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Xfig at a glance
Xfig
Xfig began in 1985 and accumulated decades of maintenance and export tooling, which made the .fig format a durable bridge between interactive diagram editing on Unix systems and downstream conversion to PostScript, PDF, and other outputs.
PGX at a glance
PGX
These formats persist in engineering, compression research, and conversion-tool contexts where simple sample storage or adjunct technical representation is useful.
Format comparison
| Feature | Xfig | PGX |
|---|---|---|
| File type | Vector | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1985 | 2000 |
| Inventor | Supoj Sutanthavibul | ISO/IEC (JPEG 2000 committee) |
| Status | legacy | active |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Layer support | Not supported | Not supported |
| Vector scaling | Supported | Not supported |
When to use each format
When to use Xfig
- Your source file is already in Xfig.
- Preserve source expectations before exporting to PGX.
- Xfig is commonly used in vector workflows.
When to use PGX
- Your target workflow expects PGX.
- Improve delivery compatibility with PGX.
- PGX is commonly used in image workflows.
FAQs
Why convert Xfig to PGX?
Convert to PGX when a technical imaging or codec workflow expects grayscale component data in a simple specialist format.
It is useful for research, testing, and standards-oriented image processing.
What changes when converting Xfig to PGX?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to PGX removes vector scaling.
What should I review after converting Xfig to PGX?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.