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1// Color.cc for Fluxbox window manager
2// Copyright (c) 2002 Henrik Kinnunen (fluxgen@users.sourceforge.net)
3//
4// Permission is hereby granted, free of charge, to any person obtaining a
5// copy of this software and associated documentation files (the "Software"),
6// to deal in the Software without restriction, including without limitation
7// the rights to use, copy, modify, merge, publish, distribute, sublicense,
8// and/or sell copies of the Software, and to permit persons to whom the
9// Software is furnished to do so, subject to the following conditions:
10//
11// The above copyright notice and this permission notice shall be included in
12// all copies or substantial portions of the Software.
13//
14// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20// DEALINGS IN THE SOFTWARE.
21
22// $Id: Color.cc,v 1.1 2002/09/14 12:47:50 fluxgen Exp $
23
24#include "Color.hh"
25
26namespace {
27unsigned char maxValue(unsigned short colval) {
28 if (colval == 65535)
29 return 0xFF;
30
31 return static_cast<unsigned char>(colval/0xFF);
32}
33
34};
35
36namespace FbTk {
37Color::Color():
38m_allocated(false) {
39
40}
41
42Color::Color(unsigned char red, unsigned char green, unsigned char blue, int screen):
43m_red(red), m_green(green), m_blue(blue),
44m_pixel(0), m_allocated(false) {
45
46 Display *disp = BaseDisplay::getXDisplay();
47 XColor color;
48 // fill xcolor structure
49 color.red = red;
50 color.blue = blue;
51 color.green = green;
52
53 if (!XAllocColor(disp, DefaultColormap(disp, screen), &color)) {
54 cerr<<"FbTk::Color: Allocation error."<<endl;
55 } else {
56 setRGB(maxValue(color.red),
57 maxValue(color.green),
58 maxValue(color.blue));
59 setPixel(color.pixel);
60 setAllocated(true);
61 }
62}
63
64Color::Color(const char *color_string, int screen):
65m_allocated(false) {
66 setFromString(color_string, screen);
67}
68
69bool Color::setFromString(const char *color_string, int screen) {
70
71 if (color_string == 0) {
72 free();
73 return false;
74 }
75
76 Display *disp = BaseDisplay::instance()->getXDisplay();
77 Colormap colm = DefaultColormap(disp, screen);
78
79 XColor color;
80
81 if (! XParseColor(disp, colm, color_string, &color))
82 cerr<<"FbTk::Color: Parse color error: \""<<color_string<<"\""<<endl;
83 else if (! XAllocColor(disp, colm, &color))
84 cerr<<"FbTk::Color: Allocation error: \""<<color_string<<"\""<<endl;
85
86
87
88 setPixel(color.pixel);
89 setRGB(maxValue(color.red),
90 maxValue(color.green),
91 maxValue(color.blue));
92 setAllocated(true);
93
94 return true;
95}
96
97void Color::free() {
98 if (isAllocated()) {
99 unsigned long pixel = col.pixel();
100 XFreeColors(disp, colm, &pixel, 1, 0);
101 setPixel(0);
102 setRGB(0, 0, 0);
103 setAllocated(false);
104 }
105}
106
107};