CloudYxt.Imager 3.0.1

云享通.Net Core图形图像快捷操作库

从BASE64读取图片

var img = ImageBase64.FromString("data:image/png;base64,iVBORw0KGgoAAAA......");

获取图片格式名称

var format = img.RawFormatName();
Console.WriteLine(format);

重绘图片为静态网页RGB格式

var staticPic = img.ToRGBDraw();

清除图片的EXIF信息

img.ClearExif();

调整大小(可按比例)

/// <param name="w">重绘的宽度值，为0则不处理</param>
/// <param name="h">重绘的高度值，为0则不处理</param>
/// <param name="x">重绘的x定位位置，为0则不处理</param>
/// <param name="y">重绘的y定位位置，为0则不处理</param>
img.ToResize(w, h, x, y);

加水印(可按比例)

/// <param name="img_water">水印图</param>
/// <param name="x">水印距离原始图的x坐标位置，若为负数则从右向左计算</param>
/// <param name="y">水印距离原始图的y坐标位置，若为负数则从下向上计算</param>
/// <param name="mult">相对原始图的图片倍数，以宽计算，默认为0.28</param>
img.ToWater(img_water, x, y, mult);

将图片保存为字节数组

//同步方法
img.SaveToByte(new JpegEncoder()
{
    Quality = 100,
    SkipMetadata = true,
});

//异步方法
await img.SaveToByteAsync(new JpegEncoder()
{
    Quality = 100,
    SkipMetadata = true,
});

生成二维码

//创建QR生成器
var qr = QrCode.EncodeText(url, QrCode.Ecc.Medium);
//生成二维码字节数组
var data = qr.ToPng();

//ASP.NET输出到Response
Response.ContentType = "image/png";
await Response.Body.WriteAsync(data, 0, data.Length);

生成二维码的可选方法

/// <summary>
/// 生成QR为PNG格式的byte[]
/// </summary>
/// <param name="qrCode"></param>
/// <param name="scale">每个模块的宽度和高度，以像素为单位，默认为10</param>
/// <param name="border">添加到每个四边的边框模块的数量，默认为4</param>
/// <param name="foreground">二维码颜色</param>
/// <param name="background">背景色</param>
/// <param name="logoImage">二维码中间LOGO</param>
/// <returns></returns>
public static byte[] ToPng(this QrCode qrCode, int scale, int border, Color foreground, Color background, Image logoImage = null)

/// <summary>
/// 生成QR为PNG格式的byte[]
/// </summary>
/// <param name="qrCode"></param>
/// <param name="scale">每个模块的宽度和高度，以像素为单位，默认为10</param>
/// <param name="border">添加到每个四边的边框模块的数量，默认为4</param>
/// <param name="foreground">二维码颜色</param>
/// <param name="background">背景色</param>
/// <param name="logoUrl">二维码中间LOGO的URL地址</param>
/// <returns></returns>
public static async Task<byte[]> ToPngAsync(this QrCode qrCode, int scale, int border, Color foreground, Color background, string logoUrl)

/// <summary>
/// 生成QR为PNG格式的文件
/// </summary>
/// <param name="qrCode"></param>
/// <param name="filename">文件路径</param>
/// <param name="scale">每个模块的宽度和高度，以像素为单位，默认为10</param>
/// <param name="border">添加到每个四边的边框模块的数量，默认为4</param>
/// <param name="foreground">二维码颜色</param>
/// <param name="background">背景色</param>
/// <param name="logoImage">二维码中间LOGO</param>
public static void SaveAsPng(this QrCode qrCode, string filename, int scale, int border, Color foreground, Color background, Image logoImage = null)

/// <summary>
/// 生成QR为PNG格式的文件
/// </summary>
/// <param name="qrCode"></param>
/// <param name="filename">文件路径</param>
/// <param name="scale">每个模块的宽度和高度，以像素为单位，默认为10</param>
/// <param name="border">添加到每个四边的边框模块的数量，默认为4</param>
/// <param name="foreground">二维码颜色</param>
/// <param name="background">背景色</param>
/// <param name="logoUrl">二维码中间LOGO的URL地址</param>
public static async Task SaveAsPngAsync(this QrCode qrCode, string filename, int scale, int border, Color foreground, Color background, string logoUrl = null)