Csharp/C Sharp/2D Graphics/Bitmap

Содержание

1 Bitmap.HorizontalResolution
2 Bitmap property: Height, Physical Dimension, width, raw format and size
3 Bitmap.SetResolution
4 Bit operation with PixelFormat.Alpha
5 Create a Bitmap image in memory and set its CompositingMode
6 Create a green color with an alpha component then draw a green rectangle to the bitmap in memory
7 Create a red color with an alpha component then draw a red circle to the bitmap in memory
8 Create Graphics object From Image
9 Create your own BitMap
10 Double buffer with Bitmap
11 Draw an array of images
12 Draw on an Bitmap
13 Draw shapes to the bitmap in memory
14 new Bitmap(bitmap, size)
15 PixelFormat.DontCare
16 Read Bitmap Size by using BinaryReader
17 Resize the Bitmap using the highest quality interpolation mode
18 Resize the Bitmap using the lowest quality interpolation mode
19 Use a color matrix to change the color properties of the image
20 write the pixel information to the console window

Bitmap.HorizontalResolution

<source lang="csharp"> using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; public class Form1 : Form {

   protected override void OnPaint(PaintEventArgs e) {
   Graphics g = e.Graphics;
   Bitmap bmp = new Bitmap("rama.jpg");
   g.DrawImage(bmp, 0, 0);
   Console.WriteLine("Screen resolution: " + g.DpiX + "DPI");
   Console.WriteLine("Image resolution: " + bmp.HorizontalResolution + "DPI");
   Console.WriteLine("Image Width: " + bmp.Width);
   Console.WriteLine("Image Height: " + bmp.Height);
   SizeF s = new SizeF(bmp.Width * (g.DpiX / bmp.HorizontalResolution),
             bmp.Height * (g.DpiY / bmp.VerticalResolution));
   Console.WriteLine("Display size of image: " + s);
   }
   public static void Main() {
       Application.Run(new Form1());
   }

}

</source>

Bitmap property: Height, Physical Dimension, width, raw format and size

<source lang="csharp"> using System; using System.IO; using System.Drawing;

class MainClass {

   static public void Main()
   {
       Bitmap img = new Bitmap("winter.jpg");
       
       Console.WriteLine(img.PhysicalDimension.ToString() );
       Console.WriteLine(img.Height.ToString() );
       Console.WriteLine(img.Width.ToString() );
       Console.WriteLine(img.RawFormat.ToString() );
       Console.WriteLine(img.Size.ToString() );
   }

}

      </source>

Bitmap.SetResolution

<source lang="csharp"> using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; public class Form1 : Form {

   protected override void OnPaint(PaintEventArgs e) {
   Graphics g = e.Graphics;
   Bitmap bmp = new Bitmap("rama.jpg");
   g.FillRectangle(Brushes.White, this.ClientRectangle);
   bmp.SetResolution(600f, 600f);
   g.DrawImage(bmp, 0, 0);
   bmp.SetResolution(1200f, 1200f);
   g.DrawImage(bmp, 180, 0);
   }
   public static void Main() {
       Application.Run(new Form1());
   }

}

</source>

Bit operation with PixelFormat.Alpha

<source lang="csharp"> using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Drawing.Drawing2D; using System.Drawing.Imaging; using System.Text; using System.Windows.Forms; public class MainClass {

   public static void Main() {
       // Create two new bitmap images
       Bitmap bmp1 = new Bitmap(100, 100, PixelFormat.Format32bppArgb);
       Bitmap bmp2 = new Bitmap(100, 100, PixelFormat.Format24bppRgb);
       // Test for alpha 
       bool b1 = ((bmp1.PixelFormat & PixelFormat.Alpha) != 0);
       bool b2 = ((bmp2.PixelFormat & PixelFormat.Alpha) != 0);
       // Output results to console window
       Console.WriteLine("bmp1 has alpha?: " + b1);
       Console.WriteLine("bmp2 has alpha?: " + b2);
       // Clean up
       bmp1.Dispose();
       bmp2.Dispose();
   }

}

</source>

Create a Bitmap image in memory and set its CompositingMode

using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; public class Form1 : Form {

   protected override void OnPaint(PaintEventArgs e) {
   Graphics gForm = e.Graphics;
   gForm.FillRectangle(Brushes.White, this.ClientRectangle);
   for (int i = 1; i <= 7; ++i)
   {
     Rectangle r = new Rectangle(i * 40 - 15, 0, 15,
                   this.ClientRectangle.Height);
     gForm.FillRectangle(Brushes.Orange, r);
   }
   Bitmap bmp = new Bitmap(260, 260,System.Drawing.Imaging.PixelFormat.Format32bppArgb);
   Graphics gBmp = Graphics.FromImage(bmp);
   gBmp.rupositingMode = System.Drawing.Drawing2D.rupositingMode.SourceCopy;
   gForm.DrawImage(bmp, 20, 20, bmp.Width, bmp.Height);
   bmp.Dispose();
   gBmp.Dispose();
   }
   public static void Main() {
       Application.Run(new Form1());
   }

}

</source>

Create a green color with an alpha component then draw a green rectangle to the bitmap in memory

<source lang="csharp"> using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; public class Form1 : Form {

   protected override void OnPaint(PaintEventArgs e) {
       Graphics gForm = e.Graphics;
       gForm.FillRectangle(Brushes.White, this.ClientRectangle);
       for (int i = 1; i <= 7; ++i) {
           Rectangle r = new Rectangle(i * 40 - 15, 0, 15,
                                       this.ClientRectangle.Height);
           gForm.FillRectangle(Brushes.Orange, r);
       }
       Bitmap bmp = new Bitmap(260, 260, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
       Graphics gBmp = Graphics.FromImage(bmp);
       Color green = Color.FromArgb(0x40, 0, 0xff, 0);
       Brush greenBrush = new SolidBrush(green);
       gBmp.FillRectangle(greenBrush, 10, 10, 140, 140);
       gForm.DrawImage(bmp, 20, 20, bmp.Width, bmp.Height);
       bmp.Dispose();
       gBmp.Dispose();
       greenBrush.Dispose();
   }
   public static void Main() {
       Application.Run(new Form1());
   }

}

</source>

Create a red color with an alpha component then draw a red circle to the bitmap in memory

using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; public class Form1 : Form {

   protected override void OnPaint(PaintEventArgs e) {
   Graphics gForm = e.Graphics;
   gForm.FillRectangle(Brushes.White, this.ClientRectangle);
   for (int i = 1; i <= 7; ++i)
   {
     Rectangle r = new Rectangle(i * 40 - 15, 0, 15,this.ClientRectangle.Height);
     gForm.FillRectangle(Brushes.Orange, r);
   }
   Bitmap bmp = new Bitmap(260, 260,System.Drawing.Imaging.PixelFormat.Format32bppArgb);
   Graphics gBmp = Graphics.FromImage(bmp);

   Color red = Color.FromArgb(0x60, 0xff, 0, 0);
   Brush redBrush = new SolidBrush(red);
   gBmp.FillEllipse(redBrush, 70, 70, 160, 160);
   gForm.DrawImage(bmp, 20, 20, bmp.Width, bmp.Height);
   bmp.Dispose();
   gBmp.Dispose();
   redBrush.Dispose();
   }
   public static void Main() {
       Application.Run(new Form1());
   }

}

</source>

Create Graphics object From Image

<source lang="csharp"> using System; using System.Drawing; using System.Windows.Forms;

class HelloWorldBitmap: Form {

    const  float fResolution = 300;
    Bitmap bitmap = new Bitmap(1, 1);
  
    public static void Main()
    {
         Application.Run(new HelloWorldBitmap());
    }
    public HelloWorldBitmap()
    {
         ResizeRedraw = true; 
         
         bitmap.SetResolution(fResolution, fResolution);
  
         Graphics grfx = Graphics.FromImage(bitmap);
         Font     font = new Font("Times New Roman", 72);
         Size     size = grfx.MeasureString(Text, font).ToSize();
  
         bitmap = new Bitmap(bitmap, size);
         bitmap.SetResolution(fResolution, fResolution);
              
         grfx = Graphics.FromImage(bitmap);
         grfx.Clear(Color.White);
         grfx.DrawString(Text, font, Brushes.Black, 0, 0);
         grfx.Dispose();
    }
    protected override void OnPaint(PaintEventArgs pea)
    {
         grfx.DrawImage(bitmap, 0, 0);
    }

}

</source>

Create your own BitMap

 using System;
 using System.Drawing;
 using System.Drawing.Drawing2D;
 using System.Collections;
 using System.ruponentModel;
 using System.Windows.Forms;
 using System.Data;
 using System.Drawing.Imaging;
 public class Form1 : System.Windows.Forms.Form
 {
   public Form1()
   {
     InitializeComponent();
   }
   private void InitializeComponent()
   {
     this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
     this.ClientSize = new System.Drawing.Size(292, 273);
     this.Text = "";
     this.Resize += new System.EventHandler(this.Form1_Resize);
     this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form1_Paint);
   }
   static void Main() 
   {
     Application.Run(new Form1());
   }
   private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
   {      
     Bitmap bmp = new Bitmap(100, 100);
     Graphics gImage = Graphics.FromImage(bmp);
     gImage.FillRectangle(Brushes.Red, 0, 0, bmp.Width, bmp.Height);
     gImage.DrawRectangle(Pens.Black, 10, 10, bmp.Width - 20, bmp.Height - 20);
     Graphics gScreen = e.Graphics;
     gScreen.FillRectangle(Brushes.White, this.ClientRectangle);
     gScreen.DrawImage(bmp, new Rectangle(10, 10, bmp.Width, bmp.Height));
   }
   private void Form1_Resize(object sender, System.EventArgs e)
   {
     Invalidate();
   }
 }

      </source>

Double buffer with Bitmap

<source lang="csharp"> using System; using System.Drawing; using System.Windows.Forms; public class Form1 : Form {

   Pen p;
   SolidBrush b, bT = new SolidBrush(Color.Black);
   string path = "5.bmp";
   Image im;
   Font f;
   public Form1() {
       Color cP = Color.Gray;
       Color cB = Color.LightGray;
       p = new Pen(cP, 6);
       b = new SolidBrush(cB);
       im = Image.FromFile(path);
       f = new Font(new FontFamily("Times New Roman"), 10);
   }
   static void Main() {
       Application.Run(new Form1());
   }
   protected override void OnPaint(PaintEventArgs pea) {
       Sketch();
       //SketchDBuf();
   }
   private void Sketch() {
       Graphics g = Graphics.FromHwnd(this.Handle);
       g.FillRectangle(b, 4, 4, 260, 220);
       g.DrawRectangle(p, 4, 4, 260, 220);
       g.DrawImage(im, 33, 35, 200, 145);
       g.DrawString("AAAAAA", f, bT, 180, 190);
       g.Dispose();
   }
   private void SketchDBuf() {
       int hh = 3, w = 260, h = 220;
       Graphics g;
       Bitmap bm = new Bitmap(w + 2 * hh, h + 2 * hh);
       g = Graphics.FromImage(bm);
       g.FillRectangle(b, hh, hh, w, h);
       g.DrawRectangle(new Pen(Color.Gray, 2 * hh), hh, hh, w, h);
       g.DrawImage(im, hh + 30, hh + 32, 200, 145);
       g.DrawString("Text", f, bT, 180, 190);
       g = Graphics.FromHwnd(this.Handle);
       g.DrawImage(bm, 1, 1);
       g.Dispose();
   }

}

</source>

Draw an array of images

<source lang="csharp"> using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; public class MainForm : Form {

   private Bitmap[] myImages = new Bitmap[3];
   public MainForm() {
       myImages[0] = new Bitmap("imageA.bmp");
       myImages[1] = new Bitmap("imageB.bmp");
       myImages[2] = new Bitmap("imageC.bmp");
   }
   protected void OnPaint(PaintEventArgs e) {
       Graphics g = e.Graphics;
       int yOffset = 10;
       foreach (Bitmap b in myImages) {
           g.DrawImage(b, 10, yOffset, 90, 90);
           yOffset += 100;
       }
   }
   public static void Main() {
       Application.Run(new MainForm());
   }

}

</source>

Draw on an Bitmap

<source lang="csharp"> using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; public class Form1 : Form {

   protected override void OnPaint(PaintEventArgs e) {
   Bitmap bmp = new Bitmap(100, 100);
   Graphics gImage = Graphics.FromImage(bmp);
   gImage.FillRectangle(Brushes.Red, 0, 0, bmp.Width, bmp.Height);
   gImage.DrawRectangle(Pens.Black, 10, 10, bmp.Width - 20, bmp.Height - 20);
   Graphics gScreen = e.Graphics;
   gScreen.FillRectangle(Brushes.White, this.ClientRectangle);
   gScreen.DrawImage(bmp, new Rectangle(10, 10, bmp.Width, bmp.Height));
   }
   public static void Main() {
       Application.Run(new Form1());
   }

}

</source>

Draw shapes to the bitmap in memory

 using System;
 using System.Drawing;
 using System.Drawing.Drawing2D;
 using System.Collections;
 using System.ruponentModel;
 using System.Windows.Forms;
 using System.Data;
 using System.Drawing.Imaging;
 public class Form1 : System.Windows.Forms.Form
 {
   public Form1()
   {
     InitializeComponent();
   }
   private void InitializeComponent()
   {
     this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
     this.ClientSize = new System.Drawing.Size(292, 273);
     this.Text = "";
     this.Resize += new System.EventHandler(this.Form1_Resize);
     this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form1_Paint);
   }
   static void Main() 
   {
     Application.Run(new Form1());
   }
   private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
   {      
     Graphics gForm = e.Graphics;
     gForm.FillRectangle(Brushes.White, this.ClientRectangle);
     // Create a Bitmap image in memory and set its CompositingMode
     Bitmap bmp = new Bitmap(260, 260, PixelFormat.Format32bppArgb);
     Graphics gBmp = Graphics.FromImage(bmp);
     gBmp.rupositingMode = CompositingMode.SourceCopy;
     // draw a red circle to the bitmap in memory
     Color red = Color.FromArgb(0x60, 0xff, 0, 0);
     Brush redBrush = new SolidBrush(red);
     gBmp.FillEllipse(redBrush, 70, 70, 160, 160);
     // draw a green rectangle to the bitmap in memory
     Color green = Color.FromArgb(0x40, 0, 0xff, 0);
     Brush greenBrush = new SolidBrush(green);
     gBmp.FillRectangle(greenBrush, 10, 10, 140, 140);
     
     // draw the bitmap on our window
     gForm.DrawImage(bmp, 20, 20, bmp.Width, bmp.Height);
     bmp.Dispose();
     gBmp.Dispose();
     redBrush.Dispose();
     greenBrush.Dispose();
   }
   private void Form1_Resize(object sender, System.EventArgs e)
   {
     Invalidate();
   }
 }
          
      </source>

new Bitmap(bitmap, size)

using System; using System.Drawing; using System.Windows.Forms; class HelloWorldBitmap : Form {

   const float fResolution = 300;
   Bitmap bitmap = new Bitmap(1, 1);
   public static void Main() {
       Application.Run(new HelloWorldBitmap());
   }
   public HelloWorldBitmap() {
       Text = "Hello, World!";
       ResizeRedraw = true;
       bitmap.SetResolution(fResolution, fResolution);
       Graphics grfx = Graphics.FromImage(bitmap);
       Font font = new Font("Times New Roman", 72);
       Size size = grfx.MeasureString(Text, font).ToSize();
       bitmap = new Bitmap(bitmap, size);
       bitmap.SetResolution(fResolution, fResolution);
       grfx = Graphics.FromImage(bitmap);
       grfx.Clear(Color.White);
       grfx.DrawString(Text, font, Brushes.Black, 0, 0);
       grfx.Dispose();
   }
   protected override void OnPaint(PaintEventArgs pea) {
       pea.Graphics.DrawImage(bitmap, 0, 0);
   }

}

</source>

PixelFormat.DontCare

<source lang="csharp"> using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; public class Form1 : Form {

   protected override void OnPaint(PaintEventArgs e) {
   Graphics g = e.Graphics;
   Bitmap bmp = new Bitmap("rama.jpg");
   g.FillRectangle(Brushes.White, this.ClientRectangle);
   Rectangle r = new Rectangle(120, 120, 400, 400);
   Bitmap bmp2 = bmp.Clone(r, System.Drawing.Imaging.PixelFormat.DontCare);
   g.DrawImage(bmp, new Rectangle(0, 0, 200, 200));
   g.DrawImage(bmp2, new Rectangle(210, 0, 200, 200));
   bmp2.Dispose();
   }
   public static void Main() {
       Application.Run(new Form1());
   }

}

</source>

Read Bitmap Size by using BinaryReader

using System; using System.IO;

class Class1 {

   static void Main(string[] args) {
       string[] cma = Environment.GetCommandLineArgs();
       if (cma.GetUpperBound(0) >= 1) {
           FileStream myFStream = new FileStream(cma[1], FileMode.Open, FileAccess.Read);
           BinaryReader binRead = new BinaryReader(myFStream);
           binRead.BaseStream.Position = 0x12;
           
           Console.WriteLine(binRead.ReadInt32());
           Console.WriteLine(binRead.ReadInt32());
           Console.WriteLine(binRead.ReadInt16());
           Console.WriteLine(binRead.ReadInt16());
           binRead.Close();
           myFStream.Close();
       }
   }

}

</source>

Resize the Bitmap using the highest quality interpolation mode

<source lang="csharp"> using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Drawing.Drawing2D; using System.Text; using System.Windows.Forms; public class Form1 : Form {

   protected override void OnPaint(PaintEventArgs e) {
   Graphics g = e.Graphics;
   Bitmap bmp = new Bitmap("rama.jpg");
   g.FillRectangle(Brushes.White, this.ClientRectangle);
   int width = bmp.Width;
   int height = bmp.Height;
   g.InterpolationMode = InterpolationMode.HighQualityBicubic;
   g.DrawImage(
     bmp,
     new Rectangle(130, 10, 120, 120),   // source rectangle
     new Rectangle(0, 0, width, height), // destination rectangle
     GraphicsUnit.Pixel);
   }
   public static void Main() {
       Application.Run(new Form1());
   }

}

</source>

Resize the Bitmap using the lowest quality interpolation mode

<source lang="csharp"> using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Drawing.Drawing2D; using System.Text; using System.Windows.Forms; public class Form1 : Form {

   protected override void OnPaint(PaintEventArgs e) {
   Graphics g = e.Graphics;
   Bitmap bmp = new Bitmap("rama.jpg");
   g.FillRectangle(Brushes.White, this.ClientRectangle);
   int width = bmp.Width;
   int height = bmp.Height;
   g.InterpolationMode = InterpolationMode.NearestNeighbor;
   g.DrawImage(
     bmp,
     new Rectangle(10, 10, 120, 120),    // source rectangle
     new Rectangle(0, 0, width, height), // destination rectangle
     GraphicsUnit.Pixel);
   }
   public static void Main() {
       Application.Run(new Form1());
   }

}

</source>

Use a color matrix to change the color properties of the image

<source lang="csharp"> using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Drawing.Imaging; using System.Drawing.Text; using System.Drawing.Printing; using System.Drawing.Drawing2D; using System.Text; using System.Windows.Forms; public class Form1 : Form {

   protected override void OnPaint(PaintEventArgs e) {
       Bitmap bmp = new Bitmap("alphabet.gif");
       Graphics g = e.Graphics;
       float[][] matrixItems = {
                   new float[] {0.2f, 0, 0, 0, 0},
                   new float[] {0, 0.8f, 0, 0, 0},
                   new float[] {0, 0, 1, 0, 0},
                   new float[] {0, 0, 0, 1, 0}, 
                   new float[] {0, 0, 0, 0, 1}};
       ColorMatrix colorMatrix = new ColorMatrix(matrixItems);
       ImageAttributes imageAtt = new ImageAttributes();
       imageAtt.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
       TextureBrush tb = new TextureBrush(bmp, new Rectangle(0, 0, bmp.Width, bmp.Height), imageAtt);
       tb.WrapMode = WrapMode.Tile;
       g.FillRectangle(tb, this.ClientRectangle);
       bmp.Dispose();
       tb.Dispose();
   }
   public static void Main() {
       Application.Run(new Form1());
   }

}

</source>

write the pixel information to the console window

<source lang="csharp"> using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; public class Form1 : Form {

   protected override void OnPaint(PaintEventArgs e) {
   Graphics gForm = e.Graphics;
   gForm.FillRectangle(Brushes.White, this.ClientRectangle);
   Bitmap bmp = new Bitmap(6, 6);
   Graphics gBmp = Graphics.FromImage(bmp);
   gBmp.FillRectangle(Brushes.White, 0, 0, bmp.Width, bmp.Height);
   gBmp.DrawLine(Pens.Red, 0, 0, 5, 5);
   gForm.DrawImage(bmp, 20, 20, bmp.Width, bmp.Height);
   
   for (int y = 0; y < bmp.Height; ++y)
   {
     for (int x = 0; x < bmp.Width; ++x)
     {
       Color c = bmp.GetPixel(x, y);
       Console.Write("{0,2:x}{1,2:x}{2,2:x}{3,2:x}  ",c.A, c.R, c.G, c.G);
     }
     Console.WriteLine();
   }
   bmp.Dispose();
   }
   public static void Main() {
       Application.Run(new Form1());
   }

}

</source>

Csharp/C Sharp/2D Graphics/Bitmap

Содержание

Bitmap.HorizontalResolution

Bitmap property: Height, Physical Dimension, width, raw format and size

Bitmap.SetResolution

Bit operation with PixelFormat.Alpha

Create a Bitmap image in memory and set its CompositingMode

Create a green color with an alpha component then draw a green rectangle to the bitmap in memory

Create a red color with an alpha component then draw a red circle to the bitmap in memory

Create Graphics object From Image

Create your own BitMap

Double buffer with Bitmap

Draw an array of images

Draw on an Bitmap

Draw shapes to the bitmap in memory

new Bitmap(bitmap, size)

PixelFormat.DontCare

Read Bitmap Size by using BinaryReader

Resize the Bitmap using the highest quality interpolation mode

Resize the Bitmap using the lowest quality interpolation mode

Use a color matrix to change the color properties of the image

write the pixel information to the console window

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