resource.py

try:
  import Image
except ImportError:
  import PIL.Image as Image
from OpenGL.GL import *

class TextureLoader(object):
  def __init__(self):
    self.cache = {}

  def load(self, fname):
    if self.cache.get(fname):
      return self.cache[fname]

    texture = self.cache[fname] = glGenTextures(1)
    image = Image.open(fname)

    ix = image.size[0]
    iy = image.size[1]
    image = image.tostring("raw", "RGBA", 0, -1)

    # Create Texture
    glBindTexture(GL_TEXTURE_2D, texture)   # 2d texture (x and y size)
    #glEnable(GL_TEXTURE_2D)

    glPixelStorei(GL_UNPACK_ALIGNMENT,1)
    glTexImage2D(GL_TEXTURE_2D, 0, 4, ix, iy, 1, GL_RGBA, GL_UNSIGNED_BYTE, image)
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP)
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP)
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST)
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST)
    glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL)

    return texture

texture = TextureLoader()