/**
* Get the PDF output string for Indexed palette object
*
* @param array $data Image raw data
*
* @return string
*/
protected function getOutPalette(&$data)
{
if ($data['colspace'] != 'Indexed') {
return '';
}
$data['obj_pal'] = ++$this->pon;
$stream = $this->enc->encryptString(gzcompress($data['pal']), $this->pon);
return $this->pon . ' 0 obj' . "\n" . '<</Filter /FlateDecode' . ' /Length ' . strlen($stream) . '>> stream' . "\n" . $stream . "\n" . 'endstream' . "\n" . 'endobj' . "\n";
}
/**
* Get the PDF output string for gradient shaders
*
* @param int $pon Current PDF Object Number
*
* @return string PDF command
*/
public function getOutGradientShaders($pon)
{
if ($this->pdfa || empty($this->gradients)) {
return '';
}
$this->pon = (int) $pon;
$idt = count($this->gradients);
// index for transparency gradients
$out = '';
foreach ($this->gradients as $idx => $grad) {
$out .= $this->getOutGradientCols($grad, 'color');
$this->gradients[$idx]['id'] = $this->pon - 1;
$this->gradients[$idx]['pattern'] = $this->pon;
$out .= $this->getOutGradientCols($grad, 'opacity');
$idgs = $idx + $idt;
$this->gradients[$idgs]['id'] = $this->pon - 1;
$this->gradients[$idgs]['pattern'] = $this->pon;
if ($grad['transparency']) {
$oid = ++$this->pon;
$pwidth = $this->pagew * $this->kunit;
$pheight = $this->pageh * $this->kunit;
$stream = 'q /a0 gs /Pattern cs /p' . $idgs . ' scn 0 0 ' . $pwidth . ' ' . $pheight . ' re f Q';
$stream = gzcompress($stream);
$stream = $this->enc->encryptString($stream, $oid);
$rect = sprintf('%F %F', $pwidth, $pheight);
$out .= $oid . ' 0 obj' . "\n" . '<<' . ' /Type /XObject' . ' /Subtype /Form' . ' /FormType 1' . ' /Filter /FlateDecode' . ' /Length ' . strlen($stream) . ' /BBox [0 0 ' . $rect . ']' . ' /Group << /Type /Group /S /Transparency /CS /DeviceGray >>' . ' /Resources <<' . ' /ExtGState << /a0 << /ca 1 /CA 1 >> >>' . ' /Pattern << /p' . $idgs . ' ' . $this->gradients[$idgs]['pattern'] . ' 0 R >>' . ' >>' . ' >>' . "\n" . ' stream' . "\n" . $stream . "\n" . 'endstream' . "\n" . 'endobj' . "\n";
// SMask
$objsm = ++$this->pon;
$out .= $objsm . ' 0 obj' . "\n" . '<<' . ' /Type /Mask' . ' /S /Luminosity' . ' /G ' . $oid . ' 0 R' . ' >>' . "\n" . 'endobj' . "\n";
// ExtGState
$objext = ++$this->pon;
$out .= ++$objext . ' 0 obj' . "\n" . '<<' . ' /Type /ExtGState' . ' /SMask ' . $objsm . ' 0 R' . ' /AIS false' . ' >>' . "\n" . 'endobj' . "\n";
$this->extgstates[] = array('n' => $objext, 'name' => 'TGS' . $idx);
}
}
return $out;
}
/**
* Get the PDF output string for a TrueTypeUnicode font.
* Based on PDF Reference 1.3 (section 5)
*
* @param array $font Font to process
*
* return string
*/
protected function getTrueTypeUnicode(array $font)
{
$fontname = '';
if ($font['subset']) {
// change name for font subsetting
$subtag = sprintf('%06u', $font['i']);
$subtag = strtr($subtag, '0123456789', 'ABCDEFGHIJ');
$fontname .= $subtag . '+';
}
$fontname .= $font['name'];
// Type0 Font
// A composite font composed of other fonts, organized hierarchically
// obj 1
$out = $font['n'] . ' 0 obj' . "\n" . '<< /Type /Font' . ' /Subtype /Type0' . ' /BaseFont /' . $fontname . ' /Name /F' . $font['i'] . ' /Encoding /' . $font['enc'] . ' /ToUnicode ' . ($this->pon + 1) . ' 0 R' . ' /DescendantFonts [' . ($this->pon + 2) . ' 0 R]' . ' >>' . "\n" . 'endobj' . "\n";
// ToUnicode Object
$out .= ++$this->pon . ' 0 obj' . "\n";
$stream = $this->enc->encryptString(gzcompress(Identity::CIDHMAP), $this->pon);
// ToUnicode map for Identity-H
$out .= '<</Filter /FlateDecode /Length ' . strlen($stream) . '>> stream' . "\n" . $stream . "\n" . 'endstream' . "\n" . 'endobj' . "\n";
// CIDFontType2
// A CIDFont whose glyph descriptions are based on TrueType font technology
$out .= ++$this->pon . ' 0 obj' . "\n" . '<< /Type /Font' . ' /Subtype /CIDFontType2' . ' /BaseFont /' . $fontname;
// A dictionary containing entries that define the character collection of the CIDFont.
$cidinfo = '/Registry ' . $this->enc->escapeDataString($font['cidinfo']['Registry'], $this->pon) . ' /Ordering ' . $this->enc->escapeDataString($font['cidinfo']['Ordering'], $this->pon) . ' /Supplement ' . $font['cidinfo']['Supplement'];
$out .= ' /CIDSystemInfo << ' . $cidinfo . ' >>' . ' /FontDescriptor ' . ($this->pon + 1) . ' 0 R' . ' /DW ' . $font['dw'] . "\n" . $this->getCharWidths($font, 0);
if (!empty($font['ctg'])) {
$out .= "\n" . '/CIDToGIDMap ' . ($this->pon + 2) . ' 0 R';
}
$out .= ' >>' . "\n" . 'endobj' . "\n";
// Font descriptor
// A font descriptor describing the CIDFont default metrics other than its glyph widths
$out .= ++$this->pon . ' 0 obj' . "\n" . '<< /Type /FontDescriptor' . ' /FontName /' . $fontname;
foreach ($font['desc'] as $key => $val) {
$out .= $this->getKeyValOut($key, $val);
}
if (!empty($font['file_n'])) {
// A stream containing a TrueType font
$out .= ' /FontFile2 ' . $font['file_n'] . ' 0 R';
}
$out .= ' >>' . "\n" . 'endobj' . "\n";
if (!empty($font['ctg'])) {
$out .= ++$this->pon . ' 0 obj' . "\n";
// Embed CIDToGIDMap
// A specification of the mapping from CIDs to glyph indices
// search and get CTG font file to embedd
$ctgfile = strtolower($font['ctg']);
// search and get ctg font file to embedd
$fontfile = $this->getFontFullPath($font['dir'], $ctgfile);
$stream = $this->enc->encryptString(file_get_contents($fontfile), $this->pon);
$out .= '<< /Length ' . strlen($stream) . '';
if (substr($fontfile, -2) == '.z') {
// check file extension
// Decompresses data encoded using the public-domain
// zlib/deflate compression method, reproducing the
// original text or binary data
$out .= ' /Filter /FlateDecode';
}
$out .= ' >>' . ' stream' . "\n" . $stream . "\n" . 'endstream' . "\n" . 'endobj' . "\n";
}
return $out;
}
/**
* Returns the PDF command to output the page content.
*
* @param int $pon Current PDF object number.
* @param string $content Page content.
*
* @return string PDF command
*/
protected function getPageContentObj(&$pon, $content = '')
{
$stream = $this->enc->encryptString(gzcompress($content), ++$pon);
$out = $pon . ' 0 obj' . "\n" . '<</Filter /FlateDecode /Length ' . strlen($stream) . '>>' . "\n" . 'stream' . "\n" . $stream . "\n" . 'endstream' . "\n" . 'endobj' . "\n";
return $out;
}
