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 g_assert(r >= 0 && r < 256);
71 g_assert(g >= 0 && g < 256);
72 g_assert(b >= 0 && b < 256);
74 key = (r << 24) + (g << 16) + (b << 8);
75 #ifndef NO_COLOR_CACHE
76 if ((out = g_hash_table_lookup(RrColorHash(inst), &key))) {
80 xcol.red = (r << 8) | r;
81 xcol.green = (g << 8) | g;
82 xcol.blue = (b << 8) | b;
83 if (XAllocColor(RrDisplay(inst), RrColormap(inst), &xcol)) {
84 out = g_new(RrColor, 1);
86 out->r = xcol.red >> 8;
87 out->g = xcol.green >> 8;
88 out->b = xcol.blue >> 8;
90 out->pixel = xcol.pixel;
96 #ifndef NO_COLOR_CACHE
97 g_hash_table_insert(RrColorHash(inst), &out->key, out);
104 void RrColorFree(RrColor *c)
107 if (--c->refcount < 1) {
108 #ifndef NO_COLOR_CACHE
109 g_assert(g_hash_table_lookup(RrColorHash(c->inst), &c->key));
110 g_hash_table_remove(RrColorHash(c->inst), &c->key);
112 if (c->pixel) XFreeColors(RrDisplay(c->inst), RrColormap(c->inst),
114 if (c->gc) XFreeGC(RrDisplay(c->inst), c->gc);
120 void RrReduceDepth(const RrInstance *inst, RrPixel32 *data, XImage *im)
124 RrPixel32 *p32 = (RrPixel32 *) im->data;
125 RrPixel16 *p16 = (RrPixel16 *) im->data;
126 guchar *p8 = (guchar *)im->data;
127 switch (im->bits_per_pixel) {
129 if ((RrRedOffset(inst) != RrDefaultRedOffset) ||
130 (RrBlueOffset(inst) != RrDefaultBlueOffset) ||
131 (RrGreenOffset(inst) != RrDefaultGreenOffset)) {
132 for (y = 0; y < im->height; y++) {
133 for (x = 0; x < im->width; x++) {
134 r = (data[x] >> RrDefaultRedOffset) & 0xFF;
135 g = (data[x] >> RrDefaultGreenOffset) & 0xFF;
136 b = (data[x] >> RrDefaultBlueOffset) & 0xFF;
137 p32[x] = (r << RrRedOffset(inst))
138 + (g << RrGreenOffset(inst))
139 + (b << RrBlueOffset(inst));
144 } else im->data = (gchar*) data;
147 for (y = 0; y < im->height; y++) {
148 for (x = 0; x < im->width; x++) {
149 r = (data[x] >> RrDefaultRedOffset) & 0xFF;
150 r = r >> RrRedShift(inst);
151 g = (data[x] >> RrDefaultGreenOffset) & 0xFF;
152 g = g >> RrGreenShift(inst);
153 b = (data[x] >> RrDefaultBlueOffset) & 0xFF;
154 b = b >> RrBlueShift(inst);
155 p16[x] = (r << RrRedOffset(inst))
156 + (g << RrGreenOffset(inst))
157 + (b << RrBlueOffset(inst));
160 p16 += im->bytes_per_line/2;
164 g_assert(RrVisual(inst)->class != TrueColor);
165 for (y = 0; y < im->height; y++) {
166 for (x = 0; x < im->width; x++) {
167 p8[x] = RrPickColor(inst,
168 data[x] >> RrDefaultRedOffset,
169 data[x] >> RrDefaultGreenOffset,
170 data[x] >> RrDefaultBlueOffset)->pixel;
173 p8 += im->bytes_per_line;
177 g_warning("your bit depth is currently unhandled\n");
181 XColor *RrPickColor(const RrInstance *inst, gint r, gint g, gint b)
183 r = (r & 0xff) >> (8-RrPseudoBPC(inst));
184 g = (g & 0xff) >> (8-RrPseudoBPC(inst));
185 b = (b & 0xff) >> (8-RrPseudoBPC(inst));
186 return &RrPseudoColors(inst)[(r << (2*RrPseudoBPC(inst))) +
187 (g << (1*RrPseudoBPC(inst))) +
191 static void swap_byte_order(XImage *im)
196 for (y = 0; y < im->height; ++y) {
197 for (x = 0; x < im->height; ++x) {
198 gchar *c = &im->data[di + x * im->bits_per_pixel / 8];
201 switch (im->bits_per_pixel) {
214 g_warning("Your bit depth is currently unhandled");
217 di += im->bytes_per_line;
220 if (im->byte_order == LSBFirst)
221 im->byte_order = MSBFirst;
223 im->byte_order = LSBFirst;
226 void RrIncreaseDepth(const RrInstance *inst, RrPixel32 *data, XImage *im)
230 RrPixel32 *p32 = (RrPixel32 *) im->data;
231 RrPixel16 *p16 = (RrPixel16 *) im->data;
232 guchar *p8 = (guchar *)im->data;
234 if (im->byte_order != LSBFirst)
237 switch (im->bits_per_pixel) {
239 for (y = 0; y < im->height; y++) {
240 for (x = 0; x < im->width; x++) {
241 r = (p32[x] >> RrRedOffset(inst)) & 0xff;
242 g = (p32[x] >> RrGreenOffset(inst)) & 0xff;
243 b = (p32[x] >> RrBlueOffset(inst)) & 0xff;
244 data[x] = (r << RrDefaultRedOffset)
245 + (g << RrDefaultGreenOffset)
246 + (b << RrDefaultBlueOffset)
247 + (0xff << RrDefaultAlphaOffset);
250 p32 += im->bytes_per_line/4;
254 for (y = 0; y < im->height; y++) {
255 for (x = 0; x < im->width; x++) {
256 r = (p16[x] & RrRedMask(inst)) >>
259 g = (p16[x] & RrGreenMask(inst)) >>
260 RrGreenOffset(inst) <<
262 b = (p16[x] & RrBlueMask(inst)) >>
263 RrBlueOffset(inst) <<
265 data[x] = (r << RrDefaultRedOffset)
266 + (g << RrDefaultGreenOffset)
267 + (b << RrDefaultBlueOffset)
268 + (0xff << RrDefaultAlphaOffset);
271 p16 += im->bytes_per_line/2;
275 g_warning("this image bit depth is currently unhandled");
278 for (y = 0; y < im->height; y++) {
279 for (x = 0; x < im->width; x++) {
280 if (!(((p8[x / 8]) >> (x % 8)) & 0x1))
281 data[x] = 0xff << RrDefaultAlphaOffset; /* black */
283 data[x] = 0xffffffff; /* white */
286 p8 += im->bytes_per_line;
290 g_warning("this image bit depth is currently unhandled");
294 gint RrColorRed(const RrColor *c)
299 gint RrColorGreen(const RrColor *c)
304 gint RrColorBlue(const RrColor *c)
309 gulong RrColorPixel(const RrColor *c)
314 GC RrColorGC(RrColor *c)
317 RrColorAllocateGC(c);