https://github.com/jangko/nimpdf
PDF document writer, written in nim lang
https://github.com/jangko/nimpdf
nim pdf pdf-generation pdf-producer
Last synced: 2 months ago
JSON representation
PDF document writer, written in nim lang
- Host: GitHub
- URL: https://github.com/jangko/nimpdf
- Owner: jangko
- License: other
- Created: 2015-05-05T05:04:01.000Z (almost 10 years ago)
- Default Branch: master
- Last Pushed: 2021-12-01T09:43:45.000Z (over 3 years ago)
- Last Synced: 2025-01-05T14:48:40.381Z (4 months ago)
- Topics: nim, pdf, pdf-generation, pdf-producer
- Language: Nim
- Size: 25.8 MB
- Stars: 172
- Watchers: 12
- Forks: 10
- Open Issues: 13
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Metadata Files:
- Readme: readme.md
- License: LICENSE.TXT
Awesome Lists containing this project
- awesome-nim - nimpdf - PDF document writer, written in Nim. (Multimedia / Documents)
README
# nimPDF
[](https://travis-ci.org/jangko/nimpdf)
[](https://ci.appveyor.com/project/jangko/nimpdf)
nimPDF is a free PDF writer library, written mostly in nim programming language
nimPDF was heavily inspired by PHP-[FPDF](http://www.fpdf.org) but also influenced by [jagPDF](http://www.jagpdf.org), [libHaru](http://www.libharu.org)(especially for the demo), [PyFPDF](https://code.google.com/p/pyfpdf), [pdfkit](http://devongovett.github.io/pdfkit)
after lodePNG substituted with PNG decoder written in nim, nimPDF become one step closer to 100% pure nim
nimPDF implements the following features(see [demo.pdf](https://github.com/jangko/nimpdf/blob/master/demo/demo.pdf)):
nimPDF version 0.4.0 introduces many breaking changes, see [migration guide](migration.md) to help you change your code.
* **images**
- PNG -- ~~use [LodePNG](lodev.org/lodepng), still in C~~ now written in nim
- JPEG -- use [uJPEG (MicroJPEG) -- KeyJ's Small Baseline JPEG Decoder](http://keyj.emphy.de/nanojpeg), still in C
- BMP -- use [EasyBMP](http://easybmp.sourceforge.net), already ported to nim, support 1bit, 4bit, 8bit, 16bit, 24bit, and 32bit images
- beside transparency from original image(such as from PNG), you can adjust individual image transparency as easy as other elements in your document
* **text and fonts**
- support TTF/TTC font subsetting -- use [Google sfntly](code.google.com/p/sfntly), ported(partially) to nim and modified
- you can easily tell the library to look for fonts in certain folder(s)
- you only need to ask for font family name and it's style, the library will try to find the right one for you(if avilable)
- text encoded in UTF-8 if you use TTF/TTC
- 14 base font in PDF use Standard,MacRoman,WinAnsi encoding
- TTF/TTC fonts can be written vertically if they have vertical metrics
* **Path construction**
- straight segments, Bezier curves, elliptical arcs, roundrect
- join styles and miter limits
- dash patterns
- path clipping
- arbitrary path bounding box calculation(i use it to implement gradient too)
- construct path from mathematical function - taken from [ C# GraphDisplay](http://www.codeproject.com/Articles/58280/GraphDisplay-a-Bezier-based-control-for-graphing-f)
* **Color spaces**
- Gray, RGB, CMYK
- alpha channel for text, path, and images too!
- linear gradient to fill any closed shape
- radial gradient to fill any closed shape
* **Interactive Features**(see demo folder)
- Page Labels
- Document Outline
- Hyperlinks
- Text annotation
- Encryption(protect document with password)
- choose between ARC4-40, ARC4-128, AES-128, AES-256 encryption mode
- Form Field:
- TextField
- Combo Box
- Radio
- Push Button
- List Box
- Check Box
* **Coordinate Space**
- top-down mode
- bottom-up mode
- unit measured in point, inch, and mm
* **others**
- output to file or memory using nim stream module
- images, fonts, and other resources search path(s)
- document compression using flate decode(use lodePNG compressor)
- transformation and graphics state
* **unimplemented features**
- CIE based color space
- patterns(this can be achieved using PDF primitives and path clipping)
- ~~encryption~~
- ~~annotation~~
- ~~hyperlinks~~
- ~~other encoding beside UTF-8~~(nim has [encoding](http://nim-lang.org/docs/encodings.html) module, i will use it someday)
- basic text formating(will be implemented as separate layer)
- ~~radial gradient~~ and multi color gradient
- table generator(as in FPDF)(will be implemented as separate layer)
- ~~document outline~~
- permission
- digital signature
# Documentation
The documentation is generated using docutils
The documentation provided may not be complete, please help to improve it
# Installation and build instructions
> nimble install nimPDF
* build general demo: `nim c demo`
* build specific demo: goto nimPDF/demo folder, type `nim e build.nims`
# Dependencies
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