diff options
| -rw-r--r-- | main.c | 42 |
1 files changed, 27 insertions, 15 deletions
@@ -15,6 +15,7 @@ #include <stdio.h> #include <stdlib.h> +#include <unistd.h> #include <SDL2/SDL.h> #include "chip8.h" @@ -28,7 +29,8 @@ * https://slack-files.com/T3CH37TNX-F3RKEUKL4-b05ab4930d?nojsmode=1 */ -//#define VIDEO_SCALE 5 +#define DEFAULT_VIDEO_SCALE 10 +#define DEFAULT_FPS 500 SDL_Window *window; SDL_Renderer *renderer; @@ -45,8 +47,10 @@ void handle_key_up(int keycode); uint8_t get_chip8_key(int keycode); void print_registers(); -int VIDEO_SCALE = 5; +int video_scale = DEFAULT_VIDEO_SCALE; +int fps = DEFAULT_FPS; int step_cycle = 0; +char *rom = NULL; extern uint32_t video[WIDTH*HEIGHT]; extern int draw_flag; @@ -60,12 +64,6 @@ extern uint8_t sound_timer; extern uint16_t stack[STACK_SIZE]; void -usage(char *program) -{ - printf("usage: %s [scale] [speed] [romfile]\nscale - pixel scaling (~5 recommended)\nspeed - how many cycles per second should be run (60-1000 or so, depends on the game)\n", program); -} - -void quit() { SDL_DestroyTexture(texture); @@ -78,7 +76,7 @@ void init_video() { SDL_Init(SDL_INIT_VIDEO); - window = SDL_CreateWindow("chip8 interpreter", 0, 0, WIDTH*VIDEO_SCALE, HEIGHT*VIDEO_SCALE, SDL_WINDOW_SHOWN); + window = SDL_CreateWindow("chip8 interpreter", 0, 0, WIDTH*video_scale, HEIGHT*video_scale, SDL_WINDOW_SHOWN); renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED); texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA32, SDL_TEXTUREACCESS_STREAMING, WIDTH, HEIGHT); } @@ -204,17 +202,32 @@ handle_sdl_events() int main(int argc, char *argv[]) { - if (argc < 4) + char opt; + int index; + + while ((opt = getopt(argc, argv, "s:f:")) != -1) { - usage(argv[0]); - exit(EXIT_FAILURE); + switch (opt) + { + case 's': + video_scale = atoi(optarg); + break; + case 'f': + fps = atoi(optarg); + break; + default: break; + } + } + + for (index = optind; index < argc; index++) + { + rom = argv[index]; } - VIDEO_SCALE = atoi(argv[1]); chip8_init(); - if (!load_rom(argv[3])) + if (!load_rom(rom)) { fprintf(stderr, "cannot start interpreter\n"); exit(EXIT_FAILURE); @@ -222,7 +235,6 @@ int main(int argc, char *argv[]) init_video(); - const int fps = atoi(argv[2]); const uint32_t frame_delay = 1000/fps; uint32_t frame_start; uint32_t frame_time; |