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color: Document empty returns (#3362) 

Document that the SVG and PNG getters return
the singleton empty blob if the glyph has no
color.

Fixes: #1413

Co-authored-by: Matthias Clasen <mclasen@redhat.com>
This commit is contained in:
Matthias Clasen 2022-01-12 13:07:25 -05:00 committed by GitHub
parent 13643934aa
commit befe3b5d5a
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1 changed files with 8 additions and 4 deletions
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src/hb-ot-color.cc
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@ -256,6 +256,8 @@ hb_ot_color_has_svg (hb_face_t *face)
*
* Fetches the SVG document for a glyph. The blob may be either plain text or gzip-encoded.
*
* If the glyph has no SVG document, the singleton empty blob is returned.
*
* Return value: (transfer full): An #hb_blob_t containing the SVG document of the glyph, if available
*
* Since: 2.1.0
@ -296,6 +298,8 @@ hb_ot_color_has_png (hb_face_t *face)
* as input. To get an optimally sized PNG blob, the UPEM value must be set on the @font
* object. If UPEM is unset, the blob returned will be the largest PNG available.
*
* If the glyph has no PNG image, the singleton empty blob is returned.
*
* Return value: (transfer full): An #hb_blob_t containing the PNG image for the glyph, if available
*
* Since: 2.1.0