505 lines
12 KiB
C
505 lines
12 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 48
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#define VER 32
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#define PAD 2
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#define RES (HOR * VER * 16)
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typedef struct {
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Uint16 x1, y1, x2, y2;
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} Rect2d;
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typedef struct {
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Uint8 reqdraw;
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Uint8 bg[RES], fg[RES];
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Rect2d bounds;
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} Screen;
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int WIDTH = 8 * HOR + 8 * PAD * 2;
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int HEIGHT = 8 * VER + 8 * PAD * 2;
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int FPS = 30, GUIDES = 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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Uint8 icons[][8] = {
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{0x00, 0x3c, 0x46, 0x4a, 0x52, 0x62, 0x3c, 0x00},
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{0x00, 0x18, 0x28, 0x08, 0x08, 0x08, 0x3e, 0x00},
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{0x00, 0x3c, 0x42, 0x02, 0x3c, 0x40, 0x7e, 0x00},
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{0x00, 0x3c, 0x42, 0x1c, 0x02, 0x42, 0x3c, 0x00},
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{0x00, 0x08, 0x18, 0x28, 0x48, 0x7e, 0x08, 0x00},
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{0x00, 0x7e, 0x40, 0x7c, 0x02, 0x42, 0x3c, 0x00},
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{0x00, 0x3c, 0x40, 0x7c, 0x42, 0x42, 0x3c, 0x00},
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{0x00, 0x7e, 0x02, 0x04, 0x08, 0x10, 0x10, 0x00},
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{0x00, 0x3c, 0x42, 0x3c, 0x42, 0x42, 0x3c, 0x00},
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{0x00, 0x3c, 0x42, 0x42, 0x3e, 0x02, 0x3c, 0x00},
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{0x00, 0x3c, 0x42, 0x42, 0x7e, 0x42, 0x42, 0x00},
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{0x00, 0x7c, 0x42, 0x7c, 0x42, 0x42, 0x7c, 0x00},
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{0x00, 0x3c, 0x42, 0x40, 0x40, 0x42, 0x3c, 0x00},
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{0x00, 0x78, 0x44, 0x42, 0x42, 0x44, 0x78, 0x00},
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{0x00, 0x7e, 0x40, 0x7c, 0x40, 0x40, 0x7e, 0x00},
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{0x00, 0x7e, 0x40, 0x40, 0x7c, 0x40, 0x40, 0x00}};
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static SDL_Window *gWindow;
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static SDL_Renderer *gRenderer;
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static SDL_Texture *gTexture;
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static Uint32 *pixels;
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static Screen screen;
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static Device *devscreen, *devmouse, *devkey, *devctrl;
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#pragma mark - Helpers
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int
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clamp(int val, int min, int max)
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{
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return (val >= min) ? (val <= max) ? val : max : min;
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}
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#pragma mark - Paint
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void
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paintpixel(Uint8 *dst, Uint16 x, Uint16 y, Uint8 color)
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{
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Uint16 row = (y % 8) + ((x / 8 + y / 8 * HOR) * 16), col = 7 - (x % 8);
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if(x >= HOR * 8 || y >= VER * 8 || row > RES - 8)
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return;
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if(color == 0 || color == 2)
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dst[row] &= ~(1UL << col);
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else
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dst[row] |= 1UL << col;
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if(color == 0 || color == 1)
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dst[row + 8] &= ~(1UL << col);
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else
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dst[row + 8] |= 1UL << col;
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}
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void
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paintchr(Uint8 *dst, Uint16 x, Uint16 y, Uint8 *sprite)
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{
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Uint16 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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Uint8 ch1 = ((sprite[v] >> (7 - h)) & 0x1);
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Uint8 ch2 = (((sprite[v + 8] >> (7 - h)) & 0x1) << 1);
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paintpixel(dst, x + h, y + v, ch1 + ch2);
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}
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}
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void
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painticn(Uint8 *dst, Uint16 x, Uint16 y, Uint8 *sprite, Uint8 blend)
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{
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Uint16 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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Uint8 ch1 = ((sprite[v] >> (7 - h)) & 0x1);
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if(ch1 == 0 && (blend == 0x05 || blend == 0x0a || blend == 0x0f))
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continue;
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paintpixel(dst, x + h, y + v, ch1 ? blend % 4 : blend / 4);
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}
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}
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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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drawpixel(Uint32 *dst, Uint16 x, Uint16 y, Uint8 color)
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{
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if(x >= screen.bounds.x1 && x <= screen.bounds.x2 && y >= screen.bounds.x1 && y <= screen.bounds.y2)
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dst[y * WIDTH + x] = theme[color];
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}
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void
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drawchr(Uint32 *dst, Uint16 x, Uint16 y, Uint8 *sprite, Uint8 alpha)
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{
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Uint8 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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Uint8 ch1 = ((sprite[v] >> h) & 0x1);
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Uint8 ch2 = (((sprite[v + 8] >> h) & 0x1) << 1);
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if(!alpha || (alpha && ch1 + ch2 != 0))
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drawpixel(dst, x + 7 - h, y + v, ch1 + ch2);
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}
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}
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void
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drawicn(Uint32 *dst, Uint16 x, Uint16 y, Uint8 *sprite, Uint8 fg, Uint8 bg)
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{
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Uint8 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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Uint8 ch1 = (sprite[v] >> (7 - h)) & 0x1;
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drawpixel(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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loadtheme(Uint8 *addr)
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{
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Uint8 r, g, b;
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r = *(addr + 0) >> 4 & 0xf, g = *(addr + 2) >> 4 & 0xf, b = *(addr + 4) >> 4 & 0xf;
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theme[0] = ((r + (r << 4)) << 16) + ((g + (g << 4)) << 8) + (b + (b << 4));
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r = *(addr + 0) & 0xf, g = *(addr + 2) & 0xf, b = *(addr + 4) & 0xf;
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theme[1] = ((r + (r << 4)) << 16) + ((g + (g << 4)) << 8) + (b + (b << 4));
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r = *(addr + 1) >> 4 & 0xf, g = *(addr + 3) >> 4 & 0xf, b = *(addr + 5) >> 4 & 0xf;
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theme[2] = ((r + (r << 4)) << 16) + ((g + (g << 4)) << 8) + (b + (b << 4));
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r = *(addr + 1) & 0xf, g = *(addr + 3) & 0xf, b = *(addr + 5) & 0xf;
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theme[3] = ((r + (r << 4)) << 16) + ((g + (g << 4)) << 8) + (b + (b << 4));
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screen.reqdraw = 1;
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}
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void
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drawdebugger(Uint32 *dst, Uxn *u)
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{
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Uint8 i, x, y, b;
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for(i = 0; i < 0x10; ++i) { /* memory */
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x = ((i % 8) * 3 + 3) * 8, y = screen.bounds.x1 + 8 + i / 8 * 8, b = u->wst.dat[i];
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drawicn(dst, x, y, icons[(b >> 4) & 0xf], 1 + (u->wst.ptr == i), 0);
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drawicn(dst, x + 8, y, icons[b & 0xf], 1 + (u->wst.ptr == i), 0);
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}
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for(x = 0; x < 32; ++x) {
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drawpixel(dst, x, HEIGHT / 2, 2);
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drawpixel(dst, WIDTH - x, HEIGHT / 2, 2);
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drawpixel(dst, WIDTH / 2, HEIGHT - x, 2);
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drawpixel(dst, WIDTH / 2, x, 2);
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drawpixel(dst, WIDTH / 2 - 16 + x, HEIGHT / 2, 2);
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drawpixel(dst, WIDTH / 2, HEIGHT / 2 - 16 + x, 2);
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}
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}
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void
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redraw(Uint32 *dst, Uxn *u)
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{
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Uint16 x, y;
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for(y = 0; y < VER; ++y)
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for(x = 0; x < HOR; ++x) {
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Uint16 key = (y * HOR + x) * 16;
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drawchr(dst, (x + PAD) * 8, (y + PAD) * 8, &screen.bg[key], 0);
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drawchr(dst, (x + PAD) * 8, (y + PAD) * 8, &screen.fg[key], 1);
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}
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if(GUIDES)
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drawdebugger(dst, u);
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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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screen.reqdraw = 0;
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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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SDL_StartTextInput();
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SDL_ShowCursor(SDL_DISABLE);
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screen.bounds.x1 = PAD * 8;
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screen.bounds.x2 = WIDTH - PAD * 8 - 1;
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screen.bounds.y1 = PAD * 8;
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screen.bounds.y2 = HEIGHT - PAD * 8 - 1;
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return 1;
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}
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void
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domouse(Uxn *u, SDL_Event *event)
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{
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Uint8 flag = 0x00;
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Uint16 addr = devmouse->addr;
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Uint16 x = clamp(event->motion.x / ZOOM - PAD * 8, 0, HOR * 8 - 1);
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Uint16 y = clamp(event->motion.y / ZOOM - PAD * 8, 0, VER * 8 - 1);
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u->ram.dat[addr + 0] = (x >> 8) & 0xff;
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u->ram.dat[addr + 1] = x & 0xff;
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u->ram.dat[addr + 2] = (y >> 8) & 0xff;
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u->ram.dat[addr + 3] = y & 0xff;
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u->ram.dat[addr + 5] = 0x00;
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switch(event->button.button) {
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case SDL_BUTTON_LEFT: flag = 0x01; break;
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case SDL_BUTTON_RIGHT: flag = 0x10; break;
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}
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switch(event->type) {
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case SDL_MOUSEBUTTONUP:
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setflag(&u->ram.dat[addr + 4], flag, 0);
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break;
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case SDL_MOUSEBUTTONDOWN:
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setflag(&u->ram.dat[addr + 4], flag, 1);
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if(flag == 0x10 && getflag(&u->ram.dat[addr + 4], 0x01))
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u->ram.dat[addr + 5] = 0x01;
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if(flag == 0x01 && getflag(&u->ram.dat[addr + 4], 0x10))
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u->ram.dat[addr + 5] = 0x10;
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break;
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}
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}
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void
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dotext(Uxn *u, SDL_Event *event)
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{
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int i;
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Uint16 addr = devkey->addr;
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if(SDL_GetModState() & KMOD_LCTRL || SDL_GetModState() & KMOD_RCTRL)
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return;
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for(i = 0; i < SDL_TEXTINPUTEVENT_TEXT_SIZE; ++i) {
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char c = event->text.text[i];
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if(c < ' ' || c > '~')
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break;
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u->ram.dat[addr] = c;
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}
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}
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void
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doctrl(Uxn *u, SDL_Event *event, int z)
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{
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Uint8 flag = 0x00;
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Uint16 addr = devctrl->addr;
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if(z && event->key.keysym.sym == SDLK_h && SDL_GetModState() & KMOD_LCTRL) {
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GUIDES = !GUIDES;
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redraw(pixels, u);
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}
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switch(event->key.keysym.sym) {
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case SDLK_LCTRL: flag = 0x01; break;
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case SDLK_LALT: flag = 0x02; break;
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case SDLK_BACKSPACE:
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flag = 0x04;
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if(z) u->ram.dat[devkey->addr] = 0x08;
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break;
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case SDLK_RETURN:
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flag = 0x08;
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if(z) u->ram.dat[devkey->addr] = 0x0d;
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break;
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case SDLK_UP: flag = 0x10; break;
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case SDLK_DOWN: flag = 0x20; break;
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case SDLK_LEFT: flag = 0x40; break;
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case SDLK_RIGHT: flag = 0x80; break;
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}
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setflag(&u->ram.dat[addr], flag, z);
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}
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#pragma mark - Devices
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Uint8
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console_poke(Uint8 *m, Uint16 ptr, Uint8 b0, Uint8 b1)
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{
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switch(b0) {
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case 0x08: printf("%c", b1); break;
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case 0x09: printf("0x%02x\n", b1); break;
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case 0x0b: printf("0x%04x\n", (m[ptr + 0x0a] << 8) + b1); break;
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}
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fflush(stdout);
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(void)m;
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(void)ptr;
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(void)b0;
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return b1;
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}
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Uint8
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screen_poke(Uint8 *m, Uint16 ptr, Uint8 b0, Uint8 b1)
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{
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ptr += 8;
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if(b0 == 0x0c) {
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Uint16 x = (m[ptr] << 8) + m[ptr + 1];
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Uint16 y = (m[ptr + 2] << 8) + m[ptr + 3];
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paintpixel(b1 >> 4 & 0xf ? screen.fg : screen.bg, x, y, b1 & 0xf);
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screen.reqdraw = 1;
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}
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return b1;
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}
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Uint8
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sprite_poke(Uint8 *m, Uint16 ptr, Uint8 b0, Uint8 b1)
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{
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ptr += 8;
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if(b0 == 0x0e) {
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Uint16 x = (m[ptr] << 8) + m[ptr + 1];
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Uint16 y = (m[ptr + 2] << 8) + m[ptr + 3];
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Uint16 a = (m[ptr + 4] << 8) + m[ptr + 5];
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Uint8 source = (b1 >> 4) & 0xf;
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Uint8 *layer = source % 2 ? screen.fg : screen.bg;
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if(source / 2)
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paintchr(layer, x, y, &m[a]);
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else
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painticn(layer, x, y, &m[a], b1 & 0xf);
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screen.reqdraw = 1;
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}
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return b1;
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}
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Uint8
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file_poke(Uint8 *m, Uint16 ptr, Uint8 b0, Uint8 b1)
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{
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char *name = (char *)&m[(m[ptr + 8] << 8) + m[ptr + 8 + 1]];
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Uint16 length = (m[ptr + 8 + 2] << 8) + m[ptr + 8 + 3];
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if(b0 == 0x0d) {
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Uint16 addr = (m[ptr + 8 + 4] << 8) + b1;
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FILE *f = fopen(name, "r");
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if(f && fread(&m[addr], length, 1, f)) {
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fclose(f);
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printf("Loaded %d bytes, at %04x from %s\n", length, addr, name);
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}
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} else if(b0 == 0x0f) {
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Uint16 addr = (m[ptr + 8 + 6] << 8) + b1;
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FILE *f = fopen(name, "w");
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if(fwrite(&m[addr], length, 1, f)) {
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fclose(f);
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printf("Saved %d bytes, at %04x from %s\n", length, addr, name);
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}
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}
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return b1;
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}
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Uint8
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system_poke(Uint8 *m, Uint16 ptr, Uint8 b0, Uint8 b1)
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{
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loadtheme(&m[0xfff8]);
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(void)ptr;
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(void)b0;
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return b1;
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}
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Uint8
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ppnil(Uint8 *m, Uint16 ptr, Uint8 b0, Uint8 b1)
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{
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(void)m;
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(void)ptr;
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(void)b0;
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return b1;
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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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loadtheme(u->ram.dat + 0xfff8);
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if(screen.reqdraw)
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redraw(pixels, 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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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:
|
|
case SDL_MOUSEBUTTONDOWN:
|
|
case SDL_MOUSEMOTION: domouse(u, &event); break;
|
|
case SDL_TEXTINPUT: dotext(u, &event); break;
|
|
case SDL_KEYDOWN: doctrl(u, &event, 1); break;
|
|
case SDL_KEYUP: doctrl(u, &event, 0); break;
|
|
case SDL_WINDOWEVENT:
|
|
if(event.window.event == SDL_WINDOWEVENT_EXPOSED)
|
|
redraw(pixels, u);
|
|
break;
|
|
}
|
|
}
|
|
evaluxn(u, u->vframe);
|
|
if(screen.reqdraw)
|
|
redraw(pixels, u);
|
|
}
|
|
}
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
Uxn u;
|
|
|
|
if(argc < 2)
|
|
return error("Input", "Missing");
|
|
if(!bootuxn(&u))
|
|
return error("Boot", "Failed");
|
|
if(!loaduxn(&u, argv[1]))
|
|
return error("Load", "Failed");
|
|
if(!init())
|
|
return error("Init", "Failed");
|
|
|
|
portuxn(&u, "console", console_poke);
|
|
devscreen = portuxn(&u, "screen", screen_poke);
|
|
portuxn(&u, "sprite", sprite_poke);
|
|
devctrl = portuxn(&u, "controller", ppnil);
|
|
devkey = portuxn(&u, "key", ppnil);
|
|
devmouse = portuxn(&u, "mouse", ppnil);
|
|
portuxn(&u, "file", file_poke);
|
|
portuxn(&u, "empty", ppnil);
|
|
portuxn(&u, "empty", ppnil);
|
|
portuxn(&u, "empty", ppnil);
|
|
portuxn(&u, "empty", ppnil);
|
|
portuxn(&u, "empty", ppnil);
|
|
portuxn(&u, "empty", ppnil);
|
|
portuxn(&u, "empty", ppnil);
|
|
portuxn(&u, "empty", ppnil);
|
|
portuxn(&u, "system", system_poke);
|
|
|
|
/* Write screen size to dev/screen */
|
|
u.ram.dat[devscreen->addr + 0] = (HOR * 8 >> 8) & 0xff;
|
|
u.ram.dat[devscreen->addr + 1] = HOR * 8 & 0xff;
|
|
u.ram.dat[devscreen->addr + 2] = (VER * 8 >> 8) & 0xff;
|
|
u.ram.dat[devscreen->addr + 3] = VER * 8 & 0xff;
|
|
|
|
start(&u);
|
|
quit();
|
|
return 0;
|
|
}
|