Add a unit test for wxAffineMatrix2D class and its support in wxDC.

Verify that applying a world transformation to wxDC really does result in the
expected transformation.

See #13092.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67617 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

tests/Makefile.in

@@ -155,6 +155,7 @@ TEST_GUI_OBJECTS =  \
 	test_gui_colour.o \
 	test_gui_ellipsization.o \
 	test_gui_measuring.o \
+	test_gui_affinematrix.o \
 	test_gui_config.o \
 	test_gui_bitmapcomboboxtest.o \
 	test_gui_bitmaptogglebuttontest.o \
@@ -696,6 +697,9 @@ test_gui_ellipsization.o: $(srcdir)/graphics/ellipsization.cpp $(TEST_GUI_ODEP)
 test_gui_measuring.o: $(srcdir)/graphics/measuring.cpp $(TEST_GUI_ODEP)
 	$(CXXC) -c -o $@ $(TEST_GUI_CXXFLAGS) $(srcdir)/graphics/measuring.cpp
 
+test_gui_affinematrix.o: $(srcdir)/graphics/affinematrix.cpp $(TEST_GUI_ODEP)
+	$(CXXC) -c -o $@ $(TEST_GUI_CXXFLAGS) $(srcdir)/graphics/affinematrix.cpp
+
 test_gui_config.o: $(srcdir)/config/config.cpp $(TEST_GUI_ODEP)
 	$(CXXC) -c -o $@ $(TEST_GUI_CXXFLAGS) $(srcdir)/config/config.cpp
 

tests/graphics/affinematrix.cpp

@@ -0,0 +1,140 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        tests/graphics/affinetransform.cpp
+// Purpose:     Unit test for transformations implemented for wxAffineMatrix2D
+// Author:      Catalin Raceanu
+// Created:     2011-04-14
+// Copyright:   (c) 2011 wxWidgets development team
+///////////////////////////////////////////////////////////////////////////////
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+#include "testprec.h"
+
+#ifdef __BORLANDC__
+    #pragma hdrstop
+#endif
+
+#include "wx/dcmemory.h"
+#include "wx/affinematrix2d.h"
+#include "wx/math.h"
+
+#include "testimage.h"
+
+// ----------------------------------------------------------------------------
+// test class
+// ----------------------------------------------------------------------------
+
+class AffineTransformTestCase : public CppUnit::TestCase
+{
+public:
+    AffineTransformTestCase()
+    {
+        wxImage::AddHandler(new wxJPEGHandler);
+    }
+
+    virtual void setUp();
+
+private:
+    CPPUNIT_TEST_SUITE( AffineTransformTestCase );
+        CPPUNIT_TEST( InvertMatrix );
+        CPPUNIT_TEST( VMirrorAndTranslate );
+        CPPUNIT_TEST( Rotate90Clockwise );
+    CPPUNIT_TEST_SUITE_END();
+
+    void InvertMatrix();
+    void VMirrorAndTranslate();
+    void Rotate90Clockwise();
+
+    wxImage m_imgOrig;
+    wxBitmap m_bmpOrig;
+
+    DECLARE_NO_COPY_CLASS(AffineTransformTestCase)
+};
+
+// register in the unnamed registry so that these tests are run by default
+CPPUNIT_TEST_SUITE_REGISTRATION( AffineTransformTestCase );
+
+// also include in it's own registry so that these tests can be run alone
+CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( AffineTransformTestCase, "AffineTransformTestCase" );
+
+void AffineTransformTestCase::setUp()
+{
+    m_imgOrig.LoadFile("horse.jpg");
+
+    CPPUNIT_ASSERT( m_imgOrig.IsOk() );
+
+    m_bmpOrig = wxBitmap(m_imgOrig);
+}
+
+void AffineTransformTestCase::InvertMatrix()
+{
+    wxAffineMatrix2D matrix1;
+    matrix1.Set(wxMatrix2D(2, 1, 1, 1), wxPoint2DDouble(1, 1));
+
+    wxAffineMatrix2D matrix2(matrix1);
+
+    matrix2.Invert();
+
+    wxMatrix2D m;
+    wxPoint2DDouble p;
+    matrix2.Get(&m, &p);
+    CPPUNIT_ASSERT_EQUAL( 1, (int)m.m_11 );
+    CPPUNIT_ASSERT_EQUAL( -1, (int)m.m_12 );
+    CPPUNIT_ASSERT_EQUAL( -1, (int)m.m_21 );
+    CPPUNIT_ASSERT_EQUAL( 2, (int)m.m_22 );
+    CPPUNIT_ASSERT_EQUAL( 0, (int)p.m_x );
+    CPPUNIT_ASSERT_EQUAL( -1, (int)p.m_y );
+
+    matrix2.Concat(matrix1);
+    CPPUNIT_ASSERT( matrix2.IsIdentity() );
+}
+
+void AffineTransformTestCase::VMirrorAndTranslate()
+{
+    wxBitmap bmpUsingMatrix(m_bmpOrig.GetWidth(), m_bmpOrig.GetHeight());
+
+    // build the mirrored image using the transformation matrix
+    {
+        wxMemoryDC dc(bmpUsingMatrix);
+
+        if ( !dc.CanUseTransformMatrix() )
+            return;
+
+        wxAffineMatrix2D matrix;
+        matrix.Mirror(wxVERTICAL);
+        matrix.Translate(0, m_bmpOrig.GetHeight() - 1);
+        dc.SetTransformMatrix(matrix);
+        dc.DrawBitmap(m_bmpOrig, 0, 0);
+    }
+
+    wxImage imgUsingMatrix = bmpUsingMatrix.ConvertToImage();
+    wxImage imgOrigVMirrored = m_imgOrig.Mirror(false);
+
+    CPPUNIT_ASSERT_EQUAL( imgUsingMatrix, imgOrigVMirrored );
+}
+
+void AffineTransformTestCase::Rotate90Clockwise()
+{
+    wxBitmap bmpUsingMatrix(m_bmpOrig.GetHeight(), m_bmpOrig.GetWidth());
+
+    // build the rotated image using the transformation matrix
+    {
+        wxMemoryDC dc(bmpUsingMatrix);
+
+        if ( !dc.CanUseTransformMatrix() )
+            return;
+
+        wxAffineMatrix2D matrix;
+        matrix.Rotate(-0.5 * M_PI);
+        matrix.Translate(m_bmpOrig.GetHeight(), 0);
+        dc.SetTransformMatrix(matrix);
+        dc.DrawBitmap(m_bmpOrig, 0, 0);
+    }
+
+    wxImage imgUsingMatrix = bmpUsingMatrix.ConvertToImage();
+    wxImage imgOrigRotate90Clockwise = m_imgOrig.Rotate90(true);
+
+    CPPUNIT_ASSERT_EQUAL( imgUsingMatrix, imgOrigRotate90Clockwise );
+}

tests/makefile.bcc

@@ -140,6 +140,7 @@ TEST_GUI_OBJECTS =  \
 	$(OBJS)\test_gui_colour.obj \
 	$(OBJS)\test_gui_ellipsization.obj \
 	$(OBJS)\test_gui_measuring.obj \
+	$(OBJS)\test_gui_affinematrix.obj \
 	$(OBJS)\test_gui_config.obj \
 	$(OBJS)\test_gui_bitmapcomboboxtest.obj \
 	$(OBJS)\test_gui_bitmaptogglebuttontest.obj \
@@ -744,6 +745,9 @@ $(OBJS)\test_gui_ellipsization.obj: .\graphics\ellipsization.cpp
 $(OBJS)\test_gui_measuring.obj: .\graphics\measuring.cpp
 	$(CXX) -q -c -P -o$@ $(TEST_GUI_CXXFLAGS) .\graphics\measuring.cpp
 
+$(OBJS)\test_gui_affinematrix.obj: .\graphics\affinematrix.cpp
+	$(CXX) -q -c -P -o$@ $(TEST_GUI_CXXFLAGS) .\graphics\affinematrix.cpp
+
 $(OBJS)\test_gui_config.obj: .\config\config.cpp
 	$(CXX) -q -c -P -o$@ $(TEST_GUI_CXXFLAGS) .\config\config.cpp
 

tests/makefile.gcc

@@ -133,6 +133,7 @@ TEST_GUI_OBJECTS =  \
 	$(OBJS)\test_gui_colour.o \
 	$(OBJS)\test_gui_ellipsization.o \
 	$(OBJS)\test_gui_measuring.o \
+	$(OBJS)\test_gui_affinematrix.o \
 	$(OBJS)\test_gui_config.o \
 	$(OBJS)\test_gui_bitmapcomboboxtest.o \
 	$(OBJS)\test_gui_bitmaptogglebuttontest.o \
@@ -725,6 +726,9 @@ $(OBJS)\test_gui_ellipsization.o: ./graphics/ellipsization.cpp
 $(OBJS)\test_gui_measuring.o: ./graphics/measuring.cpp
 	$(CXX) -c -o $@ $(TEST_GUI_CXXFLAGS) $(CPPDEPS) $<
 
+$(OBJS)\test_gui_affinematrix.o: ./graphics/affinematrix.cpp
+	$(CXX) -c -o $@ $(TEST_GUI_CXXFLAGS) $(CPPDEPS) $<
+
 $(OBJS)\test_gui_config.o: ./config/config.cpp
 	$(CXX) -c -o $@ $(TEST_GUI_CXXFLAGS) $(CPPDEPS) $<
 

tests/makefile.vc

@@ -135,6 +135,7 @@ TEST_GUI_OBJECTS =  \
 	$(OBJS)\test_gui_colour.obj \
 	$(OBJS)\test_gui_ellipsization.obj \
 	$(OBJS)\test_gui_measuring.obj \
+	$(OBJS)\test_gui_affinematrix.obj \
 	$(OBJS)\test_gui_config.obj \
 	$(OBJS)\test_gui_bitmapcomboboxtest.obj \
 	$(OBJS)\test_gui_bitmaptogglebuttontest.obj \
@@ -870,6 +871,9 @@ $(OBJS)\test_gui_ellipsization.obj: .\graphics\ellipsization.cpp
 $(OBJS)\test_gui_measuring.obj: .\graphics\measuring.cpp
 	$(CXX) /c /nologo /TP /Fo$@ $(TEST_GUI_CXXFLAGS) .\graphics\measuring.cpp
 
+$(OBJS)\test_gui_affinematrix.obj: .\graphics\affinematrix.cpp
+	$(CXX) /c /nologo /TP /Fo$@ $(TEST_GUI_CXXFLAGS) .\graphics\affinematrix.cpp
+
 $(OBJS)\test_gui_config.obj: .\config\config.cpp
 	$(CXX) /c /nologo /TP /Fo$@ $(TEST_GUI_CXXFLAGS) .\config\config.cpp
 

tests/makefile.wat

@@ -379,6 +379,7 @@ TEST_GUI_OBJECTS =  &
 	$(OBJS)\test_gui_colour.obj &
 	$(OBJS)\test_gui_ellipsization.obj &
 	$(OBJS)\test_gui_measuring.obj &
+	$(OBJS)\test_gui_affinematrix.obj &
 	$(OBJS)\test_gui_config.obj &
 	$(OBJS)\test_gui_bitmapcomboboxtest.obj &
 	$(OBJS)\test_gui_bitmaptogglebuttontest.obj &
@@ -784,6 +785,9 @@ $(OBJS)\test_gui_ellipsization.obj :  .AUTODEPEND .\graphics\ellipsization.cpp
 $(OBJS)\test_gui_measuring.obj :  .AUTODEPEND .\graphics\measuring.cpp
 	$(CXX) -bt=nt -zq -fo=$^@ $(TEST_GUI_CXXFLAGS) $<
 
+$(OBJS)\test_gui_affinematrix.obj :  .AUTODEPEND .\graphics\affinematrix.cpp
+	$(CXX) -bt=nt -zq -fo=$^@ $(TEST_GUI_CXXFLAGS) $<
+
 $(OBJS)\test_gui_config.obj :  .AUTODEPEND .\config\config.cpp
 	$(CXX) -bt=nt -zq -fo=$^@ $(TEST_GUI_CXXFLAGS) $<
 

tests/test.bkl

@@ -136,6 +136,7 @@
             graphics/colour.cpp
             graphics/ellipsization.cpp
             graphics/measuring.cpp
+            graphics/affinematrix.cpp
             config/config.cpp
             controls/bitmapcomboboxtest.cpp
             controls/bitmaptogglebuttontest.cpp

tests/test_test_gui.dsp

@@ -239,6 +239,10 @@ SOURCE=.\menu\accelentry.cpp
 # End Source File
 # Begin Source File
 
+SOURCE=.\graphics\affinematrix.cpp
+# End Source File
+# Begin Source File
+
 SOURCE=.\asserthelper.cpp
 # End Source File
 # Begin Source File

tests/test_vc7_test_gui.vcproj

@@ -569,6 +569,9 @@
 				RelativePath=".\menu\accelentry.cpp">
 			</File>
 			<File
+				RelativePath=".\graphics\affinematrix.cpp">
+			</File>
+			<File
 				RelativePath=".\asserthelper.cpp">
 			</File>
 			<File

tests/test_vc8_test_gui.vcproj

@@ -832,6 +832,10 @@
 				>
 			</File>
 			<File
+				RelativePath=".\graphics\affinematrix.cpp"
+				>
+			</File>
+			<File
 				RelativePath=".\asserthelper.cpp"
 				>
 			</File>

tests/test_vc9_test_gui.vcproj

@@ -804,6 +804,10 @@
 				>
 			</File>
 			<File
+				RelativePath=".\graphics\affinematrix.cpp"
+				>
+			</File>
+			<File
 				RelativePath=".\asserthelper.cpp"
 				>
 			</File>