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Dogcows Code - chaz/openbox/blob - render/color.c
1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
3 color.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 #include <X11/Xutil.h>
29 void RrColorAllocateGC(RrColor
*in
)
33 gcv
.foreground
= in
->pixel
;
34 gcv
.cap_style
= CapProjecting
;
35 in
->gc
= XCreateGC(RrDisplay(in
->inst
),
36 RrRootWindow(in
->inst
),
37 GCForeground
| GCCapStyle
, &gcv
);
40 RrColor
*RrColorParse(const RrInstance
*inst
, gchar
*colorname
)
44 g_assert(colorname
!= NULL
);
45 /* get rgb values from colorname */
51 if (!XParseColor(RrDisplay(inst
), RrColormap(inst
), colorname
, &xcol
)) {
52 g_warning("unable to parse color '%s'", colorname
);
55 return RrColorNew(inst
, xcol
.red
>> 8, xcol
.green
>> 8, xcol
.blue
>> 8);
58 /*#define NO_COLOR_CACHE*/
63 RrColor
*RrColorNew(const RrInstance
*inst
, gint r
, gint g
, gint b
)
65 /* this should be replaced with something far cooler */
70 key
= (r
<< 24) + (g
<< 16) + (b
<< 8);
71 #ifndef NO_COLOR_CACHE
72 if ((out
= g_hash_table_lookup(RrColorHash(inst
), &key
))) {
76 xcol
.red
= (r
<< 8) | r
;
77 xcol
.green
= (g
<< 8) | g
;
78 xcol
.blue
= (b
<< 8) | b
;
79 if (XAllocColor(RrDisplay(inst
), RrColormap(inst
), &xcol
)) {
80 out
= g_new(RrColor
, 1);
82 out
->r
= xcol
.red
>> 8;
83 out
->g
= xcol
.green
>> 8;
84 out
->b
= xcol
.blue
>> 8;
86 out
->pixel
= xcol
.pixel
;
92 #ifndef NO_COLOR_CACHE
93 g_hash_table_insert(RrColorHash(inst
), &out
->key
, out
);
100 void RrColorFree(RrColor
*c
)
103 if (--c
->refcount
< 1) {
104 #ifndef NO_COLOR_CACHE
105 g_assert(g_hash_table_lookup(RrColorHash(c
->inst
), &c
->key
));
106 g_hash_table_remove(RrColorHash(c
->inst
), &c
->key
);
108 if (c
->pixel
) XFreeColors(RrDisplay(c
->inst
), RrColormap(c
->inst
),
110 if (c
->gc
) XFreeGC(RrDisplay(c
->inst
), c
->gc
);
116 void RrReduceDepth(const RrInstance
*inst
, RrPixel32
*data
, XImage
*im
)
120 RrPixel32
*p32
= (RrPixel32
*) im
->data
;
121 RrPixel16
*p16
= (RrPixel16
*) im
->data
;
122 guchar
*p8
= (guchar
*)im
->data
;
123 switch (im
->bits_per_pixel
) {
125 if ((RrRedOffset(inst
) != RrDefaultRedOffset
) ||
126 (RrBlueOffset(inst
) != RrDefaultBlueOffset
) ||
127 (RrGreenOffset(inst
) != RrDefaultGreenOffset
)) {
128 for (y
= 0; y
< im
->height
; y
++) {
129 for (x
= 0; x
< im
->width
; x
++) {
130 r
= (data
[x
] >> RrDefaultRedOffset
) & 0xFF;
131 g
= (data
[x
] >> RrDefaultGreenOffset
) & 0xFF;
132 b
= (data
[x
] >> RrDefaultBlueOffset
) & 0xFF;
133 p32
[x
] = (r
<< RrRedOffset(inst
))
134 + (g
<< RrGreenOffset(inst
))
135 + (b
<< RrBlueOffset(inst
));
140 } else im
->data
= (gchar
*) data
;
143 for (y
= 0; y
< im
->height
; y
++) {
144 for (x
= 0; x
< im
->width
; x
++) {
145 r
= (data
[x
] >> RrDefaultRedOffset
) & 0xFF;
146 r
= r
>> RrRedShift(inst
);
147 g
= (data
[x
] >> RrDefaultGreenOffset
) & 0xFF;
148 g
= g
>> RrGreenShift(inst
);
149 b
= (data
[x
] >> RrDefaultBlueOffset
) & 0xFF;
150 b
= b
>> RrBlueShift(inst
);
151 p16
[x
] = (r
<< RrRedOffset(inst
))
152 + (g
<< RrGreenOffset(inst
))
153 + (b
<< RrBlueOffset(inst
));
156 p16
+= im
->bytes_per_line
/2;
160 g_assert(RrVisual(inst
)->class != TrueColor
);
161 for (y
= 0; y
< im
->height
; y
++) {
162 for (x
= 0; x
< im
->width
; x
++) {
163 p8
[x
] = RrPickColor(inst
,
164 data
[x
] >> RrDefaultRedOffset
,
165 data
[x
] >> RrDefaultGreenOffset
,
166 data
[x
] >> RrDefaultBlueOffset
)->pixel
;
169 p8
+= im
->bytes_per_line
;
173 g_warning("your bit depth is currently unhandled\n");
177 XColor
*RrPickColor(const RrInstance
*inst
, gint r
, gint g
, gint b
)
179 r
= (r
& 0xff) >> (8-RrPseudoBPC(inst
));
180 g
= (g
& 0xff) >> (8-RrPseudoBPC(inst
));
181 b
= (b
& 0xff) >> (8-RrPseudoBPC(inst
));
182 return &RrPseudoColors(inst
)[(r
<< (2*RrPseudoBPC(inst
))) +
183 (g
<< (1*RrPseudoBPC(inst
))) +
187 static void swap_byte_order(XImage
*im
)
192 for (y
= 0; y
< im
->height
; ++y
) {
193 for (x
= 0; x
< im
->height
; ++x
) {
194 gchar
*c
= &im
->data
[di
+ x
* im
->bits_per_pixel
/ 8];
197 switch (im
->bits_per_pixel
) {
210 g_warning("Your bit depth is currently unhandled");
213 di
+= im
->bytes_per_line
;
216 if (im
->byte_order
== LSBFirst
)
217 im
->byte_order
= MSBFirst
;
219 im
->byte_order
= LSBFirst
;
222 void RrIncreaseDepth(const RrInstance
*inst
, RrPixel32
*data
, XImage
*im
)
226 RrPixel32
*p32
= (RrPixel32
*) im
->data
;
227 RrPixel16
*p16
= (RrPixel16
*) im
->data
;
228 guchar
*p8
= (guchar
*)im
->data
;
230 if (im
->byte_order
!= LSBFirst
)
233 switch (im
->bits_per_pixel
) {
235 for (y
= 0; y
< im
->height
; y
++) {
236 for (x
= 0; x
< im
->width
; x
++) {
237 r
= (p32
[x
] >> RrRedOffset(inst
)) & 0xff;
238 g
= (p32
[x
] >> RrGreenOffset(inst
)) & 0xff;
239 b
= (p32
[x
] >> RrBlueOffset(inst
)) & 0xff;
240 data
[x
] = (r
<< RrDefaultRedOffset
)
241 + (g
<< RrDefaultGreenOffset
)
242 + (b
<< RrDefaultBlueOffset
)
243 + (0xff << RrDefaultAlphaOffset
);
246 p32
+= im
->bytes_per_line
/4;
250 for (y
= 0; y
< im
->height
; y
++) {
251 for (x
= 0; x
< im
->width
; x
++) {
252 r
= (p16
[x
] & RrRedMask(inst
)) >>
255 g
= (p16
[x
] & RrGreenMask(inst
)) >>
256 RrGreenOffset(inst
) <<
258 b
= (p16
[x
] & RrBlueMask(inst
)) >>
259 RrBlueOffset(inst
) <<
261 data
[x
] = (r
<< RrDefaultRedOffset
)
262 + (g
<< RrDefaultGreenOffset
)
263 + (b
<< RrDefaultBlueOffset
)
264 + (0xff << RrDefaultAlphaOffset
);
267 p16
+= im
->bytes_per_line
/2;
271 g_warning("this image bit depth is currently unhandled");
274 for (y
= 0; y
< im
->height
; y
++) {
275 for (x
= 0; x
< im
->width
; x
++) {
276 if (!(((p8
[x
/ 8]) >> (x
% 8)) & 0x1))
277 data
[x
] = 0xff << RrDefaultAlphaOffset
; /* black */
279 data
[x
] = 0xffffffff; /* white */
282 p8
+= im
->bytes_per_line
;
286 g_warning("this image bit depth is currently unhandled");
290 gint
RrColorRed(const RrColor
*c
)
295 gint
RrColorGreen(const RrColor
*c
)
300 gint
RrColorBlue(const RrColor
*c
)
305 gulong
RrColorPixel(const RrColor
*c
)
310 GC
RrColorGC(RrColor
*c
)
313 RrColorAllocateGC(c
);
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