How do I make font size of drawstring bigger?

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I've found some source to write an text on image.
But I don't have any knowladge about graphic class.
So can somebody help me to get the font size bigger?
Here is my source code

C#

private void write_text_on_image(string image_path)
        {
            var bmp = Bitmap.FromFile(image_path);
            var newImage = new Bitmap(bmp.Width, bmp.Height + 50);

            var gr = Graphics.FromImage(newImage);
            gr.DrawImageUnscaled(bmp, 0, 0);

            gr.DrawString("This is added text", SystemFonts.DefaultFont, Brushes.Black,
           
                new RectangleF(0, bmp.Height-450, bmp.Width-300, 50));
            string new_img_path = image_path.Replace("_1", "_2");
            newImage.Save(new_img_path);
            newImage.Dispose();
            bmp.Dispose();
            delete_old_img(image_path);
        }

What I have tried:

Used "SystemFonts.CaptionFont" instead of SystemFonts.DefaultFont"

Posted 23-May-16 4:54am

hapiten

Updated 23-May-16 5:11am

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2 solutions

Solution 2

Try to create your own font. See Font Class (System.Drawing)[^]

Preferably you have a private member variable and create the object in the constructor.

C#

private Font myFont;

public MyClassName()
{
    myFont = new Font("Arial", 14.0F, FontStyle.Bold);
}

C#

private void write_text_on_image(string image_path)
{
...
    gr.DrawString("This is added text", myFont, Brushes.Black, ...);
...
}

Posted 23-May-16 5:11am

George Jonsson

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F-ES Sitecore · Accepted Answer · 2016-05-23T05:09:00

Solution 1

Rather than DefaultFont create a Font of the family and size you want

C#

Font f = new Font(new FontFamily("Verdana"), 10);

And use that font object (f) in DrawString instead of DefaultFont

Posted 23-May-16 5:09am

F-ES Sitecore

Comments

hapiten 23-May-16 21:21pm

Thank you very much