Attatched WMF file is not shown correctly.

[Hidekazu TOZAKI]

I got some WMF files from http://www.newviewgraphics.com/dna/dna.zip and got attached file B_DNA.wmf.
This file and other ones are not shown correctly, that means it looks different on mspaint.exe on Windows. On mspaint, I see many ellipses drawn in 4 colors, gray, yellow, blue and red, however in Inkscape 0.92.3 on Windows 7 (64bit) and 0.91 r13725 on macOS High Sierra 10.13.4, only they are all in black.

[Alvin Penner (apenner)]

confirmed on Windows 10, Inkscape 0.92.3 (2405546, 2018-03-11)

[Hidekazu TOZAKI (a246246)]

So far as I could try, only mspaint and NewView Graphics File Viewer (http://www.newviewgraphics.com/viewer/viewer.htm ) --- it is free but no source is open --, can see this file in color.
LibreOffice (6.0.4) and EMF explorer (http://frazmitic.free.fr/emfexplorer/overview.htm ) shows it in black and white.

I checked B_DNA.wmf had find it has palette.
From parameter of CREATEPALETTE, it has the following 7 colors: #5f5f5f, #0000ff, #ff0000, #ffff00, #ff9900, #ff7c80, #000000, and I see many parameter patterns for CREATEBRUSHINDIRECT like [0, 0, 3, 0, 0, 1, 0, 0], [0, 0, 2, 0, 0, 1, 0, 0].
I do not know the spec of WMF in detail, but it looks yellow ellipses are written with the brush of [0, 0, 3, 0, 0, 1, 0, 0], red one are [0, 0, 2, 0, 0, 1, 0, 0] etc.
So I guess the param of CEATEBRUSHINDIRECT are treated as index color in mspaint, but as far as I see the spec of WMF https://winprotocoldoc.blob.core.windows.net/productionwindowsarchives/MS-WMF/[MS-WMF].pdf, the ColorRef part of this operand (Brush Object (2.2.1.1)), should be a ColorRef Object (2.2.2.8) when BrushStyle (2.1.1.4) is BS_SOLID (0x0000).

Apparently, [3, 0, 0, 1] is treated as 3rd color in palette in mspaint. If I change it to [3, 0, 0, 0] (and other operand of the same kind as well), using perl (comes from MSYS2),

$ perl -pe '$/=undef; s/(\xfc\x02\x00\x00[\x01-\x03]\x00\x00)\x01\x00\x00/$1\x00\x00\x00/g;' < B_DNA.wmf > tmp.wmf

mspaint.exe and NewView.exe shows the result wmf almost in black and white, [3, 0, 0] is treated as RGB, it is almost black. (Note that as I did not change the gray ellipses in the command above, so it stays.) Though I do not know it is a spec of WMF or undocumented feature. The 4th value of the part might be DIB_PAL_COLORS (= 1) or DIB_RGB_COLORS (= 0) of LOGBRUSH https://msdn.microsoft.com/ja-jp/library/windows/desktop/dd145035(v=vs.85).aspx (Also I do not understand the spec when the palette should be used.)

I hope this will be the help.

PS: In the original file [0, 0, 255, 255, 255, 0, 0] is also used as a operand of CREATEBRUSHINDIRECT but I'm not sure where it is used.
I have no other files I could test the other operator like CREATEPENINDIRECT that takes ColorRef as a parameter as well.

[Bartosz Kosiorek (gang65)]

I checked how this file is displayed with MS Office for Mac.
The results are the same (not shown correctly, whole DNA is black).