From 5126980e97b5c91286fc14667db43896be988a4f Mon Sep 17 00:00:00 2001
From: Darth Affe <darthaffe@wyrez.org>
Date: Mon, 15 Jul 2024 00:00:58 +0200
Subject: [PATCH] Added extensions for SkiaSharp

---
 HPPH.Benchmark/HPPH.Benchmark.csproj |  1 +
 HPPH.SkiaSharp/HPPH.SkiaSharp.csproj | 18 ++++++++++++++++
 HPPH.SkiaSharp/ImageExtension.cs     | 32 ++++++++++++++++++++++++++++
 HPPH.SkiaSharp/ImageHelper.cs        | 18 ++++++++++++++++
 HPPH.sln                             |  8 ++++++-
 5 files changed, 76 insertions(+), 1 deletion(-)
 create mode 100644 HPPH.SkiaSharp/HPPH.SkiaSharp.csproj
 create mode 100644 HPPH.SkiaSharp/ImageExtension.cs
 create mode 100644 HPPH.SkiaSharp/ImageHelper.cs

diff --git a/HPPH.Benchmark/HPPH.Benchmark.csproj b/HPPH.Benchmark/HPPH.Benchmark.csproj
index 1147eb0..40c261e 100644
--- a/HPPH.Benchmark/HPPH.Benchmark.csproj
+++ b/HPPH.Benchmark/HPPH.Benchmark.csproj
@@ -13,6 +13,7 @@
 
   <ItemGroup>
     <ProjectReference Include="..\HPPH.Reference\HPPH.Reference.csproj" />
+    <ProjectReference Include="..\HPPH.SkiaSharp\HPPH.SkiaSharp.csproj" />
     <ProjectReference Include="..\HPPH.System.Drawing\HPPH.System.Drawing.csproj" />
     <ProjectReference Include="..\HPPH\HPPH.csproj" />
   </ItemGroup>
diff --git a/HPPH.SkiaSharp/HPPH.SkiaSharp.csproj b/HPPH.SkiaSharp/HPPH.SkiaSharp.csproj
new file mode 100644
index 0000000..c2837f1
--- /dev/null
+++ b/HPPH.SkiaSharp/HPPH.SkiaSharp.csproj
@@ -0,0 +1,18 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="SkiaSharp" Version="2.88.8" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\HPPH\HPPH.csproj" />
+  </ItemGroup>
+
+</Project>
\ No newline at end of file
diff --git a/HPPH.SkiaSharp/ImageExtension.cs b/HPPH.SkiaSharp/ImageExtension.cs
new file mode 100644
index 0000000..9ebd9de
--- /dev/null
+++ b/HPPH.SkiaSharp/ImageExtension.cs
@@ -0,0 +1,32 @@
+// ReSharper disable InconsistentNaming
+
+using System.Runtime.InteropServices;
+using System.Runtime.Versioning;
+using SkiaSharp;
+
+namespace HPPH.SkiaSharp;
+
+public static class ImageExtension
+{
+    public static unsafe SKImage ToSKImage(this IImage image) => SKImage.FromBitmap(image.ToSKBitmap());
+
+    public static unsafe SKBitmap ToSKBitmap(this IImage image)
+    {
+        SKBitmap bitmap = new(image.Width, image.Height, SKColorType.Bgra8888, SKAlphaType.Unpremul);
+        nint pixelPtr = bitmap.GetPixels(out nint length);
+        image.ConvertTo<ColorBGRA>().CopyTo(new Span<byte>((void*)pixelPtr, (int)length));
+
+        return bitmap;
+    }
+
+    public static byte[] ToPng(this IImage image)
+    {
+        using SKImage skImage = image.ToSKImage();
+        return skImage.Encode(SKEncodedImageFormat.Png, 100).ToArray();
+    }
+
+    public static IImage ToImage(this SKImage skImage) => SKBitmap.FromImage(skImage).ToImage();
+
+    public static IImage ToImage(this SKBitmap bitmap)
+        => Image<ColorBGRA>.Create(MemoryMarshal.Cast<SKColor, ColorBGRA>(bitmap.Pixels), bitmap.Width, bitmap.Height);
+}
\ No newline at end of file
diff --git a/HPPH.SkiaSharp/ImageHelper.cs b/HPPH.SkiaSharp/ImageHelper.cs
new file mode 100644
index 0000000..bf3cbe7
--- /dev/null
+++ b/HPPH.SkiaSharp/ImageHelper.cs
@@ -0,0 +1,18 @@
+using SkiaSharp;
+
+namespace HPPH.SkiaSharp;
+
+public static class ImageHelper
+{
+    public static IImage LoadImage(string path)
+    {
+        using SKImage image = SKImage.FromEncodedData(path);
+        return image.ToImage();
+    }
+
+    public static IImage LoadImage(Stream stream)
+    {
+        using SKImage image = SKImage.FromEncodedData(stream);
+        return image.ToImage();
+    }
+}
\ No newline at end of file
diff --git a/HPPH.sln b/HPPH.sln
index 88cae5d..fb8abc5 100644
--- a/HPPH.sln
+++ b/HPPH.sln
@@ -13,7 +13,9 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "HPPH.Reference", "HPPH.Refe
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "HPPH.Generators", "HPPH.Generators\HPPH.Generators.csproj", "{C247512B-E6D2-4591-8AFA-F2268F1AEAB2}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "HPPH.System.Drawing", "HPPH.System.Drawing\HPPH.System.Drawing.csproj", "{16EC37E4-3EF1-47AF-B257-465334B36571}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "HPPH.System.Drawing", "HPPH.System.Drawing\HPPH.System.Drawing.csproj", "{16EC37E4-3EF1-47AF-B257-465334B36571}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "HPPH.SkiaSharp", "HPPH.SkiaSharp\HPPH.SkiaSharp.csproj", "{E70CD72D-1A41-413E-B0C6-24958733A773}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -45,6 +47,10 @@ Global
 		{16EC37E4-3EF1-47AF-B257-465334B36571}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{16EC37E4-3EF1-47AF-B257-465334B36571}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{16EC37E4-3EF1-47AF-B257-465334B36571}.Release|Any CPU.Build.0 = Release|Any CPU
+		{E70CD72D-1A41-413E-B0C6-24958733A773}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{E70CD72D-1A41-413E-B0C6-24958733A773}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{E70CD72D-1A41-413E-B0C6-24958733A773}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{E70CD72D-1A41-413E-B0C6-24958733A773}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE