mirror of https://git.sr.ht/~rabbits/uxn
363 lines
6.7 KiB
C
363 lines
6.7 KiB
C
#include <SDL2/SDL.h>
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#include <stdio.h>
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/*
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Copyright (c) 2021 Devine Lu Linvega
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Permission to use, copy, modify, and distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE.
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*/
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#include "uxn.h"
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#define HOR 32
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#define VER 16
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#define PAD 2
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#define SZ (HOR * VER * 16)
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typedef unsigned char Uint8;
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int WIDTH = 8 * HOR + 8 * PAD * 2;
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int HEIGHT = 8 * (VER + 2) + 8 * PAD * 2;
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int FPS = 30, GUIDES = 1, BIGPIXEL = 0, ZOOM = 2;
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Uint32 theme[] = {
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0x000000,
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0xFFFFFF,
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0x72DEC2,
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0x666666,
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0x222222};
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SDL_Window *gWindow;
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SDL_Renderer *gRenderer;
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SDL_Texture *gTexture;
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Uint32 *pixels;
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Device *devconsole, *devscreen, *devmouse, *devkey, *devsprite;
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#pragma mark - Helpers
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void
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clear(Uint32 *dst)
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{
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int v, h;
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for(v = 0; v < HEIGHT; v++)
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for(h = 0; h < WIDTH; h++)
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dst[v * WIDTH + h] = theme[0];
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}
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void
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putpixel(Uint32 *dst, int x, int y, int color)
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{
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if(x >= 0 && x < WIDTH - 8 && y >= 0 && y < HEIGHT - 8)
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dst[(y + PAD * 8) * WIDTH + (x + PAD * 8)] = theme[color];
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}
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void
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drawchr(Uint32 *dst, int x, int y, Uint8 *sprite)
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{
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int v, h;
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for(v = 0; v < 8; v++)
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for(h = 0; h < 8; h++) {
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int ch1 = ((sprite[v] >> h) & 0x1);
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int ch2 = (((sprite[v + 8] >> h) & 0x1) << 1);
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int clr = ch1 + ch2;
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int guides = GUIDES && !clr && ((x + y) / 8) % 2;
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putpixel(dst, x + 7 - h, y + v, guides ? 4 : clr);
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}
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}
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void
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drawicn(Uint32 *dst, int x, int y, Uint8 *sprite, int fg, int bg)
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{
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int v, h;
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for(v = 0; v < 8; v++)
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for(h = 0; h < 8; h++) {
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int ch1 = (sprite[v] >> (7 - h)) & 0x1;
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putpixel(dst, x + h, y + v, ch1 ? fg : bg);
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}
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}
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#pragma mark - Core
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int
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error(char *msg, const char *err)
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{
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printf("Error %s: %s\n", msg, err);
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return 0;
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}
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void
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redraw(Uint32 *dst)
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{
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SDL_UpdateTexture(gTexture, NULL, dst, WIDTH * sizeof(Uint32));
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SDL_RenderClear(gRenderer);
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SDL_RenderCopy(gRenderer, gTexture, NULL, NULL);
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SDL_RenderPresent(gRenderer);
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}
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void
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quit(void)
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{
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free(pixels);
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SDL_DestroyTexture(gTexture);
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gTexture = NULL;
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SDL_DestroyRenderer(gRenderer);
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gRenderer = NULL;
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SDL_DestroyWindow(gWindow);
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gWindow = NULL;
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SDL_Quit();
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exit(0);
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}
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int
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init(void)
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{
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if(SDL_Init(SDL_INIT_VIDEO) < 0)
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return error("Init", SDL_GetError());
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gWindow = SDL_CreateWindow("Uxn", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, WIDTH * ZOOM, HEIGHT * ZOOM, SDL_WINDOW_SHOWN);
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if(gWindow == NULL)
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return error("Window", SDL_GetError());
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gRenderer = SDL_CreateRenderer(gWindow, -1, 0);
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if(gRenderer == NULL)
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return error("Renderer", SDL_GetError());
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gTexture = SDL_CreateTexture(gRenderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STATIC, WIDTH, HEIGHT);
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if(gTexture == NULL)
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return error("Texture", SDL_GetError());
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if(!(pixels = (Uint32 *)malloc(WIDTH * HEIGHT * sizeof(Uint32))))
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return error("Pixels", "Failed to allocate memory");
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clear(pixels);
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return 1;
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}
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void
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echos(St8 *s, Uint8 len, char *name)
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{
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int i;
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printf("\n%s\n", name);
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for(i = 0; i < len; ++i) {
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if(i % 16 == 0)
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printf("\n");
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printf("%02x%c", s->dat[i], s->ptr == i ? '<' : ' ');
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}
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printf("\n\n");
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}
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void
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echom(Memory *m, Uint8 len, char *name)
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{
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int i;
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printf("\n%s\n", name);
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for(i = 0; i < len; ++i) {
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if(i % 16 == 0)
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printf("\n");
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printf("%02x ", m->dat[i]);
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}
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printf("\n\n");
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}
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void
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echof(Uxn *c)
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{
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printf("ended @ %d steps | hf: %x sf: %x sf: %x cf: %x\n",
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c->counter,
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getflag(&c->status, FLAG_HALT) != 0,
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getflag(&c->status, FLAG_SHORT) != 0,
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getflag(&c->status, FLAG_SIGN) != 0,
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getflag(&c->status, FLAG_COND) != 0);
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}
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void
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domouse(SDL_Event *event)
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{
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int x = event->motion.x / ZOOM;
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int y = event->motion.y / ZOOM;
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devmouse->mem[0] = (x >> 8) & 0xff;
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devmouse->mem[1] = x & 0xff;
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devmouse->mem[2] = (y >> 8) & 0xff;
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devmouse->mem[3] = y & 0xff;
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switch(event->type) {
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case SDL_MOUSEBUTTONUP:
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devmouse->mem[4] = 0;
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break;
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case SDL_MOUSEBUTTONDOWN:
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devmouse->mem[4] = event->button.button == SDL_BUTTON_LEFT;
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}
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}
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void
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dokey(SDL_Event *event)
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{
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(void)event;
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/* printf("key\n"); */
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}
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#pragma mark - Devices
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Uint8
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consoler(Device *d, Memory *m, Uint8 b)
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{
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(void)b;
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(void)d;
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return 0;
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}
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Uint8
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consolew(Device *d, Memory *m, Uint8 b)
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{
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(void)d;
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if(b)
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printf("%c", b);
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fflush(stdout);
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return 0;
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}
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Uint8
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ppur(Device *d, Memory *m, Uint8 b)
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{
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switch(b) {
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case 0: return (WIDTH >> 8) & 0xff;
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case 1: return WIDTH & 0xff;
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case 2: return (HEIGHT >> 8) & 0xff;
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case 3: return HEIGHT & 0xff;
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}
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return d->mem[b];
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}
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Uint8
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ppuw(Device *d, Memory *m, Uint8 b)
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{
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d->mem[d->len++] = b;
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if(d->len > 5) {
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putpixel(pixels,
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(d->mem[2] << 8) + d->mem[3],
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(d->mem[0] << 8) + d->mem[1],
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d->mem[4]);
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if(d->mem[5])
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redraw(pixels);
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d->len = 0;
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}
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return 0;
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}
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Uint8
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ppusr(Device *d, Memory *m, Uint8 b)
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{
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return 0;
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}
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Uint8
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ppusw(Device *d, Memory *m, Uint8 b)
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{
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d->mem[d->len++] = b;
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if(d->len > 6) {
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Uint16 x = (d->mem[2] << 8) + d->mem[3];
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Uint16 y = (d->mem[0] << 8) + d->mem[1];
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Uint8 *chr = &m->dat[(d->mem[4] << 8) + d->mem[5]];
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drawchr(pixels, x, y, chr);
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if(d->mem[6])
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redraw(pixels);
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d->len = 0;
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}
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return 0;
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}
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Uint8
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mouser(Device *d, Memory *m, Uint8 b)
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{
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return d->mem[b];
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}
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Uint8
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mousew(Device *d, Memory *m, Uint8 b)
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{
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(void)d;
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(void)b;
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return 0;
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}
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Uint8
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keyr(Device *d, Memory *m, Uint8 b)
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{
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(void)d;
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(void)b;
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return 0;
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}
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Uint8
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keyw(Device *d, Memory *m, Uint8 b)
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{
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(void)d;
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(void)b;
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return 0;
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}
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#pragma mark - Generics
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int
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start(Uxn *u)
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{
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int ticknext = 0;
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evaluxn(u, u->vreset);
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echos(&u->wst, 0x40, "stack");
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echom(&u->ram, 0x40, "ram");
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echof(u);
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while(1) {
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int tick = SDL_GetTicks();
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SDL_Event event;
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if(tick < ticknext)
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SDL_Delay(ticknext - tick);
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ticknext = tick + (1000 / FPS);
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evaluxn(u, u->vframe);
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while(SDL_PollEvent(&event) != 0) {
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switch(event.type) {
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case SDL_QUIT: quit(); break;
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case SDL_MOUSEBUTTONUP:
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case SDL_MOUSEBUTTONDOWN:
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case SDL_MOUSEMOTION: domouse(&event); break;
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case SDL_KEYDOWN: dokey(&event); break;
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case SDL_WINDOWEVENT:
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if(event.window.event == SDL_WINDOWEVENT_EXPOSED)
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redraw(pixels);
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break;
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}
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}
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}
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}
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int
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main(int argc, char **argv)
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{
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Uxn u;
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if(argc < 2)
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return error("Input", "Missing");
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if(!bootuxn(&u))
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return error("Boot", "Failed");
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if(!loaduxn(&u, argv[1]))
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return error("Load", "Failed");
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if(!init())
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return error("Init", "Failed");
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devconsole = portuxn(&u, "console", consoler, consolew);
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devscreen = portuxn(&u, "ppu", ppur, ppuw);
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devmouse = portuxn(&u, "mouse", mouser, mousew);
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devkey = portuxn(&u, "key", keyr, keyw);
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devsprite = portuxn(&u, "ppu-sprite", ppusr, ppusw);
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start(&u);
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echos(&u.wst, 0x40, "stack");
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echom(&u.ram, 0x40, "ram");
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echof(&u);
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quit();
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return 0;
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}
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