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[subset] Create new face and copy all tables to it 

test-subset fails now because subset-face does not know how to compile itself.
This commit is contained in:
Behdad Esfahbod 2018-02-07 16:44:52 -06:00
parent 4e1abe2ce0
commit 7fd0b61dee
1 changed files with 26 additions and 11 deletions
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37
src/hb-subset.cc
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@ -194,10 +194,9 @@ hb_subset_face_add_table (hb_face_t *face, hb_tag_t tag, hb_blob_t *blob)
/**
* hb_subset:
* @source: font face data to be subset.
* @profile: profile to use for the subsetting.
* @input: input to use for the subsetting.
* @face: font face data to be subset.
* @result: subsetting result.
*
* Subsets a font according to provided profile and input.
**/
@ -210,13 +209,32 @@ hb_subset (hb_face_t *source,
hb_subset_plan_t *plan = hb_subset_plan_create (source, profile, input);
hb_face_t *face = hb_subset_face_create ();
/* Copy tables to new face. */
{
hb_tag_t table_tags[32];
unsigned int offset = 0, count;
do {
count == ARRAY_LENGTH (table_tags);
hb_face_get_table_tags (source, offset, &count, table_tags);
for (unsigned int i = 0; i < count; i++)
{
hb_tag_t tag = table_tags[i];
hb_blob_t *blob = hb_face_reference_table (source, tag);
hb_subset_face_add_table (face, tag, blob);
hb_blob_destroy (blob);
}
} while (count == ARRAY_LENGTH (table_tags));
}
hb_codepoint_t old_gid = -1;
while (hb_set_next(plan->glyphs_to_retain, &old_gid)) {
while (hb_set_next (plan->glyphs_to_retain, &old_gid)) {
hb_codepoint_t new_gid;
if (hb_subset_plan_new_gid_for_old_id(plan, old_gid, &new_gid)) {
DEBUG_MSG(SUBSET, nullptr, "Remap %d : %d", old_gid, new_gid);
if (hb_subset_plan_new_gid_for_old_id (plan, old_gid, &new_gid)) {
DEBUG_MSG (SUBSET, nullptr, "Remap %d : %d", old_gid, new_gid);
} else {
DEBUG_MSG(SUBSET, nullptr, "Remap %d : DOOM! No new ID", old_gid);
DEBUG_MSG (SUBSET, nullptr, "Remap %d : DOOM! No new ID", old_gid);
}
}
// TODO:
@ -226,16 +244,13 @@ hb_subset (hb_face_t *source,
// - copy the table into the output.
// - Fix header + table directory.
bool success = true;
hb_blob_t *glyf_prime = nullptr;
if (hb_subset_glyf (plan, source, &glyf_prime)) {
// TODO: write new glyf to new face.
} else {
success = false;
}
hb_blob_destroy (glyf_prime);
hb_subset_plan_destroy (plan);
return success ? hb_face_reference (source) : nullptr;
return face;
}