PRB: LoadImage Alters Color Table with 256 Color Bitmaps
Article ID: 195831
Article Last Modified on 2/22/2007
APPLIES TO
- Microsoft Windows 2000 Server
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Professional Edition
- Microsoft Windows NT Server 4.0 Standard Edition
- Microsoft Windows NT Workstation 4.0 Developer Edition
- Microsoft Windows XP Home Edition
- Microsoft Windows XP Professional
This article was previously published under Q195831
SYMPTOMS
When you load a .bmp file with the LoadImage API under Windows NT, the
color table of the loaded image might not match the color table of the
original .bmp file. Typically, this problem occurs when you load a 256
color image that has multiple color table entries with the same RGB value.
In these cases, the loading process causes each of the duplicated RGB
values to be remapped to the first occurrence in the color table of the
same RGB value.
NOTE: This behavior only occurs under Windows NT, Windows 2000, and Windows XP. It does not occur under Windows 95 or Windows 98.
RESOLUTION
The simplest way to work around this problem is to avoid using the
LoadImage() API, and use your own code to load the bitmaps.
Keywords: kbapi kbbitmap kbgdi kbprb KB195831