GL_OES_EGL_image_external
https://www.khronos.org/registry/OpenGL/extensions/OES/OES_EGL_image_external.txt
GL_OES_EGL_image_external

	GL_TEXTURE_EXTERNAL_OES 0x8D65
	GL_SAMPLER_EXTERNAL_OES 0x8D66
	GL_TEXTURE_BINDING_EXTERNAL_OES 0x8D67
	GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES 0x8D68