1GL_EXT_texture_array
2http://developer.download.nvidia.com/opengl/specs/GL_EXT_texture_array.txt
3GL_EXT_texture_array
4	GL_TEXTURE_1D_ARRAY_EXT 0x8C18
5	GL_PROXY_TEXTURE_1D_ARRAY_EXT 0x8C19
6	GL_TEXTURE_2D_ARRAY_EXT 0x8C1A
7	GL_PROXY_TEXTURE_2D_ARRAY_EXT 0x8C1B
8	GL_TEXTURE_BINDING_1D_ARRAY_EXT 0x8C1C
9	GL_TEXTURE_BINDING_2D_ARRAY_EXT 0x8C1D
10	GL_MAX_ARRAY_TEXTURE_LAYERS_EXT 0x88FF
11	GL_COMPARE_REF_DEPTH_TO_TEXTURE_EXT 0x884E
12	void glFramebufferTextureLayerEXT (GLenum target, GLenum attachment, GLuint texture, GLint level, GLint layer)
13