[C#/MAUI/.NET6] ICanvas 인터페이스 : BlendMode 속성을 사용해 혼합 모드 설정하기 (프리뷰 버전 오류)

TestProject.zip

0.15MB

▶ GraphicsDrawable.cs

namespace TestProject;

/// <summary>
/// 그래픽스 그리기 가능형
/// </summary>
public class GraphicsDrawable : IDrawable
{
    //////////////////////////////////////////////////////////////////////////////////////////////////// Method
    ////////////////////////////////////////////////////////////////////////////////////////// Public

    #region 그리기 - Draw(canvas, dirtyRectangle)

    /// <summary>
    /// 그리기
    /// </summary>
    /// <param name="canvas">캔버스</param>
    /// <param name="dirtyRectangle">더티 사각형</param>
    public void Draw(ICanvas canvas, RectF dirtyRectangle)
    {
        PointF centerPoint = new PointF(dirtyRectangle.Center.X, dirtyRectangle.Center.Y);
        float  radius      = Math.Min(dirtyRectangle.Width, dirtyRectangle.Height) / 4;
        float  distance    = 0.8f * radius;

        PointF centerPoint1 = new PointF
        (
            distance * (float)Math.Cos(9 * Math.PI / 6) + centerPoint.X,
            distance * (float)Math.Sin(9 * Math.PI / 6) + centerPoint.Y
        );

        PointF centerPoint2 = new PointF
        (
            distance * (float)Math.Cos(1 * Math.PI / 6) + centerPoint.X,
            distance * (float)Math.Sin(1 * Math.PI / 6) + centerPoint.Y
        );

        PointF centerPoint3 = new PointF
        (
            distance * (float)Math.Cos(5 * Math.PI / 6) + centerPoint.X,
            distance * (float)Math.Sin(5 * Math.PI / 6) + centerPoint.Y
        );

        canvas.BlendMode = BlendMode.Multiply;

        canvas.FillColor = Colors.Cyan;

        canvas.FillCircle(centerPoint1, radius);

        canvas.FillColor = Colors.Magenta;

        canvas.FillCircle(centerPoint2, radius);

        canvas.FillColor = Colors.Yellow;

        canvas.FillCircle(centerPoint3, radius);
    }

    #endregion
}

 

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▶ MainPage.xaml

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage x:Class="TestProject.MainPage"
    xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:local="clr-namespace:TestProject">
    <ContentPage.Resources>
        <local:GraphicsDrawable x:Key="GraphicsDrawableKey" />
    </ContentPage.Resources>
    <GraphicsView
        HorizontalOptions="Center"
        VerticalOptions="Center"
        WidthRequest="350"
        HeightRequest="350"
        Drawable="{StaticResource GraphicsDrawableKey}" />
</ContentPage>