src/png/projects/vstudio/readme.txt

   1
   2 VisualStudio instructions
   3
   4 libpng version 1.6.2 - April 25, 2013
   5
   6 Copyright (c) 1998-2010 Glenn Randers-Pehrson
   7
   8 This code is released under the libpng license.
   9 For conditions of distribution and use, see the disclaimer
  10 and license in png.h
  11
  12 This directory  contains support for building libpng under MicroSoft
  13 VisualStudio 2010.  It may also work under later versions of VisualStudio.
  14 You should be familiar with VisualStudio before using this directory.
  15
  16 Initial preparations
  17 ====================
  18 You must enter some information in zlib.props before attempting to build
  19 with this 'solution'.  Please read and edit zlib.props first.  You will
  20 probably not be familiar with the contents of zlib.props - do not worry,
  21 it is mostly harmless.
  22
  23 This is all you need to do to build the 'release' and 'release library'
  24 configurations.
  25
  26 Debugging
  27 =========
  28 The release configurations default to /Ox optimization.  Full debugging
  29 information is produced (in the .pdb), but if you encounter a problem the
  30 optimization may make it difficult to debug.  Simply rebuild with a lower
  31 optimization level (e.g. /Od.)
  32
  33 Linking your application
  34 ========================
  35 Normally you should link against the 'release' configuration.  This builds a
  36 DLL for libpng with the default runtime options used by Visual Studio 2010.
  37 In particular the runtime library is the "MultiThreaded DLL" version.
  38 If you use Visual Studio defaults to build your application you will have no
  39 problems.
  40
  41 If you don't use the Visual Studio defaults your application must still be built
  42 with the default runtime option (/MD).  If, for some reason, it is not then your
  43 application will crash inside libpng16.dll as soon as libpng tries to read
  44 from a file handle you pass in.
  45
  46 If you do not want to use the DLL, for example for a very small application,
  47 the 'release library' configuration may be more appropriate.  This is built
  48 with a non-standard runtime library - the "MultiThreaded" version.  When you
  49 build your application it must be compiled with this option (/MT), otherwise
  50 it will not build (if you are lucky) or crash (if you are not.)
  51
  52 Stop reading here
  53 =================
  54 You have enough information to build a working application.
  55
  56 Debug versions have limited support
  57 ===================================
  58 This solution includes limited support for debug versions of libpng.  You
  59 do not need these unless your own solution itself uses debug builds (it is
  60 far more effective to debug on the release builds, there is no point building
  61 a special debug build unless you have heap corruption problems that you can't
  62 track down.)
  63
  64 The debug build of libpng is minimally supported.  Support for debug builds of
  65 zlib is also minimal.  You really don't want to do this.