initial commit

lib/fontParser/tables/hhea.cpp

@@ -0,0 +1,76 @@
+#include "hhea.h"
+#include <arpa/inet.h>
+
+Hhea::Hhea(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),
+    ascent(0),
+    descent(0),
+    lineGap(0),
+    advanceWidthMax(0),
+    minLeftSideBearing(0),
+    minRightSideBearing(0),
+    xMaxExtent(0),
+    caretSlopeRise(0),
+    caretSlopeRun(0),
+    caretOffset(0),
+    numOfLongHorMetrics(0)
+{
+}
+
+Hhea::~Hhea()
+{
+}
+
+void Hhea::read(const std::string& path)
+{
+    char * buffer;
+    buffer = new char[2];
+    
+    std::ifstream file(path, std::ios::in | std::ios::binary);
+    file.seekg(offset);
+    
+    file.read(buffer, 2);   //version is not interesting, it is always 16.16 fixed point number equals to "1.0";
+    file.read(buffer, 2);   //version is not interesting, it is always 16.16 fixed point number equals to "1.0";
+    
+    file.read(buffer, 2);
+    ascent = ntohs(*((int16_t*) buffer));
+    
+    file.read(buffer, 2);
+    descent = ntohs(*((int16_t*) buffer));
+    
+    file.read(buffer, 2);
+    lineGap = ntohs(*((int16_t*) buffer));
+    
+    file.read(buffer, 2);
+    advanceWidthMax = ntohs(*((uint16_t*) buffer));
+    
+    file.read(buffer, 2);
+    minLeftSideBearing = ntohs(*((int16_t*) buffer));
+    
+    file.read(buffer, 2);
+    minRightSideBearing = ntohs(*((int16_t*) buffer));
+    
+    file.read(buffer, 2);
+    xMaxExtent = ntohs(*((int16_t*) buffer));
+    
+    file.read(buffer, 2);
+    caretSlopeRise = ntohs(*((int16_t*) buffer));
+    
+    file.read(buffer, 2);
+    caretSlopeRun = ntohs(*((int16_t*) buffer));
+    
+    file.read(buffer, 2);
+    caretOffset = ntohs(*((int16_t*) buffer));
+    
+    file.read(buffer, 2);   //reserved empty field, supposed to be 0;
+    file.read(buffer, 2);   //reserved empty field, supposed to be 0;
+    file.read(buffer, 2);   //reserved empty field, supposed to be 0;
+    file.read(buffer, 2);   //reserved empty field, supposed to be 0;
+    file.read(buffer, 2);   //metricDataFormat, it's supposed to be 0;
+    
+    file.read(buffer, 2);
+    numOfLongHorMetrics = ntohs(*((uint16_t*) buffer));
+    
+    delete[] buffer;
+    file.close();
+}