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

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From: owner@bugs.x2go.org (X2Go Bug Tracking System)
Subject: Bug#707 closed by Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
 (Re: [X2Go-Dev] Bug#707: BPG as bitmap compression engine in NX)
Message-ID: <handler.707.b707.14560012172153.notifdone@bugs.x2go.org>
References: <20160220204640.Horde.asoay0VLPb8HuQjjRJ5_wuL@mail.das-netzwerkteam.de>
X-X2go-PR-Keywords: wontfix
X-X2go-PR-Message: they-closed 707
X-X2go-PR-Package: libxcomp3
X-X2go-PR-Source: nx-libs
Date: Sat, 20 Feb 2016 20:50:03 +0000
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This is an automatic notification regarding your Bug report
which was filed against the libxcomp3 package:

#707: BPG as bitmap compression engine in NX

It has been closed by Mike Gabriel <mike.gabriel@das-netzwerkteam.de>.

Their explanation is attached below along with your original report.
If this explanation is unsatisfactory and you have not received a
better one in a separate message then please contact Mike Gabriel <mike.gabriel@das-netzwerkteam.de> by
replying to this email.


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707: http://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=707
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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

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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
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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 6 (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/

-- 

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:
https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.xfb

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