unify drawing routines and add clipped fb drawing support.

now changing the viewport offset will correctly show the
portion of the framebuffer that's visible, including
support for upscaled views.

1 files changed, 4 insertions, 0 deletions

diff --git a/camera.c b/camera.c
index e67601f..ccd1f57 100644
--- a/camera.c
+++ b/camera.c
@@ -114,6 +114,10 @@ Cam(Rectangle vr, Renderer *r, Projection p, double fov, double n, double f)
 
 	c = newcamera();
 	c->view = mkviewport(vr);
+	if(c->view == nil){
+		werrstr("mkviewport: %r");
+		return nil;
+	}
 	c->rctl = r;
 	configcamera(c, p, fov, n, f);
 	return c;