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[colr] Add more docs

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State explicitly that palette entries are
unpremultipled, and link to the spec.
This commit is contained in:
Matthias Clasen 2022-12-23 00:18:40 -05:00 • committed by Behdad Esfahbod
parent a02c2a911c
commit a634f6b486
1 changed files with 4 additions and 0 deletions
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4
src/hb-ot-color.cc
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@ -167,6 +167,10 @@ hb_ot_color_palette_get_flags (hb_face_t *face,
* for allocating a buffer of suitable size before calling
* hb_ot_color_palette_get_colors() a second time.
*
* The RGBA values in the palette are unpremultiplied. See the
* OpenType spec [CPAL](https://learn.microsoft.com/en-us/typography/opentype/spec/cpal)
* section for details.
*
* Return value: the total number of colors in the palette
*
* Since: 2.1.0