+ srand(time(NULL));
+
+ enum {OUTPUT_TO_BMP, LOOP} mode = LOOP;
+
+
+ Colour c(0,0,0,1);
+ const char * input_bmp = NULL;
+ const char * output_bmp = NULL;
+ const char * input_filename = NULL;
+ float b[4] = {0,0,1,1};
+
+ int i = 0;
+ while (++i < argc)
+ {
+ if (argv[i][0] != '-')
+ {
+ input_filename = argv[i];
+ continue;
+ }
+ switch (argv[i][1])
+ {
+ case 'o':
+ mode = OUTPUT_TO_BMP;
+ if (++i >= argc)
+ Fatal("No input argument following -o switch");
+ input_bmp = argv[i];
+ if (++i >= argc)
+ Fatal("No output argument following -o switch");
+ output_bmp = argv[i];
+
+ break;
+ case 'c':
+ {
+ Debug("Reading paint colour");
+ for (int j = 1; j <= 4; ++j)
+ {
+ if (i+j >= argc)
+ Fatal("No %d colour component following -c switch", j);
+ char * e;
+ float * comp = (j == 1) ? (&c.r) : ((j == 2) ? (&c.g) : ((j == 3) ? (&c.b) : &(c.a)));
+ *comp = strtof(argv[i+j], &e);
+ if (*e != '\0')
+ Fatal("Colour component %d not a valid float", j);
+ }
+ i += 4;
+ break;
+ }
+ case 'b':
+ {
+ Debug("Reading view bounds");
+ for (int j = 1; j <= 4; ++j)
+ {
+ if (i+j >= argc)
+ Fatal("No %d bounds component following -b switch", j);
+ char * e;
+ b[j-1] = strtof(argv[i+j], &e);
+ if (*e != '\0')
+ Fatal("Bounds component %d not a valid float", j);
+ }
+ i += 4;
+ break;
+ }
+ }
+ }