使用图形类设置插值后如何保存位图

发布于 2024-11-10 08:30:22 字数 750 浏览 8 评论 0原文

此代码调整图像大小并将其保存到磁盘。

using (var medBitmap = new Bitmap(fullSizeImage, newImageW, newImageH))
{
     medBitmap.Save(HttpContext.Current.Server.MapPath("~/Media/Items/Images/" + itemId + ".jpg"),
                    ImageFormat.Jpeg);
}

但如果我想使用图形类来设置插值，我该如何保存呢？图形类有一个 save 方法，但它不带任何参数。如何像位图一样将其保存到磁盘？这是修改后的代码片段：

using (var medBitmap = new Bitmap(fullSizeImage, newImageW, newImageH))
{
     var g = Graphics.FromImage(medBitmap);
     g.InterpolationMode = InterpolationMode.HighQualityBicubic;
     //What do I do now?
     medBitmap.Save(HttpContext.Current.Server.MapPath("~/Media/Items/Images/" + itemId + ".jpg"),
                    ImageFormat.Jpeg);
}

我只需要设置插值，然后将其保存到磁盘。

原文

This code resizes an image and saves it to disk.

using (var medBitmap = new Bitmap(fullSizeImage, newImageW, newImageH))
{
     medBitmap.Save(HttpContext.Current.Server.MapPath("~/Media/Items/Images/" + itemId + ".jpg"),
                    ImageFormat.Jpeg);
}

But if I want to use the graphics class to set the interpolation, how do I save it? The graphics class has a save method, but it doesn't take any parameters. How do I save it to disk like the bitmap? Heres a modified code snippet:

using (var medBitmap = new Bitmap(fullSizeImage, newImageW, newImageH))
{
     var g = Graphics.FromImage(medBitmap);
     g.InterpolationMode = InterpolationMode.HighQualityBicubic;
     //What do I do now?
     medBitmap.Save(HttpContext.Current.Server.MapPath("~/Media/Items/Images/" + itemId + ".jpg"),
                    ImageFormat.Jpeg);
}

I just need to set the interpolation and then save it to disk.

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暮色兮凉城 2024-11-17 08:30:22

在 Graphics 对象上调用 DrawImage 来更新位图：

using (var medBitmap = new Bitmap(fullSizeImage, newImageW, newImageH))
{
  using (var g = Graphics.FromImage(medBitmap))
  {
    g.InterpolationMode = InterpolationMode.HighQualityBicubic;
    g.DrawImage(medBitmap, 0, 0);
  }
  medBitmap.Save(HttpContext.Current.Server.MapPath("~/Media/Items/Images/" + itemId + ".jpg"), ImageFormat.Jpeg);
}

Call DrawImage on the Graphics object to update the bitmap:

using (var medBitmap = new Bitmap(fullSizeImage, newImageW, newImageH))
{
  using (var g = Graphics.FromImage(medBitmap))
  {
    g.InterpolationMode = InterpolationMode.HighQualityBicubic;
    g.DrawImage(medBitmap, 0, 0);
  }
  medBitmap.Save(HttpContext.Current.Server.MapPath("~/Media/Items/Images/" + itemId + ".jpg"), ImageFormat.Jpeg);
}

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