+ sf
->secondary
->g
) / 2;
575 extracorner
.b
= (sf
->primary
->b
+ sf
->secondary
->b
) / 2;
577 SETUP(lefty
, (&extracorner
), sf
->secondary
, h
);
578 SETUP(righty
, sf
->primary
, (&extracorner
), h
);
580 for (y
= h
- 1; y
> 0; --y
) { /* 0 -> h-1 */
581 COLOR_RR(lefty
, (&left
));
582 COLOR_RR(righty
, (&right
));
584 SETUP(x
, (&left
), (&right
), w
);
586 for (x
= w
- 1; x
> 0; --x
) { /* 0 -> w-1 */
587 *(data
++) = COLOR(x
);
591 *(data
++) = COLOR(x
);
596 COLOR_RR(lefty
, (&left
));
597 COLOR_RR(righty
, (&right
));
599 SETUP(x
, (&left
), (&right
), w
);
601 for (x
= w
- 1; x
> 0; --x
) { /* 0 -> w-1 */
602 *(data
++) = COLOR(x
);
609 static void gradient_pyramid(RrSurface
*sf
, gint inw
, gint inh
)
611 gint x
, y
, w
= (inw
>> 1) + 1, h
= (inh
>> 1) + 1;
612 RrPixel32
*data
= sf
->pixel_data
;
613 RrPixel32
*end
= data
+ inw
*inh
- 1;
622 extracorner
.r
= (sf
->primary
->r
+ sf
->secondary
->r
) / 2;
623 extracorner
.g
= (sf
->primary
->g
+ sf
->secondary
->g
) / 2;
624 extracorner
.b
= (sf
->primary
->b
+ sf
->secondary
->b
) / 2;
626 SETUP(lefty
, (&extracorner
), sf
->secondary
, h
);
627 SETUP(righty
, sf
->primary
, (&extracorner
), h
);
629 for (y
= h
- 1; y
> 0; --y
) { /* 0 -> h-1 */
630 COLOR_RR(lefty
, (&left
));
631 COLOR_RR(righty
, (&right
));
633 SETUP(x
, (&left
), (&right
), w
);
635 for (x
= w
- 1; x
> 0; --x
) { /* 0 -> w-1 */
638 *(data
+inw
-x
) = current
;
640 *(end
-(inw
-x
)) = current
;
646 *(data
+inw
-x
) = current
;
648 *(end
-(inw
-x
)) = current
;
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 */
664 *(data
+inw
-x
) = current
;
666 *(end
-(inw
-x
)) = current
;
672 *(data
+inw
-x
) = current
;
674 *(end
-(inw
-x
)) = current
;