ref: ef06d243c1a26abd9223181b8c5751ceb051258e
parent: 5613e3f978e406268fe5c42b7da322c0e4bfa7a9
author: giles <giles@ded80894-8fb9-0310-811b-c03f3676ab4d>
date: Mon Jun 24 19:28:13 EDT 2002
another checkpoint of text region decoding work. referred-to segment info is correct now. git-svn-id: http://svn.ghostscript.com/jbig2dec/trunk@92 ded80894-8fb9-0310-811b-c03f3676ab4d
--- a/jbig2.c
+++ b/jbig2.c
@@ -8,7 +8,7 @@
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
- $Id: jbig2.c,v 1.9 2002/06/22 16:05:45 giles Exp $
+ $Id: jbig2.c,v 1.10 2002/06/24 23:28:13 giles Exp $
*/
#include <stdint.h>
@@ -276,8 +276,8 @@
return 0;
code = jbig2_write_segment(ctx, segment, ctx->buf + ctx->buf_rd_ix);
ctx->buf_rd_ix += segment->data_length;
- jbig2_free_segment(ctx, segment);
- ctx->segments[ctx->segment_index] = NULL;
+// jbig2_free_segment(ctx, segment);
+// ctx->segments[ctx->segment_index] = NULL;
if (ctx->state == JBIG2_FILE_RANDOM_BODIES)
{ctx->segment_index++;
--- a/jbig2_priv.h
+++ b/jbig2_priv.h
@@ -8,7 +8,7 @@
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
- $Id: jbig2_priv.h,v 1.9 2002/06/24 15:51:57 giles Exp $
+ $Id: jbig2_priv.h,v 1.10 2002/06/24 23:28:13 giles Exp $
shared library internals
*/
@@ -110,10 +110,10 @@
int jbig2_complete_page (Jbig2Ctx *ctx, Jbig2Segment *segment, const byte *segment_data);
typedef enum {- JBIG2_COMPOSE_OR,
- JBIG2_COMPOSE_AND,
- JBIG2_COMPOSE_XOR,
- JBIG2_COMPOSE_XNOR
+ JBIG2_COMPOSE_OR = 0,
+ JBIG2_COMPOSE_AND = 1,
+ JBIG2_COMPOSE_XOR = 2,
+ JBIG2_COMPOSE_XNOR = 3
} Jbig2ComposeOp;
int jbig2_image_compose(Jbig2Ctx *ctx, Jbig2Image *dst, Jbig2Image *src, int x, int y, Jbig2ComposeOp op);
--- a/jbig2_segment.c
+++ b/jbig2_segment.c
@@ -8,7 +8,7 @@
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
- $Id: jbig2_segment.c,v 1.8 2002/06/24 18:44:45 giles Exp $
+ $Id: jbig2_segment.c,v 1.9 2002/06/24 23:28:13 giles Exp $
*/
#include <stdio.h>
@@ -70,7 +70,6 @@
referred_to_segments = jbig2_alloc(ctx->allocator, referred_to_segment_count * referred_to_segment_size);
for (i = 0; i < referred_to_segment_count; i++) {-
referred_to_segments[i] =
(referred_to_segment_size == 1) ? buf[offset] :
(referred_to_segment_size == 2) ? jbig2_get_int16(buf+offset) :
--- a/jbig2_text.c
+++ b/jbig2_text.c
@@ -8,11 +8,12 @@
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
- $Id: jbig2_text.c,v 1.4 2002/06/24 19:09:47 giles Exp $
+ $Id: jbig2_text.c,v 1.5 2002/06/24 23:28:13 giles Exp $
*/
#include <stddef.h>
#include <stdint.h>
+#include <stdio.h>
#include <string.h> /* memset() */
#ifdef HAVE_CONFIG_H
@@ -229,7 +230,7 @@
Jbig2SymbolDict **dicts;
int n_dicts;
uint32_t num_instances;
- uint16_t segment_flags;
+ uint16_t flags;
uint16_t huffman_flags;
int8_t sbrat[4];
int index;
@@ -242,19 +243,32 @@
offset += 17;
/* 7.4.3.1.1 */
- segment_flags = jbig2_get_int16(segment_data + offset);
+ flags = jbig2_get_int16(segment_data + offset);
offset += 2;
- if (segment_flags & 0x01) /* Huffman coding */
+ params.SBHUFF = flags & 0x0001;
+ params.SBREFINE = flags & 0x0002;
+ params.REFCORNER = (flags & 0x0030) >> 4;
+ params.TRANSPOSED = flags & 0x0040;
+ params.SBCOMBOP = (flags & 0x00e0) >> 7;
+ params.SBDEFPIXEL = flags & 0x0100;
+ params.SBDSOFFSET = (flags & 0x7C00) >> 10;
+ params.SBRTEMPLATE = flags & 0x8000;
+
+ if (params.SBHUFF) /* Huffman coding */
{/* 7.4.3.1.2 */
huffman_flags = jbig2_get_int16(segment_data + offset);
offset += 2;
+
+ if (huffman_flags & 0x8000)
+ jbig2_error(ctx, JBIG2_SEVERITY_WARNING, segment->number,
+ "reserved bit 15 of text region huffman flags is not zero");
}
else /* arithmetic coding */
{/* 7.4.3.1.3 */
- if ((segment_flags & 0x02) && !(segment_flags & 0x80)) /* SBREFINE & !SBRTEMPLATE */
+ if ((params.SBREFINE) && !(params.SBRTEMPLATE))
{sbrat[0] = segment_data[offset];
sbrat[0] = segment_data[offset + 1];
@@ -267,10 +281,26 @@
num_instances = jbig2_get_int32(segment_data + offset);
offset += 4;
- /* 7.4.3.1.7 */
- if (segment_flags & 0x01) {+ if (params.SBHUFF) {+ /* 7.4.3.1.5 */
+ /* todo: symbol ID huffman decoding table decoding */
+
jbig2_error(ctx, JBIG2_SEVERITY_WARNING, segment->number,
"symbol id huffman table decoding NYI");
+
+ /* 7.4.3.1.6 */
+ params.SBHUFFFS = (huffman_flags & 0x0003);
+ params.SBHUFFDS = (huffman_flags & 0x000c) >> 2;
+ params.SBHUFFDT = (huffman_flags & 0x0030) >> 4;
+ params.SBHUFFRDW = (huffman_flags & 0x00c0) >> 6;
+ params.SBHUFFRDH = (huffman_flags & 0x0300) >> 8;
+ params.SBHUFFRDX = (huffman_flags & 0x0c00) >> 10;
+ params.SBHUFFRDY = (huffman_flags & 0x3000) >> 12;
+ /* todo: conformance */
+ params.SBHUFFRSIZE = huffman_flags & 0x8000;
+
+ /* 7.4.3.1.7 */
+ /* todo: symbol ID huffman table decoding */
}
jbig2_error(ctx, JBIG2_SEVERITY_INFO, segment->number,
@@ -282,15 +312,19 @@
/* compose the list of symbol dictionaries */
n_dicts = 0;
for (index = 0; index < segment->referred_to_segment_count; index++) {- if (ctx->segments[segment->referred_to_segments[index]]->flags & 63 == 0)
+ int sindex = segment->referred_to_segments[index];
+ if ((ctx->segments[sindex]->flags & 63) == 0)
n_dicts++;
}
dicts = jbig2_alloc(ctx->allocator, sizeof(Jbig2SymbolDict *) * n_dicts);
for (index = 0; index < segment->referred_to_segment_count; index++) {+ int sindex = segment->referred_to_segments[index];
int dindex = 0;
- if (ctx->segments[segment->referred_to_segments[index]]->flags & 63 == 0)
- dicts[dindex++] = (Jbig2SymbolDict *)ctx->segments[segment->referred_to_segments[index]]->result;
+ if ((ctx->segments[sindex]->flags & 63) == 0)
+ dicts[dindex++] = (Jbig2SymbolDict *)ctx->segments[sindex]->result;
}
+ jbig2_error(ctx, JBIG2_SEVERITY_DEBUG, segment->number,
+ "refers to %d symbol dictionaries", n_dicts);
page_image = ctx->pages[ctx->current_page].image;
image = jbig2_image_new(ctx, region_info.width, region_info.height);