fixed option not to include OpenEXR loading

src/ACGL/OpenGL/Data/TextureDataLoadStore.cc

@@ -25,11 +25,15 @@
 #include <QImageWriter>
 #endif
 
-// EXR:
-#ifndef ACGL_BUILD_WITH_EXR
-#define ACGL_BUILD_WITH_EXR
-#endif
-
+//
+// OpenEXR:
+// Only compile with OpenEXR support if explicitly wanted so.
+// Note that the application has to be linked to libIlmImf and libIex and the include path has to be set.
+// (in your CMakeLists.txt add:
+//   ADD_DEFINITIONS(-DACGL_BUILD_WITH_EXR)
+//   ADD_DEFINITIONS(-I"/usr/include/OpenEXR/")
+//   SET(LIBRARIES ${LIBRARIES} "-lIlmImf -lIex")
+//
 #ifdef ACGL_BUILD_WITH_EXR
 //#include <ImfInputFile.h>
 #include <ImfRgbaFile.h>
@@ -250,7 +254,7 @@ SharedTextureData loadTextureDataFromRGBE(const std::string &_filename)
 SharedTextureData loadTextureDataFromEXR(const std::string &_filename)
 {
 #ifndef ACGL_BUILD_WITH_EXR
-    error() << "can't load EXR file " << _filename << " ACGL was not build with EXR support" << endl;
+    error() << "can't load EXR file " << _filename << " ACGL was not build with EXR support" << std::endl;
     return SharedTextureData();
 #else
     SharedTextureData data = SharedTextureData( new TextureData() );