Make it easier to override resolution from Makefile

diff --git a/doomgeneric/doomgeneric.h b/doomgeneric/doomgeneric.h
index 091621f2ae075591ced0e923e4dc350007e81ff3..9ba1457074e72ff4ba41eb0cc069cd8fe9e7bc85 100644 (file)
--- a/doomgeneric/doomgeneric.h
+++ b/doomgeneric/doomgeneric.h
@@ -4,8 +4,13 @@
 #include <stdlib.h>
 #include <stdint.h>
 
+#ifndef DOOMGENERIC_RESX
 #define DOOMGENERIC_RESX 640
+#endif  // DOOMGENERIC_RESX
+
+#ifndef DOOMGENERIC_RESY
 #define DOOMGENERIC_RESY 400
+#endif  // DOOMGENERIC_RESY
 
 
 extern uint32_t* DG_ScreenBuffer;