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Make HB_TINY builds work again by separating the always needed part

This commit is contained in:
Ebrahim Byagowi 2019-07-20 14:50:31 +04:30 committed by Behdad Esfahbod
parent cb70433740
commit 772e62688c
3 changed files with 59 additions and 20 deletions
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12
src/hb-ot-font.cc
View File

@ -234,9 +234,9 @@ hb_ot_get_font_h_extents (hb_font_t *font,
hb_font_extents_t *metrics,
void *user_data HB_UNUSED)
{
return hb_ot_metrics_get_position (font, HB_OT_METRICS_HORIZONTAL_ASCENDER, &metrics->ascender) &&
hb_ot_metrics_get_position (font, HB_OT_METRICS_HORIZONTAL_DESCENDER, &metrics->descender) &&
hb_ot_metrics_get_position (font, HB_OT_METRICS_HORIZONTAL_LINE_GAP, &metrics->line_gap);
return hb_ot_metrics_get_position_common (font, HB_OT_METRICS_HORIZONTAL_ASCENDER, &metrics->ascender) &&
hb_ot_metrics_get_position_common (font, HB_OT_METRICS_HORIZONTAL_DESCENDER, &metrics->descender) &&
hb_ot_metrics_get_position_common (font, HB_OT_METRICS_HORIZONTAL_LINE_GAP, &metrics->line_gap);
}
static hb_bool_t
@ -245,9 +245,9 @@ hb_ot_get_font_v_extents (hb_font_t *font,
hb_font_extents_t *metrics,
void *user_data HB_UNUSED)
{
return hb_ot_metrics_get_position (font, HB_OT_METRICS_VERTICAL_ASCENDER, &metrics->ascender) &&
hb_ot_metrics_get_position (font, HB_OT_METRICS_VERTICAL_DESCENDER, &metrics->descender) &&
hb_ot_metrics_get_position (font, HB_OT_METRICS_VERTICAL_LINE_GAP, &metrics->line_gap);
return hb_ot_metrics_get_position_common (font, HB_OT_METRICS_VERTICAL_ASCENDER, &metrics->ascender) &&
hb_ot_metrics_get_position_common (font, HB_OT_METRICS_VERTICAL_DESCENDER, &metrics->descender) &&
hb_ot_metrics_get_position_common (font, HB_OT_METRICS_VERTICAL_LINE_GAP, &metrics->line_gap);
}
#if HB_USE_ATEXIT

62
src/hb-ot-metrics.cc
View File

@ -24,8 +24,6 @@
#include "hb.hh"
#ifndef HB_NO_METRICS
#include "hb-ot-var-mvar-table.hh"
#include "hb-ot-gasp-table.hh" // Just so we compile it; unused otherwise.
#include "hb-ot-os2-table.hh"
@ -34,6 +32,48 @@
#include "hb-ot-metrics.hh"
#include "hb-ot-face.hh"
/* Common part of _get_position logic needed on hb-ot-font so we
can have a slim builds using HB_NO_METRICS */
bool
hb_ot_metrics_get_position_common (hb_font_t *font,
hb_ot_metrics_t metrics_tag,
hb_position_t *position /* OUT. May be NULL. */)
{
hb_face_t *face = font->face;
switch ((unsigned int) metrics_tag)
{
#ifndef HB_NO_VAR
#define GET_VAR hb_ot_metrics_get_variation (face, metrics_tag)
#else
#define GET_VAR 0
#endif
#define GET_METRIC_X(TABLE, ATTR) \
(face->table.TABLE->has_data () && \
(position && (*position = font->em_scalef_x (face->table.TABLE->ATTR + GET_VAR)), true))
#define GET_METRIC_Y(TABLE, ATTR) \
(face->table.TABLE->has_data () && \
(position && (*position = font->em_scalef_y (face->table.TABLE->ATTR + GET_VAR)), true))
case HB_OT_METRICS_HORIZONTAL_ASCENDER:
return (!face->table.OS2->use_typo_metrics () && GET_METRIC_Y (hhea, ascender)) ||
GET_METRIC_Y (OS2, sTypoAscender);
case HB_OT_METRICS_HORIZONTAL_DESCENDER:
return (!face->table.OS2->use_typo_metrics () && GET_METRIC_Y (hhea, descender)) ||
GET_METRIC_Y (OS2, sTypoDescender);
case HB_OT_METRICS_HORIZONTAL_LINE_GAP:
return (!face->table.OS2->use_typo_metrics () && GET_METRIC_Y (hhea, lineGap)) ||
GET_METRIC_Y (OS2, sTypoLineGap);
case HB_OT_METRICS_VERTICAL_ASCENDER: return GET_METRIC_X (vhea, ascender);
case HB_OT_METRICS_VERTICAL_DESCENDER: return GET_METRIC_X (vhea, descender);
case HB_OT_METRICS_VERTICAL_LINE_GAP: return GET_METRIC_X (vhea, lineGap);
#undef GET_METRIC_Y
#undef GET_METRIC_X
#undef GET_VAR
default: assert (0); return false;
}
}
#ifndef HB_NO_METRICS
#if 0
static bool
_get_gasp (hb_face_t *face, float *result, hb_ot_metrics_t metrics_tag)
@ -64,6 +104,12 @@ hb_ot_metrics_get_position (hb_font_t *font,
hb_face_t *face = font->face;
switch (metrics_tag)
{
case HB_OT_METRICS_HORIZONTAL_ASCENDER:
case HB_OT_METRICS_HORIZONTAL_DESCENDER:
case HB_OT_METRICS_HORIZONTAL_LINE_GAP:
case HB_OT_METRICS_VERTICAL_ASCENDER:
case HB_OT_METRICS_VERTICAL_DESCENDER:
case HB_OT_METRICS_VERTICAL_LINE_GAP: return hb_ot_metrics_get_position_common (font, metrics_tag, position);
#ifndef HB_NO_VAR
#define GET_VAR hb_ot_metrics_get_variation (face, metrics_tag)
#else
@ -75,18 +121,6 @@ hb_ot_metrics_get_position (hb_font_t *font,
#define GET_METRIC_Y(TABLE, ATTR) \
(face->table.TABLE->has_data () && \
(position && (*position = font->em_scalef_y (face->table.TABLE->ATTR + GET_VAR)), true))
case HB_OT_METRICS_HORIZONTAL_ASCENDER:
return (!face->table.OS2->use_typo_metrics () && GET_METRIC_Y (hhea, ascender)) ||
GET_METRIC_Y (OS2, sTypoAscender);
case HB_OT_METRICS_HORIZONTAL_DESCENDER:
return (!face->table.OS2->use_typo_metrics () && GET_METRIC_Y (hhea, descender)) ||
GET_METRIC_Y (OS2, sTypoDescender);
case HB_OT_METRICS_HORIZONTAL_LINE_GAP:
return (!face->table.OS2->use_typo_metrics () && GET_METRIC_Y (hhea, lineGap)) ||
GET_METRIC_Y (OS2, sTypoLineGap);
case HB_OT_METRICS_VERTICAL_ASCENDER: return GET_METRIC_X (vhea, ascender);
case HB_OT_METRICS_VERTICAL_DESCENDER: return GET_METRIC_X (vhea, descender);
case HB_OT_METRICS_VERTICAL_LINE_GAP: return GET_METRIC_X (vhea, lineGap);
case HB_OT_METRICS_HORIZONTAL_CLIPPING_ASCENT: return GET_METRIC_Y (OS2, usWinAscent);
case HB_OT_METRICS_HORIZONTAL_CLIPPING_DESCENT: return GET_METRIC_Y (OS2, usWinDescent);
case HB_OT_METRICS_HORIZONTAL_CARET_RISE: return GET_METRIC_Y (hhea, caretSlopeRise);

5
src/hb-ot-metrics.hh
View File

@ -27,4 +27,9 @@
#include "hb.hh"
HB_INTERNAL bool
hb_ot_metrics_get_position_common (hb_font_t *font,
hb_ot_metrics_t metrics_tag,
hb_position_t *position /* OUT. May be NULL. */);
#endif /* HB_OT_METRICS_HH */