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/*
ds48 - Nintendo DS ZX Spectrum emulator.
Copyright (C) 2007 Ian Cowburn <ianc@noddybox.co.uk>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
$Id$
*/
#include <nds.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include "textmode.h"
/* ---------------------------------------- STATIC DATA
*/
static int mapw;
static int maph;
static uint16 *text;
static int is_rot;
static void (*draw_string)(const char *str, int x, int y);
/* ---------------------------------------- PRIVATE INTERFACES
*/
static inline void Plot_Text(int x, int y, int c)
{
int xw;
int yw;
xw = x/32;
yw = y/32;
x %= 32;
y %= 32;
*(text + x + y*32 + (xw+yw) * 1024) = c;
}
static inline void Plot_RS(int x, int y, int c)
{
uint16 ch;
int odd;
uint16 *off;
odd = x&1;
off = text + x/2 + y*mapw/2;
ch = *off;
if (odd)
{
ch = (c<<8) | (ch&0xff);
}
else
{
ch = c | (ch&0xff00);
}
*off = ch;
}
static void Text_Put(const char *str, int x, int y)
{
while(*str && x<mapw)
{
Plot_Text(x,y,*str - 32);
x++;
str++;
}
}
static void RS_Put(const char *str, int x, int y)
{
while(*str && x<mapw)
{
Plot_RS(x,y,*str - 32);
x++;
str++;
}
}
/* ---------------------------------------- PUBLIC INTERFACES
*/
void TM_Init(uint16 *vram, int map_width, int map_height, int map_is_rotation)
{
text = vram;
mapw = map_width;
maph = map_height;
is_rot = map_is_rotation;
draw_string = map_is_rotation ? RS_Put : Text_Put;
TM_Cls();
}
void TM_Cls(void)
{
uint16 *scr;
int f;
scr = text;
if (is_rot)
{
for(f=0;f<mapw*maph/2;f++)
{
*scr++=0;
}
}
else
{
for(f=0;f<mapw*maph;f++)
{
*scr++=0;
}
}
}
void TM_Put(int x, int y, const char *str)
{
draw_string(str,x,y);
}
void TM_printf(int x, int y, const char *format, ...)
{
char buff[128];
va_list va;
va_start(va,format);
vsnprintf(buff,sizeof buff,format,va);
va_end(va);
draw_string(buff,x,y);
}
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