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) 2003-2007 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.
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_message("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 RrPixel8 *p8 = (RrPixel8 *) 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 if (RrVisual(inst)->class == TrueColor) {
165 for (y = 0; y < im->height; y++) {
166 for (x = 0; x < im->width; x++) {
167 r = (data[x] >> RrDefaultRedOffset) & 0xFF;
168 r = r >> RrRedShift(inst);
169 g = (data[x] >> RrDefaultGreenOffset) & 0xFF;
170 g = g >> RrGreenShift(inst);
171 b = (data[x] >> RrDefaultBlueOffset) & 0xFF;
172 b = b >> RrBlueShift(inst);
173 p8[x] = (r << RrRedOffset(inst))
174 + (g << RrGreenOffset(inst))
175 + (b << RrBlueOffset(inst));
178 p8 += im->bytes_per_line;
181 for (y = 0; y < im->height; y++) {
182 for (x = 0; x < im->width; x++) {
183 p8[x] = RrPickColor(inst,
184 data[x] >> RrDefaultRedOffset,
185 data[x] >> RrDefaultGreenOffset,
186 data[x] >> RrDefaultBlueOffset)->pixel;
189 p8 += im->bytes_per_line;
194 g_error("Your bit depth is currently unhandled\n");
199 XColor *RrPickColor(const RrInstance *inst, gint r, gint g, gint b)
201 r = (r & 0xff) >> (8-RrPseudoBPC(inst));
202 g = (g & 0xff) >> (8-RrPseudoBPC(inst));
203 b = (b & 0xff) >> (8-RrPseudoBPC(inst));
204 return &RrPseudoColors(inst)[(r << (2*RrPseudoBPC(inst))) +
205 (g << (1*RrPseudoBPC(inst))) +
209 static void swap_byte_order(XImage *im)
214 for (y = 0; y < im->height; ++y) {
215 for (x = 0; x < im->height; ++x) {
216 gchar *c = &im->data[di + x * im->bits_per_pixel / 8];
219 switch (im->bits_per_pixel) {
232 g_error("Your bit depth (%i) is currently unhandled",
236 di += im->bytes_per_line;
239 if (im->byte_order == LSBFirst)
240 im->byte_order = MSBFirst;
242 im->byte_order = LSBFirst;
245 void RrIncreaseDepth(const RrInstance *inst, RrPixel32 *data, XImage *im)
249 RrPixel32 *p32 = (RrPixel32 *) im->data;
250 RrPixel16 *p16 = (RrPixel16 *) im->data;
251 guchar *p8 = (guchar *)im->data;
253 if (im->byte_order != LSBFirst)
256 switch (im->bits_per_pixel) {
258 for (y = 0; y < im->height; y++) {
259 for (x = 0; x < im->width; x++) {
260 r = (p32[x] >> RrRedOffset(inst)) & 0xff;
261 g = (p32[x] >> RrGreenOffset(inst)) & 0xff;
262 b = (p32[x] >> RrBlueOffset(inst)) & 0xff;
263 data[x] = (r << RrDefaultRedOffset)
264 + (g << RrDefaultGreenOffset)
265 + (b << RrDefaultBlueOffset)
266 + (0xff << RrDefaultAlphaOffset);
269 p32 += im->bytes_per_line/4;
273 for (y = 0; y < im->height; y++) {
274 for (x = 0; x < im->width; x++) {
275 r = (p16[x] & RrRedMask(inst)) >>
278 g = (p16[x] & RrGreenMask(inst)) >>
279 RrGreenOffset(inst) <<
281 b = (p16[x] & RrBlueMask(inst)) >>
282 RrBlueOffset(inst) <<
284 data[x] = (r << RrDefaultRedOffset)
285 + (g << RrDefaultGreenOffset)
286 + (b << RrDefaultBlueOffset)
287 + (0xff << RrDefaultAlphaOffset);
290 p16 += im->bytes_per_line/2;
294 g_error("This image bit depth (%i) is currently unhandled", 8);
297 for (y = 0; y < im->height; y++) {
298 for (x = 0; x < im->width; x++) {
299 if (!(((p8[x / 8]) >> (x % 8)) & 0x1))
300 data[x] = 0xff << RrDefaultAlphaOffset; /* black */
302 data[x] = 0xffffffff; /* white */
305 p8 += im->bytes_per_line;
309 g_error("This image bit depth (%i) is currently unhandled",
314 gint RrColorRed(const RrColor *c)
319 gint RrColorGreen(const RrColor *c)
324 gint RrColorBlue(const RrColor *c)
329 gulong RrColorPixel(const RrColor *c)
334 GC RrColorGC(RrColor *c)
337 RrColorAllocateGC(c);