1 # write.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 no read support and minimal write support. 12 # 13 14 everything = off 15 16 # Switch on the write code - this makes a minimalist encoder 17 18 option WRITE on 19 20 # Choose fixed or floating point APIs and arithmetic. The choices are 21 # independent but normally they will match. It is typically better to use the 22 # floating point if you have floating point hardware. If you don't know, or 23 # (perhaps) to make libpng smaller used fixed point throughout. 24 25 #Fixed point: 26 #option FIXED_POINT on 27 #option FLOATING_ARITHMETIC off 28 29 #Floating point: 30 option FLOATING_POINT on 31 option FLOATING_ARITHMETIC on 32 33 # Basic error handling, IO and user memory support. The latter allows the 34 # application program to provide its own implementations of 'malloc' and 'free'. 35 option SETJMP on 36 option STDIO on 37 option USER_MEM on 38 39 # Everything else is optional. Unlike the read code in libpng the write code 40 # does not need to deal with arbitrary formats, so only add support for things 41 # you really do write! For example you might only write sRGB images, sometimes 42 # with transparency and never write 16 bit images, so: 43 option WRITE_sRGB on 44 option WRITE_tRNS on 45 #option WRITE_16BIT off (this is the default with 'everything = off') 46
