Gles20 glcompressedtexsubimage2d gles20:gles20.glCompressedTexSubImage2D Function glCompressedTexSubImage2D:Void( target_:GLenum,level_:GLint,xoffset_:GLint,yoffset_:GLint,width_:GLsizei,height_:GLsizei,format_:GLenum,imageSize_:GLsizei,data_:GLvoid Ptr )#