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/*
ds81 - Nintendo DS ZX81 emulator.
Copyright (C) 2006 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 "framebuffer.h"
/* ---------------------------------------- STATIC DATA
*/
#define WIDTH 256
#define SCAN 128
#define HEIGHT 192
static uint16 *buff;
static uint16 *pal;
static uint8 font[]=
{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x08, 0x08, 0x08, 0x08, 0x00, 0x08, 0x00,
0x00, 0x24, 0x24, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x24, 0x7e, 0x24, 0x24, 0x7e, 0x24, 0x00,
0x00, 0x10, 0x7c, 0x14, 0x7c, 0x50, 0x7c, 0x10,
0x00, 0x46, 0x26, 0x10, 0x08, 0x64, 0x62, 0x00,
0x00, 0x08, 0x14, 0x08, 0x54, 0x22, 0x5c, 0x00,
0x00, 0x10, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x20, 0x10, 0x10, 0x10, 0x10, 0x20, 0x00,
0x00, 0x04, 0x08, 0x08, 0x08, 0x08, 0x04, 0x00,
0x00, 0x00, 0x28, 0x10, 0x7c, 0x10, 0x28, 0x00,
0x00, 0x00, 0x10, 0x10, 0x7c, 0x10, 0x10, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x10, 0x08,
0x00, 0x00, 0x00, 0x00, 0x7c, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x00,
0x00, 0x00, 0x40, 0x20, 0x10, 0x08, 0x04, 0x00,
0x00, 0x3c, 0x62, 0x52, 0x4a, 0x46, 0x3c, 0x00,
0x00, 0x18, 0x14, 0x10, 0x10, 0x10, 0x7c, 0x00,
0x00, 0x3c, 0x42, 0x40, 0x3c, 0x02, 0x7e, 0x00,
0x00, 0x3c, 0x42, 0x30, 0x40, 0x42, 0x3c, 0x00,
0x00, 0x10, 0x18, 0x14, 0x12, 0x7e, 0x10, 0x00,
0x00, 0x7e, 0x02, 0x3e, 0x40, 0x42, 0x3c, 0x00,
0x00, 0x3c, 0x02, 0x3e, 0x42, 0x42, 0x3c, 0x00,
0x00, 0x7e, 0x40, 0x20, 0x10, 0x08, 0x08, 0x00,
0x00, 0x3c, 0x42, 0x3c, 0x42, 0x42, 0x3c, 0x00,
0x00, 0x3c, 0x42, 0x42, 0x7c, 0x40, 0x3c, 0x00,
0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x08, 0x00,
0x00, 0x00, 0x08, 0x00, 0x00, 0x08, 0x08, 0x04,
0x00, 0x00, 0x20, 0x10, 0x08, 0x10, 0x20, 0x00,
0x00, 0x00, 0x00, 0x7c, 0x00, 0x7c, 0x00, 0x00,
0x00, 0x00, 0x08, 0x10, 0x20, 0x10, 0x08, 0x00,
0x00, 0x3c, 0x42, 0x20, 0x10, 0x00, 0x10, 0x00,
0x00, 0x3c, 0x52, 0x6a, 0x7a, 0x02, 0x3c, 0x00,
0x00, 0x3c, 0x42, 0x42, 0x7e, 0x42, 0x42, 0x00,
0x00, 0x3e, 0x42, 0x3e, 0x42, 0x42, 0x3e, 0x00,
0x00, 0x3c, 0x42, 0x02, 0x02, 0x42, 0x3c, 0x00,
0x00, 0x1e, 0x22, 0x42, 0x42, 0x22, 0x1e, 0x00,
0x00, 0x7e, 0x02, 0x3e, 0x02, 0x02, 0x7e, 0x00,
0x00, 0x7e, 0x02, 0x3e, 0x02, 0x02, 0x02, 0x00,
0x00, 0x3c, 0x42, 0x02, 0x72, 0x42, 0x3c, 0x00,
0x00, 0x42, 0x42, 0x7e, 0x42, 0x42, 0x42, 0x00,
0x00, 0x7c, 0x10, 0x10, 0x10, 0x10, 0x7c, 0x00,
0x00, 0x40, 0x40, 0x40, 0x42, 0x42, 0x3c, 0x00,
0x00, 0x22, 0x12, 0x0e, 0x12, 0x22, 0x42, 0x00,
0x00, 0x02, 0x02, 0x02, 0x02, 0x02, 0x7e, 0x00,
0x00, 0x42, 0x66, 0x5a, 0x42, 0x42, 0x42, 0x00,
0x00, 0x42, 0x46, 0x4a, 0x52, 0x62, 0x42, 0x00,
0x00, 0x3c, 0x42, 0x42, 0x42, 0x42, 0x3c, 0x00,
0x00, 0x3e, 0x42, 0x42, 0x3e, 0x02, 0x02, 0x00,
0x00, 0x3c, 0x42, 0x42, 0x4a, 0x52, 0x3c, 0x00,
0x00, 0x3e, 0x42, 0x42, 0x3e, 0x22, 0x42, 0x00,
0x00, 0x3c, 0x02, 0x3c, 0x40, 0x42, 0x3c, 0x00,
0x00, 0x7f, 0x08, 0x08, 0x08, 0x08, 0x08, 0x00,
0x00, 0x42, 0x42, 0x42, 0x42, 0x42, 0x3c, 0x00,
0x00, 0x42, 0x42, 0x42, 0x42, 0x24, 0x18, 0x00,
0x00, 0x42, 0x42, 0x42, 0x42, 0x5a, 0x24, 0x00,
0x00, 0x42, 0x24, 0x18, 0x18, 0x24, 0x42, 0x00,
0x00, 0x41, 0x22, 0x14, 0x08, 0x08, 0x08, 0x00,
0x00, 0x7e, 0x20, 0x10, 0x08, 0x04, 0x7e, 0x00,
0x00, 0x70, 0x10, 0x10, 0x10, 0x10, 0x70, 0x00,
0x00, 0x00, 0x02, 0x04, 0x08, 0x10, 0x20, 0x00,
0x00, 0x0e, 0x08, 0x08, 0x08, 0x08, 0x0e, 0x00,
0x00, 0x08, 0x1c, 0x2a, 0x08, 0x08, 0x08, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff,
0x00, 0x38, 0x44, 0x1e, 0x04, 0x04, 0x7e, 0x00,
0x00, 0x00, 0x1c, 0x20, 0x3c, 0x22, 0x3c, 0x00,
0x00, 0x04, 0x04, 0x3c, 0x44, 0x44, 0x3c, 0x00,
0x00, 0x00, 0x38, 0x04, 0x04, 0x04, 0x38, 0x00,
0x00, 0x20, 0x20, 0x3c, 0x22, 0x22, 0x3c, 0x00,
0x00, 0x00, 0x1c, 0x22, 0x1e, 0x02, 0x3c, 0x00,
0x00, 0x30, 0x08, 0x18, 0x08, 0x08, 0x08, 0x00,
0x00, 0x00, 0x3c, 0x22, 0x22, 0x3c, 0x20, 0x1c,
0x00, 0x02, 0x02, 0x1e, 0x22, 0x22, 0x22, 0x00,
0x00, 0x08, 0x00, 0x0c, 0x08, 0x08, 0x1c, 0x00,
0x00, 0x20, 0x00, 0x20, 0x20, 0x20, 0x24, 0x18,
0x00, 0x04, 0x14, 0x0c, 0x0c, 0x14, 0x24, 0x00,
0x00, 0x08, 0x08, 0x08, 0x08, 0x08, 0x30, 0x00,
0x00, 0x00, 0x16, 0x2a, 0x2a, 0x2a, 0x2a, 0x00,
0x00, 0x00, 0x1e, 0x22, 0x22, 0x22, 0x22, 0x00,
0x00, 0x00, 0x1c, 0x22, 0x22, 0x22, 0x1c, 0x00,
0x00, 0x00, 0x1e, 0x22, 0x22, 0x1e, 0x02, 0x02,
0x00, 0x00, 0x3c, 0x22, 0x22, 0x3c, 0x20, 0x60,
0x00, 0x00, 0x38, 0x04, 0x04, 0x04, 0x04, 0x00,
0x00, 0x00, 0x1c, 0x02, 0x1c, 0x20, 0x1e, 0x00,
0x00, 0x08, 0x1c, 0x08, 0x08, 0x08, 0x30, 0x00,
0x00, 0x00, 0x22, 0x22, 0x22, 0x22, 0x1c, 0x00,
0x00, 0x00, 0x22, 0x22, 0x14, 0x14, 0x08, 0x00,
0x00, 0x00, 0x22, 0x2a, 0x2a, 0x2a, 0x14, 0x00,
0x00, 0x00, 0x22, 0x14, 0x08, 0x14, 0x22, 0x00,
0x00, 0x00, 0x22, 0x22, 0x22, 0x3c, 0x20, 0x1c,
0x00, 0x00, 0x3e, 0x10, 0x08, 0x04, 0x3e, 0x00,
0x00, 0x70, 0x10, 0x0c, 0x10, 0x10, 0x70, 0x00,
0x00, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00,
0x00, 0x0e, 0x08, 0x30, 0x08, 0x08, 0x0e, 0x00,
0x00, 0x28, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00,
0x3c, 0x42, 0x99, 0x85, 0x85, 0x99, 0x42, 0x3c
};
/* ---------------------------------------- PRIVATE INTERFACES
*/
static inline void Plot(int x, int y, int col)
{
uint16 *base;
uint16 cur;
int odd;
if (col == -1)
return;
odd = x&1;
x /= 2;
base = buff+x+y*SCAN;
cur = *base;
if (odd)
{
cur = (cur & 0xff) | (col<<8);
}
else
{
cur = (cur & 0xff00) | col;
}
*base = cur;
}
/* ---------------------------------------- PUBLIC INTERFACES
*/
void FB_Init(uint16 *vram, uint16 *palette)
{
buff = vram;
pal = palette;
pal[COL_BLACK] = RGB15(0,0,0);
pal[COL_WHITE] = RGB15(31,31,31);
pal[COL_RED] = RGB15(31,0,0);
pal[COL_GREEN] = RGB15(0,31,0);
pal[COL_BLUE] = RGB15(0,0,31);
pal[COL_GUISELECT] = RGB15(8,8,31);
pal[COL_GREY] = RGB15(15,15,15);
pal[COL_LIGHTGREY] = RGB15(22,22,22);
pal[COL_DARKGREY] = RGB15(8,8,8);
pal[COL_YELLOW] = RGB15(31,31,0);
}
void FB_LoadASCIITiles(uint16 *tiles)
{
uint8 *src;
int c;
int row;
int val;
int mask;
src = font;
for(c = 32; c < 127; c++)
{
for(row = 0; row < 8; row++)
{
for(mask = 1; mask < 0xff; mask<<=1)
{
if (*src & mask)
{
val = COL_WHITE;
}
else
{
val = 0;
}
mask <<= 1;
if (*src & mask)
{
val |= COL_WHITE << 8;
}
*tiles++ = val;
}
src++;
}
}
}
void FB_Print(const char *text, int x, int y, FB_Colour colour, FB_Colour paper)
{
int cx,cy;
int ch;
while(*text)
{
ch=((*text)-32)*8;
for(cy=0;cy<8;cy++)
{
for(cx=0;cx<8;cx++)
{
if (font[ch]&(1<<cx))
{
Plot(x+cx, y+cy, colour);
}
else
{
Plot(x+cx, y+cy, paper);
}
}
ch++;
}
x+=8;
text++;
}
}
void FB_Centre(const char *text, int y, FB_Colour colour, FB_Colour paper)
{
FB_Print(text,WIDTH/2-strlen(text)*4,y,colour,paper);
}
void FB_printf(int x, int y, FB_Colour colour, FB_Colour paper,
const char *format, ...)
{
char buff[80];
va_list va;
va_start(va,format);
vsnprintf(buff,sizeof buff,format,va);
va_end(va);
FB_Print(buff,x,y,colour,paper);
}
void FB_HLine(int x1, int x2, int y, FB_Colour colour)
{
uint16 *line;
line=buff+y*WIDTH+x1;
while(x1<=x2)
{
Plot(x1++,y,colour);
}
}
void FB_VLine(int x, int y1, int y2, FB_Colour colour)
{
while(y1<=y2)
{
Plot(x,y1++,colour);
}
}
void FB_Box(int x, int y, int w, int h, FB_Colour colour)
{
FB_HLine(x,x+w-1,y,colour);
FB_HLine(x,x+w-1,y+h-1,colour);
FB_VLine(x,y,y+h-1,colour);
FB_VLine(x+w-1,y,y+h-1,colour);
}
void FB_FillBox(int x, int y, int w, int h, FB_Colour colour)
{
while(h--)
{
FB_HLine(x,x+w-1,y++,colour);
}
}
void FB_Clear(void)
{
uint16 *p;
int f;
f=WIDTH*HEIGHT/2;
p=buff;
while(f--)
{
*p++=0;
}
}
void FB_Blit(sImage *img, int x, int y, int offset)
{
uint16 *dest;
uint16 *row;
uint8 *src;
uint16 pix;
int hww;
int ht;
int f;
x /= 2;
ht = img->height;
hww = img->width / 2;
dest = buff+x+y*SCAN;
src = img->image.data8;
for(f=0;f<16;f++)
{
pal[offset+f] = img->palette[f];
}
while(ht--)
{
row = dest;
for(f=0;f<hww;f++)
{
pix = *src++ + offset;
pix |= (*src++ + offset) << 8;
*row++ = pix;
}
dest += SCAN;
}
}
|
