C++ (Cpp) wxImage::Rotate90 Examples

Example #1

File: affinematrix.cpp Project: AaronDP/wxWidgets

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(0, -m_bmpOrig.GetHeight());
        dc.SetTransformMatrix(matrix);
        dc.DrawBitmap(m_bmpOrig, 0, 0);
    }

    CPPUNIT_ASSERT_EQUAL( bmpUsingMatrix.ConvertToImage(),
                          m_imgOrig.Rotate90(true) );
}