Add more detailled configuration for OpenCL use, and make OpenCL default to on

Add a boolean whether to use OpenCL for just a subset of functions, and a
numberical minimum length of a cell group for OpenCL to be used. No
functionality or GUI for this yet implemented, just the setting fields.

Make whether to use OpenCL default to "on". Sure, this breaks stuff right and
left for now. Fixes and workarounds later.

Change-Id: I09b7aff9c7d1845df2bf01f09616e646373f030c

sc/inc/calcconfig.hxx

@@ -40,9 +40,12 @@ struct SC_DLLPUBLIC ScCalcConfig
     formula::FormulaGrammar::AddressConvention meStringRefAddressSyntax;
     StringConversion meStringConversion;
     bool mbEmptyStringAsZero:1;
+
     bool mbOpenCLEnabled:1;
+    bool mbOpenCLSubsetOnly:1;
     bool mbOpenCLAutoSelect:1;
     OUString maOpenCLDevice;
+    int mnOpenCLMinimumFormulaGroupSize;
 
     ScCalcConfig();
 

sc/source/core/tool/calcconfig.cxx

@@ -13,8 +13,10 @@ ScCalcConfig::ScCalcConfig() :
     meStringRefAddressSyntax(formula::FormulaGrammar::CONV_UNSPECIFIED),
     meStringConversion(STRING_CONVERSION_LOCALE_DEPENDENT),     // old LibreOffice behavior
     mbEmptyStringAsZero(false),
-    mbOpenCLEnabled(false),
-    mbOpenCLAutoSelect(true)
+    mbOpenCLEnabled(true),
+    mbOpenCLSubsetOnly(true),
+    mbOpenCLAutoSelect(true),
+    mnOpenCLMinimumFormulaGroupSize(20)
 {
 }
 
@@ -38,8 +40,10 @@ bool ScCalcConfig::operator== (const ScCalcConfig& r) const
            meStringConversion == r.meStringConversion &&
            mbEmptyStringAsZero == r.mbEmptyStringAsZero &&
            mbOpenCLEnabled == r.mbOpenCLEnabled &&
+           mbOpenCLSubsetOnly == r.mbOpenCLSubsetOnly &&
            mbOpenCLAutoSelect == r.mbOpenCLAutoSelect &&
-           maOpenCLDevice == r.maOpenCLDevice;
+           maOpenCLDevice == r.maOpenCLDevice &&
+           mnOpenCLMinimumFormulaGroupSize == r.mnOpenCLMinimumFormulaGroupSize;
 }
 
 bool ScCalcConfig::operator!= (const ScCalcConfig& r) const