第二种方式
利用原来的GDI+方式
private BitmapSource MakePictureGDI(string bgImagePath, string headerImagePath, string signature)
{
GDI.Image bgImage = GDI.Bitmap.FromFile(bgImagePath);
GDI.Image headerImage = GDI.Bitmap.FromFile(headerImagePath);
//新建一个画板，画板的大小和底图一致
System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(bgImage.Width, bgImage.Height);
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);
//设置高质量插值法
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
//设置高质量,低速度呈现平滑程度
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//清空画布并以透明背景色填充
g.Clear(System.Drawing.Color.Transparent);
//先在画板上面画底图
g.DrawImage(bgImage, new GDI.Rectangle(0, 0, bitmap.Width, bitmap.Height));
//再在画板上画头像
int x = (bgImage.Width / 2 - headerImage.Width) / 2;
int y = (bgImage.Height - headerImage.Height) / 2 - 100;
g.DrawImage(headerImage, new GDI.Rectangle(x, y, headerImage.Width, headerImage.Height),
new GDI.Rectangle(0, 0, headerImage.Width, headerImage.Height),
GDI.GraphicsUnit.Pixel);
//在画板上写文字
using (GDI.Font f = new GDI.Font("Arial", 20, GDI.FontStyle.Bold))
{
using (GDI.Brush b = new GDI.SolidBrush(GDI.Color.White))
{
float fontWidth = g.MeasureString(signature, f).Width;
float x2 = (bgImage.Width / 2 - fontWidth) / 2;
float y2 = y + headerImage.Height + 20;
g.DrawString(signature, f, b, x2, y2);
}
}
try
{
string savePath = System.AppDomain.CurrentDomain.SetupInformation.ApplicationBase + @"GDI+合成.jpg";
bitmap.Save(savePath, System.Drawing.Imaging.ImageFormat.Jpeg);
return ToBitmapSource(bitmap);
}
catch (System.Exception e)
{
throw e;
}
finally
{
bgImage.Dispose();
headerImage.Dispose();
g.Dispose();
}
}
#region GDI+ Image 转化成 BitmapSource
[System.Runtime.InteropServices.DllImport("gdi32")]
static extern int DeleteObject(IntPtr o);
public BitmapSource ToBitmapSource(GDI.Bitmap bitmap)
{
IntPtr ip = bitmap.GetHbitmap();
BitmapSource bitmapSource = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
ip, IntPtr.Zero, System.Windows.Int32Rect.Empty,
System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions());
DeleteObject(ip);//释放对象
return bitmapSource;
}
#endregion
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希望本文所述对大家C#程序设计有所帮助。
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