tinf
PNG-library
| tinf | PNG-library | |
|---|---|---|
| 3 | 3 | |
| 142 | 29 | |
| - | - | |
| 10.0 | 6.9 | |
| over 1 year ago | about 1 year ago | |
| C | Java | |
| zlib License | - |
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tinf
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Hello, PNG
CRC is a table and 5 lines of code. That's trivial.
>zlib is 23k lines
It's not needed to make a PNG reader/writer. zlib is massive overkill for only making a PNG reader or writer. Here's a tiny deflate/inflate code [2] under 1k lines (and could be much smaller if needed).
stb[0] has single headers of ~7k lines total including all of the formats PNG, JPG, BMP,. PSD, GIF, HDR, and PIC. Here's [1] a 3k lines single file PNG version with tons if #ifdefs for all sorts of platforms. Removing those and I'd not be surprised if you could not do it in ~1k lines (which I'd consider quite simple compared to most of todays' media formats).
>Of course they're not common formats so you're stuck with complex formats like PNG
BMP is super common and easy to use anywhere.
I use flat image files all the time for quick and dirty stuff. They quickly saturate disk speeds and networking speeds (say recording a few decent speed cameras), and I've found PNG compression to alleviate those saturate CPU speeds (some libs are super slow, some are vastly faster). I've many times made custom compression formats to balance these for high performance tools when neither things like BMPs or things like PNG would suffice.
[0] https://github.com/nothings/stb
[1] https://github.com/richgel999/fpng/blob/main/src/fpng.cpp
[2] https://github.com/jibsen/tinf/tree/master/src
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EzGz - An easy to use single header no dependency library for decompression of .gz archives written in modern C++ (probably faster than zlib)
Right now I'm using a C library (https://github.com/jibsen/tinf) due to size constraints. Adding a few hundred kB is prohibitive in that space.
PNG-library
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Ask HN: Those making $0/month or less on side projects – Show and tell
My works over the years are accumulated on https://www.nayuki.io/ . Lately I finished writing a new PNG library ( https://www.nayuki.io/page/png-library ), and now I'm revamping a DEFLATE library ( https://www.nayuki.io/page/deflate-library-java ).
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JEP draft: No longer require super() and this() to appear first in a constructor
In the second constructor, the first call is Math.round(), followed by Foo(int).
I found myself needing to work around the limitation recently: https://github.com/nayuki/PNG-library/blob/b92cedc23b1fc32d5...
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Hello, PNG
Having implemented most of the PNG specification from scratch in the past month, I agree with all of the features highlighted by the author in the article's introduction. Although there are some minor things I don't like, overall it is a very well-designed format that has minimal ambiguity and stands the test of time.
You can find my modern Java PNG library at: https://www.nayuki.io/page/png-library , https://github.com/nayuki/PNG-library
What are some alternatives?
Stm32-FatFs-Gzip - This project offers a simplified compressor that produces Gzip-compatible output with small resources for microcontrollers and edge computers. He uses the very basic LZ77 compression algorithm and static Deflate Huffman tree encoding to compress / decompress data into Gzip files.
figlet-fonts - my collection of figlet / toilet ascii art fonts
just-an-email - App to share files & texts between your devices without installing anything
canvas_ity - A tiny, single-header <canvas>-like 2D rasterizer for C++
fpnge - Demo of a fast PNG encoder.
libpng - LIBPNG: Portable Network Graphics support, official libpng repository
fpng - Super fast C++ .PNG writer/reader
UNITS - a compile-time, header-only, dimensional analysis and unit conversion library built on c++14 with no dependencies.
nflate - Naive implementation of DEFLATE in C for decompressing gzip files (RFC 1951, RFC 1952).
jdeflate - DEFLATE compressor/decompressor implementation