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-# 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 basic read support. This enables the lowest level libpng
-# read API - the one where the calling code has to use a loop to read each row.
-# At present this is the API used by most programs.
-#
-# Support is enabled only for those chunks and transformations that are
-# typically required - others can be added easily.
-#
-
-everything = off
-
-# The sequential read code is enabled here; the progressive code can be used
-# instead but there is no point enabling both.
-
-option SEQUENTIAL_READ on
-
-# Likewise it is pointless enabling both fixed and floating point APIs. Choose
-# one or the other for both the API and the internal math.
-
-#Fixed point:
-#option FIXED_POINT on
-#option FLOATING_ARITHMETIC off
-
-#Floating point:
-option FLOATING_POINT on
-option FLOATING_ARITHMETIC on
-
-# Basic error handling, IO and user memory support. The latter allows the
-# application program to provide its own implementations of 'malloc' and 'free'.
-option SETJMP on
-option STDIO on
-option USER_MEM on
-
-# To read the full set of PNG images correctly interlace, transparency and
-# 16-bit support is required. The application can implement interlace itself,
-# but very few do and it's no longer possible to disable it when READ is
-# enabled.
-option READ_tRNS on
-option READ_16BIT on
-
-# Everything else is application dependent. This file assumes the app handles
-# all the native PNG bit layouts, so it doesn't need any of layout change
-# transforms, but needs libpng to perform gamma correction. It doesn't do any
-# colorspace stuff and ignores the 'significant bit' information.
-#
-# If your app always expands the image to a limited set of bit layouts you
-# probably want to consider using the simplified API instead of the low level
-# one - see png.h and s_read.dfa.
-option READ_GAMMA on