diff options
Diffstat (limited to 'Modules/FindPNG.cmake')
| -rw-r--r-- | Modules/FindPNG.cmake | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/Modules/FindPNG.cmake b/Modules/FindPNG.cmake index f616973..a6c181c 100644 --- a/Modules/FindPNG.cmake +++ b/Modules/FindPNG.cmake @@ -7,6 +7,7 @@ # PNG_LIBRARIES, the libraries to link against to use PNG. # PNG_DEFINITIONS - You should add_definitons(${PNG_DEFINITIONS}) before compiling code that includes png library files. # PNG_FOUND, If false, do not try to use PNG. +# PNG_VERSION_STRING - the version of the PNG library found (since CMake 2.8.8) # Also defined, but not for general use are # PNG_LIBRARY, where to find the PNG library. # For backward compatiblity the variable PNG_INCLUDE_DIR is also set. It has the same value as PNG_INCLUDE_DIRS. @@ -56,11 +57,19 @@ if(ZLIB_FOUND) endif (PNG_LIBRARY AND PNG_PNG_INCLUDE_DIR) + if (PNG_PNG_INCLUDE_DIR AND EXISTS "${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 DEFAULT_MSG PNG_LIBRARY PNG_PNG_INCLUDE_DIR) +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 ) |