added viewport variants

src/glow/common/scoped_gl.hh

@@ -8,6 +8,9 @@
 #include <glow/gl.hh>
 
 #include <typed-geometry/types/color.hh>
+#include <typed-geometry/types/objects/aabb.hh>
+#include <typed-geometry/types/pos.hh>
+#include <typed-geometry/types/size.hh>
 
 #include <initializer_list>
 
@@ -384,6 +387,14 @@ struct viewport
 
     GLint prevView[4];
 
+    viewport(tg::iaabb2 bounds_inclusive)
+      : viewport(bounds_inclusive.min.x,
+                 bounds_inclusive.min.y,
+                 bounds_inclusive.max.x - bounds_inclusive.min.x + 1,
+                 bounds_inclusive.max.y - bounds_inclusive.min.y + 1)
+    {
+    }
+    viewport(tg::ipos2 offset, tg::isize2 size) : viewport(offset.x, offset.y, size.width, size.height) {}
     viewport(int x, int y, int w, int h)
     {
         glGetIntegerv(GL_VIEWPORT, prevView);