Support mipmapping

Author: einarf

demosys/opengl/texture.py

@@ -30,6 +30,13 @@ def __init__(self, name=None, path=None, width=0, height=0, depth=0, lod=0, targ
         self.mag_filter = mag_filter
         self.anisotropy = anisotropy
         self.mipmap = mipmap
+        # Force mipmaps if anisotropy is specified
+        if self.anisotropy > 0:
+            self.mipmap = True
+        # Ensure we are using the right interpolation modes
+        if self.mipmap:
+            self.min_filter = GL.GL_LINEAR_MIPMAP_LINEAR
+            self.mag_filter = GL.GL_LINEAR
         # For pre-loading files
         self.name = name
         self.path = path
@@ -99,6 +106,9 @@ def _build(self, data=None):
                 GL.glTexImage1D(self.target, self.lod, self.internal_format,
                                 self.height, 0, self.format, self.type, data)
 
+        if self.mipmap:
+            GL.glGenerateMipmap(self.target)
+
     def set_image(self, image):
         """
         Set pixel data using a image file with PIL/Pillow.