覆盖两个或多个位图中的PictureBox显示（C＃） [英] Overlay two or more Bitmaps to show in Picturebox (C#)
问题描述
在我的C＃程序我有一个PictureBox中，我要显示视频（连续帧）流。我收到的原始数据，我再转化为位图或图像。我可以显示一次一个图像没有问题（再现视频流）。
In my C# program I have a Picturebox in which i want to show a stream of video (consecutive frames). I receive raw data, that I then transform into Bitmap or Image. I can show one image at a time without a problem (to reproduce the video stream).
现在我的问题是，我想的合并2个或更多的位图（如层）具有相同的大小和Alpha值（ARGB），并显示在图片框
Now my issue is that I want to merge 2 or more bitmaps (like layers) with the same size and alpha values (ARGB) and show it on the picturebox.
我看过很多的网站和帖子在这里SO，但许多使用Graphics类的，我只是因为我是新的C＃不能得出它在我的应用程序（非常可能！而且已经有我的程序设置，所以我不想改变结构）。
I have read lots of websites and posts here on SO, but many use the Graphics class, and I just can't draw it on my application (very likely because i'm new to C#! and already have my program setup, so I didn't want to change the structure).
我需要什么（要知道）：的
What i need (to know):
- 如何叠加两个或两个以上的位图与alpha值;
- NO像素操作请不起性能的成本。
感谢你这么多提前！
注意：我觉得这个问题不应该被标记（或关闭）为重复的，因为一切都在我发现SO要么是与像素处理或通过图形类完成。 （但我可能是错的！）
NOTE: I think this question shouldn't be marked (or closed) as duplicate, because everything i found in SO is done either with pixel manipulation or through the Graphics class. (but I might be wrong!)
编辑：可能的解决方法（而不是解决问题的办法）结果
在
一个PictureBox问题，第四答案（来自用户comecme）告诉我有2个图片框，一个在顶部的另一个。唯一的（额外）的事情我不得不这样做，使其与这种方法工作是：
Possible workaround (NOT the solution to the question)
In
A PictureBox Problem, the 4th answer (from user comecme) tells me to have 2 picturebox, one on top of the other. The only (extra) thing I had to do to make it work with this approach was:
private void Form1_Load(object sender, EventArgs e)
{
pictureBox2.Parent = pictureBox1;
}
其中pictureBox2将在上面之一。
Where pictureBox2 will be the one on top.
我不认为这是一个回答这个问题，因为我认为这是一个解决方法（特别是因为有超过10 pictureboxes似乎并不理想！大声笑）。这就是为什么我会离开这个问题开等待真正回答我的问题。
I won't consider this an answer to this problem, because I consider it a workaround (specially because having more than 10 pictureboxes doesn't seem ideal! lol). That's why I will leave this question opened waiting for a real answer to my question.
编辑：解决了！检查我的答案。
推荐答案
下面是在真正回答我的问题。结果
1）使用列表与LT;位图＆GT; 来存储所有要混合的图像;结果
2）创建一个新的位图来保存最终的图像;结果
3）使用使用语句中的最终图像的的图形的上方绘制每个图像。
Here is the real answer to my problem.
1) Use a List<Bitmap> to store all the images you want to blend;
2) Create a new Bitmap to hold the final image;
3) Draw each image on top of the final image's graphics using the using statement.
的code：
List<Bitmap> images = new List<Bitmap>();
Bitmap finalImage = new Bitmap(640, 480);
...
//For each layer, I transform the data into a Bitmap (doesn't matter what kind of
//data, in this question) and add it to the images list
for (int i = 0; i < nLayers; ++i)
{
Bitmap bitmap = new Bitmap(layerBitmapData[i]));
images.Add(bitmap);
}
using (Graphics g = Graphics.FromImage(finalImage))
{
//set background color
g.Clear(Color.Black);
//go through each image and draw it on the final image (Notice the offset; since I want to overlay the images i won't have any offset between the images in the finalImage)
int offset = 0;
foreach (Bitmap image in images)
{
g.DrawImage(image, new Rectangle(offset, 0, image.Width, image.Height));
}
}
//Draw the final image in the pictureBox
this.layersBox.Image = finalImage;
//In my case I clear the List because i run this in a cycle and the number of layers is not fixed
images.Clear();
积分转至布兰登Cannaday
这篇关于覆盖两个或多个位图中的PictureBox显示（C＃）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
