lpcware

libpng included in emWIn

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by harper23 on Mon Jul 01 06:00:13 MST 2013

It looks like the emWin library is built with the libpng library. It exports the symols and it's reasonable to use libpng to display PNG images.


The function png_get_header_ver() returns "1.2.15". But there are no libpng headers in the directory tree built by the NXP installer. When I get the official libpng version 1.2.15 I get all the png.h stuff an the like. But the structures does not match. The size of the jumpbuf in the png_structp seems to be different to the definition in setjmp.h for the LPC1788.h


<ul>
<li>What configuration (pnglibconf.h) has been used for buildung the NXP  version of the emWin library?</li>
<li>Where are the header files for the use of the libpng functions available?</li>
</ul>

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