EmfRecorderGraphics2D.FromEmfImage

EmfRecorderGraphics2D.FromEmfImage method

Gets an instance of the EmfRecorderGraphics2D containing all records from the Emf image.

public static EmfRecorderGraphics2D FromEmfImage(EmfImage emfImage)
ParameterTypeDescription
emfImageEmfImageThe Emf image to read records from.

Return Value

An instance of the EmfRecorderGraphics2D

Examples

This example shows how to load a EMF image from a file and draw a text string over it.

[C#]

string dir = "c:\\temp\\";

using (Aspose.Imaging.FileFormats.Emf.EmfImage emfImage = (Aspose.Imaging.FileFormats.Emf.EmfImage)Aspose.Imaging.Image.Load(dir + "test.emf"))
{
    Aspose.Imaging.FileFormats.Emf.Graphics.EmfRecorderGraphics2D graphics =
        Aspose.Imaging.FileFormats.Emf.Graphics.EmfRecorderGraphics2D.FromEmfImage(emfImage);

    // First, get the image size
    int width = emfImage.Width;
    int height = emfImage.Height;

    // Second, calculate a transformation to put a text string along the main diagonal of the image -
    // from the upper-left to the bootom-right corner.
    float emFontSize = 96f;
    float d = (float)System.Math.Sqrt(width * width + height * height);
    float scaleFactor = d / (emFontSize * 5f);

    float tan = ((float)height) / width;                
    double radians = System.Math.Atan(tan);
    double degrees = (180 * radians) / System.Math.PI;

    Aspose.Imaging.Matrix transform = new Aspose.Imaging.Matrix();
    transform.Rotate((float)degrees);
    transform.Scale(scaleFactor, scaleFactor);

    // Then, set the transform.
    graphics.SetTransform(transform);

    // Finally, put a watermark (text string of pink color) along the main diagonal.
    graphics.DrawString("WATERMARK", new Aspose.Imaging.Font("Courier New", emFontSize), Aspose.Imaging.Color.LightPink, 0, 0/*, (float)degrees*/);

    // Save the image with watermark to another EMF file.
    using (Aspose.Imaging.FileFormats.Emf.EmfImage scaledEmfImage = graphics.EndRecording())
    {
        scaledEmfImage.Save(dir + "test.scaled.emf");
    }
}

See Also

EmfRecorderGraphics2D.EmfRecorderGraphics2D EmfRecorderGraphics2D.BackgroundMode