mirror of
https://git.code.sf.net/p/libpng/code.git
synced 2025-07-10 18:04:09 +02:00
c912050a7b
configurations don't build because of missing contrib/libtests test programs and overly complex dependencies in scripts/pnglibconf.dfa. This change adds contrib/conftest/*.dfa files that can be used in automatic build scripts to ensure that these configurations continue to build.
59 lines
2.0 KiB
Plaintext
59 lines
2.0 KiB
Plaintext
# 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
|