added a simple benchmark for wxDC::DrawLine() performance

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@53154 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/tests/benchmarks/graphics.cpp b/tests/benchmarks/graphics.cpp
new file mode 100644 (file)
index 0000000..e70c6a2
--- /dev/null
+++ b/tests/benchmarks/graphics.cpp
@@ -0,0 +1,142 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        graphics.cpp
+// Purpose:     Some benchmarks for measuring graphics operations performance
+// Author:      Vadim Zeitlin
+// Created:     2008-04-13
+// RCS-ID:      $Id$
+// Copyright:   (c) 2008 Vadim Zeitlin <vadim@wxwidgets.org>
+// Licence:     wxWindows license
+/////////////////////////////////////////////////////////////////////////////
+
+#include "wx/app.h"
+#include "wx/frame.h"
+#include "wx/cmdline.h"
+#include "wx/dcclient.h"
+#include "wx/dcmemory.h"
+#include "wx/stopwatch.h"
+
+struct GraphicsBenchmarkOptions
+{
+    GraphicsBenchmarkOptions()
+    {
+        mapMode = 0;
+        penWidth = 0;
+
+        width = 800;
+        height = 600;
+
+        numLines = 10000;
+    }
+
+    long mapMode,
+         penWidth,
+         width,
+         height,
+         numLines;
+} opts;
+
+class GraphicsBenchmarkFrame : public wxFrame
+{
+public:
+    GraphicsBenchmarkFrame()
+        : wxFrame(NULL, wxID_ANY, "wxWidgets Graphics Benchmark")
+    {
+        Connect(wxEVT_PAINT,
+                wxPaintEventHandler(GraphicsBenchmarkFrame::OnPaint));
+
+        Show();
+        SetClientSize(opts.width, opts.height);
+        wxClientDC dc(this);
+        BenchmarkLines("client", dc);
+
+        wxBitmap bmp(opts.width, opts.height);
+        wxMemoryDC dc2(bmp);
+        BenchmarkLines("memory", dc2);
+    }
+
+protected:
+    void OnPaint(wxPaintEvent& WXUNUSED(event))
+    {
+        wxPaintDC dc(this);
+
+        BenchmarkLines(" paint", dc);
+
+        wxTheApp->ExitMainLoop();
+    }
+
+    void BenchmarkLines(const char *msg, wxDC& dc)
+    {
+        if ( opts.mapMode != 0 )
+            dc.SetMapMode(opts.mapMode);
+        if ( opts.penWidth != 0 )
+            dc.SetPen(wxPen(*wxWHITE, opts.penWidth));
+
+        wxPrintf("Benchmarking %s DC: ", msg);
+
+        wxStopWatch sw;
+        int x = 0,
+            y = 0;
+        for ( int n = 0; n < opts.numLines; n++ )
+        {
+            int x1 = rand() % opts.width,
+                y1 = rand() % opts.height;
+
+            dc.DrawLine(x, y, x1, y1);
+
+            x = x1;
+            y = y1;
+        }
+
+        const long t = sw.Time();
+
+        wxPrintf("%d lines done in %lums = %gus/line\n",
+                 opts.numLines, t, (1000. * t)/opts.numLines);
+    }
+};
+
+class GraphicsBenchmarkApp : public wxApp
+{
+public:
+    virtual void OnInitCmdLine(wxCmdLineParser& parser)
+    {
+        static const wxCmdLineEntryDesc desc[] =
+        {
+            { wxCMD_LINE_OPTION, "m", "map-mode", "", wxCMD_LINE_VAL_NUMBER },
+            { wxCMD_LINE_OPTION, "p", "pen-width", "", wxCMD_LINE_VAL_NUMBER },
+            { wxCMD_LINE_OPTION, "w", "width", "", wxCMD_LINE_VAL_NUMBER },
+            { wxCMD_LINE_OPTION, "h", "height", "", wxCMD_LINE_VAL_NUMBER },
+            { wxCMD_LINE_OPTION, "L", "lines", "", wxCMD_LINE_VAL_NUMBER },
+        };
+
+        parser.SetDesc(desc);
+    }
+
+    virtual bool OnCmdLineParsed(wxCmdLineParser& parser)
+    {
+        if ( parser.Found("m", &opts.mapMode) &&
+                (opts.mapMode < 1 || opts.mapMode > wxMM_METRIC) )
+            return false;
+        if ( parser.Found("p", &opts.penWidth) && opts.penWidth < 1 )
+            return false;
+        if ( parser.Found("w", &opts.width) && opts.width < 1 )
+            return false;
+        if ( parser.Found("h", &opts.height) && opts.height < 1 )
+            return false;
+        if ( parser.Found("L", &opts.numLines) && opts.numLines < 1 )
+            return false;
+
+        return true;
+    }
+
+    virtual bool OnInit()
+    {
+        if ( !wxApp::OnInit() )
+            return false;
+
+        new GraphicsBenchmarkFrame;
+
+        return true;
+    }
+};
+
+IMPLEMENT_APP_CONSOLE(GraphicsBenchmarkApp)