//
// 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 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 shows the different (anti)aliasing modes of rendering text:
    // - No anti-aliasing, very fast but poor quality (not recommended).
    // - Fast anti-aliasing. This is the default that provides good quality and fast rendering.
    // - Slow anti-aliasing. Highest quality but slower than the default.
    public class Antialiasing
    {
        public GcBitmap GenerateImage(Size pixelSize, float dpi, bool opaque, string[] sampleParams = null)
        {
            var bmp = new GcBitmap(pixelSize.Width, pixelSize.Height, true, dpi, dpi);
            using var g = bmp.CreateGraphics(Color.FromArgb(unchecked((int)0xffccf2ff)));
            g.Renderer.Multithreaded = true;

            var text = Common.Util.LoremIpsum();
            var tsize = new SizeF(bmp.Width / 2, bmp.Height / 2);
            var pad = 96f / 4;

            var tfcap = new TextFormat()
            {
                Font = GCTEXT.Font.FromFile(Path.Combine("Resources", "Fonts", "NotoSerif-Bold.ttf")),
                FontSize = 16,
            };

            var tl = g.CreateTextLayout();
            tl.DefaultFormat.Font = GCTEXT.Font.FromFile(Path.Combine("Resources", "Fonts", "NotoSerif-Regular.ttf"));
            tl.DefaultFormat.FontSize = 14;
            tl.TextAlignment = TextAlignment.Justified;
            tl.FirstLineIndent = 96 / 2;
            tl.ParagraphSpacing = 96 / 8;
            tl.MaxWidth = tsize.Width;
            tl.MaxHeight = tsize.Height;
            tl.MarginAll = pad;

            var tloc = PointF.Empty;
            using (g.PushClip(new RectangleF(tloc, tsize)))
            {
                bmp.Renderer.Aliased = true;
                tl.AppendLine("No anti-aliasing (worst quality)", tfcap);
                tl.Append(text);
                tl.PerformLayout(true);
                g.DrawTextLayout(tl, tloc);
            }
            tloc.X += tsize.Width;
            using (g.PushClip(new RectangleF(tloc, tsize)))
            {
                bmp.Renderer.Aliased = false;
                bmp.Renderer.SlowAntialiasing = false;
                tl.Clear();
                tl.AppendLine("Fast anti-aliasing (default quality)", tfcap);
                tl.Append(text);
                tl.PerformLayout(true);
                g.DrawTextLayout(tl, tloc);
            }
            tloc.X = 0;
            tloc.Y += tsize.Height;
            using (g.PushClip(new RectangleF(tloc, tsize)))
            {
                bmp.Renderer.Aliased = false;
                bmp.Renderer.SlowAntialiasing = true;
                tl.Clear();
                tl.AppendLine("Slow anti-aliasing (highest quality)", tfcap);
                tl.Append(text);
                tl.PerformLayout(true);
                g.DrawTextLayout(tl, tloc);
            }
            return bmp;
        }
    }
}