Alpha channel is ignored for grayscale PNG
Moderators: XnTriq, helmut, xnview
Alpha channel is ignored for grayscale PNG
Examples:
XnView only displays alpha channel for the color image, not for the grayscale one.
XnView only displays alpha channel for the color image, not for the grayscale one.
Re: Alpha channel is ignored for grayscale PNG
MaxSt
Hello ! Welcome aboard !
• I can confirm that there's an issue ! Here, it's displayed as a full black square,
and shown as “8 BPP” in the status bar…
• This image is shown correctly in some other viewers, though, i.e. Imagine and Universal Viewer…
Kind regards,
Claude
Clo
Hello ! Welcome aboard !
• I can confirm that there's an issue ! Here, it's displayed as a full black square,
and shown as “8 BPP” in the status bar…
• This image is shown correctly in some other viewers, though, i.e. Imagine and Universal Viewer…
Kind regards,
Claude
Clo
Old user ON SELECTIVE STRIKE till further notice •
Re: Alpha channel is ignored for grayscale PNG
Yes, currently xnview doesn't support alpha for greyscale
Pierre.
Re: Alpha channel is ignored for grayscale PNG
Too bad. I hope it can be fixed. PNG is a very common format, it should be supported 100%.
I mean, XnView even reads animation chunks in png, surely reading alpha channel isn't much harder to implement.
I mean, XnView even reads animation chunks in png, surely reading alpha channel isn't much harder to implement.
Re2: Alpha channel is ignored for grayscale PNG
MaxSt
Hello !
• In fact, the Alpha channel IS supported, but when the pics contain colours hues,
not only grey ones, it seems…
- Since your pic has an A-channel, it might be processed as any 32 BPP PNG -like in other viewers- no matter whether there are colours hues or only grey ones.
Pierre, please ?
KR
Claude
Clo
Hello !
• In fact, the Alpha channel IS supported, but when the pics contain colours hues,
not only grey ones, it seems…
- Since your pic has an A-channel, it might be processed as any 32 BPP PNG -like in other viewers- no matter whether there are colours hues or only grey ones.
Pierre, please ?
KR
Claude
Clo
Old user ON SELECTIVE STRIKE till further notice •
Re: Alpha channel is ignored for grayscale PNG
Bump?
I'm very happy with all the PNG improvements in 1.97b1, but there is one basic PNG feature left - mode 4 (grayscale+alpha).
PNG mode 4 is still not supported by XnView.
I'm very happy with all the PNG improvements in 1.97b1, but there is one basic PNG feature left - mode 4 (grayscale+alpha).
PNG mode 4 is still not supported by XnView.
Re: Alpha channel is ignored for grayscale PNG
Yes, i've tried but need a lot of changes... So for the next time perhapsMaxSt wrote:PNG mode 4 is still not supported by XnView.
Pierre.
Re: Alpha channel is ignored for grayscale PNG
Maybe you can somehow use Win Picture Viewer as "engine" for this?
Re: Alpha channel is ignored for grayscale PNG
can finish it?
Re: Alpha channel is ignored for grayscale PNG
It's much worse now.
See:
Only the 1st of the 2 animations is working.
See:
Only the 1st of the 2 animations is working.