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[truetype] Reduce v40 footprint.

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*  src/truetype/ttgload.c (TT_HInt_Glyph, tt_loader_set_pp,
tt_loader_init): Refactor code.
This commit is contained in:
Alexei Podtelezhnikov 2023-07-28 22:35:58 -04:00
parent 1ecfd21990
commit b2584c738f
1 changed files with 31 additions and 44 deletions
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75
src/truetype/ttgload.c
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@ -852,22 +852,21 @@
#endif
#ifdef TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL
/* Save possibly modified glyph phantom points unless in v40 backward */
/* compatibility mode, where no movement on the x axis means no reason */
/* to change bearings or advance widths. */
if ( !( driver->interpreter_version == TT_INTERPRETER_VERSION_40 &&
exec->backward_compatibility ) )
{
#endif
loader->pp1 = zone->cur[zone->n_points - 4];
loader->pp2 = zone->cur[zone->n_points - 3];
loader->pp3 = zone->cur[zone->n_points - 2];
loader->pp4 = zone->cur[zone->n_points - 1];
#ifdef TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL
}
if ( driver->interpreter_version == TT_INTERPRETER_VERSION_40 &&
exec->backward_compatibility )
return FT_Err_Ok;
#endif
loader->pp1 = zone->cur[zone->n_points - 4];
loader->pp2 = zone->cur[zone->n_points - 3];
loader->pp3 = zone->cur[zone->n_points - 2];
loader->pp4 = zone->cur[zone->n_points - 1];
return FT_Err_Ok;
}
@ -1365,36 +1364,31 @@
static void
tt_loader_set_pp( TT_Loader loader )
{
FT_Bool subpixel_hinting = 0;
FT_Bool grayscale = 0;
FT_Bool use_aw_2 = 0;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
TT_Driver driver = (TT_Driver)FT_FACE_DRIVER( loader->face );
#endif
#ifdef TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL
if ( driver->interpreter_version == TT_INTERPRETER_VERSION_40 )
{
subpixel_hinting = loader->exec ? loader->exec->subpixel_hinting_lean
: 0;
grayscale = loader->exec ? loader->exec->grayscale_cleartype
: 0;
}
#endif
use_aw_2 = FT_BOOL( subpixel_hinting && grayscale );
loader->pp1.x = loader->bbox.xMin - loader->left_bearing;
loader->pp1.y = 0;
loader->pp2.x = loader->pp1.x + loader->advance;
loader->pp2.y = 0;
loader->pp3.x = use_aw_2 ? loader->advance / 2 : 0;
loader->pp3.x = 0;
loader->pp3.y = loader->bbox.yMax + loader->top_bearing;
loader->pp4.x = use_aw_2 ? loader->advance / 2 : 0;
loader->pp4.x = 0;
loader->pp4.y = loader->pp3.y - loader->vadvance;
#ifdef TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL
{
TT_Driver driver = (TT_Driver)FT_FACE_DRIVER( loader->face );
if ( driver->interpreter_version == TT_INTERPRETER_VERSION_40 &&
loader->exec &&
loader->exec->subpixel_hinting_lean &&
loader->exec->grayscale_cleartype )
{
loader->pp3.x = loader->advance / 2;
loader->pp4.x = loader->advance / 2;
}
}
#endif
}
@ -2221,6 +2215,9 @@
if ( !exec )
return FT_THROW( Could_Not_Find_Context );
grayscale = FT_BOOL( FT_LOAD_TARGET_MODE( load_flags ) !=
FT_RENDER_MODE_MONO );
#ifdef TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL
if ( driver->interpreter_version == TT_INTERPRETER_VERSION_40 )
{
@ -2237,6 +2234,7 @@
FT_BOOL( subpixel_hinting_lean &&
( load_flags &
FT_LOAD_TARGET_LCD_V ) );
grayscale = FT_BOOL( grayscale && !subpixel_hinting_lean );
}
else
{
@ -2246,22 +2244,11 @@
}
#endif
#ifdef TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL
if ( driver->interpreter_version == TT_INTERPRETER_VERSION_40 )
grayscale = FT_BOOL( !subpixel_hinting_lean &&
FT_LOAD_TARGET_MODE( load_flags ) !=
FT_RENDER_MODE_MONO );
else
#endif
grayscale = FT_BOOL( FT_LOAD_TARGET_MODE( load_flags ) !=
FT_RENDER_MODE_MONO );
error = TT_Load_Context( exec, face, size );
if ( error )
return error;
{
#ifdef TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL
if ( driver->interpreter_version == TT_INTERPRETER_VERSION_40 )
{