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使用自定义的TTF字体进行抽绳图像渲染

drawstring gdi+ fonts .net c#

Llyle · 技术社区 · 17 年前

我正在服务器端使用gdi+创建一个图像,该图像被流式传输到用户的浏览器。没有一种标准字体符合我的要求,因此我希望加载TrueType字体,并使用此字体将字符串绘制到图形对象:

using (var backgroundImage = new Bitmap(backgroundPath))
using (var avatarImage = new Bitmap(avatarPath))
using (var myFont = new Font("myCustom", 8f))
{
    Graphics canvas = Graphics.FromImage(backgroundImage);
    canvas.DrawImage(avatarImage, new Point(0, 0));

    canvas.DrawString(username, myFont,
        new SolidBrush(Color.Black), new PointF(5, 5));

    return new Bitmap(backgroundImage);
}

myCustom 表示服务器上未安装但有TTF文件的字体。

如何加载TTF文件以便在gdi+字符串呈现中使用它?

2 回复 | 直到 11 年前

Jay Riggs 14 年前

我找到了使用自定义字体的解决方案。

// 'PrivateFontCollection' is in the 'System.Drawing.Text' namespace
var foo = new PrivateFontCollection();
// Provide the path to the font on the filesystem
foo.AddFontFile("...");

var myCustomFont = new Font((FontFamily)foo.Families[0], 36f);

现在 myCustomFont 可与graphics.drawstring方法一起使用。

user890255 12 年前

只是为了给出一个更完整的解决方案

using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Drawing;
using System.Drawing.Text;

public partial class Test : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        string fontName = "YourFont.ttf";
        PrivateFontCollection pfcoll = new PrivateFontCollection();
        //put a font file under a Fonts directory within your application root
        pfcoll.AddFontFile(Server.MapPath("~/Fonts/" + fontName));
        FontFamily ff = pfcoll.Families[0];
        string firstText = "Hello";
        string secondText = "Friend!";

        PointF firstLocation = new PointF(10f, 10f);
        PointF secondLocation = new PointF(10f, 50f);
        //put an image file under a Images directory within your application root
        string imageFilePath = Server.MapPath("~/Images/YourImage.jpg");
        Bitmap bitmap = (Bitmap)System.Drawing.Image.FromFile(imageFilePath);//load the image file

        using (Graphics graphics = Graphics.FromImage(bitmap))
        {
            using (Font f = new Font(ff, 14, FontStyle.Bold))
            {
                graphics.DrawString(firstText, f, Brushes.Blue, firstLocation);
                graphics.DrawString(secondText, f, Brushes.Red, secondLocation);
            }
        }
        //save the new image file within Images directory
        bitmap.Save(Server.MapPath("~/Images/" + System.Guid.NewGuid() + ".jpg"));
        Response.Write("A new image has been created!");
    } 
}

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