224 lines
6.5 KiB
C
224 lines
6.5 KiB
C
|
/* LIBPIKA - The PIKA Library
|
||
|
|
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
|
||
|
|
*
|
||
|
|
* 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 3 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
|
||
|
|
* Library 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
|
||
|
|
* <https://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "config.h"
|
||
|
|
|
||
|
|
#include <glib-object.h>
|
||
|
|
|
||
|
|
#include "libpikamath/pikamath.h"
|
||
|
|
|
||
|
|
#include "pikacolortypes.h"
|
||
|
|
|
||
|
|
#include "pikacmyk.h"
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* SECTION: pikacmyk
|
||
|
|
* @title: PikaCMYK
|
||
|
|
* @short_description: Definitions and Functions relating to CMYK colors.
|
||
|
|
*
|
||
|
|
* Definitions and Functions relating to CMYK colors.
|
||
|
|
**/
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* PIKA_TYPE_CMYK
|
||
|
|
*/
|
||
|
|
|
||
|
|
static PikaCMYK * pika_cmyk_copy (const PikaCMYK *cmyk);
|
||
|
|
|
||
|
|
|
||
|
|
G_DEFINE_BOXED_TYPE (PikaCMYK, pika_cmyk, pika_cmyk_copy, g_free)
|
||
|
|
|
||
|
|
static PikaCMYK *
|
||
|
|
pika_cmyk_copy (const PikaCMYK *cmyk)
|
||
|
|
{
|
||
|
|
return g_memdup2 (cmyk, sizeof (PikaCMYK));
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/* CMYK functions */
|
||
|
|
|
||
|
|
/**
|
||
|
|
* pika_cmyk_set:
|
||
|
|
* @cmyk: A #PikaCMYK structure which will hold the specified CMYK value.
|
||
|
|
* @cyan: The Cyan channel of the CMYK value
|
||
|
|
* @magenta: The Magenta channel
|
||
|
|
* @yellow: The Yellow channel
|
||
|
|
* @black: The blacK channel
|
||
|
|
*
|
||
|
|
* Very basic initialiser for the internal #PikaCMYK structure. Channel
|
||
|
|
* values are doubles in the range 0 to 1.
|
||
|
|
**/
|
||
|
|
void
|
||
|
|
pika_cmyk_set (PikaCMYK *cmyk,
|
||
|
|
gdouble cyan,
|
||
|
|
gdouble magenta,
|
||
|
|
gdouble yellow,
|
||
|
|
gdouble black)
|
||
|
|
{
|
||
|
|
g_return_if_fail (cmyk != NULL);
|
||
|
|
|
||
|
|
cmyk->c = cyan;
|
||
|
|
cmyk->m = magenta;
|
||
|
|
cmyk->y = yellow;
|
||
|
|
cmyk->k = black;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* pika_cmyk_set_uchar:
|
||
|
|
* @cmyk: A #PikaCMYK structure which will hold the specified CMYK value.
|
||
|
|
* @cyan: The Cyan channel of the CMYK value
|
||
|
|
* @magenta: The Magenta channel
|
||
|
|
* @yellow: The Yellow channel
|
||
|
|
* @black: The blacK channel
|
||
|
|
*
|
||
|
|
* The same as pika_cmyk_set(), except that channel values are
|
||
|
|
* unsigned chars in the range 0 to 255.
|
||
|
|
**/
|
||
|
|
void
|
||
|
|
pika_cmyk_set_uchar (PikaCMYK *cmyk,
|
||
|
|
guchar cyan,
|
||
|
|
guchar magenta,
|
||
|
|
guchar yellow,
|
||
|
|
guchar black)
|
||
|
|
{
|
||
|
|
g_return_if_fail (cmyk != NULL);
|
||
|
|
|
||
|
|
cmyk->c = (gdouble) cyan / 255.0;
|
||
|
|
cmyk->m = (gdouble) magenta / 255.0;
|
||
|
|
cmyk->y = (gdouble) yellow / 255.0;
|
||
|
|
cmyk->k = (gdouble) black / 255.0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* pika_cmyk_get_uchar:
|
||
|
|
* @cmyk: A #PikaCMYK structure which will hold the specified CMYK value.
|
||
|
|
* @cyan: (out) (optional): The Cyan channel of the CMYK value
|
||
|
|
* @magenta: (out) (optional): The Magenta channel
|
||
|
|
* @yellow: (out) (optional): The Yellow channel
|
||
|
|
* @black: (out) (optional): The blacK channel
|
||
|
|
*
|
||
|
|
* Retrieve individual channel values from a #PikaCMYK structure. Channel
|
||
|
|
* values are pointers to unsigned chars in the range 0 to 255.
|
||
|
|
**/
|
||
|
|
void
|
||
|
|
pika_cmyk_get_uchar (const PikaCMYK *cmyk,
|
||
|
|
guchar *cyan,
|
||
|
|
guchar *magenta,
|
||
|
|
guchar *yellow,
|
||
|
|
guchar *black)
|
||
|
|
{
|
||
|
|
g_return_if_fail (cmyk != NULL);
|
||
|
|
|
||
|
|
if (cyan) *cyan = ROUND (CLAMP (cmyk->c, 0.0, 1.0) * 255.0);
|
||
|
|
if (magenta) *magenta = ROUND (CLAMP (cmyk->m, 0.0, 1.0) * 255.0);
|
||
|
|
if (yellow) *yellow = ROUND (CLAMP (cmyk->y, 0.0, 1.0) * 255.0);
|
||
|
|
if (black) *black = ROUND (CLAMP (cmyk->k, 0.0, 1.0) * 255.0);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/* CMYKA functions */
|
||
|
|
|
||
|
|
/**
|
||
|
|
* pika_cmyka_set:
|
||
|
|
* @cmyka: A #PikaCMYK structure which will hold the specified CMYKA value.
|
||
|
|
* @cyan: The Cyan channel of the CMYK value
|
||
|
|
* @magenta: The Magenta channel
|
||
|
|
* @yellow: The Yellow channel
|
||
|
|
* @black: The blacK channel
|
||
|
|
* @alpha: The Alpha channel
|
||
|
|
*
|
||
|
|
* Initialiser for the internal #PikaCMYK structure. Channel values are
|
||
|
|
* doubles in the range 0 to 1.
|
||
|
|
**/
|
||
|
|
void
|
||
|
|
pika_cmyka_set (PikaCMYK *cmyka,
|
||
|
|
gdouble cyan,
|
||
|
|
gdouble magenta,
|
||
|
|
gdouble yellow,
|
||
|
|
gdouble black,
|
||
|
|
gdouble alpha)
|
||
|
|
{
|
||
|
|
g_return_if_fail (cmyka != NULL);
|
||
|
|
|
||
|
|
cmyka->c = cyan;
|
||
|
|
cmyka->m = magenta;
|
||
|
|
cmyka->y = yellow;
|
||
|
|
cmyka->k = black;
|
||
|
|
cmyka->a = alpha;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* pika_cmyka_set_uchar:
|
||
|
|
* @cmyka: A #PikaCMYK structure which will hold the specified CMYKA value.
|
||
|
|
* @cyan: The Cyan channel of the CMYK value
|
||
|
|
* @magenta: The Magenta channel
|
||
|
|
* @yellow: The Yellow channel
|
||
|
|
* @black: The blacK channel
|
||
|
|
* @alpha: The Alpha channel
|
||
|
|
*
|
||
|
|
* The same as pika_cmyka_set(), except that channel values are
|
||
|
|
* unsigned chars in the range 0 to 255.
|
||
|
|
**/
|
||
|
|
void
|
||
|
|
pika_cmyka_set_uchar (PikaCMYK *cmyka,
|
||
|
|
guchar cyan,
|
||
|
|
guchar magenta,
|
||
|
|
guchar yellow,
|
||
|
|
guchar black,
|
||
|
|
guchar alpha)
|
||
|
|
{
|
||
|
|
g_return_if_fail (cmyka != NULL);
|
||
|
|
|
||
|
|
cmyka->c = (gdouble) cyan / 255.0;
|
||
|
|
cmyka->m = (gdouble) magenta / 255.0;
|
||
|
|
cmyka->y = (gdouble) yellow / 255.0;
|
||
|
|
cmyka->k = (gdouble) black / 255.0;
|
||
|
|
cmyka->a = (gdouble) alpha / 255.0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* pika_cmyka_get_uchar:
|
||
|
|
* @cmyka: A #PikaCMYK structure which will hold the specified CMYKA value.
|
||
|
|
* @cyan: (out) (optional): The Cyan channel of the CMYK value
|
||
|
|
* @magenta: (out) (optional): The Magenta channel
|
||
|
|
* @yellow: (out) (optional): The Yellow channel
|
||
|
|
* @black: (out) (optional): The blacK channel
|
||
|
|
* @alpha: (out) (optional): The Alpha channel
|
||
|
|
*
|
||
|
|
* Retrieve individual channel values from a #PikaCMYK structure.
|
||
|
|
* Channel values are pointers to unsigned chars in the range 0 to 255.
|
||
|
|
**/
|
||
|
|
void
|
||
|
|
pika_cmyka_get_uchar (const PikaCMYK *cmyka,
|
||
|
|
guchar *cyan,
|
||
|
|
guchar *magenta,
|
||
|
|
guchar *yellow,
|
||
|
|
guchar *black,
|
||
|
|
guchar *alpha)
|
||
|
|
{
|
||
|
|
g_return_if_fail (cmyka != NULL);
|
||
|
|
|
||
|
|
if (cyan) *cyan = ROUND (CLAMP (cmyka->c, 0.0, 1.0) * 255.0);
|
||
|
|
if (magenta) *magenta = ROUND (CLAMP (cmyka->m, 0.0, 1.0) * 255.0);
|
||
|
|
if (yellow) *yellow = ROUND (CLAMP (cmyka->y, 0.0, 1.0) * 255.0);
|
||
|
|
if (black) *black = ROUND (CLAMP (cmyka->k, 0.0, 1.0) * 255.0);
|
||
|
|
if (alpha) *alpha = ROUND (CLAMP (cmyka->a, 0.0, 1.0) * 255.0);
|
||
|
|
}
|
