■ ImageAttributes 클래스를 사용해 투명 비트맵을 구하는 방법을 보여준다.
▶ MainForm.cs
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using System.Drawing; using System.Drawing.Drawing2D; using System.Drawing.Imaging; using System.Windows.Forms; namespace TestProject { /// <summary> /// 메인 폼 /// </summary> public partial class MainForm : Form { //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainForm() /// <summary> /// 생성자 /// </summary> public MainForm() { InitializeComponent(); this.sourcePictureBox.SizeMode = PictureBoxSizeMode.Zoom; this.sourcePictureBox.Image = Properties.Resources.sample; this.targetPictureBox.SizeMode = PictureBoxSizeMode.Zoom; this.sourcePictureBox.MouseDown += sourcePictureBox_MouseDown; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private //////////////////////////////////////////////////////////////////////////////// Event #region 소스 픽처 박스 마우스 DOWN 처리하기 - sourcePictureBox_MouseDown(sender, e) /// <summary> /// 소스 픽처 박스 마우스 DOWN 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void sourcePictureBox_MouseDown(object sender, MouseEventArgs e) { Point screenPoint = PointToScreen(e.Location); Color color = GetMousePointColor(screenPoint); Bitmap targetBitmap = GetTransparentBitmap(this.sourcePictureBox.Image as Bitmap, color); this.targetPictureBox.Image = targetBitmap; } #endregion //////////////////////////////////////////////////////////////////////////////// Event #region 마우스 위치 색상 구하기 - GetMousePointColor(mousePoint) /// <summary> /// 마우스 위치 색상 구하기 /// </summary> /// <param name="mousePoint">마우스 위치</param> /// <returns>마우스 위치 색상</returns> private Color GetMousePointColor(Point mousePoint) { Size size = new Size(1, 1); Bitmap bitmap = new Bitmap(1, 1); Graphics graphics = Graphics.FromImage(bitmap); graphics.CopyFromScreen(mousePoint.X, mousePoint.Y, 0, 0, size); return bitmap.GetPixel(0, 0); } #endregion #region 투명 비트맵 구하기 - GetTransparentBitmap(sourceBitmap, transparentColor) /// <summary> /// 투명 비트맵 구하기 /// </summary> /// <param name="sourceBitmap">소스 비트맵</param> /// <param name="transparentColor">투명 색상</param> /// <returns>투명 비트맵</returns> private Bitmap GetTransparentBitmap(Bitmap sourceBitmap, Color transparentColor) { ImageAttributes imageAttributes = new ImageAttributes(); imageAttributes.SetColorKey(transparentColor, transparentColor); int sourceWidth = sourceBitmap.Width; int sourceHeight = sourceBitmap.Height; Bitmap targetBitmap = new Bitmap(sourceWidth, sourceHeight); Graphics targetGraphics = Graphics.FromImage(targetBitmap); targetGraphics.Clear(Color.Transparent); targetGraphics.InterpolationMode = InterpolationMode.HighQualityBicubic; targetGraphics.PixelOffsetMode = PixelOffsetMode.HighQuality; Rectangle targetRectangle = new Rectangle(0, 0, sourceWidth, sourceHeight); targetGraphics.DrawImage ( sourceBitmap, targetRectangle, 0, 0, sourceWidth, sourceHeight, GraphicsUnit.Pixel, imageAttributes ); return targetBitmap; } #endregion } } |
