X2Go Bug report logs - #707
BPG as bitmap compression engine in NX

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Message #5 received at submit@bugs.x2go.org (full text, mbox, reply):

From: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

To: submit@bugs.x2go.org

Subject: BPG as bitmap compression engine in NX

Date: Thu, 18 Dec 2014 20:38:59 +0000

[Message part 1 (text/plain, inline)]

Package: libxcomp3
Severity: wishlist

Hi all,

By Savko Sergey I have just been pointed to the upcoming BPG image  
compression library [1].

Quoting their website:

"""
BPG (Better Portable Graphics) is a new image format. Its purpose is  
to replace the JPEG image format when quality or file size is an  
issue. Its main advantages are:

    High compression ratio. Files are much smaller than JPEG for  
similar quality.
    Supported by most Web browsers with a small Javascript decoder  
(gzipped size: 55 KB).
    Based on a subset of the HEVC open video compression standard.
    Supports the same chroma formats as JPEG (grayscale, YCbCr 4:2:0,  
4:2:2, 4:4:4) to reduce the losses during the conversion. An alpha  
channel is supported. The RGB, YCgCo and CMYK color spaces are also  
supported.
    Native support of 8 to 14 bits per channel for a higher dynamic range.
    Lossless compression is supported.
    Various metadata (such as EXIF, ICC profile, XMP) can be included.
"""

We should take a look at this new compression library and check if it  
is usable in NX.

Mike

[1] http://bellard.org/bpg/

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fon: +49 (1520) 1976 148

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Message #10 received at 707@bugs.x2go.org (full text, mbox, reply):

From: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

To: 707@bugs.x2go.org

Subject: Re: [X2Go-Dev] Bug#707: BPG as bitmap compression engine in NX

Date: Sat, 20 Feb 2016 20:46:40 +0000

[Message part 1 (text/plain, inline)]

Control: forwarded -1 https://github.com/ArcticaProject/nx-libs/issues/75
Control: tag -1 wontfix
Control: close -1

On  Do 18 Dez 2014 21:38:59 CET, Mike Gabriel wrote:

> Package: libxcomp3
> Severity: wishlist
>
> Hi all,
>
> By Savko Sergey I have just been pointed to the upcoming BPG image  
> compression library [1].
>
> Quoting their website:
>
> """
> BPG (Better Portable Graphics) is a new image format. Its purpose is  
> to replace the JPEG image format when quality or file size is an  
> issue. Its main advantages are:
>
>     High compression ratio. Files are much smaller than JPEG for  
> similar quality.
>     Supported by most Web browsers with a small Javascript decoder  
> (gzipped size: 55 KB).
>     Based on a subset of the HEVC open video compression standard.
>     Supports the same chroma formats as JPEG (grayscale, YCbCr  
> 4:2:0, 4:2:2, 4:4:4) to reduce the losses during the conversion. An  
> alpha channel is supported. The RGB, YCgCo and CMYK color spaces are  
> also supported.
>     Native support of 8 to 14 bits per channel for a higher dynamic range.
>     Lossless compression is supported.
>     Various metadata (such as EXIF, ICC profile, XMP) can be included.
> """
>
> We should take a look at this new compression library and check if  
> it is usable in NX.
>
> Mike
>
> [1] http://bellard.org/bpg/

The issue has been migrated to nx-libs issue tracker on Github.

As the issue is not critical to X2Go and an implementation on nx-libs  
3.5.x is out of reach, this bug gets closed and tagged "wontfix" (for  
X2Go with nx-libs 3.5.x).

Mike
-- 

DAS-NETZWERKTEAM
mike gabriel, herweg 7, 24357 fleckeby
fon: +49 (1520) 1976 148

GnuPG Key ID 0x25771B31
mail: mike.gabriel@das-netzwerkteam.de, http://das-netzwerkteam.de

freeBusy:
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