/**
* Get post data
*/
protected function getPostData()
{
$this->offset = $this->fdt['table']['post']['offset'];
$this->offset += 4;
// skip Format Type
$this->fdt['italicAngle'] = $this->fbyte->getFixed($this->offset);
$this->offset += 4;
$this->fdt['underlinePosition'] = round($this->fbyte->getFWord($this->offset) * $this->fdt['urk']);
$this->offset += 2;
$this->fdt['underlineThickness'] = round($this->fbyte->getFWord($this->offset) * $this->fdt['urk']);
$this->offset += 2;
$isFixedPitch = $this->fbyte->getULong($this->offset) == 0 ? false : true;
$this->offset += 2;
if ($isFixedPitch) {
$this->fdt['Flags'] |= 1;
}
}
/**
* Get the font type
*
* @param string $font_type Font type. Leave empty for autodetect mode.
*
* @return string
*/
protected function getFontType($font_type)
{
// autodetect font type
if (empty($font_type)) {
if (substr($this->font, 0, 16) == 'StartFontMetrics') {
// AFM type - we use this type only for the 14 Core fonts
return 'Core';
}
if (substr($this->font, 0, 4) == 'OTTO') {
throw new FontException('Unsupported font format: OpenType with CFF data');
}
if ($this->fbyte->getULong(0) == 0x10000) {
return 'TrueTypeUnicode';
}
return 'Type1';
}
if (strpos($font_type, 'CID0') === 0) {
return 'cidfont0';
}
if (in_array($font_type, array('Core', 'Type1', 'TrueType', 'TrueTypeUnicode'))) {
return $font_type;
}
throw new FontException('unknown or unsupported font type: ' . $font_type);
}
/**
* Extract chunks data from a PNG image
*
* @param string $data Image raw data
* @param int $offset Current byte offset
*
* @return array Image raw data array
*/
protected function getChunks($data, $offset)
{
$byte = new Byte($data['raw']);
while (($len = $byte->getULong($offset)) >= 0) {
$offset += 4;
$type = substr($data['raw'], $offset, 4);
$offset += 4;
if ($type == 'PLTE') {
$data = $this->getPlteChunk($data, $offset, $len);
} elseif ($type == 'tRNS') {
$data = $this->getTrnsChunk($data, $offset, $len);
} elseif ($type == 'IDAT') {
$data = $this->getIdatChunk($data, $offset, $len);
} elseif ($type == 'iCCP') {
$data = $this->getIccpChunk($byte, $data, $offset, $len);
} elseif ($type == 'IEND') {
// The image trailer chunk (IEND) must be the final chunk
// and marks the end of the PNG file or data stream.
break;
} else {
$offset += $len;
$offset += 4;
}
}
if ($data['colspace'] == 'Indexed' && empty($data['pal'])) {
// @codeCoverageIgnoreStart
throw new ImageException('The color palette is missing');
// @codeCoverageIgnoreEnd
}
return $data;
}
