PNG files structure

png file-format file-structure
Danilo Valente picture Danilo Valente · Jul 18, 2012 · Viewed 7.7k times · Source

I've already learned how to generate BMP images based on the BMP files structure (here and here).

Now I'm looking for the PNG file structure but I haven't found any good explanations.

Do you know where I can find this explanation with schemes as well?

Answer

timos picture timos · Jul 18, 2012

The complete specification is available here: http://www.libpng.org/pub/png/spec/1.2/png-1.2.pdf

Note that the PNG format is much more complex than BMP, since it allows compression, etc.

Related questions

File format limits in pixel size for png images?

Is there a file format limit to the PNG pixel size? I am trying to visualize a 30.000x30.000 pixels PNG image with Firefox, but I get an error. The image opens correcly in Preview.app, although very slowly. The file …

Read More
Which format for small website images? GIF or PNG?

When doing small icons, header graphics and the like for websites, is it better to use GIFs or PNGs? Obviously if transparency effects are required, then PNGs are definitely the way to go, and for larger, more photographic images I'd …

Read More
Change color of PNG image via CSS?

Given a transparent PNG displaying a simple shape in white, is it possible to somehow change the color of this through CSS? Some kind of overlay or what not?

Read More