1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
|
/*
Copyright (c) 2011 by Simon Schneegans
This program is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the Free
Software Foundation, either version 3 of the License, or (at your option)
any later version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
You should have received a copy of the GNU General Public License along with
this program. If not, see <http://www.gnu.org/licenses/>.
*/
using GLib.Math;
namespace GnomePie {
/////////////////////////////////////////////////////////////////////////
/// A Color class with full rgb/hsv support
/// and some useful utility methods.
/////////////////////////////////////////////////////////////////////////
public class Color: GLib.Object {
/////////////////////////////////////////////////////////////////////
/// Private members, storing the actual color information.
/// In range 0 .. 1
/////////////////////////////////////////////////////////////////////
private float _r;
private float _g;
private float _b;
private float _a;
/////////////////////////////////////////////////////////////////////
/// Creates a white Color.
/////////////////////////////////////////////////////////////////////
public Color() {
Color.from_rgb(1.0f, 1.0f, 1.0f);
}
/////////////////////////////////////////////////////////////////////
/// Creates a solid color with the given RGB values.
/////////////////////////////////////////////////////////////////////
public Color.from_rgb(float red, float green, float blue) {
Color.from_rgba(red, green, blue, 1.0f);
}
/////////////////////////////////////////////////////////////////////
/// Creates a translucient color with the given RGBA values.
/////////////////////////////////////////////////////////////////////
public Color.from_rgba(float red, float green, float blue, float alpha) {
r = red;
g = green;
b = blue;
a = alpha;
}
/////////////////////////////////////////////////////////////////////
/// Creates a color from the given Gdk.Color
/////////////////////////////////////////////////////////////////////
public Color.from_gdk(Gdk.Color color) {
Color.from_rgb(
(float)color.red/65535.0f,
(float)color.green/65535.0f,
(float)color.blue/65535.0f
);
}
/////////////////////////////////////////////////////////////////////
/// Creates a color, parsed from a string, such as #22EE33
/////////////////////////////////////////////////////////////////////
public Color.from_string(string hex_string) {
Gdk.Color color;
Gdk.Color.parse(hex_string, out color);
Color.from_gdk(color);
}
/////////////////////////////////////////////////////////////////////
/// Gets the main color from an Image. Code from Unity.
/////////////////////////////////////////////////////////////////////
public Color.from_icon(Image icon) {
unowned uchar[] data = icon.surface.get_data();
uint width = icon.surface.get_width();
uint height = icon.surface.get_height();
uint row_bytes = icon.surface.get_stride();
double total = 0.0;
double rtotal = 0.0;
double gtotal = 0.0;
double btotal = 0.0;
for (uint i = 0; i < width; ++i) {
for (uint j = 0; j < height; ++j) {
uint pixel = j * row_bytes + i * 4;
double b = data[pixel + 0]/255.0;
double g = data[pixel + 1]/255.0;
double r = data[pixel + 2]/255.0;
double a = data[pixel + 3]/255.0;
double saturation = (fmax (r, fmax (g, b)) - fmin (r, fmin (g, b)));
double relevance = 0.1 + 0.9 * a * saturation;
rtotal += (r * relevance);
gtotal += (g * relevance);
btotal += (b * relevance);
total += relevance;
}
}
Color.from_rgb((float)(rtotal/total), (float)(gtotal/total), (float)(btotal/total));
if (s > 0.15f) s = 0.65f;
v = 1.0f;
}
/////////////////////////////////////////////////////////////////////
/// The reddish part of the color.
/////////////////////////////////////////////////////////////////////
public float r {
get {
return _r;
}
set {
if (value > 1.0f) _r = 1.0f;
else if (value < 0.0f) _r = 0.0f;
else _r = value;
}
}
/////////////////////////////////////////////////////////////////////
/// The greenish part of the color.
/////////////////////////////////////////////////////////////////////
public float g {
get {
return _g;
}
set {
if (value > 1.0f) _g = 1.0f;
else if (value < 0.0f) _g = 0.0f;
else _g = value;
}
}
/////////////////////////////////////////////////////////////////////
/// The blueish part of the color.
/////////////////////////////////////////////////////////////////////
public float b {
get {
return _b;
}
set {
if (value > 1.0f) _b = 1.0f;
else if (value < 0.0f) _b = 0.0f;
else _b = value;
}
}
/////////////////////////////////////////////////////////////////////
/// The transparency of the color.
/////////////////////////////////////////////////////////////////////
public float a {
get {
return _a;
}
set {
if (value > 1.0f) _a = 1.0f;
else if (value < 0.0f) _a = 0.0f;
else _a = value;
}
}
/////////////////////////////////////////////////////////////////////
/// The hue of the color.
/////////////////////////////////////////////////////////////////////
public float h {
get {
if (s > 0.0f) {
float maxi = fmaxf(fmaxf(r, g), b);
float mini = fminf(fminf(r, g), b);
if (maxi == r)
return fmodf(60.0f*((g-b)/(maxi-mini))+360.0f, 360.0f);
else if (maxi == g)
return fmodf(60.0f*(2.0f + (b-r)/(maxi-mini))+360.0f, 360.0f);
else
return fmodf(60.0f*(4.0f + (r-g)/(maxi-mini))+360.0f, 360.0f);
}
else return 0.0f;
}
set {
setHSV(value, s, v);
}
}
/////////////////////////////////////////////////////////////////////
/// The saturation of the color.
/////////////////////////////////////////////////////////////////////
public float s {
get {
if (v == 0.0f) return 0.0f;
else return ((v-fminf(fminf(r, g), b)) / v);
}
set {
if (value > 1.0f) setHSV(h, 1.0f, v);
else if (value < 0.0f) setHSV(h, 0.0f, v);
else setHSV(h, value, v);
}
}
/////////////////////////////////////////////////////////////////////
/// The value of the color.
/////////////////////////////////////////////////////////////////////
public float v {
get {
return fmaxf(fmaxf(r, g), b);
}
set {
if (value > 1) setHSV(h, s, 1.0f);
else if (value < 0) setHSV(h, s, 0.0f);
else setHSV(h, s, value);
}
}
/////////////////////////////////////////////////////////////////////
/// Inverts the color.
/////////////////////////////////////////////////////////////////////
public void invert() {
h += 180.0f;
v = 1.0f - v;
}
/////////////////////////////////////////////////////////////////////
/// Private member, used to apply color changes.
/////////////////////////////////////////////////////////////////////
private void setHSV(float hue, float saturation, float val) {
if(saturation == 0) {
r = val;
g = val;
b = val;
return;
}
hue = fmodf(hue, 360);
hue /= 60;
int i = (int) floorf(hue);
float f = hue - i;
switch(i) {
case 0:
r = val;
g = val * (1.0f - saturation * (1.0f - f));
b = val * (1.0f - saturation);
break;
case 1:
r = val * (1.0f - saturation * f);
g = val;
b = val * (1.0f - saturation);
break;
case 2:
r = val * (1.0f - saturation);
g = val;
b = val * (1.0f - saturation * (1.0f - f));
break;
case 3:
r = val * (1.0f - saturation);
g = val * (1.0f - saturation * f);
b = val;
break;
case 4:
r = val * (1.0f - saturation * (1.0f - f));
g = val * (1.0f - saturation);
b = val;
break;
default:
r = val;
g = val * (1.0f - saturation);
b = val * (1.0f - saturation * f);
break;
}
}
}
}
|
