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[freetype2] master 25b1330: Minor documentation improvements.
From: |
Werner LEMBERG |
Subject: |
[freetype2] master 25b1330: Minor documentation improvements. |
Date: |
Sat, 28 Nov 2015 17:09:12 +0000 |
branch: master
commit 25b1330a4debea616a0da3c506fa090f1df9e54a
Author: Nikolaus Waxweiler <address@hidden>
Commit: Werner Lemberg <address@hidden>
Minor documentation improvements.
---
include/freetype/freetype.h | 7 ++++---
include/freetype/ftlcdfil.h | 4 +++-
2 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/include/freetype/freetype.h b/include/freetype/freetype.h
index c0e5112..80bc5f3 100644
--- a/include/freetype/freetype.h
+++ b/include/freetype/freetype.h
@@ -3068,8 +3068,8 @@ FT_BEGIN_HEADER
/* and apply gamma to get them in a linear space, */
/* */
/* 2. use OVER to blend the two linear colors using the glyph pixel */
- /* as the alpha value (remember, the glyph bitmap is a coverage */
- /* bitmap), and */
+ /* as the alpha value (remember, the glyph bitmap is an alpha */
+ /* coverage bitmap), and */
/* */
/* 3. apply inverse gamma to the blended pixel and write it back to */
/* the image. */
@@ -3089,7 +3089,8 @@ FT_BEGIN_HEADER
/* gives equal weight to the three color primaries and does not */
/* exceed a sum of 0x100, see section @lcd_filtering. Then the */
/* only difference to gray linear blending is that subpixel-rendered */
- /* linear blending is done 3~times per pixel. */
+ /* linear blending is done 3~times per pixel: red foreground subpixel */
+ /* to red background subpixel and so on for green and blue. */
/* */
/* <InOut> */
/* slot :: A handle to the glyph slot containing the image to */
diff --git a/include/freetype/ftlcdfil.h b/include/freetype/ftlcdfil.h
index 91facf9..653ed36 100644
--- a/include/freetype/ftlcdfil.h
+++ b/include/freetype/ftlcdfil.h
@@ -50,7 +50,9 @@ FT_BEGIN_HEADER
* subpixels are color pixels, using them unfiltered creates severe
* color fringes. Use the @FT_Library_SetLcdFilter API to specify a
* low-pass filter, which is then applied to subpixel-rendered bitmaps
- * generated through @FT_Render_Glyph.
+ * generated through @FT_Render_Glyph. The filter sacrifices some of
+ * the higher resolution to reduce color fringes, making the glyph image
+ * slightly blurrier. Positional improvements will remain.
*
* Note that no filter is active by default, and that this function is
* *not* implemented in default builds of the library. You need to
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