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index.js
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index.js
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var sys = require('sys'), fs=require('fs'), path=require('path'), exec = require('child_process').exec;
var that=this;
that.tempdir='/tmp/';
var lastcommand
this.tryshm = function()
{
path.exists('/dev/shm/',function(exists) // try shm
{
if(exists)
{
path.exists('/dev/shm/node-pango-view',function(exists)
{
if(exists)
{
that.tempdir='/dev/shm/node-pango-view/';
}
else
{
fs.mkdir('/dev/shm/node-pango-view', 0777, function (err)
{
if(err) throw err;
else
that.tempdir='/dev/shm/node-pango-view/';
//callback();
});
}
});
}
});
}
this.tryshm();
var errorimage=""; //error image full path
var lastrandom=[]
var lastrandom_time=0;
function uniquerandom()
{
var newtime=(new Date()).getTime(),random;
if(lastrandom_time!=newtime&&lastrandom.length>0) lastrandom=[];
do
{
random=Math.floor(Math.random() * 9999);
} while (lastrandom.indexOf(random)!=-1);
lastrandom.push(random);
return (newtime*10000)+random;
} this.uniquerandom=uniquerandom();
function show_error(error, stdout, stderr)
{
if(stdout)console.log('pango-view_stdout: ' + stdout);
if(stderr)console.log('pango-view_stderr: ' + stderr);
if (error !== null)
{
console.log('node-pango-view last command: ' + lastcommand);
console.log('node-pango-view error: ' + error);
}
}
// <html>.
var exec_option={timeout:1500};
function write(text,options,callback)
{
var file=('file' in options) ? this.tempdir+options['file'] : this.tempdir+uniquerandom()+'.png';
var args_str='',args=[];
args.push('-q'); // command line only
if('background' in options) args.push('--background='+options['background']); else args.push('--background=transparent');
if(('markup' in options)) { if(options['markup']) args.push('--markup'); } else args.push('--markup');
if(('no-auto-dir' in options) && options['no-auto-dir']) args.push('--no-auto-dir');
if('dpi' in options) args.push('--dpi='+options['dpi']);
if('align' in options) args.push('--align='+options['align']);
if('ellipsize' in options) args.push('--ellipsize='+options['ellipsize']);
if('font' in options) args.push('--font='+options['font']);
if('color' in options) args.push('--foreground='+options['color']);
if('foreground' in options) args.push('--foreground='+options['foreground']);
if('gravity' in options) args.push('--gravity='+options['gravity']);
if('gravity-hint' in options) args.push('--gravity-hint='+options['gravity-hint']);
//if(('header' in options) && options['header']) args.push('--header');
if('height' in options) args.push('--height='+options['height']);
if('hinting' in options) args.push('--hinting='+options['hinting']);
if('indent' in options) args.push('--indent='+options['indent']);
if('gravity' in options) args.push('--gravity='+options['align']);
if(('justify' in options) && options['justify']) args.push('--justify');
if('language' in options) args.push('--language='+options['language']);
if('margin' in options) args.push('--margin='+options['margin']);
if(('pixels' in options) && options['pixels']) args.push('--pixels');
if(('rtl' in options) && options['rtl']) args.push('--rtl');
if('rotate' in options) args.push('--rotate='+options['rotate']);
if(('single-par' in options) && options['single-par']) args.push('--single-par');
//if(('version' in options) && options['version']) args.push('--version');
if(('waterfall' in options) && options['waterfall']) args.push('--waterfall');
if('width' in options) args.push('--width='+options['width']);
if('wrap' in options) args.push('--wrap='+options['wrap']);
// some more options here
args.push('--text='+text); // add text
args.push('--output='+file); // save to file only
for(var i=0;i<args.length;i++)
{
args_str+=" '"+args[i].replace(/[^\\]'/g, function(m)
{
return m.slice(0, 1)+'\\\'';
})+"'";
}
//child = exec('pangoview *.js bad_file | wc -l',
//console.log('pango-view '+args_str);
var cmd='export LANG=en_US.UTF-8;pango-view '+args_str,exec_option;
lastcommand=cmd;
var child = exec(cmd, show_error );
//var child = exec('export LANG=en_US.UTF-8;env ', show_error );
child.on('exit',function (code, signal) {if(code==0) callback(file); else callback(errorimage)});
} this.write=write;
function compose(bg_args_str,images,callback)
{
//bg is file
//images is array of [file,top,left,options];
var out_file= this.tempdir+uniquerandom()+'.png';
var imgs_args_str='',imgs_args=[];
for(var i=0;i<images.length;i++)
{
imgs_args.push(images[i]); // bg is 1st arument
//if(images[i].length>1) imgs_args.push(images[i][1]);
//imgs_args.push('-geometry');imgs_args.push('+'+images[i][1]+'+'+images[i][2]);
// some more options here
//imgs_args.push('-composite');
}
for(var i=0;i<imgs_args.length;i++)
{
imgs_args_str+=' '+imgs_args[i];
/*" '"+imgs_args[i].replace(/[^\\]'/g, function(m)
{
return m.slice(0, 1)+'\\\'';
})+"'";*/
}
//child = exec('pangoview *.js bad_file | wc -l',
//console.log('convert '+bg_args_str+' '+imgs_args_str+' '+out_file);
var cmd='convert '+bg_args_str+' '+imgs_args_str+' '+out_file,exec_option;
lastcommand=cmd;
var child = exec(cmd, show_error );
child.on('exit',function (code, signal) {if(code==0) callback(out_file); else callback(errorimage)});
} this.compose=compose;
function size(img_args_str,callback)
{
// console.log('identify '+img_args_str);
var cmd ='identify '+img_args_str,exec_option;
lastcommand=cmd;
var child = exec(cmd, function(err, stdout, stderr)
{
var result;
if (!err)
{
var v = stdout.split(/ +/);
var x = v[2].split(/x/);
var result =
{
format: v[1],
width: parseInt(x[0]),
height: parseInt(x[1]),
depth: parseInt(v[4]),
};
callback(result)
}
else
{
console.log(' error in identify');
var result =
{
format: '',
width: 1,
height: 1,
depth: 8,
'err':err,
};
callback(result)
}
});
//child.on('exit',function (code, signal) {if(code==0) callback(out_file); else callback(errorimage)});
} this.size=size;
function fonts(callback)
{
var cmd ='fc-list :lang=he -f %{family}\\\\n|sort -u';
lastcommand=cmd;
var child = exec(cmd,exec_option, function(err, stdout, stderr)
{
var result;
if (!err)
{
//console.log(stdout);
var result = stdout.split("\n");
//result.length--;
callback(result);
}
else
{
console.log(' error in identify');
var result =['error calling "fc-list -f %{family}\\\\n"'];
callback(result);
}
});
//child.on('exit',function (code, signal) {if(code==0) callback(out_file); else callback(errorimage)});
} this.fonts=fonts;
//convert bgs/morguefile_97997.jpg 12825167297205756.png -geometry +31+105 -composite 12825167297226952.png -geometry +31+205 -composite out6.png
/*
# pango-view --help-all
Usage:
pango-view [OPTION...] - FILE
Help Options:
-h, --help Show help options
--help-all Show all help options
--help-cairo Options understood by the cairo backend
Cairo backend options:
--annotate=1 or 2 Annotate the output
Application Options:
--no-auto-dir No layout direction according to contents
--backend=cairo/xft/ft2/x Pango backend to use for rendering (default: cairo)
--background=red/#rrggbb/#rrggbbaa/transparent Set the background color
-q, --no-display Do not display (just write to file or whatever)
--dpi=number Set the resolution
--align=left/center/right Text alignment
--ellipsize=start/middle/end Ellipsization mode
--font=description Set the font description
--foreground=red/#rrggbb/#rrggbbaa (changed to 'color') Set the text color
--gravity=south/east/north/west/auto Base gravity: glyph rotation
--gravity-hint=natural/strong/line Gravity hint
--header Display the options in the output
--height=+points/-numlines Height in points (positive) or number of lines (negative) for ellipsizing
--hinting=none/auto/full Hinting style
--indent=points Width in points to indent paragraphs
--justify Align paragraph lines to be justified
--language=en_US/etc Language to use for font selection
--margin=pixels Set the margin on the output in pixels
--markup Interpret text as Pango markup
-o, --output=file Save rendered image to output file
--pangorc=file pangorc file to use (default is ./pangorc)
--pixels Use pixel units instead of points (sets dpi to 72)
--rtl Set base direction to right-to-left
--rotate=degrees Angle at which to rotate results
-n, --runs=integer Run Pango layout engine this many times
--single-par Enable single-paragraph mode
-t, --text=string Text to display (instead of a file)
--version Show version numbers
--waterfall Create a waterfall display
-w, --width=points Width in points to which to wrap lines or ellipsize
--wrap=word/char/word-char Text wrapping mode (needs a width to be set)
*/
/*
to speed up things lets use tempfs
to fstab adda like like this:
//tmpfs /mnt/tmpfs tmpfs size=50m 0 0
instead i can use /dev/shm as path...
also i need a delete on interval function
/dev/shm
-resize x640 -gravity center -crop 240x640+0+0
convert logo: -resize x640 -gravity center -crop 240x640+0+0 +repage space_crop.jpg
*/