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| author | Nikolaus Waxweiler <madigens@gmail.com> | 2015-11-28 18:07:53 +0100 |
|---|---|---|
| committer | Werner Lemberg <wl@gnu.org> | 2015-11-28 18:07:53 +0100 |
| commit | 25b1330a4debea616a0da3c506fa090f1df9e54a (patch) | |
| tree | 073278fbe8c5c509c5d46473151ab397fe9385cc /include/freetype | |
| parent | 01ce1c6a9959b745c40707970c71fb971dfafa37 (diff) | |
| download | freetype2-25b1330a4debea616a0da3c506fa090f1df9e54a.tar.gz | |
Minor documentation improvements.
Diffstat (limited to 'include/freetype')
| -rw-r--r-- | include/freetype/freetype.h | 7 | ||||
| -rw-r--r-- | 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 c0e5112ac..80bc5f371 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 91facf92b..653ed3669 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 |