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PDF_begin_template

(PHP 4 >= 4.0.5, PECL pdflib >= 1.0.0)

PDF_begin_template — Start template definition [deprecated]

说明

PDF_begin_template ( resource $pdfdoc , float $width , float $height ) : int

Starts a new template definition.

This function is deprecated since PDFlib version 7, use PDF_begin_template_ext() instead.

User Contributed Notes

rz at daimi dot au dot dk 27-Mar-2005 05:55


Sorry. In the previous note I somehow managed to include the same program twice.

The program that uses templates to draw the fractal is



<?php

function initmengers(&$pdf,$level) {

  static $mengers;

  if($level>0) initmengers($pdf,$level-1);

  $mengers[$level] = pdf_begin_template($pdf,1,1);

  if($level===0) {

    pdf_rect($pdf,$x,$y,1,1);

    pdf_fill($pdf);

  }

  else {

    for($i=0; $i<3; $i++)

      for($j=0; $j<3; $j++)

    if($i!=1 || $j!=1)

      pdf_place_image($pdf,$mengers[$level-1],$j/3,$i/3,1/3);

  }

  pdf_end_template($pdf);

  return $mengers[$level];

}

$pdf = pdf_new();

pdf_open_file($pdf);

$pic = initmengers($pdf,6);

pdf_begin_page($pdf, 595, 421);

pdf_place_image($pdf,$pic,50,50,300);

pdf_end_page($pdf);

pdf_close($pdf);

$data = pdf_get_buffer($pdf);

header('Content-type: application/pdf');

header('Content-disposition: inline; filename=test.pdf');

header('Content-length: ' . strlen($data));

echo $data;

pdf_delete($pdf);

?>

rz at daimi dot au dot dk 26-Mar-2005 08:23


A template is an "image" that can be drawn like a normal image, but is composed of pdflib-commands, directly specified in the program.

Templates can be used if you have a graphical pattern that you want to repeat several times - i.e. a logo repeated on top of each page. As the pdf-commands that draws the template are only included once in the file even if the template is shown several times, you can save a lot of space.



This program draws a simple fractal without the use of templates:



<?php

function drawmenger(&$pdf,$x,$y,$w,$level) {

  if($level===0) {

    pdf_rect($pdf,$x,$y,$w,$w);

    pdf_fill($pdf);

    return;

  }

  $w /= 3;

  for($i=0; $i<3; $i++)

    for($j=0; $j<3; $j++)

      if($i!=1 || $j!=1)

    drawmenger($pdf,$x+$w*$j,$y+$w*$i,$w,$level-1);

}

$pdf = pdf_new();

pdf_open_file($pdf);

pdf_begin_page($pdf, 595, 421);

drawmenger($pdf,50,50,300,6);



header('Content-type: application/pdf');

header('Content-disposition: inline; filename=test.pdf');

header('Content-length: ' . strlen($data));

echo $data;

pdf_end_page($pdf);

pdf_close($pdf);

pdf_delete($pdf);

?>



The file created is almost 1Mb.

Using templates to store the intermediate results reduces the filesize to a mere 3kb.



<?php

function drawmenger(&$pdf,$x,$y,$w,$level) {

  if($level===0) {

    pdf_rect($pdf,$x,$y,$w,$w);

    pdf_fill($pdf);

    return;

  }

  $w /= 3;

  for($i=0; $i<3; $i++)

    for($j=0; $j<3; $j++)

      if($i!=1 || $j!=1)

    drawmenger($pdf,$x+$w*$j,$y+$w*$i,$w,$level-1);

}

$pdf = pdf_new();

pdf_open_file($pdf);

pdf_begin_page($pdf, 595, 421);

drawmenger($pdf,50,50,300,6);



header('Content-type: application/pdf');

header('Content-disposition: inline; filename=test.pdf');

header('Content-length: ' . strlen($data));

echo $data;

pdf_end_page($pdf);

pdf_close($pdf);

pdf_delete($pdf);

?>

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PDF_begin_template

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