Dithering2.cs
- //
- // This code is part of Document Solutions for Imaging demos.
- // Copyright (c) MESCIUS inc. All rights reserved.
- //
- using System;
- using System.IO;
- using System.Drawing;
- using System.Collections.Generic;
- using System.Linq;
- using System.Numerics;
- using GrapeCity.Documents.Drawing;
- using GrapeCity.Documents.Text;
- using GrapeCity.Documents.Imaging;
- using GCTEXT = GrapeCity.Documents.Text;
- using GCDRAW = GrapeCity.Documents.Drawing;
-
- namespace DsImagingWeb.Demos
- {
- // This sample demonstrates how to use dithering methods Stucki, Atkinson, Burkes.
- // See also MatrixEffects1 and MatrixEffects2.
- public class Dithering2
- {
- public GcBitmap GenerateImage(Size pixelSize, float dpi, bool opaque, string[] sampleParams = null)
- {
- opaque = false;
- var bmp = new GcBitmap(pixelSize.Width, pixelSize.Height, opaque, dpi, dpi);
- using (var origBmp = new GcBitmap())
- {
- // Load a sample photo:
- var imagePath = Path.Combine("Resources", "Stock", "bw-hiking.jpg");
- using (var stm = new FileStream(imagePath, FileMode.Open, FileAccess.Read, FileShare.Read, 4096, FileOptions.RandomAccess))
- origBmp.Load(stm);
-
- origBmp.SetAlphaTo255();
- origBmp.Opaque = false;
-
- // Resize the original photo so we can place 4 samples of it
- // on the resulting bitmap:
- int w = pixelSize.Width / 2;
- int h = pixelSize.Height / 2;
- using (var sizedBmp = origBmp.Resize(w, h, InterpolationMode.Cubic))
- {
- // Copy the resized original into 4 quadrants of the resulting bitmap:
- bmp.BitBlt(sizedBmp, 0, 0);
- bmp.BitBlt(sizedBmp, w, 0);
- bmp.BitBlt(sizedBmp, 0, h);
- bmp.BitBlt(sizedBmp, w, h);
- }
-
- // Keep the pixels in top left quadrant intact,
- // apply effects to the other 3 quadrants:
- var lineh = 2;
- bmp.ApplyEffect(DitheringEffect.Get(DitheringMethod.Stucki), new Rectangle(w + lineh, 0, w - lineh, h - lineh));
- bmp.ApplyEffect(DitheringEffect.Get(DitheringMethod.Atkinson), new Rectangle(0, h + lineh, w - lineh, h - lineh));
- bmp.ApplyEffect(DitheringEffect.Get(DitheringMethod.Burkes), new Rectangle(w + lineh, h + lineh, w - lineh, h - lineh));
-
- // Add borders between the quadrants, and captions for each:
- using (var g = bmp.CreateGraphics(null))
- {
- var foreColor = Color.Yellow;
- var backColor = Color.Blue;
- var font = GCTEXT.Font.FromFile(Path.Combine("Resources", "Fonts", "cour.ttf"));
- g.DrawLine(w, 0, w, h * 2, new GCDRAW.Pen(foreColor, lineh * 2));
- g.DrawLine(0, h, w * 2, h, new GCDRAW.Pen(foreColor, lineh * 2));
- var tf = new TextFormat() { Font = font, FontSize = 18, ForeColor = foreColor, BackColor = backColor, FontBold = true };
- var th = g.MeasureString("QWERTY", tf).Height;
- g.DrawString(" Original image ", tf, new PointF(0, h - th - lineh));
- g.DrawString(" Stucki ", tf, new PointF(w + lineh, h - th - lineh));
- g.DrawString(" Atkinson ", tf, new PointF(0, h * 2 - th));
- g.DrawString(" Burkes ", tf, new PointF(w + lineh, h * 2 - th));
- }
- }
- return bmp;
- }
- }
- }
-