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1{ stdenv, fetchurl, zlib, apngSupport ? true
2, buildPlatform, hostPlatform
3}:
4
5assert zlib != null;
6
7let
8 version = "1.6.31";
9 patchVersion = "1.6.31";
10 sha256 = "0hcbxv9qf4f9q7brrk0ndag526glr8lii43grssv45j9w0nn0ai3";
11 patch_src = fetchurl {
12 url = "mirror://sourceforge/libpng-apng/libpng-${patchVersion}-apng.patch.gz";
13 sha256 = "0f10ih658j514vpvsli0pk378vcmjn78g52cssyg92r4k1r19rla";
14 };
15 whenPatched = stdenv.lib.optionalString apngSupport;
16
17in stdenv.mkDerivation rec {
18 name = "libpng" + whenPatched "-apng" + "-${version}";
19
20 src = fetchurl {
21 url = "mirror://sourceforge/libpng/libpng-${version}.tar.xz";
22 inherit sha256;
23 };
24 postPatch = whenPatched "gunzip < ${patch_src} | patch -Np1";
25
26 outputs = [ "out" "dev" "man" ];
27 outputBin = "dev";
28
29 propagatedBuildInputs = [ zlib ];
30
31 # it's hard to cross-run tests and some check programs didn't compile anyway
32 makeFlags = stdenv.lib.optional (!doCheck) "check_PROGRAMS=";
33 doCheck = hostPlatform == buildPlatform;
34
35 passthru = { inherit zlib; };
36
37 meta = with stdenv.lib; {
38 description = "The official reference implementation for the PNG file format" + whenPatched " with animation patch";
39 homepage = http://www.libpng.org/pub/png/libpng.html;
40 license = licenses.libpng;
41 platforms = platforms.all;
42 maintainers = [ maintainers.vcunat maintainers.fuuzetsu ];
43 };
44}