graphics: add instance() as a default context

windows: create default matrix projection

kivy/c_ext/graphics.pyx

@@ -204,6 +204,10 @@ cdef class Shader:
         else:
             Logger.debug('Shader compiled sucessfully')
     
+def Context_instance():
+    global _default_context
+    print 'get', _default_context
+    return _default_context
 
 cdef class GraphicContext:
     '''Handle the saving/restore of the context
@@ -224,6 +228,8 @@ cdef class GraphicContext:
                 self._default_shader = Shader(_default_vertex_shader, _default_fragment_shader)
             return self._default_shader
 
+    instance = staticmethod(Context_instance)
+
     def __cinit__(self):
         self.state = {}
         self.stack = []
@@ -393,6 +399,7 @@ cdef class Canvas:
     cdef list batch_slices
 
     def __cinit__(self):
+        global _default_context
         if _default_context == None:
             _default_context = GraphicContext()
         self._context = _default_context

kivy/core/window/__init__.py

@@ -304,6 +304,10 @@ class WindowBase(EventDispatcher):
     def update_viewport(self):
         # XXX FIXME
         from kivy.core.gl import *
+        from kivy.graphics import GraphicContext
+        from kivy.lib.transformations import clip_matrix
+        context = GraphicContext.instance()
+        context.set('projection_mat', clip_matrix(0, self.width, 0, self.height, -1, 1))
 
         width, height = self.system_size
         w2 = width / 2.
@@ -312,13 +316,9 @@ class WindowBase(EventDispatcher):
         # prepare the viewport
         glViewport(0, 0, width, height)
 
-        # set the projection
-        glMatrixMode(GL_PROJECTION)
-        glLoadIdentity()
-        glFrustum(-w2, w2, -h2, h2, .1, 1000)
-        glScalef(5000, 5000, 1)
-
         # use the rotated size.
+        # XXX FIXME fix rotation
+        '''
         width, height = self.size
         w2 = width / 2.
         h2 = height / 2.
@@ -330,6 +330,7 @@ class WindowBase(EventDispatcher):
         glTranslatef(w2, h2, 0)
         glRotatef(self._rotation, 0, 0, 1)
         glTranslatef(-w2, -h2, 0)
+        '''
 
         # update window size
         for w in self.children:

kivy/uix/widget.py

@@ -12,9 +12,8 @@ __all__ = ('Widget', )
 from kivy.weakmethod import WeakMethod
 from kivy.c_ext.event import EventDispatcher
 from kivy.c_ext.properties import *
-from kivy.base import EventLoop
-EventLoop.ensure_window()
 from kivy.graphics import Canvas
+from kivy.base import EventLoop
 
 class Widget(EventDispatcher):
     '''
@@ -64,6 +63,7 @@ class Widget(EventDispatcher):
         self.register_event_type('on_touch_up')
         self.register_event_type('on_draw')
 
+        EventLoop.ensure_window()
         self.canvas = Canvas()