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#############################################################################
# Name: build/cmake/lib/png.cmake
# Purpose: Use external or internal libpng
# Author: Tobias Taschner
# Created: 2016-09-21
# Copyright: (c) 2016 wxWidgets development team
# Licence: wxWindows licence
#############################################################################
if(wxUSE_LIBPNG STREQUAL "builtin")
# TODO: implement building libpng via its CMake file, using
# add_subdirectory or ExternalProject_Add
if(NOT MSVC)
set(PNG_EXTRA_SOURCES
src/png/mips/filter_msa_intrinsics.c
src/png/mips/mips_init.c
src/png/powerpc/filter_vsx_intrinsics.c
src/png/powerpc/powerpc_init.c
)
endif()
wx_add_builtin_library(wxpng
src/png/png.c
src/png/pngerror.c
src/png/pngget.c
src/png/pngmem.c
src/png/pngpread.c
src/png/pngread.c
src/png/pngrio.c
src/png/pngrtran.c
src/png/pngrutil.c
src/png/pngset.c
src/png/pngtrans.c
src/png/pngwio.c
src/png/pngwrite.c
src/png/pngwtran.c
src/png/pngwutil.c
src/png/arm/arm_init.c
src/png/arm/filter_neon_intrinsics.c
src/png/arm/palette_neon_intrinsics.c
src/png/intel/intel_init.c
src/png/intel/filter_sse2_intrinsics.c
${PNG_EXTRA_SOURCES}
)
if(WIN32)
# define this to get rid of a warning about using POSIX lfind():
# confusingly enough, we do define lfind as _lfind for MSVC but
# doing this results in a just more confusing warning, see:
# http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=101278
target_compile_definitions(wxpng PRIVATE _CRT_NONSTDC_NO_WARNINGS)
endif()
target_compile_definitions(wxpng PRIVATE PNG_INTEL_SSE)
target_include_directories(wxpng PRIVATE ${ZLIB_INCLUDE_DIRS})
target_link_libraries(wxpng PRIVATE ${ZLIB_LIBRARIES})
set(PNG_LIBRARIES wxpng)
set(PNG_INCLUDE_DIRS ${wxSOURCE_DIR}/src/png)
elseif(wxUSE_LIBPNG)
find_package(PNG REQUIRED)
endif()
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