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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 <stdio.h>
#include "libblit.h"
/* --------------------------------------------------------------------------- */
int pixel_color8 = 15 ;
uint16_t pixel_color16 = 0xFFFF ;
uint32_t pixel_color32 = 0xFFFFFFFF ;
uint16_t pixel_color16_alpha = 0xFFFF ;
int pixel_alpha = 255;
uint8_t * pixel_alpha8 = NULL ;
uint16_t * pixel_alpha16 = NULL ;
/* --------------------------------------------------------------------------- */
/*
* FUNCTION : gr_get_pixel
*
* Read a pixel from a bitmap
*
* PARAMS :
* dest Destination bitmap
* x, y Pixel coordinates
*
* RETURN VALUE :
* 1, 8 or 16-bit integer with the pixel value
*
*/
int gr_get_pixel( GRAPH * dest, int x, int y )
{
if ( x < 0 || y < 0 || x >= ( int ) dest->width || y >= ( int ) dest->height ) return -1 ;
switch ( dest->format->depth )
{
case 1:
return (( *( uint8_t * )( dest->data + dest->pitch * y + ( x >> 3 ) ) ) & ( 0x80 >> ( x & 7 ) ) ) ? 1 : 0;
case 8:
return *(( uint8_t * ) dest->data + dest->pitch * y + x ) ;
case 16:
return *( uint16_t * )(( uint8_t * ) dest->data + dest->pitch * y + ( x << 1 ) ) ;
case 32:
return *( uint32_t * )(( uint8_t * ) dest->data + dest->pitch * y + ( x << 2 ) ) ;
}
return -1;
}
/* --------------------------------------------------------------------------- */
/*
* FUNCTION : gr_put_pixel
*
* Paint a pixel with no clipping whatsoever, except by
* the bitmap's dimensions
*
* PARAMS :
* dest Destination bitmap
* x, y Pixel coordinates
* color 1, 8 or 16-bit pixel value
*
* RETURN VALUE :
* None
*
*/
void gr_put_pixel( GRAPH * dest, int x, int y, int color )
{
if ( x < 0 || y < 0 || x >= ( int ) dest->width || y >= ( int ) dest->height ) return ;
switch ( dest->format->depth )
{
case 1:
if ( color )
*(( uint8_t * ) dest->data + dest->pitch * y + ( x >> 3 ) ) |= ( 0x80 >> ( x & 7 ) ) ;
else
*(( uint8_t * ) dest->data + dest->pitch * y + ( x >> 3 ) ) &= ~( 0x80 >> ( x & 7 ) ) ;
break;
case 8:
_Pixel8(( uint8_t * ) dest->data + dest->pitch * y + x , color );
break;
case 16:
_Pixel16(( uint8_t * ) dest->data + dest->pitch * y + ( x << 1 ), color, gr_alpha16( pixel_alpha )[ color ] ) ;
break;
case 32:
{
uint32_t * ptr = ( uint32_t * ) (( uint8_t * ) dest->data + dest->pitch * y + ( x << 2 )) ;
if ( pixel_alpha == 255 && ( color & 0xff000000 ) == 0xff000000 )
{
*ptr = color ;
}
else
{
unsigned int _f = color & 0xff000000, _f2 ;
unsigned int r, g, b ;
_f = ( _f >> 24 ) * pixel_alpha / 255 ;
_f2 = 255 - _f ;
if ( _f != 0x000000ff )
{
r = ( ( color & 0x00ff0000 ) * _f + (( *ptr & 0x00ff0000 ) * _f2 ) ) >> 8 ;
g = ( ( color & 0x0000ff00 ) * _f + (( *ptr & 0x0000ff00 ) * _f2 ) ) >> 8 ;
b = ( ( color & 0x000000ff ) * _f + (( *ptr & 0x000000ff ) * _f2 ) ) >> 8 ;
if ( r > 0x00ff0000 ) r = 0x00ff0000 ; else r &= 0x00ff0000 ;
if ( g > 0x0000ff00 ) g = 0x0000ff00 ; else g &= 0x0000ff00 ;
if ( b > 0x000000ff ) b = 0x000000ff ; else b &= 0x000000ff ;
*ptr = ( _f << 24 ) | r | g | b ;
}
else
{
r = ( ( color & 0x00ff0000 ) * pixel_alpha + (( *ptr & 0x00ff0000 ) * _f2 ) ) >> 8 ;
g = ( ( color & 0x0000ff00 ) * pixel_alpha + (( *ptr & 0x0000ff00 ) * _f2 ) ) >> 8 ;
b = ( ( color & 0x000000ff ) * pixel_alpha + (( *ptr & 0x000000ff ) * _f2 ) ) >> 8 ;
if ( r > 0x00ff0000 ) r = 0x00ff0000 ; else r &= 0x00ff0000 ;
if ( g > 0x0000ff00 ) g = 0x0000ff00 ; else g &= 0x0000ff00 ;
if ( b > 0x000000ff ) b = 0x000000ff ; else b &= 0x000000ff ;
*ptr = 0xff000000 | r | g | b ;
}
}
}
break;
}
if ( color )
{
dest->modified = 2 ;
dest->info_flags &= ~GI_CLEAN;
}
else
{
dest->modified = 1 ; /* Don't needs analysis */
dest->info_flags &= ~GI_NOCOLORKEY;
}
}
/* --------------------------------------------------------------------------- */
/*
* FUNCTION : gr_put_pixelc
*
* Paint a pixel using a clipping region
*
* PARAMS :
* dest Destination bitmap
* x, y Pixel coordinates
* color 1, 8 or 16-bit pixel value
*
* RETURN VALUE :
* None
*
*/
void gr_put_pixelc( GRAPH * dest, REGION * clip, int x, int y, int color )
{
if ( clip && x >= clip->x && x <= clip->x2 && y >= clip->y && y <= clip->y2 )
gr_put_pixel( dest, x, y, color );
}
/* --------------------------------------------------------------------------- */
/*
* FUNCTION : gr_setcolor
*
* Sets the drawing color
*
* PARAMS :
* alpha New color (16 bits if 16 bits enabled)
*
* RETURN VALUE :
* None
*
*/
void gr_setcolor( int c )
{
/*
int r, g, b;
if ( c )
{
if ( sys_pixel_format->depth != 8 )
{
gr_get_rgb( c, &r, &g, &b );
pixel_color8 = gr_find_nearest_color( r, g, b );
}
else
{
}
}
else
pixel_color8 = 0;
*/
/* Fix this */
pixel_color8 = c;
pixel_color16 = c ;
pixel_color32 = c ;
if ( sys_pixel_format->depth == 16 && pixel_alpha != 255 ) pixel_color16_alpha = gr_alpha16( pixel_alpha )[ pixel_color16 ];
}
/* --------------------------------------------------------------------------- */
/*
* FUNCTION : gr_setalpha
*
* Sets the drawing alpha value for primitives
*
* PARAMS :
* alpha New alpha (0-255)
*
* RETURN VALUE :
* None
*
*/
void gr_setalpha( int value )
{
value &= 0xFF;
pixel_alpha = value;
if ( sys_pixel_format->depth == 16 )
{
pixel_alpha8 = gr_alpha8( value );
pixel_alpha16 = gr_alpha16( 255 - value );
pixel_color16_alpha = gr_alpha16( value )[ pixel_color16 ];
}
else
{
pixel_alpha8 = gr_alpha8( value );
}
}
/* --------------------------------------------------------------------------- */
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