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#include "hmtx.h"
#include "support/util.h"
static INLINE void disposeHmtx(MOVE table_hmtx *table) {
if (table->metrics != NULL) FREE(table->metrics);
if (table->leftSideBearing != NULL) FREE(table->leftSideBearing);
}
caryll_standardRefType(table_hmtx, table_iHmtx, disposeHmtx);
table_hmtx *otfcc_readHmtx(const otfcc_Packet packet, const otfcc_Options *options,
table_hhea *hhea, table_maxp *maxp) {
if (!hhea || !maxp || !hhea->numberOfMetrics || maxp->numGlyphs < hhea->numberOfMetrics) {
return NULL;
}
FOR_TABLE(OTFCC_CHR('h','m','t','x'), table) {
font_file_pointer data = table.data;
uint32_t length = table.length;
table_hmtx *hmtx = NULL;
glyphid_t count_a = hhea->numberOfMetrics;
glyphid_t count_k = maxp->numGlyphs - hhea->numberOfMetrics;
if (length < count_a * 4 + count_k * 2) goto HMTX_CORRUPTED;
NEW(hmtx);
NEW(hmtx->metrics, count_a);
NEW(hmtx->leftSideBearing, count_k);
for (glyphid_t ia = 0; ia < count_a; ia++) {
hmtx->metrics[ia].advanceWidth = read_16u(data + ia * 4);
hmtx->metrics[ia].lsb = read_16s(data + ia * 4 + 2);
}
for (glyphid_t ik = 0; ik < count_k; ik++) {
hmtx->leftSideBearing[ik] = read_16s(data + count_a * 4 + ik * 2);
}
return hmtx;
HMTX_CORRUPTED:
logWarning("Table 'hmtx' corrupted.\n");
if (hmtx) { table_iHmtx.free(hmtx), hmtx = NULL; }
}
return NULL;
}
caryll_Buffer *otfcc_buildHmtx(const table_hmtx *hmtx, glyphid_t count_a, glyphid_t count_k,
const otfcc_Options *options) {
caryll_Buffer *buf = bufnew();
if (!hmtx) return buf;
if (hmtx->metrics) {
for (glyphid_t j = 0; j < count_a; j++) {
bufwrite16b(buf, hmtx->metrics[j].advanceWidth);
bufwrite16b(buf, hmtx->metrics[j].lsb);
}
}
if (hmtx->leftSideBearing) {
for (glyphid_t j = 0; j < count_k; j++) {
bufwrite16b(buf, hmtx->leftSideBearing[j]);
}
}
return buf;
}
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