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Create the groups for a cmap format12. Does not yet build the actual table.

This commit is contained in:
Rod Sheeter 2018-02-08 19:39:57 -08:00
parent 59c658c8d5
commit 1cd98d05e0
1 changed files with 25 additions and 0 deletions
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25
src/hb-ot-cmap-table.hh
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@ -193,6 +193,7 @@ struct CmapSubtableLongGroup
{ {
friend struct CmapSubtableFormat12; friend struct CmapSubtableFormat12;
friend struct CmapSubtableFormat13; friend struct CmapSubtableFormat13;
friend struct cmap;
int cmp (hb_codepoint_t codepoint) const int cmp (hb_codepoint_t codepoint) const
{ {
@ -506,6 +507,30 @@ struct cmap
inline bool subset (hb_subset_plan_t *plan, hb_face_t *source, hb_face_t *dest) const inline bool subset (hb_subset_plan_t *plan, hb_face_t *source, hb_face_t *dest) const
{ {
hb_auto_array_t<CmapSubtableLongGroup> groups;
CmapSubtableLongGroup *group = nullptr;
for (unsigned int i = 0; i < plan->codepoints.len; i++) {
hb_codepoint_t cp = plan->codepoints[i];
if (!group)
{
group = groups.push();
group->startCharCode.set(cp);
group->endCharCode.set(cp);
group->glyphID.set(i); // index in codepoints is new gid
} else if (cp -1 == group->endCharCode)
{
group->endCharCode.set(cp);
} else
{
group = nullptr;
}
}
DEBUG_MSG(SUBSET, nullptr, "cmap");
for (unsigned int i = 0; i < groups.len; i++) {
CmapSubtableLongGroup& group = groups[i];
DEBUG_MSG(SUBSET, nullptr, " %d: U+%04X-U+%04X, first gid %d", i, (uint32_t) group.startCharCode, (uint32_t) group.endCharCode, (uint32_t) group.glyphID);
}
return true; return true;
} }