html tags + arabic + Qt

Hello,

I am confusing with some strange things when using html tags with Arabic text.

For first for render text in Qlabel i use code:

Code:

QChar data[] = {1576,1616,1587,1618,1605,1616,
                    1649,1604,1604,1617,1614,1607,1616,
                    1649,1604,1585,1617,1614,1581,1618,
                    1605,1614,1648,1606,1616,1649,1604,
                    1585,1617,1614,1581,1616,1610,1605,1616};
 
    QString p(data,35);
 
    ui->label->setFont(QFont("Scheherazade",45));
    ui->label->setText(p);

The output:
Attachment 8502
there is all right and rendering is properly.

So i am using, for example, <em>arabic symbol</em> and write this code:

Code:

// 60,101,109,62   is <em> tag
  // 60,47,101,109,62 is </em> tag
 
            QChar data[] = {60,101,109,62,1576,1616,60,47,101,109,62,
                    1587,1618,1605,1616,
                    1649,1604,1604,1617,1614,1607,1616,
                    1649,1604,1585,1617,1614,1581,1618,
                    1605,1614,1648,1606,1616,1649,1604,
                    1585,1617,1614,1581,1616,1610,1605,1616};
 
    QString p(data,44);
 
    ui->label->setFont(QFont("Scheherazade",45));
    ui->label->setText(p);

The output:
Attachment 8503

also for this example <span style="color:red">arabic symbol</span>

Code:

QChar data[] = {
                    // <span style="color:red">
                    60,115,112,97,110,32,115,116,121,108,101,
                    61,34,99,111,108,111,114,58,114,101,100,34,62,
 
                    1576,1616,
 
                    60,47,115,112,97,110,62, //</span>
 
                    1587,1618,1605,1616,
                    1649,1604,1604,1617,1614,1607,1616,
                    1649,1604,1585,1617,1614,1581,1618,
                    1605,1614,1648,1606,1616,1649,1604,
                    1585,1617,1614,1581,1616,1610,1605,1616};
 
    QString p(data,66);
 
    ui->label->setFont(QFont("Scheherazade",45));
    ui->label->setText(p);

The output:
Attachment 8504

example for only first symbol

Code:

QChar data[] = {
                    // <span style="color:red">
                    60,115,112,97,110,32,115,116,121,108,101,
                    61,34,99,111,108,111,114,58,114,101,100,34,62,
 
                    1576,
 
                    60,47,115,112,97,110,62, //</span>
 
                    1616,1587,1618,1605,1616,
                    1649,1604,1604,1617,1614,1607,1616,
                    1649,1604,1585,1617,1614,1581,1618,
                    1605,1614,1648,1606,1616,1649,1604,
                    1585,1617,1614,1581,1616,1610,1605,1616};
 
    QString p(data,66);
 
    ui->label->setFont(QFont("Scheherazade",45));
    ui->label->setText(p);

The output:

Attachment 8505

Why when using html tags rendering is wrong? i check (color and em) in libreoffice with this font and all ok. But qt can't rendering it properly. Need help.

PS. The task is rendering highlighted Arabic text on Qt widgets (QLabel, QTextEdit, etc.)