colors.h

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/*
** Jo Sega Saturn Engine
** Copyright (c) 2012-2026, Johannes Fetz (johannesfetz@gmail.com)
** 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.
**     * Neither the name of the Johannes Fetz nor the
**       names of its contributors may be used to endorse or promote products
**       derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 Johannes Fetz 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.
*/
 
#ifndef __JO_COLORS_H__
# define __JO_COLORS_H__
 
/*
** MACROS
*/
 
/*
** for jo_set_printf_color_index
*/
#define JO_COLOR_INDEX_White    (0)
#define JO_COLOR_INDEX_Black    (1)
#define JO_COLOR_INDEX_Red      (2)
#define JO_COLOR_INDEX_Green    (3)
#define JO_COLOR_INDEX_Yellow   (4)
#define JO_COLOR_INDEX_Blue     (5)
#define JO_COLOR_INDEX_Purple   (6)
 
/*
** jo_color constants
*/
# define JO_COLOR_White         (65535)
# define JO_COLOR_Black         (32768)
# define JO_COLOR_Red           (32799)
# define JO_COLOR_Green         (33760)
# define JO_COLOR_Yellow        (33791)
# define JO_COLOR_Blue          (64512)
# define JO_COLOR_Purple        (64543)
# define JO_COLOR_Cyan          (65504)
# define JO_COLOR_Gray          (58136)
# define JO_COLOR_DarkRed       (32776)
# define JO_COLOR_DarkGreen     (33024)
# define JO_COLOR_DarkYellow    (33032)
# define JO_COLOR_DarkBlue      (40960)
# define JO_COLOR_DarkPurple    (40968)
# define JO_COLOR_DarkCyan      (41216)
# define JO_COLOR_DarkGray      (41224)
# define JO_COLOR_MediumRed     (32784)
# define JO_COLOR_MediumGreen   (33280)
# define JO_COLOR_MediumYellow  (33296)
# define JO_COLOR_MediumBlue    (49152)
# define JO_COLOR_MediumPurple  (49168)
# define JO_COLOR_MediumCyan    (49664)
# define JO_COLOR_MediumWhite   (49680)
# define JO_COLOR_SemiRed       (32792)
# define JO_COLOR_SemiGreen     (33536)
# define JO_COLOR_SemiYellow    (33560)
# define JO_COLOR_SemiBlue      (57344)
# define JO_COLOR_SemiPurple    (57368)
# define JO_COLOR_SemiCyan      (58112)

# define JO_COLOR_Transparent   (0)

# define JO_COLOR_SATURN(C)         (JO_DIV_BY_8(C) & 0x1f)
# define JO_COLOR_SATURN_RGB(R,G,B) ((jo_color)(0x8000 | ((B) << 10) | ((G) << 5) | (R)))
# define JO_COLOR_SATURN_MSB        (0x8000)
# define JO_COLOR_SATURN_GET_R(C)   ((C) & 0x1f)
# define JO_COLOR_SATURN_GET_G(C)   (((C) >> 5) & 0x1f)
# define JO_COLOR_SATURN_GET_B(C)   (((C) >> 10) & 0x1f)

# define JO_COLOR_RGB(R,G,B)        JO_COLOR_SATURN_RGB(JO_COLOR_SATURN(R), JO_COLOR_SATURN(G), JO_COLOR_SATURN(B))

static  __jo_force_inline jo_color  jo_color_mix(const jo_color a, const jo_color b, const int t)
{
    int                             r;
    int                             g;
    int                             bl;
 
    r = (a & 31) + (((b & 31) - (a & 31)) * t >> 8);
    g = ((a >> 5) & 31) + ((((b >> 5) & 31) - ((a >> 5) & 31)) * t >> 8);
    bl = ((a >> 10) & 31) + ((((b >> 10) & 31) - ((a >> 10) & 31)) * t >> 8);
    return (JO_COLOR_SATURN_RGB(r, g, bl));
}
 

void    jo_set_screen_color_filter_a(const jo_scroll_screen screens, const short r, const short g, const short b);

void    jo_set_screen_color_filter_b(const jo_scroll_screen screens, const short r, const short g, const short b);

void    jo_disable_screen_color_filter(const jo_scroll_screen screens);

void    jo_fade_screens(const jo_scroll_screen screens, const short from, const short to, const int frames);

static  __jo_force_inline void      jo_disable_all_screen_color_filter(void)
{
    jo_disable_screen_color_filter(JO_ALL_SCROLL_SCREEN);
}
 
 
#endif /* !__JO_COLORS_H__ */
 
/*
** END OF FILE
*/