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Remove unused SUBPIXEL_RENDERING code

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This commit is contained in:
UnknownShadow200 2020-03-21 16:57:43 +11:00
parent 4a4c0c9ddd
commit 1d6d79a864
5 changed files with 0 additions and 133 deletions
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8
src/freetype/freetype.h
View File

@ -3032,14 +3032,6 @@ FT_BEGIN_HEADER
/* glyph outline in pixels and use the @FT_PIXEL_MODE_LCD_V mode. */
/* */
/* <Note> */
/* Should you define FT_CONFIG_OPTION_SUBPIXEL_RENDERING in your */
/* `ftoption.h', which enables patented ClearType-style rendering, */
/* the LCD-optimized glyph bitmaps should be filtered to reduce color */
/* fringes inherent to this technology. You can either set up LCD */
/* filtering with @FT_Library_SetLcdFilter or @FT_Face_Properties, */
/* or do the filtering yourself. The default FreeType LCD rendering */
/* technology does not require filtering. */
/* */
/* The selected render mode only affects vector glyphs of a font. */
/* Embedded bitmaps often have a different pixel mode like */
/* @FT_PIXEL_MODE_MONO. You can use @FT_Bitmap_Convert to transform */

15
src/freetype/ftobjs.c
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@ -1864,11 +1864,6 @@
internal->refcount = 1;
internal->no_stem_darkening = -1;
#ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING
/* Per-face filtering can only be set up by FT_Face_Properties */
internal->lcd_filter_func = NULL;
#endif
}
if ( aface )
@ -2877,18 +2872,8 @@
}
else if ( properties->tag == FT_PARAM_TAG_LCD_FILTER_WEIGHTS )
{
#ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING
if ( properties->data )
{
ft_memcpy( face->internal->lcd_weights,
properties->data,
FT_LCD_FILTER_FIVE_TAPS );
face->internal->lcd_filter_func = ft_lcd_filter_fir;
}
#else
error = FT_THROW( Unimplemented_Feature );
goto Exit;
#endif
}
else if ( properties->tag == FT_PARAM_TAG_RANDOM_SEED )
{

31
src/freetype/ftobjs.h
View File

@ -270,27 +270,6 @@ FT_BEGIN_HEADER
FT_CMap_Done( FT_CMap cmap );
/* adds LCD padding to Min and Max boundaries */
FT_BASE( void )
ft_lcd_padding( FT_Pos* Min,
FT_Pos* Max,
FT_GlyphSlot slot );
#ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING
typedef void (*FT_Bitmap_LcdFilterFunc)( FT_Bitmap* bitmap,
FT_Render_Mode render_mode,
FT_Byte* weights );
/* This is the default LCD filter, an in-place, 5-tap FIR filter. */
FT_BASE( void )
ft_lcd_filter_fir( FT_Bitmap* bitmap,
FT_Render_Mode mode,
FT_LcdFiveTapFilter weights );
#endif /* FT_CONFIG_OPTION_SUBPIXEL_RENDERING */
/*************************************************************************/
/* */
/* <Struct> */
@ -374,11 +353,6 @@ FT_BEGIN_HEADER
FT_Char no_stem_darkening;
FT_Int32 random_seed;
#ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING
FT_LcdFiveTapFilter lcd_weights; /* filter weights, if any */
FT_Bitmap_LcdFilterFunc lcd_filter_func; /* filtering callback */
#endif
FT_Int refcount;
} FT_Face_InternalRec;
@ -888,11 +862,6 @@ FT_BEGIN_HEADER
FT_DebugHook_Func debug_hooks[4];
#ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING
FT_LcdFiveTapFilter lcd_weights; /* filter weights, if any */
FT_Bitmap_LcdFilterFunc lcd_filter_func; /* filtering callback */
#endif
FT_Int refcount;
} FT_LibraryRec;

17
src/freetype/ftoption.h
View File

@ -108,23 +108,6 @@ FT_BEGIN_HEADER
#undef FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES
/*************************************************************************/
/* */
/* Uncomment the line below if you want to activate LCD rendering */
/* technology similar to ClearType in this build of the library. This */
/* technology triples the resolution in the direction color subpixels. */
/* To mitigate color fringes inherent to this technology, you also need */
/* to explicitly set up LCD filtering. */
/* */
/* Note that this feature is covered by several Microsoft patents */
/* and should not be activated in any default build of the library. */
/* When this macro is not defined, FreeType offers alternative LCD */
/* rendering technology that produces excellent output without LCD */
/* filtering. */
/* */
/* #define FT_CONFIG_OPTION_SUBPIXEL_RENDERING */
/*************************************************************************/
/* */
/* Many compilers provide a non-ANSI 64-bit data type that can be used */

62
src/freetype/ftsmooth.c
View File

@ -160,68 +160,6 @@
params.flags = FT_RASTER_FLAG_AA;
#ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING
/* implode outline if needed */
{
FT_Vector* points = outline->points;
FT_Vector* points_end = points + outline->n_points;
FT_Vector* vec;
if ( hmul )
for ( vec = points; vec < points_end; vec++ )
vec->x *= 3;
if ( vmul )
for ( vec = points; vec < points_end; vec++ )
vec->y *= 3;
}
/* render outline into the bitmap */
error = render->raster_render( render->raster, &params );
/* deflate outline if needed */
{
FT_Vector* points = outline->points;
FT_Vector* points_end = points + outline->n_points;
FT_Vector* vec;
if ( hmul )
for ( vec = points; vec < points_end; vec++ )
vec->x /= 3;
if ( vmul )
for ( vec = points; vec < points_end; vec++ )
vec->y /= 3;
}
if ( error )
goto Exit;
/* finally apply filtering */
if ( hmul || vmul )
{
FT_Byte* lcd_weights;
FT_Bitmap_LcdFilterFunc lcd_filter_func;
/* Per-face LCD filtering takes priority if set up. */
if ( slot->face && slot->face->internal->lcd_filter_func )
{
lcd_weights = slot->face->internal->lcd_weights;
lcd_filter_func = slot->face->internal->lcd_filter_func;
}
else
{
lcd_weights = slot->library->lcd_weights;
lcd_filter_func = slot->library->lcd_filter_func;
}
if ( lcd_filter_func )
lcd_filter_func( bitmap, mode, lcd_weights );
}
#else /* !FT_CONFIG_OPTION_SUBPIXEL_RENDERING */
if ( hmul ) /* lcd */