Legacy ImageMagick Discussions Archive

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using ImageMagick;

namespace TextToPicture
{
    class Slideshow
    {
        static void Main(string[] args)
        {
            using (var image = new MagickImage(MagickColors.White, 320, 240))
            {
                image.Density = new Density(300);
                image.Format = MagickFormat.Png;

                using (var gradient = new MagickImage(@"D:\gradient.png", 320, 240))
                    image.Composite(gradient, 0, 0, CompositeOperator.Over);

                using (var completeMask = new MagickImage(MagickColors.Transparent, 310, 30))
                {
                    using (var filledMask = new MagickImage(MagickColors.White, 310, 30))
                        completeMask.Composite(filledMask, 0, 0, CompositeOperator.Over);

                    using (var mText = new MagickImage(MagickColors.Transparent, 310, 30))
                    {
                        var textSettings = new MagickReadSettings
                        {
                            BackgroundColor = MagickColors.Transparent,
                            Width = 310,
                            Height = 30,
                            TextGravity = Gravity.North
                        };

                        mText.Read($"caption:Hello World!", textSettings);

                        using (var completeTextBox = new MagickImage(MagickColors.Transparent, 310, 30))
                        {
                            completeTextBox.Composite(mText, 0, 0, CompositeOperator.Over);
                            completeTextBox.Composite(completeMask, 0, 0);

                            image.Composite(completeTextBox, 5, 60, CompositeOperator.Dissolve, "100");
                        }
                    }
                }
                image.Write(@"D:\test.png");
            }
        }
    }
}

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completeTextBox.Composite(completeMask, 0, 0);

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completeTextBox.Composite(completeMask, 0, 0, CompositeOperator.Multiply);