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Diffstat (limited to 'Build/source/libs/freetype2/freetype-src/src/base/ftlcdfil.c')
-rw-r--r--Build/source/libs/freetype2/freetype-src/src/base/ftlcdfil.c55
1 files changed, 44 insertions, 11 deletions
diff --git a/Build/source/libs/freetype2/freetype-src/src/base/ftlcdfil.c b/Build/source/libs/freetype2/freetype-src/src/base/ftlcdfil.c
index 60c813fd9e0..5c38911a907 100644
--- a/Build/source/libs/freetype2/freetype-src/src/base/ftlcdfil.c
+++ b/Build/source/libs/freetype2/freetype-src/src/base/ftlcdfil.c
@@ -4,7 +4,7 @@
/* */
/* FreeType API for color filtering of subpixel bitmap glyphs (body). */
/* */
-/* Copyright 2006-2017 by */
+/* Copyright 2006-2018 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
@@ -31,8 +31,41 @@
#define FT_SHIFTCLAMP( x ) ( x >>= 8, (FT_Byte)( x > 255 ? 255 : x ) )
+
+ /* add padding according to filter weights */
+ FT_BASE_DEF (void)
+ ft_lcd_padding( FT_Pos* Min,
+ FT_Pos* Max,
+ FT_GlyphSlot slot )
+ {
+ 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 == ft_lcd_filter_fir )
+ {
+ *Min -= lcd_weights[0] ? 43 :
+ lcd_weights[1] ? 22 : 0;
+ *Max += lcd_weights[4] ? 43 :
+ lcd_weights[3] ? 22 : 0;
+ }
+ }
+
+
/* FIR filter used by the default and light filters */
- FT_BASE( void )
+ FT_BASE_DEF( void )
ft_lcd_filter_fir( FT_Bitmap* bitmap,
FT_Render_Mode mode,
FT_LcdFiveTapFilter weights )
@@ -305,21 +338,21 @@
return FT_THROW( Invalid_Argument );
}
- library->lcd_filter = filter;
-
return FT_Err_Ok;
}
#else /* !FT_CONFIG_OPTION_SUBPIXEL_RENDERING */
- FT_BASE( void )
- ft_lcd_filter_fir( FT_Bitmap* bitmap,
- FT_Render_Mode mode,
- FT_LcdFiveTapFilter weights )
+ /* add padding according to accommodate outline shifts */
+ FT_BASE_DEF (void)
+ ft_lcd_padding( FT_Pos* Min,
+ FT_Pos* Max,
+ FT_GlyphSlot slot )
{
- FT_UNUSED( bitmap );
- FT_UNUSED( mode );
- FT_UNUSED( weights );
+ FT_UNUSED( slot );
+
+ *Min -= 21;
+ *Max += 21;
}