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-rw-r--r--src/3rdparty/freetype/src/base/ftlcdfil.c127
1 files changed, 91 insertions, 36 deletions
diff --git a/src/3rdparty/freetype/src/base/ftlcdfil.c b/src/3rdparty/freetype/src/base/ftlcdfil.c
index 8d314df080..d9f4af4293 100644
--- a/src/3rdparty/freetype/src/base/ftlcdfil.c
+++ b/src/3rdparty/freetype/src/base/ftlcdfil.c
@@ -1,19 +1,19 @@
-/***************************************************************************/
-/* */
-/* ftlcdfil.c */
-/* */
-/* FreeType API for color filtering of subpixel bitmap glyphs (body). */
-/* */
-/* Copyright 2006-2018 by */
-/* David Turner, Robert Wilhelm, and Werner Lemberg. */
-/* */
-/* This file is part of the FreeType project, and may only be used, */
-/* modified, and distributed under the terms of the FreeType project */
-/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
-/* this file you indicate that you have read the license and */
-/* understand and accept it fully. */
-/* */
-/***************************************************************************/
+/****************************************************************************
+ *
+ * ftlcdfil.c
+ *
+ * FreeType API for color filtering of subpixel bitmap glyphs (body).
+ *
+ * Copyright (C) 2006-2019 by
+ * David Turner, Robert Wilhelm, and Werner Lemberg.
+ *
+ * This file is part of the FreeType project, and may only be used,
+ * modified, and distributed under the terms of the FreeType project
+ * license, LICENSE.TXT. By continuing to use, modify, or distribute
+ * this file you indicate that you have read the license and
+ * understand and accept it fully.
+ *
+ */
#include <ft2build.h>
@@ -34,9 +34,9 @@
/* add padding according to filter weights */
FT_BASE_DEF (void)
- ft_lcd_padding( FT_Pos* Min,
- FT_Pos* Max,
- FT_GlyphSlot slot )
+ ft_lcd_padding( FT_BBox* cbox,
+ FT_GlyphSlot slot,
+ FT_Render_Mode mode )
{
FT_Byte* lcd_weights;
FT_Bitmap_LcdFilterFunc lcd_filter_func;
@@ -56,10 +56,20 @@
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;
+ if ( mode == FT_RENDER_MODE_LCD )
+ {
+ cbox->xMin -= lcd_weights[0] ? 43 :
+ lcd_weights[1] ? 22 : 0;
+ cbox->xMax += lcd_weights[4] ? 43 :
+ lcd_weights[3] ? 22 : 0;
+ }
+ else if ( mode == FT_RENDER_MODE_LCD_V )
+ {
+ cbox->yMin -= lcd_weights[0] ? 43 :
+ lcd_weights[1] ? 22 : 0;
+ cbox->yMax += lcd_weights[4] ? 43 :
+ lcd_weights[3] ? 22 : 0;
+ }
}
}
@@ -67,13 +77,13 @@
/* FIR filter used by the default and light filters */
FT_BASE_DEF( void )
ft_lcd_filter_fir( FT_Bitmap* bitmap,
- FT_Render_Mode mode,
FT_LcdFiveTapFilter weights )
{
FT_UInt width = (FT_UInt)bitmap->width;
FT_UInt height = (FT_UInt)bitmap->rows;
FT_Int pitch = bitmap->pitch;
FT_Byte* origin = bitmap->buffer;
+ FT_Byte mode = bitmap->pixel_mode;
/* take care of bitmap flow */
@@ -81,7 +91,7 @@
origin += pitch * (FT_Int)( height - 1 );
/* horizontal in-place FIR filter */
- if ( mode == FT_RENDER_MODE_LCD && width >= 2 )
+ if ( mode == FT_PIXEL_MODE_LCD && width >= 2 )
{
FT_Byte* line = origin;
@@ -124,7 +134,7 @@
}
/* vertical in-place FIR filter */
- else if ( mode == FT_RENDER_MODE_LCD_V && height >= 2 )
+ else if ( mode == FT_PIXEL_MODE_LCD_V && height >= 2 )
{
FT_Byte* column = origin;
@@ -173,13 +183,13 @@
/* intra-pixel filter used by the legacy filter */
static void
_ft_lcd_filter_legacy( FT_Bitmap* bitmap,
- FT_Render_Mode mode,
FT_Byte* weights )
{
FT_UInt width = (FT_UInt)bitmap->width;
FT_UInt height = (FT_UInt)bitmap->rows;
FT_Int pitch = bitmap->pitch;
FT_Byte* origin = bitmap->buffer;
+ FT_Byte mode = bitmap->pixel_mode;
static const unsigned int filters[3][3] =
{
@@ -196,7 +206,7 @@
origin += pitch * (FT_Int)( height - 1 );
/* horizontal in-place intra-pixel filter */
- if ( mode == FT_RENDER_MODE_LCD && width >= 3 )
+ if ( mode == FT_PIXEL_MODE_LCD && width >= 3 )
{
FT_Byte* line = origin;
@@ -233,7 +243,7 @@
}
}
}
- else if ( mode == FT_RENDER_MODE_LCD_V && height >= 3 )
+ else if ( mode == FT_PIXEL_MODE_LCD_V && height >= 3 )
{
FT_Byte* column = origin;
@@ -275,6 +285,8 @@
#endif /* USE_LEGACY */
+ /* documentation in ftlcdfil.h */
+
FT_EXPORT_DEF( FT_Error )
FT_Library_SetLcdFilterWeights( FT_Library library,
unsigned char *weights )
@@ -292,6 +304,8 @@
}
+ /* documentation in ftlcdfil.h */
+
FT_EXPORT_DEF( FT_Error )
FT_Library_SetLcdFilter( FT_Library library,
FT_LcdFilter filter )
@@ -341,18 +355,41 @@
return FT_Err_Ok;
}
+
+ FT_EXPORT_DEF( FT_Error )
+ FT_Library_SetLcdGeometry( FT_Library library,
+ FT_Vector* sub )
+ {
+ FT_UNUSED( library );
+ FT_UNUSED( sub );
+
+ return FT_THROW( Unimplemented_Feature );
+ }
+
#else /* !FT_CONFIG_OPTION_SUBPIXEL_RENDERING */
- /* add padding according to accommodate outline shifts */
+ /* add padding to accommodate outline shifts */
FT_BASE_DEF (void)
- ft_lcd_padding( FT_Pos* Min,
- FT_Pos* Max,
- FT_GlyphSlot slot )
+ ft_lcd_padding( FT_BBox* cbox,
+ FT_GlyphSlot slot,
+ FT_Render_Mode mode )
{
- FT_UNUSED( slot );
+ FT_Vector* sub = slot->library->lcd_geometry;
- *Min -= 21;
- *Max += 21;
+ if ( mode == FT_RENDER_MODE_LCD )
+ {
+ cbox->xMin -= FT_MAX( FT_MAX( sub[0].x, sub[1].x ), sub[2].x );
+ cbox->xMax -= FT_MIN( FT_MIN( sub[0].x, sub[1].x ), sub[2].x );
+ cbox->yMin -= FT_MAX( FT_MAX( sub[0].y, sub[1].y ), sub[2].y );
+ cbox->yMax -= FT_MIN( FT_MIN( sub[0].y, sub[1].y ), sub[2].y );
+ }
+ else if ( mode == FT_RENDER_MODE_LCD_V )
+ {
+ cbox->xMin -= FT_MAX( FT_MAX( sub[0].y, sub[1].y ), sub[2].y );
+ cbox->xMax -= FT_MIN( FT_MIN( sub[0].y, sub[1].y ), sub[2].y );
+ cbox->yMin += FT_MIN( FT_MIN( sub[0].x, sub[1].x ), sub[2].x );
+ cbox->yMax += FT_MAX( FT_MAX( sub[0].x, sub[1].x ), sub[2].x );
+ }
}
@@ -377,6 +414,24 @@
return FT_THROW( Unimplemented_Feature );
}
+
+ /* documentation in ftlcdfil.h */
+
+ FT_EXPORT_DEF( FT_Error )
+ FT_Library_SetLcdGeometry( FT_Library library,
+ FT_Vector sub[3] )
+ {
+ if ( !library )
+ return FT_THROW( Invalid_Library_Handle );
+
+ if ( !sub )
+ return FT_THROW( Invalid_Argument );
+
+ ft_memcpy( library->lcd_geometry, sub, 3 * sizeof( FT_Vector ) );
+
+ return FT_THROW( Unimplemented_Feature );
+ }
+
#endif /* !FT_CONFIG_OPTION_SUBPIXEL_RENDERING */
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