Document --use-pixman option

man/weston.man

@@ -163,6 +163,11 @@ X windows to emulate the same number of outputs.
 \fB\-\-width\fR=\fIW\fR, \fB\-\-height\fR=\fIH\fR
 Make the default size of each X window
 .IR W x H " pixels."
+.TP
+.B \-\-use\-pixman
+Use the pixman renderer.  By default weston will try to use EGL and
+GLES2 for rendering.  Passing this option will make weston use the
+pixman library for software compsiting.
 .
 .\" ***************************************************************
 .SH FILES

src/compositor.c

@@ -3214,6 +3214,7 @@ usage(int error_code)
 		"  --width=WIDTH\t\tWidth of X window\n"
 		"  --height=HEIGHT\tHeight of X window\n"
 		"  --fullscreen\t\tRun in fullscreen mode\n"
+		"  --use-pixman\t\tUse the pixman (CPU) renderer\n"
 		"  --output-count=COUNT\tCreate multiple outputs\n"
 		"  --no-input\t\tDont create input devices\n\n");