在没有“大方块"的情况下放大图像(游戏地图). [英] Make an image (game map) bigger without "big squares"

问题描述

我在一个游戏中工作，该游戏中有动态高度和宽度的地图(例如30x30).在一个屏幕上，我想向更大的用户显示地图(政治地图).假设我要以600x600显示.
我知道，我可能无法使用.NET的经典方式，因为当我调整.NET的大小时，它就变得模糊了.避免模​​糊的唯一方法是设置InterpolationMode.NearestNeighbor.但是使用时是平方".
我只是想知道一件事-是否有一种调整大小的方法，该方法可以从旧像素中近似新像素而不是模糊它?
像
例举

我使用的是System.Drawing，而不是WPF

Hi,
I work on a game where is a map of dynamic height and width (for example 30x30). On one screen I want to display the map to user bigger (political map). Let''s say I want to display it in 600x600.
I understand, I probably cannot use classic ways of .NET, because when I resize it, it is blurred. The only way to not have it blurred is to set InterpolationMode.NearestNeighbor. However is is "squared" when I use it.
I am just wondering about one thing -Is there a resize method, which can approximate the new pixels from the old one instead of blurring it?
Something like
exaxmple

I use System.Drawing, not WPF

推荐答案

否，但是您可以轻松地渲染这样的东西.

如果您标记了问题，我将解释如何做:您使用的是什么:WPF或System.Drawing(是否带有System.Windows.Forms)?不要只是回答我的问题，请给它加上标签！ (您想吸引其他专家来回答您的问题，因此请务必非常准确地进行标记.)



对于System.Windows.Forms和System.Drawing，您首先需要获取一个像素数组.这是使用System.Drawing.Bitmap.LockBits完成的.您可以将其与System.Runtime.InteropServices.Marshal.Copy或unsafe模式下的指针一起使用.您可以在以下位置使用Marshal找到代码示例:
http://msdn.microsoft.com/en-us/library/5ey6h79d.aspx [ ^ ].

现在，您将其缩放为整数因子N(仅整数).这意味着每个像素应由正方形的N×N像素或均匀的颜色表示.您需要将所有这些正方形并排& msash;渲染.多达原始图片中的像素.您可以使用两种方法来做到这一点:

No, but you can easily render such thing.

I''ll explain how to do it if you tag your question: what do you use: WPF or System.Drawing (with System.Windows.Forms or not)? Don''t just answer my question, tag it! (You want to attract other experts to your question, so always tag very accurately.)



With System.Windows.Forms and System.Drawing, you first need to get an array of pixels. This is done using System.Drawing.Bitmap.LockBits. You can use it with either System.Runtime.InteropServices.Marshal.Copy or pointers in unsafe mode. You can find the code sample using Marshal here:
http://msdn.microsoft.com/en-us/library/5ey6h79d.aspx[^].

Now, you scale it by an integer factor N (only integer). It means each pixel should be represented by a square N×N pixel or the uniform color. You need to render all those squares side by side &msash; as many as pixels in the original picture. You can do it using two ways:

1. 使用与以前相同的代码示例，并查看如何使用LockBits和Marshal写入位图.主要区别是:您需要创建另一个位图进行渲染，将其放大N倍，并使用从原始位图读取的像素数组设置其中的所有像素
2. 您可以创建N次新的位图更大，使用静态方法System.Drawing.Graphics.FromImage创建它的实例System.Drawing.Graphics，并使用该实例和实例方法System.Drawing.Graphics.FillRectangle渲染所有矩形.

1. Use the same code sample as before and see how to write to a bitmap using LockBits and Marshal. The main difference is: you need to create another bitmap for rendering, N time bigger and set all pixels in it using the pixel array read from the original bitmap
2. You can create a new bitmap N times bigger, create an instance of it System.Drawing.Graphics using the static method System.Drawing.Graphics.FromImage and render all those rectangles using this instance and the instance method System.Drawing.Graphics.FillRectangle.

很难说哪种方法会更快.它也可能取决于您的缩放比例.请尝试一下.如果您分享您的结果，那就太好了.


无论如何，通过重新采样进行缩放是完全错误的方法.

您只需要使用矢量图形即可.有几种选择:使用您自己的数据层(向量基元的集合，无比例缩放，可伸缩)和针对每个比例动态渲染，基于图元文件进行渲染.我真的不想讨论这个问题，因为WPF胜过一切.它已经具有成熟的矢量图形，其中包含任何复杂性的对象，设计时或运行时，完全实现的缩放比例等等.几乎没有底层编程.完全没有渲染.我什至不愿意使用表单的想法.我希望它们已经过时了.
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—SA

Hard to say which method will be faster; it may also depends on your scaling factor. Please experiment. Would be nice if you share your results.


Scaling via re-sampling is completely wrong approach anyway.

You need to use vector graphics and nothing else. There are several options: using your own data layer (collection of vector primitive, scale-free, scalable) and rendering on the fly for each scale, rendering based on metafile. I don''t really want to discuss this because WPF beats all. It already has fully-fledged vector graphics with objects of any complexity, design-time or run-time, fully implemented scaling and more. Almost no low-level programming. No rendering at all. I would not even play with the idea of using Forms. They are getting obsolete anyway, I hope.
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—SA

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