From Martin Lambers, "It adds a new ReaderWriter plugin for the GTA file format

(http://gta.nongnu.org). This allows to read and write floating point
image data. Unlike other formats, GTA also allows very good compression
ratios for floating point data. The compression method can be selected
with the COMPRESSION option of the plugin.
"

CMakeModules/FindGTA.cmake

@@ -0,0 +1,56 @@
+# Locate libgta
+# This module defines
+# GTA_FOUND, if false, do not try to link to libgta
+# GTA_INCLUDE_DIRS, where to find the headers
+# GTA_LIBRARIES
+#
+# $GTA_DIR is an environment variable that would
+# correspond to the ./configure --prefix=$GTA_DIR
+# used in building libgta.
+
+INCLUDE(FindPkgConfig OPTIONAL)
+
+IF(PKG_CONFIG_FOUND)
+
+    INCLUDE(FindPkgConfig)
+
+    PKG_CHECK_MODULES(GTA gta)
+
+ELSE(PKG_CONFIG_FOUND)
+
+FIND_PATH(GTA_INCLUDE_DIRS gta/gta.hpp
+    $ENV{GTA_DIR}/include
+    $ENV{GTA_DIR}
+    ~/Library/Frameworks
+    /Library/Frameworks
+    /usr/local/include
+    /usr/include
+    /sw/include # Fink
+    /opt/local/include # DarwinPorts
+    /opt/csw/include # Blastwave
+    /opt/include
+    /usr/freeware/include
+)
+
+FIND_LIBRARY(GTA_LIBRARIES 
+    NAMES gta libgta
+    PATHS
+    $ENV{GTA_DIR}/lib
+    $ENV{GTA_DIR}
+    ~/Library/Frameworks
+    /Library/Frameworks
+    /usr/local/lib
+    /usr/lib
+    /sw/lib
+    /opt/local/lib
+    /opt/csw/lib
+    /opt/lib
+    /usr/freeware/lib64
+)
+
+SET(GTA_FOUND "NO")
+IF(GTA_LIBRARIES AND GTA_INCLUDE_DIRS)
+    SET(GTA_FOUND "YES")
+ENDIF(GTA_LIBRARIES AND GTA_INCLUDE_DIRS)
+
+ENDIF(PKG_CONFIG_FOUND)