diff options
Diffstat (limited to 'Modules/FindPNG.cmake')
| -rw-r--r-- | Modules/FindPNG.cmake | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/Modules/FindPNG.cmake b/Modules/FindPNG.cmake index f607dc6..f616973 100644 --- a/Modules/FindPNG.cmake +++ b/Modules/FindPNG.cmake @@ -1,14 +1,18 @@ # - Find the native PNG includes and library # -# This module defines -# PNG_INCLUDE_DIR, where to find png.h, etc. +# 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. -# also defined, but not for general use are +# Also defined, but not for general use are # PNG_LIBRARY, where to find the PNG library. -# None of the above will be defined unles zlib can be found. -# PNG depends on Zlib +# 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. @@ -38,7 +42,8 @@ if(ZLIB_FOUND) if (PNG_LIBRARY AND PNG_PNG_INCLUDE_DIR) # png.h includes zlib.h. Sigh. - SET(PNG_INCLUDE_DIR ${PNG_PNG_INCLUDE_DIR} ${ZLIB_INCLUDE_DIR} ) + 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) |