Commit 4c93399155e88c415df05a46a14625ebf95c5ddc
2008-01-18T05:32:55
* src/base/ftlcdfil.c (_ft_lcd_filter_legacy): Updated comment to mention intra-pixel algorithm. * include/freetype/freetype.h (FT_Render_Mode): Mention that FT_Library_SetLcdFilter can be used to reduce fringes.
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diff --git a/ChangeLog b/ChangeLog
index 69263fe..ba23ece 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2008-01-18 Sylvain Pasche <sylvain.pasche@gmail.com>
+
+ * src/base/ftlcdfil.c (_ft_lcd_filter_legacy): Updated comment to
+ mention intra-pixel algorithm.
+
+ * include/freetype/freetype.h (FT_Render_Mode): Mention that
+ FT_Library_SetLcdFilter can be used to reduce fringes.
+
2008-01-16 Werner Lemberg <wl@gnu.org>
* src/raster/ftraster.c (ft_black_render): Check `outline' before
@@ -2923,7 +2931,7 @@
----------------------------------------------------------------------------
-Copyright 2006, 2007 by
+Copyright 2006, 2007, 2008 by
David Turner, Robert Wilhelm, and Werner Lemberg.
This file is part of the FreeType project, and may only be used, modified,
diff --git a/include/freetype/freetype.h b/include/freetype/freetype.h
index 0a013e8..fcafdc3 100644
--- a/include/freetype/freetype.h
+++ b/include/freetype/freetype.h
@@ -4,7 +4,7 @@
/* */
/* FreeType high-level API and common types (specification only). */
/* */
-/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007 by */
+/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
@@ -2545,9 +2545,11 @@ FT_BEGIN_HEADER
/* glyph outline in pixels and use the @FT_PIXEL_MODE_LCD_V mode. */
/* */
/* <Note> */
- /* The LCD-optimized glyph bitmaps produced by FT_Render_Glyph are */
- /* _not_ _filtered_ to reduce color-fringes. It is up to the caller */
- /* to perform this pass. */
+ /* The LCD-optimized glyph bitmaps produced by FT_Render_Glyph can be */
+ /* filtered to reduce color-fringes by using @FT_Library_SetLcdFilter */
+ /* (not active in the default builds). It is up to the caller to */
+ /* either call @FT_Library_SetLcdFilter (if available) or do the */
+ /* filtering itself. */
/* */
typedef enum FT_Render_Mode_
{
diff --git a/src/base/ftlcdfil.c b/src/base/ftlcdfil.c
index f40bbea..5f1fa0b 100644
--- a/src/base/ftlcdfil.c
+++ b/src/base/ftlcdfil.c
@@ -4,7 +4,7 @@
/* */
/* FreeType API for color filtering of subpixel bitmap glyphs (body). */
/* */
-/* Copyright 2006 by */
+/* Copyright 2006, 2008 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
@@ -161,7 +161,7 @@
#ifdef USE_LEGACY
- /* FIR filter used by the default and light filters */
+ /* intra-pixel filter used by the legacy filter */
static void
_ft_lcd_filter_legacy( FT_Bitmap* bitmap,
FT_Render_Mode mode,
@@ -181,7 +181,7 @@
FT_UNUSED( library );
- /* horizontal in-place FIR filter */
+ /* horizontal in-place intra-pixel filter */
if ( mode == FT_RENDER_MODE_LCD && width >= 3 )
{
FT_Byte* line = bitmap->buffer;