/*
* Copyright (c) 2024 Jiri Svoboda
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup libgfx
* @{
*/
/**
* @file Color operations
*/
#include <gfx/color.h>
#include <stdint.h>
#include <stdlib.h>
#include "../private/color.h"
/** Create new 16-bit per channel RGB color.
*
* Create a new RGB color where the R, G, B components have 16 bits
* of precision each.
*
* @param r Red component
* @param g Green component
* @param b Blue component
* @param rcolor Place to store pointer to new color
*
* @return EOK on success or an error code, ENOMEM if out of resources,
* EIO if the graphic device connection was lost
*/
errno_t gfx_color_new_rgb_i16(uint16_t r, uint16_t g, uint16_t b,
gfx_color_t **rcolor)
{
gfx_color_t *color;
color = calloc(1, sizeof(gfx_color_t));
if (color == NULL)
return ENOMEM;
color->r = r;
color->g = g;
color->b = b;
color->attr = 0xff;
*rcolor = color;
return EOK;
}
/** Create new EGA color.
*
* @param attr EGA attributes
* @param rcolor Place to store pointer to new color
*
* @return EOK on success or an error code, ENOMEM if out of resources,
* EIO if the graphic device connection was lost
*/
errno_t gfx_color_new_ega(uint8_t attr, gfx_color_t **rcolor)
{
gfx_color_t *color;
color = calloc(1, sizeof(gfx_color_t));
if (color == NULL)
return ENOMEM;
color->attr = attr;
*rcolor = color;
return EOK;
}
/** Delete color.
*
* @param color Color
*/
void gfx_color_delete(gfx_color_t *color)
{
free(color);
}
/** Convert color to 16-bit RGB coordinates.
*
* @param color Color
* @param r Place to store red coordinate
* @param g Place to store green coordinate
* @param b Place to store blue coordinate
*/
void gfx_color_get_rgb_i16(gfx_color_t *color, uint16_t *r, uint16_t *g,
uint16_t *b)
{
*r = color->r;
*g = color->g;
*b = color->b;
}
/** Convert color to EGA attributes.
*
* @param color Color
* @param attr Place to store EGA attributes
*/
void gfx_color_get_ega(gfx_color_t *color, uint8_t *attr)
{
*attr = color->attr;
}
/** @}
*/