radio/lib/fontParser/tables/hmtx.cpp
2018-08-05 00:48:17 +03:00

60 lines
1.2 KiB
C++

#include "hmtx.h"
#include <arpa/inet.h>
Hmtx::Hmtx(const std::string& p_tag, uint32_t p_checkSum, uint32_t p_offset, uint32_t p_length):
Table(p_tag, p_checkSum, p_offset, p_length),
numOfLongHorMetrics(0),
longHorMetric(0)
{
}
Hmtx::~Hmtx()
{
delete longHorMetric;
}
void Hmtx::read(const std::string& path)
{
if (numOfLongHorMetrics == 0) {
throw 1;
}
std::ifstream file(path, std::ios::in | std::ios::binary);
file.seekg(offset);
char * buffer;
buffer = new char[2];
longHorMetric = new std::vector<HMetric>(numOfLongHorMetrics);
for (int i = 0; i < numOfLongHorMetrics; ++i) {
HMetric& met = longHorMetric->at(i);
file.read(buffer, 2);
uint16_t aw = ntohs(*((uint16_t*) buffer));
file.read(buffer, 2);
int16_t lsb = ntohs(*((int16_t*) buffer));
met.advanceWidth = aw;
met.leftSideBearing = lsb;
}
file.close();
delete[] buffer;
}
Hmtx::HMetric::HMetric():
advanceWidth(0),
leftSideBearing(0)
{
}
Hmtx::HMetric Hmtx::getMetric(uint16_t cid) const
{
if (cid >= longHorMetric->size()) {
cid = longHorMetric->size() - 1;
}
return longHorMetric->at(cid);
}