如何使用skiasharp向现有图像添加文本

Question

我有现有的图像转换为base64，我想在它上面添加文本。然而，这只返回原始图像。你能告诉我哪里说错了吗?

var signatureData = Convert.FromBase64String(signature);
var stream = new MemoryStream(signatureData);
var signatureBitmap = SKBitmap.Decode(stream);
var canvas = new SKCanvas(signatureBitmap);
var origin = new SKPoint();
var paint = new SKPaint
{
TextSize = 10,
IsAntialias = true,
Color = SKColors.Black,
IsStroke = false
};
origin.X = 10;
origin.Y = 30;
paint.TextAlign = SKTextAlign.Left;
canvas.DrawText("text", origin, paint);
canvas.Flush();
var resultImage = SKImage.FromBitmap(signatureBitmap);
var data = resultImage.Encode(SKEncodedImageFormat.Png, 100);
return Convert.ToBase64String(data.ToArray());

Answer 1

这个张贴的问题实际上对我有用，只是位置错误，所以文本非常小