507 lines
14 KiB
PHP
507 lines
14 KiB
PHP
<?php
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/**
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* Load.php
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*
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* @since 2011-05-23
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* @category Library
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* @package PdfFont
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* @author Nicola Asuni <info@tecnick.com>
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* @copyright 2011-2024 Nicola Asuni - Tecnick.com LTD
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* @license http://www.gnu.org/copyleft/lesser.html GNU-LGPL v3 (see LICENSE.TXT)
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* @link https://github.com/tecnickcom/tc-lib-pdf-font
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*
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* This file is part of tc-lib-pdf-font software library.
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*/
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namespace Com\Tecnick\Pdf\Font;
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use Com\Tecnick\File\Dir;
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use Com\Tecnick\Pdf\Font\Exception as FontException;
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/**
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* Com\Tecnick\Pdf\Font\Load
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*
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* @since 2011-05-23
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* @category Library
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* @package PdfFont
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* @author Nicola Asuni <info@tecnick.com>
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* @copyright 2011-2024 Nicola Asuni - Tecnick.com LTD
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* @license http://www.gnu.org/copyleft/lesser.html GNU-LGPL v3 (see LICENSE.TXT)
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* @link https://github.com/tecnickcom/tc-lib-pdf-font
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*
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* @phpstan-type TFontDataCidInfo array{
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* 'Ordering': string,
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* 'Registry': string,
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* 'Supplement': int,
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* 'uni2cid': array<int, int>,
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* }
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*
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* @phpstan-type TFontDataDesc array{
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* 'Ascent': int,
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* 'AvgWidth': int,
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* 'CapHeight': int,
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* 'Descent': int,
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* 'Flags': int,
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* 'FontBBox': string,
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* 'ItalicAngle': int,
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* 'Leading': int,
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* 'MaxWidth': int,
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* 'MissingWidth': int,
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* 'StemH': int,
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* 'StemV': int,
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* 'XHeight': int,
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* }
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*
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* @phpstan-type TFontDataEncTable array{
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* 'encodingID': int,
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* 'offset': int,
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* 'platformID': int,
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* }
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*
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* @phpstan-type TFontDataMode array{
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* 'bold': bool,
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* 'italic': bool,
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* 'linethrough': bool,
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* 'overline': bool,
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* 'underline': bool,
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* }
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*
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* @phpstan-type TFontDataTableItem array{
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* 'checkSum': int,
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* 'data': string,
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* 'length': int,
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* 'offset': int,
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* }
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*
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* @phpstan-type TFontData array{
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* 'Ascender': int,
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* 'Ascent': int,
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* 'AvgWidth': float,
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* 'CapHeight': int,
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* 'CharacterSet': string,
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* 'Descender': int,
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* 'Descent': int,
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* 'EncodingScheme': string,
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* 'FamilyName': string,
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* 'Flags': int,
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* 'FontBBox': array<int>,
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* 'FontName': string,
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* 'FullName': string,
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* 'IsFixedPitch': bool,
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* 'ItalicAngle': int,
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* 'Leading': int,
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* 'MaxWidth': int,
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* 'MissingWidth': int,
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* 'StdHW': int,
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* 'StdVW': int,
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* 'StemH': int,
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* 'StemV': int,
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* 'UnderlinePosition': int,
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* 'UnderlineThickness': int,
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* 'Version': string,
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* 'Weight': string,
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* 'XHeight': int,
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* 'bbox': string,
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* 'cbbox': array<int, array<int, int>>,
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* 'cidinfo': TFontDataCidInfo,
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* 'compress': bool,
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* 'ctg': string,
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* 'ctgdata': array<int, int>,
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* 'cw': array<int, int>,
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* 'datafile': string,
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* 'desc': TFontDataDesc,
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* 'diff': string,
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* 'diff_n': int,
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* 'dir': string,
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* 'dw': int,
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* 'enc': string,
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* 'enc_map': array<int, string>,
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* 'encodingTables': array<int, TFontDataEncTable>,
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* 'encoding_id': int,
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* 'encrypted': string,
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* 'fakestyle': bool,
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* 'family': string,
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* 'file': string,
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* 'file_n': int,
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* 'file_name': string,
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* 'i': int,
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* 'ifile': string,
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* 'indexToLoc': array<int, int>,
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* 'input_file': string,
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* 'isUnicode': bool,
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* 'italicAngle': float,
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* 'key': string,
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* 'lenIV': int,
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* 'length1': int,
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* 'length2': int,
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* 'linked': bool,
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* 'mode': TFontDataMode,
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* 'n': int,
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* 'name': string,
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* 'numGlyphs': int,
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* 'numHMetrics': int,
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* 'originalsize': int,
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* 'pdfa': bool,
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* 'platform_id': int,
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* 'settype': string,
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* 'short_offset': bool,
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* 'size1': int,
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* 'size2': int,
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* 'style': string,
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* 'subset': bool,
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* 'subsetchars': array<int, bool>,
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* 'table': array<string, TFontDataTableItem>,
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* 'tot_num_glyphs': int,
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* 'type': string,
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* 'underlinePosition': int,
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* 'underlineThickness': int,
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* 'unicode': bool,
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* 'unitsPerEm': int,
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* 'up': int,
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* 'urk': float,
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* 'ut': int,
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* 'weight': string,
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* }
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*/
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abstract class Load
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{
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/**
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* Valid Font types
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*
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* @var array<string, bool> Font types
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*/
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protected const FONTTYPES = [
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'Core' => true,
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'TrueType' => true,
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'TrueTypeUnicode' => true,
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'Type1' => true,
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'cidfont0' => true,
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];
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/**
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* Font data
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*
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* @var TFontData
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*/
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protected array $data = [
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'Ascender' => 0,
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'Ascent' => 0,
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'AvgWidth' => 0.0,
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'CapHeight' => 0,
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'CharacterSet' => '',
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'Descender' => 0,
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'Descent' => 0,
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'EncodingScheme' => '',
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'FamilyName' => '',
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'Flags' => 0,
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'FontBBox' => [],
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'FontName' => '',
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'FullName' => '',
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'IsFixedPitch' => false,
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'ItalicAngle' => 0,
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'Leading' => 0,
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'MaxWidth' => 0,
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'MissingWidth' => 0,
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'StdHW' => 0,
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'StdVW' => 0,
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'StemH' => 0,
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'StemV' => 0,
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'UnderlinePosition' => 0,
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'UnderlineThickness' => 0,
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'Version' => '',
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'Weight' => '',
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'XHeight' => 0,
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'bbox' => '',
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'cbbox' => [],
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'cidinfo' => [
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'Ordering' => '',
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'Registry' => '',
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'Supplement' => 0,
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'uni2cid' => [],
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],
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'compress' => false,
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'ctg' => '',
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'ctgdata' => [],
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'cw' => [],
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'datafile' => '',
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'desc' => [
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'Ascent' => 0,
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'AvgWidth' => 0,
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'CapHeight' => 0,
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'Descent' => 0,
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'Flags' => 0,
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'FontBBox' => '',
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'ItalicAngle' => 0,
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'Leading' => 0,
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'MaxWidth' => 0,
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'MissingWidth' => 0,
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'StemH' => 0,
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'StemV' => 0,
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'XHeight' => 0,
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],
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'diff' => '',
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'diff_n' => 0,
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'dir' => '',
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'dw' => 0,
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'enc' => '',
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'enc_map' => [],
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'encodingTables' => [],
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'encoding_id' => 0,
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'encrypted' => '',
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'fakestyle' => false,
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'family' => '',
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'file' => '',
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'file_n' => 0,
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'file_name' => '',
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'i' => 0,
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'ifile' => '',
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'indexToLoc' => [],
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'input_file' => '',
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'isUnicode' => false,
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'italicAngle' => 0,
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'key' => '',
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'lenIV' => 0,
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'length1' => 0,
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'length2' => 0,
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'linked' => false,
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'mode' => [
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'bold' => false,
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'italic' => false,
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'linethrough' => false,
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'overline' => false,
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'underline' => false,
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],
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'n' => 0,
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'name' => '',
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'numGlyphs' => 0,
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'numHMetrics' => 0,
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'originalsize' => 0,
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'pdfa' => false,
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'platform_id' => 0,
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'settype' => '',
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'short_offset' => false,
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'size1' => 0,
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'size2' => 0,
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'style' => '',
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'subset' => false,
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'subsetchars' => [],
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'table' => [],
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'tot_num_glyphs' => 0,
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'type' => '',
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'underlinePosition' => 0,
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'underlineThickness' => 0,
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'unicode' => false,
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'unitsPerEm' => 0,
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'up' => 0,
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'urk' => 0.0,
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'ut' => 0,
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'weight' => '',
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];
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/**
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* Load the font data
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*
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* @throws FontException in case of error
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*/
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public function load(): void
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{
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$this->getFontInfo();
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$this->checkType();
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$this->setName();
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$this->setDefaultWidth();
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if ($this->data['fakestyle']) {
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$this->setArtificialStyles();
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}
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$this->setFileData();
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}
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/**
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* Load the font data
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*
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* @throws FontException in case of error
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*
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* @SuppressWarnings("PHPMD.CyclomaticComplexity")
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*/
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protected function getFontInfo(): void
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{
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$this->findFontFile();
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// read the font definition file
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if (! @is_readable($this->data['ifile'])) {
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throw new FontException('unable to read file: ' . $this->data['ifile']);
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}
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$fdt = @file_get_contents($this->data['ifile']);
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if ($fdt === false) {
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throw new FontException('unable to read file: ' . $this->data['ifile']);
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}
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$fdtdata = @json_decode($fdt, true, 5, JSON_OBJECT_AS_ARRAY);
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if ($fdtdata === null) {
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throw new FontException('JSON decoding error [' . json_last_error() . ']');
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}
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if (! is_array($fdtdata) || (! isset($fdtdata['type']))) {
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throw new FontException('fhe font definition file has a bad format: ' . $this->data['ifile']);
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}
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$this->data = array_replace_recursive($this->data, $fdtdata);
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}
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/**
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* Returns a list of font directories
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*
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* @return array<string> Font directories
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*/
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protected function findFontDirectories(): array
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{
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$dir = new Dir();
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$dirs = [''];
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if (defined('K_PATH_FONTS')) {
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$dirs[] = K_PATH_FONTS;
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$glb = glob(K_PATH_FONTS . DIRECTORY_SEPARATOR . '*', GLOB_ONLYDIR);
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if ($glb !== false) {
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$dirs = [...$dirs, ...$glb];
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}
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}
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$parent_font_dir = $dir->findParentDir('fonts', __DIR__);
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if (($parent_font_dir !== '') && ($parent_font_dir !== '/')) {
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$dirs[] = $parent_font_dir;
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$glb = glob($parent_font_dir . DIRECTORY_SEPARATOR . '*', GLOB_ONLYDIR);
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if ($glb !== false) {
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$dirs = array_merge($dirs, $glb);
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}
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}
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return array_unique($dirs);
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}
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/**
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* Load the font data
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*
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* @throws FontException in case of error
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*/
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protected function findFontFile(): void
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{
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if (! empty($this->data['ifile'])) {
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$this->data['dir'] = dirname($this->data['ifile']);
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return;
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}
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$this->data['ifile'] = strtolower($this->data['key']) . '.json';
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// find font definition file names
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$files = array_unique(
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[strtolower($this->data['key']) . '.json', strtolower($this->data['family']) . '.json']
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);
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// directories where to search for the font definition file
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$dirs = $this->findFontDirectories();
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foreach ($files as $file) {
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foreach ($dirs as $dir) {
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if (@is_readable($dir . DIRECTORY_SEPARATOR . $file)) {
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$this->data['ifile'] = $dir . DIRECTORY_SEPARATOR . $file;
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$this->data['dir'] = $dir;
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break 2;
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}
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}
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// we haven't found the version with style variations
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$this->data['fakestyle'] = true;
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}
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}
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protected function setDefaultWidth(): void
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{
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if (! empty($this->data['dw'])) {
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return;
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}
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if ($this->data['desc']['MissingWidth'] > 0) {
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$this->data['dw'] = $this->data['desc']['MissingWidth'];
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} elseif (! empty($this->data['cw'][32])) {
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$this->data['dw'] = $this->data['cw'][32];
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} else {
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$this->data['dw'] = 600;
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}
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}
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/**
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* Check Font Type
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*/
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protected function checkType(): void
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{
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if (isset(self::FONTTYPES[$this->data['type']])) {
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return;
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}
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throw new FontException('Unknow font type: ' . $this->data['type']);
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}
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protected function setName(): void
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{
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if ($this->data['type'] == 'Core') {
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$this->data['name'] = (string) Core::FONT[$this->data['key']];
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$this->data['subset'] = false;
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} elseif (($this->data['type'] == 'Type1') || ($this->data['type'] == 'TrueType')) {
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$this->data['subset'] = false;
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} elseif ($this->data['type'] == 'TrueTypeUnicode') {
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$this->data['enc'] = 'Identity-H';
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} elseif (($this->data['type'] == 'cidfont0') && ($this->data['pdfa'])) {
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throw new FontException('CID0 fonts are not supported, all fonts must be embedded in PDF/A mode!');
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}
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if (empty($this->data['name'])) {
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$this->data['name'] = (string) $this->data['key'];
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}
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}
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/**
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* Set artificial styles if the font variation file is missing
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*/
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protected function setArtificialStyles(): void
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{
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// artificial bold
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if ($this->data['mode']['bold']) {
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$this->data['name'] .= 'Bold';
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$this->data['desc']['StemV'] = empty($this->data['desc']['StemV'])
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? 123 : (int) round($this->data['desc']['StemV'] * 1.75);
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}
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// artificial italic
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if ($this->data['mode']['italic']) {
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$this->data['name'] .= 'Italic';
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if (! empty($this->data['desc']['ItalicAngle'])) {
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$this->data['desc']['ItalicAngle'] -= 11;
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} else {
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$this->data['desc']['ItalicAngle'] = -11;
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}
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if (! empty($this->data['desc']['Flags'])) {
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$this->data['desc']['Flags'] |= 64; //bit 7
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} else {
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$this->data['desc']['Flags'] = 64;
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}
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}
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}
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public function setFileData(): void
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{
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if (empty($this->data['file'])) {
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return;
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}
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if (str_contains($this->data['type'], 'TrueType')) {
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$this->data['length1'] = $this->data['originalsize'];
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$this->data['length2'] = 0;
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} elseif ($this->data['type'] != 'Core') {
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$this->data['length1'] = $this->data['size1'];
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$this->data['length2'] = $this->data['size2'];
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}
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}
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}
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