blog/cpp/fonts/core/tables/table.cpp

#include "table.h"
#include "table_name.h"
#include "../reader/buffer.h"
#include <iostream>
void FontTable::display()
{
    std::cout<<"table lists:"<<std::endl;
    for(auto it : _tables){
        std::cout<<"table "<<it.name<<" length:"<<it.length<<"\toffset:"<<it.offset<<"\tsum:"<<it.sum<<std::endl;
        auto iter = tableNameMap.find(it.name);
        if (iter == tableNameMap.end())
        {
            continue;
        }
        auto id = (*iter).second;
        switch (id)
        {
        case name:
            _name->display();
            break;
        
        default:
            break;
        }
    }
}

void FontTable::read(reader *rd, uint16_t count)
{
    for (auto i = 0; i < count; i++)
    {
        table t;
        t.name = rd->readString(4);
        t.sum = rd->readUint32();
        t.offset = rd->readUint32();
        t.length = rd->readUint32();
        _tables.push_back(t);
    }
    //读取表详情
    for (auto it: _tables)
    {   
        auto iter = tableNameMap.find(it.name);
        if (iter == tableNameMap.end())
        {
            continue;
        }
        auto id = (*iter).second;
        switch (id)
        {
        case tableName::name:
        {
            if(!rd->seek(it.offset)){
                throw "seek file failed";
            };
            auto data = rd->readString(it.length);
            buffer nameReader(data);
            _name = new NameTable();
            _name->read(&nameReader, it.length);
        }
        break;
        case tableName::cmap:
        {

            break;
        }
        case tableName::BASE:
        {
            break;
        }
        case tableName::head:
        {
            break;
        }
        case tableName::maxp:
        {
            break;
        }
        case tableName::glyf:
        {
            break;
        }
        default:
            break;
        }
    }
}

std::vector<table> FontTable::tables(){
    return _tables;
}