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