Find texture size in PyOpenGL

Question

I'm making a simple 2D game for a University class with Pygame (used just for handling events) and PyOpenGL (for the graphics). I need to find the dimensions of a texture I've loaded given its textureID, but I can't figure out how to use the PyOpenGL API for this.

I know that the function I should use is glGetTextureLevelParameteriv, which receives as arguments:

• the ID of the texture

• the mipmap level (0 in my case)

• the texture's parameter I want to know (for me either GL_TEXTURE_WIDTH or GL_TEXTURE_HEIGHT)

• a "mistery" argument params which is described by the PyOpenGL docs as "Returns the requested data."

My problem is with the latter argument, since in "pure" C++ OpenGL that would be a GLint* pointer to a variable passed by reference and used to write the returned value. However, since I'm using python passing by reference isn't really a thing and I can't figure out what to use as a fourth argument to make the function work.

The code right now is:

h = [0.0]
glGetTextureLevelParameteriv(self.texture, 0, GL_TEXTURE_HEIGHT, h) # self.texture is the texture's ID
print(h) # prints "[0.0]"

I'm 100% sure the texture is loaded correctly. I'd like to not store the texture's size nor to define a new internal datatype to do so.

Relevant docs:

• PyOpenGL

• Khronos's OpenGL docs