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Creating custom shaders for WPF applications

22/10/2024 stigzler 0

Example approach This creates a greyscale shader: Create a folder for your custom shaders Create a new class to interface the shader:

Imports System.Windows.Media.Effects

Public Class GrayscaleEffect
    Inherits ShaderEffect

    Private Shared _pixelShader As PixelShader = New PixelShader() With {
        .UriSource = New Uri("pack://application:,,,/WpfWorkspace;component/ShaderEffects/GrayscaleEffect.ps")
    }

    Public Sub New()
        PixelShader = _pixelShader
        UpdateShaderValue(InputProperty)
        UpdateShaderValue(DesaturationFactorProperty)
    End Sub

    Public Shared ReadOnly InputProperty As DependencyProperty = ShaderEffect.RegisterPixelShaderSamplerProperty("Input", GetType(GrayscaleEffect), 0)

    Public Property Input As Brush
        Get
            Return CType(GetValue(InputProperty), Brush)
        End Get
        Set(ByVal value As Brush)
            SetValue(InputProperty, value)
        End Set
    End Property

    Public Shared ReadOnly DesaturationFactorProperty As DependencyProperty = DependencyProperty.Register("DesaturationFactor", GetType(Double), GetType(GrayscaleEffect), New UIPropertyMetadata(0.0, PixelShaderConstantCallback(0), AddressOf CoerceDesaturationFactor))

    Public Property DesaturationFactor As Double
        Get
            Return CDbl(GetValue(DesaturationFactorProperty))
        End Get
        Set(ByVal value As Double)
            SetValue(DesaturationFactorProperty, value)
        End Set
    End Property

    Private Shared Function CoerceDesaturationFactor(ByVal d As DependencyObject, ByVal value As Object) As Object
        Dim effect As GrayscaleEffect = CType(d, GrayscaleEffect)
        Dim newFactor As Double = CDbl(value)

        If newFactor < 0.0 OrElse newFactor > 1.0 Then
            Return effect.DesaturationFactor
        End If

        Return newFactor
    End Function

End Class

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Imports System.Windows.Media.Effects

Public Class GrayscaleEffect

Inherits ShaderEffect

Private Shared _pixelShader As PixelShader = New PixelShader() With {

.UriSource = New Uri("pack://application:,,,/WpfWorkspace;component/ShaderEffects/GrayscaleEffect.ps")

}

Public Sub New()

PixelShader = _pixelShader

UpdateShaderValue(InputProperty)

UpdateShaderValue(DesaturationFactorProperty)

End Sub

Public Shared ReadOnly InputProperty As DependencyProperty = ShaderEffect.RegisterPixelShaderSamplerProperty("Input", GetType(GrayscaleEffect), 0)

Public Property Input As Brush

Get

Return CType(GetValue(InputProperty), Brush)

End Get

Set(ByVal value As Brush)

SetValue(InputProperty, value)

End Set

End Property

Public Shared ReadOnly DesaturationFactorProperty As DependencyProperty = DependencyProperty.Register("DesaturationFactor", GetType(Double), GetType(GrayscaleEffect), New UIPropertyMetadata(0.0, PixelShaderConstantCallback(0), AddressOf CoerceDesaturationFactor))

Public Property DesaturationFactor As Double

Get

Return CDbl(GetValue(DesaturationFactorProperty))

End Get

Set(ByVal value As Double)

SetValue(DesaturationFactorProperty, value)

End Set

End Property

Private Shared Function CoerceDesaturationFactor(ByVal d As DependencyObject, ByVal value As Object) As Object

Dim effect As GrayscaleEffect = CType(d, GrayscaleEffect)

Dim newFactor As Double = CDbl(value)

If newFactor < 0.0 OrElse newFactor > 1.0 Then

Return effect.DesaturationFactor

End If

Return newFactor

End Function

End Class

Make sure […]

Krypton Docking Getting Started

31/03/2024 stigzler 0

Intro Krypton Suite is an awesome free controls library for Winforms. It’s presently being maintained/expanded by some good souls. You can check it out here: GitHub […]

Passing a Type to a Method and returning an instantiated object with additional Type member operations

05/02/2024 stigzler 0

using System;

namespace AnnonymousTypeInstantiation
{
    internal interface INamifiableEntity
    {
        void Namify(string suffix);
    }

    internal class Pet : INamifiableEntity
    {
        public string PetName { get; set; }
        public Pet() { } // required
        public void Namify(string name)
        {
            PetName = name;
        }
    }

    internal class User : INamifiableEntity
    {
        public string Name { get; set; }
        public User() { } // required
        public void Namify(string name)
        {
            Name = name;
        }
    }

    internal class Program
    {
        // The Static can be dropped
        private static T SetName<T>(string suffix) where T : INamifiableEntity, new()
        {
            var obj = new T();
            obj.Namify(suffix);
            return obj;
        }
        static void Main(string[] args)
        {
            object obj1 = SetName<User>("stigzler");
            object obj2 = SetName<Pet>("Fido");

            Console.Write("User: " + ((User)obj1).Name + Environment.NewLine);
            Console.Write("Pet: " + ((Pet)obj2).PetName);
            Console.ReadLine();
        }
    }
}

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using System;

namespace AnnonymousTypeInstantiation

{

internal interface INamifiableEntity

{

void Namify(string suffix);

}

internal class Pet : INamifiableEntity

{

public string PetName { get; set; }

public Pet() { } // required

public void Namify(string name)

{

PetName = name;

}

internal class User : INamifiableEntity

{

public string Name { get; set; }

public User() { } // required

public void Namify(string name)

{

Name = name;

}

internal class Program

{

// The Static can be dropped

private static T SetName<T>(string suffix) where T : INamifiableEntity, new()

{

var obj = new T();

obj.Namify(suffix);

return obj;

}

static void Main(string[] args)

{

object obj1 = SetName<User>("stigzler");

object obj2 = SetName<Pet>("Fido");

Console.Write("User: " + ((User)obj1).Name + Environment.NewLine);

Console.Write("Pet: " + ((Pet)obj2).PetName);

Console.ReadLine();

}

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