From 57808f435718a1948da32e7d7c1f25d241c15186 Mon Sep 17 00:00:00 2001
From: Waldo Bronchart <wbronchart@gmail.com>
Date: Thu, 30 Aug 2012 23:50:12 +0200
Subject: [PATCH] Fixed bug with Camera widget in .kv file
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The resolution property is not initialized before _on_index() is called.
So the app crashes because [-1, -1] is not a supported resolution.

...
Camera:
    resolution: (640, 480)
    index: 0
---
 kivy/uix/camera.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kivy/uix/camera.py b/kivy/uix/camera.py
index 81eb5dfb9..c707a9cf1 100644
--- a/kivy/uix/camera.py
+++ b/kivy/uix/camera.py
@@ -96,6 +96,8 @@ class Camera(Image):
         self._camera = None
         if self.index < 0:
             return
+        if self.resolution[0] < 0 or self.resolution[1] < 0:
+            return
         self._camera = CoreCamera(index=self.index,
             resolution=self.resolution, stopped=True)
         self._camera.bind(on_load=self._camera_loaded)