memshset
void memshset(char* dstParam, int center_shade, int fixed_shade, int half_length);
memshset(&gBuffer8[x0 + gWidth * (y0 - y + 1)], c, d, x);
memshset(&gBuffer8[x0 + gWidth*(y0 + y)], c, d, x);
memshset(&gBuffer8[x0 + gWidth*(y0 - x)], c, d, y);
memshset(&gBuffer8[x0 + gWidth * (y0 + x + 1)], c, d, y);