369 lines
9.2 KiB
C
369 lines
9.2 KiB
C
/* Metacity RGB color stuff */
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/*
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* Copyright (C) 2001 Havoc Pennington
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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#include "colors.h"
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static void
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visual_decompose_mask (gulong mask,
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gint *shift,
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gint *prec)
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{
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/* This code is from GTK+, (C) GTK+ Team */
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*shift = 0;
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*prec = 0;
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while (!(mask & 0x1))
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{
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(*shift)++;
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mask >>= 1;
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}
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while (mask & 0x1)
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{
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(*prec)++;
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mask >>= 1;
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}
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}
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void
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meta_screen_init_visual_info (MetaScreen *screen)
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{
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Visual *xvisual;
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int nxvisuals;
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XVisualInfo *visual_list;
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XVisualInfo visual_template;
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/* root window visual */
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xvisual = DefaultVisual (screen->display->xdisplay,
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screen->number);
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visual_template.visualid = XVisualIDFromVisual (xvisual);
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visual_list = XGetVisualInfo (screen->display->xdisplay,
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VisualIDMask, &visual_template, &nxvisuals);
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if (nxvisuals != 1)
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meta_warning ("Matched weird number of visuals %d\n", nxvisuals);
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screen->visual_info = *visual_list;
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meta_verbose ("Using visual class %d\n", screen->visual_info.class);
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XFree (visual_list);
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}
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gulong
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meta_screen_get_x_pixel (MetaScreen *screen,
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const PangoColor *color)
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{
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/* This code is derived from GTK+, (C) GTK+ Team */
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gulong pixel;
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if (screen->visual_info.class == TrueColor ||
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screen->visual_info.class == DirectColor)
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{
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int red_prec, red_shift, green_prec, green_shift, blue_prec, blue_shift;
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visual_decompose_mask (screen->visual_info.red_mask,
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&red_shift, &red_prec);
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visual_decompose_mask (screen->visual_info.green_mask,
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&green_shift, &green_prec);
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visual_decompose_mask (screen->visual_info.blue_mask,
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&blue_shift, &blue_prec);
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pixel = (((color->red >> (16 - red_prec)) << red_shift) +
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((color->green >> (16 - green_prec)) << green_shift) +
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((color->blue >> (16 - blue_prec)) << blue_shift));
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}
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else
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{
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#define INTENSITY(r, g, b) ((r) * 0.30 + (g) * 0.59 + (b) * 0.11)
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double r, g, b;
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r = color->red / (double) 0xffff;
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g = color->green / (double) 0xffff;
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b = color->blue / (double) 0xffff;
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/* Now this is a low-bloat GdkRGB replacement! */
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if (INTENSITY (r, g, b) > 0.5)
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pixel = WhitePixel (screen->display->xdisplay, screen->number);
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else
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pixel = BlackPixel (screen->display->xdisplay, screen->number);
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#undef INTENSITY
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}
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return pixel;
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}
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void
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meta_screen_set_ui_colors (MetaScreen *screen,
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const MetaUIColors *colors)
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{
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screen->colors = *colors;
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meta_screen_queue_frame_redraws (screen);
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}
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/* Straight out of gtkstyle.c */
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static PangoColor meta_default_normal_fg = { 0, 0, 0 };
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static PangoColor meta_default_active_fg = { 0, 0, 0 };
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static PangoColor meta_default_prelight_fg = { 0, 0, 0 };
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static PangoColor meta_default_selected_fg = { 0xffff, 0xffff, 0xffff };
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static PangoColor meta_default_insensitive_fg = { 0x7530, 0x7530, 0x7530 };
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static PangoColor meta_default_normal_bg = { 0xd6d6, 0xd6d6, 0xd6d6 };
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static PangoColor meta_default_active_bg = { 0xc350, 0xc350, 0xc350 };
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static PangoColor meta_default_prelight_bg = { 0xea60, 0xea60, 0xea60 };
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static PangoColor meta_default_selected_bg = { 0, 0, 0x9c40 };
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static PangoColor meta_default_insensitive_bg = { 0xd6d6, 0xd6d6, 0xd6d6 };
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static void
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rgb_to_hls (gdouble *r,
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gdouble *g,
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gdouble *b)
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{
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gdouble min;
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gdouble max;
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gdouble red;
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gdouble green;
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gdouble blue;
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gdouble h, l, s;
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gdouble delta;
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red = *r;
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green = *g;
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blue = *b;
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if (red > green)
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{
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if (red > blue)
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max = red;
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else
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max = blue;
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if (green < blue)
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min = green;
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else
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min = blue;
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}
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else
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{
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if (green > blue)
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max = green;
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else
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max = blue;
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if (red < blue)
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min = red;
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else
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min = blue;
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}
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l = (max + min) / 2;
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s = 0;
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h = 0;
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if (max != min)
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{
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if (l <= 0.5)
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s = (max - min) / (max + min);
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else
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s = (max - min) / (2 - max - min);
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delta = max -min;
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if (red == max)
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h = (green - blue) / delta;
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else if (green == max)
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h = 2 + (blue - red) / delta;
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else if (blue == max)
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h = 4 + (red - green) / delta;
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h *= 60;
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if (h < 0.0)
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h += 360;
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}
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*r = h;
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*g = l;
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*b = s;
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}
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static void
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hls_to_rgb (gdouble *h,
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gdouble *l,
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gdouble *s)
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{
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gdouble hue;
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gdouble lightness;
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gdouble saturation;
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gdouble m1, m2;
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gdouble r, g, b;
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lightness = *l;
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saturation = *s;
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if (lightness <= 0.5)
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m2 = lightness * (1 + saturation);
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else
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m2 = lightness + saturation - lightness * saturation;
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m1 = 2 * lightness - m2;
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if (saturation == 0)
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{
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*h = lightness;
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*l = lightness;
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*s = lightness;
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}
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else
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{
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hue = *h + 120;
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while (hue > 360)
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hue -= 360;
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while (hue < 0)
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hue += 360;
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if (hue < 60)
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r = m1 + (m2 - m1) * hue / 60;
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else if (hue < 180)
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r = m2;
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else if (hue < 240)
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r = m1 + (m2 - m1) * (240 - hue) / 60;
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else
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r = m1;
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hue = *h;
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while (hue > 360)
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hue -= 360;
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while (hue < 0)
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hue += 360;
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if (hue < 60)
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g = m1 + (m2 - m1) * hue / 60;
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else if (hue < 180)
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g = m2;
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else if (hue < 240)
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g = m1 + (m2 - m1) * (240 - hue) / 60;
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else
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g = m1;
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hue = *h - 120;
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while (hue > 360)
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hue -= 360;
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while (hue < 0)
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hue += 360;
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if (hue < 60)
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b = m1 + (m2 - m1) * hue / 60;
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else if (hue < 180)
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b = m2;
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else if (hue < 240)
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b = m1 + (m2 - m1) * (240 - hue) / 60;
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else
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b = m1;
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*h = r;
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*l = g;
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*s = b;
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}
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}
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static void
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style_shade (PangoColor *a,
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PangoColor *b,
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gdouble k)
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{
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gdouble red;
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gdouble green;
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gdouble blue;
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red = (gdouble) a->red / 65535.0;
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green = (gdouble) a->green / 65535.0;
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blue = (gdouble) a->blue / 65535.0;
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rgb_to_hls (&red, &green, &blue);
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green *= k;
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if (green > 1.0)
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green = 1.0;
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else if (green < 0.0)
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green = 0.0;
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blue *= k;
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if (blue > 1.0)
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blue = 1.0;
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else if (blue < 0.0)
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blue = 0.0;
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hls_to_rgb (&red, &green, &blue);
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b->red = red * 65535.0;
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b->green = green * 65535.0;
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b->blue = blue * 65535.0;
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}
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#define LIGHTNESS_MULT 1.3
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#define DARKNESS_MULT 0.7
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void
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meta_screen_init_ui_colors (MetaScreen *screen)
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{
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int i;
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MetaUIColors *colors;
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colors = &screen->colors;
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colors->fg[META_STATE_NORMAL] = meta_default_normal_fg;
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colors->fg[META_STATE_ACTIVE] = meta_default_active_fg;
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colors->fg[META_STATE_PRELIGHT] = meta_default_prelight_fg;
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colors->fg[META_STATE_SELECTED] = meta_default_selected_fg;
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colors->fg[META_STATE_INSENSITIVE] = meta_default_insensitive_fg;
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colors->bg[META_STATE_NORMAL] = meta_default_normal_bg;
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colors->bg[META_STATE_ACTIVE] = meta_default_active_bg;
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colors->bg[META_STATE_PRELIGHT] = meta_default_prelight_bg;
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colors->bg[META_STATE_SELECTED] = meta_default_selected_bg;
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colors->bg[META_STATE_INSENSITIVE] = meta_default_insensitive_bg;
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for (i = 0; i < 4; i++)
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{
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colors->text[i] = colors->fg[i];
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colors->base[i].red = G_MAXUSHORT;
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colors->base[i].green = G_MAXUSHORT;
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colors->base[i].blue = G_MAXUSHORT;
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}
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colors->base[META_STATE_SELECTED] = meta_default_selected_bg;
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colors->base[META_STATE_INSENSITIVE] = meta_default_prelight_bg;
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colors->text[META_STATE_INSENSITIVE] = meta_default_insensitive_fg;
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for (i = 0; i < 5; i++)
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{
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style_shade (&colors->bg[i], &colors->light[i], LIGHTNESS_MULT);
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style_shade (&colors->bg[i], &colors->dark[i], DARKNESS_MULT);
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colors->mid[i].red = (colors->light[i].red + colors->dark[i].red) / 2;
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colors->mid[i].green = (colors->light[i].green + colors->dark[i].green) / 2;
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colors->mid[i].blue = (colors->light[i].blue + colors->dark[i].blue) / 2;
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colors->text_aa[i].red = (colors->text[i].red + colors->base[i].red) / 2;
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colors->text_aa[i].green = (colors->text[i].green + colors->base[i].green) / 2;
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colors->text_aa[i].blue = (colors->text[i].blue + colors->base[i].blue) / 2;
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}
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}
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