Legacy ImageMagick Discussions Archive

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convert - -fd3 -fd4 -fd5 -fd6 -append output.png

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<?php

// To run this script type: php SCRIPTNAME.php

// this script should output image-output.png which in theory is the following 5 images appended using convet -append
// in a real life situation these blobs would be coming from some other source such as another process's output descriptos or maybe even a database
$inputImageBlogA = file_get_contents('image-a.png');
$inputImageBlogB = file_get_contents('image-b.png');
$inputImageBlogC = file_get_contents('image-c.png');
$inputImageBlogD = file_get_contents('image-d.png');
$inputImageBlogE = file_get_contents('image-e.png');

// set up the descriptors
$descriptors = array(
  0 => array("pipe", "r"), // this is standard input
  1 => array("pipe", "w"), // this is standard output
  2 => array("pipe", "w"), // this is standard error
  3 => array("pipe", "r"), // this our custom input pipe to feed images
  4 => array("pipe", "r"), // this our custom input pipe to feed images
  5 => array("pipe", "r"), // this our custom input pipe to feed images
  6 => array("pipe", "r")  // this our custom input pipe to feed images
);

// build the command line
$commandLine = 'convert - -fd3 -fd4 -fd5 -fd6 -append image-output.png';
$processHandle = proc_open($commandLine, $descriptors, $pipes);

if(is_resource($processHandle)) {
  // push image E to pipe 6
  fwrite($pipes[6], $inputImageBlogE);
  fclose($pipes[6]);

  // push image D to pipe 5
  fwrite($pipes[5], $inputImageBlogD);
  fclose($pipes[5]);

  // push image C to pipe 4
  fwrite($pipes[4], $inputImageBlogC);
  fclose($pipes[4]);

  // push image B to pipe 3
  fwrite($pipes[3], $inputImageBlogB);
  fclose($pipes[3]);

  // push image A to pipe 0 (standard input)
  fwrite($pipes[0], $inputImageBlogA);
  fclose($pipes[0]);

  // read standardOut
  $standardOut = '';
  while(!feof($pipes[1])) {
    $standardOut .= fgets($pipes[1], 1024);
  }
  fclose($pipes[1]);

  // read standardError
  $standardError = '';
  while(!feof($pipes[2]))    {
    $standardError .= fgets($pipes[2], 1024);
  }
  fclose($pipes[2]);

  // close the process
  $returnCode = proc_close($processHandle);
} else {
  throw new Exception("Cannot run process");
}

echo "RETURNED CODE: $returnCode\n";
echo "STANDARD OUT: $standardOut\n";
echo "STANDARD ERR: $standardError\n";

?>

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   convert  /dev/fd3  /dev/fd/4  /dev/fd/5  -append  image-output.png

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<?php
  header('Content-Type: text/plain');
  system("exec 2>&1; echo shell is $SHELL");
?>

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   convert  rose:   -write fd:5   -swirl 90   fd:6

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   convert  rose:   -write jpeg:fd:5   -swirl 90   png:fd:6

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var arrow1JpgBase64, arrow2JpgBase64, arrowBuffer1, arrowBuffer2, magicCommands, imagic;

spawn = require('child_process').spawn;
exec = require('child_process').exec;

arrow1JpgBase64 = "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";
arrow2JpgBase64 = "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";
arrowBuffer1 = new Buffer(arrow1JpgBase64, 'base64');
arrowBuffer2 = new Buffer(arrow2JpgBase64, 'base64');
magicCommands = ["jpg:",
                 "in_2.jpg",
                 "+append",
                 "out.jpg"];

imagic = spawn("convert", magicCommands);
imagic.stdin.write(arrowBuffer1);
imagic.stdin.end();

imagic.on('exit', function (code) {
    if (code === 0) {
        exec("open out.jpg");
    } else {
        console.log("error code: " + code);
    }
}); // end of on exit