399 lines
14 KiB
C#
399 lines
14 KiB
C#
/******************************************************************************
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* SunnyUI 开源控件库、工具类库、扩展类库、多页面开发框架。
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* CopyRight (C) 2012-2022 ShenYongHua(沈永华).
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* QQ群：56829229 QQ：17612584 EMail：SunnyUI@QQ.Com
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*
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* Blog: https://www.cnblogs.com/yhuse
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* Gitee: https://gitee.com/yhuse/SunnyUI
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* GitHub: https://github.com/yhuse/SunnyUI
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*
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* SunnyUI.dll can be used for free under the GPL-3.0 license.
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* If you use this code, please keep this note.
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* 如果您使用此代码，请保留此说明。
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******************************************************************************
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* 文件名称: UFontImage.cs
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* 文件说明: 字体图片帮助类
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* 当前版本: V3.1
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* 创建日期: 2020-01-01
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*
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* 2020-01-01: V2.2.0 增加文件说明
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* 2020-05-21: V2.2.5 调整从资源文件中加载字体，不用另存为文件。
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* 感谢：麦壳饼 https://gitee.com/maikebing
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* 2021-06-15: V3.0.4 增加FontAwesomeV5的字体图标，重构代码
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******************************************************************************/
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using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Drawing.Imaging;
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using System.Drawing.Text;
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using System.IO;
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using System.Runtime.InteropServices;
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namespace Sunny.UI
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{
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/// <summary>
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/// 字体图片帮助类
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/// </summary>
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public static class FontImageHelper
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{
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/// <summary>
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/// AwesomeFont
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/// </summary>
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public static readonly FontImages FontAwesomeV4;
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/// <summary>
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/// ElegantFont
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/// </summary>
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public static readonly FontImages ElegantIcons;
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/// <summary>
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/// FontAwesomeV5Brands
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/// </summary>
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public static readonly FontImages FontAwesomeV5Brands;
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/// <summary>
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/// FontAwesomeV5Regular
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/// </summary>
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public static readonly FontImages FontAwesomeV5Regular;
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/// <summary>
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/// FontAwesomeV5Solid
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/// </summary>
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public static readonly FontImages FontAwesomeV5Solid;
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public const int FontAwesomeV4Count = 786;
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public const int ElegantIconsCount = 360;
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public const int FontAwesomeV5RegularCount = 151;
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public const int FontAwesomeV5SolidCount = 1001;
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public const int FontAwesomeV5BrandsCount = 457;
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/// <summary>
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/// 构造函数
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/// </summary>
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static FontImageHelper()
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{
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FontAwesomeV4 = new FontImages(ReadFontFileFromResource("Sunny.UI.Font.FontAwesome.ttf"));
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ElegantIcons = new FontImages(ReadFontFileFromResource("Sunny.UI.Font.ElegantIcons.ttf"));
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FontAwesomeV5Brands = new FontImages(ReadFontFileFromResource("Sunny.UI.Font.fa-brands-400.ttf"));
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FontAwesomeV5Regular = new FontImages(ReadFontFileFromResource("Sunny.UI.Font.fa-regular-400.ttf"));
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FontAwesomeV5Solid = new FontImages(ReadFontFileFromResource("Sunny.UI.Font.fa-solid-900.ttf"));
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}
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private static byte[] ReadFontFileFromResource(string name)
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{
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byte[] buffer = null;
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Stream fontStream = System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream(name);
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if (fontStream != null)
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{
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buffer = new byte[fontStream.Length];
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fontStream.Read(buffer, 0, (int)fontStream.Length);
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fontStream.Close();
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}
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return buffer;
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}
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/// <summary>
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/// 获取字体大小
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/// </summary>
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/// <param name="graphics">GDI绘图</param>
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/// <param name="symbol">字符</param>
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/// <param name="symbolSize">大小</param>
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/// <returns>字体大小</returns>
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public static SizeF GetFontImageSize(this Graphics graphics, int symbol, int symbolSize)
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{
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Font font = GetFont(symbol, symbolSize);
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if (font == null)
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{
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return new SizeF(0, 0);
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}
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return graphics.MeasureString(char.ConvertFromUtf32(symbol), font);
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}
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private static UISymbolType GetSymbolType(int symbol)
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{
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return (UISymbolType)symbol.Div(100000);
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}
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private static int GetSymbolValue(int symbol)
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{
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return symbol.Mod(100000);
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}
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/// <summary>
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/// 绘制字体图片
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/// </summary>
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/// <param name="graphics">GDI绘图</param>
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/// <param name="symbol">字符</param>
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/// <param name="symbolSize">大小</param>
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/// <param name="color">颜色</param>
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/// <param name="rect">区域</param>
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/// <param name="xOffset">左右偏移</param>
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/// <param name="yOffSet">上下偏移</param>
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public static void DrawFontImage(this Graphics graphics, int symbol, int symbolSize, Color color,
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RectangleF rect, int xOffset = 0, int yOffSet = 0)
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{
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SizeF sf = graphics.GetFontImageSize(symbol, symbolSize);
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graphics.DrawFontImage(symbol, symbolSize, color, rect.Left + ((rect.Width - sf.Width) / 2.0f).RoundEx(),
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rect.Top + ((rect.Height - sf.Height) / 2.0f).RoundEx(), xOffset, yOffSet);
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}
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/// <summary>
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/// 绘制字体图片
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/// </summary>
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/// <param name="graphics">GDI绘图</param>
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/// <param name="symbol">字符</param>
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/// <param name="symbolSize">大小</param>
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/// <param name="color">颜色</param>
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/// <param name="left">左</param>
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/// <param name="top">上</param>
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/// <param name="xOffset">左右偏移</param>
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/// <param name="yOffSet">上下偏移</param>
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public static void DrawFontImage(this Graphics graphics, int symbol, int symbolSize, Color color,
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float left, float top, int xOffset = 0, int yOffSet = 0)
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{
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//字体
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Font font = GetFont(symbol, symbolSize);
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if (font == null)
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{
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return;
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}
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var symbolValue = GetSymbolValue(symbol);
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string text = char.ConvertFromUtf32(symbolValue);
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graphics.TextRenderingHint = TextRenderingHint.AntiAlias;
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graphics.InterpolationMode = InterpolationMode.HighQualityBilinear;
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graphics.DrawString(text, font, color, left + xOffset, top + yOffSet);
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graphics.TextRenderingHint = TextRenderingHint.SystemDefault;
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graphics.InterpolationMode = InterpolationMode.Default;
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}
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/// <summary>
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/// 创建图片
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/// </summary>
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/// <param name="symbol">字符</param>
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/// <param name="size">大小</param>
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/// <param name="color">颜色</param>
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/// <returns>图片</returns>
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public static Image CreateImage(int symbol, int size, Color color)
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{
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Bitmap image = new Bitmap(size, size);
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using (Graphics g = image.Graphics())
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{
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SizeF sf = g.GetFontImageSize(symbol, size);
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g.DrawFontImage(symbol, size, color, (image.Width - sf.Width) / 2.0f, (image.Height - sf.Height) / 2.0f);
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}
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return image;
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}
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/// <summary>
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/// 获取字体
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/// </summary>
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/// <param name="symbol">字符</param>
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/// <param name="imageSize">大小</param>
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/// <returns>字体</returns>
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public static Font GetFont(int symbol, int imageSize)
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{
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var symbolType = GetSymbolType(symbol);
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var symbolValue = GetSymbolValue(symbol);
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switch (symbolType)
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{
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case UISymbolType.FontAwesomeV4:
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if (symbol > 0xF000)
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return FontAwesomeV4.GetFont(symbolValue, imageSize);
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else
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return ElegantIcons.GetFont(symbolValue, imageSize);
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case UISymbolType.FontAwesomeV5Brands:
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return FontAwesomeV5Brands.GetFont(symbolValue, imageSize);
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case UISymbolType.FontAwesomeV5Regular:
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return FontAwesomeV5Regular.GetFont(symbolValue, imageSize);
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case UISymbolType.FontAwesomeV5Solid:
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return FontAwesomeV5Solid.GetFont(symbolValue, imageSize);
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default:
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if (symbol > 0xF000)
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return FontAwesomeV4.GetFont(symbolValue, imageSize);
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else
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return ElegantIcons.GetFont(symbolValue, imageSize);
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}
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}
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}
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/// <summary>
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/// 字体图标图片
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/// </summary>
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public class FontImages
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{
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private readonly PrivateFontCollection ImageFont;
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private readonly Dictionary<int, Font> Fonts = new Dictionary<int, Font>();
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private const int MinFontSize = 8;
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private const int MaxFontSize = 88;
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private readonly IntPtr memoryFont = IntPtr.Zero;
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public FontImages(byte[] buffer)
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{
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ImageFont = new PrivateFontCollection();
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memoryFont = Marshal.AllocCoTaskMem(buffer.Length);
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Marshal.Copy(buffer, 0, memoryFont, buffer.Length);
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ImageFont.AddMemoryFont(memoryFont, buffer.Length);
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Loaded = true;
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LoadDictionary();
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}
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/// <summary>
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/// 构造函数
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/// </summary>
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/// <param name="filename">字体文件名</param>
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public FontImages(string filename)
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{
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if (File.Exists(filename))
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{
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ImageFont = new PrivateFontCollection();
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ImageFont.AddFontFile(filename);
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Loaded = true;
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LoadDictionary();
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}
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}
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/// <summary>
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/// 字体加载完成标志
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/// </summary>
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public bool Loaded
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{
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get;
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}
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private void LoadDictionary()
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{
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int size = MinFontSize;
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for (int i = 0; i <= MaxFontSize - MinFontSize; i++)
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{
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Fonts.Add(size, GetFont(size));
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size += 1;
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}
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}
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/// <summary>
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/// 析构函数
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/// </summary>
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~FontImages()
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{
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foreach (var font in Fonts.Values)
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{
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font.Dispose();
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}
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if (memoryFont != IntPtr.Zero)
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{
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Marshal.FreeCoTaskMem(memoryFont);
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}
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Fonts.Clear();
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}
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/// <summary>
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/// 获取字体
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/// </summary>
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/// <param name="iconText">图标</param>
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/// <param name="imageSize">图标大小</param>
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/// <returns>字体</returns>
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public Font GetFont(int iconText, int imageSize)
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{
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int item = GetFontSize(iconText, imageSize);
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if (Fonts.ContainsKey(item))
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{
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return Fonts[GetFontSize(iconText, imageSize)];
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}
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return null;
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}
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/// <summary>
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/// 获取字体大小
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/// </summary>
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/// <param name="symbol">图标</param>
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/// <param name="imageSize">图标大小</param>
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/// <returns>字体大小</returns>
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public int GetFontSize(int symbol, int imageSize)
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{
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using (Bitmap bitmap = new Bitmap(48, 48))
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using (Graphics graphics = Graphics.FromImage(bitmap))
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{
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return BinarySearch(graphics, MinFontSize, MaxFontSize, symbol, imageSize);
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}
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}
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public int BinarySearch(Graphics graphics, int low, int high, int symbol, int imageSize)
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{
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int mid = (low + high) / 2;
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Font font = Fonts[mid];
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SizeF sf = GetIconSize(symbol, graphics, font);
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if (low >= high)
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{
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return mid;
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}
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if (sf.Width < imageSize && sf.Height < imageSize)
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{
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return BinarySearch(graphics, mid + 1, high, symbol, imageSize);
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}
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return BinarySearch(graphics, low, mid - 1, symbol, imageSize);
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}
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private Size GetIconSize(int iconText, Graphics graphics, Font font)
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{
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string text = char.ConvertFromUtf32(iconText);
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return graphics.MeasureString(text, font).ToSize();
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}
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public Icon ToIcon(Bitmap srcBitmap, int size)
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{
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if (srcBitmap == null)
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{
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throw new ArgumentNullException(nameof(srcBitmap));
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}
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Icon icon;
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using (MemoryStream memoryStream = new MemoryStream())
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{
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new Bitmap(srcBitmap, new Size(size, size)).Save(memoryStream, ImageFormat.Png);
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Stream stream = new MemoryStream();
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BinaryWriter binaryWriter = new BinaryWriter(stream);
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if (stream.Length <= 0L)
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{
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return null;
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}
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binaryWriter.Write((byte)0);
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binaryWriter.Write((byte)0);
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binaryWriter.Write((short)1);
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binaryWriter.Write((short)1);
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binaryWriter.Write((byte)size);
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binaryWriter.Write((byte)size);
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binaryWriter.Write((byte)0);
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binaryWriter.Write((byte)0);
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binaryWriter.Write((short)0);
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binaryWriter.Write((short)32);
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binaryWriter.Write((int)memoryStream.Length);
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binaryWriter.Write(22);
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binaryWriter.Write(memoryStream.ToArray());
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binaryWriter.Flush();
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binaryWriter.Seek(0, SeekOrigin.Begin);
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icon = new Icon(stream);
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stream.Dispose();
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}
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return icon;
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}
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private Font GetFont(float size)
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{
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return Loaded ? new Font(ImageFont.Families[0], size, FontStyle.Regular, GraphicsUnit.Point) : null;
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}
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}
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} |