用于 BITMAPINFOHEADER 的 VS Image Watch 扩展 natvis? [英] VS Image Watch extension natvis for BITMAPINFOHEADER?

问题描述

Visual Studio 的 Image Watch 扩展 (http://goo.gl/TWre0X) 允许您查看调试时内存中的位图.非常有用，但是我试图定义一个 natvis 文件以允许查看 DIB 或 BITMAPINFOHEADER 甚至只是 BITMAPINFOH 对象.

The Image Watch extension for Visual Studio (http://goo.gl/TWre0X) allows you to see a bitmap in memory while debugging. Extremely useful, however I am stuck trying to define a natvis file to allow for viewing DIBs or BITMAPINFOHEADER or even just BITMAPINFO objects.

这是我目前拥有的:

  <?xml version="1.0" encoding="utf-8"?>
  <AutoVisualizer xmlns="http://schemas.microsoft.com/vstudio/debugger/natvis/2010">

    <UIVisualizer ServiceId="{A452AFEA-3DF6-46BB-9177-C0B08F318025}" Id="1"
                  MenuName="Add to Image Watch"/>

    <Type Name="BITMAPINFOHEADER">
      <UIVisualizer ServiceId="{A452AFEA-3DF6-46BB-9177-C0B08F318025}" Id="1" />
    </Type>

    <Type Name="BITMAPINFOHEADER">
      <Expand>
        <Synthetic Name="[type]">
          <DisplayString>UINT8</DisplayString>
        </Synthetic>
        <Synthetic Name="[channels]">
          <DisplayString>RGB</DisplayString>
        </Synthetic>
        <Item Name="[width]">biWidth</Item>
        <Item Name="[height]">biHeight</Item>
        <Item Name="[data]">(BYTE *)$ + sizeof(BITMAPINFOHEADER) + biClrUsed * 4</Item>
        <Item Name="[stride]">biBitCount*3</Item>
      </Expand>
    </Type>  

  </AutoVisualizer>

问题显然是[data]"部分，试图计算像素数据的偏移量.$ 是试图了解 natvis 文件真正在做什么的一个弱尝试.

The problem is clearly the "[data]" portion, trying to calculate the offset for the pixel data. The $ is a weak attempt at trying to understand what the natvis file is truly doing.

Image Watch 文档和一些用户定义类型的示例 natvis 文件(BITMAPINFOHEADER 如何属于用户定义，不知道为什么):http://goo.gl/zt2uCh

Docs for Image Watch and some example natvis files for user defined types (how BITMAPINFOHEADER falls under user defined, no idea why): http://goo.gl/zt2uCh

是否有人已经有一个 natvis 文件来处理和显示 Image Watch 的 BITMAPINFOHEADER 类型?或者有关于如何让这个工作的建议.谢谢.

Does anyone already have a natvis file that handles and displays the BITMAPINFOHEADER type for Image Watch? Or have a suggestion as to how to get this one to work. Thanks.

推荐答案

只需对您现有的内容稍作调整即可.

It only takes a bit of tweaking from what you have.

• 看起来您几乎可以使用调试器中的表达式，因此更改为仅使用this"代替 $
• 步幅是行的大小(以字节为单位).
• 对于结构，您必须使用标签命名空间名称，然后通过 AlternativeType 向 typedef 添加别名.
• 我的像素格式是 BGR
• 每行的字节大小必须是 4 的倍数，因此我还填充了步幅以匹配(Image Watch 似乎会丢弃不完整的像素).

<Type Name="tagBITMAPINFOHEADER">
    <AlternativeType Name="BITMAPINFOHEADER"></AlternativeType>
    <Expand>
        <Synthetic Name="[type]">
            <DisplayString Condition="biBitCount==24">UINT8</DisplayString>
            <DisplayString Condition="biBitCount==32">UINT8</DisplayString>
            <DisplayString Condition="biBitCount==48">UINT16</DisplayString>
        </Synthetic>
        <Synthetic Name="[channels]">
            <DisplayString Condition="biBitCount==32">BGRA</DisplayString>
            <DisplayString Condition="biBitCount==24">BGR</DisplayString>
            <DisplayString Condition="biBitCount==48">BGR</DisplayString>
        </Synthetic>
        <Item Name="[width]">biWidth</Item>
        <Item Name="[height]">biHeight</Item>
        <Item Name="[data]">((BYTE *)this) + sizeof(BITMAPINFOHEADER) + (biClrUsed * 4)</Item>
        <Item Name="[stride]">((biBitCount/8)*biWidth)+((4 - (((biBitCount/8)*biWidth)%4))%4)</Item>
    </Expand>
</Type>

这篇关于用于 BITMAPINFOHEADER 的 VS Image Watch 扩展 natvis?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！