■ Bitmap 클래스를 사용해 ARGB 색상 채널을 교환하는 방법을 보여준다.
▶ ColorSwapType.cs
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namespace TestProject { /// <summary> /// 색상 교환 타입 /// </summary> public enum ColorSwapType { /// <summary> /// ShiftRight /// </summary> ShiftRight, /// <summary> /// ShiftLeft /// </summary> ShiftLeft, /// <summary> /// SwapBlueAndRed /// </summary> SwapBlueAndRed, /// <summary> /// SwapBlueAndGreen /// </summary> SwapBlueAndGreen, /// <summary> /// SwapRedAndGreen /// </summary> SwapRedAndGreen } } |
▶ ColorSwapFilter.cs
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namespace TestProject { /// <summary> /// 색상 교환 필터 /// </summary> public class ColorSwapFilter { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 색상 교환 타입 /// </summary> private ColorSwapType swapType = ColorSwapType.ShiftRight; /// <summary> /// 중간 색상 값 교환 여부 /// </summary> private bool swapHalfColorValue = false; /// <summary> /// 교환시 색상 반전 여부 /// </summary> private bool invertColorWhenSwapping = false; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Public #region 색상 교환 타입 - SwapType /// <summary> /// 색상 교환 타입 /// </summary> public ColorSwapType SwapType { get { return this.swapType; } set { this.swapType = value; } } #endregion #region 중간 색상 값 교환 여부 - SwapHalfColorValue /// <summary> /// 중간 색상 값 교환 여부 /// </summary> public bool SwapHalfColorValue { get { return this.swapHalfColorValue; } set { this.swapHalfColorValue = value; } } #endregion #region 교환시 색상 반전 여부 - InvertColorWhenSwapping /// <summary> /// 교환시 색상 반전 여부 /// </summary> public bool InvertColorWhenSwapping { get { return this.invertColorWhenSwapping; } set { this.invertColorWhenSwapping = value; } } #endregion } } |
▶ BitmapHelper.cs
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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 색상 교환하기 - SwapColor(sourceBitmap, colorSwapFilter) /// <summary> /// 색상 교환하기 /// </summary> /// <param name="sourceBitmap">소스 비트맵</param> /// <param name="colorSwapFilter">색상 교환 필터</param> /// <returns>비트맵</returns> public static Bitmap SwapColor(Bitmap sourceBitmap, ColorSwapFilter colorSwapFilter) { BitmapData sourceBitmapData = sourceBitmap.LockBits ( new Rectangle(0, 0, sourceBitmap.Width, sourceBitmap.Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb ); byte[] targetByteArray = new byte[sourceBitmapData.Stride * sourceBitmapData.Height]; Marshal.Copy(sourceBitmapData.Scan0, targetByteArray, 0, targetByteArray.Length); sourceBitmap.UnlockBits(sourceBitmapData); byte sourceBlue = 0; byte sourceGreen = 0; byte sourceRed = 0; byte targetBlue = 0; byte targetGreen = 0; byte targetRed = 0; byte byte2 = 2; byte maximumValue = 255; for(int k = 0; k < targetByteArray.Length; k += 4) { sourceBlue = targetByteArray[k ]; sourceGreen = targetByteArray[k + 1]; sourceRed = targetByteArray[k + 2]; if(colorSwapFilter.InvertColorWhenSwapping) { sourceBlue = (byte)(maximumValue - sourceBlue ); sourceGreen = (byte)(maximumValue - sourceGreen); sourceRed = (byte)(maximumValue - sourceRed ); } if(colorSwapFilter.SwapHalfColorValue) { sourceBlue = (byte)(sourceBlue / byte2); sourceGreen = (byte)(sourceGreen / byte2); sourceRed = (byte)(sourceRed / byte2); } switch(colorSwapFilter.SwapType) { case ColorSwapType.ShiftRight : { targetBlue = sourceGreen; targetRed = sourceBlue; targetGreen = sourceRed; break; } case ColorSwapType.ShiftLeft : { targetBlue = sourceRed; targetRed = sourceGreen; targetGreen = sourceBlue; break; } case ColorSwapType.SwapBlueAndRed: { targetBlue = sourceRed; targetRed = sourceBlue; break; } case ColorSwapType.SwapBlueAndGreen : { targetBlue = sourceGreen; targetGreen = sourceBlue; break; } case ColorSwapType.SwapRedAndGreen : { targetRed = sourceGreen; targetGreen = sourceGreen; break; } } targetByteArray[k ] = targetBlue; targetByteArray[k + 1] = targetGreen; targetByteArray[k + 2] = targetRed; } Bitmap targetBitmap = new Bitmap ( sourceBitmap.Width, sourceBitmap.Height, PixelFormat.Format32bppArgb ); 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 } } |
▶ MainForm.cs
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using System; using System.Drawing; using System.Drawing.Imaging; using System.IO; 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.colorFilterTypeComboBox.Items.Add(ColorSwapType.ShiftLeft ); this.colorFilterTypeComboBox.Items.Add(ColorSwapType.ShiftRight ); this.colorFilterTypeComboBox.Items.Add(ColorSwapType.SwapBlueAndGreen); this.colorFilterTypeComboBox.Items.Add(ColorSwapType.SwapBlueAndRed ); this.colorFilterTypeComboBox.Items.Add(ColorSwapType.SwapRedAndGreen ); this.colorFilterTypeComboBox.SelectedIndex = 0; this.colorFilterTypeComboBox.SelectedIndexChanged += colorFilterTypeComboBox_SelectedIndexChanged; this.invertColorCheckBox.CheckedChanged += invertColorCheckBox_CheckedChanged; this.swapHalfColorCheckBox.CheckedChanged += swapHalfColorCheckBox_CheckedChanged; this.loadImageButton.Click += loadImageButton_Click; this.saveImageButton.Click += saveImageButton_Click; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private //////////////////////////////////////////////////////////////////////////////// Event #region 색상 필터 타입 콤보 박스 선택 인덱스 변경시 처리하기 - colorFilterTypeComboBox_SelectedIndexChanged(sender, e) /// <summary> /// 색상 필터 타입 콤보 박스 선택 인덱스 변경시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void colorFilterTypeComboBox_SelectedIndexChanged(object sender, EventArgs e) { ApplyFilter(); } #endregion #region 색상 반전 체크 박스 체크 변경시 처리하기 - invertColorCheckBox_CheckedChanged(sender, e) /// <summary> /// 색상 반전 체크 박스 체크 변경시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void invertColorCheckBox_CheckedChanged(object sender, EventArgs e) { ApplyFilter(); } #endregion #region 중간 색상 교환 체크 박스 체크 변경시 처리하기 - swapHalfColorCheckBox_CheckedChanged(sender, e) /// <summary> /// 중간 색상 교환 체크 박스 체크 변경시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void swapHalfColorCheckBox_CheckedChanged(object sender, EventArgs e) { ApplyFilter(); } #endregion #region 이미지 로드 버튼 클릭시 처리하기 - loadImageButton_Click(sender, e) /// <summary> /// 이미지 로드 버튼 클릭시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void loadImageButton_Click(object sender, EventArgs e) { OpenFileDialog openFileDialog = new OpenFileDialog(); openFileDialog.Title = "이미지 파일 선택"; openFileDialog.Filter = "PNG 파일 (*.png)|*.png|비트맵 파일 (*.bmp)|*.bmp|JPEG 파일 (*.jpg)|*.jpg"; if(openFileDialog.ShowDialog() == DialogResult.OK) { StreamReader streamReader = new StreamReader(openFileDialog.FileName); Bitmap sourceBitmap = (Bitmap)Bitmap.FromStream(streamReader.BaseStream); streamReader.Close(); this.sourcePictureBox.Image = sourceBitmap; ApplyFilter(); } } #endregion #region 이미지 저장 버튼 클릭시 처리하기 - saveImageButton_Click(sender, e) /// <summary> /// 이미지 저장 버튼 클릭시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void saveImageButton_Click(object sender, EventArgs e) { if(this.targetPictureBox.Image != null) { SaveFileDialog saveFileDialog = new SaveFileDialog(); saveFileDialog.Title = "이미지 파일 선택"; saveFileDialog.Filter = "PNG 파일 (*.png)|*.png|비트맵 파일 (*.bmp)|*.bmp|JPEG 파일 (*.jpg)|*.jpg"; if(saveFileDialog.ShowDialog() == DialogResult.OK) { string fileExtension = Path.GetExtension(saveFileDialog.FileName).ToUpper(); ImageFormat imageFormat = ImageFormat.Png; if(fileExtension == "BMP") { imageFormat = ImageFormat.Bmp; } else if(fileExtension == "JPG") { imageFormat = ImageFormat.Jpeg; } StreamWriter streamWriter = new StreamWriter(saveFileDialog.FileName, false); this.targetPictureBox.Image.Save(streamWriter.BaseStream, imageFormat); streamWriter.Flush(); streamWriter.Close(); } } } #endregion //////////////////////////////////////////////////////////////////////////////// Function #region 필터 적용하기 - ApplyFilter() /// <summary> /// 필터 적용하기 /// </summary> private void ApplyFilter() { if(this.sourcePictureBox.Image != null) { ColorSwapFilter colorSwapFilter = new ColorSwapFilter(); colorSwapFilter.SwapType = (ColorSwapType)this.colorFilterTypeComboBox.SelectedItem; colorSwapFilter.InvertColorWhenSwapping = this.invertColorCheckBox.Checked; colorSwapFilter.SwapHalfColorValue = this.swapHalfColorCheckBox.Checked; Bitmap sourceBitmap = this.sourcePictureBox.Image as Bitmap; this.targetPictureBox.Image = BitmapHelper.SwapColor(sourceBitmap, colorSwapFilter); } } #endregion } } |
