#!/bin/sh
XGL=no
COMPIZ=no
# auto-start Xgl if direct rendering is available
# and GLX_EXT_texture_from_pixmap is not available in server GLX extensions
# (displayed before client glx extensions by glxinfo)
glxinfo 2>/dev/null | awk 'BEGIN { no_direct = 1; in_client = 0; server_tfp = 0; client_tfp = 0 } /direct rendering: Yes/ { no_direct = 0 } /GLX_EXT_texture_from_pixmap/ { if (in_client) { client_tfp = 1 } else { server_tfp = 1 } } /client glx extensions:/ { in_client = 1 } /GLX extensions/ { exit } END { exit or(no_direct, and(server_tfp, client_tfp)) }' && XGL=yes
# auto-start compiz if direct rendering and GLX_EXT_texture_from_pixmap are available
source /etc/init.d/functions
if [ "$XGL" = "yes" ] || pidof Xgl >/dev/null 2>&1; then
    COMPIZ=yes
elif glxinfo 2>/dev/null | awk 'BEGIN { no_direct = 1; no_tfp = 1 } /direct rendering: Yes/ { no_direct = 0 } /GLX_EXT_texture_from_pixmap/ { no_tfp = 0 } END { exit or(no_direct, no_tfp) }'; then
    COMPIZ=yes
fi
echo "Xgl auto: $XGL"
echo "Compiz auto: $COMPIZ"