图像像素滑块效果不工作

我正在使用PixelShader效果。

用于调整对比度、亮度、CMY的图像效果;RGB使用SLIDERS
混合模式预定义的图像效果&在组合框中加载，用户可以选择自己的选择。

这是Image元素和图像效果，用于调整对比度，亮度，CMY &RGB以这种方式应用。

<Viewbox  x:Name="cImage" Stretch="Uniform"  Grid.Column="1" Grid.Row="1" Grid.RowSpan="2" Margin="0" >
    <Image x:Name="ViewedPhoto"   Source="IMG_0071.jpg" 
    Stretch="None" VerticalAlignment="Top" HorizontalAlignment="Left"  Margin="0,5,0,95" >
        <Image.Effect>
            <l:BrightContrastEffect 
            Brightness="{Binding Value, ElementName=bVal}"
            Contrast="{Binding Value, ElementName=cVal}"
            Red="{Binding Value, ElementName=rVal}"
            Green="{Binding Value, ElementName=gVal}"
            Blue="{Binding Value, ElementName=blVal}"
        />
        </Image.Effect>
    </Image>
</Viewbox>

亮度滑块:

    <Slider Maximum="1" Minimum="-1"  x:Name="bVal"  TickFrequency="1" TickPlacement="BottomRight"  />
<StackPanel Orientation="Horizontal">
                <TextBox Text="{Binding Value, ElementName=bVal, UpdateSourceTrigger=PropertyChanged}"  TextAlignment="Right" Width="30"  Height="10" Margin="0" RenderTransformOrigin="-1.167,0.423" Visibility="Hidden"/>
</StackPanel>

当我移动滑块来调整对比度，亮度，CMY &Rgb it's working。

我使用comboBox应用预定义的混合模式图像效果。

<ComboBox x:Name="cColorEffects"  SelectionChanged="cColorEffects_SelectionChanged" />

为了显示不同的效果，我首先调用ViewedPhoto.Effect = null; &然后应用选定的效果。

if (cColorEffects.SelectedIndex == 0)
{
    ViewedPhoto.Effect = null;
    ViewedPhoto.Effect = new AverageEffect();
}
if (cColorEffects.SelectedIndex == 1)
{
    ViewedPhoto.Effect = null;
    ViewedPhoto.Effect = new ColorBurnEffect();
}

问题:

我通过comboBox调用另一个图像效果，因此图像效果用于调整对比度，亮度，CMY &
我使用ViewedPhoto.Effect = null;图像效果来调整对比度，亮度，CMY &;RGB不工作。

我想让the sliders working for adjusting对比度，亮度，CMY &RGB和apply the blend mode image effects simultaneously。我怎样才能解决这个问题?还是给我个解决办法?

编辑:

我一直在想我可以让滑块按语法绑定和图像效果。这有意义吗?如果它是好的;我怎么应用这个呢?

<Image x:Name="ViewedPhoto"   >
    <Image.Effect>
        <l:BrightContrastEffect 
        Brightness="{Binding Value, ElementName=bVal}"
        Contrast="{Binding Value, ElementName=cVal}"
        Red="{Binding Value, ElementName=rVal}"
        Green="{Binding Value, ElementName=gVal}"
        Blue="{Binding Value, ElementName=blVal}"
    />
    </Image.Effect>
</Image>
<Slider Maximum="1" Minimum="-1"  x:Name="bVal"  TickFrequency="1" TickPlacement="BottomRight"  />
<StackPanel Orientation="Horizontal">
    <TextBox Text="{Binding Value, ElementName=bVal, UpdateSourceTrigger=PropertyChanged}"  Visibility="Hidden"/>
    <Button x:Name="bReset" Content="R" Height="10" Width="30" Margin="35,0,0,0" Click="bReset_Click"/>
</StackPanel>
<Slider Maximum="1" Minimum="-1" x:Name="cVal" TickFrequency="1" TickPlacement="BottomRight" />
<StackPanel Orientation="Horizontal">
    <TextBox Text="{Binding Value, ElementName=cVal, UpdateSourceTrigger=PropertyChanged}"    Visibility="Hidden" />
    <Button x:Name="cReset" Content="R" Height="10" Width="30" Margin="35,0,0,0" Click="cReset_Click"/>
</StackPanel>

附加信息与代码:

 public class BlendModeEffect : ShaderEffect
    {
        public BlendModeEffect()
        {
            UpdateShaderValue(InputProperty);
            UpdateShaderValue(TextureProperty);
        }
        public Brush Input
        {
            get { return (Brush)GetValue(InputProperty); }
            set { SetValue(InputProperty, value); }
        }
        public static readonly DependencyProperty InputProperty =
            ShaderEffect.RegisterPixelShaderSamplerProperty
            (
                "Input",
                typeof(BlendModeEffect),
                0
            );
        public Brush Texture
        {
            get { return (Brush)GetValue(TextureProperty); }
            set { SetValue(TextureProperty, value); }
        }
        public static readonly DependencyProperty TextureProperty =
            ShaderEffect.RegisterPixelShaderSamplerProperty
            (
                "Texture",
                typeof(BlendModeEffect),
                1
            );
    }
//Contrast, Brightness, CMY & RGB Effect
  public class BrightContrastEffect : ShaderEffect
    {
        private static PixelShader m_shader =
            new PixelShader() { UriSource = MakePackUri("bricon.ps") };
        public BrightContrastEffect()
        {

            PixelShader = m_shader;
            UpdateShaderValue(InputProperty);
            UpdateShaderValue(BrightnessProperty);
            UpdateShaderValue(ContrastProperty);
            UpdateShaderValue(RedProperty);
            UpdateShaderValue(GreenProperty);
            UpdateShaderValue(BlueProperty);
        }
        // MakePackUri is a utility method for computing a pack uri 
        // for the given resource.  
        public static Uri MakePackUri(string relativeFile)
        {
            Assembly a = typeof(BrightContrastEffect).Assembly;
            // Extract the short name. 
            string assemblyShortName = a.ToString().Split(',')[0];
            string uriString = "pack://application:,,,/" +
                assemblyShortName +
                ";component/" +
                relativeFile;
            return new Uri(uriString);
        }
        public Brush Input
        {
            get { return (Brush)GetValue(InputProperty); }
            set { SetValue(InputProperty, value); }
        }
        public static readonly DependencyProperty InputProperty = ShaderEffect.RegisterPixelShaderSamplerProperty("Input", typeof(BrightContrastEffect), 0);
        public float Brightness
        {
            get { return (float)GetValue(BrightnessProperty); }
            set { SetValue(BrightnessProperty, value); }
        }
        public static readonly DependencyProperty BrightnessProperty = DependencyProperty.Register("Brightness", typeof(double), typeof(BrightContrastEffect), new UIPropertyMetadata(0.0, PixelShaderConstantCallback(0)));
        public float Contrast
        {
            get { return (float)GetValue(ContrastProperty); }
            set { SetValue(ContrastProperty, value); }
        }
        public static readonly DependencyProperty ContrastProperty = DependencyProperty.Register("Contrast", typeof(double), typeof(BrightContrastEffect), new UIPropertyMetadata(0.0, PixelShaderConstantCallback(1)));

        public float Red
        {
            get { return (float)GetValue(RedProperty); }
            set { SetValue(RedProperty, value); }
        }
        public static readonly DependencyProperty RedProperty = DependencyProperty.Register("Red", typeof(double), typeof(BrightContrastEffect), new UIPropertyMetadata(0.0, PixelShaderConstantCallback(2)));
        public float Green
        {
            get { return (float)GetValue(GreenProperty); }
            set { SetValue(RedProperty, value); }
        }
        public static readonly DependencyProperty GreenProperty = DependencyProperty.Register("Green", typeof(double), typeof(BrightContrastEffect), new UIPropertyMetadata(0.0, PixelShaderConstantCallback(3)));
        public float Blue
        {
            get { return (float)GetValue(BlueProperty); }
            set { SetValue(BlueProperty, value); }
        }
        public static readonly DependencyProperty BlueProperty = DependencyProperty.Register("Blue", typeof(double), typeof(BrightContrastEffect), new UIPropertyMetadata(0.0, PixelShaderConstantCallback(4)));
        //private static PixelShader m_shader = new PixelShader() { UriSource = new Uri(@"pack://application:,,,/CustomPixelRender;component/bricon.ps") };
    }
//Average Blend Mode Effect
 public class AverageEffect : BlendModeEffect
    {
        public static Uri MakePackUri(string relativeFile)
        {
            Assembly a = typeof(ColorBurnEffect).Assembly;
            // Extract the short name. 
            string assemblyShortName = a.ToString().Split(',')[0];
            string uriString = "pack://application:,,,/" +
                assemblyShortName +
                ";component/" +
                relativeFile;
            return new Uri(uriString);
        }
        static AverageEffect()
        {
            _pixelShader.UriSource = MakePackUri("AverageEffect.ps");
        }
        public AverageEffect()
        {
            this.PixelShader = _pixelShader;
        }
        private static PixelShader _pixelShader = new PixelShader();
    }
//ColorBurn Effect
  public class ColorDodgeEffect : BlendModeEffect
    {
        public static Uri MakePackUri(string relativeFile)
        {
            Assembly a = typeof(ColorBurnEffect).Assembly;
            // Extract the short name. 
            string assemblyShortName = a.ToString().Split(',')[0];
            string uriString = "pack://application:,,,/" +
                assemblyShortName +
                ";component/" +
                relativeFile;
            return new Uri(uriString);
        }
        static ColorDodgeEffect()
        {
            _pixelShader.UriSource = MakePackUri("ColorDodgeEffect.ps");
        }
        public ColorDodgeEffect()
        {
            this.PixelShader = _pixelShader;
        }
        private static PixelShader _pixelShader = new PixelShader();
    }
//BlendModeEffect
  public class BlendModeEffect : ShaderEffect
    {
        public BlendModeEffect()
        {
            UpdateShaderValue(InputProperty);
            UpdateShaderValue(TextureProperty);
        }
        public Brush Input
        {
            get { return (Brush)GetValue(InputProperty); }
            set { SetValue(InputProperty, value); }
        }
        public static readonly DependencyProperty InputProperty =
            ShaderEffect.RegisterPixelShaderSamplerProperty
            (
                "Input",
                typeof(BlendModeEffect),
                0
            );
        public Brush Texture
        {
            get { return (Brush)GetValue(TextureProperty); }
            set { SetValue(TextureProperty, value); }
        }
        public static readonly DependencyProperty TextureProperty =
            ShaderEffect.RegisterPixelShaderSamplerProperty
            (
                "Texture",
                typeof(BlendModeEffect),
                1
            );
    }

根据SO聊天使用建议。我已经调用 brightcontrsteffect 作为滑动块更改事件处理程序中图像的新效果。我按程序语法设置投标值。

private void cVal_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
{
   cColorEffects.SelectedIndex = 0;
   BrightContrastEffect bce = new BrightContrastEffect();
   BindingOperations.SetBinding(bce, BrightContrastEffect.ContrastProperty, new        Binding("Value") { Source = cVal });
ViewedPhoto.Effect = bce;
}

我对其他滑块应用了相同的方法。

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