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#include <string.h>
#include "common.h"
#include "bitmap.h"
// #include "small-font.c"
#include "bd-font.c"
#include "uxn/uxn.h"
#include "uxn/uxn.c"
#include "uxn/devices/ppu.h"
#include "uxn/devices/ppu.c"
#include "uxn/roms/boot.c"
#include "text.h"
/*
Copyright (c) 2021 Bad Diode
Permission to use, copy, modify, and distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE.
*/
static size_t drawing_cycles = 0;
static Ppu ppu;
u8 reqdraw = 0;
static Device *devscreen;
void
nil_talk(Device *d, Uint8 b0, Uint8 w) {
(void)d;
(void)b0;
(void)w;
}
void
console_talk(Device *d, u8 b0, u8 w) {
if(!w) {
return;
}
switch(b0) {
case 0x8: txt_printf("%c", d->dat[0x8]); break;
case 0x9: txt_printf("0x%02x", d->dat[0x9]); break;
case 0xb: txt_printf("0x%04x", mempeek16(d->dat, 0xa)); break;
case 0xd: txt_printf("%s", &d->mem[mempeek16(d->dat, 0xc)]); break;
}
}
void
system_talk(Device *d, Uint8 b0, Uint8 w)
{
if(!w) {
d->dat[0x2] = d->u->wst.ptr;
d->dat[0x3] = d->u->rst.ptr;
} else {
putcolors(&ppu, &d->dat[0x8]);
reqdraw = 1;
}
(void)b0;
}
void
screen_talk(Device *d, Uint8 b0, Uint8 w) {
// profile_start();
if(w && b0 == 0xe) {
Uint16 x = mempeek16(d->dat, 0x8);
Uint16 y = mempeek16(d->dat, 0xa);
Uint8 *addr = &d->mem[mempeek16(d->dat, 0xc)];
Uint8 *layer = d->dat[0xe] >> 4 & 0x1 ? ppu.fg : ppu.bg;
Uint8 mode = d->dat[0xe] >> 5;
if(!mode) {
putpixel(&ppu, layer, x, y, d->dat[0xe] & 0x3);
} else if(mode-- & 0x1) {
puticn(&ppu, layer, x, y, addr, d->dat[0xe] & 0xf, mode & 0x2, mode & 0x4);
} else {
putchr(&ppu, layer, x, y, addr, d->dat[0xe] & 0xf, mode & 0x2, mode & 0x4);
}
reqdraw = 1;
}
// int cycles = profile_stop();
// drawing_cycles += cycles;
}
void
init_uxn(Uxn *u) {
// Initialize PPU.
initppu(&ppu, 30, 20, 0);
// Copy rom to VM.
memcpy(u->ram.dat + PAGE_PROGRAM, uxn_rom, sizeof(uxn_rom));
// Prepare devices.
portuxn(u, 0x0, "system", system_talk);
portuxn(u, 0x1, "console", console_talk);
devscreen = portuxn(u, 0x2, "screen", screen_talk);
portuxn(u, 0x3, "---", nil_talk);
portuxn(u, 0x4, "---", nil_talk);
portuxn(u, 0x5, "---", nil_talk);
portuxn(u, 0x6, "---", nil_talk);
portuxn(u, 0x7, "---", nil_talk);
portuxn(u, 0x8, "---", nil_talk);
portuxn(u, 0x9, "---", nil_talk);
portuxn(u, 0xa, "---", nil_talk);
portuxn(u, 0xb, "---", nil_talk);
portuxn(u, 0xc, "---", nil_talk);
portuxn(u, 0xd, "---", nil_talk);
portuxn(u, 0xe, "---", nil_talk);
portuxn(u, 0xf, "---", nil_talk);
mempoke16(devscreen->dat, 2, ppu.hor * 8);
mempoke16(devscreen->dat, 4, ppu.ver * 8);
}
int main(void) {
// Register interrupts.
irq_init();
irs_set(IRQ_VBLANK, irs_stub);
// Initialize VM.
Uxn u = {0};
init_uxn(&u);
// Initialize text engine.
txt_init_hybrid(
TXT_MODE_HYBRID,
(Font){
.data = bd_font,
.char_height = 8,
.char_width = 8,
}, &ppu.fg);
// Main loop.
int frame_counter = 0;
evaluxn(&u, 0x0100);
while(true) {
bios_vblank_wait();
poll_keys();
profile_start();
evaluxn(&u, mempeek16(devscreen->dat, 0));
flipbuf(&ppu);
int eval_cycles = profile_stop();
// txt_position(0,0);
// txt_printf("FRAME: %d \n", frame_counter);
// txt_printf("EVAL: %d \n", eval_cycles);
drawing_cycles = 0;
frame_counter++;
}
return 0;
}
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