mirror of
https://github.com/reactos/CMake.git
synced 2024-11-27 21:41:03 +00:00
76 lines
3.2 KiB
CMake
76 lines
3.2 KiB
CMake
# - Find the native PNG includes and library
|
|
#
|
|
# This module searches libpng, the library for working with PNG images.
|
|
#
|
|
# It defines the following variables
|
|
# PNG_INCLUDE_DIRS, where to find png.h, etc.
|
|
# PNG_LIBRARIES, the libraries to link against to use PNG.
|
|
# PNG_DEFINITIONS - You should add_definitons(${PNG_DEFINITIONS}) before compiling code that includes png library files.
|
|
# PNG_FOUND, If false, do not try to use PNG.
|
|
# PNG_VERSION_STRING - the version of the PNG library found (since CMake 2.8.8)
|
|
# Also defined, but not for general use are
|
|
# PNG_LIBRARY, where to find the PNG library.
|
|
# For backward compatiblity the variable PNG_INCLUDE_DIR is also set. It has the same value as PNG_INCLUDE_DIRS.
|
|
#
|
|
# Since PNG depends on the ZLib compression library, none of the above will be
|
|
# defined unless ZLib can be found.
|
|
|
|
#=============================================================================
|
|
# Copyright 2002-2009 Kitware, Inc.
|
|
#
|
|
# Distributed under the OSI-approved BSD License (the "License");
|
|
# see accompanying file Copyright.txt for details.
|
|
#
|
|
# This software is distributed WITHOUT ANY WARRANTY; without even the
|
|
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
# See the License for more information.
|
|
#=============================================================================
|
|
# (To distribute this file outside of CMake, substitute the full
|
|
# License text for the above reference.)
|
|
|
|
if(PNG_FIND_QUIETLY)
|
|
set(_FIND_ZLIB_ARG QUIET)
|
|
endif(PNG_FIND_QUIETLY)
|
|
find_package(ZLIB ${_FIND_ZLIB_ARG})
|
|
|
|
if(ZLIB_FOUND)
|
|
find_path(PNG_PNG_INCLUDE_DIR png.h
|
|
/usr/local/include/libpng # OpenBSD
|
|
)
|
|
|
|
set(PNG_NAMES ${PNG_NAMES} png libpng png15 libpng15 png15d libpng15d png14 libpng14 png14d libpng14d png12 libpng12 png12d libpng12d)
|
|
find_library(PNG_LIBRARY NAMES ${PNG_NAMES} )
|
|
|
|
if (PNG_LIBRARY AND PNG_PNG_INCLUDE_DIR)
|
|
# png.h includes zlib.h. Sigh.
|
|
SET(PNG_INCLUDE_DIRS ${PNG_PNG_INCLUDE_DIR} ${ZLIB_INCLUDE_DIR} )
|
|
SET(PNG_INCLUDE_DIR ${PNG_INCLUDE_DIRS} ) # for backward compatiblity
|
|
SET(PNG_LIBRARIES ${PNG_LIBRARY} ${ZLIB_LIBRARY})
|
|
|
|
if (CYGWIN)
|
|
if(BUILD_SHARED_LIBS)
|
|
# No need to define PNG_USE_DLL here, because it's default for Cygwin.
|
|
else(BUILD_SHARED_LIBS)
|
|
SET (PNG_DEFINITIONS -DPNG_STATIC)
|
|
endif(BUILD_SHARED_LIBS)
|
|
endif (CYGWIN)
|
|
|
|
endif (PNG_LIBRARY AND PNG_PNG_INCLUDE_DIR)
|
|
|
|
if (PNG_PNG_INCLUDE_DIR AND EXISTS "${PNG_PNG_INCLUDE_DIR}/png.h")
|
|
file(STRINGS "${PNG_PNG_INCLUDE_DIR}/png.h" png_version_str REGEX "^#define[ \t]+PNG_LIBPNG_VER_STRING[ \t]+\".+\"")
|
|
|
|
string(REGEX REPLACE "^#define[ \t]+PNG_LIBPNG_VER_STRING[ \t]+\"([^\"]+)\".*" "\\1" PNG_VERSION_STRING "${png_version_str}")
|
|
unset(png_version_str)
|
|
endif (PNG_PNG_INCLUDE_DIR AND EXISTS "${PNG_PNG_INCLUDE_DIR}/png.h")
|
|
endif(ZLIB_FOUND)
|
|
|
|
# handle the QUIETLY and REQUIRED arguments and set PNG_FOUND to TRUE if
|
|
# all listed variables are TRUE
|
|
include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
|
|
find_package_handle_standard_args(PNG
|
|
REQUIRED_VARS PNG_LIBRARY PNG_PNG_INCLUDE_DIR
|
|
VERSION_VAR PNG_VERSION_STRING)
|
|
|
|
mark_as_advanced(PNG_PNG_INCLUDE_DIR PNG_LIBRARY )
|