#26 add missing operation and expose the content stream directly to the user through the page

src/UglyToad.PdfPig/Graphics/Operations/SpecialGraphicsState/SetGraphicsStateOperatorsFromDictionary.cs

@@ -0,0 +1,54 @@
+namespace UglyToad.PdfPig.Graphics.Operations.SpecialGraphicsState
+{
+    using System.IO;
+    using Tokens;
+
+    /// <inheritdoc />
+    /// <summary>
+    ///  Set the specified parameters in the graphics state using the ExtGState subdictionary with the given name.
+    /// </summary>
+    public class SetGraphicsStateParametersFromDictionary : IGraphicsStateOperation
+    {
+        /// <summary>
+        /// The symbol for this operation in a stream.
+        /// </summary>
+        public const string Symbol = "gs";
+
+        /// <inheritdoc />
+        public string Operator => Symbol;
+
+        /// <summary>
+        /// The name of a graphics state parameter dictionary in the ExtGState subdictionary of the current resource dictionary.
+        /// </summary>
+        public NameToken Name { get; }
+
+        /// <summary>
+        /// Create a new <see cref="SetGraphicsStateParametersFromDictionary"/>.
+        /// </summary>
+        /// <param name="name">The name of the ExtGState dictionary.</param>
+        public SetGraphicsStateParametersFromDictionary(NameToken name)
+        {
+            Name = name;
+        }
+
+        /// <inheritdoc />
+        public void Run(IOperationContext operationContext)
+        {
+        }
+
+        /// <inheritdoc />
+        public void Write(Stream stream)
+        {
+            stream.WriteText($"/{Name.Data}");
+            stream.WriteWhiteSpace();
+            stream.WriteText(Symbol);
+            stream.WriteNewLine();
+        }
+
+        /// <inheritdoc />
+        public override string ToString()
+        {
+            return $"{Name} {Symbol}";
+        }
+    }
+}