diff options
Diffstat (limited to 'ff2png.c')
| -rw-r--r-- | ff2png.c | 7 |
1 files changed, 4 insertions, 3 deletions
@@ -46,8 +46,8 @@ main(int argc, char *argv[]) fprintf(stderr, "invalid magic in header\n"); return 1; } - width = be32toh((hdr[9] << 0) | (hdr[10] << 8) | (hdr[11] << 16) | (hdr[12] << 24)); - height = be32toh((hdr[13] << 0) | (hdr[14] << 8) | (hdr[15] << 16) | (hdr[16] << 24)); + width = be32toh(*((uint32_t *)(hdr + 8))); + height = be32toh(*((uint32_t *)(hdr + 12))); /* load png */ png_struct_p = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); @@ -76,7 +76,8 @@ main(int argc, char *argv[]) fprintf(stderr, "unexpected EOF or row-skew\n"); return 1; } - png_row[j] = be16toh(tmp16) / (1 << 8); + /* ((2^16-1) / 255) == 257 */ + png_row[j] = (uint8_t)(be16toh(tmp16) / 257); } png_write_row(png_struct_p, png_row); } |