Borland Graphics Interface - Revision history

Jsummers: Category:Graphic

2024-05-10T16:06:41Z

Category:Graphic

Jsummers at 17:43, 25 March 2016

2016-03-25T17:43:02Z

Jsummers: /* Identification */

2016-03-24T15:35:14Z

‎Identification

Jsummers: /* Identification */

2016-03-24T15:03:54Z

‎Identification

Jsummers: Moved "Bitmap images" section to "BGI image" article

2016-03-24T14:53:46Z

Moved "Bitmap images" section to "BGI image" article

John e: Created page with "{{FormatInfo |formattype=electronic |subcat=Executables |extensions={{ext|bgi}} }} The '''Borland Graphics Interface''' is a graphics library used by DOS programs, which inclu..."

2016-03-22T19:41:31Z

Created page with "{{FormatInfo |formattype=electronic |subcat=Executables |extensions={{ext|bgi}} }} The '''Borland Graphics Interface''' is a graphics library used by DOS programs, which inclu..."

New page

{{FormatInfo
|formattype=electronic
|subcat=Executables
|extensions={{ext|bgi}}
}}
The '''Borland Graphics Interface''' is a graphics library used by DOS programs, which includes the ability to use loadable drivers. These drivers have the file extension .BGI.

== Identification ==
Files begin with <code>'P' 'K' 0x08 0x08 </code> -- this is shared with the [[CHR_(Borland_font)|CHR]] font files used by BGI. The four-byte signature is followed by either <code>'BGI Device Driver'</code> or <code>'SVGA 256 Colour BGI Device Driver'</code>.

== Main Entry ==
The first 160 bytes of the driver file are a header. This is followed by the driver code segment. Far calls will be made to this address with SI containing the function number to execute.

== Bitmap images ==
BGI contains <code>getimage()</code> and <code>putimage()</code> functions to save and load images. The images thus saved have a 4-byte header (two little-endian words giving the image's width and height) followed by the image data, in a form specific to the driver used. A 16-colour VGA image will contain four monochrome bitmaps for the four planes. These images, with a .ICN extension, are used as icons by [[RIPscrip_Icon|RIPscrip 1.x]] and Counterpoint.

== Specifications ==
* ftp://ftp.musoftware.de/pub/uz/bgi/ contains documentation and source code for creating BGI drivers, along with several complete drivers.

== Links ==
* [[Wikipedia:Borland Graphics Interface]]

[[Category:Borland]]

← Older revision		Revision as of 16:06, 10 May 2024
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	* [[Wikipedia:Borland Graphics Interface]]		* [[Wikipedia:Borland Graphics Interface]]

		+	[[Category:Graphics]]
	[[Category:Borland]]		[[Category:Borland]]

← Older revision		Revision as of 15:35, 24 March 2016
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	Following the signature is some text that names the driver, and gives copyright information. It usually begins with "<code>BGI Device Driver</code>" or "<code>SVGA 256 Colour BGI Device Driver</code>".		Following the signature is some text that names the driver, and gives copyright information. It usually begins with "<code>BGI Device Driver</code>" or "<code>SVGA 256 Colour BGI Device Driver</code>".
		+
		+	The header format was no doubt deliberately designed to be friendly to file viewers similar to the MS-DOS <code>type</code> command. The <code>0x08</code> bytes could be interpreted as backspace characters, which will hide the signature.

	== Main Entry ==		== Main Entry ==

@@ Line 3: / Line 3: @@
 |subcat=Executables
 |extensions={{ext|bgi}}
 }}
 The '''Borland Graphics Interface''' is a graphics library used by DOS programs, which includes the ability to use loadable drivers. These drivers have the file extension .BGI.
@@ Line 24: / Line 25: @@
 == Specifications ==
 * ftp://ftp.musoftware.de/pub/uz/bgi/ contains documentation and source code for creating BGI drivers, along with several complete drivers.
 == Links ==

@@ Line 7: / Line 7: @@
 == Identification ==
-Files begin with <code>'P' 'K' 0x08 0x08 </code> -- this is shared with the [[CHR_(Borland_font)|CHR]] font files used by BGI. The four-byte signature is followed by either <code>'BGI Device Driver'</code> or <code>'SVGA 256 Colour BGI Device Driver'</code>.
+Most BGI files begin with a 4-byte signature: <code>"pk" 0x08 0x08</code>. Note the similarity to [[CHR (Borland font)|CHR]] font files used by BGI.
 == Main Entry ==

@@ Line 12: / Line 12: @@
 The first 160 bytes of the driver file are a header. This is followed by the driver code segment. Far calls will be made to this address with SI containing the function number to execute.
-== Bitmap images ==
+== Related formats ==
-BGI contains <code>getimage()</code> and <code>putimage()</code> functions to save and load images. The images thus saved have a 4-byte header (two little-endian words giving the image's width and height) followed by the image data, in a form specific to the driver used. A 16-colour VGA image will contain four monochrome bitmaps for the four planes. These images, with a .ICN extension, are used as icons by [[RIPscrip_Icon|RIPscrip 1.x]] and Counterpoint.
+* [[BGI image]]
 == Specifications ==