gistfile1.c

            uint16* dest = (uint16*) malloc(width * height * 4 * sizeof(uint16));
            short* subscript = (short*) imgData;
            for (unsigned long long i = 0; i < width * height; ++i) {
                uint16 x = subscript[i] + 1000;
                dest[i*4] = x;
            }