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/*
* Copyright � 2006-2016 SplinterGU (Fenix/Bennugd)
* Copyright � 2002-2006 Fenix Team (Fenix)
* Copyright � 1999-2002 Jos� Luis Cebri�n Pag�e (Fenix)
*
* This file is part of Bennu - Game Development
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
*
* 3. This notice may not be removed or altered from any source
* distribution.
*
*/
#include <string.h>
#include <stdlib.h>
#include "librender.h"
/* -------------------------------------------------------------------------- */
SDL_Color vpalette[ 256 ] ;
int fade_inc = 0 ;
int fade_on = 0 ;
int fade_set = 0 ;
int fade_step = 64 ;
SDL_Color fade_from ;
SDL_Color fade_to ;
SDL_Color fade_pos = { 100, 100, 100 };
/* -------------------------------------------------------------------------- */
static void activate_vpalette()
{
int n ;
if ( !screen ) return ;
if (( sys_pixel_format ) && ( sys_pixel_format->palette ) )
{
if ( sys_pixel_format->depth > 8 )
{
for ( n = 0 ; n < 256 ; n++ )
sys_pixel_format->palette->colorequiv[ n ] = SDL_MapRGB( screen->format, sys_pixel_format->palette->rgb[ n ].r, sys_pixel_format->palette->rgb[ n ].g, sys_pixel_format->palette->rgb[ n ].b ) ;
}
else
{
for ( n = 0 ; n < 256 ; n++ )
{
if ( fade_pos.r <= 100 )
vpalette[ n ].r = sys_pixel_format->palette->rgb[ n ].r * fade_pos.r / 100;
else
vpalette[ n ].r = sys_pixel_format->palette->rgb[ n ].r + ( 255 - sys_pixel_format->palette->rgb[ n ].r ) * ( fade_pos.r - 100 ) / 100;
if ( fade_pos.g <= 100 )
vpalette[ n ].g = sys_pixel_format->palette->rgb[ n ].g * fade_pos.g / 100;
else
vpalette[ n ].g = sys_pixel_format->palette->rgb[ n ].g + ( 255 - sys_pixel_format->palette->rgb[ n ].g ) * ( fade_pos.g - 100 ) / 100;
if ( fade_pos.b <= 100 )
vpalette[ n ].b = sys_pixel_format->palette->rgb[ n ].b * fade_pos.b / 100;
else
vpalette[ n ].b = sys_pixel_format->palette->rgb[ n ].b + ( 255 - sys_pixel_format->palette->rgb[ n ].b ) * ( fade_pos.b - 100 ) / 100;
}
if ( scale_screen )
SDL_SetColors( scale_screen, vpalette, 0, 256 ) ;
else
SDL_SetColors( screen, vpalette, 0, 256 ) ;
}
}
}
/* -------------------------------------------------------------------------- */
void gr_fade_init( int r, int g, int b, int speed )
{
if ( fade_pos.r == r && fade_pos.g == g && fade_pos.b == b )
{
GLODWORD( librender, FADING ) = 0 ;
fade_on = 0 ;
return ;
}
fade_inc = speed;
fade_step = 0;
fade_on = 1 ;
fade_from = fade_pos;
fade_to.r = ( r > 200 ) ? 200 : r ;
fade_to.g = ( g > 200 ) ? 200 : g ;
fade_to.b = ( b > 200 ) ? 200 : b ;
GLODWORD( librender, FADING ) = 1 ;
}
/* -------------------------------------------------------------------------- */
void gr_fade_step()
{
if ( fade_on )
{
fade_set = 1 ;
GLODWORD( librender, FADING ) = 1 ;
fade_step += fade_inc ;
if ( fade_step < 0 )
{
GLODWORD( librender, FADING ) = 0 ;
fade_step = 0 ;
fade_on = 0 ;
}
if ( fade_step >= 64 )
{
GLODWORD( librender, FADING ) = 0 ;
fade_step = 64 ;
fade_on = 0 ;
}
fade_pos.r = ( fade_to.r * fade_step + fade_from.r * ( 64 - fade_step ) ) / 64;
fade_pos.g = ( fade_to.g * fade_step + fade_from.g * ( 64 - fade_step ) ) / 64;
fade_pos.b = ( fade_to.b * fade_step + fade_from.b * ( 64 - fade_step ) ) / 64;
if (
( fade_step + fade_inc < 0 || fade_step + fade_inc > 64 ) &&
( fade_pos.r == 100 && fade_pos.g == 100 && fade_pos.b == 100 ) )
{
GLODWORD( librender, FADING ) = 0 ;
fade_step = 100 ;
fade_on = 0;
}
}
if ( fade_set )
{
if ( !fade_on && fade_to.r == 100 && fade_to.g == 100 && fade_to.b == 100 ) fade_set = 0;
activate_vpalette() ;
if ( scrbitmap->format->depth > 8 )
{
gr_fade16( scrbitmap, fade_pos.r, fade_pos.g, fade_pos.b );
}
}
}
/* -------------------------------------------------------------------------- */
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