/**
* Constructor
*
* Instantiate a TTF 'hhea' table object.
*
* @param \Pop\Pdf\Build\Font\TrueType $font
* @return Hhea
*/
public function __construct(\Pop\Pdf\Build\Font\TrueType $font)
{
parent::__construct($this->allowed);
$bytePos = $font->tableInfo['hhea']->offset + 4;
$ary = unpack('nascent/' . 'ndescent', $font->read($bytePos, 4));
$ary = $font->shiftToSigned($ary);
$this->ascent = $font->toEmSpace($ary['ascent']);
$this->descent = $font->toEmSpace($ary['descent']);
$bytePos = $font->tableInfo['hhea']->offset + 34;
$ary = unpack('nnumberOfHMetrics/', $font->read($bytePos, 2));
$this->numberOfHMetrics = $ary['numberOfHMetrics'];
}
/**
* Constructor
*
* Instantiate a OTF 'OS/2' table object.
*
* @param \Pop\Pdf\Build\Font\TrueType $font
* @return Os2
*/
public function __construct(\Pop\Pdf\Build\Font\TrueType $font)
{
parent::__construct($this->allowed);
$this->flags = new \ArrayObject(['isFixedPitch' => false, 'isSerif' => false, 'isSymbolic' => false, 'isScript' => false, 'isNonSymbolic' => false, 'isItalic' => false, 'isAllCap' => false, 'isSmallCap' => false, 'isForceBold' => false], \ArrayObject::ARRAY_AS_PROPS);
$bytePos = $font->tableInfo['OS/2']->offset + 8;
$ary = unpack("nfsType", $font->read($bytePos, 2));
$this->embeddable = $ary['fsType'] != 2 && ($ary['fsType'] & 0x200) == 0;
$bytePos = $font->tableInfo['OS/2']->offset + 30;
$ary = unpack("nfamily_class", $font->read($bytePos, 2));
$familyClass = $font->shiftToSigned($ary['family_class']) >> 8;
if ($familyClass >= 1 && $familyClass <= 5 || $familyClass == 7) {
$this->flags->isSerif = true;
} else {
if ($familyClass == 8) {
$this->flags->isSerif = false;
}
}
if ($familyClass == 10) {
$this->flags->isScript = true;
}
if ($familyClass == 12) {
$this->flags->isSymbolic = true;
$this->flags->isNonSymbolic = false;
} else {
$this->flags->isSymbolic = false;
$this->flags->isNonSymbolic = true;
}
// Unicode bit-sniffing may not be necessary.
$bytePos += 3;
$ary = unpack('NunicodeRange1/' . 'NunicodeRange2/' . 'NunicodeRange3/' . 'NunicodeRange4', $font->read($bytePos, 16));
if ($ary['unicodeRange1'] == 1 && $ary['unicodeRange2'] == 0 && $ary['unicodeRange3'] == 0 && $ary['unicodeRange4'] == 0) {
$this->flags->isSymbolic = false;
$this->flags->isNonSymbolic = true;
}
$bytePos = $font->tableInfo['OS/2']->offset + 76;
$ary = unpack("ncap/", $font->read($bytePos, 2));
$this->capHeight = $font->toEmSpace($font->shiftToSigned($ary['cap']));
}
/**
* Constructor
*
* Instantiate a TTF 'glyf' table object.
*
* @param \Pop\Pdf\Build\Font\TrueType $font
* @return Glyf
*/
public function __construct(\Pop\Pdf\Build\Font\TrueType $font)
{
parent::__construct($this->allowed);
$locaLength = count($font->tables['loca']->offsets);
$j = 0;
foreach ($font->tables['loca']->offsets as $offset) {
$bytePos = $font->tableInfo['glyf']->offset + $offset;
$ary = unpack('nnumberOfContours/' . 'nxMin/' . 'nyMin/' . 'nxMax/' . 'nyMax', $font->read($bytePos, 10));
$ary = $font->shiftToSigned($ary);
$ary['xMin'] = $font->toEmSpace($ary['xMin']);
$ary['yMin'] = $font->toEmSpace($ary['yMin']);
$ary['xMax'] = $font->toEmSpace($ary['xMax']);
$ary['yMax'] = $font->toEmSpace($ary['yMax']);
$ary['width'] = $ary['xMin'] + $ary['xMax'];
$this->glyphWidths[] = $ary['width'];
$bytePos += 10;
$ary['endPtsOfContours'] = [];
$ary['instructionLength'] = null;
$ary['instructions'] = null;
$ary['flags'] = null;
// The simple and composite glyph descriptions may not be necessary.
// If simple glyph.
if ($ary['numberOfContours'] > 0) {
for ($i = 0; $i < $ary['numberOfContours']; $i++) {
$ar = unpack('nendPt', $font->read($bytePos, 2));
$ary['endPtsOfContours'][$i] = $ar['endPt'];
$bytePos += 2;
}
$ar = unpack('ninstructionLength', $font->read($bytePos, 2));
$ary['instructionLength'] = $ar['instructionLength'];
$bytePos += 2;
if ($ary['instructionLength'] > 0) {
for ($i = 0; $i < $ary['instructionLength']; $i++) {
$byte = $font->read($bytePos, 1);
if (strlen($byte) != 0) {
$ar = unpack('Cinstruction', $byte);
$ary['instructions'][$i] = $ar['instruction'];
$bytePos++;
} else {
$ary['instructions'][$i] = null;
}
}
}
$bytePos++;
$byte = $font->read($bytePos, 1);
if (strlen($byte) != 0) {
$ar = unpack('Cflags', $byte);
$ary['flags'] = $ar['flags'];
} else {
$ary['flags'] = 0;
}
if ($j < $locaLength - 1) {
$this->glyphs[] = $ary;
}
// Stopped here. Still need to get the x & y coordinates of the simple glyph.
// Else, if composite glyph.
} else {
if ($j < $locaLength - 1) {
// Composite glyph goes here.
}
}
$j++;
}
}