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mutter/src/colors.c
rhp 4ae250ae97 ...
2001-06-03 18:33:59 +00:00

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/* Metacity RGB color stuff */
/*
* Copyright (C) 2001 Havoc Pennington
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#include "colors.h"
static void
visual_decompose_mask (gulong mask,
gint *shift,
gint *prec)
{
/* This code is from GTK+, (C) GTK+ Team */
*shift = 0;
*prec = 0;
while (!(mask & 0x1))
{
(*shift)++;
mask >>= 1;
}
while (mask & 0x1)
{
(*prec)++;
mask >>= 1;
}
}
void
meta_screen_init_visual_info (MetaScreen *screen)
{
Visual *xvisual;
int nxvisuals;
XVisualInfo *visual_list;
XVisualInfo visual_template;
/* root window visual */
xvisual = DefaultVisual (screen->display->xdisplay,
screen->number);
visual_template.visualid = XVisualIDFromVisual (xvisual);
visual_list = XGetVisualInfo (screen->display->xdisplay,
VisualIDMask, &visual_template, &nxvisuals);
if (nxvisuals != 1)
meta_warning ("Matched weird number of visuals %d\n", nxvisuals);
screen->visual_info = *visual_list;
meta_verbose ("Using visual class %d\n", screen->visual_info.class);
XFree (visual_list);
}
gulong
meta_screen_get_x_pixel (MetaScreen *screen,
const PangoColor *color)
{
/* This code is derived from GTK+, (C) GTK+ Team */
gulong pixel;
if (screen->visual_info.class == TrueColor ||
screen->visual_info.class == DirectColor)
{
int red_prec, red_shift, green_prec, green_shift, blue_prec, blue_shift;
visual_decompose_mask (screen->visual_info.red_mask,
&red_shift, &red_prec);
visual_decompose_mask (screen->visual_info.green_mask,
&green_shift, &green_prec);
visual_decompose_mask (screen->visual_info.blue_mask,
&blue_shift, &blue_prec);
pixel = (((color->red >> (16 - red_prec)) << red_shift) +
((color->green >> (16 - green_prec)) << green_shift) +
((color->blue >> (16 - blue_prec)) << blue_shift));
}
else
{
#define INTENSITY(r, g, b) ((r) * 0.30 + (g) * 0.59 + (b) * 0.11)
double r, g, b;
r = color->red / (double) 0xffff;
g = color->green / (double) 0xffff;
b = color->blue / (double) 0xffff;
/* Now this is a low-bloat GdkRGB replacement! */
if (INTENSITY (r, g, b) > 0.5)
pixel = WhitePixel (screen->display->xdisplay, screen->number);
else
pixel = BlackPixel (screen->display->xdisplay, screen->number);
#undef INTENSITY
}
return pixel;
}
void
meta_screen_set_ui_colors (MetaScreen *screen,
const MetaUIColors *colors)
{
screen->colors = *colors;
meta_screen_queue_frame_redraws (screen);
}
/* Straight out of gtkstyle.c */
static PangoColor meta_default_normal_fg = { 0, 0, 0 };
static PangoColor meta_default_active_fg = { 0, 0, 0 };
static PangoColor meta_default_prelight_fg = { 0, 0, 0 };
static PangoColor meta_default_selected_fg = { 0xffff, 0xffff, 0xffff };
static PangoColor meta_default_insensitive_fg = { 0x7530, 0x7530, 0x7530 };
static PangoColor meta_default_normal_bg = { 0xd6d6, 0xd6d6, 0xd6d6 };
static PangoColor meta_default_active_bg = { 0xc350, 0xc350, 0xc350 };
static PangoColor meta_default_prelight_bg = { 0xea60, 0xea60, 0xea60 };
static PangoColor meta_default_selected_bg = { 0, 0, 0x9c40 };
static PangoColor meta_default_insensitive_bg = { 0xd6d6, 0xd6d6, 0xd6d6 };
static void
rgb_to_hls (gdouble *r,
gdouble *g,
gdouble *b)
{
gdouble min;
gdouble max;
gdouble red;
gdouble green;
gdouble blue;
gdouble h, l, s;
gdouble delta;
red = *r;
green = *g;
blue = *b;
if (red > green)
{
if (red > blue)
max = red;
else
max = blue;
if (green < blue)
min = green;
else
min = blue;
}
else
{
if (green > blue)
max = green;
else
max = blue;
if (red < blue)
min = red;
else
min = blue;
}
l = (max + min) / 2;
s = 0;
h = 0;
if (max != min)
{
if (l <= 0.5)
s = (max - min) / (max + min);
else
s = (max - min) / (2 - max - min);
delta = max -min;
if (red == max)
h = (green - blue) / delta;
else if (green == max)
h = 2 + (blue - red) / delta;
else if (blue == max)
h = 4 + (red - green) / delta;
h *= 60;
if (h < 0.0)
h += 360;
}
*r = h;
*g = l;
*b = s;
}
static void
hls_to_rgb (gdouble *h,
gdouble *l,
gdouble *s)
{
gdouble hue;
gdouble lightness;
gdouble saturation;
gdouble m1, m2;
gdouble r, g, b;
lightness = *l;
saturation = *s;
if (lightness <= 0.5)
m2 = lightness * (1 + saturation);
else
m2 = lightness + saturation - lightness * saturation;
m1 = 2 * lightness - m2;
if (saturation == 0)
{
*h = lightness;
*l = lightness;
*s = lightness;
}
else
{
hue = *h + 120;
while (hue > 360)
hue -= 360;
while (hue < 0)
hue += 360;
if (hue < 60)
r = m1 + (m2 - m1) * hue / 60;
else if (hue < 180)
r = m2;
else if (hue < 240)
r = m1 + (m2 - m1) * (240 - hue) / 60;
else
r = m1;
hue = *h;
while (hue > 360)
hue -= 360;
while (hue < 0)
hue += 360;
if (hue < 60)
g = m1 + (m2 - m1) * hue / 60;
else if (hue < 180)
g = m2;
else if (hue < 240)
g = m1 + (m2 - m1) * (240 - hue) / 60;
else
g = m1;
hue = *h - 120;
while (hue > 360)
hue -= 360;
while (hue < 0)
hue += 360;
if (hue < 60)
b = m1 + (m2 - m1) * hue / 60;
else if (hue < 180)
b = m2;
else if (hue < 240)
b = m1 + (m2 - m1) * (240 - hue) / 60;
else
b = m1;
*h = r;
*l = g;
*s = b;
}
}
static void
style_shade (PangoColor *a,
PangoColor *b,
gdouble k)
{
gdouble red;
gdouble green;
gdouble blue;
red = (gdouble) a->red / 65535.0;
green = (gdouble) a->green / 65535.0;
blue = (gdouble) a->blue / 65535.0;
rgb_to_hls (&red, &green, &blue);
green *= k;
if (green > 1.0)
green = 1.0;
else if (green < 0.0)
green = 0.0;
blue *= k;
if (blue > 1.0)
blue = 1.0;
else if (blue < 0.0)
blue = 0.0;
hls_to_rgb (&red, &green, &blue);
b->red = red * 65535.0;
b->green = green * 65535.0;
b->blue = blue * 65535.0;
}
#define LIGHTNESS_MULT 1.3
#define DARKNESS_MULT 0.7
void
meta_screen_init_ui_colors (MetaScreen *screen)
{
int i;
MetaUIColors *colors;
colors = &screen->colors;
colors->fg[META_STATE_NORMAL] = meta_default_normal_fg;
colors->fg[META_STATE_ACTIVE] = meta_default_active_fg;
colors->fg[META_STATE_PRELIGHT] = meta_default_prelight_fg;
colors->fg[META_STATE_SELECTED] = meta_default_selected_fg;
colors->fg[META_STATE_INSENSITIVE] = meta_default_insensitive_fg;
colors->bg[META_STATE_NORMAL] = meta_default_normal_bg;
colors->bg[META_STATE_ACTIVE] = meta_default_active_bg;
colors->bg[META_STATE_PRELIGHT] = meta_default_prelight_bg;
colors->bg[META_STATE_SELECTED] = meta_default_selected_bg;
colors->bg[META_STATE_INSENSITIVE] = meta_default_insensitive_bg;
for (i = 0; i < 4; i++)
{
colors->text[i] = colors->fg[i];
colors->base[i].red = G_MAXUSHORT;
colors->base[i].green = G_MAXUSHORT;
colors->base[i].blue = G_MAXUSHORT;
}
colors->base[META_STATE_SELECTED] = meta_default_selected_bg;
colors->base[META_STATE_INSENSITIVE] = meta_default_prelight_bg;
colors->text[META_STATE_INSENSITIVE] = meta_default_insensitive_fg;
for (i = 0; i < 5; i++)
{
style_shade (&colors->bg[i], &colors->light[i], LIGHTNESS_MULT);
style_shade (&colors->bg[i], &colors->dark[i], DARKNESS_MULT);
colors->mid[i].red = (colors->light[i].red + colors->dark[i].red) / 2;
colors->mid[i].green = (colors->light[i].green + colors->dark[i].green) / 2;
colors->mid[i].blue = (colors->light[i].blue + colors->dark[i].blue) / 2;
colors->text_aa[i].red = (colors->text[i].red + colors->base[i].red) / 2;
colors->text_aa[i].green = (colors->text[i].green + colors->base[i].green) / 2;
colors->text_aa[i].blue = (colors->text[i].blue + colors->base[i].blue) / 2;
}
}
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