How to Create and Draw on Bitmaps with Aspose.Drawing in .NET

create_draw_on_bitmaps_bitmap_creation_drawing.cs

// How to Create and Draw on Bitmaps with Aspose.Drawing in .NET
// Read the full guide here: https://blog.aspose.com/drawing/how-to-create-and-draw-on-bitmaps-with-asposedrawing-in-dotnet/

using System;
using Aspose.Drawing;
using Aspose.Drawing.Imaging;
using Aspose.Drawing.Imaging.ImageOptions;
using Aspose.Drawing.Drawing2D;

namespace BitmapDemo
{
    class Program
    {
        static void Main()
        {
            // 1. Create a new bitmap with 800x600 size and 32‑bit ARGB pixel format
            using (Bitmap bitmap = new Bitmap(800, 600, PixelFormat.Format32bppArgb))
            {
                // 2. Get a graphics surface for drawing
                using (Graphics graphics = bitmap.GetGraphics())
                {
                    // Clear background with white color
                    graphics.Clear(Color.White);

                    // 3. Draw a blue rectangle
                    using (Pen bluePen = new Pen(Color.Blue, 5))
                    {
                        graphics.DrawRectangle(bluePen, new Rectangle(100, 100, 600, 400));
                    }

                    // 4. Draw a filled red ellipse
                    using (Brush redBrush = new SolidBrush(Color.Red))
                    {
                        graphics.FillEllipse(redBrush, new Rectangle(200, 150, 400, 300));
                    }

                    // 5. Draw centered text
                    using (Font font = new Font("Arial", 36, FontStyle.Bold))
                    using (Brush blackBrush = new SolidBrush(Color.Black))
                    {
                        string text = "Aspose.Drawing Demo";
                        SizeF textSize = graphics.MeasureString(text, font);
                        PointF location = new PointF(
                            (bitmap.Width - textSize.Width) / 2,
                            (bitmap.Height - textSize.Height) / 2);
                        graphics.DrawString(text, font, blackBrush, location);
                    }
                }

                // 6. Save the bitmap as PNG
                bitmap.Save("DemoOutput.png", ImageFormat.Png);
            }

            Console.WriteLine("Bitmap created and saved as DemoOutput.png");
        }
    }
}