otl_subtable *caryll_read_gpos_mark_to_ligature(font_file_pointer data, uint32_t tableLength,
uint32_t offset) {
otl_subtable *_subtable;
NEW(_subtable);
subtable_gpos_mark_to_ligature *subtable = &(_subtable->gpos_mark_to_ligature);
if (tableLength < offset + 12) goto FAIL;
subtable->marks = caryll_read_coverage(data, tableLength, offset + read_16u(data + offset + 2));
subtable->bases = caryll_read_coverage(data, tableLength, offset + read_16u(data + offset + 4));
if (!subtable->marks || subtable->marks->numGlyphs == 0 || !subtable->bases ||
subtable->bases->numGlyphs == 0)
goto FAIL;
subtable->classCount = read_16u(data + offset + 6);
uint32_t markArrayOffset = offset + read_16u(data + offset + 8);
subtable->markArray = otl_read_mark_array(data, tableLength, markArrayOffset);
if (!subtable->markArray || subtable->markArray->markCount != subtable->marks->numGlyphs)
goto FAIL;
uint32_t ligArrayOffset = offset + read_16u(data + offset + 10);
checkLength(ligArrayOffset + 2 + 2 * subtable->bases->numGlyphs);
if (read_16u(data + ligArrayOffset) != subtable->bases->numGlyphs) goto FAIL;
NEW_N(subtable->ligArray, subtable->bases->numGlyphs);
for (uint16_t j = 0; j < subtable->bases->numGlyphs; j++) { subtable->ligArray[j] = NULL; }
for (uint16_t j = 0; j < subtable->bases->numGlyphs; j++) {
uint32_t ligAttachOffset = ligArrayOffset + read_16u(data + ligArrayOffset + 2 + j * 2);
NEW(subtable->ligArray[j]);
subtable->ligArray[j]->anchors = NULL;
checkLength(ligAttachOffset + 2);
subtable->ligArray[j]->componentCount = read_16u(data + ligAttachOffset);
checkLength(ligAttachOffset + 2 +
2 * subtable->ligArray[j]->componentCount * subtable->classCount);
NEW_N(subtable->ligArray[j]->anchors, subtable->ligArray[j]->componentCount);
uint32_t _offset = ligAttachOffset + 2;
for (uint16_t k = 0; k < subtable->ligArray[j]->componentCount; k++) {
NEW_N(subtable->ligArray[j]->anchors[k], subtable->classCount);
for (uint16_t m = 0; m < subtable->classCount; m++) {
uint32_t anchorOffset = read_16u(data + _offset);
if (anchorOffset) {
subtable->ligArray[j]->anchors[k][m] =
otl_read_anchor(data, tableLength, ligAttachOffset + anchorOffset);
} else {
subtable->ligArray[j]->anchors[k][m].present = false;
subtable->ligArray[j]->anchors[k][m].x = 0;
subtable->ligArray[j]->anchors[k][m].y = 0;
}
_offset += 2;
}
}
}
goto OK;
FAIL:
DELETE(delete_mtl_subtable, _subtable);
OK:
return _subtable;
}
otl_subtable *caryll_read_gsub_ligature(font_file_pointer data, uint32_t tableLength,
uint32_t offset) {
otl_subtable *_subtable;
NEW(_subtable);
subtable_gsub_ligature *subtable = &(_subtable->gsub_ligature);
subtable->from = NULL;
subtable->to = NULL;
checkLength(offset + 6);
otl_coverage *startCoverage =
caryll_read_coverage(data, tableLength, offset + read_16u(data + offset + 2));
if (!startCoverage) goto FAIL;
uint16_t setCount = read_16u(data + offset + 4);
if (setCount != startCoverage->numGlyphs) goto FAIL;
checkLength(offset + 6 + setCount * 2);
uint32_t ligatureCount = 0;
for (uint16_t j = 0; j < setCount; j++) {
uint32_t setOffset = offset + read_16u(data + offset + 6 + j * 2);
checkLength(setOffset + 2);
ligatureCount += read_16u(data + setOffset);
checkLength(setOffset + 2 + read_16u(data + setOffset) * 2);
}
NEW(subtable->to);
subtable->to->numGlyphs = ligatureCount;
NEW_N(subtable->to->glyphs, ligatureCount);
NEW_N(subtable->from, ligatureCount);
for (uint16_t j = 0; j < ligatureCount; j++) { subtable->from[j] = NULL; };
uint16_t jj = 0;
for (uint16_t j = 0; j < setCount; j++) {
uint32_t setOffset = offset + read_16u(data + offset + 6 + j * 2);
uint16_t lc = read_16u(data + setOffset);
for (uint16_t k = 0; k < lc; k++) {
uint32_t ligOffset = setOffset + read_16u(data + setOffset + 2 + k * 2);
checkLength(ligOffset + 4);
uint16_t ligComponents = read_16u(data + ligOffset + 2);
checkLength(ligOffset + 2 + ligComponents * 2);
subtable->to->glyphs[jj].gid = read_16u(data + ligOffset);
subtable->to->glyphs[jj].name = NULL;
NEW(subtable->from[jj]);
subtable->from[jj]->numGlyphs = ligComponents;
NEW_N(subtable->from[jj]->glyphs, ligComponents);
subtable->from[jj]->glyphs[0].gid = startCoverage->glyphs[j].gid;
subtable->from[jj]->glyphs[0].name = NULL;
for (uint16_t m = 1; m < ligComponents; m++) {
subtable->from[jj]->glyphs[m].gid = read_16u(data + ligOffset + 2 + m * 2);
subtable->from[jj]->glyphs[m].name = NULL;
}
jj++;
}
}
caryll_delete_coverage(startCoverage);
return _subtable;
FAIL:
deleteGSUBLigatureSubtable(_subtable);
return NULL;
}
