1.1 --- a/src/opt.cc	Mon Dec 29 15:59:55 2014 +0200
     1.2 +++ b/src/opt.cc	Tue Dec 30 06:22:54 2014 +0200
     1.3 @@ -16,6 +16,8 @@
     1.4  {
     1.5  	opt.fname = 0;
     1.6  	opt.rend_type = REND_FAST;
     1.7 +	opt.xsz = 800;
     1.8 +	opt.ysz = 800;
     1.9  }
    1.10  
    1.11  static RendererType renderer_type(const char *name)
    1.12 @@ -36,6 +38,13 @@
    1.13  		if(argv[i][0] == '-') {
    1.14  			if(argv[i][2] == 0) {
    1.15  				switch(argv[i][1]) {
    1.16 +				case 's':
    1.17 +					if(sscanf(argv[++i], "%dx%d", &opt.xsz, &opt.ysz) != 2) {
    1.18 +						fprintf(stderr, "-s must be followed by the window size (WxH)\n");
    1.19 +						return -1;
    1.20 +					}
    1.21 +					break;
    1.22 +
    1.23  				case 'r':
    1.24  					if((opt.rend_type = renderer_type(argv[++i])) == REND_NONE) {
    1.25  						if(strcmp(argv[i], "help") == 0) {