+#if wxUSE_GRAPHICS_CONTEXT
+void AffineTransformTestCase::CompareToGraphicsContext()
+{
+ wxPoint2DDouble pointA1(1.0, 3.0), pointA2(60.0, 50.0),
+ pointG1(1.0, 3.0), pointG2(60.0, 50.0);
+
+ // Create affine matrix and transform it
+ wxAffineMatrix2D matrixA1, matrixA2;
+ matrixA2.Rotate(M_PI / 3);
+ matrixA1.Translate(-m_bmpOrig.GetWidth()/2, -m_bmpOrig.GetHeight()/2);
+ matrixA1.Rotate(-M_PI *2/ 6);
+ matrixA1.Translate(m_bmpOrig.GetWidth()/2, m_bmpOrig.GetHeight()/2);
+ matrixA1.Mirror(wxHORIZONTAL);
+ matrixA1.Concat(matrixA2);
+ matrixA1.Mirror(wxVERTICAL);
+ matrixA1.Translate(m_bmpOrig.GetWidth()/2, -m_bmpOrig.GetHeight()/2);
+ matrixA1.Scale(0.9, 0.9);
+ matrixA1.Invert();
+
+ // Create image using first matrix
+ wxBitmap bmpUsingMatrixA1(m_bmpOrig.GetHeight(), m_bmpOrig.GetWidth());
+
+ // Build the transformed image using the transformation matrix
+ {
+ wxMemoryDC dc(bmpUsingMatrixA1);
+
+ if ( !dc.CanUseTransformMatrix() )
+ return;
+
+ // Draw the bitmap
+ dc.SetTransformMatrix(matrixA1);
+ dc.DrawBitmap(m_bmpOrig, 0, 0);
+
+ // Draw a line
+ matrixA1.TransformPoint(&pointA1.m_x, &pointA1.m_y);
+ matrixA1.TransformDistance(&pointA2.m_x, &pointA2.m_y);
+
+ dc.DrawLine(wxRound(pointA1.m_x), wxRound(pointA1.m_y),
+ wxRound(pointA1.m_x + pointA2.m_x), wxRound(pointA1.m_x + pointA2.m_y));
+ }
+
+
+ // Create graphics matrix and transform it
+ wxMemoryDC mDc;
+ wxGraphicsContext* gDc = wxGraphicsContext::Create(mDc);
+ wxGraphicsMatrix matrixG1 = gDc->CreateMatrix();
+ wxGraphicsMatrix matrixG2 = gDc->CreateMatrix();
+ matrixG2.Rotate(M_PI / 3);
+ matrixG1.Translate(-m_bmpOrig.GetWidth()/2, -m_bmpOrig.GetHeight()/2);
+ matrixG1.Rotate(-M_PI*2 / 6);
+ matrixG1.Translate(m_bmpOrig.GetWidth()/2, m_bmpOrig.GetHeight()/2);
+ matrixG1.Scale(-1, 1);
+ matrixG1.Concat(matrixG2);
+ matrixG1.Scale(1, -1);
+ matrixG1.Translate(m_bmpOrig.GetWidth()/2, -m_bmpOrig.GetHeight()/2);
+ matrixG1.Scale(0.9, 0.9);
+ matrixG1.Invert();
+ // Create affine matrix from the graphics matrix
+ wxMatrix2D mat2D;
+ wxPoint2DDouble tr;
+ matrixG1.Get(&mat2D.m_11, &mat2D.m_12, &mat2D.m_21, &mat2D.m_22, &tr.m_x, &tr.m_y);
+ wxAffineMatrix2D matrixAG;
+ matrixAG.Set(mat2D, tr);
+
+ delete gDc;
+
+ // Create image using last matrix
+ wxBitmap bmpUsingMatrixAG(m_bmpOrig.GetHeight(), m_bmpOrig.GetWidth());
+
+ // Build the transformed image using the transformation matrix
+ {
+ wxMemoryDC dc(bmpUsingMatrixAG);
+
+ if ( !dc.CanUseTransformMatrix() )
+ return;
+
+ // Draw the bitmap
+ dc.SetTransformMatrix(matrixAG);
+ dc.DrawBitmap(m_bmpOrig, 0, 0);
+
+ // Draw a line
+ matrixG1.TransformPoint(&pointG1.m_x, &pointG1.m_y);
+ matrixG1.TransformDistance(&pointG2.m_x, &pointG2.m_y);
+
+ dc.DrawLine(wxRound(pointG1.m_x), wxRound(pointG1.m_y),
+ wxRound(pointG1.m_x + pointG2.m_x), wxRound(pointG1.m_x + pointG2.m_y));
+ }
+
+
+ CPPUNIT_ASSERT_EQUAL( bmpUsingMatrixA1.ConvertToImage(),
+ bmpUsingMatrixAG.ConvertToImage() );
+
+ // Save the images to check that something _is_ inside the visible area.
+ //bmpUsingMatrixA1.SaveFile("matrixA1.jpg", wxBITMAP_TYPE_JPEG);
+ //bmpUsingMatrixAG.SaveFile("matrixAG.jpg", wxBITMAP_TYPE_JPEG);
+}
+#endif // wxUSE_GRAPHICS_CONTEXT
+