Hey guys,
I've been struggling with a few things with Pyglet and figured I'd
fire off an email to the list.
1. Is TGA file support broken? I tried loading a TGA file with
image.load on OSX 10.4 and ended up with the error:
Traceback (most recent call last):
File "LoadTGA.py", line 84, in <module>
main()
File "LoadTGA.py", line 77, in main
Render()
File "LoadTGA.py", line 51, in Render
m_tga.blit(250, 400, 0)
File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/pyglet/image/__init__.py",
line 708, in blit
self.texture.blit(x, y, z, width, height)
File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/pyglet/image/__init__.py",
line 1316, in blit
x + w, y, z, 1.,
TypeError: unsupported operand type(s) for +: 'int' and 'NoneType'
This is with pyglet 1.0. I haven't tried it with 1.1 as of yet. If I
convert the file to a png it works fine.
2. If I access the pixel data should I be able to pass it to a call
to glDrawPixels() instead of using the blit method? I realize this
doesn't make a ton of sense, but I'm trying to see what is and is not
possible w/ pyglet and OpenGL. I've been playing around with
glBitmap() which seems to work fine as long as you use ctypes to
construct a GLubyte array.
3. Is it possible to make calls to glGetIntegerv()? I ran into this
last night:
>>> x = GLint
>>> glGetIntegerv(GL_MAX_LIGHTS, x)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ctypes.ArgumentError: argument 2: <type 'exceptions.TypeError'>:
expected LP_c_long instance instead of _ctypes.SimpleType
I fiddled around with some other different variable types but never
managed to get it to return a useful value.
4. Is there a canonical way to parse the return value of
glGetString()? The ctypes manual mentions using libc strchr(), but
this isn't very cross platform. I cooked up something quickly using
chr() and exiting a while loop when I find a null character, but it
seems like there has to be a better (ie. more pythonic) way of doing
this. If I try to do this in a list comprehension it just segfaults
since it doesn't know when to stop on the null value.
Thanks,
--Patrick.
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