1# s_read.dfa
 2#  Build time configuration of libpng
 3#
 4# Author: John Bowler
 5# Copyright: (c) John Bowler, 2013
 6# Usage rights:
 7#  To the extent possible under law, the author has waived all copyright and
 8#  related or neighboring rights to this work.  This work is published from:
 9#  United States.
10#
11# Build libpng with simplified read support (only).  This builds a minimal
12# libpng able to read all PNG formats and convert them into a small number of
13# well understood memory formats.
14#
15
16everything = off
17
18option SIMPLIFIED_READ on
19
20# It isn't necessary to chose fixed or floating point for the APIs because the
21# simplified API doesn't need fixed or floating point numbers.  It is necessary
22# to chose an internal math implementation.  The default (because of 'everything
23# = off') is fixed point - turn the floating point implementation on if you have
24# hardware floating point or prefer your software floating point implementation.
25option FLOATING_ARITHMETIC on
26
27# This is not strictly necessary, but without it the message strings in the API
28# will not be filled in
29option ERROR_TEXT on
30
31# Switching these options on enables the 'AFIRST' and 'BGR' formats - you don't
32# need this if you don't use them, they just allow the in-memory layout to be
33# changed to match common hardware formats.
34option SIMPLIFIED_READ_AFIRST on
35option SIMPLIFIED_READ_BGR on