Add option to remove redundant alpha channels

GmodAddonCompressor/Bases/ImageEditBase.cs

@@ -273,6 +273,9 @@ private async Task SaveMagickImage(string imageSourcePath, string imageSavePath)
             {
                 try
                 {
+                    if (ImageContext.RemoveRedundantAlpha)
+                        await RemoveRedundantAlpha(image);
+
                     var size = new MagickGeometry(resizeWidth, resizeHeight);
                     size.IgnoreAspectRatio = isSingleColor ? true : !ImageContext.KeepImageAspectRatio;
 
@@ -333,5 +336,52 @@ private async Task SaveMagickImage(string imageSourcePath, string imageSavePath)
                 File.Copy(additionalCompressionFilePath, imageSavePath);
             }
         }
+
+        /*
+         * The Following checks if an alpha is redundant by the alpha's deviation
+         * A Value of 0 or NaN indicates a solid, unused alpha
+         * Alpha is then disabled: drastically reducing filesize
+         */
+        private async Task RemoveRedundantAlpha(MagickImage image)
+        {
+            _logger.LogInformation($"Attempting to remove redundant alphas..");
+            try
+            {
+                if (!image.HasAlpha)
+                    return;
+
+                double dev = GetStandardDeviation(image, PixelChannel.Alpha);
+                if (dev == 0 || Double.IsNaN(dev))
+                {
+                    image.Alpha(AlphaOption.Off);
+                }
+            }
+            catch (Exception ex)
+            {
+                if(ex==null)
+                    _logger.LogError("Something went wrong removing redundant alphas");
+                else
+                    _logger.LogError(ex.ToString());
+            }
+
+        }
+
+        private double GetStandardDeviation(MagickImage image, PixelChannel channel)
+        {
+            // Get the statistics of the alpha channel
+            var statistics = image.Statistics();
+
+            var alphaStatistics = statistics.GetChannel(PixelChannel.Alpha);
+
+            // The StandardDeviation property gives you the standard deviation
+            if (alphaStatistics == null)
+                return -1;
+            else
+                return alphaStatistics.StandardDeviation;
+        }
     }
+
+
 }
+
+

GmodAddonCompressor/DataContexts/ImageContext.cs

@@ -10,5 +10,6 @@ internal class ImageContext
         internal static bool ReduceExactlyToLimits;
         internal static bool KeepImageAspectRatio;
         internal static bool ImageMagickVTFCompress;
+        internal static bool RemoveRedundantAlpha;
     }
 }

GmodAddonCompressor/DataContexts/MainWindowContext.cs

@@ -24,6 +24,7 @@ internal class MainWindowContext : INotifyPropertyChanged
         private bool _reduceExactlyToResolution = true;
         private bool _keepImageAspectRatio = true;
         private bool _imageMagickVTFCompress = false;
+        private bool _removeRedundantAlpha = false;
         private uint _imageSkipWidth = 0;
         private uint _imageSkipHeight = 0;
         private int _wavRate = 22050;
@@ -173,6 +174,16 @@ public bool ImageMagickVTFCompress
             }
         }
 
+        public bool RemoveRedundantAlpha
+        {
+            get { return _removeRedundantAlpha; }
+            set
+            {
+                _removeRedundantAlpha = value;
+                OnPropertyChanged();
+            }
+        }
+
         public bool KeepImageAspectRatio
         {
             get { return _keepImageAspectRatio; }

GmodAddonCompressor/GmodAddonCompressor.csproj

@@ -13,7 +13,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Magick.NET-Q16-AnyCPU" Version="12.0.0" />
+    <PackageReference Include="Magick.NET-Q16-AnyCPU" Version="13.5.0" />
     <PackageReference Include="Microsoft.Extensions.Logging" Version="6.0.0" />
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="6.0.1" />
     <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="6.0.0" />

GmodAddonCompressor/MainWindow.xaml

@@ -31,16 +31,16 @@
     <Grid>
         <Grid.RowDefinitions>
             <RowDefinition></RowDefinition>
-            <RowDefinition Height="35"></RowDefinition>
+            <RowDefinition Height="34.04"></RowDefinition>
         </Grid.RowDefinitions>
         <Grid.ColumnDefinitions>
             <ColumnDefinition></ColumnDefinition>
             <ColumnDefinition Width="200"></ColumnDefinition>
-            <ColumnDefinition Width="260"></ColumnDefinition>
-            <ColumnDefinition Width="180"></ColumnDefinition>
+            <ColumnDefinition Width="293"></ColumnDefinition>
+            <ColumnDefinition Width="147"></ColumnDefinition>
         </Grid.ColumnDefinitions>
 
-        <Grid Grid.Column="0" Grid.Row="0" Margin="5, 10, 5, 10">
+        <Grid Grid.Column="0" Grid.Row="0" Margin="5,10,5,10">
             <StackPanel Orientation="Vertical">
                 <Grid>
                     <Grid.ColumnDefinitions>
@@ -88,7 +88,7 @@
             </StackPanel>
         </Grid>
 
-        <Grid Grid.Column="1" Grid.Row="0" Margin="10, 10, 5, 10">
+        <Grid Grid.Column="1" Grid.Row="0" Margin="10,10,5,10">
             <StackPanel Orientation="Vertical">
 
                 <StackPanel Orientation="Vertical">
@@ -140,8 +140,12 @@
             </StackPanel>
         </Grid>
 
-        <Grid Grid.Column="2" Grid.Row="0" Margin="5, 10, 5, 10">
-            <StackPanel Orientation="Vertical">
+        <Grid Grid.Column="2" Grid.Row="0" Margin="5,10,5,10">
+            <Grid.RowDefinitions>
+                <RowDefinition Height="245*"/>
+                <RowDefinition Height="54*"/>
+            </Grid.RowDefinitions>
+            <StackPanel Orientation="Vertical" Margin="0,0,0,-21" Grid.RowSpan="2">
                 <StackPanel Orientation="Horizontal">
                     <CheckBox
                         Style="{StaticResource DarkCheckBox}"
@@ -261,25 +265,25 @@
                     Margin="5"
                     IsChecked="{Binding ImageMagickVTFCompress}"
                     Style="{StaticResource DarkCheckBox}"
-                    Content="ImageMagick VTF compress (Demo)"/>
+                    Content="ImageMagick VTF compress (Demo)" Checked="CheckBox_Checked_1"/>
+
+                <CheckBox
+                    Margin="5"
+                    IsChecked="{Binding RemoveRedundantAlpha}"
+                    Style="{StaticResource DarkCheckBox}"
+                    Content="Remove Redundant Alpha (ImageMagic needed)&#xD;&#xA;" Width="284" Checked="CheckBox_Checked"/>
+
             </StackPanel>
         </Grid>
 
-        <Grid Grid.Column="3" Grid.Row="0" Margin="5, 10, 5, 10">
+        <Grid Grid.Column="3" Grid.Row="0" Margin="5,10,5,10">
             <StackPanel Orientation="Vertical">
                 <CheckBox
                     Style="{StaticResource DarkCheckBox}"
-                    Margin="20, 5, 0, 5"
                     Content="LUA"
-                    HorizontalAlignment="Left"
                     IsChecked="{Binding CompressLUA}"/>
-
                 <CheckBox
-                    Style="{StaticResource DarkCheckBox}"
-                    Margin="20, 5, 0, 5"
-                    Content="Change original code"
-                    HorizontalAlignment="Left"
-                    IsChecked="{Binding ChangeOriginalCodeToMinimalistic}"/>
+            Style="{StaticResource DarkCheckBox}" IsChecked="{Binding ChangeOriginalCodeToMinimalistic}" Content="Change original code"/>
             </StackPanel>
         </Grid>
 
@@ -303,7 +307,7 @@
 
                 <TextBlock 
                     Style="{StaticResource DarkTextBlock}"
-                    Text="Author: Shark_vil" 
+                    Text="Author: Shark_vil, zeThijs" 
                     VerticalAlignment="Center"
                     HorizontalAlignment="Center"/>
             </StackPanel>

GmodAddonCompressor/MainWindow.xaml.cs

@@ -10,7 +10,7 @@ namespace GmodAddonCompressor
     public partial class MainWindow : Window
     {
         private MainWindowContext _context = new MainWindowContext();
-        private const string _version = "v2.0.4";
+        private const string _version = "v2.0.5";
 
         public MainWindow()
         {
@@ -66,6 +66,7 @@ private async Task StartCompressProcess(string addonDirectoryPath)
             ImageContext.ReduceExactlyToLimits = _context.ReduceExactlyToLimits;
             ImageContext.KeepImageAspectRatio = _context.KeepImageAspectRatio;
             ImageContext.ImageMagickVTFCompress = _context.ImageMagickVTFCompress;
+            ImageContext.RemoveRedundantAlpha = _context.RemoveRedundantAlpha;
             LuaContext.ChangeOriginalCodeToMinimalistic = _context.ChangeOriginalCodeToMinimalistic;
 
             var compressSystem = new CompressAddonSystem(addonDirectoryPath);
@@ -113,5 +114,15 @@ private void CheckBox_DisableDebugConsole(object sender, RoutedEventArgs e)
         {
             ConsoleHelper.FreeConsole();
         }
+
+        private void CheckBox_Checked(object sender, RoutedEventArgs e)
+        {
+
+        }
+
+        private void CheckBox_Checked_1(object sender, RoutedEventArgs e)
+        {
+
+        }
     }
 }

GmodAddonCompressor/Objects/VTFEdit.cs

@@ -8,9 +8,12 @@
 using ImageMagick;
 using Microsoft.Extensions.Logging;
 using System;
+using System.Collections.Generic;
 using System.Diagnostics;
 using System.IO;
 using System.IO.Compression;
+using System.Linq;
+using System.Threading.Channels;
 using System.Threading.Tasks;
 
 namespace GmodAddonCompressor.Objects
@@ -245,6 +248,7 @@ private async Task VtfToPng(VtfFileModel vtfInfo, string vtfFilePath, string vtf
             await VtfToImage(vtfInfo, "png", vtfFilePath, vtfDirectory);
         }
 
+
         private async Task OptImageToVtf(VtfFileModel vtfInfo, string imageFilePath, string? pngDirectory = null)
         {
             if (string.IsNullOrEmpty(pngDirectory))