Set the JPEG quality level.
void pdfSetJPEGQuality(PDFHandle pdf, int quality)
This function sets the JPEG quality factor, which is a number from 0 to 100. 0 is the lowest quality and highest compression; 100 is the highest quality and lowest compression. You will generally want to use values in the 50-95 range. The default value is 75.
pdfResetBitmapParams function resets JPEG quality to the
default value of 75.