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core/DjVuFile/libdjvu/JB2Image.cpp
Oleg.Korshul 746ccb420b сборка под линукс. странные правки (добавление this->) - не править. Это особенность компилятора gcc 
The problem is that templates are processed in two passes (according to the standard, VS does otherwise). In the first pass, before the type substitution, everything that does not depend on the template arguments is looked up and checked. Dependent names are then left to resolve in the second pass, once the type has been substituted. 

Now, in the first pass there is nothing that indicates that next is dependent on template arguments, and thus it needs to resolve before type substitution. Now, because the base type is templated on the template argument of your current template, the compiler cannot look into it (it might be specialized for some types, and without knowing what type T we are instantiating the template with, we cannot know which specialization to use, i.e. the base depends on T and we are checking before knowing T).

The trick of adding this-> turns next into a dependent name, and that in turn means that lookup is delayed until the second pass, where T is known, and because T is known, List<T> is also known and can be looked up into.


git-svn-id: svn://fileserver/activex/AVS/Sources/TeamlabOffice/trunk/ServerComponents@63683 954022d7-b5bf-4e40-9824-e11837661b57
2016-05-21 00:18:05 +03:00

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//C- -*- C++ -*-
//C- -------------------------------------------------------------------
//C- DjVuLibre-3.5
//C- Copyright (c) 2002 Leon Bottou and Yann Le Cun.
//C- Copyright (c) 2001 AT&T
//C-
//C- This software is subject to, and may be distributed under, the
//C- GNU General Public License, either Version 2 of the license,
//C- or (at your option) any later version. The license should have
//C- accompanied the software or you may obtain a copy of the license
//C- from the Free Software Foundation at http://www.fsf.org .
//C-
//C- This program is distributed in the hope that it will be useful,
//C- but WITHOUT ANY WARRANTY; without even the implied warranty of
//C- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
//C- GNU General Public License for more details.
//C-
//C- DjVuLibre-3.5 is derived from the DjVu(r) Reference Library from
//C- Lizardtech Software. Lizardtech Software has authorized us to
//C- replace the original DjVu(r) Reference Library notice by the following
//C- text (see doc/lizard2002.djvu and doc/lizardtech2007.djvu):
//C-
//C- ------------------------------------------------------------------
//C- | DjVu (r) Reference Library (v. 3.5)
//C- | Copyright (c) 1999-2001 LizardTech, Inc. All Rights Reserved.
//C- | The DjVu Reference Library is protected by U.S. Pat. No.
//C- | 6,058,214 and patents pending.
//C- |
//C- | This software is subject to, and may be distributed under, the
//C- | GNU General Public License, either Version 2 of the license,
//C- | or (at your option) any later version. The license should have
//C- | accompanied the software or you may obtain a copy of the license
//C- | from the Free Software Foundation at http://www.fsf.org .
//C- |
//C- | The computer code originally released by LizardTech under this
//C- | license and unmodified by other parties is deemed "the LIZARDTECH
//C- | ORIGINAL CODE." Subject to any third party intellectual property
//C- | claims, LizardTech grants recipient a worldwide, royalty-free,
//C- | non-exclusive license to make, use, sell, or otherwise dispose of
//C- | the LIZARDTECH ORIGINAL CODE or of programs derived from the
//C- | LIZARDTECH ORIGINAL CODE in compliance with the terms of the GNU
//C- | General Public License. This grant only confers the right to
//C- | infringe patent claims underlying the LIZARDTECH ORIGINAL CODE to
//C- | the extent such infringement is reasonably necessary to enable
//C- | recipient to make, have made, practice, sell, or otherwise dispose
//C- | of the LIZARDTECH ORIGINAL CODE (or portions thereof) and not to
//C- | any greater extent that may be necessary to utilize further
//C- | modifications or combinations.
//C- |
//C- | The LIZARDTECH ORIGINAL CODE is provided "AS IS" WITHOUT WARRANTY
//C- | OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
//C- | TO ANY WARRANTY OF NON-INFRINGEMENT, OR ANY IMPLIED WARRANTY OF
//C- | MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
//C- +------------------------------------------------------------------
//
// $Id: JB2Image.cpp,v 1.13 2007/03/25 20:48:32 leonb Exp $
// $Name: $
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#if NEED_GNUG_PRAGMAS
# pragma implementation
#endif
// From: Leon Bottou, 1/31/2002
// Lizardtech has split the corresponding cpp file into a decoder and an encoder.
// Only superficial changes. The meat is mine.
#include "JB2Image.h"
#include "GThreads.h"
#include "GRect.h"
#include "GBitmap.h"
#include <string.h>
#ifdef HAVE_NAMESPACES
namespace DJVU {
# ifdef NOT_DEFINED // Just to fool emacs c++ mode
}
#endif
#endif
////////////////////////////////////////
//// CLASS JB2Codec::Decode: DECLARATION
////////////////////////////////////////
// This class is accessed via the decode
// functions of class JB2Image
//**** Class JB2Codec
// This class implements the JB2 decoder.
// Contains all contextual information for decoding a JB2Image.
class JB2Dict::JB2Codec::Decode : public JB2Dict::JB2Codec
{
public:
Decode(void);
void init(const GP<ByteStream> &gbs);
// virtual
void code(const GP<JB2Image> &jim);
void code(JB2Image *jim) {const GP<JB2Image> gjim(jim);code(gjim);}
void code(const GP<JB2Dict> &jim);
void code(JB2Dict *jim) {const GP<JB2Dict> gjim(jim);code(gjim);}
void set_dict_callback(JB2DecoderCallback *cb, void *arg);
protected:
int CodeNum(const int lo, const int hi, NumContext &ctx);
// virtual
bool CodeBit(const bool bit, BitContext &ctx);
void code_comment(GUTF8String &comment);
void code_record_type(int &rectype);
int code_match_index(int &index, JB2Dict &jim);
void code_inherited_shape_count(JB2Dict &jim);
void code_image_size(JB2Dict &jim);
void code_image_size(JB2Image &jim);
void code_absolute_location(JB2Blit *jblt, int rows, int columns);
void code_absolute_mark_size(GBitmap &bm, int border=0);
void code_relative_mark_size(GBitmap &bm, int cw, int ch, int border=0);
void code_bitmap_directly(GBitmap &bm,const int dw, int dy,
unsigned char *up2, unsigned char *up1, unsigned char *up0 );
void code_bitmap_by_cross_coding (GBitmap &bm, GBitmap &cbm,
const int xd2c, const int dw, int dy, int cy,
unsigned char *up1, unsigned char *up0, unsigned char *xup1,
unsigned char *xup0, unsigned char *xdn1 );
int get_diff(const int x_diff,NumContext &rel_loc);
private:
GP<ZPCodec> gzp;
JB2DecoderCallback *cbfunc;
void *cbarg;
};
////////////////////////////////////////
//// CLASS JB2DICT: IMPLEMENTATION
////////////////////////////////////////
JB2Dict::JB2Dict()
: inherited_shapes(0)
{
}
void
JB2Dict::init()
{
inherited_shapes = 0;
inherited_dict = 0;
shapes.empty();
}
JB2Shape &
JB2Dict::get_shape(const int shapeno)
{
JB2Shape *retval;
if(shapeno >= inherited_shapes)
{
retval=&shapes[shapeno - inherited_shapes];
}else if(inherited_dict)
{
retval=&(inherited_dict->get_shape(shapeno));
}else
{
G_THROW( ERR_MSG("JB2Image.bad_number") );
retval = new JB2Shape();
}
return *retval;
}
const JB2Shape &
JB2Dict::get_shape(const int shapeno) const
{
const JB2Shape *retval;
if(shapeno >= inherited_shapes)
{
retval=&shapes[shapeno - inherited_shapes];
}else if(inherited_dict)
{
retval=&(inherited_dict->get_shape(shapeno));
}else
{
G_THROW( ERR_MSG("JB2Image.bad_number") );
retval = new JB2Shape();
}
return *retval;
}
void
JB2Dict::set_inherited_dict(const GP<JB2Dict> &dict)
{
if (shapes.size() > 0)
G_THROW( ERR_MSG("JB2Image.cant_set") );
if (inherited_dict)
G_THROW( ERR_MSG("JB2Image.cant_change") );
inherited_dict = dict;
inherited_shapes = dict->get_shape_count();
// Make sure that inherited bitmaps are marked as shared
for (int i=0; i<inherited_shapes; i++)
{
JB2Shape &jshp = dict->get_shape(i);
if (jshp.bits) jshp.bits->share();
}
}
void
JB2Dict::compress()
{
for (int i=shapes.lbound(); i<=shapes.hbound(); i++)
shapes[i].bits->compress();
}
unsigned int
JB2Dict::get_memory_usage() const
{
unsigned int usage = sizeof(JB2Dict);
usage += sizeof(JB2Shape) * shapes.size();
for (int i=shapes.lbound(); i<=shapes.hbound(); i++)
if (shapes[i].bits)
usage += shapes[i].bits->get_memory_usage();
return usage;
}
int
JB2Dict::add_shape(const JB2Shape &shape)
{
if (shape.parent >= get_shape_count())
G_THROW( ERR_MSG("JB2Image.bad_parent_shape") );
int index = shapes.size();
shapes.touch(index);
shapes[index] = shape;
return index + inherited_shapes;
}
void
JB2Dict::decode(const GP<ByteStream> &gbs, JB2DecoderCallback *cb, void *arg)
{
init();
JB2Codec::Decode codec;
codec.init(gbs);
codec.set_dict_callback(cb,arg);
codec.code(this);
}
////////////////////////////////////////
//// CLASS JB2IMAGE: IMPLEMENTATION
////////////////////////////////////////
JB2Image::JB2Image(void)
: width(0), height(0), reproduce_old_bug(false)
{
}
void
JB2Image::init(void)
{
width = height = 0;
blits.empty();
JB2Dict::init();
}
unsigned int
JB2Image::get_memory_usage() const
{
unsigned int usage = JB2Dict::get_memory_usage();
usage += sizeof(JB2Image) - sizeof(JB2Dict);
usage += sizeof(JB2Blit) * blits.size();
return usage;
}
void
JB2Image::set_dimension(int awidth, int aheight)
{
width = awidth;
height = aheight;
}
int
JB2Image::add_blit(const JB2Blit &blit)
{
if (blit.shapeno >= (unsigned int)get_shape_count())
G_THROW( ERR_MSG("JB2Image.bad_shape") );
int index = blits.size();
blits.touch(index);
blits[index] = blit;
return index;
}
GP<GBitmap>
JB2Image::get_bitmap(int subsample, int align) const
{
if (width==0 || height==0)
G_THROW( ERR_MSG("JB2Image.cant_create") );
int swidth = (width + subsample - 1) / subsample;
int sheight = (height + subsample - 1) / subsample;
int border = ((swidth + align - 1) & ~(align - 1)) - swidth;
GP<GBitmap> bm = GBitmap::create(sheight, swidth, border);
bm->set_grays(1+subsample*subsample);
for (int blitno = 0; blitno < get_blit_count(); blitno++)
{
const JB2Blit *pblit = get_blit(blitno);
const JB2Shape &pshape = get_shape(pblit->shapeno);
if (pshape.bits)
bm->blit(pshape.bits, pblit->left, pblit->bottom, subsample);
}
return bm;
}
GP<GBitmap>
JB2Image::get_bitmap(const GRect &rect, int subsample, int align, int dispy) const
{
if (width==0 || height==0)
G_THROW( ERR_MSG("JB2Image.cant_create") );
int rxmin = rect.xmin * subsample;
int rymin = rect.ymin * subsample;
int swidth = rect.width();
int sheight = rect.height();
int border = ((swidth + align - 1) & ~(align - 1)) - swidth;
GP<GBitmap> bm = GBitmap::create(sheight, swidth, border);
bm->set_grays(1+subsample*subsample);
for (int blitno = 0; blitno < get_blit_count(); blitno++)
{
const JB2Blit *pblit = get_blit(blitno);
const JB2Shape &pshape = get_shape(pblit->shapeno);
if (pshape.bits)
bm->blit(pshape.bits, pblit->left-rxmin, pblit->bottom-rymin+dispy, subsample);
}
return bm;
}
void
JB2Image::decode(const GP<ByteStream> &gbs, JB2DecoderCallback *cb, void *arg)
{
init();
JB2Codec::Decode codec;
codec.init(gbs);
codec.set_dict_callback(cb,arg);
codec.code(this);
}
////////////////////////////////////////
//// CLASS JB2CODEC : IMPLEMENTATION
////////////////////////////////////////
#define START_OF_DATA (0)
#define NEW_MARK (1)
#define NEW_MARK_LIBRARY_ONLY (2)
#define NEW_MARK_IMAGE_ONLY (3)
#define MATCHED_REFINE (4)
#define MATCHED_REFINE_LIBRARY_ONLY (5)
#define MATCHED_REFINE_IMAGE_ONLY (6)
#define MATCHED_COPY (7)
#define NON_MARK_DATA (8)
#define REQUIRED_DICT_OR_RESET (9)
#define PRESERVED_COMMENT (10)
#define END_OF_DATA (11)
// STATIC DATA MEMBERS
static const int BIGPOSITIVE = 262142;
static const int BIGNEGATIVE = -262143;
static const int CELLCHUNK = 20000;
static const int CELLEXTRA = 500;
// CONSTRUCTOR
JB2Dict::JB2Codec::Decode::Decode(void)
: JB2Dict::JB2Codec(0), cbfunc(0), cbarg(0) {}
void
JB2Dict::JB2Codec::Decode::init(const GP<ByteStream> &gbs)
{
gzp=ZPCodec::create(gbs,false,true);
}
JB2Dict::JB2Codec::JB2Codec(const bool xencoding)
: encoding(xencoding),
cur_ncell(0),
gbitcells(bitcells,CELLCHUNK+CELLEXTRA),
gleftcell(leftcell,CELLCHUNK+CELLEXTRA),
grightcell(rightcell,CELLCHUNK+CELLEXTRA),
refinementp(false),
gotstartrecordp(0),
dist_comment_byte(0),
dist_comment_length(0),
dist_record_type(0),
dist_match_index(0),
dist_refinement_flag(0),
abs_loc_x(0),
abs_loc_y(0),
abs_size_x(0),
abs_size_y(0),
image_size_dist(0),
inherited_shape_count_dist(0),
offset_type_dist(0),
rel_loc_x_current(0),
rel_loc_x_last(0),
rel_loc_y_current(0),
rel_loc_y_last(0),
rel_size_x(0),
rel_size_y(0)
{
memset(bitdist, 0, sizeof(bitdist));
memset(cbitdist, 0, sizeof(cbitdist));
// Initialize numcoder
bitcells[0] = 0; // dummy cell
leftcell[0] = rightcell[0] = 0;
cur_ncell = 1;
}
JB2Dict::JB2Codec::~JB2Codec() {}
void
JB2Dict::JB2Codec::reset_numcoder()
{
dist_comment_byte = 0;
dist_comment_length = 0;
dist_record_type = 0;
dist_match_index = 0;
abs_loc_x = 0;
abs_loc_y = 0;
abs_size_x = 0;
abs_size_y = 0;
image_size_dist = 0;
inherited_shape_count_dist = 0;
rel_loc_x_current = 0;
rel_loc_x_last = 0;
rel_loc_y_current = 0;
rel_loc_y_last = 0;
rel_size_x = 0;
rel_size_y = 0;
gbitcells.clear();
gleftcell.clear();
grightcell.clear();
cur_ncell = 1;
}
void
JB2Dict::JB2Codec::Decode::set_dict_callback(JB2DecoderCallback *cb, void *arg)
{
cbfunc = cb;
cbarg = arg;
}
// CODE NUMBERS
inline bool
JB2Dict::JB2Codec::Decode::CodeBit(const bool, BitContext &ctx)
{
return gzp->decoder(ctx)?true:false;
}
int
JB2Dict::JB2Codec::Decode::CodeNum(int low, int high, NumContext &ctx)
{
return JB2Codec::CodeNum(low,high,&ctx,0);
}
int
JB2Dict::JB2Codec::CodeNum(int low, int high, NumContext *pctx, int v)
{
bool negative=false;
int cutoff;
// Check
if (!pctx || ((int)*pctx >= cur_ncell))
G_THROW( ERR_MSG("JB2Image.bad_numcontext") );
// Start all phases
cutoff = 0;
for(int phase=1,range=0xffffffff;range != 1;)
{
if (! *pctx)
{
const int max_ncell=gbitcells;
if (cur_ncell >= max_ncell)
{
const int nmax_ncell = max_ncell+CELLCHUNK;
gbitcells.resize(nmax_ncell);
gleftcell.resize(nmax_ncell);
grightcell.resize(nmax_ncell);
}
*pctx = cur_ncell ++;
bitcells[*pctx] = 0;
leftcell[*pctx] = rightcell[*pctx] = 0;
}
// encode
const bool decision = encoding
? ((low < cutoff && high >= cutoff)
? CodeBit((v>=cutoff),bitcells[*pctx])
: (v >= cutoff))
: ((low>=cutoff)||((high>=cutoff)&&CodeBit(false,bitcells[*pctx])));
// context for new bit
pctx = decision?(&rightcell[*pctx]):(&leftcell[*pctx]);
// phase dependent part
switch (phase)
{
case 1:
negative = !decision;
if (negative)
{
if (encoding)
v = - v - 1;
const int temp = - low - 1;
low = - high - 1;
high = temp;
}
phase = 2; cutoff = 1;
break;
case 2:
if (!decision)
{
phase = 3;
range = (cutoff + 1) / 2;
if (range == 1)
cutoff = 0;
else
cutoff -= range / 2;
}
else
{
cutoff += cutoff + 1;
}
break;
case 3:
range /= 2;
if (range != 1)
{
if (!decision)
cutoff -= range / 2;
else
cutoff += range / 2;
}
else if (!decision)
{
cutoff --;
}
break;
}
}
return (negative)?(- cutoff - 1):cutoff;
}
// CODE COMMENTS
void
JB2Dict::JB2Codec::Decode::code_comment(GUTF8String &comment)
{
int size=CodeNum(0, BIGPOSITIVE, dist_comment_length);
comment.empty();
char *combuf = comment.getbuf(size);
for (int i=0; i<size; i++)
{
combuf[i]=CodeNum(0, 255, dist_comment_byte);
}
comment.getbuf();
}
// LIBRARY
void
JB2Dict::JB2Codec::init_library(JB2Dict &jim)
{
int nshape = jim.get_inherited_shape_count();
shape2lib.resize(0,nshape-1);
lib2shape.resize(0,nshape-1);
libinfo.resize(0,nshape-1);
for (int i=0; i<nshape; i++)
{
shape2lib[i] = i;
lib2shape[i] = i;
jim.get_bounding_box(i, libinfo[i]);
}
}
int
JB2Dict::JB2Codec::add_library(const int shapeno, JB2Shape &jshp)
{
const int libno = lib2shape.hbound() + 1;
lib2shape.touch(libno);
lib2shape[libno] = shapeno;
shape2lib.touch(shapeno);
shape2lib[shapeno] = libno;
libinfo.touch(libno);
libinfo[libno].compute_bounding_box(*(jshp.bits));
return libno;
}
// CODE SIMPLE VALUES
inline void
JB2Dict::JB2Codec::Decode::code_record_type(int &rectype)
{
rectype=CodeNum( START_OF_DATA, END_OF_DATA, dist_record_type);
}
int
JB2Dict::JB2Codec::Decode::code_match_index(int &index, JB2Dict &)
{
int match=CodeNum(0, lib2shape.hbound(), dist_match_index);
index = lib2shape[match];
return match;
}
// HANDLE SHORT LIST
int
JB2Dict::JB2Codec::update_short_list(const int v)
{
if (++ short_list_pos == 3)
short_list_pos = 0;
int * const s = short_list;
s[short_list_pos] = v;
return (s[0] >= s[1])
?((s[0] > s[2])?((s[1] >= s[2])?s[1]:s[2]):s[0])
:((s[0] < s[2])?((s[1] >= s[2])?s[2]:s[1]):s[0]);
}
// CODE PAIRS
void
JB2Dict::JB2Codec::Decode::code_inherited_shape_count(JB2Dict &jim)
{
int size=CodeNum(0, BIGPOSITIVE, inherited_shape_count_dist);
{
GP<JB2Dict> dict = jim.get_inherited_dict();
if (!dict && size>0)
{
// Call callback function to obtain dictionary
if (cbfunc)
dict = (*cbfunc)(cbarg);
if (dict)
jim.set_inherited_dict(dict);
}
if (!dict && size>0)
G_THROW( ERR_MSG("JB2Image.need_dict") );
if (dict && size!=dict->get_shape_count())
G_THROW( ERR_MSG("JB2Image.bad_dict") );
}
}
void
JB2Dict::JB2Codec::Decode::code_image_size(JB2Dict &jim)
{
int w=CodeNum(0, BIGPOSITIVE, image_size_dist);
int h=CodeNum(0, BIGPOSITIVE, image_size_dist);
if (w || h)
G_THROW( ERR_MSG("JB2Image.bad_dict2") );
JB2Codec::code_image_size(jim);
}
void
JB2Dict::JB2Codec::code_image_size(JB2Dict &)
{
last_left = 1;
last_row_left = 0;
last_row_bottom = 0;
last_right = 0;
fill_short_list(last_row_bottom);
gotstartrecordp = 1;
}
void
JB2Dict::JB2Codec::Decode::code_image_size(JB2Image &jim)
{
image_columns=CodeNum(0, BIGPOSITIVE, image_size_dist);
image_rows=CodeNum(0, BIGPOSITIVE, image_size_dist);
if (!image_columns || !image_rows)
G_THROW( ERR_MSG("JB2Image.zero_dim") );
jim.set_dimension(image_columns, image_rows);
JB2Codec::code_image_size(jim);
}
void
JB2Dict::JB2Codec::code_image_size(JB2Image &)
{
last_left = 1 + image_columns;
last_row_left = 0;
last_row_bottom = image_rows;
last_right = 0;
fill_short_list(last_row_bottom);
gotstartrecordp = 1;
}
inline int
JB2Dict::JB2Codec::Decode::get_diff(int,NumContext &rel_loc)
{
return CodeNum(BIGNEGATIVE, BIGPOSITIVE, rel_loc);
}
void
JB2Dict::JB2Codec::code_relative_location(JB2Blit *jblt, int rows, int columns)
{
// Check start record
if (!gotstartrecordp)
G_THROW( ERR_MSG("JB2Image.no_start") );
// Find location
int bottom=0, left=0, top=0, right=0;
int x_diff, y_diff;
if (encoding)
{
left = jblt->left + 1;
bottom = jblt->bottom + 1;
right = left + columns - 1;
top = bottom + rows - 1;
}
// Code offset type
int new_row=CodeBit((left<last_left), offset_type_dist);
if (new_row)
{
// Begin a new row
x_diff=get_diff(left-last_row_left,rel_loc_x_last);
y_diff=get_diff(top-last_row_bottom,rel_loc_y_last);
if (!encoding)
{
left = last_row_left + x_diff;
top = last_row_bottom + y_diff;
right = left + columns - 1;
bottom = top - rows + 1;
}
last_left = last_row_left = left;
last_right = right;
last_bottom = last_row_bottom = bottom;
fill_short_list(bottom);
}
else
{
// Same row
x_diff=get_diff(left-last_right,rel_loc_x_current);
y_diff=get_diff(bottom-last_bottom,rel_loc_y_current);
if (!encoding)
{
left = last_right + x_diff;
bottom = last_bottom + y_diff;
right = left + columns - 1;
top = bottom + rows - 1;
}
last_left = left;
last_right = right;
last_bottom = update_short_list(bottom);
}
// Store in blit record
if (!encoding)
{
jblt->bottom = bottom - 1;
jblt->left = left - 1;
}
}
void
JB2Dict::JB2Codec::Decode::code_absolute_location(JB2Blit *jblt, int rows, int columns)
{
// Check start record
if (!gotstartrecordp)
G_THROW( ERR_MSG("JB2Image.no_start") );
int left=CodeNum(1, image_columns, abs_loc_x);
int top=CodeNum(1, image_rows, abs_loc_y);
jblt->bottom = top - rows + 1 - 1;
jblt->left = left - 1;
}
void
JB2Dict::JB2Codec::Decode::code_absolute_mark_size(GBitmap &bm, int border)
{
int xsize=CodeNum(0, BIGPOSITIVE, abs_size_x);
int ysize=CodeNum(0, BIGPOSITIVE, abs_size_y);
if ((xsize!=(unsigned short)xsize) || (ysize!=(unsigned short)ysize))
G_THROW( ERR_MSG("JB2Image.bad_number") );
bm.init(ysize, xsize, border);
}
void
JB2Dict::JB2Codec::Decode::code_relative_mark_size(GBitmap &bm, int cw, int ch, int border)
{
int xdiff=CodeNum(BIGNEGATIVE, BIGPOSITIVE, rel_size_x);
int ydiff=CodeNum(BIGNEGATIVE, BIGPOSITIVE, rel_size_y);
int xsize = cw + xdiff;
int ysize = ch + ydiff;
if ((xsize!=(unsigned short)xsize) || (ysize!=(unsigned short)ysize))
G_THROW( ERR_MSG("JB2Image.bad_number") );
bm.init(ysize, xsize, border);
}
// CODE BITMAP DIRECTLY
void
JB2Dict::JB2Codec::code_bitmap_directly (GBitmap &bm)
{
// Make sure bitmap will not be disturbed
GMonitorLock lock(bm.monitor());
// ensure borders are adequate
bm.minborder(3);
// initialize row pointers
int dy = bm.rows() - 1;
code_bitmap_directly(bm,bm.columns(),dy,bm[dy+2],bm[dy+1],bm[dy]);
}
void
JB2Dict::JB2Codec::Decode::code_bitmap_directly(
GBitmap &bm,const int dw, int dy,
unsigned char *up2, unsigned char *up1, unsigned char *up0 )
{
ZPCodec &zp=*gzp;
// iterate on rows (decoding)
while (dy >= 0)
{
int context=get_direct_context(up2, up1, up0, 0);
for(int dx=0;dx < dw;)
{
int n = zp.decoder(bitdist[context]);
up0[dx++] = n;
context=shift_direct_context(context, n, up2, up1, up0, dx);
}
// next row
dy -= 1;
up2 = up1;
up1 = up0;
up0 = bm[dy];
}
#ifndef NDEBUG
bm.check_border();
#endif
}
// CODE BITMAP BY CROSS CODING
void
JB2Dict::JB2Codec::code_bitmap_by_cross_coding (GBitmap &bm, GP<GBitmap> &cbm, const int libno)
{
// Make sure bitmaps will not be disturbed
GP<GBitmap> copycbm=GBitmap::create();
if (cbm->monitor())
{
// Perform a copy when the bitmap is explicitely shared
GMonitorLock lock2(cbm->monitor());
copycbm->init(*cbm);
cbm = copycbm;
}
GMonitorLock lock1(bm.monitor());
// Center bitmaps
const int cw = cbm->columns();
const int dw = bm.columns();
const int dh = bm.rows();
const LibRect &l = libinfo[libno];
const int xd2c = (dw/2 - dw + 1) - ((l.right - l.left + 1)/2 - l.right);
const int yd2c = (dh/2 - dh + 1) - ((l.top - l.bottom + 1)/2 - l.top);
// Ensure borders are adequate
bm.minborder(2);
cbm->minborder(2-xd2c);
cbm->minborder(2+dw+xd2c-cw);
// Initialize row pointers
const int dy = dh - 1;
const int cy = dy + yd2c;
#ifndef NDEBUG
bm.check_border();
cbm->check_border();
#endif
code_bitmap_by_cross_coding (bm,*cbm, xd2c, dw, dy, cy, bm[dy+1], bm[dy],
(*cbm)[cy+1] + xd2c, (*cbm)[cy ] + xd2c, (*cbm)[cy-1] + xd2c);
}
void
JB2Dict::JB2Codec::Decode::code_bitmap_by_cross_coding (GBitmap &bm, GBitmap &cbm,
const int xd2c, const int dw, int dy, int cy,
unsigned char *up1, unsigned char *up0, unsigned char *xup1,
unsigned char *xup0, unsigned char *xdn1 )
{
ZPCodec &zp=*gzp;
// iterate on rows (decoding)
while (dy >= 0)
{
int context=get_cross_context(
up1, up0, xup1, xup0, xdn1, 0);
for(int dx=0;dx < dw;)
{
const int n = zp.decoder(cbitdist[context]);
up0[dx++] = n;
context=shift_cross_context(context, n,
up1, up0, xup1, xup0, xdn1, dx);
}
// next row
up1 = up0;
up0 = bm[--dy];
xup1 = xup0;
xup0 = xdn1;
xdn1 = cbm[(--cy)-1] + xd2c;
#ifndef NDEBUG
bm.check_border();
#endif
}
}
// CODE JB2DICT RECORD
void
JB2Dict::JB2Codec::code_record(
int &rectype, const GP<JB2Dict> &gjim, JB2Shape *xjshp)
{
GP<GBitmap> cbm;
GP<GBitmap> bm;
int shapeno = -1;
// Code record type
code_record_type(rectype);
// Pre-coding actions
switch(rectype)
{
case NEW_MARK_LIBRARY_ONLY:
case MATCHED_REFINE_LIBRARY_ONLY:
{
if(!xjshp)
{
G_THROW( ERR_MSG("JB2Image.bad_number") );
}
JB2Shape &jshp=*xjshp;
if (!encoding)
{
jshp.bits = GBitmap::create();
jshp.parent = -1;
}
bm = jshp.bits;
break;
}
}
// Coding actions
switch (rectype)
{
case START_OF_DATA:
{
if(!gjim)
{
G_THROW( ERR_MSG("JB2Image.bad_number") );
}
JB2Dict &jim=*gjim;
code_image_size (jim);
code_eventual_lossless_refinement ();
if (! encoding)
init_library(jim);
break;
}
case NEW_MARK_LIBRARY_ONLY:
{
code_absolute_mark_size (*bm, 4);
code_bitmap_directly (*bm);
break;
}
case MATCHED_REFINE_LIBRARY_ONLY:
{
if(!xjshp||!gjim)
{
G_THROW( ERR_MSG("JB2Image.bad_number") );
}
JB2Dict &jim=*gjim;
JB2Shape &jshp=*xjshp;
int match = code_match_index (jshp.parent, jim);
cbm = jim.get_shape(jshp.parent).bits;
LibRect &l = libinfo[match];
code_relative_mark_size (*bm, l.right-l.left+1, l.top-l.bottom+1, 4);
code_bitmap_by_cross_coding (*bm, cbm, jshp.parent);
break;
}
case PRESERVED_COMMENT:
{
if(!gjim)
{
G_THROW( ERR_MSG("JB2Image.bad_number") );
}
JB2Dict &jim=*gjim;
code_comment(jim.comment);
break;
}
case REQUIRED_DICT_OR_RESET:
{
if (! gotstartrecordp)
{
// Indicates need for a shape dictionary
if(!gjim)
{
G_THROW( ERR_MSG("JB2Image.bad_number") );
}
code_inherited_shape_count(*gjim);
}else
// Reset all numerical contexts to zero
reset_numcoder();
break;
}
case END_OF_DATA:
{
break;
}
default:
{
G_THROW( ERR_MSG("JB2Image.bad_type") );
}
}
// Post-coding action
if (!encoding)
{
// add shape to dictionary
switch(rectype)
{
case NEW_MARK_LIBRARY_ONLY:
case MATCHED_REFINE_LIBRARY_ONLY:
{
if(!xjshp||!gjim)
{
G_THROW( ERR_MSG("JB2Image.bad_number") );
}
JB2Shape &jshp=*xjshp;
shapeno = gjim->add_shape(jshp);
add_library(shapeno, jshp);
break;
}
}
// make sure everything is compacted
// decompaction will occur automatically when needed
if (bm)
bm->compress();
}
}
// CODE JB2DICT
void
JB2Dict::JB2Codec::Decode::code(const GP<JB2Dict> &gjim)
{
if(!gjim)
{
G_THROW( ERR_MSG("JB2Image.bad_number") );
}
JB2Dict &jim=*gjim;
// -------------------------
// THIS IS THE DECODING PART
// -------------------------
int rectype;
JB2Shape tmpshape;
do {
code_record(rectype, gjim, &tmpshape);
} while(rectype != END_OF_DATA);
if (!gotstartrecordp)
G_THROW( ERR_MSG("JB2Image.no_start") );
// cache bounding boxes
int nshapes = jim.get_shape_count();
int ishapes = jim.get_inherited_shape_count();
jim.boxes.resize(0, nshapes-ishapes-1);
for (int i = ishapes; i < nshapes; i++)
jim.boxes[i-ishapes] = libinfo[i];
// compress
jim.compress();
}
// CODE JB2IMAGE RECORD
void
JB2Dict::JB2Codec::code_record(
int &rectype, const GP<JB2Image> &gjim, JB2Shape *xjshp, JB2Blit *jblt)
{
GP<GBitmap> bm;
GP<GBitmap> cbm;
int shapeno = -1;
int match;
// Code record type
code_record_type(rectype);
// Pre-coding actions
switch(rectype)
{
case NEW_MARK:
case NEW_MARK_LIBRARY_ONLY:
case NEW_MARK_IMAGE_ONLY:
case MATCHED_REFINE:
case MATCHED_REFINE_LIBRARY_ONLY:
case MATCHED_REFINE_IMAGE_ONLY:
case NON_MARK_DATA:
{
if(!xjshp)
{
G_THROW( ERR_MSG("JB2Image.bad_number") );
}
JB2Shape &jshp=*xjshp;
if (!encoding)
{
jshp.bits = GBitmap::create();
jshp.parent = -1;
if (rectype == NON_MARK_DATA)
jshp.parent = -2;
}
bm = jshp.bits;
break;
}
}
// Coding actions
switch (rectype)
{
case START_OF_DATA:
{
if(!gjim)
{
G_THROW( ERR_MSG("JB2Image.bad_number") );
}
JB2Image &jim=*gjim;
code_image_size (jim);
code_eventual_lossless_refinement ();
if (! encoding)
init_library(jim);
break;
}
case NEW_MARK:
{
code_absolute_mark_size (*bm, 4);
code_bitmap_directly (*bm);
code_relative_location (jblt, bm->rows(), bm->columns() );
break;
}
case NEW_MARK_LIBRARY_ONLY:
{
code_absolute_mark_size (*bm, 4);
code_bitmap_directly (*bm);
break;
}
case NEW_MARK_IMAGE_ONLY:
{
code_absolute_mark_size (*bm, 3);
code_bitmap_directly (*bm);
code_relative_location (jblt, bm->rows(), bm->columns() );
break;
}
case MATCHED_REFINE:
{
if(!xjshp || !gjim)
{
G_THROW( ERR_MSG("JB2Image.bad_number") );
}
JB2Shape &jshp=*xjshp;
JB2Image &jim=*gjim;
match = code_match_index (jshp.parent, jim);
cbm = jim.get_shape(jshp.parent).bits;
LibRect &l = libinfo[match];
code_relative_mark_size (*bm, l.right-l.left+1, l.top-l.bottom+1, 4);
code_bitmap_by_cross_coding (*bm, cbm, match);
code_relative_location (jblt, bm->rows(), bm->columns() );
break;
}
case MATCHED_REFINE_LIBRARY_ONLY:
{
if(!xjshp||!gjim)
{
G_THROW( ERR_MSG("JB2Image.bad_number") );
}
JB2Image &jim=*gjim;
JB2Shape &jshp=*xjshp;
match = code_match_index (jshp.parent, jim);
cbm = jim.get_shape(jshp.parent).bits;
LibRect &l = libinfo[match];
code_relative_mark_size (*bm, l.right-l.left+1, l.top-l.bottom+1, 4);
break;
}
case MATCHED_REFINE_IMAGE_ONLY:
{
if(!xjshp||!gjim)
{
G_THROW( ERR_MSG("JB2Image.bad_number") );
}
JB2Image &jim=*gjim;
JB2Shape &jshp=*xjshp;
match = code_match_index (jshp.parent, jim);
cbm = jim.get_shape(jshp.parent).bits;
LibRect &l = libinfo[match];
code_relative_mark_size (*bm, l.right-l.left+1, l.top-l.bottom+1, 4);
code_bitmap_by_cross_coding (*bm, cbm, match);
code_relative_location (jblt, bm->rows(), bm->columns() );
break;
}
case MATCHED_COPY:
{
int temp;
if (encoding) temp = jblt->shapeno;
if(!gjim)
{
G_THROW( ERR_MSG("JB2Image.bad_number") );
}
JB2Image &jim=*gjim;
match = code_match_index (temp, jim);
if (!encoding) jblt->shapeno = temp;
bm = jim.get_shape(jblt->shapeno).bits;
LibRect &l = libinfo[match];
jblt->left += l.left;
jblt->bottom += l.bottom;
if (jim.reproduce_old_bug)
code_relative_location (jblt, bm->rows(), bm->columns() );
else
code_relative_location (jblt, l.top-l.bottom+1, l.right-l.left+1 );
jblt->left -= l.left;
jblt->bottom -= l.bottom;
break;
}
case NON_MARK_DATA:
{
code_absolute_mark_size (*bm, 3);
code_bitmap_directly (*bm);
code_absolute_location (jblt, bm->rows(), bm->columns() );
break;
}
case PRESERVED_COMMENT:
{
if(!gjim)
{
G_THROW( ERR_MSG("JB2Image.bad_number") );
}
JB2Image &jim=*gjim;
code_comment(jim.comment);
break;
}
case REQUIRED_DICT_OR_RESET:
{
if(!gjim)
{
G_THROW( ERR_MSG("JB2Image.bad_number") );
}
JB2Image &jim=*gjim;
if (! gotstartrecordp)
// Indicates need for a shape dictionary
code_inherited_shape_count(jim);
else
// Reset all numerical contexts to zero
reset_numcoder();
break;
}
case END_OF_DATA:
{
break;
}
default:
{
G_THROW( ERR_MSG("JB2Image.unknown_type") );
}
}
// Post-coding action
if (!encoding)
{
// add shape to image
switch(rectype)
{
case NEW_MARK:
case NEW_MARK_LIBRARY_ONLY:
case NEW_MARK_IMAGE_ONLY:
case MATCHED_REFINE:
case MATCHED_REFINE_LIBRARY_ONLY:
case MATCHED_REFINE_IMAGE_ONLY:
case NON_MARK_DATA:
{
if(!xjshp||!gjim)
{
G_THROW( ERR_MSG("JB2Image.bad_number") );
}
JB2Shape &jshp=*xjshp;
shapeno = gjim->add_shape(jshp);
shape2lib.touch(shapeno);
shape2lib[shapeno] = -1;
break;
}
}
// add shape to library
switch(rectype)
{
case NEW_MARK:
case NEW_MARK_LIBRARY_ONLY:
case MATCHED_REFINE:
case MATCHED_REFINE_LIBRARY_ONLY:
if(!xjshp)
{
G_THROW( ERR_MSG("JB2Image.bad_number") );
}
add_library(shapeno, *xjshp);
break;
}
// make sure everything is compacted
// decompaction will occur automatically on cross-coding bitmaps
if (bm)
bm->compress();
// add blit to image
switch (rectype)
{
case NEW_MARK:
case NEW_MARK_IMAGE_ONLY:
case MATCHED_REFINE:
case MATCHED_REFINE_IMAGE_ONLY:
case NON_MARK_DATA:
jblt->shapeno = shapeno;
case MATCHED_COPY:
if(!gjim)
{
G_THROW( ERR_MSG("JB2Image.bad_number") );
}
gjim->add_blit(* jblt);
break;
}
}
}
// CODE JB2IMAGE
void
JB2Dict::JB2Codec::Decode::code(const GP<JB2Image> &gjim)
{
if(!gjim)
{
G_THROW( ERR_MSG("JB2Image.bad_number") );
}
JB2Image &jim=*gjim;
// -------------------------
// THIS IS THE DECODING PART
// -------------------------
int rectype;
JB2Blit tmpblit;
JB2Shape tmpshape;
do
{
code_record(rectype, gjim, &tmpshape, &tmpblit);
}
while(rectype!=END_OF_DATA);
if (!gotstartrecordp)
G_THROW( ERR_MSG("JB2Image.no_start") );
jim.compress();
}
////////////////////////////////////////
//// HELPERS
////////////////////////////////////////
void
JB2Dict::LibRect::compute_bounding_box(const GBitmap &bm)
{
// Avoid trouble
GMonitorLock lock(bm.monitor());
// Get size
const int w = bm.columns();
const int h = bm.rows();
const int s = bm.rowsize();
// Right border
for(right=w-1;right >= 0;--right)
{
unsigned char const *p = bm[0] + right;
unsigned char const * const pe = p+(s*h);
for (;(p<pe)&&(!*p);p+=s)
continue;
if (p<pe)
break;
}
// Top border
for(top=h-1;top >= 0;--top)
{
unsigned char const *p = bm[top];
unsigned char const * const pe = p+w;
for (;(p<pe)&&(!*p); ++p)
continue;
if (p<pe)
break;
}
// Left border
for (left=0;left <= right;++left)
{
unsigned char const *p = bm[0] + left;
unsigned char const * const pe=p+(s*h);
for (;(p<pe)&&(!*p);p+=s)
continue;
if (p<pe)
break;
}
// Bottom border
for(bottom=0;bottom <= top;++bottom)
{
unsigned char const *p = bm[bottom];
unsigned char const * const pe = p+w;
for (;(p<pe)&&(!*p); ++p)
continue;
if (p<pe)
break;
}
}
void
JB2Dict::get_bounding_box(int shapeno, LibRect &dest)
{
if (shapeno < inherited_shapes && inherited_dict)
{
inherited_dict->get_bounding_box(shapeno, dest);
}
else if (shapeno >= inherited_shapes &&
shapeno < inherited_shapes + boxes.size())
{
dest = boxes[shapeno - inherited_shapes];
}
else
{
JB2Shape &jshp = get_shape(shapeno);
dest.compute_bounding_box(*(jshp.bits));
}
}
GP<JB2Dict>
JB2Dict::create(void)
{
return new JB2Dict();
}
#ifdef HAVE_NAMESPACES
}
# ifndef NOT_USING_DJVU_NAMESPACE
using namespace DJVU;
# endif
#endif
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