URL:
  <http://gna.org/bugs/?19508>

                 Summary: Loading PNGs: "Failed to convince libpng to convert
to RGBA (wrong color_type)" for paletted/indexed PNGs
                 Project: MyPaint
            Submitted by: achadwick
            Submitted on: Tue Feb 28 14:58:38 2012
                Severity: 4 - Important
                Priority: 5 - Normal
                  Status: Confirmed
                 Privacy: Public
             Assigned to: None
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: git d562b243
         Planned Release: None
        Operating System: 

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Details:

Reported by deevad in IRC. The exception

  "Failed to convince libpng to convert to RGBA (wrong color_type)"

is produced when trying to load any paletted PNG image, as confirmed with
pnginfo and saving new indexed PNG images from the GIMP. Exceedingly minimal
sample file attached. Backtrace at http://www.pasteall.org/29554

This seems to have been introduced in d562b243, according to git blame. The
weird thing is that, according to the libpng docs, the
png_set_palette_to_rgb() invocation is supposed to fix this



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File Attachments:


-------------------------------------------------------
Date: Tue Feb 28 14:58:38 2012  Name: demo_pixel.png  Size: 95B   By:
achadwick

<http://gna.org/bugs/download.php?file_id=15237>

    _______________________________________________________

Reply to this item at:

  <http://gna.org/bugs/?19508>

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