Re: [PyOpenGL-Users] [SOLVED] glDrawArrays and PyOpenGL 3.0.0a6 anything changed?

[V. A. S. <so...@es...>]

Hello,

Thank you for your continued PyOpenGL development and support. It is really 
great.

At 22:36 08/10/2007 -0400, Mike C. Fletcher wrote:
>I'm using glReadPixelsub in the readpixelleak test in OpenGLContext and 
>the result is coming back as a uint8 array there.  Sorry to be a pain, but 
>have you got a bit of code where I could see the failure


Just adding the code below to the previously submitted file illustrates the 
problem. I send the file as attachment but it is just to avoid problems 
because it is the same file as before. (Just click on the displayed widget)

     def mousePressEvent(self, event):
         self.lastPos = qt.QPoint(event.pos())
         #get the color
         x = self.lastPos.x()
         y = self.lastPos.y()
         y = self.height()- y
         self.makeCurrent()
         color = GL.glReadPixelsub(x, y, 1, 1, GL.GL_RGBA)
         #workaround a PyOpenGL bug
         if color.dtype == 'int8':
             print "WARNING: int8 received"
             color = color.astype(numpy.uint8)
         else:
             print "received %s" % color.dtype
         print "Color = ", color

(Well, actually is not needed to use that PyQt specific approach,  just 
adding the lines below to the end of the paintGL method is enough):

         color = GL.glReadPixelsub(0, 0, 1, 1, GL.GL_RGBA)
         if color.dtype == 'int8':
             print "WARNING: int8 received"


>(it's pretty easy to fire up pdb and trace through the wrappers to see 
>where something goes wrong with the 3.x version)

After all your effort to convert PyOpenGL to ctypes I guess I will have to 
learn to use pdb  ... :)

Best regards,

Armando