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Diffstat (limited to 'Modules/FindGIF.cmake')
| -rw-r--r-- | Modules/FindGIF.cmake | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/Modules/FindGIF.cmake b/Modules/FindGIF.cmake new file mode 100644 index 000000000..41e909805 --- /dev/null +++ b/Modules/FindGIF.cmake @@ -0,0 +1,80 @@ +# This module searches giflib and defines +# GIF_LIBRARIES - libraries to link to in order to use GIF +# GIF_FOUND, if false, do not try to link +# GIF_INCLUDE_DIR, where to find the headers +# GIF_VERSION, reports either version 4 or 3 (for everything before version 4) +# +# The minimum required version of giflib can be specified using the +# standard syntax, e.g. FIND_PACKAGE(GIF 4) +# +# $GIF_DIR is an environment variable that would +# correspond to the ./configure --prefix=$GIF_DIR + +#============================================================================= +# Copyright 2007-2009 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.) + +# Created by Eric Wing. +# Modifications by Alexander Neundorf + +FIND_PATH(GIF_INCLUDE_DIR gif_lib.h + HINTS + $ENV{GIF_DIR} + PATH_SUFFIXES include + PATHS + ~/Library/Frameworks + /usr/freeware +) + +# the gif library can have many names :-/ +SET(POTENTIAL_GIF_LIBS gif libgif ungif libungif giflib giflib4) + +FIND_LIBRARY(GIF_LIBRARY + NAMES ${POTENTIAL_GIF_LIBS} + HINTS + $ENV{GIF_DIR} + PATH_SUFFIXES lib64 lib + PATHS + ~/Library/Frameworks + /usr/freeware +) + +# see readme.txt +SET(GIF_LIBRARIES ${GIF_LIBRARY}) + +# Very basic version detection. +# The GIF_LIB_VERSION string in gif_lib.h seems to be unreliable, since it seems +# to be always " Version 2.0, " in versions 3.x of giflib. +# In version 4 the member UserData was added to GifFileType, so we check for this +# one. +# http://giflib.sourcearchive.com/documentation/4.1.4/files.html +IF(GIF_INCLUDE_DIR) + INCLUDE(CMakePushCheckState) + INCLUDE(CheckStructHasMember) + CMAKE_PUSH_CHECK_STATE() + SET(GIF_VERSION 3) + SET(CMAKE_REQUIRED_INCLUDES "${GIF_INCLUDE_DIR}") + CHECK_STRUCT_HAS_MEMBER(GifFileType UserData gif_lib.h GIF_GifFileType_UserData ) + IF(GIF_GifFileType_UserData) + SET(GIF_VERSION 4) + ENDIF() + CMAKE_POP_CHECK_STATE() +ENDIF() + + +# handle the QUIETLY and REQUIRED arguments and set GIF_FOUND to TRUE if +# all listed variables are TRUE +INCLUDE(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake) +FIND_PACKAGE_HANDLE_STANDARD_ARGS(GIF REQUIRED_VARS GIF_LIBRARY GIF_INCLUDE_DIR + VERSION_VAR GIF_VERSION ) + +MARK_AS_ADVANCED(GIF_INCLUDE_DIR GIF_LIBRARY) |