comparison: pidgin/pidginstyle.c
pidgin/pidginstyle.c
- changeset 40592
- 559881c7bf92
- parent 39277
- 68c17ba18f33
equal
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inserted
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| 40591:ac53ccf25e25 | 40592:559881c7bf92 |
|---|---|
| 1 /* | |
| 2 * Pidgin - Internet Messenger | |
| 3 * Copyright (C) Pidgin Developers <devel@pidgin.im> | |
| 4 * | |
| 5 * Pidgin is the legal property of its developers, whose names are too numerous | |
| 6 * to list here. Please refer to the COPYRIGHT file distributed with this | |
| 7 * source distribution. | |
| 8 * | |
| 9 * This program is free software; you can redistribute it and/or modify | |
| 10 * under the terms of the GNU General Public License as published by | |
| 11 * the Free Software Foundation; either version 2 of the License, or | |
| 12 * (at your option) any later version. | |
| 13 * | |
| 14 * This program is distributed in the hope that it will be useful, | |
| 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 17 * GNU General Public License for more details. | |
| 18 * | |
| 19 * You should have received a copy of the GNU General Public License | |
| 20 * along with this library; if not, see <https://www.gnu.org/licenses/>. | |
| 21 */ | |
| 22 | |
| 23 #include "pidgin/pidginstyle.h" | |
| 24 | |
| 25 /* Assume light mode */ | |
| 26 static gboolean dark_mode_have_cache = FALSE; | |
| 27 static gboolean dark_mode_cached_value = FALSE; | |
| 28 | |
| 29 gboolean | |
| 30 pidgin_style_is_dark(GtkStyle *style) { | |
| 31 G_GNUC_BEGIN_IGNORE_DEPRECATIONS | |
| 32 | |
| 33 GdkColor bg; | |
| 34 gdouble luminance = 0.0; | |
| 35 | |
| 36 if(style == NULL) { | |
| 37 if(dark_mode_have_cache) { | |
| 38 return dark_mode_cached_value; | |
| 39 } | |
| 40 | |
| 41 style = gtk_widget_get_default_style(); | |
| 42 } | |
| 43 | |
| 44 bg = style->base[GTK_STATE_NORMAL]; | |
| 45 | |
| 46 /* magic values are taken from https://en.wikipedia.org/wiki/Luma_(video) | |
| 47 * Rec._601_luma_versus_Rec._709_luma_coefficients. | |
| 48 */ | |
| 49 luminance = (0.299 * bg.red) + (0.587 * bg.green) + (0.114 * bg.blue); | |
| 50 | |
| 51 G_GNUC_END_IGNORE_DEPRECATIONS | |
| 52 | |
| 53 dark_mode_cached_value = (luminance < 0x7FFF); | |
| 54 dark_mode_have_cache = TRUE; | |
| 55 | |
| 56 return dark_mode_cached_value; | |
| 57 } | |
| 58 | |
| 59 void | |
| 60 pidgin_style_adjust_contrast(GtkStyle *style, GdkRGBA *rgba) { | |
| 61 if (pidgin_style_is_dark(style)) { | |
| 62 gdouble h, s, v; | |
| 63 | |
| 64 gtk_rgb_to_hsv(rgba->red, rgba->green, rgba->blue, &h, &s, &v); | |
| 65 | |
| 66 v += 0.3; | |
| 67 v = v > 1.0 ? 1.0 : v; | |
| 68 s = 0.7; | |
| 69 | |
| 70 gtk_hsv_to_rgb(h, s, v, &rgba->red, &rgba->green, &rgba->blue); | |
| 71 } | |
| 72 } |
