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Add config option to test for 'COLR' v1 support in headers.

* include/freetype/config/ftoption.h (TT_SUPPORT_COLRV1): New macro
so that clients can test whether the FreeType checkout that they are
building against supports the 'COLR' v1 API.  This is intended to be
a temporary solution until 'COLR' v1 support is released in a
FreeType version and such a check can be made by using the version
number instead.

git/fs: mount .git/fs: mount/attach disallowed

--- a/ChangeLog

+++ b/ChangeLog

@@ -1,3 +1,14 @@

+2021-01-13  Dominik Röttsches  <[email protected]>

+

+	Add config option to test for 'COLR' v1 support in headers.

+

+	* include/freetype/config/ftoption.h (TT_SUPPORT_COLRV1): New macro

+	so that clients can test whether the FreeType checkout that they are

+	building against supports the 'COLR' v1 API.  This is intended to be

+	a temporary solution until 'COLR' v1 support is released in a

+	FreeType version and such a check can be made by using the version

+	number instead.

+

 2020-12-16  Dominik Röttsches  <[email protected]>

 	[base] Fill 'COLR' v1 API templates to make them work (#59703).

--- a/include/freetype/config/ftoption.h

+++ b/include/freetype/config/ftoption.h

@@ -979,6 +979,21 @@

   /*

+   * The TT_SUPPORT_COLRV1 macro is defined to indicate to clients that this

+   * version of FreeType has support for 'COLR' v1 API.  This definition is

+   * useful to FreeType clients that want to build in support for 'COLR' v1

+   * depending on a tip-of-tree checkout before it is officially released in

+   * FreeType, and while the feature cannot yet be tested against using

+   * version macros.  Don't change this macro.  This may be removed once the

+   * feature is in a FreeType release version and version macros can be used

+   * to test for availability.

+   */

+#ifdef TT_CONFIG_OPTION_COLOR_LAYERS

+#define  TT_SUPPORT_COLRV1

+#endif

+

+

+  /*

    * Check CFF darkening parameters.  The checks are the same as in function

    * `cff_property_set` in file `cffdrivr.c`.

    */