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 #ifndef WX_PRECOMP
  22 #endif // WX_PRECOMP
  23
  24 #include "wx/image.h"
  25 #include "wx/rawbmp.h"
  26
  27 namespace
  28 {
  29     const int WIDTH = 10;
  30     const int HEIGHT = 10;
  31 }
  32
  33 #define ASSERT_COL_EQUAL(x, y) \
  34     CPPUNIT_ASSERT_EQUAL( (unsigned char)(x), (y) )
  35
  36 // ----------------------------------------------------------------------------
  37 // test class
  38 // ----------------------------------------------------------------------------
  39
  40 class ImageRawTestCase : public CppUnit::TestCase
  41 {
  42 public:
  43     ImageRawTestCase() { }
  44
  45 private:
  46     CPPUNIT_TEST_SUITE( ImageRawTestCase );
  47         CPPUNIT_TEST( RGBImage );
  48     CPPUNIT_TEST_SUITE_END();
  49
  50     void RGBImage();
  51
  52     DECLARE_NO_COPY_CLASS(ImageRawTestCase)
  53 };
  54
  55 CPPUNIT_TEST_SUITE_REGISTRATION( ImageRawTestCase );
  56 CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( ImageRawTestCase, "ImageRawTestCase" );
  57
  58 void ImageRawTestCase::RGBImage()
  59 {
  60     // create a check board image
  61     wxImage image(WIDTH, HEIGHT);
  62
  63     wxImagePixelData data(image);
  64     wxImagePixelData::Iterator p(data);
  65     for ( int y = 0; y < HEIGHT; y++ )
  66     {
  67         const wxImagePixelData::Iterator rowStart = p;
  68
  69         for ( int x = 0; x < WIDTH; x++ )
  70         {
  71             p.Data() = (x + y) % 2 ? 0 : -1;
  72             ++p;
  73         }
  74
  75         p = rowStart;
  76         p.OffsetY(data, 1);
  77     }
  78
  79     // test a few pixels
  80     ASSERT_COL_EQUAL( 0xff, image.GetRed(0, 0) );
  81     ASSERT_COL_EQUAL( 0xff, image.GetBlue(1, 1) );
  82     ASSERT_COL_EQUAL( 0, image.GetGreen(0, 1) );
  83     ASSERT_COL_EQUAL( 0, image.GetGreen(1, 0) );
  84 }