BMP - Revision history

Dexvertbot: /* Various */

2023-12-28T04:20:52Z

‎Various

2023-11-08T16:16:11Z

‎See also

2023-10-12T11:28:16Z

‎Software: Reggae

2023-09-01T14:33:21Z

‎See also

2023-01-05T15:06:12Z

‎See also

2022-12-27T15:37:11Z

‎Links

2022-02-09T19:05:46Z

‎See also

2021-04-16T04:20:01Z

add note about negative height

2021-04-14T19:47:39Z

2020-10-26T01:06:29Z

add ForensicsWiki entry link (no useful details to add)

@@ Line 244: / Line 244: @@
 * [https://archive.org/details/OS2BBS OS/2 BBS Files Archive] → 13-Bitmap.zip - Lots of OS/2 BMP 1.0 & 2.0 files
 * [https://entropymine.com/jason/bmpsuite/bmpsuite/html/bmpsuite.html BMP Suite Image List]
-* https://telparia.com/fileFormatSamples/image/bmp/
+* {{DexvertSamples|image/bmp}}
 == See also ==

@@ Line 247: / Line 247: @@
 == See also ==
 * [[CUR]]
 * [[ICO]]
 * [[KQP]]
 * [[OS/2 bitmap family]]
@@ Line 261: / Line 259: @@
 * [[Windows DDB]]
 * [[Winzle Puzzle]]
 == Links ==

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 * [[XnView]]
 * [[Tom's Viewer]]
 == Sample files ==

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 == See also ==
 * [[CUR]]
 * [[ICO]]
 * [[KQP]]
 * [[OS/2 bitmap family]]

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 * [[OS/2 Bitmap Array]]
 * [[packPNM]]
 * [[Pocket PC Bitmap]]
 * [[Poser Bump Map]]

@@ Line 264: / Line 264: @@
 * [http://coptr.digipres.org/Bad_Peggy Bad Peggy: scans images for problems]
 * [https://web.archive.org/web/20190919034602/http://forensicswiki.org/wiki/BMP ForensicsWiki entry] (not much useful info except for a link to an iOS tool for reading metadata)
 [[Category:Microsoft]]
 [[Category:Windows]]
 [[Category:OS/2]]

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 The pixel data is pointed to by a field in BITMAPFILEHEADER. There can be other data segments, e.g. for a color palette, before (and, rarely, after) the pixel data.
-Pixel data is usually stored from bottom up. If uncompressed, each row is padded to a multiple of 4 bytes.
+Pixel data is usually stored from bottom up (but is top-down if the header indicates a negative height). If uncompressed, each row is padded to a multiple of 4 bytes.
 == Identifiers ==

@@ Line 76: / Line 76: @@
 Windows CE also extended it, for example to allow 2 bits/pixel (see [[Pocket PC Bitmap]]), but its extensions were not migrated to the BMP v4 and v5 formats.
 It is apparently possible for OS/2 BMP 2.0 format to masquerade as Windows BMP v3. The upshot is that if the compression type is 3 and the bit depth is 1, or the compression type is 4 and the bit depth is 24, then the file should be treated as OS/2 BMP 2.0.
@@ Line 204: / Line 206: @@
 * [http://www.digicamsoft.com/bmp/bmp.html Another site with format descriptions]
 * [http://www.fileformat.info/format/os2bmp/spec/902d5c253f2a43ada39c2b81034f27fd/view.htm OS/2 Presentation Manager Programming Reference Guide, Vol III]
 == Metaformat files ==
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 * [[Winzle Puzzle]]
-== Resources ==
+== Links ==
-* [http://whatis.rest7.com/how-to-open-bmp-file Specification of BMP headers]
 * [[Wikipedia:BMP file format|Wikipedia: BMP file format]]
 * {{EGFF|bmp|Microsoft Windows Bitmap File Format Summary}}, from the [[Encyclopedia of Graphics File Formats]]
 * {{EGFF|os2bmp|OS/2 Bitmap File Format Summary}}, from the [[Encyclopedia of Graphics File Formats]]
 * [http://coptr.digipres.org/Bad_Peggy Bad Peggy: scans images for problems]
 * [https://web.archive.org/web/20190919034602/http://forensicswiki.org/wiki/BMP ForensicsWiki entry] (not much useful info except for a link to an iOS tool for reading metadata)