Add a command for printing rasterized text

ESCPOS_NET.UnitTest/EmittersBased/EPSONTests/ImageCommandsTests.cs

@@ -0,0 +1,23 @@
+using ESCPOS_NET.Emitters;
+using SixLabors.Fonts;
+using SixLabors.ImageSharp;
+using Xunit;
+
+namespace ESCPOS_NET.UnitTest.EmittersBased.EPSONTests
+{
+    public class ImageCommandsTests
+    {
+        [Fact]
+        public void RasterisesText_Success()
+        {
+            var epson = new EPSON();
+            FontCollection collection = new FontCollection();
+            FontFamily family = collection.Install("c://windows/fonts/arial.ttf");
+
+            byte[] rawImage = epson.PrintRasterizedText("Hello world!", family, 24);
+            var renderedImage = Image.Load(rawImage);
+
+            // compare to a fixture?
+        }
+    }
+}

ESCPOS_NET/ESCPOS_NET.csproj

@@ -27,6 +27,7 @@
 		<PackageReference Include="Microsoft.Extensions.Logging" Version="6.0.0" />
 		<PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="6.0.1" />
 		<PackageReference Include="SixLabors.ImageSharp" Version="2.1.1" />
+		 <PackageReference Include="SixLabors.ImageSharp.Drawing" Version="1.0.0-beta14" />
 		<PackageReference Include="SuperSimpleTcp" Version="2.4.0" />
 		<PackageReference Include="System.IO.Ports" Version="6.0.0" />
 		<PackageReference Include="System.Text.Json" Version="6.0.4" />

ESCPOS_NET/Emitters/BaseCommandEmitter/ImageCommands.cs

@@ -1,7 +1,11 @@
+using System.IO;
 using ESCPOS_NET.Emitters.BaseCommandValues;
 using ESCPOS_NET.Utilities;
+using SixLabors.Fonts;
 using SixLabors.ImageSharp;
 using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Drawing.Processing;
 
 namespace ESCPOS_NET.Emitters
 {
@@ -119,5 +123,23 @@ public virtual byte[] PrintImage(byte[] image, bool isHiDPI, bool isLegacy = fal
                 return ByteSplicer.Combine(SetImageDensity(isHiDPI), BufferImage(image, maxWidth, isLegacy, color), WriteImageFromBuffer());
             }
         }
+
+        public virtual byte[] PrintRasterizedText(string text, FontFamily fontFamily, float size, FontStyle fontStyle = FontStyle.Regular)
+        {
+            var font = fontFamily.CreateFont(size, fontStyle);
+
+            TextOptions textOptions = new TextOptions(font);
+            var rect = TextMeasurer.Measure(text, textOptions);
+
+            Image image = new Image<Rgba32>((int)rect.Width, (int)rect.Height);
+            image.Mutate(x => x.DrawText(text, font, SixLabors.ImageSharp.Color.Black, new PointF(0, 0)));
+
+            var memoryStream = new MemoryStream();
+            image.SaveAsPng(memoryStream);
+            var bytes = memoryStream.ToArray();
+            memoryStream.Dispose();
+
+            return PrintImage(bytes, true);
+        }
     }
 }

ESCPOS_NET/Emitters/ICommandEmitter.cs

@@ -1,3 +1,5 @@
+using SixLabors.Fonts;
+
 namespace ESCPOS_NET.Emitters
 {
     public interface ICommandEmitter
@@ -67,6 +69,8 @@ public interface ICommandEmitter
 
         byte[] PrintImage(byte[] image, bool isHiDPI, bool isLegacy = false, int maxWidth = -1, int color = 1);
 
+        byte[] PrintRasterizedText(string text, FontFamily fontFamily, float size, FontStyle fontStyle = FontStyle.Regular);
+
         /* Status Commands */
         byte[] EnableAutomaticStatusBack();