# write.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 no read support and minimal write support.

#

everything = off

# Switch on the write code - this makes a minimalist encoder

option WRITE on

# Choose fixed or floating point APIs and arithmetic.  The choices are

# independent but normally they will match.  It is typically better to use the

# floating point if you have floating point hardware.  If you don't know, or

# (perhaps) to make libpng smaller used fixed point throughout.

#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

# Everything else is optional.  Unlike the read code in libpng the write code

# does not need to deal with arbitrary formats, so only add support for things

# you really do write!  For example you might only write sRGB images, sometimes

# with transparency and never write 16 bit images, so:

option WRITE_sRGB on

option WRITE_tRNS on

#option WRITE_16BIT off (this is the default with 'everything = off')