問(wèn)題描述

我需要另一個(gè)位圖的位圖深層副本.現(xiàn)在，大多數(shù)解決方案都說(shuō)類(lèi)似this，這不是深拷貝.這意味著當(dāng)我鎖定原始位圖時(shí)，副本也會(huì)被鎖定，因?yàn)榭寺∈窃嘉粓D的淺拷貝.現(xiàn)在以下似乎對(duì)我有用，但我不確定這是否適用于所有情況.

I need a deep copy of bitmap from another bitmap. Now, most of the solutions say something like this, which is not a deep copy. Meaning that when I lock the original bitmap, then the copy gets locked too, as the clone is a shallow copy of the original bitmap. Now the following seems to work for me, but I am not sure that will work in all cases.

public static Bitmap GetCopyOf(Bitmap originalImage)
{
    Rectangle rect = new Rectangle(0, 0, originalImage.Width, originalImage.Height);
    Bitmap retrunImage = new Bitmap(originalImage.Width, originalImage.Height, originalImage.PixelFormat);
    BitmapData srcData = originalImage.LockBits(rect, ImageLockMode.ReadOnly, originalImage.PixelFormat);
    BitmapData destData = retrunImage.LockBits(rect, ImageLockMode.WriteOnly, originalImage.PixelFormat);
    int dataLength = Math.Abs(srcData.Stride) * srcData.Height;
    byte[] data = new byte[dataLength];
    Marshal.Copy(srcData.Scan0, data, 0, data.Length);
    Marshal.Copy(data, 0, destData.Scan0, data.Length);
    destData.Stride = srcData.Stride;
    if (originalImage.Palette.Entries.Length != 0)
        retrunImage.Palette = originalImage.Palette;
    originalImage.UnlockBits(srcData);
    retrunImage.UnlockBits(destData);
    return retrunImage;
}

我需要更好、更優(yōu)雅的方式來(lái)做到這一點(diǎn).否則，請(qǐng)指出一些上述代碼可能會(huì)失敗的情況.TIA

I need better and more elegant way of doing this. Otherwise, just point me some cases where the above code may fail. TIA

推薦答案

我想我已經(jīng)通過(guò)使用這個(gè)片段解決了這個(gè)問(wèn)題.這個(gè)想法是由 Lanorkin 在評(píng)論中給出的，并且實(shí)現(xiàn)了 此處.希望這會(huì)在以后對(duì)某人有所幫助.

I think I have solved the problem by using this snippet. The idea was given by Lanorkin in the comment and the implementaion is found here. Hope this will help somebody later.

public static T Clone<T>(T source)
{
    if (!typeof(T).IsSerializable)
    {
        throw new ArgumentException("The type must be serializable.", "source");
    }

    // Don't serialize a null object, simply return the default for that object
    if (Object.ReferenceEquals(source, null))
    {
        return default(T);
    }

    IFormatter formatter = new BinaryFormatter();
    Stream stream = new MemoryStream();
    using (stream)
    {
        formatter.Serialize(stream, source);
        stream.Seek(0, SeekOrigin.Begin);
        return (T)formatter.Deserialize(stream);
    }
}

這篇關(guān)于從 C# 中的位圖創(chuàng)建一個(gè)全新的位圖副本的文章就介紹到這了，希望我們推薦的答案對(duì)大家有所幫助，也希望大家多多支持html5模板網(wǎng)！