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/* ****************************************************************************
 * bmp_8_and_cl.c -- Display a 8x8 BMP, using ANDs 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 governed by the CeCILL-C license under French law and abiding
 * by the rules of distribution of free software. You can use, modify and or
 * redistribute it under the terms of the CeCILL-C license as circulated by
 * CEA, CNRS and INRIA at the following URL: http://www.cecill.info
 *
 * As a counterpart to the access to the source code and rights to copy, modify
 * and redistribute granted by the license, users are provided only with a
 * limited warranty and the software's author, the holder of the economic
 * rights, and the successive licensors have only limited liability.
 *
 * In this respect, the user's attention is drawn to the risks associated with
 * loading, using, modifying and/or developing and reproducing the software by
 * the user in light of its specific status of free software, that may mean
 * that it is complicated to manipulate, and that also therefore means that it
 * is reserved for developers and experienced professionals having in-depth
 * computer knowledge. Users are therefore encouraged to load and test the
 * software's suitability as regards their requirements in conditions enabling
 * the security of their systems and/or data to be ensured and, more generally,
 * to use and operate it in the same conditions as regards security.
 *
 * The fact that you are presently reading this means you have had knowledge of
 * the CeCILL-C license and that you accept its terms.
 * ************************************************************************* */
#include <monochrome.h>

void ML_bmp_8_and_cl(const unsigned char *bmp, int x, int y)
{
	unsigned short line;
	char i, shift, begin=0, end=8, bool1=1, bool2=1, *screen, *p=(char*)&line;
	if(!bmp || x<-7 || x>127 || y<-7 || y>63) return;
	if(y < 0) begin = -y;
	if(y > 56) end = 64-y;
	shift = 8-(x&7);
	if(x < 0) bool1 = 0;
	if(x>120 || shift==8) bool2 = 0;
	screen = ML_vram_adress()+(y+begin<<4)+(x>>3);
	for(i=begin ; i<end ; i++)
	{
		line = ~((unsigned char)~bmp[i]<<shift);
		if(bool1) screen[0] &= *p;
		if(bool2) screen[1] &= *(p+1);
		screen += 16;
	}
}