symboliccolor: Split out HSLA code
This commit is contained in:
Benjamin Otte
parent
cff4718e91
commit
e063a0fdf1
@ -478,6 +478,7 @@ gtk_private_h_sources = \
|
||||
gtkfontchooserprivate.h \
|
||||
gtkfontchooserutils.h \
|
||||
gtkgradientprivate.h \
|
||||
gtkhslaprivate.h \
|
||||
gtkiconcache.h \
|
||||
gtkiconhelperprivate.h \
|
||||
gtkiconviewprivate.h \
|
||||
@ -719,6 +720,7 @@ gtk_base_c_sources = \
|
||||
gtkframe.c \
|
||||
gtkgradient.c \
|
||||
gtkgrid.c \
|
||||
gtkhsla.c \
|
||||
gtkiconcache.c \
|
||||
gtkiconcachevalidator.c \
|
||||
gtkiconfactory.c \
|
||||
|
||||
185
gtk/gtkhsla.c
Normal file
185
gtk/gtkhsla.c
Normal file
@ -0,0 +1,185 @@
|
||||
/* GTK - The GIMP Toolkit
|
||||
* Copyright (C) 2012 Benjamin Otte <otte@gnome.org>
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library 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
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
#include "config.h"
|
||||
|
||||
#include "gtkhslaprivate.h"
|
||||
|
||||
#include <math.h>
|
||||
|
||||
void
|
||||
_gtk_hsla_init (GtkHSLA *hsla,
|
||||
double hue,
|
||||
double saturation,
|
||||
double lightness,
|
||||
double alpha)
|
||||
{
|
||||
g_return_if_fail (hsla != NULL);
|
||||
|
||||
if (hue >= 0)
|
||||
hsla->hue = fmod (hue, 360);
|
||||
else
|
||||
hsla->hue = fmod (hue, 360) + 360;
|
||||
hsla->saturation = CLAMP (saturation, 0, 1);
|
||||
hsla->lightness = CLAMP (lightness, 0, 1);
|
||||
hsla->alpha = CLAMP (alpha, 0, 1);
|
||||
}
|
||||
|
||||
void
|
||||
_gtk_hsla_init_from_rgba (GtkHSLA *hsla,
|
||||
const GdkRGBA *rgba)
|
||||
{
|
||||
gdouble min;
|
||||
gdouble max;
|
||||
gdouble red;
|
||||
gdouble green;
|
||||
gdouble blue;
|
||||
gdouble delta;
|
||||
|
||||
g_return_if_fail (hsla != NULL);
|
||||
g_return_if_fail (rgba != NULL);
|
||||
|
||||
red = rgba->red;
|
||||
green = rgba->green;
|
||||
blue = rgba->blue;
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
hsla->lightness = (max + min) / 2;
|
||||
hsla->saturation = 0;
|
||||
hsla->hue = 0;
|
||||
hsla->alpha = rgba->alpha;
|
||||
|
||||
if (max != min)
|
||||
{
|
||||
if (hsla->lightness <= 0.5)
|
||||
hsla->saturation = (max - min) / (max + min);
|
||||
else
|
||||
hsla->saturation = (max - min) / (2 - max - min);
|
||||
|
||||
delta = max -min;
|
||||
if (red == max)
|
||||
hsla->hue = (green - blue) / delta;
|
||||
else if (green == max)
|
||||
hsla->hue = 2 + (blue - red) / delta;
|
||||
else if (blue == max)
|
||||
hsla->hue = 4 + (red - green) / delta;
|
||||
|
||||
hsla->hue *= 60;
|
||||
if (hsla->hue < 0.0)
|
||||
hsla->hue += 360;
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
_gdk_rgba_init_from_hsla (GdkRGBA *rgba,
|
||||
const GtkHSLA *hsla)
|
||||
{
|
||||
gdouble hue;
|
||||
gdouble lightness;
|
||||
gdouble saturation;
|
||||
gdouble m1, m2;
|
||||
|
||||
lightness = hsla->lightness;
|
||||
saturation = hsla->saturation;
|
||||
|
||||
if (lightness <= 0.5)
|
||||
m2 = lightness * (1 + saturation);
|
||||
else
|
||||
m2 = lightness + saturation - lightness * saturation;
|
||||
m1 = 2 * lightness - m2;
|
||||
|
||||
rgba->alpha = hsla->alpha;
|
||||
|
||||
if (saturation == 0)
|
||||
{
|
||||
rgba->red = lightness;
|
||||
rgba->green = lightness;
|
||||
rgba->blue = lightness;
|
||||
}
|
||||
else
|
||||
{
|
||||
hue = hsla->hue + 120;
|
||||
while (hue > 360)
|
||||
hue -= 360;
|
||||
while (hue < 0)
|
||||
hue += 360;
|
||||
|
||||
if (hue < 60)
|
||||
rgba->red = m1 + (m2 - m1) * hue / 60;
|
||||
else if (hue < 180)
|
||||
rgba->red = m2;
|
||||
else if (hue < 240)
|
||||
rgba->red = m1 + (m2 - m1) * (240 - hue) / 60;
|
||||
else
|
||||
rgba->red = m1;
|
||||
|
||||
hue = hsla->hue;
|
||||
while (hue > 360)
|
||||
hue -= 360;
|
||||
while (hue < 0)
|
||||
hue += 360;
|
||||
|
||||
if (hue < 60)
|
||||
rgba->green = m1 + (m2 - m1) * hue / 60;
|
||||
else if (hue < 180)
|
||||
rgba->green = m2;
|
||||
else if (hue < 240)
|
||||
rgba->green = m1 + (m2 - m1) * (240 - hue) / 60;
|
||||
else
|
||||
rgba->green = m1;
|
||||
|
||||
hue = hsla->hue - 120;
|
||||
while (hue > 360)
|
||||
hue -= 360;
|
||||
while (hue < 0)
|
||||
hue += 360;
|
||||
|
||||
if (hue < 60)
|
||||
rgba->blue = m1 + (m2 - m1) * hue / 60;
|
||||
else if (hue < 180)
|
||||
rgba->blue = m2;
|
||||
else if (hue < 240)
|
||||
rgba->blue = m1 + (m2 - m1) * (240 - hue) / 60;
|
||||
else
|
||||
rgba->blue = m1;
|
||||
}
|
||||
}
|
||||
|
||||
47
gtk/gtkhslaprivate.h
Normal file
47
gtk/gtkhslaprivate.h
Normal file
@ -0,0 +1,47 @@
|
||||
/* GTK - The GIMP Toolkit
|
||||
* Copyright (C) 2012 Benjamin Otte <otte@gnome.org>
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library 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
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
#ifndef __GTK_HSLA_PRIVATE_H__
|
||||
#define __GTK_HSLA_PRIVATE_H__
|
||||
|
||||
#include <gdk/gdk.h>
|
||||
|
||||
G_BEGIN_DECLS
|
||||
|
||||
typedef struct _GtkHSLA GtkHSLA;
|
||||
|
||||
struct _GtkHSLA {
|
||||
double hue;
|
||||
double saturation;
|
||||
double lightness;
|
||||
double alpha;
|
||||
};
|
||||
|
||||
void _gtk_hsla_init (GtkHSLA *hsla,
|
||||
double hue,
|
||||
double saturation,
|
||||
double lightness,
|
||||
double alpha);
|
||||
void _gtk_hsla_init_from_rgba (GtkHSLA *hsla,
|
||||
const GdkRGBA *rgba);
|
||||
/* Yes, I can name that function like this! */
|
||||
void _gdk_rgba_init_from_hsla (GdkRGBA *rgba,
|
||||
const GtkHSLA *hsla);
|
||||
|
||||
G_END_DECLS
|
||||
|
||||
#endif /* __GTK_HSLA_PRIVATE_H__ */
|
||||
@ -18,6 +18,7 @@
|
||||
#include "config.h"
|
||||
#include "gtkcssrgbavalueprivate.h"
|
||||
#include "gtkcssstylepropertyprivate.h"
|
||||
#include "gtkhslaprivate.h"
|
||||
#include "gtkstylepropertyprivate.h"
|
||||
#include "gtksymboliccolorprivate.h"
|
||||
#include "gtkstyleproperties.h"
|
||||
@ -509,179 +510,21 @@ gtk_symbolic_color_unref (GtkSymbolicColor *color)
|
||||
_gtk_css_value_unref ((GtkCssValue *) color);
|
||||
}
|
||||
|
||||
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
|
||||
_shade_color (GdkRGBA *color,
|
||||
gdouble factor)
|
||||
{
|
||||
GdkRGBA temp;
|
||||
GtkHSLA hsla;
|
||||
|
||||
temp = *color;
|
||||
rgb_to_hls (&temp.red, &temp.green, &temp.blue);
|
||||
_gtk_hsla_init_from_rgba (&hsla, color);
|
||||
|
||||
temp.green *= factor;
|
||||
if (temp.green > 1.0)
|
||||
temp.green = 1.0;
|
||||
else if (temp.green < 0.0)
|
||||
temp.green = 0.0;
|
||||
hsla.lightness *= factor;
|
||||
hsla.lightness = CLAMP (hsla.lightness, 0.0, 1.0);
|
||||
|
||||
temp.blue *= factor;
|
||||
if (temp.blue > 1.0)
|
||||
temp.blue = 1.0;
|
||||
else if (temp.blue < 0.0)
|
||||
temp.blue = 0.0;
|
||||
hsla.hue *= factor;
|
||||
hsla.hue = CLAMP (hsla.hue, 0.0, 1.0);
|
||||
|
||||
hls_to_rgb (&temp.red, &temp.green, &temp.blue);
|
||||
*color = temp;
|
||||
_gdk_rgba_init_from_hsla (color, &hsla);
|
||||
}
|
||||
|
||||
/**
|
||||
|
||||
Loading…
Reference in New Issue
Block a user