[Bug 38622] New: PixelFormat32bppARGB != PixelFormat8bppIndexed

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=38622

            Bug ID: 38622
           Summary: PixelFormat32bppARGB != PixelFormat8bppIndexed
           Product: Wine
           Version: 1.6.2
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: wine-bugs at winehq.org
          Reporter: mathieu.malaterre at gmail.com
      Distribution: ---

Created attachment 51527
  --> https://bugs.winehq.org/attachment.cgi?id=51527
source code

For some reason GDI+ on windows returns PixelFormat32bppARGB instead of
PixelFormat8bppIndexed for a grayscale PNG file (JPEG & TIFF seems consistant
though).

It would be nice if behavior would be consistant across implementation.

Compile and run attachements.

>From Linux:

$ ./gdidump.exe input.png
fixme:wincodecs:PngDecoder_Block_GetCount 0x142e30,0x61f708: stub
Width x Height: 512 512
PixelFormat8bppIndexed found !

>From Windows:

> gdidump.exe input.png
Width x Height: 512 512
PixelFormat32bppARGB found !

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