1 files changed, 16 insertions, 0 deletions
diff --git a/lib/base.cc b/lib/base.cc
index 49e883e..5282617 100644
--- a/lib/base.cc
+++ b/lib/base.cc
@@ -78,3 +78,19 @@ void mogltk::base::Leave2DMode() {
 bool mogltk::base::is2D() {
     return true;
 }
+
+void mogltk::base::changeviewport(int x, int y, unsigned int w, unsigned int h) {
+    SDL_Rect r;
+
+    if ((w == 0) && (h == 0)) {
+	w = GetWidth() - x;
+	h = GetHeight() - y;
+    }
+
+    r.x = x;
+    r.y = y;
+    r.w = w;
+    r.h = h;
+
+    SDL_SetClipRect(surface, &r);
+}