Dimmed icons look very differently, depending on Windows ver

[MarcinW]

Tested with TC 9.0a RC2 32-bit.

Dimmed icons look very differently, depending on Windows version.

This can be checked with dark background color in TC settings (I used navy blue):
- on Windows 7, it looks like expected - icon is blended with navy blue (both with classic theme and with Aero),
- on Windows 2000, it seems to be blended with some constant color (white or light gray), not with TC background color - this doesn't seem to be a right behavior.

Image:

Code: Select all

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[ghisler(Author)]

That's a known limitation of Windows versions before XP - they handle the ILD_BLEND50 parameter of ImageList_DrawEx differently than XP and newer. I guess that this happens because at the time, true color and high color screens were not yet very common, so the blended color was dithered.

For this reason, the dimmed hidden file option is enabled by default only on Windows XP and newer.

[MarcinW]

No, this must be some problem with TC. When I set navy blue for windows background, in Windows 2000 settings, Explorer displays dimmed icons blended properly, with navy blue - see the image attached.

But when I set navy blue for TC background, in TC settings, TC displays dimmed icons blended with white or light dark - but only below XP. On newer operating systems, TC uses background color from TC settings when blending, and this is right.

I guess that there is a fork in TC code for >= XP and for < XP. The first uses TC background color (from TC settings) when blending, and the latter uses some constant color by mistake.

Regards.

Code: Select all

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[MarcinW]

I found the affected code in 32-bit Totalcmd.exe 9.0a RC2:

Code: Select all

CODE:006037CD push    eax                             ; fStyle
CODE:006037CE mov     cl, 0FFh
CODE:006037D0 mov     dl, 0FFh
CODE:006037D2 mov     al, 0FFh
CODE:006037D4 call    sub_40664C                      ; make color value
CODE:006037D9 push    eax                             ; rgbFg
CODE:006037DA push    0FFFFFFFFh                      ; rgbBk

...           ...     ...

CODE:006037F8 call    ImageList_DrawEx

When I changed "mov cl, 0FFh" to "mov cl, 0" and "mov al, 0FFh" to "mov al, 0", I got dimmed icons blended with light green under Windows 2000. Currently, "push eax" at 0x006037D9 always pushes 0x00FFFFFF value, which is white. It should push TC background color instead.

Regards

[ghisler(Author)]

Why does it work with Windows 7, 8 and 10 then?

Currently there 7 locations where I call ImageList_DrawEx with rgb(255,255,255) as "foreground color of image". It's too risky to change that now, it could have many side effects I cannot estimate. Postponed to TC 9.01.

[milo1012]

This function might be affected by a manifest issue for common controls (version 6), which could explain the difference between 2000 <-> XP+, see:
http://web2.codeproject.com/Messages/1255807/Re-DrawIconEx-amp-amp-ILD-BLEND.aspx

But it seems that this GDI function is not the only one that changed between 2000 <-> XP due to common controls version change. I'm still trying to figure out how my APK-wdx plug-in can correctly blend icons in the Lister window on Win 2000. Or in other words: plug-in authors need to comply with the manifest laid out in TC's exe and probably implement workarounds for different OSes on their own.


2MarcinW
Quite bold to simply print the raw IDA disassembly output...

[MarcinW]

I'm still trying to figure out how my APK-wdx plug-in can correctly blend icons in the Lister window on Win 2000

Maybe this post may help.

Regards

[MarcinW]

Why does it work with Windows 7, 8 and 10 then

Because TC uses different code paths for Windows 2000 and Windows 7.

When, under Windows 7, I set the "Windows 2000" compatibility mode for Totalcmd.exe, it started to paint dimmed icons incorrectly - like under real Windows 2000. So this must depend on GetVersion value.

[ghisler(Author)]

I had to postpone TC 9.0a final to next week for other reasons, so I had some time to work on this. Please try RC3! I tested with Windows 2000 and Windows 95b, and it seems to work quite well. Please note that I only changed the 32-bit version - is there actually a 64-bit Windows 2000?

[Dalai]

[...] is there actually a 64-bit Windows 2000?

Nope. XP and Server 2003 were the first Windows OS to have 64 bit editions.

[EDIT] There was a bit missing [/EDIT]

Regards
Dalai

[MarcinW]

Fixed! Tested with Win NT4 SP6, Win 98 SE, Win ME, Win 2000 SP4.

[...] is there actually a 64-bit Windows 2000?

No, the first 64-bit Windows edition is Windows XP. Interestingly, 32-bit Windows XP has version number 5.1, while 64-bit Windows XP has version number 5.2 - exactly as 32-bit and 64-bit Windows Server 2003.

[ghisler(Author)]

Great, thanks! In this case, I don't need to change this in the 64-bit version.

[MarcinW]

There are still problems when drawing dimmed icons on some Win9x installations - this depends on comctl32.dll version, because some old versions don't handle even 16-bit blending.

I sent you a piece of code by email, that will solve the problem definitely.

Regards

[ghisler(Author)]

I don't think that there is much I can do, but is it really such a big problem? The files are displayed, just with dotted icons.

[MarcinW]

is much I can do

Please feel free to use the code that I sent you by email (it was too long to place it here). One function call and the problem is solved.

Regards