Add a simple benchmark of wxDisplaySize() and related functions

This benchmark shows that wxGetDisplaySize() has only minimal overhead
compared to wxDisplaySize(), but wxDisplay().GetGeometry() is almost 3
times slower (under wxGTK).

tests/benchmarks/Makefile.in

@@ -64,6 +64,7 @@ BENCH_GUI_CXXFLAGS = -D__WX$(TOOLKIT)__ $(__WXUNIV_DEFINE_p) \
 BENCH_GUI_OBJECTS =  \
 	$(__bench_gui___win32rc) \
 	bench_gui_bench.o \
+	bench_gui_display.o \
 	bench_gui_image.o
 BENCH_GRAPHICS_CXXFLAGS = -D__WX$(TOOLKIT)__ $(__WXUNIV_DEFINE_p) \
 	$(__DEBUG_DEFINE_p) $(__EXCEPTIONS_DEFINE_p) $(__RTTI_DEFINE_p) \
@@ -306,6 +307,9 @@ bench_gui_sample_rc.o: $(srcdir)/../../samples/sample.rc
 bench_gui_bench.o: $(srcdir)/bench.cpp
 	$(CXXC) -c -o $@ $(BENCH_GUI_CXXFLAGS) $(srcdir)/bench.cpp
 
+bench_gui_display.o: $(srcdir)/display.cpp
+	$(CXXC) -c -o $@ $(BENCH_GUI_CXXFLAGS) $(srcdir)/display.cpp
+
 bench_gui_image.o: $(srcdir)/image.cpp
 	$(CXXC) -c -o $@ $(BENCH_GUI_CXXFLAGS) $(srcdir)/image.cpp
 

tests/benchmarks/bench.bkl

@@ -36,6 +36,7 @@
 
         <sources>
             bench.cpp
+            display.cpp
             image.cpp
         </sources>
         <wx-lib>core</wx-lib>

tests/benchmarks/bench_vc7_bench_gui.vcproj

@@ -286,6 +286,9 @@
 			<File
 				RelativePath=".\bench.cpp">
 			</File>
+			<File
+				RelativePath=".\display.cpp">
+			</File>
 			<File
 				RelativePath=".\image.cpp">
 			</File>

tests/benchmarks/bench_vc8_bench_gui.vcproj

@@ -810,6 +810,10 @@
 				RelativePath=".\bench.cpp"
 				>
 			</File>
+			<File
+				RelativePath=".\display.cpp"
+				>
+			</File>
 			<File
 				RelativePath=".\image.cpp"
 				>

tests/benchmarks/bench_vc9_bench_gui.vcproj

@@ -782,6 +782,10 @@
 				RelativePath=".\bench.cpp"
 				>
 			</File>
+			<File
+				RelativePath=".\display.cpp"
+				>
+			</File>
 			<File
 				RelativePath=".\image.cpp"
 				>

tests/benchmarks/display.cpp

@@ -0,0 +1,30 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        tests/benchmarks/display.cpp
+// Purpose:     wxDisplay benchmarks
+// Author:      Vadim Zeitlin
+// Created:     2018-09-30
+// Copyright:   (c) 2018 Vadim Zeitlin <vadim@wxwidgets.org>
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+#include "wx/display.h"
+#include "wx/gdicmn.h"
+
+#include "bench.h"
+
+BENCHMARK_FUNC(DisplaySize)
+{
+    int w, h;
+    wxDisplaySize(&w, &h);
+    return w > 0;
+}
+
+BENCHMARK_FUNC(GetDisplaySize)
+{
+    return wxGetDisplaySize().x > 0;
+}
+
+BENCHMARK_FUNC(DisplayGetGeometry)
+{
+    return wxDisplay().GetGeometry().GetSize().x > 0;
+}

tests/benchmarks/makefile.bcc

@@ -54,6 +54,7 @@ BENCH_GUI_CXXFLAGS = $(__RUNTIME_LIBS) -I$(BCCDIR)\include $(__DEBUGINFO) \
 	$(__DLLFLAG_p) -I.\..\..\samples -DNOPCH $(CPPFLAGS) $(CXXFLAGS)
 BENCH_GUI_OBJECTS =  \
 	$(OBJS)\bench_gui_bench.obj \
+	$(OBJS)\bench_gui_display.obj \
 	$(OBJS)\bench_gui_image.obj
 BENCH_GRAPHICS_CXXFLAGS = $(__RUNTIME_LIBS) -I$(BCCDIR)\include $(__DEBUGINFO) \
 	$(__OPTIMIZEFLAG) $(__THREADSFLAG_1) -D__WXMSW__ $(__WXUNIV_DEFINE_p) \
@@ -340,6 +341,9 @@ $(OBJS)\bench_gui_sample.res: .\..\..\samples\sample.rc
 $(OBJS)\bench_gui_bench.obj: .\bench.cpp
 	$(CXX) -q -c -P -o$@ $(BENCH_GUI_CXXFLAGS) .\bench.cpp
 
+$(OBJS)\bench_gui_display.obj: .\display.cpp
+	$(CXX) -q -c -P -o$@ $(BENCH_GUI_CXXFLAGS) .\display.cpp
+
 $(OBJS)\bench_gui_image.obj: .\image.cpp
 	$(CXX) -q -c -P -o$@ $(BENCH_GUI_CXXFLAGS) .\image.cpp
 

tests/benchmarks/makefile.gcc

@@ -49,6 +49,7 @@ BENCH_GUI_CXXFLAGS = $(__DEBUGINFO) $(__OPTIMIZEFLAG) $(__THREADSFLAG) \
 BENCH_GUI_OBJECTS =  \
 	$(OBJS)\bench_gui_sample_rc.o \
 	$(OBJS)\bench_gui_bench.o \
+	$(OBJS)\bench_gui_display.o \
 	$(OBJS)\bench_gui_image.o
 BENCH_GRAPHICS_CXXFLAGS = $(__DEBUGINFO) $(__OPTIMIZEFLAG) $(__THREADSFLAG) \
 	$(GCCFLAGS) -DHAVE_W32API_H -D__WXMSW__ $(__WXUNIV_DEFINE_p) \
@@ -318,6 +319,9 @@ $(OBJS)\bench_gui_sample_rc.o: ./../../samples/sample.rc
 $(OBJS)\bench_gui_bench.o: ./bench.cpp
 	$(CXX) -c -o $@ $(BENCH_GUI_CXXFLAGS) $(CPPDEPS) $<
 
+$(OBJS)\bench_gui_display.o: ./display.cpp
+	$(CXX) -c -o $@ $(BENCH_GUI_CXXFLAGS) $(CPPDEPS) $<
+
 $(OBJS)\bench_gui_image.o: ./image.cpp
 	$(CXX) -c -o $@ $(BENCH_GUI_CXXFLAGS) $(CPPDEPS) $<
 

tests/benchmarks/makefile.vc

@@ -51,6 +51,7 @@ BENCH_GUI_CXXFLAGS = /M$(__RUNTIME_LIBS_26)$(__DEBUGRUNTIME) /DWIN32 \
 	/DNOPCH /D_CONSOLE $(__RTTIFLAG) $(__EXCEPTIONSFLAG) $(CPPFLAGS) $(CXXFLAGS)
 BENCH_GUI_OBJECTS =  \
 	$(OBJS)\bench_gui_bench.obj \
+	$(OBJS)\bench_gui_display.obj \
 	$(OBJS)\bench_gui_image.obj
 BENCH_GUI_RESOURCES =  \
 	$(OBJS)\bench_gui_sample.res
@@ -512,6 +513,9 @@ $(OBJS)\bench_gui_sample.res: .\..\..\samples\sample.rc
 $(OBJS)\bench_gui_bench.obj: .\bench.cpp
 	$(CXX) /c /nologo /TP /Fo$@ $(BENCH_GUI_CXXFLAGS) .\bench.cpp
 
+$(OBJS)\bench_gui_display.obj: .\display.cpp
+	$(CXX) /c /nologo /TP /Fo$@ $(BENCH_GUI_CXXFLAGS) .\display.cpp
+
 $(OBJS)\bench_gui_image.obj: .\image.cpp
 	$(CXX) /c /nologo /TP /Fo$@ $(BENCH_GUI_CXXFLAGS) .\image.cpp