Fix T50630: Fluid fails on win32 w/ unicode paths

Allow overriding gzip open w/ elbeem.

intern/elbeem/CMakeLists.txt

@@ -107,6 +107,14 @@ add_definitions(
 	-DNEWDIRVELMOTEST=0
 )
 
+if(WIN32)
+	# We need BLI_gzopen on win32 for unicode paths
+	add_definitions(
+		-DLBM_GZIP_OVERRIDE_H="${CMAKE_SOURCE_DIR}/source/blender/blenlib/BLI_fileops.h"
+		-D LBM_GZIP_OPEN_FN="\(gzFile\)BLI_gzopen"
+	)
+endif()
+
 if(WITH_OPENMP)
 	add_definitions(-DPARALLEL=1)
 else()

intern/elbeem/intern/ntl_blenderdumper.cpp

@@ -22,7 +22,11 @@
 
 #include <zlib.h>
 
-
+#ifdef LBM_GZIP_OVERRIDE_H
+#  include LBM_GZIP_OVERRIDE_H
+#else
+#  define LBM_GZIP_OPEN_FN(a, b) gzopen(a, b)
+#endif
 
 /******************************************************************************
  * Constructor
@@ -141,7 +145,8 @@ int ntlBlenderDumper::renderScene( void )
 					std::ostringstream bvelfilename;
 					bvelfilename << boutfilename.str();
 					bvelfilename << ".bvel.gz";
-					gzf = gzopen(bvelfilename.str().c_str(), "wb9");
+					/* wraps gzopen */
+					gzf = LBM_GZIP_OPEN_FN(bvelfilename.str().c_str(), "wb9");
 					if(gzf) {
 						int numVerts;
 						if(sizeof(numVerts)!=4) { errMsg("ntlBlenderDumper::renderScene","Invalid int size"); return 1; }
@@ -162,7 +167,8 @@ int ntlBlenderDumper::renderScene( void )
 
 				// compress all bobj's 
 				boutfilename << ".bobj.gz";
-				gzf = gzopen(boutfilename.str().c_str(), "wb1"); // wb9 is slow for large meshes!
+				/* wraps gzopen */
+				gzf = LBM_GZIP_OPEN_FN(boutfilename.str().c_str(), "wb1"); // wb9 is slow for large meshes!
 				if (!gzf) {
 					errMsg("ntlBlenderDumper::renderScene","Unable to open output '" + boutfilename.str() + "' ");
 					return 1; }