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Code Issues 9 Releases Wiki Activity

Minor documentation improvements.

This commit is contained in:
Nikolaus Waxweiler 2015-11-28 18:07:53 +01:00 committed by Werner Lemberg
parent 01ce1c6a99
commit 25b1330a4d
2 changed files with 7 additions and 4 deletions
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7
include/freetype/freetype.h
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@ -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 */

4
include/freetype/ftlcdfil.h
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@ -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