mirror of
https://github.com/sehugg/8bitworkshop.git
synced 2024-12-21 06:29:48 +00:00
257 lines
10 KiB
C
257 lines
10 KiB
C
|
|
#include "bios.h"
|
|
|
|
#pragma opt_code_speed
|
|
|
|
#define LOCHAR 0x20
|
|
#define HICHAR 0x63
|
|
|
|
const byte LMASK[4] = {0xff, 0x3f, 0x0f, 0x03};
|
|
|
|
static void hline(byte x1, byte x2, byte y, byte pattern) {
|
|
byte xb1 = x1/4;
|
|
byte xb2 = x2/4;
|
|
byte* dest = &vidmem[y][xb1];
|
|
byte mask = LMASK[x1&3];
|
|
if (xb1 == xb2) {
|
|
mask &= ~LMASK[x2&3];
|
|
}
|
|
*dest = *dest & ~mask | (mask & pattern);
|
|
if (xb1 != xb2) {
|
|
dest++;
|
|
while (++xb1 < xb2) {
|
|
*dest++ = pattern;
|
|
}
|
|
*dest = *dest & LMASK[x2&3] | (~LMASK[x2&3] & pattern);
|
|
}
|
|
}
|
|
|
|
// Fill rect (E,D,C,B) color A
|
|
void RECTAN(const ContextBlock *ctx) {
|
|
for (byte y=_D; y<_D+_B; y++) {
|
|
hline(_E, _E+_C, y, _A);
|
|
}
|
|
}
|
|
|
|
const char BIGFONT[HICHAR-LOCHAR+1][7] = {/*{count:68,w:8,h:7,brev:1}*/
|
|
{0x00,0x00,0x00,0x00,0x00,0x00,0x00},{0x20,0x20,0x20,0x20,0x00,0x00,0x20},{0x50,0x50,0x00,0x00,0x00,0x00,0x00},{0x48,0xFC,0x48,0x48,0x48,0xFC,0x48},{0x20,0x78,0x80,0x70,0x08,0xF0,0x20},{0x00,0x48,0x10,0x20,0x40,0x90,0x00},{0x60,0x90,0x60,0xA0,0xA8,0x90,0x68},{0x60,0x60,0x20,0x00,0x00,0x00,0x00},{0x20,0x40,0x40,0x40,0x40,0x40,0x20},{0x40,0x20,0x20,0x20,0x20,0x20,0x40},{0x00,0xA8,0x70,0xF8,0x70,0xA8,0x00},{0x00,0x20,0x20,0xF8,0x20,0x20,0x00},{0x00,0x00,0x00,0x00,0x60,0x20,0x40},{0x00,0x00,0x00,0xF0,0x00,0x00,0x00},{0x00,0x00,0x00,0x00,0x00,0x60,0x60},{0x00,0x08,0x10,0x20,0x40,0x80,0x00},{0x70,0x88,0x88,0xA8,0x88,0x88,0x70},{0x20,0x60,0x20,0x20,0x20,0x20,0x70},{0x70,0x88,0x08,0x30,0x40,0x80,0xF8},{0x70,0x88,0x08,0x70,0x08,0x88,0x70},{0x10,0x30,0x50,0x90,0xF8,0x10,0x10},{0xF8,0x80,0x80,0x70,0x08,0x88,0x70},{0x70,0x88,0x80,0xF0,0x88,0x88,0x70},{0xF8,0x88,0x10,0x20,0x20,0x20,0x20},{0x70,0x88,0x88,0x70,0x88,0x88,0x70},{0x70,0x88,0x88,0x78,0x08,0x88,0x70},{0x00,0x00,0x60,0x00,0x60,0x00,0x00},{0x00,0x00,0x60,0x00,0x60,0x20,0x40},{0x10,0x20,0x40,0x80,0x40,0x20,0x10},{0x00,0x00,0xF8,0x00,0xF8,0x00,0x00},{0x40,0x20,0x10,0x08,0x10,0x20,0x40},{0x70,0x08,0x08,0x30,0x20,0x00,0x20},{0x70,0x88,0xB8,0xA8,0x90,0x80,0x70},{0x70,0x88,0x88,0xF8,0x88,0x88,0x88},{0xF0,0x88,0x88,0xF0,0x88,0x88,0xF0},{0x70,0x88,0x80,0x80,0x80,0x88,0x70},{0xF0,0x88,0x88,0x88,0x88,0x88,0xF0},{0xF8,0x80,0x80,0xF0,0x80,0x80,0xF8},{0xF8,0x80,0x80,0xF0,0x80,0x80,0x80},{0x70,0x88,0x80,0xB0,0x88,0x88,0x70},{0x88,0x88,0x88,0xF8,0x88,0x88,0x88},{0x70,0x20,0x20,0x20,0x20,0x20,0x70},{0x08,0x08,0x08,0x08,0x88,0x88,0x70},{0x88,0x90,0xA0,0xC0,0xA0,0x90,0x88},{0x80,0x80,0x80,0x80,0x80,0x80,0xF8},{0x88,0xD8,0xA8,0x88,0x88,0x88,0x88},{0x88,0xC8,0xA8,0xA8,0x98,0x88,0x88},{0xF8,0x88,0x88,0x88,0x88,0x88,0xF8},{0xF0,0x88,0x88,0xF0,0x80,0x80,0x80},{0x70,0x88,0x88,0xA8,0xA8,0x90,0x68},{0xF0,0x88,0x88,0xF0,0x90,0x90,0x88},{0x70,0x88,0x80,0x70,0x08,0x88,0x70},{0xF8,0x20,0x20,0x20,0x20,0x20,0x20},{0x88,0x88,0x88,0x88,0x88,0x88,0x70},{0x88,0x88,0x88,0x88,0x88,0x50,0x20},{0x88,0x88,0x88,0x88,0xA8,0xD8,0x88},{0x88,0x88,0x50,0x20,0x50,0x88,0x88},{0x88,0x88,0x50,0x20,0x20,0x20,0x20},{0xF8,0x08,0x10,0x20,0x40,0x80,0xF8},{0x70,0x40,0x40,0x40,0x40,0x40,0x70},{0x00,0x80,0x40,0x20,0x10,0x08,0x00},{0x70,0x10,0x10,0x10,0x10,0x10,0x70},{0x20,0x70,0xA8,0x20,0x20,0x20,0x00},{0x00,0x20,0x40,0xF8,0x40,0x20,0x00},{0x00,0x20,0x20,0x20,0xA8,0x70,0x20},{0x00,0x20,0x10,0xF8,0x10,0x20,0x00},{0x00,0x88,0x50,0x20,0x50,0x88,0x00},{0x00,0x20,0x00,0xF8,0x00,0x20,0x00}};
|
|
|
|
const char SMLFONT[HICHAR-LOCHAR+1][5] = {/*{count:68,w:5,h:5,brev:1}*/
|
|
{ 0x00,0x00,0x00,0x00,0x00 },{ 0x40,0x40,0x00,0x40,0x00 },{ 0xA0,0xA0,0x00,0x00,0x00 },{ 0x60,0xF0,0xF0,0x60,0x00 },{ 0x40,0xE0,0xE0,0x40,0x00 },{ 0x90,0x20,0x40,0x90,0x00 },{ 0xC0,0xB0,0xE0,0xD0,0x00 },{ 0x20,0x40,0x00,0x00,0x00 },{ 0x20,0x40,0x40,0x20,0x00 },{ 0x40,0x20,0x20,0x40,0x00 },{ 0x40,0xE0,0x40,0xA0,0x00 },{ 0x00,0x40,0xE0,0x40,0x00 },{ 0x00,0x00,0x00,0x60,0x20 },{ 0x00,0x00,0xE0,0x00,0x00 },{ 0x00,0x00,0x00,0x40,0x00 },{ 0x20,0x20,0x40,0x40,0x00 },{ 0xE0,0xA0,0xA0,0xA0,0xE0 },{ 0xC0,0x40,0x40,0x40,0xE0 },{ 0xE0,0x20,0xE0,0x80,0xE0 },{ 0xE0,0x20,0x60,0x20,0xE0 },{ 0xA0,0xA0,0xE0,0x20,0x20 },{ 0xE0,0x80,0xE0,0x20,0xE0 },{ 0xE0,0x80,0xE0,0xA0,0xE0 },{ 0xE0,0x20,0x40,0x40,0x40 },{ 0xE0,0xA0,0xE0,0xA0,0xE0 },{ 0xE0,0xA0,0xE0,0x20,0xE0 },{ 0x00,0x40,0x00,0x40,0x00 },{ 0x00,0x40,0x00,0x60,0x20 },{ 0x00,0x20,0x40,0x20,0x00 },{ 0x00,0xE0,0x00,0xE0,0x00 },{ 0x00,0x40,0x20,0x40,0x00 },{ 0xE0,0x20,0x60,0x00,0x40 },{ 0xF0,0x90,0x10,0xD0,0xF0 },{ 0x60,0xA0,0xE0,0xA0,0x00 },{ 0xC0,0xE0,0xA0,0xE0,0x00 },{ 0x60,0x80,0x80,0xE0,0x00 },{ 0xC0,0xA0,0xA0,0xC0,0x00 },{ 0xE0,0xC0,0x80,0xE0,0x00 },{ 0xE0,0xC0,0x80,0x80,0x00 },{ 0x60,0x80,0xA0,0xE0,0x00 },{ 0xA0,0xA0,0xE0,0xA0,0x00 },{ 0xE0,0x40,0x40,0xE0,0x00 },{ 0x60,0x20,0xA0,0xE0,0x00 },{ 0xA0,0xC0,0xC0,0xA0,0x00 },{ 0x80,0x80,0x80,0xE0,0x00 },{ 0xE0,0xE0,0xE0,0xA0,0x00 },{ 0xE0,0xA0,0xA0,0xA0,0x00 },{ 0xE0,0xA0,0xA0,0xE0,0x00 },{ 0xE0,0xA0,0xE0,0x80,0x00 },{ 0xE0,0xA0,0xE0,0xF0,0x00 },{ 0xE0,0xA0,0xC0,0xA0,0x00 },{ 0xE0,0x80,0x60,0xE0,0x00 },{ 0xE0,0x40,0x40,0x40,0x00 },{ 0xA0,0xA0,0xA0,0xE0,0x00 },{ 0xA0,0xA0,0xC0,0x80,0x00 },{ 0xA0,0xE0,0xE0,0xE0,0x00 },{ 0xA0,0x40,0xA0,0xA0,0x00 },{ 0xA0,0xE0,0x40,0x40,0x00 },{ 0xE0,0x20,0x40,0xE0,0x00 },{ 0x60,0x40,0x40,0x60,0x00 },{ 0x40,0x40,0x20,0x20,0x00 },{ 0x60,0x20,0x20,0x60,0x00 },{ 0x40,0xA0,0x00,0x00,0x00 },{ 0x00,0x00,0x00,0x00,0xF0 },{ 0x80,0x40,0x00,0x00,0x00 },{ 0x00,0x60,0xA0,0xE0,0x00 },{ 0x80,0xE0,0xA0,0xE0,0x00 },{ 0x00,0x60,0x80,0xE0,0x00 }};
|
|
|
|
// draw a letter
|
|
static byte draw_char(const FontDescriptor* font, byte ch, byte x, byte y, byte op) {
|
|
const byte* src = font->chartab + (ch-font->base_ch)*font->pattern_y;
|
|
byte* dest = &vmagic[y][x>>2];// destination address
|
|
byte magic = M_SHIFT(x) | M_XPAND | (op & 0x30);
|
|
// big sizes?
|
|
if (op & 0xc0) {
|
|
char buf[8]; // expansion buffer
|
|
char* mbuf = (buf - 0x4000);// make it magic
|
|
byte sc = 1 << (op >> 6); // 2x2 = 2, 4x4 = 4, 8x8 = 8
|
|
for (byte i=0; i<font->pattern_y; i++) {
|
|
// expand into magic buffer onto stack
|
|
hw_magic = M_XPAND;
|
|
hw_xpand = 0b1100; // on = 11, off = 00
|
|
// 2x2 size
|
|
mbuf[1] = mbuf[0] = *src++;
|
|
// 4x4 size
|
|
if (op & 0x80) {
|
|
byte b = buf[0];
|
|
mbuf[3] = mbuf[2] = buf[1];
|
|
mbuf[1] = mbuf[0] = b;
|
|
}
|
|
// 8x8 size
|
|
if ((op & 0xc0) == 0xc0) {
|
|
byte b = buf[0];
|
|
mbuf[7] = mbuf[6] = buf[3];
|
|
mbuf[5] = mbuf[4] = buf[2];
|
|
mbuf[3] = mbuf[2] = buf[1];
|
|
mbuf[1] = mbuf[0] = b;
|
|
}
|
|
// draw to screen (magic, again)
|
|
hw_xpand = op & 0xf;
|
|
for (byte j=0; j<sc; j++) {
|
|
hw_magic = magic; // reset flip flop
|
|
EXIT_CLIPDEST(dest);
|
|
for (byte k=0; k<sc; k++) {
|
|
byte b = buf[k];
|
|
*dest++ = b;
|
|
*dest++ = b;
|
|
}
|
|
dest += VBWIDTH-sc*2;
|
|
}
|
|
}
|
|
} else {
|
|
hw_xpand = op & 0xf;
|
|
for (byte i=0; i<font->pattern_y; i++) {
|
|
char b = *src++;
|
|
EXIT_CLIPDEST(dest);
|
|
hw_magic = magic; // reset flip flop
|
|
*dest++ = b; // expand lower nibble -> 1st byte
|
|
*dest++ = b; // expand upper nibble -> 2nd byte
|
|
*dest++ = 0; // leftover -> 3rd byte
|
|
dest += VBWIDTH-3; // we incremented 3 bytes for this line
|
|
}
|
|
}
|
|
return font->frame_x << (op >> 6);
|
|
}
|
|
|
|
#define FONT_IX ((const FontDescriptor*)ctx->regs.w.ix)
|
|
|
|
static void draw_string(ContextBlock *ctx, const char* str, byte x, byte y, byte op) {
|
|
do {
|
|
byte ch = *str++;
|
|
if (!ch) {
|
|
_E = x;
|
|
break;
|
|
}
|
|
if (ch < 0x20) {
|
|
x += draw_char(&FNTSYS, ' ', x, y, op); // TODO
|
|
} else if (ch < 0x64) {
|
|
x += draw_char(&FNTSYS, ch, x, y, op);
|
|
} else if (ch >= 0x80) {
|
|
x += draw_char(FONT_IX, ch, x, y, op);
|
|
} else {
|
|
/*
|
|
if (ch & 0x10) {
|
|
ctx->regs.b.ixl = *str++;
|
|
ctx->regs.b.ixh = *str++;
|
|
}
|
|
if (ch & 0x1)
|
|
_E = *str++;
|
|
if (ch & 0x2)
|
|
_D = *str++;
|
|
if (ch & 0x4)
|
|
_C = *str++;
|
|
*/
|
|
// TODO: only can change font
|
|
}
|
|
} while (1);
|
|
}
|
|
|
|
// String display routine (pass pointer to string)
|
|
void STRDIS2(ContextBlock *ctx, char *str) {
|
|
byte opts = _C;
|
|
byte x = _E;
|
|
byte y = _D;
|
|
void* fontdesc = (void*) ctx->regs.w.ix;
|
|
draw_string(ctx, str, x, y, opts); // TODO: opts
|
|
}
|
|
|
|
// String display routine
|
|
void STRDIS(ContextBlock *ctx) {
|
|
char* str = (char*) _HL;
|
|
STRDIS2(ctx, str);
|
|
}
|
|
|
|
// Character display routine
|
|
void CHRDIS(ContextBlock *ctx) {
|
|
char chstr[2];
|
|
chstr[0] = _A;
|
|
chstr[1] = 0;
|
|
STRDIS2(ctx, chstr);
|
|
}
|
|
|
|
// BCD routine
|
|
const char BCDTAB[18] = "0123456789*+,-./ ";
|
|
|
|
// DISNUM - (E.D) x/y (C) options (B) ext (HL) BCD-addr
|
|
void DISNUM(ContextBlock *ctx) {
|
|
// TODO: options, B
|
|
byte x = _E;
|
|
byte y = _D;
|
|
byte opt = _C;
|
|
byte ext = _B;
|
|
byte ndigits = ext & 63;
|
|
const FontDescriptor* font = (ext&64) ? &FNTSML : &FNTSYS;
|
|
byte add = (ext&64) ? 128 : 0;
|
|
byte noleadingzero = ext & 128;
|
|
byte* pbcd = (byte*) _HL;
|
|
pbcd += (ndigits-1)/2;
|
|
while (ndigits--) {
|
|
byte val = *pbcd;
|
|
if (ndigits & 1) {
|
|
val >>= 4;
|
|
} else {
|
|
val &= 15;
|
|
pbcd--;
|
|
}
|
|
if (val == 0 && noleadingzero) {
|
|
val = 16;
|
|
} else {
|
|
noleadingzero = 0;
|
|
}
|
|
x += draw_char(font, BCDTAB[val]+add, x, y, opt);
|
|
}
|
|
}
|
|
|
|
// write pattern (E,D,C,B) magic A @ HL
|
|
void WRIT(ContextBlock *ctx) {
|
|
byte w = _C;
|
|
byte h = _B;
|
|
byte x = _E;
|
|
byte y = _D;
|
|
byte magic = _A | (x & 3); // add X shift
|
|
byte* src = (byte*) _HL;
|
|
byte* dest = &vmagic[y][0]; // destination address
|
|
byte xb = (magic & M_FLOP) ? (39-(x>>2)) : (x>>2);
|
|
byte i,j,b;
|
|
// iterate through all lines
|
|
for (j=0; j<h; j++) {
|
|
EXIT_CLIPDEST(dest);
|
|
hw_magic = magic;
|
|
if (magic & M_XPAND) {
|
|
// when XPAND set, write twice as many bytes
|
|
for (i=0; i<w*2; i+=2) {
|
|
b = *src++;
|
|
// when FLOP set, sprite position is also mirrored
|
|
if (magic & M_FLOP) {
|
|
dest[xb-i] = b;
|
|
dest[xb-i-1] = b;
|
|
} else {
|
|
dest[xb+i] = b;
|
|
dest[xb+i+1] = b;
|
|
}
|
|
}
|
|
} else {
|
|
for (i=0; i<w; i++) {
|
|
// when FLOP set, sprite position is also mirrored
|
|
if (magic & M_FLOP) {
|
|
dest[xb-i] = *src++;
|
|
} else {
|
|
dest[xb+i] = *src++;
|
|
}
|
|
}
|
|
}
|
|
if (magic & M_FLOP)
|
|
dest[xb-i] = 0;
|
|
else
|
|
dest[xb+i] = 0;
|
|
dest += VBWIDTH;
|
|
}
|
|
}
|
|
|
|
// write sized pattern (E,D) magic A @ HL
|
|
void WRITP(ContextBlock *ctx) {
|
|
byte* src = (byte*) _HL;
|
|
// get size
|
|
_C = *src++;
|
|
_B = *src++;
|
|
// update src
|
|
_HL = (word) src;
|
|
WRIT(ctx);
|
|
}
|
|
|
|
// write relative pattern (E,D) magic A @ HL
|
|
void WRITR(ContextBlock *ctx) {
|
|
byte* src = (byte*) _HL;
|
|
// sub offset
|
|
_E -= *src++;
|
|
_D -= *src++;
|
|
// update src
|
|
_HL = (word) src;
|
|
WRITP(ctx);
|
|
}
|
|
|