Windows DDB - Revision history

Jsummers at 15:58, 4 June 2019

2019-06-04T15:58:17Z

Jsummers: /* Format */

2018-02-22T15:59:00Z

‎Format

Jsummers at 13:57, 20 January 2018

2018-01-20T13:57:46Z

John e at 00:30, 6 April 2017

2017-04-06T00:30:58Z

John e at 00:30, 6 April 2017

2017-04-06T00:30:30Z

Jsummers: Category:Windows

2017-03-29T20:56:36Z

Category:Windows

Jsummers: Created page with "{{FormatInfo |formattype=electronic |subcat=Graphics |extensions={{ext|ddb}}, {{ext|bmp}} |pronom={{PRONOM|fmt/114}} |released=1985 }} '''Windows DDB''' (Device-Dependent Bitm..."

2014-12-01T19:09:37Z

Created page with "{{FormatInfo |formattype=electronic |subcat=Graphics |extensions={{ext|ddb}}, {{ext|bmp}} |pronom={{PRONOM|fmt/114}} |released=1985 }} '''Windows DDB''' (Device-Dependent Bitm..."

New page

{{FormatInfo
|formattype=electronic
|subcat=Graphics
|extensions={{ext|ddb}}, {{ext|bmp}}
|pronom={{PRONOM|fmt/114}}
|released=1985
}}
'''Windows DDB''' (Device-Dependent Bitmap), or '''Windows BMP v1''', is a graphics format associated with Microsoft Windows 1.0. It has only a little in common with the [[BMP]] formats that succeeded it.

== Disambiguation ==
The term ''DDB'' is also used for the in-memory BITMAP structure used by the Windows API. This structure is not necessarily the same as the file format described in this article. (Maybe it is the same on old versions of Windows?)

== Format ==
Files begin with a 10-byte header.

== Links ==
* {{EGFF|bmp|Microsoft Windows Bitmap File Format Summary}}, from the [[Encyclopedia of Graphics File Formats]]

[[Category:Microsoft]]

@@ Line 8: / Line 8: @@
 '''Windows DDB''' (Device-Dependent Bitmap), or '''Windows BMP v1''', is a graphics format associated with Microsoft Windows 1.0. It has only a little in common with the [[BMP]] formats that succeeded it.
-== Disambiguation ==
+This article covers both a particular file format, and the BITMAP structure on which it is based (which may be embedded in other formats).
-The term ''DDB'' is also used for the in-memory BITMAP structure used by the Windows API. This structure is not necessarily the same as the file format described in this article. (Maybe it is the same on old versions of Windows?)
-Bitmap files in this format can be found in the Windows 2 DDK.
+== BITMAP structure ==
-This format is not the format saved by Windows 1.0 Paint. It is generated by ICONEDIT, the Windows 1.x icon / cursor / bitmap editor.
+The structure is 14 bytes in size, with the last 4 bytes ("bmBits") being a memory pointer to the bitmap pixels.
-== Format ==
+In a file on disk, the bmBits field is usually not used (it's not clear whether some formats omit it entirely). The pixel data usually immediately follows.
-Files begin with a 16-byte header, the last 14 bytes of which correspond to the BITMAP structure:
 {| class="wikitable"
 ! Offset
 ! Type
 ! Meaning
 |-
-| 0x0002 || WORD || bmType: Always 0x0000 for main memory bitmap
+| 0x0000 || WORD || bmType
 |-
-| 0x0004 || WORD || bmWidth: Width in pixels
+| 0x0002 || WORD || bmWidth: Width in pixels
 |-
-| 0x0006 || WORD || bmHeight: Height in pixels
+| 0x0004 || WORD || bmHeight: Height in pixels
 |-
-| 0x0008 || WORD || bmWidthBytes: Width of a line in bytes
+| 0x0006 || WORD || bmWidthBytes: Width of a line in bytes
 |-
-| 0x000A || BYTE || bmPlanes: Number of planes in bitmap
+| 0x0008 || BYTE || bmPlanes: Number of planes in bitmap
 |-
-| 0x000B || BYTE || bmBitsPixel: Number of bits per pixel
+| 0x0009 || BYTE || bmBitsPixel: Number of bits per pixel
 |-
-| 0x000C || DWORD || bmBits: Always zero in disk file
+| 0x0002 || BITMAP16 || Refer to BITMAP16, above.<br>bmType: Always 0x0000 for main memory bitmap<br>bmBits: Always zero in disk file
 |}
 This is followed by the bitmap, in top-to-bottom order, with bmWidthBytes bytes per line.
-The [[WMF#Specifications|WMF specification]] defines a "Bitmap16" structure that seems to be this format, though without the "File type" field.
+== Specifications ==
 == Software ==

@@ Line 39: / Line 39: @@
 |}
 This is followed by the bitmap, in top-to-bottom order, with bmWidthBytes bytes per line.
 == Software ==

← Older revision		Revision as of 13:57, 20 January 2018
Line 40:		Line 40:
	This is followed by the bitmap, in top-to-bottom order, with bmWidthBytes bytes per line.		This is followed by the bitmap, in top-to-bottom order, with bmWidthBytes bytes per line.

		+	== Software ==
		+	* The MSWrite decoder from [https://sourceforge.net/projects/libwps/ libwps] appears to have source code for reading embedded DDB objects.

	== Links ==		== Links ==

@@ Line 13: / Line 13: @@
 Bitmap files in this format can be found in the Windows 2 DDK.
-This format is not the format saved by Windows 1.0 Paint.
+This format is not the format saved by Windows 1.0 Paint. It is generated by ICONEDIT, the Windows 1.x icon / cursor / bitmap editor.
 == Format ==

← Older revision		Revision as of 20:56, 29 March 2017
Line 18:		Line 18:

	[[Category:Microsoft]]		[[Category:Microsoft]]
		+	[[Category:Windows]]