GL_KHR_texture_compression_astc_ldr
http://www.opengl.org/registry/specs/KHR/texture_compression_astc_ldr.txt
GL_KHR_texture_compression_astc_ldr
	GL_COMPRESSED_RGBA_ASTC_4x4_KHR 0x93B0
	GL_COMPRESSED_RGBA_ASTC_5x4_KHR 0x93B1
	GL_COMPRESSED_RGBA_ASTC_5x5_KHR 0x93B2
	GL_COMPRESSED_RGBA_ASTC_6x5_KHR 0x93B3
	GL_COMPRESSED_RGBA_ASTC_6x6_KHR 0x93B4
	GL_COMPRESSED_RGBA_ASTC_8x5_KHR 0x93B5
	GL_COMPRESSED_RGBA_ASTC_8x6_KHR 0x93B6
	GL_COMPRESSED_RGBA_ASTC_8x8_KHR 0x93B7
	GL_COMPRESSED_RGBA_ASTC_10x5_KHR 0x93B8
	GL_COMPRESSED_RGBA_ASTC_10x6_KHR 0x93B9
	GL_COMPRESSED_RGBA_ASTC_10x8_KHR 0x93BA
	GL_COMPRESSED_RGBA_ASTC_10x10_KHR 0x93BB
	GL_COMPRESSED_RGBA_ASTC_12x10_KHR 0x93BC
	GL_COMPRESSED_RGBA_ASTC_12x12_KHR 0x93BD
	GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR 0x93D0
	GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR 0x93D1
	GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR 0x93D2
	GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR 0x93D3
	GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR 0x93D4
	GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR 0x93D5
	GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR 0x93D6
	GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR 0x93D7
	GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR 0x93D8
	GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR 0x93D9
	GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR 0x93DA
	GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR 0x93DB
	GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR 0x93DC
	GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR 0x93DD