仅指定大小与GDI +和DOTNET创建迪布 [英] Creating a Dib by only specifying the size with GDI+ and DotNet

问题描述

我最近刚刚发现的GDI +不同的构造函数之间的差异。展望：

I have just recently discovered the difference between different constructors in GDI+. Going:

VAR BMP =新位图（宽度，高度，像素格式）;

创建一个DDB（设备相关位图），而：

creates a DDB (Device Dependent Bitmap) whereas:

VAR BMP =新位图（someFile）;

创建一个DIB（设备无关位​​图）。这实在不是一般的重要，处理非常大的图像时（其中一个DDB将耗尽内存，并且在取决于机器和显存上的不同大小的内存耗尽）的除外。我需要创建一个DIB而不是DDB，但指定的高度，宽度和像素格式。有谁知道如何做到这一点在DOTNET的。也就是有什么类型的位图（DIB或DDB）是由哪一个位图构造函数创建一个引导？

creates a DIB (Device Independent Bitmap). This is really not usually important, except when handling very large images (where a DDB will run out of memory, and run out of memory at different sizes depending on the machine and its video memory). I need to create a DIB rather than DDB, but specify the height, width and pixelformat. Does anyone know how to do this in DotNet. Also is there a guide to what type of Bitmap (DIB or DDB) is being created by which Bitmap constructor?

推荐答案

这似乎这样做是为了自己分配内存，然后再创建位图的最佳方式：

It appears the best way to do this is to allocate the memory yourself, and then then create the bitmap with:

var bmp = new Bitmap(width, height, stride, format, scan0)

这样，您就可以创造出巨大的位图，而无需内存不足的错误。

This way you can create huge bitmaps without having an out of memory error.

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