MegaPaint BLD

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|subcat=Graphics
 
|subcat=Graphics
 
|extensions={{ext|bld}}
 
|extensions={{ext|bld}}
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|released=≤1990
 
}}
 
}}
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'''MegaPaint BLD''' is a really obscure graphic file format (probably raster) for the MegaPaint program, which, according to a [https://www.reaconverter.com/convert/bld_to_pdf.html page] that's trying to get people to download a trial version of a program to convert it to [[PDF]], was for "early types of personal computers, including Commodore 64, Atari and Amiga." No more specific information seems to be easily findable, though there are pages for this extension on lots of the exploitative sites that have auto-generated, not-very-informative pages on every file extension they can find on any list. This format does show up on the list of formats supported by some multi-format utilities (including  [[Konvertor]] and [[XnView]]), which is likely how the other sites found out about it.
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'''MegaPaint BLD''' is the main native raster graphics format of MegaPaint, a graphics editor developed by TommySoftware. There were editions of MegaPaint for Atari ST, MS-DOS, and Windows. Some were released as shareware. The best information about MegaPaint might be in German.
  
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A search also stumbles onto the [http://megapaint.com.ph/ Mega Paint and Coating Corporation] in the Philippines, but this doesn't seem to have any connection with this format.
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In addition to raster graphics, MegaPaint apparently has some sort of support for vector graphics.
  
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== Links ==
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== Related formats ==
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* [http://cd.textfiles.com/crawlycrypt2/crm_demo/megapait/ MegaPaint demo] (Atari software)
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Other MegaPaint formats include:
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* [https://de.wikipedia.org/wiki/TommySoftware German Wikipedia: TommySoftware] - developer of MegaPaint
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* .PAT - MegaPaint pattern
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* .VEK - MegaPaint vector format
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* .LIB - MegaPaint symbols library
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* .VLB - MegaPaint vector symbols library
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* .FNT - MegaPaint font
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== Format details ==
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BLD format:
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{| class="wikitable"
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! Offset !! Type !! Details
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|-
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|0 || signed int16 [[Endianness|BE]] || Code for the image width and compression scheme. Actual width is 1 + the absolute value of this field. If negative, image is compressed.
 +
|-
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|2 || signed(?) int16 BE || Code for the image height. Actual height is 1 + the value of this field.
 +
|-
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|4 || bytes || The pixel data. After decompression if necessary (see below), the format is 1 bit/pixel, white-is-zero. Rows are padded to the next byte boundary.
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|}
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=== Decompression algorithm ===
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Read the next byte, follow the instructions below, repeat.
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{| class="wikitable"
 +
! Code byte (N) !! Instructions
 +
|-
 +
|N=0 or N=255 || Read the next byte (C). Emit C+1 bytes of value N.
 +
|-
 +
|Any other || Emit 1 byte of value N.
 +
|}
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== Software ==
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* [[XnView]]
 
* [[Konvertor]]
 
* [[Konvertor]]
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* [[RECOIL]]
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* [[Farbfeld Utilities]]
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* [http://whatis.rest7.com/how-to-open-bld-file Rest7 Online Converter]
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* {{Deark}}
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* MegaPaint
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** http://cd.textfiles.com/pslmonthly25/words/dos/gr_draw/megapnt.exe - MegaPaint PC Version 1.10; English; shareware
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** [https://archive.org/details/weird-science-clipart-cd Weird Science Clip Art CD] → UTILITY/PC/MEGAPANT/ - Another copy of PC v1.10
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** http://cd.textfiles.com/crawlycrypt2/crm_demo/megapait/ - MegaPaint Professional Demo v3.00; Atari ST; German
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** http://cd.textfiles.com/suzybatari1/picmanip/pic_m2r/mpntdemo/ - MegaPaint Professional Demo 4.00; Atari ST; English
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== Sample files ==
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* http://cd.textfiles.com/pslmonthly25/words/dos/gr_draw/megapnt.exe ([[Self-extracting ZIP]]) → PICTURES/*.BLD
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* http://cd.textfiles.com/suzybatari1/picmanip/pic_m2r/mpntdemo/pictures/ → *.bld
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* {{DexvertSamples|image/bld}}
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* {{DexvertSamples|image/megaPaintPattern}}
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== Links ==
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* [https://de.wikipedia.org/wiki/TommySoftware German Wikipedia: TommySoftware]
 
* {{AtariForumWiki|MegaPaint_file_format|MegaPaint file format}}, from the Atari Forum Wiki
 
* {{AtariForumWiki|MegaPaint_file_format|MegaPaint file format}}, from the Atari Forum Wiki
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 +
[[Category:Atari graphics formats]]

Latest revision as of 04:39, 28 December 2023

File Format
Name MegaPaint BLD
Ontology
Extension(s) .bld
Released ≤1990

MegaPaint BLD is the main native raster graphics format of MegaPaint, a graphics editor developed by TommySoftware. There were editions of MegaPaint for Atari ST, MS-DOS, and Windows. Some were released as shareware. The best information about MegaPaint might be in German.

In addition to raster graphics, MegaPaint apparently has some sort of support for vector graphics.

Contents

[edit] Related formats

Other MegaPaint formats include:

  • .PAT - MegaPaint pattern
  • .VEK - MegaPaint vector format
  • .LIB - MegaPaint symbols library
  • .VLB - MegaPaint vector symbols library
  • .FNT - MegaPaint font

[edit] Format details

BLD format:

Offset Type Details
0 signed int16 BE Code for the image width and compression scheme. Actual width is 1 + the absolute value of this field. If negative, image is compressed.
2 signed(?) int16 BE Code for the image height. Actual height is 1 + the value of this field.
4 bytes The pixel data. After decompression if necessary (see below), the format is 1 bit/pixel, white-is-zero. Rows are padded to the next byte boundary.

[edit] Decompression algorithm

Read the next byte, follow the instructions below, repeat.

Code byte (N) Instructions
N=0 or N=255 Read the next byte (C). Emit C+1 bytes of value N.
Any other Emit 1 byte of value N.

[edit] Software

[edit] Sample files

[edit] Links

Retrieved from "http://fileformats.archiveteam.org/index.php?title=MegaPaint_BLD&oldid=47315"
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