PNG reference library 1.5.5 Beta 5 / 1.5.4

Portable Network Graphics library Reference library for supporting the Portable Network Graphics (PNG) format. Now you have all the information related to the PNG image format at your disposal. What’s New in This Release: · Prevent unexpected API exports from non-libpng DLLs on Windows. · The “_DLL” is removed from the test of whether a DLL is being built (this erroneously caused the libpng APIs to be marked as DLL exports in static builds under Microsoft Visual Studio). · Almost all of the libpng building configuration is moved from pngconf.h to pngpriv.h, but PNG_DLL_EXPORT remains in pngconf.h, though, so that it is colocated with the import definition (it is no longer used anywhere in the installed headers). · The VStudio project definitions have been cleaned up: “_USRDLL” has been removed from the static library builds (this was incorrect), and PNG_USE_DLL has been added to pngvalid to test the functionality (pngtest does not supply it, deliberately). · The spurious “_EXPORTS” has been removed from the libpng build (all these errors were a result of copy/paste between project configurations.) · Added new types and internal functions for CIE RGB end point handling to pngpriv.h (functions yet to be implem…