We need to query specific OpenGL extensions on embedded system when deciding how a feature can be supported. For example, NPOT support on the embedded is GL_OES_texture_npot. Here is a gl extensions listing on the Pi:

GL_OES_compressed_ETC1_RGB8_texture
GL_OES_compressed_paletted_texture
GL_OES_texture_npot
GL_OES_depth24
GL_OES_vertex_half_float
GL_OES_EGL_image
GL_OES_EGL_image_external
GL_EXT_discard_framebuffer
GL_OES_rgb8_rgba8
GL_OES_depth32
GL_OES_mapbuffer
GL_EXT_texture_format_BGRA8888
GL_APPLE_rgb_422
GL_EXT_debug_marker