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#include "imgtypes.h"
#include "garminimg.h"
#include "decoder.h"
#include "decode_img.h"
static class GarminImg *img;
static class ImgFile *ifile;
static class ImgRGN *rgn;
static class ImgNET *net;
static class Decoder *dec;
void decode_rgn_subdiv (uword_t i, int *level);
void decode_tre_points (off_t oend, bool indexed);
void decode_tre_poly (off_t oend, bool line);
void decode_rgn_header (class Decoder *dec_in, class ImgRGN *rgn_in)
{
off_t soffset, hoffset;
rgn= rgn_in;
dec= dec_in;
img= dec->img;
ifile= rgn->ifile;
net= (class ImgNET *) ifile->subfile_find("NET");
soffset= rgn->offset();
hoffset= rgn->h_offset();
img->seek(hoffset);
dec->set_outfile("RGN", "header");
dec->banner("RGN: Header");
decode_common_header(dec, rgn);
dec->print("Data at offset 0x%08x",
rgn->data_info.offset= img->get_udword()+soffset);
dec->print("Data length %ld bytes",
rgn->data_info.length= img->get_udword());
}
void decode_rgn_body ()
{
int level;
uword_t n= ifile->nsubdivisions();
uword_t i;
level= -1;
for (i= 1; i<= n; ++i) decode_rgn_subdiv(i, &level);
}
void decode_rgn_subdiv (uword_t i, int *level)
{
map_subdivision_t subdiv;
off_t soffset, eoffset;
string fname="level.";
string banner;
short nptrs;
char snum[6], lnum[2];
off_t opnt, oidx, opline, opgon, olast, oend;
ifile->subdivision_get(i, &subdiv);
if ( subdiv.elements == 0 ) return;
if ( subdiv.rgn_start == subdiv.rgn_end ) return;
soffset= rgn->data_info.offset+subdiv.rgn_start;
eoffset= rgn->data_info.offset+subdiv.rgn_end;
img->seek(soffset);
if ( subdiv.level != *level ) {
*level= subdiv.level;
sprintf(lnum, "%02u", *level);
fname+= lnum;
dec->set_outfile("RGN", fname);
}
sprintf(snum, "%u", i);
banner= "RGN: Subdivision ";
banner+= snum;
dec->banner(banner);
opnt= oidx= opline= opgon= 0;
nptrs= SUB_N_HAS(subdiv.elements)-1;
olast= soffset + 2*nptrs;
if ( SUB_HAS_POINT(subdiv.elements) ) {
opnt= olast;
}
if ( SUB_HAS_IDXPNT(subdiv.elements) ) {
if ( opnt ) {
oidx= img->get_uword()+soffset;
dec->print("Indexed points at 0x%08x", oidx);
} else oidx= olast;
}
if ( SUB_HAS_POLYLINE(subdiv.elements) ) {
if ( opnt || oidx ) {
opline= img->get_uword()+soffset;
dec->print("Polylines at 0x%08x", opline);
} else opline= olast;
}
if ( SUB_HAS_POLYGON(subdiv.elements) ) {
if ( opnt || oidx || opline ) {
opgon= img->get_uword()+soffset;
dec->print("Polygons at 0x%08x", opgon);
} else opgon= olast;
}
// Now decode our elements in order
if ( SUB_HAS_POINT(subdiv.elements) ) {
oend= oidx ? oidx : opline ? opline : opgon ? opgon :
eoffset;
decode_tre_points(oend, false);
}
if ( SUB_HAS_IDXPNT(subdiv.elements) ) {
oend= opline ? opline : opgon ? opgon : eoffset;
decode_tre_points(oend, true);
}
if ( SUB_HAS_POLYLINE(subdiv.elements) ) {
oend= opgon ? opgon : eoffset;
decode_tre_poly(oend, true);
}
if ( SUB_HAS_POLYGON(subdiv.elements) ) {
decode_tre_poly(eoffset, false);
}
}
void decode_tre_points (off_t oend, bool indexed)
{
uword_t idx= 1;
dec->comment(NULL);
if (indexed) dec->comment("Indexed Points");
else dec->comment("Points");
dec->comment(NULL);
while ( img->tell() < oend ) {
byte_t type, subtype;
bool has_subtype, is_poi;
udword_t point_info, lbloffset;
word_t dx, dy;
string sinfo;
dec->comment("Point #%u", idx++);
type= img->get_byte();
dec->print("Primary type %u", type);
point_info= img->get_uint24();
has_subtype= (point_info & 0x800000);
is_poi= (point_info & 0x400000);
lbloffset= (point_info & 0x3FFFFF);
if ( is_poi ) {
dec->print("POI offset 0x%06x in LBL", lbloffset);
sinfo+= "is POI";
} else
dec->print("label offset 0x%06x in LBL", lbloffset);
if ( has_subtype ) {
if ( is_poi ) sinfo+= ", has subtype";
else sinfo= "has subtype";
}
if ( sinfo.size() ) dec->comment("%s", sinfo.c_str());
dx= img->get_word();
dec->print("long delta %d units (unshifted)", dx);
dy= img->get_word();
dec->print("lat delta %d units (unshifted)", dy);
if ( has_subtype ) {
subtype= img->get_byte();
dec->print("Subtype %u", subtype);
} else subtype= 0;
dec->comment("%s", img->elem_point_name(type, subtype).c_str());
if ( is_poi ) dec->comment("%s",
ifile->poi_get_name(lbloffset).c_str());
else dec->comment("%s", ifile->label_get(lbloffset).c_str());
dec->comment(NULL);
}
}
void decode_tre_poly (off_t oend, bool line)
{
int n= 1;
dec->comment(NULL);
if (line) dec->comment("Polylines");
else dec->comment("Polygons");
dec->comment(NULL);
while ( img->tell() < oend ) {
byte_t type, bstream_info;
word_t dx, dy;
int bx, by, bs;
uword_t bstream_len;
bool extra_bit, two_byte_len, direction, lbl_in_net;
udword_t lbloffset, lbl_info;
string bitstream;
if ( line ) dec->comment("Line %u", n++);
type= img->get_byte();
two_byte_len= (type & 0x80);
if ( line ) {
direction= (type & 0x40);
type&= 0x3F;
dec->print("Type %u, %s", type,
img->elem_polyline_name(type).c_str());
if ( direction ) dec->comment("One-way road");
if ( two_byte_len ) dec->comment("2 byte length");
} else {
dec->print("Type %u, %s", type,
img->elem_polygon_name(type).c_str());
}
lbl_info= img->get_uint24();
lbloffset= lbl_info & 0x3FFFFF;
extra_bit= lbl_info & 0x400000;
if ( line ) {
lbl_in_net= lbl_info & 0x800000;
if ( lbl_in_net ) {
off_t netoff= net->roads_info.offset+
net->omult1*lbloffset;
ifile->offset_add(netoff, NET_ROAD_REC);
dec->print("Label at NET offset 0x%06x",
net->omult1*lbloffset);
} else {
dec->print("Label at LBL offset 0x%06x",
lbloffset);
dec->comment("%s",
ifile->label_get(lbloffset).c_str());
}
} else {
dec->print("Label at LBL offset 0x%06x", lbloffset);
dec->comment("%s",
ifile->label_get(lbloffset).c_str());
}
if ( extra_bit ) dec->comment("extra bit in bitstream");
dx= img->get_word();
dec->print("pt#1 long delta %d units (unshifted)", dx);
dy= img->get_word();
dec->print("pt#1 lat delta %d units (unshifted)", dy);
if ( two_byte_len ) {
bstream_len= img->get_uword();
} else {
bstream_len= img->get_byte();
}
dec->print("Bitsteam %u bytes", bstream_len);
bstream_info= img->get_byte();
dec->print("Base %u/%u bits per long/lat",
bstream_info&0xF, (bstream_info&0xF0)>>4);
bitstream= img->get_string(bstream_len);
rgn->bits_per_coord(bstream_info, bitstream[0],
extra_bit, &bx, &by, &bs);
dec->print("%u/%u bits per long/lat, %u setup", bx, by, bs,
bitstream.c_str());
dec->comment("%u point(s)", (8*bstream_len-bs)/(bx+by));
dec->comment(NULL);
}
}