//// This code is part of Document Solutions for Imaging demos.// Copyright (c) MESCIUS inc. All rights reserved.//using System.IO;using System.Drawing;using GrapeCity.Documents.Imaging;using GrapeCity.Documents.Text;using GCTEXT = GrapeCity.Documents.Text;
namespace DsImagingWeb.Demos{    // This sample demonstrates how to use TrueType font hinting instructions.    //    // Many TrueType fonts include low-level hinting instructions.    // The original purpose of introducing hinting instructions was     // to improve the look of glyphs when the font size is comparable    // to the device resolution.    // Such instructions are also used (especially in CJK fonts)    // to reuse some glyph parts in different glyphs regardless of the font size.    // GcGraphics supports hinting instructions. To enable it, set    // TextFormat.EnableFontHinting property to true when rendering text.    //     // This sample renders a string using small sans-serif and serif fonts    // with hinting turned OFF and ON.    public class TrueTypeHinting    {        public GcBitmap GenerateImage(Size pixelSize, float dpi, bool opaque, string[] sampleParams = null)        {            var bmp = new GcBitmap(pixelSize.Width, pixelSize.Height, true, dpi, dpi);            var dy = dpi / 2;            var ip = new PointF(dpi, dpi);            using (var g = bmp.CreateGraphics(Color.White))            {                // Turning anti-aliasing off makes the hinting effect on small text more obvious:                g.Renderer.Aliased = true;
                var sOff = "Hinting OFF: ";                var sOn = "Hinting ON: ";
                // Draw a string with hinting instructions off and on:                var text = "The quick brown fox jumps over the lazy dog.";
                var tf = new TextFormat()                {                    Font = GCTEXT.Font.FromFile(Path.Combine("Resources", "Fonts", "FreeSans.ttf")),                    FontSize = 12,                    EnableFontHinting = false                };                g.DrawString(sOff + text, tf, ip);                ip.Y += dy;                tf.FontSize = 10;                g.DrawString(sOff + text, tf, ip);                ip.Y += dy * 2;
                tf.EnableFontHinting = true;                tf.FontSize = 12;                g.DrawString(sOn + text, tf, ip);                ip.Y += dy;                tf.FontSize = 10;                g.DrawString(sOn + text, tf, ip);                ip.Y += dy * 2;
                // Draw the same string with a serif font:                tf.Font = GCTEXT.Font.FromFile(Path.Combine("Resources", "Fonts", "FreeSerif.ttf"));                tf.EnableFontHinting = false;                tf.FontSize = 12;                g.DrawString(sOff + text, tf, ip);                ip.Y += dy;                tf.FontSize = 10;                g.DrawString(sOff + text, tf, ip);                ip.Y += dy * 2;
                tf.EnableFontHinting = true;                tf.FontSize = 12;                g.DrawString(sOn + text, tf, ip);                ip.Y += dy;                tf.FontSize = 10;                g.DrawString(sOn + text, tf, ip);                ip.Y += dy * 2;            }            // Done:            return bmp;        }    }}