package("libpng")

    set_homepage("http://www.libpng.org/pub/png/libpng.html")
    set_description("The official PNG reference library")

    set_urls("https://github.com/glennrp/libpng/archive/$(version).zip",
             "https://github.com/glennrp/libpng.git")
    add_versions("v1.6.35", "3d22d46c566b1761a0e15ea397589b3a5f36ac09b7c785382e6470156c04247f")
    add_versions("v1.6.34", "7ffa5eb8f9f3ed23cf107042e5fec28699718916668bbce48b968600475208d3")

    add_deps("zlib")
    if is_host("windows") then
        add_deps("cmake")
    end

    on_load(function (package)
        if package:plat() == "windows" then
            package:add("links", "libpng16_static")
        else
            package:add("links", "png")
        end
    end)
 
    on_install("windows", function (package)
        import("package.tools.cmake").install(package)
    end)

    on_install("macosx", "linux", function (package)
        import("package.tools.autoconf").install(package)
    end)

    on_test(function (package)
        assert(package:has_cfuncs("png_create_read_struct", {includes = "png.h"}))
    end)