Xử lý Bitmap, Color trong lập trình C#

[huongcao]

HÌnh mẫu :


Source Code :

using System;using System.Drawing;using System.Drawing.Drawing2D;using System.Drawing.Imaging;using System.Collections;using System.ComponentModel;using System.Windows.Forms;using System.Data; namespace BitmapColor_c{    /// <summary>    /// Summary description for Form1.    /// </summary>    public class BitmapColor : System.Windows.Forms.Form    {        /// <summary>        /// Required designer variable.        /// </summary>        private System.ComponentModel.Container components = null;         public BitmapColor()        {            //            // Required for Windows Form Designer support            //            InitializeComponent();             //            // TODO: Add any constructor code after InitializeComponent call            //        }         /// <summary>        /// Clean up any resources being used.        /// </summary>        protected override void Dispose( bool disposing )        {            if( disposing )            {                if (components != null)                 {                    components.Dispose();                }            }            base.Dispose( disposing );        }         /// <summary>        /// Required method for Designer support - do not modify        /// the contents of this method with the code editor.        /// </summary>        private void InitializeComponent()        {      //       // Form1      //       this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);      this.ClientSize = new System.Drawing.Size(292, 273);      this.Name = "Form1";      this.Text = "Form1";      this.Load += new System.EventHandler(this.Form1_Load);         }          /// <summary>        /// The main entry point for the application.        /// </summary>        [STAThread]        static void Main()         {            Application.Run(new BitmapColor());        }            private void Form1_Load(object sender, System.EventArgs e)        {          ColorPalette cp;          String s;          Bitmap bmp = new Bitmap("crane.jpg");              cp = bmp.Palette;              foreach (Color c in cp.Entries)          {            s = c.ToString();          }                }            protected override void OnPaint(PaintEventArgs e)        {          Bitmap bmp = new Bitmap("crane.jpg");          Color c;              e.Graphics.DrawImage( bmp, 10, 30 );              for ( int x=0; x<bmp.Width-1; x++ )          {            for ( int y=0; y<bmp.Height-1; y++ )            {              c = bmp.GetPixel( x, y );              c = Color.FromArgb( c.ToArgb() + 100 );              bmp.SetPixel( x, y, c );            }          }          e.Graphics.DrawImage( bmp, 150, 30 );        }    }}

Ở đây file : "crane.jpg" là của mình ; bạn thay vào bằng hình của bạn

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[hongson1992]

Hình mẫu :


Source Code :

using System;using System.Drawing;using System.Drawing.Drawing2D;using System.Drawing.Imaging;using System.Collections;using System.ComponentModel;using System.Windows.Forms;using System.Data; namespace BitMapExt_c{    /// <summary>    /// Summary description for Form1.    /// </summary>    public class BitMapExt : System.Windows.Forms.Form    {     #region Class Local Variables     private Bitmap WholeBMP;    private Bitmap SaveBMP;    private Bitmap TLBMP;    private Bitmap TRBMP;    private Bitmap BLBMP;    private Bitmap BRBMP;     private Rectangle DrawRect;    private Point TLpt;    private Point TRpt;    private Point BLpt;    private Point BRpt;    private int Counter = 0;     private ImageAttributes Ia;     #endregion     private System.ComponentModel.IContainer components;    private System.Windows.Forms.Timer T1;     private System.Windows.Forms.Button cmdGo;       public BitMapExt() {            InitializeComponent();       this.SetStyle(ControlStyles.DoubleBuffer, true);      this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);       WholeBMP = new Bitmap("crane.jpg");      DrawRect = new Rectangle(0, 0, WholeBMP.Width, WholeBMP.Height);      DrawRect.X = this.Width/2 - WholeBMP.Width/2;      DrawRect.Y = this.Height/2 - WholeBMP.Height/2;      T1.Interval = 75;      T1.Enabled = false;    }         protected override void Dispose( bool disposing )        {            if( disposing )            {                if (components != null)                 {                    components.Dispose();                }            }      if (WholeBMP != null)        WholeBMP.Dispose();       if (SaveBMP != null)        SaveBMP.Dispose();      if (TLBMP != null)        TLBMP.Dispose();      if (TRBMP != null)        TRBMP.Dispose();      if (BLBMP != null)        BLBMP.Dispose();      if (BRBMP != null)        BRBMP.Dispose();      if (Ia != null)        Ia.Dispose();            base.Dispose( disposing );        }         #region Windows Form Designer generated code        /// <summary>        /// Required method for Designer support - do not modify        /// the contents of this method with the code editor.        /// </summary>        private void InitializeComponent()        {      this.components = new System.ComponentModel.Container();      this.cmdGo = new System.Windows.Forms.Button();      this.T1 = new System.Windows.Forms.Timer(this.components);      this.SuspendLayout();      //       // cmdGo      //       this.cmdGo.Location = new System.Drawing.Point(328, 336);      this.cmdGo.Name = "cmdGo";      this.cmdGo.Size = new System.Drawing.Size(48, 24);      this.cmdGo.TabIndex = 0;      this.cmdGo.Text = "GO";      this.cmdGo.Click += new System.EventHandler(this.Explode);      //       // T1      //       this.T1.Tick += new System.EventHandler(this.T1_Tick);      //       // Form1      //       this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);      this.ClientSize = new System.Drawing.Size(392, 373);      this.Controls.AddRange(new System.Windows.Forms.Control[] {                                                                  this.cmdGo});      this.MaximizeBox = false;      this.MinimizeBox = false;      this.Name = "Form1";      this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;      this.Text = "Exploding Bitmap";      this.Load += new System.EventHandler(this.Form1_Load);      this.ResumeLayout(false);     }        #endregion         [STAThread]        static void Main()         {            Application.Run(new BitMapExt());        }     private void Form1_Load(object sender, System.EventArgs e)    {    }     protected override void OnPaint(PaintEventArgs e)    {      Graphics G = e.Graphics;       if ( WholeBMP != null )          {        G.DrawImage(WholeBMP, DrawRect);        return;      }            if ( TLBMP != null )        G.DrawImage( TLBMP, new Rectangle(TLpt, TLBMP.Size),          0, 0,          TLBMP.Width, TLBMP.Height,          GraphicsUnit.Pixel,           Ia );       if ( TRBMP != null )        G.DrawImage( TRBMP, new Rectangle(TRpt, TRBMP.Size),          0, 0,          TRBMP.Width, TRBMP.Height,          GraphicsUnit.Pixel,           Ia );            if ( BLBMP != null )        G.DrawImage( BLBMP, new Rectangle(BLpt, BLBMP.Size),          0, 0,          BLBMP.Width, BLBMP.Height,          GraphicsUnit.Pixel,           Ia );            if ( BRBMP != null )        G.DrawImage( BRBMP, new Rectangle(BRpt, BRBMP.Size),          0, 0,          BRBMP.Width, BRBMP.Height,          GraphicsUnit.Pixel,           Ia );      }     private void Explode(object sender, System.EventArgs e)    {      if ( WholeBMP != null )      {        cmdGo.Enabled = false;        int L = 0;        int T = 0;        int Cx = (int)(WholeBMP.Width/2);        int Cy = (int)(WholeBMP.Height/2);         Rectangle R1 = new Rectangle( L, T, Cx, Cy );        Rectangle R2 = new Rectangle( Cx, T, Cx, Cy );        Rectangle R3 = new Rectangle( L, Cy, Cx, Cy );        Rectangle R4 = new Rectangle( Cx, Cy, Cx, Cy );         SaveBMP = WholeBMP;        TLBMP = WholeBMP.Clone(new Rectangle( L, T, Cx, Cy ),                                 WholeBMP.PixelFormat);        TRBMP = WholeBMP.Clone(new Rectangle( Cx, T, Cx, Cy ),                                 WholeBMP.PixelFormat);        BLBMP = WholeBMP.Clone(new Rectangle( L, Cy, Cx, Cy ),                                 WholeBMP.PixelFormat);        BRBMP = WholeBMP.Clone(new Rectangle( Cx, Cy, Cx, Cy ),                                 WholeBMP.PixelFormat);        WholeBMP = null;                int Gap = 10;        TLpt = new Point( DrawRect.Left-Gap, DrawRect.Top-Gap );        TRpt = new Point( DrawRect.Left+Cx+Gap, DrawRect.Top-Gap );        BLpt = new Point( DrawRect.Left-Gap, DrawRect.Top+Cy+Gap );        BRpt = new Point( DrawRect.Left+Cx+Gap, DrawRect.Top+Cy+Gap );         T1.Enabled = true;        Invalidate();      }    }     private void T1_Tick(object sender, System.EventArgs e)    {      Counter += 1;      if ( Counter == 62 )      {        Counter = 0;        cmdGo.Enabled = true;        T1.Enabled = false;        WholeBMP = SaveBMP;      }       TLpt.X-=1;      TLpt.Y-=1;       TRpt.X+=1;      TRpt.Y-=1;       BLpt.X-=1;      BLpt.Y+=1;       BRpt.X+=1;      BRpt.Y+=1;       // Initialize a color matrix.      //Set the alpha for the whole image      float[][] m ={new float[] {1, 0, 0, 0, 0},                    new float[] {0, 1, 0, 0, 0},                    new float[] {0, 0, 1, 0, 0},                    new float[] {0, 0, 0, (1-(float)Counter/62), 0},                     new float[] {0, 0, 0, 0, 1}};       ColorMatrix cm = new ColorMatrix(m);       // Create an ImageAttributes object and set its color matrix.      Ia = new ImageAttributes();      Ia.SetColorMatrix( cm, ColorMatrixFlag.Default,                               ColorAdjustType.Bitmap);       TLBMP.RotateFlip(RotateFlipType.Rotate90FlipNone);      TRBMP.RotateFlip(RotateFlipType.Rotate90FlipNone);      BLBMP.RotateFlip(RotateFlipType.Rotate90FlipNone);      BRBMP.RotateFlip(RotateFlipType.Rotate90FlipNone);       Invalidate();    }    }}

[artdeco113]

Hình mẫu :


Source Code :

using System;using System.Drawing;using System.Drawing.Drawing2D;using System.Drawing.Imaging;using System.Collections;using System.ComponentModel;using System.Windows.Forms;using System.Data; namespace BitmapOther_c{    /// <summary>    /// Summary description for BitmapOther.    /// </summary>  public class BitmapOther : System.Windows.Forms.Form  {    /// <summary>    /// Required designer variable.    /// </summary>    private System.ComponentModel.Container components = null;     public BitmapOther()    {      //      // Required for Windows Form Designer support      //      InitializeComponent();       //      // TODO: Add any constructor code after InitializeComponent call      //    }     /// <summary>    /// Clean up any resources being used.    /// </summary>    protected override void Dispose( bool disposing )    {      if( disposing )      {        if (components != null)         {          components.Dispose();        }      }      base.Dispose( disposing );    }         #region Windows Form Designer generated code    /// <summary>    /// Required method for Designer support - do not modify    /// the contents of this method with the code editor.    /// </summary>    private void InitializeComponent()    {      //       // BitmapOther      //       this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);      this.ClientSize = new System.Drawing.Size(292, 273);      this.Name = "BitmapOther";      this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;      this.Text = "BitmapOther";      this.Load += new System.EventHandler(this.BitmapOther_Load);     }        #endregion     /// <summary>    /// The main entry point for the application.    /// </summary>    [STAThread]    static void Main()     {      Application.Run(new BitmapOther());    }     private void BitmapOther_Load(object sender, System.EventArgs e)    {        }     protected override void OnPaint ( PaintEventArgs e )    {      Bitmap BMP = new Bitmap("Colorbars.JPG");      Point Pt = new Point(20,20);    //   BMP.SetPixel(15,20,Color.Black);      BMP.MakeTransparent( BMP.GetPixel(15,25) );       e.Graphics.DrawImage(BMP, Pt);      e.Graphics.DrawLine(new Pen(Brushes.GreenYellow,30),60,60,200,60);            }   }}

[BichNgoc101]

Thấy bạn pro quá, k biết bạn có thể giúp mình cái này được không, mình đang đau đầu về cái canvas trong C#, mình tìm tài liệu về nó mà không thấy, nếu tiện thì bạn giúp mình nha. Thank bạn nhìu.