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Add new function `FT_Face_Properties'.

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This commit provides the framework, to be filled with something
useful in the next commits.

* include/freetype/freetype.h (FT_Face_Properties): Declare.

* src/base/ftobjs.c (FT_Face_Properties): New function.
This commit is contained in:
Nikolaus Waxweiler 2017-02-15 08:06:35 +01:00 committed by Werner Lemberg
parent e432ebf2e2
commit 64cdee7348
3 changed files with 82 additions and 1 deletions
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12
ChangeLog
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@ -1,3 +1,15 @@
2017-02-14 Nikolaus Waxweiler <madigens@gmail.com>
Werner Lemberg <wl@gnu.org>
Add new function `FT_Face_Properties'.
This commit provides the framework, to be filled with something
useful in the next commits.
* include/freetype/freetype.h (FT_Face_Properties): Declare.
* src/base/ftobjs.c (FT_Face_Properties): New function.
2017-02-13 Werner Lemberg <wl@gnu.org>
[autofit] Prevent overlapping blue zones.

39
include/freetype/freetype.h
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@ -175,6 +175,7 @@ FT_BEGIN_HEADER
/* FT_Done_Face */
/* FT_Reference_Face */
/* FT_New_Memory_Face */
/* FT_Face_Properties */
/* FT_Open_Face */
/* FT_Open_Args */
/* FT_Parameter */
@ -1925,7 +1926,7 @@ FT_BEGIN_HEADER
/* */
/* <Description> */
/* A simple structure to pass more or less generic parameters to */
/* @FT_Open_Face. */
/* @FT_Open_Face and @FT_Face_Properties. */
/* */
/* <Fields> */
/* tag :: A four-byte identification tag. */
@ -3612,6 +3613,42 @@ FT_BEGIN_HEADER
FT_UInt *agindex );
/*************************************************************************
*
* @function:
* FT_Face_Properties
*
* @description:
* Set or override certain (library or module-wide) properties on a
* face-by-face basis. Useful for finer-grained control and avoiding
* locks on shared structures (threads can modify their own faces as
* they see fit).
*
* Contrary to @FT_Property_Set, this function uses @FT_Parameter so
* that you can pass multiple properties to the target face in one call.
* Note that only a subset of the available properties can be
* controlled.
*
* @input:
* face ::
* A handle to the source face object.
*
* num_properties ::
* The number of properties that follow.
*
* properties ::
* A handle to an @FT_Parameter array with `num_properties' elements.
*
* @return:
* FreeType error code. 0~means success.
*
*/
FT_EXPORT( FT_Error )
FT_Face_Properties( FT_Face face,
FT_UInt num_properties,
FT_Parameter* properties );
/*************************************************************************/
/* */
/* <Function> */

32
src/base/ftobjs.c
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@ -3589,6 +3589,38 @@
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Face_Properties( FT_Face face,
FT_UInt num_properties,
FT_Parameter* properties )
{
FT_Error error = FT_Err_Ok;
if ( num_properties > 0 && !properties )
{
error = FT_THROW( Invalid_Argument );
goto Exit;
}
for ( ; num_properties > 0; num_properties-- )
{
error = FT_THROW( Invalid_Argument );
goto Exit;
if ( error )
break;
properties++;
}
Exit:
return error;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_UInt )