[ pyopengl-Bugs-2829309 ] glCallLists calls lists twice

Bugs item #2829309, was opened at 2009-07-30 01:02
Message generated for change (Comment added) made by lethalman
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Category: GL
Group: v3.0.0
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Luca Bruno (lethalman)
Assigned to: Mike C. Fletcher (mcfletch)
Summary: glCallLists calls lists twice

Initial Comment:
Hello,
I'm using pyopengl 3.0.0~c1 from debian and mesa 7.6 from git. I'm almost pretty sure that glCallLists ([1]) calls the list 1 twice, so it happens for more than one list. Reproduce as follows:
1. glRenderMode(GL_SELECT)
2. ... glCallLists([1])
3. glRenderMode(GL_RENDER)
If the list 1 pushed only one name, you get two hits. This doesn't happen if you glCallList(1), you only get one hit as expected. I'm currently doing (glCallList(list) for list in lists) instead of glCallLists as temporarly workaround. I don't know if this happens with C++ directly, couldn't test so I've reported it here.

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>Comment By: Luca Bruno (lethalman)
Date: 2009-07-30 07:41

Message:
I rectify, it happens with GL_COMPILE_AND_EXECUTE (not necessary other
lists) and glCallLists must be in a list to call other lists:

        glMatrixMode(GL_PROJECTION)
        glLoadIdentity() 
        gluPerspective(40.0, 1.0, 1.0, 10.0)  
        glTranslatef (0, 0, -3)

        glMatrixMode (GL_MODELVIEW)
        glLoadIdentity ()
        glNewList(1, GL_COMPILE_AND_EXECUTE)
        glInitNames ()
        glCallLists([2]) # replace with gCallList(2)
        glEndList ()
        
        glNewList(2, GL_COMPILE)
        glPushName (1)
        glBegin (GL_POINTS)
        glVertex3f (0, 0, 0)
        glEnd ()
        glPopName ()
        glEndList ()

        glSelectBuffer (100)
        glRenderMode (GL_SELECT)
        glCallList(1)
        print glRenderMode (GL_RENDER)


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Comment By: Mike C. Fletcher (mcfletch)
Date: 2009-07-30 06:53

Message:
I can't replicate this failure condition.  I am using this code, on an
Ubuntu 3.0.1 Jaunty Linux Box with current BZR head of PyOpenGL:

	def test_glCallLists_twice( self ):
		"""SF#2829309 report that glCallLists doubles operation"""
		l = glGenLists(1)
		try:
			glEnd()
		except error.GLerror, err:
			pass
		glSelectBuffer( 23 )
		glRenderMode( GL_SELECT )
		glNewList( l, GL_COMPILE )
		glPushName( 222 )
		glEndList()
		depth = glGetIntegerv( GL_NAME_STACK_DEPTH )
		assert depth == (0,), depth # shouldn't have added in compile mode 
		glCallLists( [l] )
		depth = glGetIntegerv( GL_NAME_STACK_DEPTH )
		assert depth == (1,), depth # should have a single record
		glCallLists( [l] )
		depth = glGetIntegerv( GL_NAME_STACK_DEPTH )
		assert depth == (2,), depth # should have a second (identical) record
		glPopName()
		glPopName()
		glRenderMode( GL_RENDER )

which test passes.  Please provide a test that fails on your platform so I
can test whether we're looking at a bug that was fixed in the meantime or
an error in usage or a subtle corner case.

----------------------------------------------------------------------

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