-#define __glTexImage3D_size(format, type, width, height, depth) __gl_image_size(format, type, width, height, depth, can_unpack_subimage())
-#define __glTexImage2D_size(format, type, width, height) __gl_image_size(format, type, width, height, 1, can_unpack_subimage())
-#define __glTexImage1D_size(format, type, width) __gl_image_size(format, type, width, 1, 1, can_unpack_subimage())
-
-#define __glTexSubImage3D_size(format, type, width, height, depth) __glTexImage3D_size(format, type, width, height, depth)
-#define __glTexSubImage2D_size(format, type, width, height) __glTexImage2D_size(format, type, width, height)
-#define __glTexSubImage1D_size(format, type, width) __glTexImage1D_size(format, type, width)
-
-#define __glTexImage3DEXT_size __glTexImage3D_size
-#define __glTexImage2DEXT_size __glTexImage2D_size
-#define __glTexImage1DEXT_size __glTexImage1D_size
-#define __glTexSubImage3DEXT_size __glTexSubImage3D_size
-#define __glTexSubImage2DEXT_size __glTexSubImage2D_size
-#define __glTexSubImage1DEXT_size __glTexSubImage1D_size
-
-#define __glTextureImage3DEXT_size __glTexImage3D_size
-#define __glTextureImage2DEXT_size __glTexImage2D_size
-#define __glTextureImage1DEXT_size __glTexImage1D_size
-#define __glTextureSubImage3DEXT_size __glTexSubImage3D_size
-#define __glTextureSubImage2DEXT_size __glTexSubImage2D_size
-#define __glTextureSubImage1DEXT_size __glTexSubImage1D_size
-
-#define __glMultiTexImage3DEXT_size __glTexImage3D_size
-#define __glMultiTexImage2DEXT_size __glTexImage2D_size
-#define __glMultiTexImage1DEXT_size __glTexImage1D_size
-#define __glMultiTexSubImage3DEXT_size __glTexSubImage3D_size
-#define __glMultiTexSubImage2DEXT_size __glTexSubImage2D_size
-#define __glMultiTexSubImage1DEXT_size __glTexSubImage1D_size
-
-#define __glDrawPixels_size(format, type, width, height) __glTexImage2D_size(format, type, width, height)
-#define __glConvolutionFilter1D_size(format, type, width) __glTexImage1D_size(format, type, width)
-#define __glConvolutionFilter2D_size(format, type, width, height) __glTexImage2D_size(format, type, width, height)
-#define __glColorTable_size(format, type, width) __glTexImage1D_size(format, type, width)
-#define __glColorSubTable_size(format, type, count) __glColorTable_size(format, type, count)
-
-#define __glBitmap_size(width, height) __glTexImage2D_size(GL_COLOR_INDEX, GL_BITMAP, width, height)
-#define __glPolygonStipple_size() __glBitmap_size(32, 32)
+#define _glTexImage3D_size(format, type, width, height, depth) _gl_image_size(format, type, width, height, depth, can_unpack_subimage())
+#define _glTexImage2D_size(format, type, width, height) _gl_image_size(format, type, width, height, 1, can_unpack_subimage())
+#define _glTexImage1D_size(format, type, width) _gl_image_size(format, type, width, 1, 1, can_unpack_subimage())
+
+#define _glTexSubImage3D_size(format, type, width, height, depth) _glTexImage3D_size(format, type, width, height, depth)
+#define _glTexSubImage2D_size(format, type, width, height) _glTexImage2D_size(format, type, width, height)
+#define _glTexSubImage1D_size(format, type, width) _glTexImage1D_size(format, type, width)
+
+#define _glTexImage3DEXT_size _glTexImage3D_size
+#define _glTexImage2DEXT_size _glTexImage2D_size
+#define _glTexImage1DEXT_size _glTexImage1D_size
+#define _glTexSubImage3DEXT_size _glTexSubImage3D_size
+#define _glTexSubImage2DEXT_size _glTexSubImage2D_size
+#define _glTexSubImage1DEXT_size _glTexSubImage1D_size
+
+#define _glTextureImage3DEXT_size _glTexImage3D_size
+#define _glTextureImage2DEXT_size _glTexImage2D_size
+#define _glTextureImage1DEXT_size _glTexImage1D_size
+#define _glTextureSubImage3DEXT_size _glTexSubImage3D_size
+#define _glTextureSubImage2DEXT_size _glTexSubImage2D_size
+#define _glTextureSubImage1DEXT_size _glTexSubImage1D_size
+
+#define _glMultiTexImage3DEXT_size _glTexImage3D_size
+#define _glMultiTexImage2DEXT_size _glTexImage2D_size
+#define _glMultiTexImage1DEXT_size _glTexImage1D_size
+#define _glMultiTexSubImage3DEXT_size _glTexSubImage3D_size
+#define _glMultiTexSubImage2DEXT_size _glTexSubImage2D_size
+#define _glMultiTexSubImage1DEXT_size _glTexSubImage1D_size
+
+#define _glDrawPixels_size(format, type, width, height) _glTexImage2D_size(format, type, width, height)
+#define _glConvolutionFilter1D_size(format, type, width) _glTexImage1D_size(format, type, width)
+#define _glConvolutionFilter2D_size(format, type, width, height) _glTexImage2D_size(format, type, width, height)
+#define _glColorTable_size(format, type, width) _glTexImage1D_size(format, type, width)
+#define _glColorSubTable_size(format, type, count) _glColorTable_size(format, type, count)
+
+#define _glBitmap_size(width, height) _glTexImage2D_size(GL_COLOR_INDEX, GL_BITMAP, width, height)
+#define _glPolygonStipple_size() _glBitmap_size(32, 32)