diff options
| -rw-r--r-- | main.c | 43 |
1 files changed, 39 insertions, 4 deletions
@@ -313,15 +313,50 @@ void load_image(const char* path) FreeImage_Unload(image); } -void parse_arg(const char* arg) +void print_usage(const char* name) +{ + fprintf(stdout, + "Usage: %s [-ifsh] [images...]\n" + "\n" + "Flags:\n" + " -i: Read paths from stdin. One path per line.\n" + " -f: Start in fullscreen mode\n" + " -s: Auto scale images to fit window\n" + " -h: Print this help\n" + "\n" + "Mouse:\n" + " Click+Drag to Pan\n" + " MouseWheel to Zoom\n" + "\n" + "Hotkeys:\n" + " 'q': Quit\n" + " '[',LArrow: Previous image\n" + " ']',RArrow: Next image\n" + " 'i','+': Zoom in\n" + " 'o','=': Zoom out\n" + " 'h': Pan left\n" + " 'j': Pan down\n" + " 'k': Pan up\n" + " 'l': Pan right\n" + " 'r': Reset view\n" + " 's': Scale image to fit window\n" + " 'x': Close current image\n" + " 'f': Toggle fullscreen\n" + " ' ': Toggle gif playback\n" + " '.': Step a frame of gif playback\n" + ,name); +} + +void parse_arg(const char* name, const char* arg) { for(const char *o = arg; *o != 0; ++o) { switch(*o) { case 'f': g_options.fullscreen = 1; break; case 's': g_options.autoscale = 1; break; case 'i': g_options.stdin = 1; break; + case 'h': print_usage(name); exit(0); break; default: - fprintf(stderr, "Error: unknown argument '%c'. Aborting.\n", *o); + fprintf(stderr, "Unknown argument '%c'. Aborting.\n", *o); exit(1); } } @@ -330,13 +365,13 @@ void parse_arg(const char* arg) int main(int argc, char** argv) { if(argc < 2) { - fprintf(stderr, "Usage: %s <image_file> <...>\n", argv[0]); + print_usage(argv[0]); exit(1); } for(int i = 1; i < argc; ++i) { if(argv[i][0] == '-') { - parse_arg(&argv[i][1]); + parse_arg(argv[0], &argv[i][1]); } else { add_path(argv[i]); } |