コード例 #1
0
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);
}
コード例 #2
0
ファイル: gemras.c プロジェクト: jsummers/deark
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;
}
コード例 #3
0
ファイル: ogg.c プロジェクト: jsummers/deark
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:
	;
}
コード例 #4
0
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);
}
コード例 #5
0
ファイル: gemras.c プロジェクト: jsummers/deark
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;
}
コード例 #6
0
ファイル: png.c プロジェクト: jsummers/deark
// 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;
}
コード例 #7
0
ファイル: tga.c プロジェクト: jsummers/deark
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);
}
コード例 #8
0
ファイル: alphabmp.c プロジェクト: jsummers/deark
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);
}
コード例 #9
0
ファイル: png.c プロジェクト: jsummers/deark
// 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:
	;
}
コード例 #10
0
ファイル: gemras.c プロジェクト: jsummers/deark
// 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;
}