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author | Ben Wagner <bungeman@chromium.org> | 2023-04-06 11:16:29 -0400 |
---|---|---|
committer | Werner Lemberg <wl@gnu.org> | 2023-04-11 10:20:58 +0200 |
commit | e78e2d29a95baf6053e30cc9422aa20319259803 (patch) | |
tree | e78efe8d5058413ff52ba636159e0692bcdd3985 /src/truetype/ttobjs.c | |
parent | e77d8ba87cf24c4bd07c5c4f23b17e5e4d4f433b (diff) | |
download | freetype2-e78e2d29a95baf6053e30cc9422aa20319259803.tar.gz |
[sfnt, truetype] Add `size_reset` to `MetricsVariations`.
This is a generalization of commit
```
commit e6699596af5c5d6f0ae0ea06e19df87dce088df8
Author: Werner Lemberg <wl@gnu.org>
Date: Thu Feb 2 11:38:04 2017 +0100
[truetype] Fix MVAR post-action handling.
```
It is also possible for plain `CFF ` style fonts to contain an `fvar` and
`MVAR` table and use `cff_metrics_adjust`. `tt_size_reset` should only be
called with `TT_Size` and never with `CFF_Size`.
Allow the "metrics-variations" service to specify the correct function (if
any) to reset `FT_Size`s after adjusting metrics.
* src/truetype/ttobjs.c (tt_size_reset): Split off some functionality
into...
(tt_size_reset_height): ... this new function.
* src/truetype/ttdriver.c (tt_service_metrics_variations): Add
`size_reset`.
(tt_size_select, tt_size_request): Updated.
* src/truetype/ttobjs.h: Updated.
* include/freetype/internal/services/svmetric.h (MetricsVariations): Add
`size_reset`.
(FT_DEFINE_SERVICE_METRICSVARIATIONSREC): Updated.
* include/freetype/internal/tttypes.h (TT_FaceRec_): Rename `var` to
`tt_var` and add `face_var`.
* src/cff/cffdrivr.c (cff_service_metrics_variations): Add `size_reset`.
(cff_hadvance_adjust, cff_metrics_adjust): Updated.
* src/cff/cffobjs.c (cff_face_init): Use `face_var`.
* src/sfnt/sfobjs.c (sfnt_init_face): Initialize `face_var`.
* src/sfnt/ttmtx.c (tt_face_get_metrics): Use `tt_var`.
* src/truetype/ttgxvar.c (tt_size_reset_iterator): Renamed to...
(ft_size_reset_iterator): ... this new function.
Call `size_reset`.
(tt_apply_mvar): Pass `size_reset` to `ft_size_reset_iterator`.
Fixes #1211
Diffstat (limited to 'src/truetype/ttobjs.c')
-rw-r--r-- | src/truetype/ttobjs.c | 62 |
1 files changed, 35 insertions, 27 deletions
diff --git a/src/truetype/ttobjs.c b/src/truetype/ttobjs.c index 4a8873fd8..ee4f3de1b 100644 --- a/src/truetype/ttobjs.c +++ b/src/truetype/ttobjs.c @@ -1338,39 +1338,25 @@ /************************************************************************** * * @Function: - * tt_size_reset + * tt_size_reset_height * * @Description: - * Reset a TrueType size when resolutions and character dimensions - * have been changed. + * Recompute a TrueType size's ascender, descender, and height + * when resolutions and character dimensions have been changed. + * Used for variation fonts as an iterator function. * * @Input: * size :: * A handle to the target size object. - * - * only_height :: - * Only recompute ascender, descender, and height; - * this flag is used for variation fonts where - * `tt_size_reset' is used as an iterator function. */ FT_LOCAL_DEF( FT_Error ) - tt_size_reset( TT_Size size, - FT_Bool only_height ) + tt_size_reset_height( TT_Size size ) { - TT_Face face; - FT_Size_Metrics* size_metrics; - - - face = (TT_Face)size->root.face; - - /* nothing to do for CFF2 */ - if ( face->is_cff2 ) - return FT_Err_Ok; + TT_Face face = (TT_Face)size->root.face; + FT_Size_Metrics* size_metrics = &size->hinted_metrics; size->ttmetrics.valid = FALSE; - size_metrics = &size->hinted_metrics; - /* copy the result from base layer */ *size_metrics = size->root.metrics; @@ -1397,12 +1383,34 @@ size->ttmetrics.valid = TRUE; - if ( only_height ) - { - /* we must not recompute the scaling values here since */ - /* `tt_size_reset' was already called (with only_height = 0) */ - return FT_Err_Ok; - } + return FT_Err_Ok; + } + + + /************************************************************************** + * + * @Function: + * tt_size_reset + * + * @Description: + * Reset a TrueType size when resolutions and character dimensions + * have been changed. + * + * @Input: + * size :: + * A handle to the target size object. + */ + FT_LOCAL_DEF( FT_Error ) + tt_size_reset( TT_Size size ) + { + FT_Error error; + TT_Face face = (TT_Face)size->root.face; + FT_Size_Metrics* size_metrics = &size->hinted_metrics; + + + error = tt_size_reset_height( size ); + if ( error ) + return error; if ( face->header.Flags & 8 ) { |