if(WITH_SYSTEM_PNG)

find_package(PNG REQUIRED)

set(PNG_LIBRARIES ${PNG_LIBRARIES} PARENT_SCOPE)

else()

set(PNG_SRC

"libpng/png.c"

"libpng/pngerror.c"

"libpng/pngget.c"

"libpng/pngmem.c"

"libpng/pngpread.c"

"libpng/pngread.c"

"libpng/pngrio.c"

"libpng/pngrtran.c"

"libpng/pngrutil.c"

"libpng/pngset.c"

"libpng/pngtest.c"

"libpng/pngtrans.c"

"libpng/pngwio.c"

"libpng/pngwrite.c"

"libpng/pngwtran.c"

"libpng/pngwutil.c")

configure_file("libpng/scripts/pnglibconf.h.prebuilt"

"libpng/pnglibconf.h"

COPYONLY)

set(PNG_HPP

"libpng/png.h"

"libpng/pngconf.h"

"libpng/pngdebug.h"

"libpng/pnginfo.h"

"libpng/pnglibconf.h"

"libpng/pngpriv.h"

"libpng/pngstruct.h")

source_group("" FILES ${PNG_SRC})

source_group("" FILES ${PNG_HPP})

add_library("png" STATIC ${PNG_SRC} ${PNG_HPP})

set_property(TARGET "png" PROPERTY FOLDER "External Libraries")

disable_project_warnings("png")

if(MSVC)

sm_add_compile_definition("png" _CRT_SECURE_NO_WARNINGS)

endif()

target_include_directories("png" PUBLIC

"zlib"

$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/libpng>

$<INSTALL_INTERFACE:libpng>

)

endif()