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fpng is a very fast C++ .PNG image reader/writer for 24/32bpp images. fpng.cpp was written to see just how fast you can write .PNG's without sacrificing too much compression. The files written by fpng conform to the [PNG standard](https://www.w3.org/TR/PNG/), are readable using any PNG decoder, and validate successfully using [pngcheck](https://www.w3.org/TR/PNG/). PNG files written using fpng can also be read back using fpng around 3x faster than other PNG libraries, such as stb_image.
fpng is a very fast C++ .PNG image reader/writer for 24/32bpp images. fpng.cpp was written to see just how fast you can write .PNG's without sacrificing too much compression. The files written by fpng conform to the [PNG standard](https://www.w3.org/TR/PNG/), are readable using any PNG decoder, and validate successfully using [pngcheck](https://www.w3.org/TR/PNG/). PNG files written using fpng can also be read back using fpng around 2.5-3x faster than other PNG libraries, such as stb_image.
fpng.cpp compression compared to stb_image_write.h: 12-19x faster with roughly 5-11% avg. smaller files.
fpng.cpp decompression compared to stb_image_write.h: ~3x faster
