diff options
Diffstat (limited to 'widgets')
| -rw-r--r-- | widgets/misc/e-hsv-utils.c | 135 | ||||
| -rw-r--r-- | widgets/misc/e-hsv-utils.h | 20 |
2 files changed, 17 insertions, 138 deletions
diff --git a/widgets/misc/e-hsv-utils.c b/widgets/misc/e-hsv-utils.c index 3a2e4500e0..66bf296199 100644 --- a/widgets/misc/e-hsv-utils.c +++ b/widgets/misc/e-hsv-utils.c @@ -1,6 +1,6 @@ /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ /* - * e-hsv-utils.c - utilites for manipulating colours in HSV space + * e-hsv-utils.c - utilites for manipulating colors in HSV space * Copyright (C) 1995-2001 Seth Nickell, Peter Mattis, Spencer Kimball and Josh MacDonald * * Authors: @@ -26,19 +26,22 @@ #include "e-hsv-utils.h" /* tweak_hsv is a really tweaky function. it modifies its first argument, which - should be the colour you want tweaked. delta_h, delta_s and delta_v specify + should be the color you want tweaked. delta_h, delta_s and delta_v specify how much you want their respective channels modified (and in what direction). if it can't do the specified modification, it does it in the oppositon direction */ void -e_hsv_tweak (GdkColor *colour, gdouble delta_h, gdouble delta_s, gdouble delta_v) +e_hsv_tweak (GdkColor *color, + gdouble delta_h, + gdouble delta_s, + gdouble delta_v) { gdouble h, s, v, r, g, b; - r = colour->red / 65535.0f; - g = colour->green / 65535.0f; - b = colour->blue / 65535.0f; + r = color->red / 65535.0f; + g = color->green / 65535.0f; + b = color->blue / 65535.0f; - e_rgb_to_hsv (r, g, b, &h, &s, &v); + gtk_rgb_to_hsv (r, g, b, &h, &s, &v); if (h + delta_h < 0) { h -= delta_h; @@ -58,120 +61,10 @@ e_hsv_tweak (GdkColor *colour, gdouble delta_h, gdouble delta_s, gdouble delta_v v += delta_v; } - e_hsv_to_rgb (h, s, v, &r, &g, &b); + gtk_hsv_to_rgb (h, s, v, &r, &g, &b); - colour->red = r * 65535.0f; - colour->green = g * 65535.0f; - colour->blue = b * 65535.0f; -} - -/* Copy n' Paste code from the GTK+ colour selector (gtkcolorsel.c) */ -/* Originally lifted, I suspect, from "Foley, van Dam" */ -void -e_hsv_to_rgb (gdouble h, gdouble s, gdouble v, - gdouble *r, gdouble *g, gdouble *b) -{ - gint i; - gdouble f, w, q, t; - - if (s == 0.0) - s = 0.000001; - - if (h == -1.0) - { - *r = v; - *g = v; - *b = v; - } - else - { - if (h == 360.0) - h = 0.0; - h = h / 60.0; - i = (gint) h; - f = h - i; - w = v * (1.0 - s); - q = v * (1.0 - (s * f)); - t = v * (1.0 - (s * (1.0 - f))); - - switch (i) - { - case 0: - *r = v; - *g = t; - *b = w; - break; - case 1: - *r = q; - *g = v; - *b = w; - break; - case 2: - *r = w; - *g = v; - *b = t; - break; - case 3: - *r = w; - *g = q; - *b = v; - break; - case 4: - *r = t; - *g = w; - *b = v; - break; - case 5: - *r = v; - *g = w; - *b = q; - break; - } - } -} - -void -e_rgb_to_hsv (gdouble r, gdouble g, gdouble b, - gdouble *h, gdouble *s, gdouble *v) -{ - double max, min, delta; - - max = r; - if (g > max) - max = g; - if (b > max) - max = b; - - min = r; - if (g < min) - min = g; - if (b < min) - min = b; - - *v = max; - - if (max != 0.0) - *s = (max - min) / max; - else - *s = 0.0; - - if (*s == 0.0) - *h = -1.0; - else - { - delta = max - min; - - if (r == max) - *h = (g - b) / delta; - else if (g == max) - *h = 2.0 + (b - r) / delta; - else if (b == max) - *h = 4.0 + (r - g) / delta; - - *h = *h * 60.0; - - if (*h < 0.0) - *h = *h + 360; - } + color->red = r * 65535.0f; + color->green = g * 65535.0f; + color->blue = b * 65535.0f; } diff --git a/widgets/misc/e-hsv-utils.h b/widgets/misc/e-hsv-utils.h index f76bed73f6..e2f707e56a 100644 --- a/widgets/misc/e-hsv-utils.h +++ b/widgets/misc/e-hsv-utils.h @@ -1,6 +1,6 @@ /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ /* - * e-hsv-utils.h - utilites for manipulating colours in HSV space + * e-hsv-utils.h - utilites for manipulating colors in HSV space * Copyright (C) 1995-2001 Seth Nickell, Peter Mattis, Spencer Kimball and Josh MacDonald * * Authors: @@ -24,25 +24,11 @@ #ifndef _E_HSV_UTILS_H_ #define _E_HSV_UTILS_H_ -#include <gdk/gdk.h> +#include <gtk/gtk.h> G_BEGIN_DECLS -void e_hsv_to_rgb (gdouble h, - gdouble s, - gdouble v, - gdouble *r, - gdouble *g, - gdouble *b); - -void e_rgb_to_hsv (gdouble r, - gdouble g, - gdouble b, - gdouble *h, - gdouble *s, - gdouble *v); - -void e_hsv_tweak (GdkColor *colour, +void e_hsv_tweak (GdkColor *color, gdouble delta_h, gdouble delta_s, gdouble delta_v); |