src/tests/servers/app/benchmark/StringTest.cpp

   1 /*
   2  * Copyright (C) 2008-2009 Stephan Aßmus <superstippi@gmx.de>
   3  * All rights reserved. Distributed under the terms of the MIT license.
   4  */
   5
   6 #include "StringTest.h"
   7
   8 #include <stdio.h>
   9
  10 #include <String.h>
  11 #include <View.h>
  12
  13 #include "TestSupport.h"
  14
  15
  16 StringTest::StringTest()
  17         : Test(),
  18           fTestDuration(0),
  19           fTestStart(-1),
  20           fGlyphsRendered(0),
  21           fGlyphsPerLine(500),
  22           fIterations(0),
  23           fMaxIterations(1500),
  24
  25           fStartHeight(11.0),
  26           fLineHeight(15.0)
  27 {
  28 }
  29
  30
  31 StringTest::~StringTest()
  32 {
  33 }
  34
  35
  36 void
  37 StringTest::Prepare(BView* view)
  38 {
  39 //      SetupClipping(view);
  40
  41         font_height fh;
  42         view->GetFontHeight(&fh);
  43         fLineHeight = ceilf(fh.ascent) + ceilf(fh.descent)
  44                 + ceilf(fh.leading);
  45         fStartHeight = ceilf(fh.ascent) + ceilf(fh.descent);
  46         fViewBounds = view->Bounds();
  47
  48         BString string;
  49         string.Append('M', fGlyphsPerLine);
  50         while (view->StringWidth(string.String()) < fViewBounds.Width() - 10)
  51                 string.Append('M', 1);
  52         while (view->StringWidth(string.String()) > fViewBounds.Width() - 10)
  53                 string.Remove(string.Length() - 1, 1);
  54
  55         fGlyphsPerLine = 60; //string.Length();
  56         fTestDuration = 0;
  57         fGlyphsRendered = 0;
  58         fIterations = 0;
  59         fTestStart = system_time();
  60 }
  61
  62 bool
  63 StringTest::RunIteration(BView* view)
  64 {
  65         BPoint textLocation;
  66         textLocation.x = 5;
  67         textLocation.y = random_number_between(fStartHeight,
  68                 fStartHeight + fLineHeight / 2);
  69
  70         char buffer[fGlyphsPerLine + 1];
  71         buffer[fGlyphsPerLine] = 0;
  72
  73         bigtime_t now = system_time();
  74
  75         while (true) {
  76                 // fill string with random chars
  77                 for (uint32 j = 0; j < fGlyphsPerLine; j++)
  78                         buffer[j] = 'A' + rand() % ('z' - 'A');
  79
  80                 view->DrawString(buffer, textLocation);
  81
  82                 fGlyphsRendered += fGlyphsPerLine;
  83
  84                 // offset text location
  85                 textLocation.y += fLineHeight;
  86                 if (textLocation.y > fViewBounds.bottom)
  87                         break;
  88         }
  89
  90         view->Sync();
  91
  92         fTestDuration += system_time() - now;
  93         fIterations++;
  94
  95         return fIterations < fMaxIterations;
  96 }
  97
  98
  99 void
 100 StringTest::PrintResults(BView* view)
 101 {
 102         if (fTestDuration == 0) {
 103                 printf("Test was not run.\n");
 104                 return;
 105         }
 106         bigtime_t timeLeak = system_time() - fTestStart - fTestDuration;
 107
 108         Test::PrintResults(view);
 109
 110         printf("Glyphs per DrawString() call: %ld\n", fGlyphsPerLine);
 111         printf("Glyphs per second: %.3f\n",
 112                 fGlyphsRendered * 1000000.0 / fTestDuration);
 113         printf("Average time between iterations: %.4f seconds.\n",
 114                 (float)timeLeak / fIterations / 1000000);
 115 }
 116
 117
 118 Test*
 119 StringTest::CreateTest()
 120 {
 121         return new StringTest();
 122 }
 123