2753             int sshift, dshift;  in png_do_read_interlace()  local
2764                 dshift = (int)((final_width + 7) & 0x07);  in png_do_read_interlace()
2773                 dshift = 7 - (int)((final_width + 7) & 0x07);  in png_do_read_interlace()
2784                   *dp &= (png_byte)((0x7f7f >> (7 - dshift)) & 0xff);  in png_do_read_interlace()
2785                   *dp |= (png_byte)(v << dshift);  in png_do_read_interlace()
2786                   if (dshift == s_end)  in png_do_read_interlace()
2788                      dshift = s_start;  in png_do_read_interlace()
2792                      dshift += s_inc;  in png_do_read_interlace()
2808             int sshift, dshift;  in png_do_read_interlace()  local
2817                dshift = (int)(((final_width + 3) & 0x03) << 1);  in png_do_read_interlace()
2826                dshift = (int)((3 - ((final_width + 3) & 0x03)) << 1);  in png_do_read_interlace()
2840                   *dp &= (png_byte)((0x3f3f >> (6 - dshift)) & 0xff);  in png_do_read_interlace()
2841                   *dp |= (png_byte)(v << dshift);  in png_do_read_interlace()
2842                   if (dshift == s_end)  in png_do_read_interlace()
2844                      dshift = s_start;  in png_do_read_interlace()
2848                      dshift += s_inc;  in png_do_read_interlace()
2864             int sshift, dshift;  in png_do_read_interlace()  local
2873                dshift = (int)(((final_width + 1) & 0x01) << 2);  in png_do_read_interlace()
2882                dshift = (int)((1 - ((final_width + 1) & 0x01)) << 2);  in png_do_read_interlace()
2895                   *dp &= (png_byte)((0xf0f >> (4 - dshift)) & 0xff);  in png_do_read_interlace()
2896                   *dp |= (png_byte)(v << dshift);  in png_do_read_interlace()
2897                   if (dshift == s_end)  in png_do_read_interlace()
2899                      dshift = s_start;  in png_do_read_interlace()
2903                      dshift += s_inc;  in png_do_read_interlace()