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Groups > alt.os.linux > #57294
| From | owl <owl@rooftop.invalid> |
|---|---|
| Newsgroups | alt.os.linux |
| Subject | Re: reading / writing the color of an absolute pixel (x,y) of the physical screen |
| Date | 2019-06-26 23:05 +0000 |
| Organization | O.W.L. |
| Message-ID | <szv803ga.3ghui@rooftop.invalid> (permalink) |
| References | (4 earlier) <qevhdt$o4u$1@dont-email.me> <avi030fag.naoa@rooftop.invalid> <qevssk$l6u$3@dont-email.me> <s8z0b8803tag.au4@rooftop.invalid> <qf0fdj$6pp$2@dont-email.me> |
Soviet_Mario <SovietMario@cccp.mir> wrote:
> On 26/06/19 16:00, owl wrote:
>> Soviet_Mario <SovietMario@cccp.mir> wrote:
>>> On 26/06/19 14:35, owl wrote:
>>>> Soviet_Mario <SovietMario@cccp.mir> wrote:
>>>>> On 26/06/19 10:37, F. Russell wrote:
>>>>>> On Wed, 26 Jun 2019 01:13:47 +0200, Soviet_Mario wrote:
>>>>>>
>>>
>>> very kind ! I'll have a look if I don't get the native
>>> Gambas way to work
>>> Tnx
>>>
>>
>> xdotool helps a lot with x11 automation stuff:
>> This will give you color for a pixel at x y:
>> e.g. ./pixelcolor 100 300
>>
>> #!/bin/bash
>> (xdotool mousemove ${1} ${2}; xdotool click 1) |grabc
>>
>>
>> This will capture a rectangle x1 y1 x2 y2 to /tmp/out.png:
>> e.g. ./rectcapture 110 212 373 400
>>
>> #!/bin/bash
>> (xdotool mousemove ${1} ${2}
>> xdotool mousedown 1;
>> xdotool mousemove ${3} ${4}
>> xdotool mouseup 1) |scrot -s /tmp/out.png
>>
>>
>
> I would prefer to avoid both "shelling" and inter-processes
> switching if not strictly inevitable and/or if done rarely
> at big chunks at a time.
> One thing is to just load a library once at startup and then
> call its APIs, another is using multiple times (millions of
> times) cli commands.
>
You said you're not doing video graphics, so why would you need to
get a rectangle millions of times? If you're wanting to get the
pixels individually, look at the grabc source code.
https://github.com/immunant/grabc/blob/master/grabc.c
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reading / writing the color of an absolute pixel (x,y) of the physical screen Soviet_Mario <SovietMario@CCCP.MIR> - 2019-06-25 17:53 +0200
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen Alfonso P Cutaway <dweed54@gmail.com> - 2019-06-25 16:01 +0000
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen "R.Wieser" <address@not.available> - 2019-06-25 19:03 +0200
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen Alfonso P Cutaway <dweed54@gmail.com> - 2019-06-25 18:08 +0000
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen "R.Wieser" <address@not.available> - 2019-06-25 21:44 +0200
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen Alfonso P Cutaway <dweed54@gmail.com> - 2019-06-26 00:37 +0000
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen "R.Wieser" <address@not.available> - 2019-06-26 10:50 +0200
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen Alfonso P Cutaway <dweed54@gmail.com> - 2019-06-26 19:43 +0000
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen "Carlos E.R." <robin_listas@es.invalid> - 2019-06-26 22:37 +0200
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen Alfonso P Cutaway <dweed54@gmail.com> - 2019-06-26 20:55 +0000
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen "Carlos E.R." <robin_listas@es.invalid> - 2019-06-26 23:29 +0200
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen Aragorn <thorongil@telenet.be> - 2019-06-26 23:50 +0200
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen Alfonso P Cutaway <dweed54@gmail.com> - 2019-06-26 22:50 +0000
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen DecadentLinuxUserNumeroUno@decadence.org - 2019-06-28 12:50 +0000
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen DecadentLinuxUserNumeroUno@decadence.org - 2019-06-28 12:56 +0000
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen "R.Wieser" <address@not.available> - 2019-06-27 11:10 +0200
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen Soviet_Mario <SovietMario@CCCP.MIR> - 2019-06-27 12:39 +0200
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen "R.Wieser" <address@not.available> - 2019-06-27 14:43 +0200
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen Soviet_Mario <SovietMario@CCCP.MIR> - 2019-06-27 15:57 +0200
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen Soviet_Mario <SovietMario@CCCP.MIR> - 2019-06-26 01:03 +0200
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen Alfonso P Cutaway <dweed54@gmail.com> - 2019-06-26 00:38 +0000
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen Wildman <best_lay@yahoo.com> - 2019-06-25 11:18 -0500
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen Soviet_Mario <SovietMario@CCCP.MIR> - 2019-06-26 01:02 +0200
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen Aragorn <thorongil@telenet.be> - 2019-06-26 01:08 +0200
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen Bit Twister <BitTwister@mouse-potato.com> - 2019-06-25 11:48 -0500
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen Paul <nospam@needed.invalid> - 2019-06-25 16:14 -0400
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen Soviet_Mario <SovietMario@CCCP.MIR> - 2019-06-26 01:13 +0200
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen "F. Russell" <fr@random.info> - 2019-06-26 08:37 +0000
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen Soviet_Mario <SovietMario@CCCP.MIR> - 2019-06-26 12:29 +0200
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen Bit Twister <BitTwister@mouse-potato.com> - 2019-06-26 06:55 -0500
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen "F. Russell" <frussell@random.info> - 2019-06-26 12:15 +0000
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen owl <owl@rooftop.invalid> - 2019-06-26 12:35 +0000
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen Soviet_Mario <SovietMario@CCCP.MIR> - 2019-06-26 15:44 +0200
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen owl <owl@rooftop.invalid> - 2019-06-26 14:00 +0000
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen Soviet_Mario <SovietMario@CCCP.MIR> - 2019-06-26 21:01 +0200
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen owl <owl@rooftop.invalid> - 2019-06-26 23:05 +0000
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen Soviet_Mario <SovietMario@CCCP.MIR> - 2019-06-27 12:27 +0200
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen owl <owl@rooftop.invalid> - 2019-06-27 13:53 +0000
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen Jasen Betts <jasen@xnet.co.nz> - 2019-06-26 10:13 +0000
Re: reading / writing the color of an absolute pixel (x,y) of the physical screen Soviet_Mario <SovietMario@CCCP.MIR> - 2019-06-26 12:49 +0200
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