I am trying to use gd-1.8.4 libraries in C++ with FreeType2 on a Linux system. I did a make after editing Makefile to include the -DHAVE_LIBFREETYPE and -lfreetype along with the other libraries (I left out -DHAVE_LIBTTF and -lttf; will that be a problem?). The following is a portion of the program with interdispersed printf statements and following that is the output:

int ShowCurve(int intSize) {
gdImagePtr gdChart;
char *ptrResult;
int intTxtHght=0, intTxtWdth=0;
int intFntRect[8];
char *ptrDummy = "000000";
double dblFntSz = 0;
char *ptrCurrFnt = NULL;

// several nonrelated statements here

printf("ptrCurrFnt: %s, dblFntSz: %f\n", ptrCurrFnt, dblFntSz);
printf("ptrDummy: %s\n", ptrDummy);
ptrResult = gdImageStringFT(NULL, &intFntRect[0], 0, ptrCurrFnt, dblFntSz, 0., 0, 0, ptrDummy);
intTxtWdth = intFntRect[2]-intFntRect[6] + 6;
intTxtHght = intFntRect[3]-intFntRect[7] + 6;
printf("intTxtHght: %d intTxtWdth: %d\n", intTxtHght, intTxtWdth);
printf("intFntRect[2]: %d intFntRect[6]: %d\n", intFntRect[2], intFntRect[6]);

// remainder of this function follows

Below is the output from the program
ptrCurrFnt: /home/crvoss/Projects/AdvChart-0.1/fonts/bus.ttf, dblFntSz: 20.000000
ptrDummy: 000000
intTxtHght: 831162 intTxtWdth: 1208285958
intFntRect[2]: 134542760 intFntRect[6]: -1073743192


As can be seen from the output the font height and width are very large compared to the font size. What have I done wrong?