tests/image/rawbmp.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        tests/image/rawbmp.cpp
   3 // Purpose:     Test for using raw bitmap access classes with wxImage
   4 // Author:      Vadim Zeitlin
   5 // Created:     2008-05-30
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2008 Vadim Zeitlin <vadim@wxwidgets.org>
   8 // Licence:     wxWindows licence
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 // ----------------------------------------------------------------------------
  12 // headers
  13 // ----------------------------------------------------------------------------
  14
  15 #include "testprec.h"
  16
  17 #ifdef __BORLANDC__
  18     #pragma hdrstop
  19 #endif
  20
  21 #ifdef wxHAS_RAW_BITMAP
  22
  23 #ifndef WX_PRECOMP
  24 #endif // WX_PRECOMP
  25
  26 #include "wx/image.h"
  27 #include "wx/rawbmp.h"
  28
  29 namespace
  30 {
  31     const int WIDTH = 10;
  32     const int HEIGHT = 10;
  33 }
  34
  35 #define ASSERT_COL_EQUAL(x, y) \
  36     CPPUNIT_ASSERT_EQUAL( (unsigned char)(x), (y) )
  37
  38 // ----------------------------------------------------------------------------
  39 // test class
  40 // ----------------------------------------------------------------------------
  41
  42 class ImageRawTestCase : public CppUnit::TestCase
  43 {
  44 public:
  45     ImageRawTestCase() { }
  46
  47 private:
  48     CPPUNIT_TEST_SUITE( ImageRawTestCase );
  49         CPPUNIT_TEST( RGBImage );
  50     CPPUNIT_TEST_SUITE_END();
  51
  52     void RGBImage();
  53
  54     DECLARE_NO_COPY_CLASS(ImageRawTestCase)
  55 };
  56
  57 CPPUNIT_TEST_SUITE_REGISTRATION( ImageRawTestCase );
  58 CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( ImageRawTestCase, "ImageRawTestCase" );
  59
  60 void ImageRawTestCase::RGBImage()
  61 {
  62     // create a check board image
  63     wxImage image(WIDTH, HEIGHT);
  64
  65     wxImagePixelData data(image);
  66     wxImagePixelData::Iterator p(data);
  67     for ( int y = 0; y < HEIGHT; y++ )
  68     {
  69         const wxImagePixelData::Iterator rowStart = p;
  70
  71         for ( int x = 0; x < WIDTH; x++ )
  72         {
  73             p.Red() =
  74             p.Green() =
  75             p.Blue() = (x + y) % 2 ? 0 : -1;
  76             ++p;
  77         }
  78
  79         p = rowStart;
  80         p.OffsetY(data, 1);
  81     }
  82
  83     // test a few pixels
  84     ASSERT_COL_EQUAL( 0xff, image.GetRed(0, 0) );
  85     ASSERT_COL_EQUAL( 0xff, image.GetBlue(1, 1) );
  86     ASSERT_COL_EQUAL( 0, image.GetGreen(0, 1) );
  87     ASSERT_COL_EQUAL( 0, image.GetGreen(1, 0) );
  88 }
  89
  90 #endif // wxHAS_RAW_BITMAP