06.02-SixLabors.ImageSharp

操作图片

using SixLabors.Fonts;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.Drawing.Processing;
using SixLabors.ImageSharp.Processing;
using System.Threading.Tasks;
class Program
{
    static async Task Main()
    {
        string templatePath = "./证书.jpg";
        string sealPath = "./印章.png";
        var templateImage = await Image.LoadAsync(templatePath);
        var image = await MergeImageAsync(templateImage, sealPath, 20, 20);
        image.Save("合成后的证书.png");
        var templateImage2 = await Image.LoadAsync(templatePath);
        var image2 = await MergeImageAsync(templateImage2, sealPath, 20, 20, 50, 50);
        image2.Save("合成后的证书并改变印章大小.png");
        var contestName = "山东第一届体育赛事";
        var contestItemName = "田径赛项";
        var studentName = "张三";
        var awardName = "一等奖";
        var templateImage3 = await Image.LoadAsync(templatePath);
        var image3 = await MergeImageAsync(templateImage3, sealPath, 500, 500, 100, 100);
        AddMultilineText(image3, contestName, 12, 100, 200);
        AddMultilineText(image3, contestItemName, 12, 100, 300);
        AddMultilineText(image3, studentName, 12, 100, 400);
        AddMultilineText(image3, awardName, 12, 100, 500);
        image3.Save("证书带文字和印章.png");
    }
    /// <summary>
    /// 合并图片
    /// </summary>
    /// <param name="templateImage"></param>
    /// <param name="mergeImagePath">合并图片</param>
    /// <param name="x">X坐标</param>
    /// <param name="y">y坐标</param>
    /// <returns></returns>
    public static async Task<Image> MergeImageAsync(Image templateImage, string mergeImagePath, int x, int y)
    {
        // 加载需要合并的图片
        var mergeImage = await Image.LoadAsync(mergeImagePath);
        templateImage.Mutate(o =>
        {
            o.DrawImage(mergeImage, new Point(x, y), 1);
        });
        return templateImage;
    }
    /// <summary>
    /// 合并图片
    /// </summary>
    /// <param name="templateImage"></param>
    /// <param name="mergeImagePath">合并图片</param>
    /// <param name="x">X坐标</param>
    /// <param name="y">y坐标</param>
    /// <param name="width">宽度</param>
    /// <param name="height">高度</param>
    /// <returns></returns>
    public static async Task<Image> MergeImageAsync(Image templateImage, string mergeImagePath, int x, int y, int width, int height)
    {
        var mergeImage = await Image.LoadAsync(mergeImagePath);
        mergeImage.Mutate(m =>
        {
            m.Resize(new Size(width, height));
        });
        templateImage.Mutate(o =>
        {
            o.DrawImage(mergeImage, new Point(x, y), 1);
        });
        return templateImage;
    }
    /// <summary>
    /// 多行文本输出
    /// </summary>
    /// <param name="templateImage"></param>
    /// <param name="text"></param>
    /// <param name="fontSize"></param>
    /// <param name="x"></param>
    /// <param name="y"></param>
    /// <returns></returns>
    public static Image AddMultilineText(Image templateImage, string text, int fontSize, int x, int y)
    {
        var fonts = new FontCollection();
        fonts.AddSystemFonts();
        var fontFamily = fonts.Get("Microsoft YaHei");
        var font = new Font(fontFamily, fontSize, FontStyle.Bold);
        templateImage.Mutate(o =>
        {
            o.DrawText(text, font, Color.Black, new PointF(x, y));
        });
        return templateImage;
    }
}