- glViewport (0, 0, (GLint) width, (GLint) height);
+ int y = 0;
+
+ if (width > height * 5) { /* tiny window: show middle */
+ height = width*1.5;
+ y = -height*0.2;
+ h = height / (GLfloat) width;
+ }
+ glViewport (0, y, (GLint) width, (GLint) height);