[File] [PATCH] of Magdir/images VDC bitmap *.vbm *.bm versus BMP
Jörg Jenderek
joerg.jen.der.ek at gmx.net
Mon May 3 18:42:06 UTC 2021
Hello,
some days ago my system with Windows 10 updates itself. When checking
the system with ccleaner many file name associations are now broken.
So i look for the reported filename extension.
One file name extension is BM. So i run file command version 5.40 on
such examples and related files and i get output like:
toucan.bm: data
coke_can.vbm: data
oldmill.vbm: data
winona2.vbm: data
MARBLES-v3-.vbm: data
MARBLES-v3-comment.vbm: data
MARBLES-v3-rle.vbm: data
MARBLES.PBM: Netpbm image data, size = 1152 x 813
, rawbits, bitmap
rpc-org-favicon.ico: PC bitmap, Windows 3.x format,
16 x 16 x 24,
resolution 3780 x 3780 px/m,
cbSize 822, bits offset 54
politik-digital-favicon.ico: PC bitmap, Windows 3.x format,
15 x 16 x 8,
resolution 2834 x 2834 px/m,
cbSize 1336, bits offset 1078
score9.bmp: PC bitmap, Windows 3.x format,
32 x 32 x 8,
resolution 5333 x 5333 px/m,
cbSize 54, bits offset 1078
bubbles.bmp: PC bitmap, Windows 3.x format,
64 x 64 x 4, image size 2048,
resolution 2835 x 2835 px/m,
4 important colors,
cbSize 2118, bits offset 70
pal8v4.bmp: PC bitmap, Windows 95/NT4
and newer format,
127 x 64 x 8
rgb32-xbgr.bmp: PC bitmap, Windows 98/2000
and newer format,
127 x 64 x 32
rgb32h52.bmp: PC bitmap, Adobe Photoshop,
127 x 64 x 32
rgba32h56.bmp: PC bitmap, Adobe Photoshop
with alpha channel mask,
127 x 64 x 32
RTDICE.BMP: PC bitmap, OS/2 1.x format,
640 x 442
strawb.bmp: PC bitmap, OS/2 1.x format,
32 x 32
diamondb.bmp: PC bitmap, OS/2 2.x format,
82 x 112 x 4,
hotspot 41x56,
cbSize 78, bits offset 142
JUR_OS2.BMP: PC bitmap, OS/2 2.x format,
640 x 400 x 4,
cbSize 78, bits offset 94
pal8os2v2-16.bmp: data
MEMSIZE-BMP.bga: OS/2 graphic array, cbSize 40; 1st
PC bitmap, OS/2 1.x format,
64 x 64
IO.EPA: data
simpsons.epa: Award BIOS Logo, 136 x 126
awardbmp.bmp: Award BIOS bitmap, 136 x 84
With --extension option i get output like:
toucan.bm: ???
coke_can.vbm: ???
oldmill.vbm: ???
winona2.vbm: ???
MARBLES-v3-.vbm: ???
MARBLES-v3-comment.vbm: ???
MARBLES-v3-rle.vbm: ???
MARBLES.PBM: pbm
rpc-org-favicon.ico: bmp
politik-digital-favicon.ico: bmp
score9.bmp: bmp
bubbles.bmp: bmp
pal8v4.bmp: ???
rgb32-xbgr.bmp: ???
rgb32h52.bmp: bmp
rgba32h56.bmp: bmp
RTDICE.BMP: ???
strawb.bmp: ???
diamondb.bmp: bmp
JUR_OS2.BMP: bmp
pal8os2v2-16.bmp: ???
MEMSIZE-BMP.bga: bmp/bga
IO.EPA: ???
simpsons.epa: ???
awardbmp.bmp: ???
For comparison reason i run the file format identification utility
TrID ( See https://mark0.net/soft-trid-e.html). This describes these
examples as "VDC BitMap (v2)" or "VDC BitMap (v3)" by definitions
bitmap-vbm.trid.xml and bitmap-vbm-v3.trid.xml (See appended
bm_trid-v.txt.gz ). It also displays used file name extensions "BM"
and "VBM" and a related URL.
That information about this bitmap file format can be found on file
formats archive team web site. This is now expressed by additional
remark lines before BMP section inside Magdir/images like:
# URL: http://fileformats.archiveteam.org/wiki/VBM_(VDC_BitMap)
# Reference: http://csbruce.com/cbm/postings/csc19950906-1.txt
According to documentation such bitmaps begin with a signature of 'B'
'M' 0xCB, followed by a version byte 2 or 3. This is similar to the
unrelated Windows BMP format.
Therefore i put displaying part inside a sub routine bitmap-vbm to
check for VDC bitmap and then display image information like version
and dimensions. This looks like:
0 name bitmap-vbm
>2 ubyte 0xCB VDC bitmap
!:mime image/x-commodore-vbm
!:ext bm/vbm
>>3 ubyte x \b, version %u
>>4 ubeshort x \b, %u
>>6 ubeshort x x %u
The version 3 variant have some more fields after starting header.
That information is shown by lines like:
>>3 ubyte =3
>>>8 ubyte 0 \b, uncompressed
>>>8 ubyte 1 \b, RLE-compressed
#>>>14 short >0 \b, reserved 0x%x
>>>16 pstring/H >0 \b, comment "%s"
On the documentation site some download links for more examples are
mentioned. Unfortunately all mentioned examples are version 2
variants. On the web site a converting tool pbmtovbm is mentioned.
Luckily i was able to generate some version 3 variants like
MARBLES-v3-rle.vbm by this tool from Netpbm PBM images as sources.
The Retro Computer Image Library (RECOIL) was able to display and
convert such bitmaps; at least for version 2 variants. This can be
can be done by a shell line like:
recoil2png -o tmp.png coke_can.vbm; file tmp.png
In current Magdir/images the identification of Windows and OS/2 BMP
bitmaps happens by lines like
0 string BM
>14 leshort 12 PC bitmap, OS/2 1.x format
!:mime image/x-ms-bmp
And later the value of variable cbSize is also displayed. That is
often size of bitmap file or sometimes the size of the bitmap header.
This was done by lines like:
>>2 ulelong x \b, cbSize %u
#>>2 ulelong x \b, cbSize 0x%x
This information is not shown for all variants. So i add such lines
for other variants. Furthermore with --extension option sometimes ???
instead bmp is displayed. So i add more lines like:
!:ext bmp
In current magic a user defined mime type "image/x-ms-bmp" is used.
Now at IANA by RFC7903 an "official" mime type is registered. This is
now expressed by a changed line like:
!:mime image/x-ms-bmp
This above fragment is replaced by the following lines:
0 string BM
>2 beshort 0xCB02
>>6 short =0
>>>0 use bitmap-bmp
>>6 short !0
>>>0 use bitmap-vmp
>2 beshort 0xCB03
>>14 short =0
>>>0 use bitmap-vbm
>>14 short !0
>>>0 use bitmap-bmp
>2 default x
>>0 use bitmap-bmp
0 name bitmap-bmp
>14 leshort 12 PC bitmap, OS/2 1.x format
!:mime image/bmp
!:ext bmp
If 2 bytes at offset two are unequal of CB02h or CB03h then image is
definitely a BMP image. This is done by "default" branch calling new
sub routine bitmap-bmp.
If 2 bytes at offset are equal CB03h it can by lucky circumstances
also be a BMP example with cbSize=????03CBh=971. So i also look at
short value at offset 14. For BMP this is low part of the DIB header
size, which has lowest value 12. For VDC bitmap this value is
described as reserved with value 0. So for value 0 call sub routine
bitmap-vbm and for non zero value call sub routine bitmap-bmp.
If 2 bytes at offset are equal CB02h it can by lucky circumstances
also be a BMP example with cbSize=????02CBh=715. So i also look at
short value at offset 6. For VDC bitmap this is the height ( positive
value) of the image. So for zero value call sub routine bitmap-bmp.
For BMP this is x coordinate of the hotspot. For windows variants
this seems to be always zero. Non zero value only occur for OS/2
variants. I hope that no such exotic OS/2 example exist.
As second test the stored DIB header size at offset 14 is checked
before displaying information. This is stored as 4 byte little endian
integer and not 2 byte integer. So i also correct this minor not
hurting error.
According to documentation eight or maybe ten variants exist. The
highest mentioned value was 124 for Windows 98/2000 and newer format
variant. But in Magdir/images there exist a section starting with
lines like:
>14 leshort 128 PC bitmap, Windows NT/2000 format
I looked back and see that this entry exist at least since version
4.26 dated about August 2008. So i delete that wrong entry.
On the other hand some OS/2 BMP 2.0 variants are missing. The variant
with DIB header size value 64 is recognized and was described by
fragment starting with line like:
>14 leshort 64 PC bitmap, OS/2 2.x format
According to Wikipedia there exist a variant with a DIB header size
of 16 like in example pal8os2v2-16.bmp of Jason Summers BMP Suite. In
this variant the header contains only the first 16 bytes of
64-variant and the remaining bytes are assumed to be zero values. So
i add like for 64-variant line starting with line like:
>14 ulelong 16 PC bitmap, OS/2 2.x format (DIB header size=16)
According to file formats archive team web site there exist variants
with DIB header size 48 and 24. Unfortunately i do not found such
examples, but i add lines to recognize such examples like:
>14 ulelong 48 PC bitmap, OS/2 2.x format (DIB header size=48)
>14 ulelong 24 PC bitmap, OS/2 2.x format (DIB header size=24)
When inspecting the cache of an old opera web browser, i found
examples where file name is ending with favicon.ico. A few of these
examples are described as "PC bitmap, Windows 3.x format". Such
examples still can be found under links like:
https://www.politi-kdigital.de/favicon.ico
http://forum.rpc1.org/favicon.ico
Information about such favourite icons (Favicon) is found for example
on Wikipedia. Typical format for such favicon is the Window ICO
format with image/x-icon MIME type. Unfortunately and not documented
there is that some sites use BMP file format and use the proposed
name favicon.ico. According to Wikipedia such favicon are samle with
dimensions like:
16×16, 32×32, 48×48, or 64×64
Most BMP examples are matched by first case and a few are matched by
second case, but i also found a few samples with dimensions like:
14x15 15x16 16x14
In current magic file after BMP files with RLE file name extensions
bitmaps (not RLE compressed and not 320x400 dimension) are handled by
fragment like:
!:ext bmp/rle
>>>>30 default x x
!:ext bmp
This now becomes like
!:ext bmp/rle
>>>>30 default x
>>>>>18 ulequad&0xffFFffC0ffFFffC0 =0 x
!:ext bmp/ico
>>>>>18 default x x
!:ext bmp
So for bitmaps with "small dimensions" like
politik-digital-favicon.ico and rpc-org-favicon.ico with --extension
option of file command "bmp/ico" is shown as file name extensions,
whereas for bitmaps with "big" dimensions ( > 64) only "bmp" is shown
as file name extension.
The file name extension "bmp" is also used for some Award BIOS
bitmaps instead of "epa". So i check such examples. These are
recognized by file command, but with --extension option only ??? is
displayed.
For comparison reason i run the file format identification utility
TrID . This describes these examples like awardbmp.bmp as "Award BIOS
logo bitmap (v2)" with mime type "image/x-award-bioslogo2" by
definition bitmap-awbm.trid.xml. It also displays used file name
extensions "BMP" and "EPA" and a related URL.
So i add at right position inside Magdir/images lines like:
!:ext epa/bmp
That information about this bitmap file format can be found on file
formats archive team web site. This is now expressed by additional
remark lines before DIB/BMP section inside Magdir/images like:
# URL: http://fileformats.archiveteam.org/wiki/Award_BIOS_logo
So the following fragment
0 string AWBM
>4 leshort <1981 Award BIOS bitmap
!:mime image/x-award-bmp
is replaced by the following lines
0 string AWBM
>4 leshort <1981 Award BIOS Logo, version 2
!:mime image/x-award-bioslogo2
!:ext epa/bmp
Furthermore one variant like in example IO.EPA is described by file
command as "data". With the help of the RECOLIL tool i was able to
verify that it is an AWARD BIOS logo. This can be can be done by a
shell line like:
recoil2png -o tmp.png IO.EPA; file tmp.png
For comparison reason i run the file format identification utility
TrID . This describes these examples as "Award BIOS logo bitmap
(128x126)" with mime type "image/x-award-bioslogo" by definition
bitmap-awbm-v1x1009.trid.xml.. It also displays used file name
extensions and the related URL. So i add at right position inside
Magdir/images in same manner as for other Award BIOS logo lines like:
0 string \x10\x09 Award BIOS Logo, 128 x 126
!:mime image/x-award-bioslogo
!:ext epa
The correct logo looking and dimensions can be verified by mentioned
graphic tool XnView or the command line tool by shell line like:
nconvert -fullinfo *.EPA
After applying the above mentioned modifications by patches
file-5.40-images-epa.diff file-5.40-images-vbm.diff
file-5.40-images-dib128.diff file-5.40-images-dib108.diff
file-5.40-images-dib40.diff file-5.40-images-dib56.diff
file-5.40-images-dib52.diff file-5.40-images-dib16-64.diff
file-5.40-images-dib12.diff ( or all summerized by
file-5.40-images-BMp-ALL.diff ) then such bitmaps are now described like:
toucan.bm: VDC bitmap, version 2, 640 x 480
coke_can.vbm: VDC bitmap, version 2, 227 x 425
oldmill.vbm: VDC bitmap, version 2, 1024 x 768
winona2.vbm: VDC bitmap, version 2, 385 x 480
MARBLES-v3-.vbm: VDC bitmap, version 3, 1152 x 813,
uncompressed
MARBLES-v3-comment.vbm: VDC bitmap, version 3, 1152 x 813,
uncompressed,
comment "This is a comment!"
MARBLES-v3-rle.vbm: VDC bitmap, version 3, 1152 x 813,
RLE-compressed
MARBLES.PBM: Netpbm image data, size = 1152 x 813
, rawbits, bitmap
rpc-org-favicon.ico: PC bitmap, Windows 3.x format,
16 x 16 x 24,
resolution 3780 x 3780 px/m,
cbSize 822, bits offset 54
politik-digital-favicon.ico: PC bitmap, Windows 3.x format,
15 x 16 x 8,
resolution 2834 x 2834 px/m,
cbSize 1336, bits offset 1078
score9.bmp: PC bitmap, Windows 3.x format,
32 x 32 x 8,
resolution 5333 x 5333 px/m,
cbSize 54, bits offset 1078
bubbles.bmp: PC bitmap, Windows 3.x format,
64 x 64 x 4, image size 2048,
resolution 2835 x 2835 px/m,
4 important colors,
cbSize 2118, bits offset 70
pal8v4.bmp: PC bitmap, Windows 95/NT4
and newer format,
127 x 64 x 8
, cbSize 9322, bits offset 1130
rgb32-xbgr.bmp: PC bitmap, Windows 98/2000
and newer format,
127 x 64 x 32,
cbSize 32650, bits offset 138
rgb32h52.bmp: PC bitmap, Adobe Photoshop,
127 x 64 x 32
, cbSize 32578, bits offset 66
rgba32h56.bmp: PC bitmap, Adobe Photoshop
with alpha channel mask,
127 x 64 x 32
, cbSize 32582, bits offset 70
RTDICE.BMP: PC bitmap, OS/2 1.x format,
640 x 442 x 4
, hotspot 1087x35016
, cbSize 141512, bits offset 72
strawb.bmp: PC bitmap, OS/2 1.x format,
32 x 32 x 8
, cbSize 26, bits offset 794
diamondb.bmp: PC bitmap, OS/2 2.x format,
82 x 112 x 4,
hotspot 41x56,
cbSize 78, bits offset 142
JUR_OS2.BMP: PC bitmap, OS/2 2.x format,
640 x 400 x 4,
cbSize 78, bits offset 94
pal8os2v2-16.bmp: PC bitmap, OS/2 2.x format
(DIB header size=16),
127 x 64 x 8,
cbSize 9246, bits offset 1054
MEMSIZE-BMP.bga: OS/2 graphic array, cbSize 40; 1st
PC bitmap, OS/2 1.x format,
64 x 64 x 4
, hotspot 32x32
, cbSize 26, bits offset 88
IO.EPA: Award BIOS Logo, 128 x 126
simpsons.epa: Award BIOS Logo, 136 x 126
awardbmp.bmp: Award BIOS Logo, version 2, 136 x 84
And with --extension option now used file name extensions are shown like:
toucan.bm: bm/vbm
coke_can.vbm: bm/vbm
oldmill.vbm: bm/vbm
winona2.vbm: bm/vbm
MARBLES-v3-.vbm: bm/vbm
MARBLES-v3-comment.vbm: bm/vbm
MARBLES-v3-rle.vbm: bm/vbm
MARBLES.PBM: pbm
rpc-org-favicon.ico: bmp/ico
politik-digital-favicon.ico: bmp/ico
score9.bmp: bmp/ico
bubbles.bmp: bmp
pal8v4.bmp: bmp
rgb32-xbgr.bmp: bmp
rgb32h52.bmp: bmp
rgba32h56.bmp: bmp
RTDICE.BMP: bmp
strawb.bmp: bmp
diamondb.bmp: bmp
JUR_OS2.BMP: bmp
pal8os2v2-16.bmp: bmp
MEMSIZE-BMP.bga: bmp/bga
IO.EPA: epa
simpsons.epa: epa
awardbmp.bmp: epa/bmp
I hope my diff files can be applied in future version of file utility.
With best wishes
Jörg Jenderek
--
Jörg Jenderek
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-------------- next part --------------
--- file-5.40/magic/Magdir/images.old 2021-02-22 23:49:24 +0000
+++ file-5.40/magic/Magdir/images 2021-05-02 20:20:59 +0000
@@ -625,9 +625,18 @@
# From: Joerg Jenderek <joerg.jen.der.ek at gmx.net>
-# most files with the extension .EPA and some with .BMP
+# URL: http://fileformats.archiveteam.org/wiki/Award_BIOS_logo
+# Note: verified by XnView command `nconvert -fullinfo *.EPA`
0 string \x11\x06 Award BIOS Logo, 136 x 84
!:mime image/x-award-bioslogo
+!:ext epa
0 string \x11\x09 Award BIOS Logo, 136 x 126
!:mime image/x-award-bioslogo
+!:ext epa
+# https://telparia.com/fileFormatSamples/image/epa/IO.EPA
+# Note: by bitmap-awbm-v1x1009.trid.xml called "Award BIOS logo bitmap (128x126) (v1)"
+# verfied by RECOIL `recoil2png -o tmp.png IO.EPA; file tmp.png`
+0 string \x10\x09 Award BIOS Logo, 128 x 126
+!:mime image/x-award-bioslogo
+!:ext epa
#0 string \x07\x1f BIOS Logo corrupted?
# http://www.blackfiveservices.co.uk/awbmtools.shtml
@@ -635,6 +644,10 @@
# http://biosgfx.narod.ru/abr-2/
0 string AWBM
->4 leshort <1981 Award BIOS bitmap
-!:mime image/x-award-bmp
+# Note: by bitmap-awbm.trid.xml called "Award BIOS logo bitmap (v2)"
+>4 leshort <1981 Award BIOS Logo, version 2
+#>4 leshort <1981 Award BIOS bitmap
+!:mime image/x-award-bioslogo2
+#!:mime image/x-award-bmp
+!:ext epa/bmp
# image width is a multiple of 4
>>4 leshort&0x0003 0
-------------- next part --------------
--- file-5.40/magic/Magdir/images.old 2021-02-22 23:49:24 +0000
+++ file-5.40/magic/Magdir/images 2021-05-02 20:26:15 +0000
@@ -681,2 +681,37 @@
>>36 ulelong >0 \b, %u important colors
+# From: Joerg Jenderek
+# URL: http://fileformats.archiveteam.org/wiki/VBM_(VDC_BitMap)
+# Reference: http://csbruce.com/cbm/postings/csc19950906-1.txt
+# http://mark0.net/download/triddefs_xml.7z
+# defs/b/bitmap-vbm.trid.xml
+# defs/b/bitmap-vbm-v3.trid.xml
+# Note: called "VDC BitMap" by TrID
+# verified by RECOIL `recoil2png -o tmp.png coke_can.vbm; file tmp.png`
+# begin with a signature of 'B' 'M' 0xCB, followed by a version byte 2 or 3
+# Similar to the unrelated Windows BMP format
+# check for VDC bitmap and then display image dimension and version
+0 name bitmap-vbm
+>2 ubyte 0xCB VDC bitmap
+!:mime image/x-commodore-vbm
+# http://recoil.sourceforge.net/formats.html
+!:ext bm/vbm
+# the VBM format version number: 2 or 3
+>>3 ubyte x \b, version %u
+# width of the image in Hi/Lo format
+>>4 ubeshort x \b, %u
+# height of the image
+>>6 ubeshort x x %u
+# version 3 images have the following additional header information
+>>3 ubyte =3
+# data-encoding type: 0~uncompressed 1~RLE-compressed
+>>>8 ubyte 0 \b, uncompressed
+>>>8 ubyte 1 \b, RLE-compressed
+# byte code for general RLE repetitions
+#>>>9 ubyte x \b, RLE repetition code 0x%x
+# reserved := 0
+#>>>14 short >0 \b, reserved 0x%x
+# length of comment text; 0~no comment text
+#>>>16 ubeshort >0 \b, comment length %u
+>>>16 pstring/H >0 \b, comment "%s"
+#
0 string BM
-------------- next part --------------
--- file-5.40/magic/Magdir/images.old 2021-02-22 23:49:24 +0000
+++ file-5.40/magic/Magdir/images 2021-05-02 20:32:53 +0000
@@ -775,9 +775,4 @@
>>22 lelong x %d x
>>28 leshort x %d
->14 leshort 128 PC bitmap, Windows NT/2000 format
-!:mime image/x-ms-bmp
->>18 lelong x \b, %d x
->>22 lelong x %d x
->>28 leshort x %d
# Update: Joerg Jenderek
# URL: http://fileformats.archiveteam.org/wiki/OS/2_Icon
-------------- next part --------------
--- file-5.40/magic/Magdir/images.old 2021-02-22 23:49:24 +0000
+++ file-5.40/magic/Magdir/images 2021-05-02 23:41:54 +0000
@@ -771,6 +771,8 @@
>>28 leshort x %d
->14 leshort 108 PC bitmap, Windows 95/NT4 and newer format
-!:mime image/x-ms-bmp
+>14 lelong 108 PC bitmap, Windows 95/NT4 and newer format
+!:mime image/bmp
+!:ext bmp
>>18 lelong x \b, %d x
>>22 lelong x %d x
+# number of bits per pixel (color depth); found 8 24 32
>>28 leshort x %d
@@ -781,2 +783,11 @@
>>28 leshort x %d
+# x, y coordinates of the hotspot; should be zero for Windows variant
+>>6 leshort >0 \b, hotspot %ux
+>>>8 leshort x \b%u
+# cbSize; size of file like: 82 8A 9A 9F86 1E07A 3007A 88B7A C007A
+>>2 ulelong x \b, cbSize %u
+#>>2 ulelong x \b, cbSize 0x%x
+# offBits; offset to bitmap data like: 7A 7E 46A
+>>10 ulelong x \b, bits offset %u
+#>>10 ulelong x \b, bits offset 0x%x
# Update: Joerg Jenderek
-------------- next part --------------
--- file-5.40/magic/Magdir/images.old 2021-02-22 23:49:24 +0000
+++ file-5.40/magic/Magdir/images 2021-05-02 23:47:21 +0000
@@ -724,8 +724,8 @@
# jump 4 bytes before end of file/header to skip fmt-116-signature-id-118.dib
# broken for large bitmaps
#>>(2.l-4) ulong x PC bitmap, Windows 3.x format
->>14 leshort 40 PC bitmap, Windows 3.x format
-!:mime image/x-ms-bmp
+>>14 lelong 40 PC bitmap, Windows 3.x format
+!:mime image/bmp
!:apple ????BMPp
>>>18 lelong x \b, %d x
>>>22 lelong x %d
@@ -736,7 +736,16 @@
# compression method 2~RLE 4-bit/pixel implies also extension rle
>>>>30 ulelong 2 x
!:ext bmp/rle
->>>>30 default x x
+# not RLE compressed and not 320x400 dimension
+>>>>30 default x
+# "small" dimensions like: 14x15 15x16 16x14 16x16 32x32
+# https://en.wikipedia.org/wiki/Favicon
+>>>>>18 ulequad&0xffFFffC0ffFFffC0 =0 x
+# https://www.politi-kdigital.de/favicon.ico
+# http://forum.rpc1.org/favicon.ico
+!:ext bmp/ico
+# "big" dimensions > 63
+>>>>>18 default x x
!:ext bmp
# number of bits per pixel (color depth); found 1 2 4 8 16 24 32
>>>28 leshort x %d
-------------- next part --------------
--- file-5.40/magic/Magdir/images.old 2021-02-22 23:49:24 +0000
+++ file-5.40/magic/Magdir/images 2021-05-02 23:53:00 +0000
@@ -713,14 +713,24 @@
>>22 lelong x %d x
>>28 leshort x %d
# BITMAPV3INFOHEADER adds alpha channel bit mask
->14 leshort 56 PC bitmap, Adobe Photoshop with alpha channel mask
-!:mime image/x-ms-bmp
+>14 lelong 56 PC bitmap, Adobe Photoshop with alpha channel mask
+!:mime image/bmp
!:apple ????BMPp
!:ext bmp
>>18 lelong x \b, %d x
>>22 lelong x %d x
+# number of bits per pixel (color depth); found 16 32
>>28 leshort x %d
->14 leshort 40
+# x, y coordinates of the hotspot; should be zero for Windows variant
+>>6 uleshort >0 \b, hotspot %ux
+>>>8 uleshort x \b%u
+# cbSize; size of file like: 4E 7F46 131DE 14046h
+>>2 ulelong x \b, cbSize %u
+#>>2 ulelong x \b, cbSize 0x%x
+# offBits; offset to bitmap data like: 46h
+>>10 ulelong x \b, bits offset %u
+#>>10 ulelong x \b, bits offset 0x%x
+>14 lelong 40
# jump 4 bytes before end of file/header to skip fmt-116-signature-id-118.dib
# broken for large bitmaps
#>>(2.l-4) ulong x PC bitmap, Windows 3.x format
-------------- next part --------------
--- file-5.40/magic/Magdir/images.old 2021-02-22 23:49:24 +0000
+++ file-5.40/magic/Magdir/images 2021-05-02 23:57:16 +0000
@@ -707,4 +707,4 @@
# BITMAPV2INFOHEADER adds RGB bit masks
->14 leshort 52 PC bitmap, Adobe Photoshop
-!:mime image/x-ms-bmp
+>14 lelong 52 PC bitmap, Adobe Photoshop
+!:mime image/bmp
!:apple ????BMPp
@@ -713,3 +713,13 @@
>>22 lelong x %d x
+# number of bits per pixel (color depth); found 16 32
>>28 leshort x %d
+# x, y coordinates of the hotspot; should be zero for Windows variant
+>>6 uleshort >0 \b, hotspot %ux
+>>>8 uleshort x \b%u
+# cbSize; size of file like: 14A 7F42
+>>2 ulelong x \b, cbSize %u
+#>>2 ulelong x \b, cbSize 0x%x
+# offBits; offset to bitmap data like: 42h
+>>10 ulelong x \b, bits offset %u
+#>>10 ulelong x \b, bits offset 0x%x
# BITMAPV3INFOHEADER adds alpha channel bit mask
-------------- next part --------------
--- file-5.40/magic/Magdir/images.old 2021-02-22 23:49:24 +0000
+++ file-5.40/magic/Magdir/images 2021-05-03 00:04:05 +0000
@@ -686,4 +686,29 @@
>>20 leshort x %d
->14 leshort 64 PC bitmap, OS/2 2.x format
-!:mime image/x-ms-bmp
+# http://fileformats.archiveteam.org/wiki/BMP#OS.2F2_BMP_2.0 no examples found
+>14 ulelong 48 PC bitmap, OS/2 2.x format (DIB header size=48)
+>14 ulelong 24 PC bitmap, OS/2 2.x format (DIB header size=24)
+# http://entropymine.com/jason/bmpsuite/bmpsuite/q/pal8os2v2-16.bmp
+# Note: by bitmap-bmp-v2o.trid.xml called "Windows Bitmap (v2o)"
+>14 ulelong 16 PC bitmap, OS/2 2.x format (DIB header size=16)
+!:mime image/bmp
+!:apple ????BMPp
+!:ext bmp
+# image width and height fields are unsigned integers for OS/2
+>>18 ulelong x \b, %u x
+>>22 ulelong x %u
+# number of bits per pixel (color depth); found 8
+>>28 uleshort >1 x %u
+# x, y coordinates of the hotspot
+>>6 uleshort >0 \b, hotspot %ux
+>>>8 uleshort x \b%u
+# number of color planes (must be 1)
+#>>26 uleshort >1 \b, %u color planes
+# cbSize; size of file like: 241E
+>>2 ulelong x \b, cbSize %u
+#>>2 ulelong x \b, cbSize 0x%x
+# offBits; offset to bitmap data like: 41E
+>>10 ulelong x \b, bits offset %u
+#>>10 ulelong x \b, bits offset 0x%x
+>14 lelong 64 PC bitmap, OS/2 2.x format
+!:mime image/bmp
!:apple ????BMPp
@@ -701,2 +726,3 @@
>>2 ulelong x \b, cbSize %u
+# BMP with cbSize 000002CBh=715 or 000003CBh=971 maybe misinterpreted as VDC bitmap
#>>2 ulelong x \b, cbSize 0x%x
-------------- next part --------------
--- file-5.40/magic/Magdir/images.old 2021-02-22 23:49:24 +0000
+++ file-5.40/magic/Magdir/images 2021-05-03 00:09:42 +0000
@@ -682,4 +682,24 @@
0 string BM
->14 leshort 12 PC bitmap, OS/2 1.x format
-!:mime image/x-ms-bmp
+# check for magic and version 2 of VDC bitmap or BMP with cbSize=715=CB02
+>2 beshort 0xCB02
+>>6 short =0
+>>>0 use bitmap-bmp
+# VDC bitmap height or maybe a few OS/2 BMP with nonzero "hotspot coordinates"
+>>6 short !0
+>>>0 use bitmap-vbm
+# check for magic and version 3 of VDC bitmap or BMP with cbSize=971=CB03
+>2 beshort 0xCB03
+# check for reserved value (=0) of VDC bitmap
+>>14 short =0
+>>>0 use bitmap-vbm
+# BMP with cbSize=????03CBh and dib header size != 0
+>>14 short !0
+>>>0 use bitmap-bmp
+# cbSize is size of header or file size of Windows BMP bitmap
+>2 default x
+>>0 use bitmap-bmp
+0 name bitmap-bmp
+>14 lelong 12 PC bitmap, OS/2 1.x format
+!:mime image/bmp
+!:ext bmp
>>18 leshort x \b, %d x
-------------- next part --------------
--- file-5.40/magic/Magdir/images.old 2021-02-22 23:49:24 +0000
+++ file-5.40/magic/Magdir/images 2021-05-02 23:30:55 +0000
@@ -622,22 +622,35 @@
>29 byte 1 \b, fine resolution (204x196 DPI)
# From: Herbert Rosmanith <herp at wildsau.idv.uni.linz.at>
0 string Sfff structured fax file
# From: Joerg Jenderek <joerg.jen.der.ek at gmx.net>
-# most files with the extension .EPA and some with .BMP
+# URL: http://fileformats.archiveteam.org/wiki/Award_BIOS_logo
+# Note: verified by XnView command `nconvert -fullinfo *.EPA`
0 string \x11\x06 Award BIOS Logo, 136 x 84
!:mime image/x-award-bioslogo
+!:ext epa
0 string \x11\x09 Award BIOS Logo, 136 x 126
!:mime image/x-award-bioslogo
+!:ext epa
+# https://telparia.com/fileFormatSamples/image/epa/IO.EPA
+# Note: by bitmap-awbm-v1x1009.trid.xml called "Award BIOS logo bitmap (128x126) (v1)"
+# verfied by RECOIL `recoil2png -o tmp.png IO.EPA; file tmp.png`
+0 string \x10\x09 Award BIOS Logo, 128 x 126
+!:mime image/x-award-bioslogo
+!:ext epa
#0 string \x07\x1f BIOS Logo corrupted?
# http://www.blackfiveservices.co.uk/awbmtools.shtml
# http://biosgfx.narod.ru/v3/
# http://biosgfx.narod.ru/abr-2/
0 string AWBM
->4 leshort <1981 Award BIOS bitmap
-!:mime image/x-award-bmp
+# Note: by bitmap-awbm.trid.xml called "Award BIOS logo bitmap (v2)"
+>4 leshort <1981 Award BIOS Logo, version 2
+#>4 leshort <1981 Award BIOS bitmap
+!:mime image/x-award-bioslogo2
+#!:mime image/x-award-bmp
+!:ext epa/bmp
# image width is a multiple of 4
>>4 leshort&0x0003 0
>>>4 leshort x \b, %d
>>>6 leshort x x %d
>>4 leshort&0x0003 >0 \b,
@@ -677,17 +690,109 @@
>>>28 lelong x %d px/m
# number of colors in palette, or 0 to default to 2**n
#>>32 ulelong >0 \b, %u colors
# number of important colors used, or 0 when every color is important
>>36 ulelong >0 \b, %u important colors
+# From: Joerg Jenderek
+# URL: http://fileformats.archiveteam.org/wiki/VBM_(VDC_BitMap)
+# Reference: http://csbruce.com/cbm/postings/csc19950906-1.txt
+# http://mark0.net/download/triddefs_xml.7z
+# defs/b/bitmap-vbm.trid.xml
+# defs/b/bitmap-vbm-v3.trid.xml
+# Note: called "VDC BitMap" by TrID
+# verified by RECOIL `recoil2png -o tmp.png coke_can.vbm; file tmp.png`
+# begin with a signature of 'B' 'M' 0xCB, followed by a version byte 2 or 3
+# Similar to the unrelated Windows BMP format
+# check for VDC bitmap and then display image dimension and version
+0 name bitmap-vbm
+>2 ubyte 0xCB VDC bitmap
+!:mime image/x-commodore-vbm
+# http://recoil.sourceforge.net/formats.html
+!:ext bm/vbm
+# the VBM format version number: 2 or 3
+>>3 ubyte x \b, version %u
+# width of the image in Hi/Lo format
+>>4 ubeshort x \b, %u
+# height of the image
+>>6 ubeshort x x %u
+# version 3 images have the following additional header information
+>>3 ubyte =3
+# data-encoding type: 0~uncompressed 1~RLE-compressed
+>>>8 ubyte 0 \b, uncompressed
+>>>8 ubyte 1 \b, RLE-compressed
+# byte code for general RLE repetitions
+#>>>9 ubyte x \b, RLE repetition code 0x%x
+# reserved := 0
+#>>>14 short >0 \b, reserved 0x%x
+# length of comment text; 0~no comment text
+#>>>16 ubeshort >0 \b, comment length %u
+>>>16 pstring/H >0 \b, comment "%s"
+#
0 string BM
->14 leshort 12 PC bitmap, OS/2 1.x format
-!:mime image/x-ms-bmp
+# check for magic and version 2 of VDC bitmap or BMP with cbSize=715=CB02
+>2 beshort 0xCB02
+>>6 short =0
+>>>0 use bitmap-bmp
+# VDC bitmap height or maybe a few OS/2 BMP with nonzero "hotspot coordinates"
+>>6 short !0
+>>>0 use bitmap-vbm
+# check for magic and version 3 of VDC bitmap or BMP with cbSize=971=CB03
+>2 beshort 0xCB03
+# check for reserved value (=0) of VDC bitmap
+>>14 short =0
+>>>0 use bitmap-vbm
+# BMP with cbSize=????03CBh and dib header size != 0
+>>14 short !0
+>>>0 use bitmap-bmp
+# cbSize is size of header or file size of Windows BMP bitmap
+>2 default x
+>>0 use bitmap-bmp
+0 name bitmap-bmp
+>14 lelong 12 PC bitmap, OS/2 1.x format
+!:mime image/bmp
+!:ext bmp
>>18 leshort x \b, %d x
>>20 leshort x %d
->14 leshort 64 PC bitmap, OS/2 2.x format
-!:mime image/x-ms-bmp
+# number of color planes (must be 1)
+#>>22 leshort !1 \b, %u color planes
+# number of bits per pixel (color depth); found 4 8
+>>24 leshort x x %d
+# x, y coordinates of the hotspot
+>>6 uleshort >0 \b, hotspot %ux
+>>>8 uleshort x \b%u
+# cbSize; size of file or header like 1Ah 228C8h
+>>2 ulelong x \b, cbSize %u
+#>>2 ulelong x \b, cbSize 0x%8.8x
+# offBits; offset to bitmap data like:
+>>10 ulelong x \b, bits offset %u
+# http://fileformats.archiveteam.org/wiki/BMP#OS.2F2_BMP_2.0 no examples found
+>14 ulelong 48 PC bitmap, OS/2 2.x format (DIB header size=48)
+>14 ulelong 24 PC bitmap, OS/2 2.x format (DIB header size=24)
+# http://entropymine.com/jason/bmpsuite/bmpsuite/q/pal8os2v2-16.bmp
+# Note: by bitmap-bmp-v2o.trid.xml called "Windows Bitmap (v2o)"
+>14 ulelong 16 PC bitmap, OS/2 2.x format (DIB header size=16)
+!:mime image/bmp
+!:apple ????BMPp
+!:ext bmp
+# image width and height fields are unsigned integers for OS/2
+>>18 ulelong x \b, %u x
+>>22 ulelong x %u
+# number of bits per pixel (color depth); found 8
+>>28 uleshort >1 x %u
+# x, y coordinates of the hotspot
+>>6 uleshort >0 \b, hotspot %ux
+>>>8 uleshort x \b%u
+# number of color planes (must be 1)
+#>>26 uleshort >1 \b, %u color planes
+# cbSize; size of file like: 241E
+>>2 ulelong x \b, cbSize %u
+#>>2 ulelong x \b, cbSize 0x%x
+# offBits; offset to bitmap data like: 41E
+>>10 ulelong x \b, bits offset %u
+#>>10 ulelong x \b, bits offset 0x%x
+>14 lelong 64 PC bitmap, OS/2 2.x format
+!:mime image/bmp
!:apple ????BMPp
!:ext bmp
# image width and height fields are unsigned integers for OS/2
>>18 ulelong x \b, %u x
>>22 ulelong x %u
@@ -697,48 +802,78 @@
>>6 uleshort >0 \b, hotspot %ux
>>>8 uleshort x \b%u
>>26 uleshort >1 \b, %u color planes
# cbSize; size of file or headers
>>2 ulelong x \b, cbSize %u
+# BMP with cbSize 000002CBh=715 or 000003CBh=971 maybe misinterpreted as VDC bitmap
#>>2 ulelong x \b, cbSize 0x%x
# offBits; offset to bitmap data like 56h 5Eh 8Eh 43Eh
>>10 ulelong x \b, bits offset %u
#>>10 ulelong x \b, bits offset 0x%x
#>>(10.l) ubequad !0 \b, bits 0x%16.16llx
# BITMAPV2INFOHEADER adds RGB bit masks
->14 leshort 52 PC bitmap, Adobe Photoshop
-!:mime image/x-ms-bmp
+>14 lelong 52 PC bitmap, Adobe Photoshop
+!:mime image/bmp
!:apple ????BMPp
!:ext bmp
>>18 lelong x \b, %d x
>>22 lelong x %d x
+# number of bits per pixel (color depth); found 16 32
>>28 leshort x %d
+# x, y coordinates of the hotspot; should be zero for Windows variant
+>>6 uleshort >0 \b, hotspot %ux
+>>>8 uleshort x \b%u
+# cbSize; size of file like: 14A 7F42
+>>2 ulelong x \b, cbSize %u
+#>>2 ulelong x \b, cbSize 0x%x
+# offBits; offset to bitmap data like: 42h
+>>10 ulelong x \b, bits offset %u
+#>>10 ulelong x \b, bits offset 0x%x
# BITMAPV3INFOHEADER adds alpha channel bit mask
->14 leshort 56 PC bitmap, Adobe Photoshop with alpha channel mask
-!:mime image/x-ms-bmp
+>14 lelong 56 PC bitmap, Adobe Photoshop with alpha channel mask
+!:mime image/bmp
!:apple ????BMPp
!:ext bmp
>>18 lelong x \b, %d x
>>22 lelong x %d x
+# number of bits per pixel (color depth); found 16 32
>>28 leshort x %d
->14 leshort 40
+# x, y coordinates of the hotspot; should be zero for Windows variant
+>>6 uleshort >0 \b, hotspot %ux
+>>>8 uleshort x \b%u
+# cbSize; size of file like: 4E 7F46 131DE 14046h
+>>2 ulelong x \b, cbSize %u
+#>>2 ulelong x \b, cbSize 0x%x
+# offBits; offset to bitmap data like: 46h
+>>10 ulelong x \b, bits offset %u
+#>>10 ulelong x \b, bits offset 0x%x
+>14 lelong 40
# jump 4 bytes before end of file/header to skip fmt-116-signature-id-118.dib
# broken for large bitmaps
#>>(2.l-4) ulong x PC bitmap, Windows 3.x format
->>14 leshort 40 PC bitmap, Windows 3.x format
-!:mime image/x-ms-bmp
+>>14 lelong 40 PC bitmap, Windows 3.x format
+!:mime image/bmp
!:apple ????BMPp
>>>18 lelong x \b, %d x
>>>22 lelong x %d
# 320 x 400 https://en.wikipedia.org/wiki/LOGO.SYS
>>>18 ulequad =0x0000019000000140 x
!:ext bmp/sys
>>>18 ulequad !0x0000019000000140
# compression method 2~RLE 4-bit/pixel implies also extension rle
>>>>30 ulelong 2 x
!:ext bmp/rle
->>>>30 default x x
+# not RLE compressed and not 320x400 dimension
+>>>>30 default x
+# "small" dimensions like: 14x15 15x16 16x14 16x16 32x32
+# https://en.wikipedia.org/wiki/Favicon
+>>>>>18 ulequad&0xffFFffC0ffFFffC0 =0 x
+# https://www.politi-kdigital.de/favicon.ico
+# http://forum.rpc1.org/favicon.ico
+!:ext bmp/ico
+# "big" dimensions > 63
+>>>>>18 default x x
!:ext bmp
# number of bits per pixel (color depth); found 1 2 4 8 16 24 32
>>>28 leshort x %d
# x, y coordinates of the hotspot; there is no hotspot in bitmaps, so values 0
#>>>6 uleshort >0 \b, hotspot %ux
@@ -762,25 +897,44 @@
#>>>2 ulelong x \b, cbSize 0x%x
# offBits; offset to bitmap data like 36h 76h BEh 236h 406h 436h 4E6h
>>>10 ulelong x \b, bits offset %u
#>>>10 ulelong x \b, bits offset 0x%x
#>>>(10.l) ubequad !0 \b, bits 0x%16.16llxd
->14 leshort 124 PC bitmap, Windows 98/2000 and newer format
-!:mime image/x-ms-bmp
->>18 lelong x \b, %d x
->>22 lelong x %d x
->>28 leshort x %d
->14 leshort 108 PC bitmap, Windows 95/NT4 and newer format
-!:mime image/x-ms-bmp
+>14 lelong 124 PC bitmap, Windows 98/2000 and newer format
+!:mime image/bmp
+!:ext bmp
>>18 lelong x \b, %d x
>>22 lelong x %d x
+# color planes; must be 1
+#>>>26 uleshort >1 \b, %u color planes
+# number of bits per pixel (color depth); found 4 8 16 24 32 1 (fmt-119-signature-id-121.bmp) 0 (rgb24jpeg.bmp rgb24png.bmp)
>>28 leshort x %d
->14 leshort 128 PC bitmap, Windows NT/2000 format
-!:mime image/x-ms-bmp
+# x, y coordinates of the hotspot; should be zero for Windows variant
+>>6 leshort >0 \b, hotspot %ux
+>>>8 leshort x \b%u
+# cbSize; size of file like: 8E AA 48A 999 247A 4F02 7F8A 3F88E B216E 1D4C8A 100008A
+>>2 ulelong x \b, cbSize %u
+#>>2 ulelong x \b, cbSize 0x%x
+# offBits; offset to bitmap data like: 8A 47A ABABABAB (fmt-119-signature-id-121.bmp)
+>>10 ulelong x \b, bits offset %u
+#>>10 ulelong x \b, bits offset 0x%x
+>14 lelong 108 PC bitmap, Windows 95/NT4 and newer format
+!:mime image/bmp
+!:ext bmp
>>18 lelong x \b, %d x
>>22 lelong x %d x
+# number of bits per pixel (color depth); found 8 24 32
>>28 leshort x %d
+# x, y coordinates of the hotspot; should be zero for Windows variant
+>>6 leshort >0 \b, hotspot %ux
+>>>8 leshort x \b%u
+# cbSize; size of file like: 82 8A 9A 9F86 1E07A 3007A 88B7A C007A
+>>2 ulelong x \b, cbSize %u
+#>>2 ulelong x \b, cbSize 0x%x
+# offBits; offset to bitmap data like: 7A 7E 46A
+>>10 ulelong x \b, bits offset %u
+#>>10 ulelong x \b, bits offset 0x%x
# Update: Joerg Jenderek
# URL: http://fileformats.archiveteam.org/wiki/OS/2_Icon
# Reference: http://www.fileformat.info
# /format/os2bmp/spec/902d5c253f2a43ada39c2b81034f27fd/view.htm
# Note: verified by command like `deark -l -d3 OS2MEMU.ICO`
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