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1 | |||
2 | VisualStudio instructions | ||
3 | |||
4 | libpng version 1.5.9 - February 18, 2012 | ||
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 1.5 with the default runtime options used by Visual Studio | ||
37 | 2010. 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 libpng15.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.) | ||
62 | |||
63 | The debug build of libpng is minimally supported. Support for debug builds of | ||
64 | zlib is also minimal. You really don't want to do this. | ||