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From: Junio C Hamano <gitster@pobox•com>
To: Jeff King <peff@peff•net>
Cc: Scott Baker <bakers@canbytel•com>, git@vger•kernel.org
Subject: Re: [PATCH 5/7] parse_color: support 24-bit RGB values
Date: Thu, 20 Nov 2014 11:44:26 -0800	[thread overview]
Message-ID: <xmqqh9xt3bdx.fsf@gitster.dls.corp.google.com> (raw)
In-Reply-To: <20141120152539.GE23680@peff.net> (Jeff King's message of "Thu, 20 Nov 2014 10:25:39 -0500")

Jeff King <peff@peff•net> writes:

> Some terminals (like XTerm) allow full 24-bit RGB color
> specifications using an extension to the regular ANSI color
> scheme. Let's allow users to specify hex RGB colors,
> enabling the all-important feature of hot pink ref
> decorations:
>
>   git log --format="%h%C(#ff69b4)%d%C(reset) %s"
>
> Signed-off-by: Jeff King <peff@peff•net>
> ---
> Also no clue on which terminals support it. I did all of my testing on
> a recent version of XTerm. It looks like it doesn't provide true 24-bit
> support, though. It is happy to accept the 24-bit colors, but if you do:
>
>   for b in $(seq 255); do
>     h=$(printf %02x $b)
>     git --no-pager log -1 --format="%C(#0000$h)$b%C(reset)"
>   done
>
> the gradient seems to "jump" in discrete steps. That's fine, though.
> It's a quality-of-implementation issue for the terminal, and I still
> think that the RGB spec is way more readable than the 256-color mode
> ones.
>
>  Documentation/config.txt |  3 ++-
>  color.c                  | 29 ++++++++++++++++++++++++++++-
>  color.h                  |  6 +++---
>  t/t4026-color.sh         |  4 ++++
>  4 files changed, 37 insertions(+), 5 deletions(-)
>
> diff --git a/Documentation/config.txt b/Documentation/config.txt
> index f615a5c..a237b82 100644
> --- a/Documentation/config.txt
> +++ b/Documentation/config.txt
> @@ -842,7 +842,8 @@ doesn't matter.
>  +
>  Colors (foreground and background) may also be given as numbers between
>  0 and 255; these use ANSI 256-color mode (but note that not all
> -terminals may support this).
> +terminals may support this).  If your terminal supports it, you may also
> +specify 24-bit RGB values as hex, like `#ff0ab3`.
>  
>  color.diff::
>  	Whether to use ANSI escape sequences to add color to patches.
> diff --git a/color.c b/color.c
> index 6edbcae..78cdbed 100644
> --- a/color.c
> +++ b/color.c
> @@ -32,10 +32,13 @@ struct color {
>  		COLOR_UNSPECIFIED = 0,
>  		COLOR_NORMAL,
>  		COLOR_ANSI, /* basic 0-7 ANSI colors */
> -		COLOR_256
> +		COLOR_256,
> +		COLOR_RGB
>  	} state;
>  	/* The numeric value for ANSI and 256-color modes */
>  	unsigned char value;
> +	/* 24-bit RGB color values */
> +	unsigned char red, green, blue;

Do value and rgb have to be both valid at the same time, or is this
"we are not wasting a byte by not using a union because it will be
in the padding of the outer struct anyway"?

Not a satirical and/or rhetorical question.

  reply	other threads:[~2014-11-20 19:44 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <5462907B.1050207@canbytel.com>
2014-11-12  7:56 ` diff-highlight highlight words? Jeff King
2014-11-12 17:59   ` Scott Baker
2014-11-20 15:14     ` [PATCH 0/7] color fixes and configurable diff-highlight Jeff King
2014-11-20 15:15       ` [PATCH 1/7] docs: describe ANSI 256-color mode Jeff King
2014-11-20 15:15       ` [PATCH 2/7] config: fix parsing of "git config --get-color some.key -1" Jeff King
2014-11-20 15:16       ` [PATCH 3/7] t4026: test "normal" color Jeff King
2014-11-20 18:53         ` Junio C Hamano
2014-11-20 19:00           ` Jeff King
2014-11-20 15:17       ` [PATCH 4/7] parse_color: refactor color storage Jeff King
2014-11-20 19:37         ` Junio C Hamano
2014-12-09 20:14         ` Johannes Sixt
2014-12-09 20:21           ` Jeff King
2014-12-09 20:52             ` Johannes Sixt
2014-12-09 21:01               ` Jeff King
2014-12-09 20:56           ` Eric Sunshine
2014-11-20 15:25       ` [PATCH 5/7] parse_color: support 24-bit RGB values Jeff King
2014-11-20 19:44         ` Junio C Hamano [this message]
2014-11-20 20:10           ` Jeff King
2014-11-20 20:25             ` Junio C Hamano
2014-11-20 15:25       ` [PATCH 6/7] parse_color: recognize "no$foo" to clear the $foo attribute Jeff King
2014-11-20 19:46         ` Junio C Hamano
2014-11-20 15:29       ` [PATCH 7/7] diff-highlight: allow configurable colors Jeff King

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