Fix composite glyph

[ren1244]

Fix Composite Glyph Output

Problem Reproduction

1. download kaiu.ttf and use dompdf/utils to load font
2. test code

<?php
require('vendor/autoload.php');

use Dompdf\Dompdf;

$dompdf = new Dompdf();
$dompdf->loadHtml('
    <style>
    .font-zh {
        font-family: "kaiu";
        font-size: 14;
    }
    </style>
 
    <p class="font-zh">月落烏啼霜滿天<br>江楓漁火對愁眠<br>姑蘇城外寒山寺<br>夜半鐘聲到客船</p>
');

$dompdf->setPaper('A4', 'protrait');

$dompdf->render();

$dompdf->stream('test.pdf', [
    'Attachment' => 0
]);

Related Reference

1. PDF 1.7 Reference page 468

The following TrueType tables are always required: “head,” “hhea,” “loca,” “maxp,” “cvt ,” “prep,” “glyf,” “hmtx,” and “fpgm.” If used with a simple font dictionary, the font program must additionally contain a “cmap” table.

2. The C pseudo-code in OpenType spec - glyf

do {
    uint16 flags;
    uint16 glyphIndex;
    if ( flags & ARG_1_AND_2_ARE_WORDS) {
    (int16 or FWORD) argument1;
    (int16 or FWORD) argument2;
    } else {
        uint16 arg1and2; /* (arg1 << 8) | arg2 */
    }
    if ( flags & WE_HAVE_A_SCALE ) {
        F2DOT14  scale;    /* Format 2.14 */
    } else if ( flags & WE_HAVE_AN_X_AND_Y_SCALE ) {
        F2DOT14  xscale;    /* Format 2.14 */
        F2DOT14  yscale;    /* Format 2.14 */
    } else if ( flags & WE_HAVE_A_TWO_BY_TWO ) {
        F2DOT14  xscale;    /* Format 2.14 */
        F2DOT14  scale01;   /* Format 2.14 */
        F2DOT14  scale10;   /* Format 2.14 */
        F2DOT14  yscale;    /* Format 2.14 */
    }
} while ( flags & MORE_COMPONENTS )
if (flags & WE_HAVE_INSTR){
    uint16 numInstr
    uint8 instr[numInstr]