■ 기준선을 사용해 이미지를 회전하는 방법을 보여준다.
▶ MainForm.cs
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using System; using System.Drawing; using System.Drawing.Drawing2D; using System.Drawing.Imaging; using System.IO; using System.Windows.Forms; namespace TestProject { /// <summary> /// 메인 폼 /// </summary> public partial class MainForm : Form { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 소스 비트맵 /// </summary> private Bitmap sourceBitmap = null; /// <summary> /// 타겟 비트맵 /// </summary> private Bitmap targetBitmap = null; /// <summary> /// 각도 /// </summary> private float angle = 0; /// <summary> /// 시작 포인트 /// </summary> private Point startPoint = new Point(50, 100); /// <summary> /// 종료 포인트 /// </summary> private Point endPoint = new Point(210, 100); /// <summary> /// 그리기 여부 /// </summary> private bool isDrawing = false; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainForm() /// <summary> /// 생성자 /// </summary> public MainForm() { InitializeComponent(); this.openMenuItem.Click += openMenuItem_Click; this.saveAsMenuItem.Click += saveAsMenuItem_Click; this.exitMenuItem.Click += exitMenuItem_Click; this.resetAngleMenuItem.Click += resetAngleMenuItem_Click; this.drawGridMenuItem.Click += drawGridMenuItem_Click; this.pictureBox.MouseDown += pictureBox_MouseDown; this.pictureBox.MouseMove += pictureBox_MouseMove; this.pictureBox.MouseUp += pictureBox_MouseUp; this.pictureBox.Paint += pictureBox_Paint; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private //////////////////////////////////////////////////////////////////////////////// Event #region 열기 메뉴 항목 클릭시 처리하기 - openMenuItem_Click(sender, e) /// <summary> /// 열기 메뉴 항목 클릭시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void openMenuItem_Click(object sender, EventArgs e) { if(this.openFileDialog.ShowDialog() == DialogResult.OK) { this.sourceBitmap = LoadBitmapUnlocked(this.openFileDialog.FileName); this.angle = 0; DrawImage(); } } #endregion #region 다른 이름으로 저장 메뉴 항목 클릭시 처리하기 - saveAsMenuItem_Click(sender, e) /// <summary> /// 다른 이름으로 저장 메뉴 항목 클릭시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void saveAsMenuItem_Click(object sender, EventArgs e) { if(this.saveFileDialog.ShowDialog() == DialogResult.OK) { SaveImage(this.targetBitmap, this.saveFileDialog.FileName); } } #endregion #region 종료 메뉴 항목 클릭시 처리하기 - exitMenuItem_Click(sender, e) /// <summary> /// 종료 메뉴 항목 클릭시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void exitMenuItem_Click(object sender, EventArgs e) { Close(); } #endregion #region 각도 리셋 메뉴 항목 클릭시 처리하기 - resetAngleMenuItem_Click(sender, e) /// <summary> /// 각도 리셋 메뉴 항목 클릭시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void resetAngleMenuItem_Click(object sender, EventArgs e) { this.angle = 0; this.startPoint = new Point(50, 100); this.endPoint = new Point(210, 100); DrawImage(); } #endregion #region 그리드 그리기 - drawGridMenuItem_Click(sender, e) /// <summary> /// 그리드 그리기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void drawGridMenuItem_Click(object sender, EventArgs e) { this.pictureBox.Refresh(); } #endregion #region 픽처 박스 마우스 DOWN 처리하기 - pictureBox_MouseDown(sender, e) /// <summary> /// 픽처 박스 마우스 DOWN 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void pictureBox_MouseDown(object sender, MouseEventArgs e) { this.startPoint = e.Location; this.endPoint = e.Location; this.isDrawing = true; } #endregion #region 픽처 박스 마우스 이동시 처리하기 - pictureBox_MouseMove(sender, e) /// <summary> /// 픽처 박스 마우스 이동시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void pictureBox_MouseMove(object sender, MouseEventArgs e) { if(!this.isDrawing) { return; } this.endPoint = e.Location; this.pictureBox.Refresh(); } #endregion #region 픽처 박스 마우스 UP 처리하기 - pictureBox_MouseUp(sender, e) /// <summary> /// 픽처 박스 마우스 UP 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void pictureBox_MouseUp(object sender, MouseEventArgs e) { this.isDrawing = false; int deltaX = this.endPoint.X - this.startPoint.X; int deltaY = this.endPoint.Y - this.startPoint.Y; double newAngle = Math.Atan2(deltaY, deltaX) * 180.0 / Math.PI; this.angle -= (float)newAngle; DrawImage(); } #endregion #region 픽처 박스 페인트시 처리하기 - pictureBox_Paint(sender, e) /// <summary> /// 픽처 박스 페인트시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void pictureBox_Paint(object sender, PaintEventArgs e) { if(this.isDrawing) { e.Graphics.SmoothingMode = SmoothingMode.AntiAlias; e.Graphics.DrawLine(Pens.Yellow, this.startPoint, this.endPoint); using(Pen pen = new Pen(Color.Red)) { pen.DashPattern = new float[] { 5, 5 }; e.Graphics.DrawLine(pen, this.startPoint, this.endPoint); } } if(this.drawGridMenuItem.Checked) { const int deltaX = 50; int maximumX = this.pictureBox.ClientSize.Width; int maximumY = this.pictureBox.ClientSize.Height; for(int x = 0; x < maximumX; x += deltaX) { e.Graphics.DrawLine(Pens.Silver, x, 0, x, maximumY); } for(int y = 0; y < maximumY; y += deltaX) { e.Graphics.DrawLine(Pens.Silver, 0, y, maximumX, y); } } } #endregion //////////////////////////////////////////////////////////////////////////////// Function #region 잠금없이 비트맵 로드하기 - LoadBitmapUnlocked(filePath) /// <summary> /// 잠금없이 비트맵 로드하기 /// </summary> /// <param name="filePath">파일 경로</param> /// <returns>비트맵</returns> private Bitmap LoadBitmapUnlocked(string filePath) { using(Bitmap bitmap = new Bitmap(filePath)) { return new Bitmap(bitmap); } } #endregion #region 이미지 저장하기 - SaveImage(image, filePath) /// <summary> /// 이미지 저장하기 /// </summary> /// <param name="image">이미지</param> /// <param name="filePath">파일 경로</param> public void SaveImage(Image image, string filePath) { string extension = Path.GetExtension(filePath); switch(extension.ToLower()) { case ".bmp" : image.Save(filePath, ImageFormat.Bmp ); break; case ".exif" : image.Save(filePath, ImageFormat.Exif); break; case ".gif" : image.Save(filePath, ImageFormat.Gif ); break; case ".jpg" : case ".jpeg" : image.Save(filePath, ImageFormat.Jpeg); break; case ".png" : image.Save(filePath, ImageFormat.Png ); break; case ".tif" : case ".tiff" : image.Save(filePath, ImageFormat.Tiff); break; default : throw new NotSupportedException("Unknown file extension " + extension); } } #endregion #region 이미지 그리기 - DrawImage() /// <summary> /// 이미지 그리기 /// </summary> private void DrawImage() { if(this.sourceBitmap == null) { this.pictureBox.Refresh(); return; } int width = this.sourceBitmap.Width; int height = this.sourceBitmap.Height; Matrix matrix = new Matrix(); matrix.Rotate(this.angle); PointF[] pointArray = { new PointF(0 , 0 ), new PointF(width, 0 ), new PointF(0 , height), new PointF(width, height) }; matrix.TransformPoints(pointArray); float minimumX = pointArray[0].X; float maximumX = minimumX; float minimumY = pointArray[0].Y; float maximumY = minimumY; for(int i = 1; i < pointArray.Length; i++) { if(minimumX > pointArray[i].X) minimumX = pointArray[i].X; if(maximumX < pointArray[i].X) maximumX = pointArray[i].X; if(minimumY > pointArray[i].Y) minimumY = pointArray[i].Y; if(maximumY < pointArray[i].Y) maximumY = pointArray[i].Y; } float newWidth = maximumX - minimumX; float newHeight = maximumY - minimumY; matrix.Translate(newWidth / 2, newHeight / 2, MatrixOrder.Append); this.targetBitmap = new Bitmap((int)newWidth, (int)newHeight); using(Graphics graphics = Graphics.FromImage(this.targetBitmap)) { graphics.InterpolationMode = InterpolationMode.High; graphics.Clear(Color.White); graphics.Transform = matrix; PointF[] targetPointArray = { new PointF(-width / 2, -height / 2), new PointF( width / 2, -height / 2), new PointF(-width / 2, height / 2) }; graphics.DrawImage(sourceBitmap, targetPointArray); } this.pictureBox.Image = this.targetBitmap; } #endregion } } |
