static void do_read_bitmap(deark *c, lctx *d, de_int64 pos)
{
de_int64 ver_num;
dbuf *unc_pixels = NULL;
ver_num = de_getui32be(pos);
de_dbg(c, "version number: %u\n", (unsigned int)ver_num);
if(ver_num!=0 && ver_num!=2 && ver_num!=3) {
de_warn(c, "Unrecognized version number: %u\n", (unsigned int)ver_num);
}
pos += 512;
unc_pixels = dbuf_create_membuf(c, MACPAINT_IMAGE_BYTES, 1);
de_fmtutil_uncompress_packbits(c->infile, pos, c->infile->len - pos, unc_pixels, NULL);
if(unc_pixels->len < MACPAINT_IMAGE_BYTES) {
de_warn(c, "Image decompressed to %d bytes, expected %d.\n",
(int)unc_pixels->len, (int)MACPAINT_IMAGE_BYTES);
}
de_convert_and_write_image_bilevel(unc_pixels, 0,
MACPAINT_WIDTH, MACPAINT_HEIGHT, MACPAINT_WIDTH/8,
DE_CVTF_WHITEISZERO, NULL, 0);
dbuf_close(unc_pixels);
}
static int do_gem_img(deark *c, lctx *d)
{
dbuf *unc_pixels = NULL;
de_bitmap *img = NULL;
de_finfo *fi = NULL;
int is_color = 0;
i64 k;
if(d->header_size_in_words==9 && (d->nplanes==3 || d->nplanes==4)) {
i64 x;
x = de_getu16be(8*2);
if(x==0) {
is_color = 1;
}
}
de_dbg(c, "image at %d", (int)d->header_size_in_bytes);
unc_pixels = dbuf_create_membuf(c, d->rowspan_total*d->h, 0);
uncompress_pixels(c, d, unc_pixels, d->header_size_in_bytes, c->infile->len-d->header_size_in_bytes);
img = de_bitmap_create(c, d->w, d->h, is_color?3:1);
fi = de_finfo_create(c);
set_density(c, d, fi);
if(d->nplanes==1) {
de_convert_image_bilevel(unc_pixels, 0, d->rowspan_per_plane, img, DE_CVTF_WHITEISZERO);
}
else if(is_color && d->nplanes==3) {
for(k=0; k<8; k++) {
d->pal[k] = pal3bit[k];
}
read_paletted_image(c, d, unc_pixels, img);
}
else if(is_color && d->nplanes==4) {
for(k=0; k<16; k++) {
d->pal[k] = pal4bit[k];
}
read_paletted_image(c, d, unc_pixels, img);
}
else {
de_make_grayscale_palette(d->pal, ((i64)1)<<((unsigned int)d->nplanes), 1);
read_paletted_image(c, d, unc_pixels, img);
}
de_bitmap_write_to_file_finfo(img, fi, 0);
de_bitmap_destroy(img);
de_finfo_destroy(c, fi);
dbuf_close(unc_pixels);
return 1;
}
static void do_vorbis_page(deark *c, lctx *d, struct page_info *pgi, struct stream_info *si)
{
u8 firstbyte;
if(pgi->is_first_page) {
// The first Ogg page of a bitstream usually contains enough data to be
// useful. So, we'll try to process it directly, without reconstructing
// the codec bitstream.
do_vorbis_id_header(c, d, pgi, si);
}
// We want to save a copy of the Comment and Setup header data,
// but not the Identification header which is handled elsewhere.
if(si->stream_state!=0) {
// We've already handled the Comment & Setup headers.
goto done;
}
if(pgi->dlen<1) goto done;
firstbyte = de_getbyte(pgi->dpos);
if(si->page_count==0 || pgi->page_seq_num==0 || (pgi->hdr_type&0x02)) {
// This appears to be the Identification header page. Skip it.
goto done;
}
if(pgi->page_seq_num>=1 && (firstbyte&0x01)) {
// This appears to be one of the pages we care about.
// Save its data for later.
if(!si->header_stream) {
si->header_stream = dbuf_create_membuf(c, 1048576, 1);
}
dbuf_copy(c->infile, pgi->dpos, pgi->dlen, si->header_stream);
}
else if((firstbyte&0x01)==0) {
// Reached the end of headers (by encountering a non-header page).
// (There is required to be an Ogg page break immediately after the
// Vorbis headers, so the start of the first data *page* must correspond
// to the start of the first data *packet*. A Vorbis data packet always
// begins with a byte whose low bit is 0.)
do_theora_vorbis_after_headers(c, d, si);
}
done:
;
}
static void do_decode_24bit(deark *c, lctx *d, struct page_ctx *pg)
{
dbuf *unc_pixels = NULL;
struct deark_bitmap *img = NULL;
de_int64 i, j;
de_byte cr, cg, cb, ca;
de_int64 w, h;
de_int64 skip;
w = pg->type_info->width;
h = pg->type_info->height;
// TODO: Try to support uncompressed 24-bit images, assuming they exist.
// Apparently, some 'it32' icons begin with four extra 0x00 bytes.
// Skip over the first four bytes if they are 0x00.
// (I don't know the reason for these bytes, but this is the same
// logic libicns uses.)
skip = 0;
if(pg->code4cc.id==0x69743332) { // 'it32' (128x128)
if(!dbuf_memcmp(c->infile, pg->image_pos, "\0\0\0\0", 4)) {
skip = 4;
}
}
unc_pixels = dbuf_create_membuf(c, w*h*3, 1);
do_uncompress_24(c, d, pg, unc_pixels, skip);
img = de_bitmap_create(c, w, h, 4);
for(j=0; j<pg->type_info->height; j++) {
for(i=0; i<pg->type_info->width; i++) {
cr = dbuf_getbyte(unc_pixels, j*w + i);
cg = dbuf_getbyte(unc_pixels, (h+j)*w + i);
cb = dbuf_getbyte(unc_pixels, (2*h+j)*w + i);
if(pg->mask_pos)
ca = de_getbyte(pg->mask_pos + j*w + i);
else
ca = 0xff;
de_bitmap_setpixel_rgba(img, i, j, DE_MAKE_RGBA(cr,cg,cb,ca));
}
}
de_bitmap_write_to_file(img, pg->filename_token, 0);
de_bitmap_destroy(img);
if(unc_pixels) dbuf_close(unc_pixels);
}
static void uncompress_pixels(deark *c, lctx *d, dbuf *unc_pixels,
i64 pos1, i64 len)
{
i64 bytes_consumed;
i64 pos;
i64 ypos;
i64 repeat_count;
i64 k;
i64 plane;
dbuf *unc_line = NULL;
d->pattern_buf = de_malloc(c, d->patlen);
unc_line = dbuf_create_membuf(c, d->rowspan_total, 0);
pos = pos1;
ypos = 0;
while(1) {
if(ypos >= d->h) break;
repeat_count = 1;
dbuf_empty(unc_line);
for(plane=0; plane<d->nplanes; plane++) {
uncompress_line(c, d, unc_line,
pos, ypos, &bytes_consumed, &repeat_count);
pos+=bytes_consumed;
if(bytes_consumed<1) goto done1;
}
for(k=0; k<repeat_count; k++) {
if(ypos >= d->h) break;
dbuf_copy(unc_line, 0, d->rowspan_total, unc_pixels);
ypos++;
}
}
done1:
dbuf_close(unc_line);
de_free(c, d->pattern_buf);
d->pattern_buf = NULL;
}
// Read and process the keyword, language, translated keyword, or main text
// field of a tEXt/zTXt/iTXt chunk.
// 'bytes_consumed' does not include the NUL separator/terminator.
// This is a wrapper that first decompresses the field if necessary.
static int do_text_field(deark *c, lctx *d,
struct text_chunk_ctx *tcc, int which_field,
i64 pos, i64 bytes_avail,
int is_nul_terminated, int is_compressed, int encoding,
i64 *bytes_consumed)
{
dbuf *tmpdbuf = NULL;
int retval = 0;
i64 bytes_consumed2;
if(!is_compressed) {
retval = do_unc_text_field(c, d, tcc,
which_field, c->infile, pos, bytes_avail,
is_nul_terminated, encoding, bytes_consumed);
goto done;
}
// Decompress to a membuf, then call do_unc_text_field() with that membuf.
// Note that a compressed field cannot be NUL-terminated.
*bytes_consumed = bytes_avail;
tmpdbuf = dbuf_create_membuf(c, 0, 0);
if(!de_decompress_deflate(c->infile, pos, bytes_avail, tmpdbuf, 0, NULL,
d->is_CgBI ? 0 : DE_DEFLATEFLAG_ISZLIB))
{
goto done;
}
retval = do_unc_text_field(c, d, tcc,
which_field, tmpdbuf, 0, tmpdbuf->len,
0, encoding, &bytes_consumed2);
done:
dbuf_close(tmpdbuf);
return retval;
}
static void de_run_tga(deark *c, de_module_params *mparams)
{
lctx *d = NULL;
i64 pos;
dbuf *unc_pixels = NULL;
int saved_indent_level;
i64 rowspan_tmp;
de_dbg_indent_save(c, &saved_indent_level);
d = de_malloc(c, sizeof(lctx));
detect_file_format(c, d);
if(d->file_format==FMT_VST) {
de_declare_fmt(c, "TrueVista");
}
else {
de_declare_fmt(c, "TGA");
}
pos = 0;
if(d->file_format==FMT_VST) {
if(!do_read_vst_headers(c, d)) goto done;
}
else {
if(!do_read_tga_headers(c, d)) goto done;
}
pos += 18;
if(d->id_field_len>0) {
de_dbg(c, "image ID at %d (len=%d)", (int)pos, (int)d->id_field_len);
pos += d->id_field_len;
}
if(d->color_map_type!=0) {
d->bytes_per_pal_entry = (d->cmap_depth+7)/8;
d->pal_size_in_bytes = d->cmap_length * d->bytes_per_pal_entry;
de_dbg(c, "color map at %d (%d colors, %d bytes)", (int)pos,
(int)d->cmap_length, (int)d->pal_size_in_bytes);
de_dbg_indent(c, 1);
if(!do_read_palette(c, d, pos)) goto done;
de_dbg_indent(c, -1);
pos += d->pal_size_in_bytes;
}
de_dbg(c, "bitmap at %d", (int)pos);
de_dbg_indent(c, 1);
d->bytes_per_pixel = ((d->pixel_depth+7)/8);
if(d->pixel_depth==1) {
rowspan_tmp = (d->main_image.width+7)/8;
}
else {
rowspan_tmp = d->main_image.width * d->bytes_per_pixel;
}
d->main_image.img_size_in_bytes = d->main_image.height * rowspan_tmp;
if(d->color_type!=TGA_CLRTYPE_PALETTE && d->color_type!=TGA_CLRTYPE_TRUECOLOR &&
d->color_type!=TGA_CLRTYPE_GRAYSCALE)
{
de_err(c, "Unsupported color type (%d: %s)", (int)d->color_type, d->clrtype_name);
goto done;
}
if( (d->color_type==TGA_CLRTYPE_PALETTE && d->pixel_depth==8) ||
(d->color_type==TGA_CLRTYPE_TRUECOLOR && d->pixel_depth==15) ||
(d->color_type==TGA_CLRTYPE_TRUECOLOR && d->pixel_depth==16) ||
(d->color_type==TGA_CLRTYPE_TRUECOLOR && d->pixel_depth==24) ||
(d->color_type==TGA_CLRTYPE_TRUECOLOR && d->pixel_depth==32) ||
(d->color_type==TGA_CLRTYPE_GRAYSCALE && d->pixel_depth==1) ||
(d->color_type==TGA_CLRTYPE_GRAYSCALE && d->pixel_depth==8) )
{
;
}
else {
de_err(c, "Unsupported TGA image type (%s, depth=%d)", d->clrtype_name,
(int)d->pixel_depth);
goto done;
}
if(d->cmpr_type==TGA_CMPR_RLE) {
if(d->pixel_depth<8) {
de_err(c, "RLE compression not supported when depth (%d) is less than 8",
(int)d->pixel_depth);
goto done;
}
unc_pixels = dbuf_create_membuf(c, d->main_image.img_size_in_bytes, 1);
if(!do_decode_rle(c, d, pos, unc_pixels)) goto done;
}
else if(d->cmpr_type==TGA_CMPR_NONE) {
unc_pixels = dbuf_open_input_subfile(c->infile, pos, d->main_image.img_size_in_bytes);
}
else {
de_err(c, "Unsupported compression type (%d, %s)", (int)d->cmpr_type, d->cmpr_name);
goto done;
}
// Maybe scan the image, to help detect transparency.
do_prescan_image(c, d, unc_pixels);
if(d->pixel_depth==32) {
de_dbg(c, "using alpha channel: %s", d->has_alpha_channel?"yes":"no");
}
// TODO: 16-bit images could theoretically have a transparency bit, but I don't
// know how to detect that.
do_decode_image(c, d, &d->main_image, unc_pixels, NULL, 0);
de_dbg_indent(c, -1);
if(d->thumbnail_offset!=0) {
do_decode_thumbnail(c, d);
}
done:
dbuf_close(unc_pixels);
de_dbg_indent_restore(c, saved_indent_level);
de_free(c, d);
}
static void de_run_alphabmp(deark *c, de_module_params *mparams)
{
unsigned int flags;
lctx *d = NULL;
i64 pos;
i64 palsize;
dbuf *unc_pixels = NULL;
int saved_indent_level;
de_dbg_indent_save(c, &saved_indent_level);
d = de_malloc(c, sizeof(lctx));
de_declare_fmt(c, "Alpha Microsystems BMP");
pos = 10;
de_dbg(c, "bitmap image definition block at %d", (int)pos);
de_dbg_indent(c, 1);
d->w = de_getu16le(pos);
d->h = de_getu16le(pos+2);
de_dbg_dimensions(c, d->w, d->h);
if(!de_good_image_dimensions(c, d->w, d->h)) goto done;
d->bpp = de_getu16le(pos+4);
de_dbg(c, "bits/pixel: %d", (int)d->bpp);
flags = (unsigned int)de_getu16le(pos+6);
d->has_palette = flags & 0x01;
d->palette_is_hls = (flags>>1) & 0x01;
de_dbg(c, "has-palette: %d", (int)d->has_palette);
if(d->has_palette)
de_dbg(c, "palette-is-HLS: %d", (int)d->palette_is_hls);
d->compression = de_getu16le(pos+8);
de_dbg(c, "compression: %d", (int)d->compression);
de_dbg_indent(c, -1);
pos += 70;
if(d->has_palette) {
if(d->palette_is_hls && d->bpp<=8) {
de_err(c, "HLS palettes are not supported");
goto done;
}
if(!do_read_palette(c, d, pos, &palsize)) goto done;
pos += palsize;
}
else if(d->bpp<=8) {
de_err(c, "Paletted images without an embedded palette are not supported");
goto done;
}
de_dbg(c, "bitmap at %d", (int)pos);
de_dbg_indent(c, 1);
if(d->compression) {
unc_pixels = dbuf_create_membuf(c, 32768, 0);
if(!do_uncompress_image(c, d, pos, unc_pixels)) goto done;
}
else {
unc_pixels = dbuf_open_input_subfile(c->infile, pos, c->infile->len - pos);
}
if(d->bpp!=1 && d->bpp!=4 && d->bpp!=8 && d->bpp!=24) {
de_err(c, "%d bits/pixel is not supported", (int)d->bpp);
goto done;
}
do_bitmap(c, d, unc_pixels);
de_dbg_indent(c, -1);
done:
de_dbg_indent_restore(c, saved_indent_level);
dbuf_close(unc_pixels);
de_free(c, d);
}
// Generic (ImageMagick?) profile. Hex-encoded, with three header lines.
static void on_im_generic_profile_main(deark *c, lctx *d,
struct text_chunk_ctx *tcc, dbuf *inf, i64 pos1, i64 len)
{
int k;
i64 pos = pos1;
i64 dlen;
int dump_to_file = 0;
int decode_to_membuf = 0;
const char *ext = NULL;
// Skip the first three lines
for(k=0; k<3; k++) {
int ret;
i64 foundpos = 0;
ret = dbuf_search_byte(inf, 0x0a, pos, pos1+len-pos, &foundpos);
if(!ret) goto done;
pos = foundpos+1;
}
dlen = pos1+len-pos;
if(tcc->im_generic_profile_type==PROFILETYPE_XMP) {
dump_to_file = 1;
ext = "xmp";
}
else if(tcc->im_generic_profile_type==PROFILETYPE_8BIM) {
decode_to_membuf = 1;
}
else if(tcc->im_generic_profile_type==PROFILETYPE_IPTC) {
if(c->extract_level>=2) {
dump_to_file = 1;
ext = "iptc";
}
else {
decode_to_membuf = 1;
}
}
else if(tcc->im_generic_profile_type==PROFILETYPE_ICC) {
dump_to_file = 1;
ext = "icc";
}
else {
if(c->extract_level>=2) {
dump_to_file = 1;
ext = "profile.bin";
}
}
if(dump_to_file) {
dbuf *outf;
outf = dbuf_create_output_file(c, ext?ext:"bin", NULL, DE_CREATEFLAG_IS_AUX);
de_decode_base16(c, inf, pos, dlen, outf, 0);
dbuf_close(outf);
}
if(decode_to_membuf) {
dbuf *tmpf;
tmpf = dbuf_create_membuf(c, 0, 0);
de_decode_base16(c, inf, pos, dlen, tmpf, 0);
if(tcc->im_generic_profile_type==PROFILETYPE_8BIM) {
de_fmtutil_handle_photoshop_rsrc(c, tmpf, 0, tmpf->len, 0x0);
}
else if(tcc->im_generic_profile_type==PROFILETYPE_IPTC) {
de_fmtutil_handle_iptc(c, tmpf, 0, tmpf->len, 0x0);
}
dbuf_close(tmpf);
}
done:
;
}
// XIMG and similar formats.
// TODO: Should this function be merged with do_gem_img()?
static int do_gem_ximg(deark *c, lctx *d)
{
dbuf *unc_pixels = NULL;
de_bitmap *img = NULL;
de_finfo *fi = NULL;
int retval = 0;
int saved_indent_level;
de_dbg_indent_save(c, &saved_indent_level);
de_dbg(c, "header (continued) at %d", 8*2);
de_dbg_indent(c, 1);
if((d->nplanes>=1 && d->nplanes<=8) /* || d->nplanes==24 */) {
;
}
else {
if(d->is_ximg)
de_err(c, "%d-plane XIMG images are not supported", (int)d->nplanes);
else
de_err(c, "This type of %d-plane image is not supported", (int)d->nplanes);
goto done;
}
if(d->header_size_in_words==25 && !d->is_ximg) {
i64 pal_pos = d->header_size_in_bytes-32;
de_dbg(c, "palette at %d", (int)pal_pos);
de_dbg_indent(c, 1);
de_fmtutil_read_atari_palette(c, c->infile, pal_pos,
d->pal, 16, ((i64)1)<<d->nplanes, 0);
de_dbg_indent(c, -1);
}
else {
read_palette_ximg(c, d);
}
if(d->nplanes==1 && d->pal[0]==d->pal[1]) {
de_dbg(c, "Palette doesn't seem to be present. Using a default palette.");
d->pal[0] = DE_STOCKCOLOR_WHITE;
d->pal[1] = DE_STOCKCOLOR_BLACK;
}
de_dbg_indent(c, -1);
de_dbg(c, "image at %d", (int)d->header_size_in_bytes);
unc_pixels = dbuf_create_membuf(c, d->rowspan_total*d->h, 0);
uncompress_pixels(c, d, unc_pixels, d->header_size_in_bytes, c->infile->len-d->header_size_in_bytes);
img = de_bitmap_create(c, d->w, d->h, 3);
fi = de_finfo_create(c);
set_density(c, d, fi);
if(d->nplanes>8) {
read_rgb_image(c, d, unc_pixels, img);
}
else {
read_paletted_image(c, d, unc_pixels, img);
}
de_bitmap_write_to_file_finfo(img, fi, 0);
retval = 1;
done:
de_bitmap_destroy(img);
de_finfo_destroy(c, fi);
dbuf_close(unc_pixels);
de_dbg_indent_restore(c, saved_indent_level);
return retval;
}