ArtifexSoftware · MaksymTkachuk · Dec 5, 2025
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -0,0 +1,8 @@
+# Changelog
+
+### [1.3.2-rc.3] - 2025-12-05
+- Converted from System.Drawing.Bitmap to SkiaSharp.SKBitmap for cross-platform support
+- Replaced System.Drawing.Common package with SkiaSharp (2.88.8)
+- Updated memory operations to work on both Windows and Linux
+- Fixed color accuracy by correctly handling BGR format from Ghostscript
+- Updated platform-specific structures for Linux compatibility
diff --git a/Ghostscript.NET.DisplayTest/FMain.cs b/Ghostscript.NET.DisplayTest/FMain.cs
@@ -9,6 +9,8 @@
 using Ghostscript.NET;
 using Ghostscript.NET.Viewer;
 using Ghostscript.NET.Interpreter;
+using SkiaSharp;
+using SkiaSharp.Views.Desktop;
 
 namespace Ghostscript.NET.DisplayTest
 {
@@ -17,6 +19,7 @@ public partial class FMain : Form
         private GhostscriptViewer _viewer;
         private FPreview _preview = new FPreview();
         private StdIOHandler _stdioHandler;
+        private SKBitmap _currentBitmap = null;
 
         public FMain()
         {
@@ -48,19 +51,17 @@ private void FMain_Load(object sender, EventArgs e)
 
         void _viewer_DisplayPage(object sender, GhostscriptViewerViewEventArgs e)
         {
-            _preview.pbDisplay.Invalidate();
-            _preview.pbDisplay.Update();            
+            _preview.UpdateImage(e.Image);
         }
 
         void _viewer_DisplayUpdate(object sender, GhostscriptViewerViewEventArgs e)
         {
-            _preview.pbDisplay.Invalidate();
-            _preview.pbDisplay.Update();
+            _preview.UpdateImage(e.Image);
         }
 
         void _viewer_DisplaySize(object sender, GhostscriptViewerViewEventArgs e)
         {
-            _preview.pbDisplay.Image = e.Image;
+            _preview.UpdateImage(e.Image);
         }
 
         private void btnRun_Click(object sender, EventArgs e)

diff --git a/Ghostscript.NET.DisplayTest/FPreview.Designer.cs b/Ghostscript.NET.DisplayTest/FPreview.Designer.cs
diff --git a/Ghostscript.NET.DisplayTest/FPreview.cs b/Ghostscript.NET.DisplayTest/FPreview.cs
@@ -6,22 +6,77 @@
 using System.Linq;
 using System.Text;
 using System.Windows.Forms;
+using SkiaSharp;
+using SkiaSharp.Views.Desktop;
 
 namespace Ghostscript.NET.DisplayTest
 {
     public partial class FPreview : Form
     {
+        private SKBitmap _currentBitmap = null;
+
         public FPreview()
         {
             InitializeComponent();
 
             this.Left = 0;
             this.Top = 0;
+
+            pbDisplay.PaintSurface += PbDisplay_PaintSurface;
+        }
+
+        private void PbDisplay_PaintSurface(object sender, SKPaintSurfaceEventArgs e)
+        {
+            var canvas = e.Surface.Canvas;
+            canvas.Clear(SKColors.White);
+
+            if (_currentBitmap != null)
+            {
+                var destRect = SKRect.Create(pbDisplay.Width, pbDisplay.Height);
+                var sourceRect = SKRect.Create(_currentBitmap.Width, _currentBitmap.Height);
+                canvas.DrawBitmap(_currentBitmap, sourceRect, destRect);
+            }
+        }
+
+        public void UpdateImage(SKBitmap bitmap)
+        {
+            _currentBitmap = bitmap;
+            ResizeCanvas(bitmap);
+            RefreshCanvas();
         }
 
         private void FPreview_Load(object sender, EventArgs e)
         {
 
         }
+
+        private void ResizeCanvas(SKBitmap bitmap)
+        {
+            if (bitmap == null)
+            {
+                return;
+            }
+
+            if (pbDisplay.Width == bitmap.Width && pbDisplay.Height == bitmap.Height)
+            {
+                return;
+            }
+
+            pbDisplay.SuspendLayout();
+            pbDisplay.Width = bitmap.Width;
+            pbDisplay.Height = bitmap.Height;
+            pbDisplay.ResumeLayout();
+        }
+
+        private void RefreshCanvas()
+        {
+            if (!pbDisplay.IsHandleCreated)
+            {
+                return;
+            }
+
+            pbDisplay.Invalidate();
+            pbDisplay.Update();
+        }
     }
 }
diff --git a/Ghostscript.NET.DisplayTest/Ghostscript.NET.DisplayTest.csproj b/Ghostscript.NET.DisplayTest/Ghostscript.NET.DisplayTest.csproj
@@ -1,8 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFramework>net6.0-windows</TargetFramework>
-    <Platform Condition=" '$(Platform)' == '' ">x86</Platform>
-    <OutputType>WinExe</OutputType>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <OutputType>Exe</OutputType>
+    <Platforms>AnyCPU;x64</Platforms>
     <SccProjectName>
     </SccProjectName>
     <SccLocalPath>
@@ -34,4 +35,8 @@
   <ItemGroup>
     <Content Include="_res\ghostscript-dotnet.png" />
   </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="SkiaSharp" Version="2.88.8" />
+    <PackageReference Include="SkiaSharp.Views.WindowsForms" Version="2.88.8" />
+  </ItemGroup>
 </Project>
diff --git a/Ghostscript.NET.Samples/Program.cs b/Ghostscript.NET.Samples/Program.cs
@@ -24,10 +24,13 @@
 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
-using System;
-using System.Collections.Generic;
 using Ghostscript.NET;
+using Ghostscript.NET.Rasterizer;
 using Ghostscript.NET.Samples;
+using SkiaSharp;
+using System;
+using System.Collections.Generic;
+using System.IO;
 
 Console.WriteLine("Ghostscript.NET Samples");
 
@@ -58,4 +61,26 @@
     Console.WriteLine($"Sample '{sample.GetType().Name}' run successful!");
 }
 
-Console.ReadLine();
+GhostscriptVersionInfo lastVersion = GhostscriptVersionInfo.GetLastInstalledVersion();
+
+using (var rasterizer = new GhostscriptRasterizer())
+{
+    rasterizer.Open(@"e:\Tmp\test.pdf", lastVersion, false);
+
+    for (var pageNumber = 1; pageNumber <= rasterizer.PageCount; pageNumber++)
+    {
+        var pageFilePath = Path.Combine(@"e:\Tmp\", string.Format("SkisSharp-{0}.png", pageNumber));
+
+        var img = rasterizer.GetPage(300, pageNumber);
+        using (var image = SKImage.FromBitmap(img))
+        using (var data = image.Encode(SKEncodedImageFormat.Png, 100))
+        using (var stream = File.OpenWrite(pageFilePath))
+        {
+            data.SaveTo(stream);
+        }
+
+        Console.WriteLine(pageFilePath);
+    }
+}
+
+Console.ReadKey();
diff --git a/Ghostscript.NET.Samples/Samples/RasterizerCropSample.cs b/Ghostscript.NET.Samples/Samples/RasterizerCropSample.cs
@@ -25,9 +25,8 @@
 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 using System;
-using System.Drawing;
-using System.Drawing.Imaging;
 using System.IO;
+using SkiaSharp;
 
 // required Ghostscript.NET namespaces
 using Ghostscript.NET;
@@ -63,8 +62,16 @@ public void Start()
                 {
                     string pageFilePath = Path.Combine(outputPath, "Page-" + pageNumber.ToString() + ".png");
 
-                    Image img = rasterizer.GetPage(desired_dpi, pageNumber);
-                    img.Save(pageFilePath, ImageFormat.Png);
+                    SKBitmap img = rasterizer.GetPage(desired_dpi, pageNumber);
+                    if (img != null)
+                    {
+                        using (var image = SKImage.FromBitmap(img))
+                        using (var data = image.Encode(SKEncodedImageFormat.Png, 100))
+                        using (var stream = File.OpenWrite(pageFilePath))
+                        {
+                            data.SaveTo(stream);
+                        }
+                    }
 
                     Console.WriteLine(pageFilePath);
                 }

diff --git a/Ghostscript.NET.Samples/Samples/RasterizerSample1.cs b/Ghostscript.NET.Samples/Samples/RasterizerSample1.cs
@@ -30,6 +30,7 @@
 using System.IO;
 using Ghostscript.NET.Rasterizer;
 using Ghostscript.NET.Samples.StdIOHandlers;
+using SkiaSharp;
 
 namespace Ghostscript.NET.Samples
 {
@@ -64,7 +65,15 @@ public void Sample1()
                     var pageFilePath = Path.Combine(outputPath, string.Format("Page-{0}.png", pageNumber));
 
                     var img = rasterizer.GetPage(desired_dpi, pageNumber);
-                    img.Save(pageFilePath, ImageFormat.Png);
+                    if (img != null)
+                    {
+                        using (var image = SKImage.FromBitmap(img))
+                        using (var data = image.Encode(SKEncodedImageFormat.Png, 100))
+                        using (var stream = File.OpenWrite(pageFilePath))
+                        {
+                            data.SaveTo(stream);
+                        }
+                    }
 
                     Console.WriteLine(pageFilePath);
                 }
@@ -92,7 +101,15 @@ public void Sample2()
                     var pageFilePath = Path.Combine(outputPath, string.Format("Page-{0}.png", pageNumber));
 
                     var img = rasterizer.GetPage(desired_dpi, pageNumber);
-                    img.Save(pageFilePath, ImageFormat.Png);
+                    if (img != null)
+                    {
+                        using (var image = SKImage.FromBitmap(img))
+                        using (var data = image.Encode(SKEncodedImageFormat.Png, 100))
+                        using (var stream = File.OpenWrite(pageFilePath))
+                        {
+                            data.SaveTo(stream);
+                        }
+                    }
 
                     Console.WriteLine(pageFilePath);
                 }

diff --git a/Ghostscript.NET.Samples/Samples/RasterizerSample2.cs b/Ghostscript.NET.Samples/Samples/RasterizerSample2.cs
@@ -32,6 +32,7 @@
 // required Ghostscript.NET namespaces
 using Ghostscript.NET;
 using Ghostscript.NET.Rasterizer;
+using SkiaSharp;
 
 namespace Ghostscript.NET.Samples
 {
@@ -67,8 +68,16 @@ public void Start()
                 {
                     string pageFilePath = Path.Combine(outputPath, "Page-" + pageNumber.ToString() + ".png");
 
-                    Image img = rasterizer.GetPage(desired_dpi, pageNumber);
-                    img.Save(pageFilePath, ImageFormat.Png);
+                    var img = rasterizer.GetPage(desired_dpi, pageNumber);
+                    if (img != null)
+                    {
+                        using (var image = SKImage.FromBitmap(img))
+                        using (var data = image.Encode(SKEncodedImageFormat.Png, 100))
+                        using (var stream = File.OpenWrite(pageFilePath))
+                        {
+                            data.SaveTo(stream);
+                        }
+                    }
 
                     Console.WriteLine(pageFilePath);
                 }

diff --git a/Ghostscript.NET.Samples/Samples/ViewerSample.cs b/Ghostscript.NET.Samples/Samples/ViewerSample.cs
@@ -26,7 +26,7 @@
 
 using System;
 using System.Collections.Generic;
-using System.Drawing;
+using SkiaSharp;
 
 // required Ghostscript.NET namespaces
 using Ghostscript.NET;
@@ -38,7 +38,7 @@ public class ViewerSample : ISample
     {
         private GhostscriptVersionInfo _lastInstalledVersion = null;
         private GhostscriptViewer _viewer = null;
-        private Bitmap _pdfPage = null;
+        private SKBitmap _pdfPage = null;
 
         public void Start()
         {
@@ -92,7 +92,7 @@ void _viewer_DisplayUpdate(object sender, GhostscriptViewerViewEventArgs e)
             // it by calling PictureBox.Invalidate() and PictureBox.Update()
             // methods. We dont need to set image reference again because
             // Ghostscript.NET is changing Image object directly in the
-            // memory and does not create new Bitmap instance.
+            // memory and does not create new SKBitmap instance.
         }
 
         // this is the last raised event after complete page is rasterized