lzw5399
commented
3 years ago public Bitmap CreateBitmapByImgVerifyCode(string verifyCode, int width, int height)
{
Random random = new Random();
Bitmap bitmap = new Bitmap(width, height);
Graphics g = Graphics.FromImage(bitmap);
using (var font = new Font("Arial", 36, (FontStyle.Bold | FontStyle.Italic)))
{
SizeF totalSizeF = g.MeasureString(verifyCode, font);
SizeF curCharSizeF;
PointF startPointF = new PointF(((width - totalSizeF.Width) / verifyCode.Length) / 2, (height - totalSizeF.Height) / 2);
g.Clear(Color.White);
for (int i = 0; i < verifyCode.Length; i++)
{
using (var brush = new LinearGradientBrush(new Point(0, 0), new Point(1, 1), Color.FromArgb(random.Next(255), random.Next(255), random.Next(255)), Color.FromArgb(random.Next(255), random.Next(255), random.Next(255))))
{
g.DrawString(verifyCode[i].ToString(), font, brush, startPointF);
curCharSizeF = g.MeasureString(verifyCode[i].ToString(), font);
startPointF.X += width / verifyCode.Length;
}
}
}
using (var pen = new Pen(Color.FromArgb(random.Next()), 5))
{
for (int i = 0; i < 20; i++)
{
int x1 = random.Next(bitmap.Width);
int x2 = random.Next(bitmap.Width);
int y1 = random.Next(bitmap.Height);
int y2 = random.Next(bitmap.Height);
g.DrawLine(pen, x1, y1, x2, y2);
}
}
for (int i = 0; i < 100; i++)
{
int x = random.Next(bitmap.Width);
int y = random.Next(bitmap.Height);
bitmap.SetPixel(x, y, Color.FromArgb(random.Next()));
}
using (var pen = new Pen(Color.Silver))
{
g.DrawRectangle(pen, 0, 0, bitmap.Width - 1, bitmap.Height - 1);
g.Dispose();
return bitmap;
}
}
public byte[] CreateByteByImgVerifyCode(string verifyCode, int width, int height)
{
using (var bitmap = CreateBitmapByImgVerifyCode(verifyCode, width, height))
{
using (var stream = new MemoryStream())
{
bitmap.Save(stream, ImageFormat.Jpeg);
return stream.ToArray();
}
}
}
qmfrederik
darkms
dockerfile
there is a captcha functionality that depend the
System.Drawing，the functionality works well before but it was broken recently, the error messageI found there is a new release of libgdiplus
(libgdiplus-6.0.5-r1)at 2021-Jan-24 04:13:39.And the early container that build from same dockerfile and install the
libgdiplus-6.0.5-r0works wellIs this package have any incompatible in alpine?
Regards.