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Change ptem API to make 0 mean unset

This commit is contained in:
Behdad Esfahbod 2017-10-11 15:37:50 +02:00
parent 06c14225b2
commit 374bb48d90
2 changed files with 3 additions and 4 deletions
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5
src/hb-font.cc
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@ -1124,7 +1124,6 @@ hb_font_create (hb_face_t *face)
font->parent = hb_font_get_empty ();
font->face = hb_face_reference (face);
font->klass = hb_font_funcs_get_empty ();
font->ptem = -1;
font->x_scale = font->y_scale = hb_face_get_upem (face);
@ -1201,7 +1200,7 @@ hb_font_get_empty (void)
0, /* x_ppem */
0, /* y_ppem */
-1, /* ptem */
0, /* ptem */
0, /* num_coords */
NULL, /* coords */
@ -1598,7 +1597,7 @@ hb_font_set_ptem (hb_font_t *font, float ptem)
* hb_font_get_ptem:
* @font: a font.
*
* Gets the "point size" of the font. A value of -1 means unset.
* Gets the "point size" of the font. A value of 0 means unset.
*
* Return value: Point size.
*

2
src/hb-font.h
View File

@ -609,7 +609,7 @@ hb_font_get_ppem (hb_font_t *font,
/*
* Point size per EM. Used for optical-sizing in CoreText.
* A -1 means "not set".
* A value of zero means "not set".
*/
HB_EXTERN void
hb_font_set_ptem (hb_font_t *font, float ptem);