For smaller images stb_image’s performance is even closer to libpng/libjpeg-turbo. My point is, a website interface the single most accessible way so that 100% of people can use it, regardless of platform or programming expertise. In short: (On my machine) it’s faster than libjpeg, a bit slower than libjpeg-turbo, twice as fast as lodepng (another one-file-png decoder which also has a nice API) and a bit slower than libpng. The only difference between the two images is that the one on the left does not have gamma or sRGB PNG chunks (generated using LodePNG), the one on the right has both (it was generated by reading the one on the left into paint.net and then writing it out; you can review the chunks using pngcheck in verbose mode). (It doesn't use libpng either; it is using LodePNG, which is better in many ways, in my opinion.) Long answer /* write an rgba image to a memory buffer in PNG format, without any fanciness. Here's the code that you need to read images: Tiny PNG Output. For smaller images stb_image’s performance is even closer to libpng/libjpeg-turbo. Some styles failed to load. ... (especially ubuntu libpng version mismatch vs. ardour, 12.49 vs. 1.6). Can anyone confirm that there is just the WinRT80/81 and Win phone 80/81, VS 2013/5 files and not a Win10 UWP_VS2015 project for SDL_Image? And a GIMP plugin. That's an unfortunate consequence of the … Last time I wanted something with minimal overhead, so I went with straight-up libpng. american fuzzy lop (2.52b) American fuzzy lop is a security-oriented fuzzer that employs a novel type of compile-time instrumentation and genetic algorithms to automatically discover clean, interesting test cases that trigger new internal states in the targeted binary. 64-bit Zlib static library from here, wonderful LodePNG (a replacement for libpng) from here. I'm remembering comments from a discussion about lodePNG at https: ... On a second look, this is "almost" correct. Comparing the licenses of libpng-1.6.34 vs libpng-1.0.7, I saw statements inserted after the fact, like, for example, this one: "Some files in the "scripts" directory have other copyright owners, but are released under this license However, I would like to be able to do at least 10 VGA-sized conversions per second. Hi Morten Nobel-Jørgensen, I’m having the same problem as Ushna and Praveen above. In short: (On my machine) it’s faster than libjpeg, a bit slower than libjpeg-turbo, twice as fast as lodepng (another one-file-png decoder which also has a nice API) and a bit slower than libpng. I can open, convert, and save an image every 3 seconds with the most optimal settings. It's as simple as it gets, you just need to place the header files stb_image.h and stb_image_write.h in your folder.. if you know you want to use png / jpg, just use libpng / libjpg. Licensed as LGPLv3+. However, LodePNG appears to be way too slow for my application. Oh no! An overly-simplified C++ wrapper for libpng. Comparing Performance: stb_image vs libjpeg(-turbo), libpng and lodepng March 23, 2015 I recently tried out Sean Barrett’s stb_image.h and was blown away by how fucking easy it is to use. The home site for development versions (i.e., may be buggy or subject to change or include experimental features) is https://libpng.sourceforge.io/, and the place to go for questions about the library is the png-mng-implement mailing list. Is there any c function that allow me to convert a raw image to a PNG file? Please try reloading this page Help Create Join Login. stb_image is great for simplicity, but AFAIK it's designed as a 'just let me load some images' library, rather than a 'I need high performance image compression & encoding'. No alternative is good either, png++ is only a "front-end" to libpng, lodepng is C, CImg, and any other alternative out there, is C, ugly code, macros and globals all over, not header-only. Just not suitable to use in a lean, modern, C++ project. Use LodePng for gfx. For smaller images stb_image’s performance is even closer to libpng/libjpeg-turbo. @Jamaika: You may use this photo I just shot (CC0), containing some office tools with more or less saturated colors, plenty digicam noise, 4000x3000 px, PNG developed from raw data. I am developing my project (a raytracer) under VS 2003 (C++, Professional). Integrating it into your project is trivial: Just add the header and somewhere do: Sure, a Photoshop plugin would be great. Programmer's notes: switched to all C++ and a single build directory and project. Contribute to rahulg/tinypng development by creating an account on GitHub. GCC produces faster code than Clang. GCC produces faster code than Clang. Please keep always in mind that I'm working in Release Configuration. 5 years ago. Preferably, I don't need to pull in a big library for that. Tiny PNG Output is a small standalone library, available in C and C++, which takes RGB8.8.8 pixels and writes a PNG file. > LodePNG is a PNG image decoder and encoder, all in one, no dependency or linkage to zlib or libpng required. Short answer, just use lodepng. Thanks for linking my lib :-) Regarding the performance, I did some tests a while ago (stb_image vs libpng/libjpeg(turbo)) and for png decoding stb_image was between 0% and 40% slower than libpng (which is used by SDL_Image) - the performance difference was bigger with bigger images. It's not the best designed API in the world, but if you just work through the steps in one of their tutorials, it's pretty hard to mess up. Wasn't overly complicated, worked like a charm. Or you mean the title here in HN? I hear that libpng's use of zlib makes it run much faster, but I have no idea how to use conversion with libpng. 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