Create a red color with an alpha component then draw a red circle to the bitmap in memory : Bitmap « 2D Graphics « C# / C Sharp

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C# / C Sharp » 2D Graphics » BitmapScreenshots 
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.ComponentModel;
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 15015,this.ClientRectangle.Height);
      gForm.FillRectangle(Brushes.Orange, r);
    }

    Bitmap bmp = new Bitmap(260260,System.Drawing.Imaging.PixelFormat.Format32bppArgb);
    Graphics gBmp = Graphics.FromImage(bmp);


    Color red = Color.FromArgb(0x600xff00);
    Brush redBrush = new SolidBrush(red);
    gBmp.FillEllipse(redBrush, 7070160160);

    gForm.DrawImage(bmp, 2020, bmp.Width, bmp.Height);

    bmp.Dispose();
    gBmp.Dispose();
    redBrush.Dispose();

    }
    public static void Main() {
        Application.Run(new Form1());
    }
}

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