https://github.com/mrfearless/cd
CD - Compress-Decompress Utility
https://github.com/mrfearless/cd
assembler compression compressor huffman lzms masm mszip radasm win32 x86 xpress
Last synced: 8 months ago
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CD - Compress-Decompress Utility
- Host: GitHub
- URL: https://github.com/mrfearless/cd
- Owner: mrfearless
- Created: 2023-10-20T22:38:51.000Z (about 2 years ago)
- Default Branch: main
- Last Pushed: 2023-10-30T16:38:41.000Z (about 2 years ago)
- Last Synced: 2025-02-15T16:49:55.730Z (10 months ago)
- Topics: assembler, compression, compressor, huffman, lzms, masm, mszip, radasm, win32, x86, xpress
- Language: Assembly
- Homepage:
- Size: 556 KB
- Stars: 3
- Watchers: 2
- Forks: 0
- Open Issues: 0
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Metadata Files:
- Readme: README.md
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README
#  CD
**CD** - Compress-Decompress Utility using the Microsoft Compression API
**CD** uses the Microsoft Compression API to compress or decompress data using one of the four supported compression algorithms: **XPRESS**, **XPRESS with Huffman encoding**, **MSZIP** or **LZMS**.
The files compressed by **CD** using those compression algorithms also store a signature `DWORD` value as the header at the start of the file. This is so that the appropriate compression algorithm can be used for the decompression.
**CD** also makes use of the Microsoft Compression API to store bitmap resources as **LZMS** compressed data. There are two ways in which **CD** uses that compressed bitmap data:
- In the about box, by uncompressing the bitmap data before creating the bitmap in memory. The **LZMS** compressed bitmap data is stored as static hex bytes in the `CD128x128x4.bmp.asm` file.
- Adding **LZMS** compressed bitmap files (`*.lzms`) as `RC_DATA` resources which are compiled into `CD.exe`. These resources are loaded into memory, and then uncompressed before creating the bitmaps in memory.
**CD** also allows an optional output of compressed data bytes as a masm `.asm` file with '`db`' data defines, similar to the [masm32 sdk](https://masm32.com/) utility **bin2dbex**.
**Note: the minimum version of windows to use for the Microsoft Compression API and thus to use the CD - Compress-Decompress Utility is [Windows 8](https://learn.microsoft.com/en-us/windows/win32/api/compressapi/nf-compressapi-compress#requirements)**
# Download
The latest x86 and x64 release can be downloaded via the [releases](https://github.com/mrfearless/cd/releases) section of this Github repository.
# Resources
For further information about the Microsoft Compression API, please refer to the following links:
- [Microsoft Compression Portal](https://learn.microsoft.com/en-us/windows/win32/cmpapi/-compression-portal)
- [Using The Microsoft Compression API](https://learn.microsoft.com/en-us/windows/win32/cmpapi/using-the-compression-api)
- [Compress Function](https://learn.microsoft.com/en-us/windows/win32/api/compressapi/nf-compressapi-compress)
- [Decompress Function](https://learn.microsoft.com/en-us/windows/win32/api/compressapi/nf-compressapi-decompress)