■ Bitmap 클래스를 사용해 비트맵을 자르는 방법을 보여준다. (Shear)
▶ BitmapHelper.cs
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using System; using System.Drawing; using System.Drawing.Imaging; using System.Runtime.InteropServices; namespace TestProject { /// <summary> /// 비트맵 헬퍼 /// </summary> public static class BitmapHelper { //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Static //////////////////////////////////////////////////////////////////////////////// Public #region 비트맵 로드하기 - LoadBitmap(filePath) /// <summary> /// 비트맵 로드하기 /// </summary> /// <param name="filePath">파일 경로</param> /// <returns>비트맵</returns> public static Bitmap LoadBitmap(string filePath) { using(Bitmap bitmap = new Bitmap(filePath)) { return new Bitmap(bitmap); } } #endregion #region 비트맵 자르기 - ShearBitmap(sourceBitmap, shearX, shearY) /// <summary> /// 비트맵 자르기 /// </summary> /// <param name="sourceBitmap">소스 비트맵</param> /// <param name="shearX">자르기 X</param> /// <param name="shearY">자르기 Y</param> /// <returns>비트맵</returns> public static Bitmap ShearBitmap(Bitmap sourceBitmap, double shearX, double shearY) { BitmapData sourceBitmapData = sourceBitmap.LockBits ( new Rectangle(0, 0, sourceBitmap.Width, sourceBitmap.Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb ); byte[] sourceByteArray = new byte[sourceBitmapData.Stride * sourceBitmapData.Height]; byte[] targetByteArray = new byte[sourceBitmapData.Stride * sourceBitmapData.Height]; Marshal.Copy(sourceBitmapData.Scan0, sourceByteArray, 0, sourceByteArray.Length); sourceBitmap.UnlockBits(sourceBitmapData); int xOffset = (int )Math.Round(sourceBitmap.Width * shearX / 2.0); int yOffset = (int )Math.Round(sourceBitmap.Height * shearY / 2.0); int sourceXY = 0; int targetXY = 0; Point sourcePoint = new Point(); Point targetPoint = new Point(); Rectangle sourceRectangle = new Rectangle(0, 0, sourceBitmap.Width, sourceBitmap.Height); for(int y = 0; y < sourceBitmap.Height; y++) { for(int x = 0; x < sourceBitmap.Width; x++) { sourceXY = y * sourceBitmapData.Stride + x * 4; sourcePoint.X = x; sourcePoint.Y = y; if(sourceXY >= 0 && sourceXY + 3 < sourceByteArray.Length) { targetPoint = ShearXY(sourcePoint, shearX, shearY, xOffset, yOffset); targetXY = targetPoint.Y * sourceBitmapData.Stride + targetPoint.X * 4; if(sourceRectangle.Contains(targetPoint) && targetXY >= 0) { if(targetXY + 6 <= targetByteArray.Length) { targetByteArray[targetXY + 4] = sourceByteArray[sourceXY ]; targetByteArray[targetXY + 5] = sourceByteArray[sourceXY + 1]; targetByteArray[targetXY + 6] = sourceByteArray[sourceXY + 2]; targetByteArray[targetXY + 7] = 255; } if(targetXY - 3 >= 0) { targetByteArray[targetXY - 4] = sourceByteArray[sourceXY ]; targetByteArray[targetXY - 3] = sourceByteArray[sourceXY + 1]; targetByteArray[targetXY - 2] = sourceByteArray[sourceXY + 2]; targetByteArray[targetXY - 1] = 255; } if(targetXY + 3 < targetByteArray.Length) { targetByteArray[targetXY ] = sourceByteArray[sourceXY ]; targetByteArray[targetXY + 1] = sourceByteArray[sourceXY + 1]; targetByteArray[targetXY + 2] = sourceByteArray[sourceXY + 2]; targetByteArray[targetXY + 3] = 255; } } } } } Bitmap targetBitmap = new Bitmap(sourceBitmap.Width, sourceBitmap.Height); BitmapData targetBitmapData = targetBitmap.LockBits ( new Rectangle(0, 0, targetBitmap.Width, targetBitmap.Height), ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb ); Marshal.Copy(targetByteArray, 0, targetBitmapData.Scan0, targetByteArray.Length); targetBitmap.UnlockBits(targetBitmapData); return targetBitmap; } #endregion //////////////////////////////////////////////////////////////////////////////// Private #region XY 자르기 - ShearXY(sourcePoint, shearX, shearY, offsetX, offsetY) /// <summary> /// XY 자르기 /// </summary> /// <param name="sourcePoint">소스 포인트</param> /// <param name="shearX">자르기 X</param> /// <param name="shearY">자르기 Y</param> /// <param name="offsetX">오프셋 X</param> /// <param name="offsetY">오프셋 Y</param> /// <returns>포인트</returns> private static Point ShearXY(Point sourcePoint, double shearX, double shearY, int offsetX, int offsetY) { Point targetPoint = new Point(); targetPoint.X = (int)(Math.Round(sourcePoint.X + shearX * sourcePoint.Y)); targetPoint.X -= offsetX; targetPoint.Y = (int)(Math.Round(sourcePoint.Y + shearY * sourcePoint.X)); targetPoint.Y -= offsetY; return targetPoint; } #endregion } } |
▶ MainForm.cs
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using System.Drawing; 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(); Bitmap sourceBitmap = BitmapHelper.LoadBitmap("IMAGE\\sample.jpg"); Bitmap targetBitmap = BitmapHelper.ShearBitmap(sourceBitmap, 0.0, 1.0); this.pictureBox.SizeMode = PictureBoxSizeMode.Zoom; this.pictureBox.Image = targetBitmap; } #endregion } } |
