Opentk/Source/Utilities/Graphics/TextPrinter.cs

#region --- License ---
/* Licensed under the MIT/X11 license.
 * Copyright (c) 2006-2008 the OpenTK Team.
 * This notice may not be removed from any source distribution.
 * See license.txt for licensing details.
 */
#endregion

using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Text.RegularExpressions;
using System.Runtime.InteropServices;
using System.Diagnostics;

using OpenTK.Math;
using OpenTK.Graphics;
using OpenTK.Graphics.Text;
using OpenTK.Platform;

namespace OpenTK.Fonts { }

namespace OpenTK.Graphics
{
    /// <summary>
    /// Provides methods to perform layout and print hardware accelerated text.
    /// </summary>
    public sealed class TextPrinter : ITextPrinter
    {
        #region Fields

        GlyphCache glyph_cache;
        IGlyphRasterizer glyph_rasterizer;
        ITextOutputProvider text_output;

        #endregion

        #region Constructors

        /// <summary>
        /// Constructs a new TextPrinter object.
        /// </summary>
        public TextPrinter()
            : this(null, null)
        {
        }

        TextPrinter(IGlyphRasterizer rasterizer, ITextOutputProvider output/*, IGlyphCacheProvider, ITextOutputProvider */)
        {
            if (rasterizer == null)
                rasterizer = new GdiPlusGlyphRasterizer();

            if (output == null)
                output = new GL1TextOutputProvider();

            glyph_rasterizer = rasterizer;
            glyph_cache = new GlyphCache(rasterizer);
            text_output = output;
        }

        #endregion

        #region ITextPrinter Members

        #region public void Begin()

        /// <summary>
        /// Sets up OpenGL state for drawing text.
        /// </summary>
        [Obsolete]
        public void Begin()
        {
            text_output.Begin();
        }

        #endregion

        #region public void End()

        /// <summary>
        /// Restores OpenGL state.
        /// </summary>
        [Obsolete]
        public void End()
        {
            text_output.End();
        }

        #endregion

        #region Print

        public void Print(string text, Font font, Color color)
        {
            Print(text, font, color, RectangleF.Empty, TextPrinterOptions.Default);
        }

        public void Print(string text, Font font, Color color, RectangleF layoutRectangle)
        {
            Print(text, font, color, layoutRectangle, TextPrinterOptions.Default);
        }

        public void Print(string text, Font font, Color color, RectangleF layoutRectangle, TextPrinterOptions options)
        {
            if (String.IsNullOrEmpty(text))
                return;

            if (font == null)
                throw new ArgumentNullException("font");

            text_output.Begin();
            text_output.Print(new TextBlock(text, font, options, layoutRectangle.Size), layoutRectangle.Location, color, glyph_rasterizer, glyph_cache);
            text_output.End();
        }

        #endregion

        #region Measure

        public TextExtents Measure(string text, Font font)
        {
            return Measure(text, font, RectangleF.Empty, TextPrinterOptions.Default);
        }

        public TextExtents Measure(string text, Font font, RectangleF layoutRectangle)
        {
            return Measure(text, font, layoutRectangle, TextPrinterOptions.Default);
        }

        public TextExtents Measure(string text, Font font, RectangleF layoutRectangle, TextPrinterOptions options)
        {
            return glyph_rasterizer.MeasureText(new TextBlock(text, font, options, layoutRectangle.Size), layoutRectangle.Location);
        }

        #endregion

        #region Obsolete

        [Obsolete("Use TextPrinter.Print instead")]
        public void Draw(TextHandle handle)
        {
            Print(handle.Text, handle.GdiPFont, Color.White);
        }

        [Obsolete("Use TextPrinter.Print instead")]
        public void Draw(string text, TextureFont font)
        {
            Print(text, font.font, Color.White);
        }

        [Obsolete("Use TextPrinter.Print instead")]
        public void Prepare(string text, TextureFont font, out TextHandle handle)
        {
            handle = new TextHandle(text, font.font);
        }

        #endregion

        #endregion
    }
}