X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=main.c;h=ed2377ea354f57c51ce5ff487be845d5d8b7499c;hb=75aa7ef609cbda625e6c19bc07acf744eb3bfc5a;hp=4b7ad18b78087d58d04ad764e60b5aa2a97a25d5;hpb=898a618bf25182f1e3b456303c3c2613c170856e;p=vidsys

diff --git a/main.c b/main.c
index 4b7ad18..ed2377e 100644
--- a/main.c
+++ b/main.c
@@ -8,13 +8,53 @@ void test8bpp(void);
 struct vid_modeinfo *vm;
 void *vmem;
 
+static const char *usage_fmt = "Usage %s: [options]\n"
+	"Options:      \n"
+	" -s <XxY>: video resolution\n"
+	" -b <bpp>: color depth\n";
+
 int main(int argc, char **argv)
 {
+	int i;
 	int mode;
 	int xres = 320;
 	int yres = 200;
 	int bpp = 8;
 
+	for(i=1; i<argc; i++) {
+		if(argv[i][0] == '-') {
+			if(argv[i][2]) {
+invalopt:		fprintf(stderr, "invalid option: %s\n", argv[i]);
+				return 1;
+			}
+			switch(argv[i][1]) {
+			case 's':
+				if(!argv[++i] || sscanf(argv[i], "%dx%d", &xres, &yres) != 2) {
+					fprintf(stderr, "invalid resolution: %s\n", argv[i]);
+					return 1;
+				}
+				break;
+
+			case 'b':
+				if(!argv[++i] || (bpp = atoi(argv[i])) <= 0) {
+					fprintf(stderr, "invalid color depth: %s\n", argv[i]);
+					return 1;
+				}
+
+			case 'h':
+				printf(usage_fmt, argv[0]);
+				return 0;
+
+			default:
+				goto invalopt;
+			}
+		} else {
+			fprintf(stderr, "unexpected argument: %s\n", argv[i]);
+			return 1;
+		}
+	}
+
+
 	if(vid_init() == -1) {
 		fprintf(stderr, "failed to initialize video\n");
 		return 1;