static void do_psf1_header(deark *c, lctx *d)
{
de_int64 pos = 0;
de_dbg(c, "PFXv1 header at %d\n", (int)pos);
de_dbg_indent(c, 1);
d->headersize = 4;
d->mode = de_getbyte(2);
de_dbg(c, "mode: 0x%02x\n", (unsigned int)d->mode);
de_dbg_indent(c, 1);
d->num_glyphs = (d->mode & 0x01) ? 512 : 256;
de_dbg(c, "number of glyphs: %d\n", (int)d->num_glyphs);
d->has_unicode_table = (d->mode & 0x02) ? 1 : 0;
de_dbg(c, "has Unicode table: %s\n", d->has_unicode_table?"yes":"no");
de_dbg_indent(c, -1);
d->bytes_per_glyph = (de_int64)de_getbyte(3);
d->glyph_height = d->bytes_per_glyph;
d->glyph_width = 8;
de_dbg(c, "glyph dimensions: %dx%d\n", (int)d->glyph_width, (int)d->glyph_height);
de_dbg_indent(c, -1);
}
static int do_image(deark *c, lctx *d, struct page_ctx *pg, de_int64 pos1)
{
int retval = 0;
de_dbg(c, "image data at %d\n", (int)pos1);
de_dbg_indent(c, 1);
if(!de_good_image_dimensions(c, pg->width, pg->height)) goto done;
switch(pg->fmt) {
case FMT_PBM_ASCII:
if(!do_image_pbm_ascii(c, d, pg, pos1)) goto done;
break;
case FMT_PGM_ASCII:
case FMT_PPM_ASCII:
if(!do_image_pgm_ppm_ascii(c, d, pg, pos1)) goto done;
break;
case FMT_PBM_BINARY:
if(!do_image_pbm_binary(c, d, pg, pos1)) goto done;
break;
case FMT_PGM_BINARY:
case FMT_PPM_BINARY:
if(!do_image_pgm_ppm_binary(c, d, pg, pos1)) goto done;
break;
default:
de_err(c, "Unsupported PNM format\n");
goto done;
}
retval = 1;
done:
de_dbg_indent(c, -1);
return retval;
}
static void do_dir_entry(deark *c, lctx *d, de_int64 entry_num, de_int64 pos)
{
de_byte filetype_c64s;
de_byte filetype;
filetype_c64s = de_getbyte(pos);
if(filetype_c64s==0) {
de_dbg2(c, "unused entry #%d at %d\n", (int)entry_num, (int)pos);
return;
}
de_dbg(c, "entry #%d at %d\n", (int)entry_num, (int)pos);
de_dbg_indent(c, 1);
filetype = de_getbyte(pos+1);
de_dbg(c, "c64s filetype=%d, filetype=0x%02x\n", (int)filetype_c64s, (int)filetype);
if(filetype==0x00) {
de_err(c, "Unsupported file type (0x%02x)\n", (int)filetype);
}
else {
do_extract_file(c, d, pos, filetype_c64s, filetype);
}
de_dbg_indent(c, -1);
}
static void do_psf2_header(deark *c, lctx *d)
{
de_int64 pos = 0;
de_dbg(c, "PFXv2 header at %d\n", (int)pos);
de_dbg_indent(c, 1);
d->psf2_version = (de_uint32)de_getui32le(pos+4);
de_dbg(c, "PSFv2 version number: %d\n", (int)d->psf2_version);
if(d->psf2_version!=0) {
de_warn(c, "Unknown PSFv2 version number: %d\n", (int)d->psf2_version);
}
d->headersize = de_getui32le(pos+8);
de_dbg(c, "header size: %d\n", (int)d->headersize);
d->flags = (de_uint32)de_getui32le(pos+12);
de_dbg(c, "flags: 0x%08x\n", (unsigned int)d->flags);
de_dbg_indent(c, 1);
d->has_unicode_table = (d->flags & 0x01) ? 1 : 0;
de_dbg(c, "has Unicode table: %s\n", d->has_unicode_table?"yes":"no");
de_dbg_indent(c, -1);
d->num_glyphs = de_getui32le(pos+16);
de_dbg(c, "number of glyphs: %d\n", (int)d->num_glyphs);
d->bytes_per_glyph = de_getui32le(pos+20);
de_dbg(c, "bytes per glyph: %d\n", (int)d->bytes_per_glyph);
d->glyph_height = de_getui32le(pos+24);
d->glyph_width = de_getui32le(pos+28);
de_dbg(c, "glyph dimensions: %dx%d\n", (int)d->glyph_width, (int)d->glyph_height);
de_dbg_indent(c, -1);
}
static void do_read_developer_area(deark *c, lctx *d, i64 pos)
{
i64 num_tags;
i64 i;
i64 tag_id, tag_data_pos, tag_data_size;
de_dbg(c, "developer area at %d", (int)pos);
if(pos > c->infile->len - 2) {
de_warn(c, "Bad developer area offset: %u", (unsigned int)pos);
return;
}
de_dbg_indent(c, 1);
num_tags = de_getu16le(pos);
de_dbg(c, "number of tags: %d", (int)num_tags);
for(i=0; i<num_tags; i++) {
if(i>=200) break;
tag_id = de_getu16le(pos + 2 + 10*i);
tag_data_pos = de_getu32le(pos + 2 + 10*i + 2);
tag_data_size = de_getu32le(pos + 2 + 10*i + 6);
de_dbg(c, "tag #%d: id=%d, pos=%d, size=%d", (int)i, (int)tag_id,
(int)tag_data_pos, (int)tag_data_size);
if(tag_id==20) {
// Tag 20 seems to contain Photoshop resources, though this is unconfirmed.
de_dbg_indent(c, 1);
// TODO: We could retrieve the pixel density settings from the Photoshop data,
// but it's not clear whether they are ever useful.
de_fmtutil_handle_photoshop_rsrc(c, c->infile, tag_data_pos, tag_data_size, 0x0);
de_dbg_indent(c, -1);
}
}
de_dbg_indent(c, -1);
}
static int read_pnm_header(deark *c, lctx *d, struct page_ctx *pg, de_int64 pos1)
{
char tokenbuf[100];
int retval = 0;
de_dbg(c, "header at %d\n", (int)pos1);
de_dbg_indent(c, 1);
de_dbg(c, "format: %s\n", pg->fmt_name);
pg->hdr_parse_pos = pos1+2; // Skip "P?"
if(!read_next_token(c, d, pg, tokenbuf, sizeof(tokenbuf))) goto done;
pg->width = de_atoi64(tokenbuf);
if(!read_next_token(c, d, pg, tokenbuf, sizeof(tokenbuf))) goto done;
pg->height = de_atoi64(tokenbuf);
de_dbg(c, "dimensions: %dx%d\n", (int)pg->width, (int)pg->height);
if(fmt_is_pbm(pg->fmt)) {
pg->maxval = 1;
}
else {
if(!read_next_token(c, d, pg, tokenbuf, sizeof(tokenbuf))) goto done;
pg->maxval = de_atoi64(tokenbuf);
de_dbg(c, "maxval: %d\n", (int)pg->maxval);
if(pg->maxval<1 || pg->maxval>65535) {
de_err(c, "Invalid maxval: %d\n", (int)pg->maxval);
goto done;
}
}
retval = 1;
done:
de_dbg_indent(c, -1);
return retval;
}
static void do_read_embedded_profile(deark *c, lctx *d)
{
de_dbg(c, "embedded profile at %d, size=%d\n", (int)d->profile_offset,
(int)d->profile_size);
de_dbg_indent(c, 1);
dbuf_create_file_from_slice(c->infile, d->profile_offset, d->profile_size, "icc",
NULL, DE_CREATEFLAG_IS_AUX);
de_dbg_indent(c, -1);
}
static void do_psf1_unicode_table(deark *c, lctx *d, struct de_bitmap_font *font)
{
de_int64 cur_idx;
de_int64 pos;
int got_cp;
int found_fffe;
de_int32 n;
de_dbg(c, "Unicode table at %d\n", (int)d->unicode_table_pos);
de_dbg_indent(c, 1);
pos = d->unicode_table_pos;
cur_idx = 0;
got_cp = 0; // Have we set the codepoint for glyph[cur_idx]?
found_fffe = 0;
while(1) {
if(cur_idx >= d->num_glyphs) break;
if(pos+1 >= c->infile->len) break;
n = (de_int32)de_getui16le(pos);
pos+=2;
if(n==0xffff) {
if(!got_cp) {
de_warn(c, "Missing codepoint for char #%d\n", (int)cur_idx);
}
cur_idx++;
got_cp = 0;
found_fffe = 0;
continue;
}
else if(n==0xfffe) {
found_fffe = 1;
}
if(found_fffe) {
// Anything after 0xfffe is a multi-codepoint character, which we
// don't support.
continue;
}
if(!got_cp) {
de_dbg2(c, "char[%d] = U+%04x\n", (int)cur_idx, (unsigned int)n);
font->char_array[cur_idx].codepoint_unicode = n;
got_cp = 1;
continue;
}
// This is an "extra" codepoint for the current glyph.
do_extra_codepoint(c, d, font, cur_idx, n);
}
font->has_unicode_codepoints = 1;
font->prefer_unicode = 1;
de_dbg_indent(c, -1);
}
static int read_fileheader(deark *c, lctx *d, de_int64 pos)
{
de_dbg(c, "file header at %d\n", (int)pos);
de_dbg_indent(c, 1);
de_dbg(c, "bfSize: %d\n", (int)d->fsize);
d->bits_offset = de_getui32le(pos+10);
de_dbg(c, "bfOffBits: %d\n", (int)d->bits_offset);
de_dbg_indent(c, -1);
return 1;
}
static int do_header(deark *c, lctx *d, i64 pos)
{
de_dbg(c, "header at %d", (int)pos);
de_dbg_indent(c, 1);
d->nlumps = de_getu32le(pos+4);
de_dbg(c, "#lumps: %d", (int)d->nlumps);
d->dir_pos = de_getu32le(pos+8);
de_dbg(c, "dir pos: %d", (int)d->dir_pos);
de_dbg_indent(c, -1);
return 1;
}
// Returns 0 if we should stop reading the file.
static int do_record(deark *c, lctx *d, de_int64 pos, de_int64 *bytesused)
{
int retval = 0;
struct opcode_data op;
de_int64 ptsin_size_bytes;
de_int64 intin_size_bytes;
de_int64 data_size_bytes;
const struct opcode_info *opinfo;
const char *opcode_name;
*bytesused = 0;
de_memset(&op, 0, sizeof(struct opcode_data));
de_dbg(c, "record at %d\n", (int)pos);
de_dbg_indent(c, 1);
op.opcode = de_getui16le(pos);
op.ptsin_count = de_getui16le(pos+2);
op.intin_count = de_getui16le(pos+4);
op.func_id = de_getui16le(pos+6);
ptsin_size_bytes = 4*op.ptsin_count;
intin_size_bytes = 2*op.intin_count;
data_size_bytes = ptsin_size_bytes + intin_size_bytes;
op.ptsin_pos = pos + 8;
op.intin_pos = pos + 8 + ptsin_size_bytes;
opinfo = find_opcode_info(op.opcode);
if(opinfo && opinfo->name)
opcode_name = opinfo->name;
else
opcode_name = "?";
de_dbg(c, "opcode=%d (%s), func_id=%d, #pts=%d, #int=%d (dlen=%d)\n",
(int)op.opcode, opcode_name, (int)op.func_id,
(int)op.ptsin_count, (int)op.intin_count,
(int)data_size_bytes);
*bytesused = 8 + data_size_bytes;
if(opinfo && opinfo->fn) {
opinfo->fn(c, d, &op);
}
if(op.opcode==65535) {
goto done;
}
retval = 1;
done:
de_dbg_indent(c, -1);
return retval;
}
static int read_pam_header(deark *c, lctx *d, struct page_ctx *pg, de_int64 pos1)
{
int ret;
de_int64 pos = pos1;
int retval = 0;
char linebuf[200];
char token1buf[200];
//char token2buf[200];
de_dbg(c, "header at %d\n", (int)pos1);
de_dbg_indent(c, 1);
de_err(c, "PAM format not supported\n");
goto done;
pos += 3; // Skip "P7\n"
while(1) {
de_int64 content_len;
de_int64 total_len;
de_int64 curpos;
//ret = dbuf_find_line(c->infile, pos,
// &content_len, &total_len);
ret = read_pam_header_line(c, d, pg, pos, &content_len, &total_len,
linebuf, sizeof(linebuf));
if(!ret) {
de_err(c, "Invalid PAM header\n");
break;
}
if(content_len>0 && (de_getbyte(pos)=='#')) {
// comment line
pos += total_len;
continue;
}
curpos = 0;
if(!read_next_pam_token(c, d, pg, linebuf, token1buf, sizeof(token1buf), &curpos)) goto done;
if(!de_strcmp(token1buf,"ENDHDR")) {
break;
}
pos += total_len;
continue;
}
retval = 1;
done:
de_dbg_indent(c, -1);
return retval;
}
static void do_para_info(deark *c, lctx *d)
{
i64 i;
if(d->pnPara_npages<1) return;
de_dbg(c, "paragraph info at %d, len=%d page(s)", (int)d->pnPara_offs, (int)d->pnPara_npages);
de_dbg_indent(c, 1);
for(i=0; i<d->pnPara_npages; i++) {
do_para_info_page(c, d, d->pnPara_offs + 128*i);
}
de_dbg_indent(c, -1);
}
static void do_read_linked_profile(deark *c, lctx *d)
{
de_ucstring *fname = NULL;
de_dbg(c, "linked profile filename at %d\n", (int)d->profile_offset);
fname = ucstring_create(c);
dbuf_read_to_ucstring_n(c->infile, d->profile_offset,
d->profile_size, 300, fname,
DE_CONVFLAG_STOP_AT_NUL, DE_ENCODING_WINDOWS1252);
de_dbg_indent(c, 1);
de_dbg(c, "profile filename: \"%s\"\n", ucstring_get_printable_sz(fname));
de_dbg_indent(c, -1);
ucstring_destroy(fname);
}
// This .vst (TrueVista) decoder is based on guesswork, on the limited information
// in the TGA spec, and on the behavior of XnView. It may not be correct.
static int do_read_vst_headers(deark *c, lctx *d)
{
int retval = 0;
de_dbg(c, "header at %d", 0);
de_dbg_indent(c, 1);
d->id_field_len = (i64)de_getbyte(0);
if(d->id_field_len==0) {
// ??? XnView seems to do something like this.
d->id_field_len=18;
}
d->cmpr_type = TGA_CMPR_NONE;
d->cmpr_name = "none";
d->main_image.width = de_getu16le(12);
d->main_image.height = de_getu16le(14);
de_dbg_dimensions(c, d->main_image.width, d->main_image.height);
d->pixel_depth = (i64)de_getbyte(16);
de_dbg(c, "pixel depth: %d", (int)d->pixel_depth);
if(d->pixel_depth==8) {
d->color_map_type = 1;
d->color_type = TGA_CLRTYPE_PALETTE;
d->clrtype_name = "palette";
}
else {
d->color_type = TGA_CLRTYPE_TRUECOLOR;
d->clrtype_name = "truecolor";
}
if(d->color_type==TGA_CLRTYPE_PALETTE) {
d->cmap_start = 0;
d->cmap_length = 256;
d->cmap_depth = 24;
}
do_read_image_descriptor(c, d);
de_dbg_indent(c, -1);
if(!de_good_image_dimensions(c, d->main_image.width, d->main_image.height)) goto done;
retval = 1;
done:
return retval;
}
static void read_palette_ximg(deark *c, lctx *d)
{
i64 pal_entries_in_file;
i64 pal_entries_to_read;
i64 i;
i64 cr1, cg1, cb1;
u8 cr, cg, cb;
int range_warned = 0;
char tmps[64];
pal_entries_in_file = (d->header_size_in_bytes-22)/3;
if(pal_entries_in_file<1) return;
if(d->nplanes<=8)
pal_entries_to_read = (i64)(1<<((unsigned int)d->nplanes));
else
pal_entries_to_read = 0;
if(pal_entries_to_read>pal_entries_in_file)
pal_entries_to_read = pal_entries_in_file;
if(pal_entries_to_read>256)
pal_entries_to_read = 256;
if(pal_entries_in_file<1) return;
de_dbg(c, "palette at %d", 22);
de_dbg_indent(c, 1);
for(i=0; i<pal_entries_to_read; i++) {
cr1 = de_getu16be(22 + 6*i);
cg1 = de_getu16be(22 + 6*i + 2);
cb1 = de_getu16be(22 + 6*i + 4);
cr = de_scale_1000_to_255(cr1);
cg = de_scale_1000_to_255(cg1);
cb = de_scale_1000_to_255(cb1);
d->pal[i] = DE_MAKE_RGB(cr, cg, cb);
de_snprintf(tmps, sizeof(tmps), "(%4d,%4d,%4d) "DE_CHAR_RIGHTARROW" ",
(int)cr1, (int)cg1, (int)cb1);
de_dbg_pal_entry2(c, (int)i, d->pal[i], tmps, NULL, NULL);
// TODO: Maybe some out-of-range colors have special meaning?
if(!range_warned && (cr1>1000 || cg1>1000 || cb1>1000)) {
de_warn(c, "Bad palette color #%d: is (%d,%d,%d), max=(1000,1000,1000).",
(int)i, (int)cr1, (int)cg1, (int)cb1);
range_warned=1;
}
}
de_dbg_indent(c, -1);
}
static void do_paragraph(deark *c, lctx *d, struct para_info *pinfo)
{
if(pinfo->papflags&0x10) {
de_dbg(c, "picture at %d, len=%d", (int)pinfo->thisparapos,
(int)pinfo->thisparalen);
de_dbg_indent(c, 1);
do_picture(c, d, pinfo);
de_dbg_indent(c, -1);
}
else {
de_dbg(c, "text paragraph at %d, len=%d", (int)pinfo->thisparapos,
(int)pinfo->thisparalen);
do_text_paragraph(c, d, pinfo);
}
}
static int do_directory(deark *c, lctx *d, i64 pos)
{
i64 k;
de_dbg(c, "directory at %d", (int)pos);
de_dbg_indent(c, 1);
if(pos<0 || pos>=c->infile->len) goto done;
if(d->nlumps<1 || d->nlumps>10000) goto done;
for(k=0; k<d->nlumps; k++) {
if(pos+16*k > c->infile->len-16) break;
do_lump_entry(c, d, k, pos+16*k);
}
done:
de_dbg_indent(c, -1);
return 1;
}
static int do_read_palette(deark *c, lctx *d, i64 pos, i64 *pal_nbytes)
{
de_dbg(c, "palette at %d", (int)pos);
de_dbg_indent(c, 1);
d->num_pal_entries = de_getu16le(pos) + 1;
de_dbg(c, "number of palette colors: %d", (int)d->num_pal_entries);
if(d->palette_is_hls)
*pal_nbytes = 2 + d->num_pal_entries * 6;
else
*pal_nbytes = 2 + d->num_pal_entries * 3;
if(d->palette_is_hls) goto done;
de_read_palette_rgb(c->infile, pos+2, d->num_pal_entries, 3, d->pal, 256, 0);
done:
de_dbg_indent(c, -1);
return 1;
}
// pos1 points to the ole_id field (should be 0x00000501).
// Returns nonzero if there may be additional renditions.
static int do_picture_ole_rendition(deark *c, lctx *d, struct para_info *pinfo,
unsigned int objectType,
int rendition_idx, i64 pos1, i64 *bytes_consumed)
{
unsigned int ole_id;
unsigned int objectType2;
int retval = 0;
de_dbg(c, "OLE rendition[%d] at %d", rendition_idx, (int)pos1);
de_dbg_indent(c, 1);
ole_id = (unsigned int)de_getu32le(pos1);
de_dbg(c, "ole id: 0x%08x", ole_id);
if(ole_id!=0x00000501U) {
de_err(c, "Unexpected ole_id: 0x%08x", ole_id);
goto done;
}
objectType2 = (unsigned int)de_getu32le(pos1+4);
de_dbg(c, "type: %u", objectType2);
if(objectType==1) {
if(objectType2==3) {
do_picture_ole_static_rendition(c, d, pinfo, rendition_idx, pos1, bytes_consumed);
}
}
else if(objectType==2) {
if(objectType2==0) {
goto done;
}
else if(objectType2==2) {
do_picture_ole_embedded_rendition(c, d, pinfo, rendition_idx, pos1, bytes_consumed);
retval = 1;
}
else if(objectType2==5) { // replacement
do_picture_ole_static_rendition(c, d, pinfo, rendition_idx, pos1, bytes_consumed);
}
}
done:
de_dbg_indent(c, -1);
return retval;
}
static int do_picture_ole_static_rendition(deark *c, lctx *d, struct para_info *pinfo,
int rendition_idx, i64 pos1, i64 *bytes_consumed)
{
i64 pos = pos1;
i64 stringlen;
struct de_stringreaderdata *srd_typename = NULL;
pos += 4; // 0x00000501
pos += 4; // "type" (probably already read by caller)
stringlen = de_getu32le_p(&pos);
srd_typename = dbuf_read_string(c->infile, pos, stringlen, 260, DE_CONVFLAG_STOP_AT_NUL,
DE_ENCODING_ASCII);
de_dbg(c, "typename: \"%s\"", ucstring_getpsz(srd_typename->str));
pos += stringlen;
if(!de_strcmp(srd_typename->sz, "DIB")) {
pos += 12;
de_dbg_indent(c, 1);
de_run_module_by_id_on_slice(c, "dib", NULL, c->infile, pos,
pinfo->thisparapos+pinfo->thisparalen-pos);
de_dbg_indent(c, -1);
}
else if(!de_strcmp(srd_typename->sz, "METAFILEPICT")) {
i64 dlen;
pos += 8; // ??
dlen = de_getu32le_p(&pos);
de_dbg(c, "metafile size: %d", (int)dlen); // Includes "mfp", apparently
pos += 8; // "mfp" struct
dbuf_create_file_from_slice(c->infile, pos, dlen-8, "wmf", NULL, 0);
}
else if(!de_strcmp(srd_typename->sz, "BITMAP")) {
do_static_bitmap(c, d, pinfo, pos);
}
else {
de_warn(c, "Static OLE picture type \"%s\" is not supported",
ucstring_getpsz(srd_typename->str));
}
de_destroy_stringreaderdata(c, srd_typename);
return 0;
}
static int do_lead_section(deark *c, lctx *d)
{
int retval = 0;
de_dbg(c, "lead section at %d", 0);
de_dbg_indent(c, 1);
d->ver_major = de_getbyte(4);
d->ver_minor = de_getbyte(5);
de_dbg(c, "RPM format version: %d.%d", (int)d->ver_major, (int)d->ver_minor);
if(d->ver_major < 3) {
de_err(c, "Unsupported RPM version (%d.%d)", (int)d->ver_major, (int)d->ver_minor);
goto done;
}
retval = 1;
done:
de_dbg_indent(c, -1);
return retval;
}
static void de_run_woz(deark *c, de_module_params *mparams)
{
lctx *d = NULL;
struct de_iffctx *ictx = NULL;
u32 crc;
i64 pos = 0;
// WOZ has a 12-byte header, then sequence of chunks that are basically the
// same format as RIFF.
d = de_malloc(c, sizeof(lctx));
ictx = de_malloc(c, sizeof(struct de_iffctx));
ictx->userdata = (void*)d;
ictx->preprocess_chunk_fn = my_preprocess_woz_chunk_fn;
ictx->handle_chunk_fn = my_woz_chunk_handler;
ictx->f = c->infile;
ictx->is_le = 1;
ictx->reversed_4cc = 0;
if(ictx->f->len<12) goto done;
de_dbg(c, "header at %d", (int)pos);
de_dbg_indent(c, 1);
pos += 3; // "WOZ" part of signature
d->wozver = dbuf_getbyte_p(ictx->f, &pos);
de_dbg(c, "format version: '%c'", de_byte_to_printable_char(d->wozver));
if(d->wozver<'1' || d->wozver>'2') {
de_err(c, "Unsupported WOZ format version");
goto done;
}
pos += 4; // rest of signature
crc = (u32)dbuf_getu32le_p(ictx->f, &pos);
de_dbg(c, "crc: 0x%08x", (unsigned int)crc);
de_dbg_indent(c, -1);
de_fmtutil_read_iff_format(c, ictx, pos, ictx->f->len-pos);
done:
de_free(c, ictx);
de_free(c, d);
}
static void do_read_image_descriptor(deark *c, lctx *d)
{
d->image_descriptor = de_getbyte(17);
de_dbg(c, "descriptor: 0x%02x", (unsigned int)d->image_descriptor);
de_dbg_indent(c, 1);
d->num_attribute_bits = (i64)(d->image_descriptor & 0x0f);
de_dbg(c, "number of %s bits: %d",
d->file_format==FMT_VST?"alpha channel":"attribute",
(int)d->num_attribute_bits);
d->right_to_left = (d->image_descriptor>>4)&0x01;
d->top_down = (d->image_descriptor>>5)&0x01;
de_dbg(c, "right-to-left flag: %d", (int)d->right_to_left);
de_dbg(c, "top-down flag: %d", (int)d->top_down);
d->interleave_mode = d->image_descriptor >> 6;
if(d->interleave_mode != 0) {
de_dbg(c, "interleaving: %d", (int)d->interleave_mode);
}
de_dbg_indent(c, -1);
}
static void do_read_footer(deark *c, lctx *d)
{
i64 footerpos;
i64 ext_offset, dev_offset;
footerpos = c->infile->len - 26;
de_dbg(c, "v2 footer at %d", (int)footerpos);
de_dbg_indent(c, 1);
ext_offset = de_getu32le(footerpos);
de_dbg(c, "extension area offset: %d", (int)ext_offset);
dev_offset = de_getu32le(footerpos+4);
de_dbg(c, "developer area offset: %d", (int)dev_offset);
de_dbg_indent(c, -1);
if(ext_offset!=0) {
do_read_extension_area(c, d, ext_offset);
}
if(dev_offset!=0) {
do_read_developer_area(c, d, dev_offset);
}
}
static int do_header(deark *c, lctx *d, i64 pos)
{
de_dbg(c, "header at %d", (int)pos);
de_dbg_indent(c, 1);
d->fcMac = de_getu32le(pos+7*2);
de_dbg(c, "fcMac: %d", (int)d->fcMac);
d->pnChar = (d->fcMac + 127) / 128;
d->pnChar_offs = d->pnChar * 128;
de_dbg(c, "pnChar: page %d (offset %d)", (int)d->pnChar, (int)d->pnChar_offs);
d->pnPara = de_getu16le(pos+9*2);
d->pnPara_offs = d->pnPara * 128;
de_dbg(c, "pnPara: page %d (offset %d)", (int)d->pnPara, (int)d->pnPara_offs);
d->pnFntb = de_getu16le(pos+10*2);
de_dbg(c, "pnFntb: page %d", (int)d->pnFntb);
d->pnSep = de_getu16le(pos+11*2);
de_dbg(c, "pnSep: page %d", (int)d->pnSep);
d->pnSetb = de_getu16le(pos+12*2);
de_dbg(c, "pnSetb: page %d", (int)d->pnSetb);
d->pnPgtb = de_getu16le(pos+13*2);
de_dbg(c, "pnPgtb: page %d", (int)d->pnPgtb);
d->pnFfntb = de_getu16le(pos+14*2);
de_dbg(c, "pnFfntb: page %d", (int)d->pnFfntb);
d->pnMac = de_getu16le(pos+48*2);
de_dbg(c, "pnMac: %d pages", (int)d->pnMac);
d->pnPara_npages = d->pnFntb - d->pnPara;
de_dbg_indent(c, -1);
return 1;
}
static void do_decode_thumbnail(deark *c, lctx *d)
{
dbuf *unc_pixels = NULL;
i64 hdrsize = 2;
de_dbg(c, "thumbnail image at %d", (int)d->thumbnail_offset);
de_dbg_indent(c, 1);
// The thumbnail image is supposed to use the same format as the main image,
// except without compression. (And the dimensions are obviously different.)
// Presumably this means the origin, palette, etc. will be the same.
// But based on the few TGA thumbnails we've seen, nobody reads the spec, and
// it's anybody's guess what format the thumbnail will use.
// TGA 2.0 spec says the dimensions are one *byte* each.
d->thumbnail_image.width = (i64)de_getbyte(d->thumbnail_offset);
d->thumbnail_image.height = (i64)de_getbyte(d->thumbnail_offset+1);
de_dbg(c, "thumbnail dimensions: %d"DE_CHAR_TIMES"%d", (int)d->thumbnail_image.width, (int)d->thumbnail_image.height);
if(d->thumbnail_image.width!=0 && d->thumbnail_image.height==0) {
de_warn(c, "Thumbnail image height is 0. Assuming the file incorrectly uses "
"16-bit thumbnail dimensions, instead of 8.");
d->thumbnail_image.width = de_getu16le(d->thumbnail_offset);
d->thumbnail_image.height = de_getu16le(d->thumbnail_offset+2);
de_dbg(c, "revised thumbnail dimensions: %d"DE_CHAR_TIMES"%d", (int)d->thumbnail_image.width, (int)d->thumbnail_image.height);
hdrsize = 4;
}
if(!de_good_image_dimensions(c, d->thumbnail_image.width, d->thumbnail_image.height)) goto done;
d->thumbnail_image.img_size_in_bytes = d->thumbnail_image.height * d->thumbnail_image.width * d->bytes_per_pixel;
unc_pixels = dbuf_open_input_subfile(c->infile, d->thumbnail_offset+hdrsize, d->thumbnail_image.img_size_in_bytes);
do_decode_image(c, d, &d->thumbnail_image, unc_pixels, "thumb", DE_CREATEFLAG_IS_AUX);
done:
dbuf_close(unc_pixels);
de_dbg_indent(c, -1);
}
static void run_ogg_internal(deark *c, lctx *d)
{
i64 pos;
i64 ogg_end;
struct de_id3info id3i;
d->always_hexdump = de_get_ext_option(c, "ogg:hexdump")?1:0;
d->streamtable = de_inthashtable_create(c);
de_fmtutil_handle_id3(c, c->infile, &id3i, 0);
pos = id3i.main_start;
ogg_end = id3i.main_end;
while(1) {
u32 sig;
int ret;
i64 bytes_consumed = 0;
if(pos >= ogg_end) break;
sig = (u32)de_getu32be(pos);
if(sig!=0x04f676753U) {
de_err(c, "Ogg page signature not found at %"I64_FMT, pos);
break;
}
de_dbg(c, "page at %"I64_FMT, pos);
de_dbg_indent(c, 1);
ret = do_ogg_page(c, d, pos, &bytes_consumed);
de_dbg_indent(c, -1);
if(!ret || bytes_consumed<=4) break;
pos += bytes_consumed;
d->total_page_count++;
}
if(!d->format_declared) declare_ogg_format(c, d);
de_dbg(c, "number of bitstreams: %d", (int)d->bitstream_count);
}
static void do_lump_entry(deark *c, lctx *d, i64 lump_idx, i64 pos)
{
i64 lump_pos;
i64 lump_size;
struct de_stringreaderdata *srd = NULL;
de_dbg(c, "lump[%d] dir entry at %d", (int)lump_idx, (int)pos);
de_dbg_indent(c, 1);
lump_pos = de_getu32le(pos);
de_dbg(c, "data pos: %d", (int)lump_pos);
lump_size = de_getu32le(pos+4);
de_dbg(c, "data size: %d", (int)lump_size);
// dbuf_read_string is used (instead of dbuf_read_to_ucstring) because
// the names have special meanings, so someday we might want to run
// comparisons against them. But currently we don't do that.
srd = dbuf_read_string(c->infile, pos+8, 8, 8, DE_CONVFLAG_STOP_AT_NUL, DE_ENCODING_ASCII);
de_dbg(c, "name: \"%s\"", ucstring_getpsz_d(srd->str));
do_lump_extract(c, d, lump_pos, lump_size, srd);
de_dbg_indent(c, -1);
de_destroy_stringreaderdata(c, srd);
}
static void do_read_palette(deark *c, lctx *d)
{
de_int64 pal_size_in_bytes;
if(d->pal_entries<1) return;
pal_size_in_bytes = d->pal_entries*d->bytes_per_pal_entry;
if(d->pal_pos+pal_size_in_bytes > d->bits_offset) {
de_warn(c, "Palette at %d (size %d) overlaps bitmap at %d\n",
(int)d->pal_pos, (int)pal_size_in_bytes, (int)d->bits_offset);
if(d->version==DE_BMPVER_OS2V2) {
do_os2v2_bad_palette(c, d);
}
}
de_dbg(c, "color table at %d, %d entries\n", (int)d->pal_pos, (int)d->pal_entries);
de_dbg_indent(c, 1);
de_read_palette_rgb(c->infile, d->pal_pos, d->pal_entries, d->bytes_per_pal_entry,
d->pal, 256, DE_GETRGBFLAG_BGR);
d->pal_is_grayscale = de_is_grayscale_palette(d->pal, d->pal_entries);
de_dbg_indent(c, -1);
}