how to create an empty file with command

[manit]

i want to make 800x600 png file using only command line .
File should be empty that is background transparent.How can I do this ?
Actually I don't like to use graphical interface.

[Bonzo]

Code: Select all

convert -size 800x600 xc:none empty.png

[manit]

Thank you bonzo.
i have one more question .
QUESTION
I want to create a strip on which just lxuser is written.

what I normally do is
convert -size 800x600 xc:white empty.png
composite label:lxuser empty.png lxuser.png
Then i have to crop the 800x600 lxuser.png image since I want just the text .

i think there should be an easy way ?
what do you suggest ?

[fmw42]

try

convert -background white -size 800x label:"lxuser" -trim +repage lxuser.png


see using just width to specify the text for label and automatically fit font and text to that width at http://www.imagemagick.org/Usage/text/#label and -trim to remove any excess white

see -trim at http://www.imagemagick.org/script/comma ... s.php#trim

[manit]

from the link you pointed out
All guys who want to make image containing just text can do with following simple single (one line) command(credit to fmw42 and bonzo)

Code: Select all

convert -background white -fill black -pointsize 72 label:WhateverYouWantToWrite OutputFile

was the simplest because here we are just mentioning that pointsize should be 72 & imagemagick does rest of selecting picture dimensions(width as well as height).


But when I tried
convert -background lightblue -fill blue -font Candice -pointsize 72 label:Anthony label.gif
output was
convert: unable to read font `Candice'.
SOLUTION
i had to specify path to font file then it worked.
QUESTION
Can you tell command to find out fonts IM knows & how can we add to that list?

[Bonzo]

Depending on your IM version:

Code: Select all

convert -list type
or
convert -list font

[manit]

how can I see preview of all fonts supported ?

PS:I am pleased with prompt reply at this forum & amazed at plethora of things imagemagick can do though i know little about image manipulation.

[Bonzo]

If you can use php try the examples on this page:
http://www.rubblewebs.co.uk/imagemagick ... /fonts.php

Otherwise my previous post should list all the fonts. If I want to use a special font I just use the path with -font.

[fmw42]

how can I see preview of all fonts supported ?

PS:I am pleased with prompt reply at this forum & amazed at plethora of things imagemagick can do though i know little about image manipulation.

see show_fonts and imagick_type_gen scripts at http://www.imagemagick.org/Usage/scripts/

Unfortunately the author Anthony is on extended vacation.

[manit]

I want to learn basics of php .
How can it help in tedious work like sometimes I have to create hundreds of circle each of different colour then I put all command in script then execution takes time maybe because 'convert' has not been given the job collectively.

[Bonzo]

I have some more info on my website about php use but to answer your question about circles we need more info.