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[master] Enabled iTXt support by default.

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To ensure binary compatibility with
    previous versions, the "lang" and "lang_key" members will be assumed
    to be omitted from previous versions unless the current libpng
    version was built with PNG_iTXt_SUPPORTED (which is otherwise no
    longer necessary to gain iTXt support), as a signal that the user has
    been building previous versions with PNG_iTXt_SUPPORTED as well.
This commit is contained in:
Glenn Randers-Pehrson
2009-10-31 23:20:11 -05:00
parent 602d314ba0
commit 29b738b4e6
5 changed files with 66 additions and 10 deletions
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12
pngconf.h
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@@ -526,6 +526,18 @@
* will be turned on by default in libpng-1.4.0.
*/
/* If you have previously been defining PNG_iTXt_SUPPORTED, please
* continue to do so in libpng-1.2.41 and later, until you switch to
* libpng-1.4.0, even though it is not necessary now to gain iTXt support.
* Your PNG_iTXt_SUPPORTED definition will be interpreted in png_set_text()
* as a signal that you have defined it in your builds of previous libpng
* versions that did not support iTXt by default.
*/
#if !defined(PNG_iTXt_SUPPORTED) && !defined(PNG_READ_iTXt_SUPPORTED) && \
!defined(PNG_WRITE_iTXt_SUPPORTED)
# define PNG_iTXt_NOT_PREVIOUSLY_SUPPORTED
#endif
#if defined(PNG_1_0_X) || defined (PNG_1_2_X)
# ifndef PNG_iTXt_SUPPORTED
# ifndef PNG_NO_iTXt_SUPPORTED