[C#/WPF] DrawingVisual 객체를 PNG 파일로 저장하기

■ DrawingVisual 객체를 PNG 파일로 저장하는 방법을 보여준다.

▶ MainWindow.xaml


<Window x:Class="TestProject.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Width="800"
    Height="600"
    Title="TestProject"
    FontFamily="나눔고딕코딩"
    FontSize="16">
    <Button Name="createImageFileButton"
        Width="150"
        Height="30"
        Content="이미지 파일 생성" />
</Window>

<Window x:Class="TestProject.MainWindow"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

Width="800"

Height="600"

Title="TestProject"

FontFamily="나눔고딕코딩"

FontSize="16">

<Button Name="createImageFileButton"

Width="150"

Height="30"

Content="이미지 파일 생성" />

</Window>

▶ MainWindow.xaml.cs


using System;
using System.Globalization;
using System.IO;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Imaging;

namespace TestProject
{
    /// <summary>
    /// 메인 윈도우
    /// </summary>
    public partial class MainWindow : Window
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainWindow()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainWindow()
        {
            InitializeComponent();

            this.createImageFileButton.Click += createImageFileButton_Click;
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 이미지 파일 생성 버튼 클릭시 처리하기 - createImageFileButton_Click(sender, e)

        /// <summary>
        /// 이미지 파일 생성 버튼 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void createImageFileButton_Click(object sender, RoutedEventArgs e)
        {
            BitmapImage bitmapImage = new BitmapImage();

            bitmapImage.BeginInit();

            bitmapImage.UriSource = new Uri("IMAGE/waterlilies.jpg", UriKind.Relative);

            bitmapImage.DecodePixelWidth = 200;

            bitmapImage.EndInit();

            FormattedText formattedText = new FormattedText
            (
                "Waterlilies",
                new CultureInfo("en-us"),
                FlowDirection.LeftToRight,
                new Typeface(FontFamily, FontStyles.Normal, FontWeights.Normal, new FontStretch()),
                this.FontSize,
                Brushes.White
            );

            DrawingVisual drawingVisual = new DrawingVisual();

            DrawingContext drawingContext = drawingVisual.RenderOpen();

            drawingContext.DrawImage(bitmapImage, new Rect(0, 0, bitmapImage.Width, bitmapImage.Height));

            drawingContext.DrawText(formattedText, new Point(bitmapImage.Height / 2, 0));

            drawingContext.Close();

            RenderTargetBitmap renderTargetBitmap = new RenderTargetBitmap
            (
                bitmapImage.PixelWidth,
                bitmapImage.PixelHeight,
                96,
                96,
                PixelFormats.Pbgra32
            );

            renderTargetBitmap.Render(drawingVisual);

            PngBitmapEncoder encoder = new PngBitmapEncoder();

            encoder.Frames.Add(BitmapFrame.Create(renderTargetBitmap));

            using(FileStream stream = File.Create("target.png"))
            {
                encoder.Save(stream);
            }
        }

        #endregion
    }
}

using System;

using System.Globalization;

using System.IO;

using System.Windows;

using System.Windows.Media;

using System.Windows.Media.Imaging;

namespace TestProject

{

/// <summary>

/// 메인 윈도우

/// </summary>

public partial class MainWindow : Window

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - MainWindow()

/// <summary>

/// 생성자

/// </summary>

public MainWindow()

{

InitializeComponent();

this.createImageFileButton.Click += createImageFileButton_Click;

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 이미지 파일 생성 버튼 클릭시 처리하기 - createImageFileButton_Click(sender, e)

/// <summary>

/// 이미지 파일 생성 버튼 클릭시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void createImageFileButton_Click(object sender, RoutedEventArgs e)

{

BitmapImage bitmapImage = new BitmapImage();

bitmapImage.BeginInit();

bitmapImage.UriSource = new Uri("IMAGE/waterlilies.jpg", UriKind.Relative);

bitmapImage.DecodePixelWidth = 200;

bitmapImage.EndInit();

FormattedText formattedText = new FormattedText

(

"Waterlilies",

new CultureInfo("en-us"),

FlowDirection.LeftToRight,

new Typeface(FontFamily, FontStyles.Normal, FontWeights.Normal, new FontStretch()),

this.FontSize,

Brushes.White

);

DrawingVisual drawingVisual = new DrawingVisual();

DrawingContext drawingContext = drawingVisual.RenderOpen();

drawingContext.DrawImage(bitmapImage, new Rect(0, 0, bitmapImage.Width, bitmapImage.Height));

drawingContext.DrawText(formattedText, new Point(bitmapImage.Height / 2, 0));

drawingContext.Close();

RenderTargetBitmap renderTargetBitmap = new RenderTargetBitmap

(

bitmapImage.PixelWidth,

bitmapImage.PixelHeight,

96,

PixelFormats.Pbgra32

);

renderTargetBitmap.Render(drawingVisual);

PngBitmapEncoder encoder = new PngBitmapEncoder();

encoder.Frames.Add(BitmapFrame.Create(renderTargetBitmap));

using(FileStream stream = File.Create("target.png"))

{

encoder.Save(stream);

}

#endregion

}

TestProject.zip