from OpenGL.GL import *

class EmptyTexture2D:
    def __init__(self, wrap=GL_REPEAT, minFilter=GL_LINEAR, magFilter=GL_LINEAR):
        self.wrapS = wrap
        self.wrapT = wrap
        self.minFilter = minFilter
        self.magFilter = magFilter
        self.defined = False
        self.id = 0

    def define(self):
        self.id = glGenTextures(1)
        glBindTexture(GL_TEXTURE_2D, self.id)
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, self.wrapS)
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, self.wrapT)
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, self.minFilter)
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, self.magFilter)
        glBindTexture(GL_TEXTURE_2D, 0)
        self.defined = True

    def apply(self):
        if not self.defined:
            self.define()
        glBindTexture(GL_TEXTURE_2D, self.id)
        if self.id != 0:
            glEnable(GL_TEXTURE_2D)
        else:
            glDisable(GL_TEXTURE_2D)

    def disable(self):
        glBindTexture(GL_TEXTURE_2D, 0)
        glDisable(GL_TEXTURE_2D)