■ BitBlt 함수를 사용해 비트맵을 복사하는 방법을 보여준다.
▶ MainForm.cs
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using System; using System.Drawing; using System.Runtime.InteropServices; using System.Windows.Forms; namespace TestProject { /// <summary> /// 메인 폼 /// </summary> public partial class MainForm : Form { //////////////////////////////////////////////////////////////////////////////////////////////////// Import ////////////////////////////////////////////////////////////////////////////////////////// Static //////////////////////////////////////////////////////////////////////////////// Private #region 비트 복사하기 - BitBlt(targetHandle, targetX, targetY, targetWidth, targetHeight, sourceHandle, sourceX, sourceY, rasterOperation) /// <summary> /// 비트 복사하기 /// </summary> /// <param name="targetHandle">타겟 디바이스 컨텍스트 핸들</param> /// <param name="targetX">타겟 X</param> /// <param name="targetY">타겟 Y</param> /// <param name="targetWidth">타겟 너비</param> /// <param name="targetHeight">타겟 높이</param> /// <param name="sourceHandle">소스 디바이스 컨텍스트 핸들</param> /// <param name="sourceX">소스 X</param> /// <param name="sourceY">소스 Y</param> /// <param name="rasterOperation">래스터 작업</param> /// <returns>처리 결과</returns> [DllImport("gdi32")] private static extern int BitBlt(IntPtr targetHandle, int targetX, int targetY, int targetWidth, int targetHeight, IntPtr sourceHandle, int sourceX, int sourceY, int rasterOperation); #endregion #region 객체 선택하기 - SelectObject(targetHandle, sourceObjectHandle) /// <summary> /// 객체 선택하기 /// </summary> /// <param name="targetHandle">타겟 디바이스 컨텍스트 핸들</param> /// <param name="sourceObjectHandle">소스 객체 핸들</param> /// <returns>이전 객체</returns> [DllImport("gdi32.dll", EntryPoint = "SelectObject")] private static extern IntPtr SelectObject(IntPtr targetHandle, IntPtr sourceObjectHandle); #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// SRC_COPY /// </summary> private const int SRC_COPY = 0xcc0020; /// <summary> /// 사각형 비트맵 /// </summary> private Bitmap rectangleBitmap; /// <summary> /// X /// </summary> private int x = 50; /// <summary> /// Y /// </summary> private int y = 50; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainForm() /// <summary> /// 생성자 /// </summary> public MainForm() { InitializeComponent(); SetStyle(ControlStyles.DoubleBuffer , true); SetStyle(ControlStyles.AllPaintingInWmPaint, true); SetStyle(ControlStyles.UserPaint , true); Paint += Form_Paint; KeyDown += Form_KeyDown; Load += Form_Load; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private #region 폼 로드시 처리하기 - Form_Load(sender, e) /// <summary> /// 폼 로드시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void Form_Load(object sender, EventArgs e) { using(Graphics graphics = CreateGraphics()) { this.rectangleBitmap = new Bitmap(60, 60, graphics); using(Graphics bitmapGraphics = Graphics.FromImage(this.rectangleBitmap)) { bitmapGraphics.Clear(Color.White); bitmapGraphics.DrawRectangle(Pens.Blue, 0, 0, 59, 59); } } } #endregion #region 폼 키 DOWN 처리하기 - Form_KeyDown(sender, e) /// <summary> /// 폼 키 DOWN 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void Form_KeyDown(object sender, KeyEventArgs e) { if(e.KeyCode == Keys.Up) { this.y -= 10; } else if(e.KeyCode == Keys.Down) { this.y += 10; } else if(e.KeyCode == Keys.Left) { this.x -= 10; } else if(e.KeyCode == Keys.Right) { this.x += 10; } Invalidate(); } #endregion #region 폼 PAINT 처리하기 - Form_Paint(sender, e) /// <summary> /// 폼 PAINT 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void Form_Paint(object sender, PaintEventArgs e) { Graphics targetGraphics = e.Graphics; IntPtr targetDeviceContextHandle = targetGraphics.GetHdc(); using(Graphics sourceGraphics = Graphics.FromImage(this.rectangleBitmap)) { IntPtr sourceDeviceContextHandle = sourceGraphics.GetHdc(); IntPtr previousObject = SelectObject(sourceDeviceContextHandle, this.rectangleBitmap.GetHbitmap()); BitBlt(targetDeviceContextHandle, this.x, this.y, 60, 60, sourceDeviceContextHandle, 0, 0, SRC_COPY); sourceGraphics.ReleaseHdc(sourceDeviceContextHandle); if(previousObject != IntPtr.Zero) { SelectObject(sourceDeviceContextHandle, previousObject); } } targetGraphics.ReleaseHdc(targetDeviceContextHandle); } #endregion } } |
