Add built-in ThumbnailViewer plugin

QuickLook.Plugin/QuickLook.Plugin.ImageViewer/Helper.cs

@@ -20,13 +20,50 @@ using System;
 using System.IO;
 using System.Reflection;
 using System.Text;
+using System.Windows;
 using System.Windows.Media.Imaging;
 
 namespace QuickLook.Plugin.ImageViewer;
 
-internal class Helper
+internal static class Helper
 {
-    public static void DpiHack(BitmapSource img)
+    public static BitmapSource InvertColors(this BitmapSource source)
+    {
+        WriteableBitmap writableBitmap = new(source);
+        writableBitmap.Lock();
+
+        nint pBackBuffer = writableBitmap.BackBuffer;
+        int stride = writableBitmap.BackBufferStride;
+        int width = writableBitmap.PixelWidth;
+        int height = writableBitmap.PixelHeight;
+        int bytesPerPixel = (writableBitmap.Format.BitsPerPixel + 7) / 8;
+
+        unsafe
+        {
+            byte* pPixels = (byte*)pBackBuffer;
+
+            for (int y = 0; y < height; y++)
+            {
+                Span<byte> row = new(pPixels + y * stride, width * bytesPerPixel);
+
+                for (int x = 0; x < width; x++)
+                {
+                    int index = x * bytesPerPixel;
+
+                    row[index] = (byte)(255 - row[index]);
+                    row[index + 1] = (byte)(255 - row[index + 1]);
+                    row[index + 2] = (byte)(255 - row[index + 2]);
+                }
+            }
+        }
+
+        writableBitmap.AddDirtyRect(new Int32Rect(0, 0, width, height));
+        writableBitmap.Unlock();
+
+        return writableBitmap;
+    }
+
+    public static void DpiHack(this BitmapSource img)
     {
         // a dirty hack... but is the fastest
 

QuickLook.Plugin/QuickLook.Plugin.ImageViewer/ImagePanel.xaml

@@ -102,7 +102,24 @@
                     Content=""
                     Style="{StaticResource CaptionButtonStyle}"
                     Visibility="{Binding ElementName=imagePanel, Path=CopyIconVisibility}" />
-
+            <Button x:Name="buttonSaveAs"
+                    Width="24"
+                    Height="24"
+                    Margin="0,8,8,0"
+                    HorizontalAlignment="Right"
+                    VerticalAlignment="Top"
+                    Content="&#xE792;"
+                    Style="{StaticResource CaptionButtonStyle}"
+                    Visibility="{Binding ElementName=imagePanel, Path=SaveAsVisibility}" />
+            <Button x:Name="buttonReverseColor"
+                    Width="24"
+                    Height="24"
+                    Margin="0,8,8,0"
+                    HorizontalAlignment="Right"
+                    VerticalAlignment="Top"
+                    Content="&#xE746;"
+                    Style="{StaticResource CaptionButtonStyle}"
+                    Visibility="{Binding ElementName=imagePanel, Path=ReverseColorVisibility}" />
             <Button x:Name="buttonMeta"
                     Width="24"
                     Height="24"
@@ -110,7 +127,6 @@
                     Content="&#xE946;"
                     Style="{StaticResource CaptionButtonStyle}"
                     Visibility="{Binding ElementName=imagePanel, Path=MetaIconVisibility}" />
-
             <Button x:Name="buttonBackgroundColour"
                     Width="24"
                     Height="24"
@@ -119,7 +135,6 @@
                     Style="{StaticResource CaptionButtonStyle}"
                     Visibility="{Binding ElementName=imagePanel, Path=BackgroundVisibility}" />
         </StackPanel>
-
         <TextBlock x:Name="textMeta"
                    Margin="0,40,8,0"
                    Padding="5,5,5,5"

QuickLook.Plugin/QuickLook.Plugin.ImageViewer/ImagePanel.xaml.cs

@@ -15,6 +15,7 @@
 // You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+using Microsoft.Win32;
 using QuickLook.Common.Annotations;
 using QuickLook.Common.ExtensionMethods;
 using QuickLook.Common.Helpers;
@@ -23,6 +24,7 @@ using QuickLook.Plugin.ImageViewer.NativeMethods;
 using System;
 using System.ComponentModel;
 using System.Diagnostics;
+using System.IO;
 using System.Linq;
 using System.Runtime.CompilerServices;
 using System.Threading;
@@ -47,9 +49,7 @@ public partial class ImagePanel : UserControl, INotifyPropertyChanged, IDisposab
     private bool _isZoomFactorFirstSet = true;
     private DateTime _lastZoomTime = DateTime.MinValue;
     private double _maxZoomFactor = 3d;
-    private Visibility _copyIconVisibility = Visibility.Visible;
     private MetaProvider _meta;
-    private Visibility _metaIconVisibility = Visibility.Visible;
     private double _minZoomFactor = 0.1d;
     private BitmapScalingMode _renderMode = BitmapScalingMode.Linear;
     private bool _showZoomLevelInfo = true;
@@ -60,6 +60,11 @@ public partial class ImagePanel : UserControl, INotifyPropertyChanged, IDisposab
     private double _zoomToFitFactor;
     private bool _zoomWithControlKey;
 
+    private Visibility _copyIconVisibility = Visibility.Visible;
+    private Visibility _saveAsVisibility = Visibility.Collapsed;
+    private Visibility _reverseColorVisibility = Visibility.Collapsed;
+    private Visibility _metaIconVisibility = Visibility.Visible;
+
     public ImagePanel()
     {
         InitializeComponent();
@@ -68,6 +73,10 @@ public partial class ImagePanel : UserControl, INotifyPropertyChanged, IDisposab
 
         buttonCopy.Click += OnCopyOnClick;
 
+        buttonSaveAs.Click += OnSaveAsOnClick;
+
+        buttonReverseColor.Click += OnReverseColorOnClick;
+
         buttonMeta.Click += (sender, e) =>
             textMeta.Visibility = textMeta.Visibility == Visibility.Collapsed
                 ? Visibility.Visible
@@ -153,16 +162,6 @@ public partial class ImagePanel : UserControl, INotifyPropertyChanged, IDisposab
         }
     }
 
-    public Visibility MetaIconVisibility
-    {
-        get => _metaIconVisibility;
-        set
-        {
-            _metaIconVisibility = value;
-            OnPropertyChanged();
-        }
-    }
-
     public Visibility CopyIconVisibility
     {
         get => _copyIconVisibility;
@@ -173,6 +172,36 @@ public partial class ImagePanel : UserControl, INotifyPropertyChanged, IDisposab
         }
     }
 
+    public Visibility SaveAsVisibility
+    {
+        get => _saveAsVisibility;
+        set
+        {
+            _saveAsVisibility = value;
+            OnPropertyChanged();
+        }
+    }
+
+    public Visibility ReverseColorVisibility
+    {
+        get => _reverseColorVisibility;
+        set
+        {
+            _reverseColorVisibility = value;
+            OnPropertyChanged();
+        }
+    }
+
+    public Visibility MetaIconVisibility
+    {
+        get => _metaIconVisibility;
+        set
+        {
+            _metaIconVisibility = value;
+            OnPropertyChanged();
+        }
+    }
+
     public Visibility BackgroundVisibility
     {
         get => _backgroundVisibility;
@@ -307,6 +336,51 @@ public partial class ImagePanel : UserControl, INotifyPropertyChanged, IDisposab
         }
     }
 
+    private void OnSaveAsOnClick(object sender, RoutedEventArgs e)
+    {
+        if (_source == null)
+        {
+            return;
+        }
+
+        var dialog = new SaveFileDialog()
+        {
+            Filter = "PNG Image|*.png",
+            DefaultExt = ".png",
+            FileName = Path.GetFileNameWithoutExtension(ContextObject.Title)
+        };
+
+        if (dialog.ShowDialog() == true)
+        {
+            try
+            {
+                if (File.Exists(dialog.FileName))
+                {
+                    File.Delete(dialog.FileName);
+                }
+
+                PngBitmapEncoder encoder = new();
+                encoder.Frames.Add(BitmapFrame.Create(_source));
+                using FileStream stream = new(dialog.FileName, FileMode.Create, FileAccess.Write);
+                encoder.Save(stream);
+            }
+            catch
+            {
+                ///
+            }
+        }
+    }
+
+    private void OnReverseColorOnClick(object sender, RoutedEventArgs e)
+    {
+        if (_source == null)
+        {
+            return;
+        }
+
+        Source = _source.InvertColors();
+    }
+
     private void OnBackgroundColourOnClick(object sender, RoutedEventArgs e)
     {
         Theme = Theme == Themes.Dark ? Themes.Light : Themes.Dark;

QuickLook.Plugin/QuickLook.Plugin.ImageViewer/QuickLook.Plugin.ImageViewer.csproj

@@ -64,6 +64,12 @@
         <PackageReference Include="Microsoft.Web.WebView2" Version="1.0.3296.44">
             <PrivateAssets>all</PrivateAssets>
         </PackageReference>
+        <PackageReference Include="System.Memory" Version="4.6.3">
+            <PrivateAssets>all</PrivateAssets>
+        </PackageReference>
+        <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="6.1.2">
+            <PrivateAssets>all</PrivateAssets>
+        </PackageReference>
     </ItemGroup>
 
     <ItemGroup Condition=" '$(DefineConstants)' != '' and $(DefineConstants.Contains('USESVGSKIA')) ">