[PyOpenGL-Users] memory trouble with a very simple program

[Champ H. <cha...@be...>]

Hi,

When I run the following program (see below), the memory that is used
by my system (windows XP) as indicated by the task manager is
constantly increasing when I hide and show this PyOpenGL application
with another window (like the task manager for instance). Of course,
the memory increase is not huge (4 Ko at a time in general) but it
does not seem to reach an upper limit. Furthermore, I have the same
problem for another (more complex) application where I refresh the
window with new drawings : in this case the memory trouble gets really
problematic.

What am I doing wrong?

Thanks for your reply.

Bernard

#----------------------------------------------------------------------
from wxPython.wx        import *
from wxPython.glcanvas  import *
from OpenGL.GL          import *
from OpenGL.GLUT        import *

class MyCanvasBase(wxGLCanvas):
    def __init__(self, parent):
        wxGLCanvas.__init__(self, parent, -1)
        self.init = False
        EVT_ERASE_BACKGROUND(self, self.OnEraseBackground)
        EVT_SIZE(self, self.OnSize)
        EVT_PAINT(self, self.OnPaint)

    def OnEraseBackground(self, event):
        pass # Do nothing, to avoid flashing on MSW.

    def OnSize(self, event):
        size = self.GetClientSize()
        if self.GetContext():
            self.SetCurrent()
            glViewport(0, 0, size.width, size.height)

    def OnPaint(self, event):
        dc = wxPaintDC(self)
        self.SetCurrent()
        if not self.init:
            self.InitGL()
            self.init = True
        self.OnDraw()

class RectangleCanvas(MyCanvasBase):
    def InitGL(self):
        glMatrixMode(GL_PROJECTION);
        glFrustum(-0.5, 0.5, -0.5, 0.5, 1.0, 3.0);
        glMatrixMode(GL_MODELVIEW);
        glTranslatef(0.0, 0.0, -2.0);

    def OnDraw(self):
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
        glColor3f(0.0,0.0,1.0)
        glRectf(-0.5,-0.5,0.5,0.5)

        self.SwapBuffers()

#----------------------------------------------------------------------

def _test():
    class MyApp(wxApp):
        def OnInit(self):
            frame = wxFrame(None, -1, "Test", wxDefaultPosition,
wxSize(600,300))
            win = RectangleCanvas(frame)
            frame.Show(True)
            ##self.SetTopWindow(frame)
            return True

    app = MyApp(0)
    app.MainLoop()

if __name__ == '__main__':
    _test()