From 03730cb0204526f0d846659d18cd916704de83f7 Mon Sep 17 00:00:00 2001
From: Mathieu Virbel <mat@kivy.org>
Date: Thu, 8 Dec 2011 12:07:41 +0100
Subject: [PATCH] graphics: emit a warning when a quad have not enough point in
 the list (instead of having an exception during build()

---
 kivy/graphics/vertex_instructions.pyx | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/kivy/graphics/vertex_instructions.pyx b/kivy/graphics/vertex_instructions.pyx
index a4ad1e078..f83331f68 100644
--- a/kivy/graphics/vertex_instructions.pyx
+++ b/kivy/graphics/vertex_instructions.pyx
@@ -723,6 +723,10 @@ cdef class Quad(VertexInstruction):
             return self._points
         def __set__(self, points):
             self._points = list(points)
+            if len(self._points) != 8:
+                raise GraphicException(
+                    'Quad: invalid number of points (%d instead of 8' % len(
+                    self._points)))
             self.flag_update()