fixed wxImagePixelData compilation (ticket #3003); added a unit test for it (to be extended to cover more wxImage methods...)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@53852 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

tests/image/rawbmp.cpp

@@ -0,0 +1,84 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        tests/image/rawbmp.cpp
+// Purpose:     Test for using raw bitmap access classes with wxImage
+// Author:      Vadim Zeitlin
+// Created:     2008-05-30
+// RCS-ID:      $Id$
+// Copyright:   (c) 2008 Vadim Zeitlin <vadim@wxwidgets.org>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+#include "testprec.h"
+
+#ifdef __BORLANDC__
+    #pragma hdrstop
+#endif
+
+#ifndef WX_PRECOMP
+#endif // WX_PRECOMP
+
+#include "wx/image.h"
+#include "wx/rawbmp.h"
+
+namespace
+{
+    const int WIDTH = 10;
+    const int HEIGHT = 10;
+}
+
+#define ASSERT_COL_EQUAL(x, y) \
+    CPPUNIT_ASSERT_EQUAL( (unsigned char)(x), (y) )
+
+// ----------------------------------------------------------------------------
+// test class
+// ----------------------------------------------------------------------------
+
+class ImageRawTestCase : public CppUnit::TestCase
+{
+public:
+    ImageRawTestCase() { }
+
+private:
+    CPPUNIT_TEST_SUITE( ImageRawTestCase );
+        CPPUNIT_TEST( RGBImage );
+    CPPUNIT_TEST_SUITE_END();
+
+    void RGBImage();
+
+    DECLARE_NO_COPY_CLASS(ImageRawTestCase)
+};
+
+CPPUNIT_TEST_SUITE_REGISTRATION( ImageRawTestCase );
+CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( ImageRawTestCase, "ImageRawTestCase" );
+
+void ImageRawTestCase::RGBImage()
+{
+    // create a check board image
+    wxImage image(WIDTH, HEIGHT);
+
+    wxImagePixelData data(image);
+    wxImagePixelData::Iterator p(data);
+    for ( int y = 0; y < HEIGHT; y++ )
+    {
+        const wxImagePixelData::Iterator rowStart = p;
+
+        for ( int x = 0; x < WIDTH; x++ )
+        {
+            p.Data() = (x + y) % 2 ? 0 : -1;
+            ++p;
+        }
+
+        p = rowStart;
+        p.OffsetY(data, 1);
+    }
+
+    // test a few pixels
+    ASSERT_COL_EQUAL( 0xff, image.GetRed(0, 0) );
+    ASSERT_COL_EQUAL( 0xff, image.GetBlue(1, 1) );
+    ASSERT_COL_EQUAL( 0, image.GetGreen(0, 1) );
+    ASSERT_COL_EQUAL( 0, image.GetGreen(1, 0) );
+}