#include "hb-open-type.hh"
#include "hb-ot-os2-unicode-ranges.hh"
+#include "hb-ot-var-mvar-table.hh"
#include "hb-set.hh"
bool has_data () const { return sxHeight || sCapHeight; }
const OS2V2Tail * operator -> () const { return this; }
+ OS2V2Tail * operator -> () { return this; }
bool sanitize (hb_sanitize_context_t *c) const
{
}
}
+ float map_wdth_to_widthclass(float width) const
+ {
+ if (width < 50) return 1.0f;
+ if (width > 200) return 9.0f;
+
+ float ratio = (width - 50) / 12.5f;
+ int a = (int) floorf (ratio);
+ int b = (int) ceilf (ratio);
+
+ /* follow this maping:
+ * https://docs.microsoft.com/en-us/typography/opentype/spec/os2#uswidthclass
+ */
+ if (b <= 6) // 50-125
+ {
+ if (a == b) return a + 1.0f;
+ }
+ else if (b == 7) // no mapping for 137.5
+ {
+ a = 6;
+ b = 8;
+ }
+ else if (b == 8)
+ {
+ if (a == b) return 8.0f; // 150
+ a = 6;
+ }
+ else
+ {
+ if (a == b && a == 12) return 9.0f; //200
+ b = 12;
+ a = 8;
+ }
+
+ float va = 50 + a * 12.5f;
+ float vb = 50 + b * 12.5f;
+
+ float ret = a + (width - va) / (vb - va);
+ if (a <= 6) ret += 1.0f;
+ return ret;
+ }
+
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
OS2 *os2_prime = c->serializer->embed (this);
if (unlikely (!os2_prime)) return_trace (false);
+
+#ifndef HB_NO_VAR
+ if (c->plan->normalized_coords)
+ {
+ auto &MVAR = *c->plan->source->table.MVAR;
+ auto *table = os2_prime;
+
+ HB_ADD_MVAR_VAR (HB_OT_METRICS_TAG_HORIZONTAL_ASCENDER, sTypoAscender);
+ HB_ADD_MVAR_VAR (HB_OT_METRICS_TAG_HORIZONTAL_DESCENDER, sTypoDescender);
+ HB_ADD_MVAR_VAR (HB_OT_METRICS_TAG_HORIZONTAL_LINE_GAP, sTypoLineGap);
+ HB_ADD_MVAR_VAR (HB_OT_METRICS_TAG_HORIZONTAL_CLIPPING_ASCENT, usWinAscent);
+ HB_ADD_MVAR_VAR (HB_OT_METRICS_TAG_HORIZONTAL_CLIPPING_DESCENT, usWinDescent);
+ HB_ADD_MVAR_VAR (HB_OT_METRICS_TAG_SUBSCRIPT_EM_X_SIZE, ySubscriptXSize);
+ HB_ADD_MVAR_VAR (HB_OT_METRICS_TAG_SUBSCRIPT_EM_Y_SIZE, ySubscriptYSize);
+ HB_ADD_MVAR_VAR (HB_OT_METRICS_TAG_SUBSCRIPT_EM_X_OFFSET, ySubscriptXOffset);
+ HB_ADD_MVAR_VAR (HB_OT_METRICS_TAG_SUBSCRIPT_EM_Y_OFFSET, ySubscriptYOffset);
+ HB_ADD_MVAR_VAR (HB_OT_METRICS_TAG_SUPERSCRIPT_EM_X_SIZE, ySuperscriptXSize);
+ HB_ADD_MVAR_VAR (HB_OT_METRICS_TAG_SUPERSCRIPT_EM_Y_SIZE, ySuperscriptYSize);
+ HB_ADD_MVAR_VAR (HB_OT_METRICS_TAG_SUPERSCRIPT_EM_X_OFFSET, ySuperscriptXOffset);
+ HB_ADD_MVAR_VAR (HB_OT_METRICS_TAG_SUPERSCRIPT_EM_Y_OFFSET, ySuperscriptYOffset);
+ HB_ADD_MVAR_VAR (HB_OT_METRICS_TAG_STRIKEOUT_SIZE, yStrikeoutSize);
+ HB_ADD_MVAR_VAR (HB_OT_METRICS_TAG_STRIKEOUT_OFFSET, yStrikeoutPosition);
+
+ if (os2_prime->version >= 2)
+ {
+ auto *table = & const_cast<OS2V2Tail &> (os2_prime->v2 ());
+ HB_ADD_MVAR_VAR (HB_OT_METRICS_TAG_X_HEIGHT, sxHeight);
+ HB_ADD_MVAR_VAR (HB_OT_METRICS_TAG_CAP_HEIGHT, sCapHeight);
+ }
+ }
+#endif
+
+ Triple *axis_range;
+ if (c->plan->user_axes_location.has (HB_TAG ('w','g','h','t'), &axis_range))
+ {
+ unsigned weight_class = static_cast<unsigned> (roundf (hb_clamp (axis_range->middle, 1.0f, 1000.0f)));
+ if (os2_prime->usWeightClass != weight_class)
+ os2_prime->usWeightClass = weight_class;
+ }
+
+ if (c->plan->user_axes_location.has (HB_TAG ('w','d','t','h'), &axis_range))
+ {
+ unsigned width_class = static_cast<unsigned> (roundf (map_wdth_to_widthclass (axis_range->middle)));
+ if (os2_prime->usWidthClass != width_class)
+ os2_prime->usWidthClass = width_class;
+ }
+
if (c->plan->flags & HB_SUBSET_FLAGS_NO_PRUNE_UNICODE_RANGES)
return_trace (true);
- /* when --gids option is not used, no need to do collect_mapping that is
- * iterating all codepoints in each subtable, which is not efficient */
- uint16_t min_cp, max_cp;
- find_min_and_max_codepoint (c->plan->unicodes, &min_cp, &max_cp);
- os2_prime->usFirstCharIndex = min_cp;
- os2_prime->usLastCharIndex = max_cp;
+ os2_prime->usFirstCharIndex = hb_min (0xFFFFu, c->plan->unicodes.get_min ());
+ os2_prime->usLastCharIndex = hb_min (0xFFFFu, c->plan->unicodes.get_max ());
- _update_unicode_ranges (c->plan->unicodes, os2_prime->ulUnicodeRange);
+ _update_unicode_ranges (&c->plan->unicodes, os2_prime->ulUnicodeRange);
return_trace (true);
}
void _update_unicode_ranges (const hb_set_t *codepoints,
HBUINT32 ulUnicodeRange[4]) const
{
- HBUINT32 newBits[4];
+ HBUINT32 newBits[4];
for (unsigned int i = 0; i < 4; i++)
newBits[i] = 0;
- hb_codepoint_t cp = HB_SET_VALUE_INVALID;
- while (codepoints->next (&cp)) {
+ /* This block doesn't show up in profiles. If it ever did,
+ * we can rewrite it to iterate over OS/2 ranges and use
+ * set iteration to check if the range matches. */
+ for (auto cp : *codepoints)
+ {
unsigned int bit = _hb_ot_os2_get_unicode_range_bit (cp);
if (bit < 128)
{
ulUnicodeRange[i] = ulUnicodeRange[i] & newBits[i]; // set bits only if set in the original
}
- static void find_min_and_max_codepoint (const hb_set_t *codepoints,
- uint16_t *min_cp, /* OUT */
- uint16_t *max_cp /* OUT */)
- {
- *min_cp = hb_min (0xFFFFu, codepoints->get_min ());
- *max_cp = hb_min (0xFFFFu, codepoints->get_max ());
- }
-
- /* https://github.com/Microsoft/Font-Validator/blob/520aaae/OTFontFileVal/val_OS2.cs#L644-L681 */
+ /* https://github.com/Microsoft/Font-Validator/blob/520aaae/OTFontFileVal/val_OS2.cs#L644-L681
+ * https://docs.microsoft.com/en-us/typography/legacy/legacy_arabic_fonts */
enum font_page_t
{
+ FONT_PAGE_NONE = 0,
FONT_PAGE_HEBREW = 0xB100, /* Hebrew Windows 3.1 font page */
FONT_PAGE_SIMP_ARABIC = 0xB200, /* Simplified Arabic Windows 3.1 font page */
FONT_PAGE_TRAD_ARABIC = 0xB300, /* Traditional Arabic Windows 3.1 font page */
projects / platform / upstream / harfbuzz.git / blobdiff