--- /dev/null
+# - Find WebP library
+# Find the native WebP headers and libraries.
+#
+# WEBP_INCLUDE_DIRS - where to find webp/decode.h, etc.
+# WEBP_LIBRARIES - List of libraries when using webp.
+# WEBP_FOUND - True if webp is found.
+
+#=============================================================================
+#Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
+#All rights reserved.
+#
+#Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+#* Redistributions of source code must retain the above copyright notice,
+#this list of conditions and the following disclaimer.
+#
+#* Redistributions in binary form must reproduce the above copyright notice,
+#this list of conditions and the following disclaimer in the documentation
+#and/or other materials provided with the distribution.
+#
+#* Neither the names of Kitware, Inc., the Insight Software Consortium, nor
+#the names of their contributors may be used to endorse or promote products
+#derived from this software without specific prior written permission.
+#
+#THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+#AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+#IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+#ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+#LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+#CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+#SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+#INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+#CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+#ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+#POSSIBILITY OF SUCH DAMAGE.
+#=============================================================================
+
+# Look for the header file.
+FIND_PATH(WEBP_INCLUDE_DIR NAMES webp/decode.h)
+MARK_AS_ADVANCED(WEBP_INCLUDE_DIR)
+
+# Look for the library.
+FIND_LIBRARY(WEBP_LIBRARY NAMES webp)
+MARK_AS_ADVANCED(WEBP_LIBRARY)
+
+# handle the QUIETLY and REQUIRED arguments and set WEBFOUND_FOUND to TRUE if
+# all listed variables are TRUE
+INCLUDE(${CMAKE_ROOT}/Modules/FindPackageHandleStandardArgs.cmake)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(WebP DEFAULT_MSG WEBP_LIBRARY WEBP_INCLUDE_DIR)
+
+SET(WEBP_LIBRARIES ${WEBP_LIBRARY})
+SET(WEBP_INCLUDE_DIRS ${WEBP_INCLUDE_DIR})
+
+SET(_WEBP_RQ_INCLUDES ${CMAKE_REQUIRED_INCLUDES})
+
+if(NOT DEFINED _WEBP_COMPILATION_TEST)
+ INCLUDE (CheckCSourceCompiles)
+ SET(CMAKE_REQUIRED_INCLUDES ${CMAKE_REQUIRED_INCLUDES} ${WEBP_INCLUDE_DIRS})
+ CHECK_C_SOURCE_COMPILES("#include <webp/decode.h>
+ int main(void) {
+ #if WEBP_DECODER_ABI_VERSION < 0x0200
+ error; // Deliberate compile-time error
+ #endif
+ return 0;
+ }"
+ _WEBP_COMPILATION_TEST)
+ SET(CMAKE_REQUIRED_INCLUDES ${_WEBP_RQ_INCLUDES})
+endif()
+
+if(NOT _WEBP_COMPILATION_TEST)
+ set( USE_INTERNAL_WEBP 1 )
+endif()