# s_read.dfa

#  Build time configuration of libpng

#

# Author: John Bowler

# Copyright: (c) John Bowler, 2013

# Usage rights:

#  To the extent possible under law, the author has waived all copyright and

#  related or neighboring rights to this work.  This work is published from:

#  United States.

#

# Build libpng with simplified read support (only).  This builds a minimal

# libpng able to read all PNG formats and convert them into a small number of

# well understood memory formats.

#

everything = off

option SIMPLIFIED_READ on

# It isn't necessary to chose fixed or floating point for the APIs because the

# simplified API doesn't need fixed or floating point numbers.  It is necessary

# to chose an internal math implementation.  The default (because of 'everything

# = off') is fixed point - turn the floating point implementation on if you have

# hardware floating point or prefer your software floating point implementation.

option FLOATING_ARITHMETIC on

# This is not strictly necessary, but without it the message strings in the API

# will not be filled in

option ERROR_TEXT on

# Switching these options on enables the 'AFIRST' and 'BGR' formats - you don't

# need this if you don't use them, they just allow the in-memory layout to be

# changed to match common hardware formats.

option SIMPLIFIED_READ_AFIRST on

option SIMPLIFIED_READ_BGR on