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/* ****************************************************************************
* bmp_16_or_cl.c -- Display a 16x16 BMP, using ORs and clipping.
*
* Copyright (C) 2011 Pierre Le Gall <legallpierre89@gmail.com>
* Copyright (C) 2016-2017 Thomas "Cakeisalie5" Touhey <thomas@touhey.fr>
*
* This file is part of the 'casiowin/monochromelib' module in libcarrot, an
* experimental modular libc project.
*
* This file 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 file 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 Lesser General Lesser Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this file. If not, see <http://www.gnu.org/licenses/>.
* ************************************************************************* */
#include <monochrome.h>
void ML_bmp_16_or_cl(const unsigned short *bmp, int x, int y)
{
unsigned long line;
char i, shift, begin=0, end=16, bool1=1, bool2=1, bool3=1, *screen,
*p=(char*)&line+1;
if(!bmp || x<-15 || x>127 || y<-15 || y>63) return;
if(y < 0) begin = -y;
if(y > 48) end = 64-y;
shift = 8-(x&7);
if(x < 0) bool1 = 0;
if(x<-8 || x>119) bool2 = 0;
if(x>111 || shift==8) bool3 = 0;
screen = ML_vram_adress()+(y+begin<<4)+(x>>3);
for(i=begin ; i<end ; i++)
{
line = bmp[i]<<shift;
if(bool1) screen[0] |= *p;
if(bool2) screen[1] |= *(p+1);
if(bool3) screen[2] |= *(p+2);
screen += 16;
}
}
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