diff options
Diffstat (limited to 'source/fitz/filter-lzw.c')
| -rw-r--r-- | source/fitz/filter-lzw.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/source/fitz/filter-lzw.c b/source/fitz/filter-lzw.c index ddc11f20..ff655c9e 100644 --- a/source/fitz/filter-lzw.c +++ b/source/fitz/filter-lzw.c @@ -32,6 +32,7 @@ struct fz_lzwd_s int early_change; + int reverse_bits; int min_bits; /* minimum num bits/code */ int code_bits; /* num bits/code */ int code; /* current code */ @@ -74,7 +75,10 @@ next_lzwd(fz_context *ctx, fz_stream *stm, int len) if (lzw->eod) return EOF; - code = fz_read_bits(ctx, lzw->chain, code_bits); + if (lzw->reverse_bits) + code = fz_read_rbits(ctx, lzw->chain, code_bits); + else + code = fz_read_bits(ctx, lzw->chain, code_bits); if (fz_is_eof_bits(ctx, lzw->chain)) { @@ -196,7 +200,7 @@ close_lzwd(fz_context *ctx, void *state_) /* Default: early_change = 1 */ fz_stream * -fz_open_lzwd(fz_context *ctx, fz_stream *chain, int early_change, int min_bits) +fz_open_lzwd(fz_context *ctx, fz_stream *chain, int early_change, int min_bits, int reverse_bits) { fz_lzwd *lzw = NULL; int i; @@ -215,6 +219,7 @@ fz_open_lzwd(fz_context *ctx, fz_stream *chain, int early_change, int min_bits) lzw->chain = chain; lzw->eod = 0; lzw->early_change = early_change; + lzw->reverse_bits = reverse_bits; lzw->min_bits = min_bits; lzw->code_bits = lzw->min_bits; lzw->code = -1; |