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woff2: update to tip (i.e. rev 4721483a)

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This commit is contained in:
roytam1 2023-11-05 23:45:35 +08:00
commit f32ba72bba
13 changed files with 106 additions and 60 deletions
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20
modules/woff2/src/transform.cc
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@ -22,6 +22,7 @@ namespace {
const int FLAG_ARG_1_AND_2_ARE_WORDS = 1 << 0;
const int FLAG_WE_HAVE_INSTRUCTIONS = 1 << 8;
const int FLAG_OVERLAP_SIMPLE_BITMAP = 1 << 0;
void WriteBytes(std::vector<uint8_t>* out, const uint8_t* data, size_t len) {
if (len == 0) return;
@ -69,7 +70,10 @@ class GlyfEncoder {
}
void GetTransformedGlyfBytes(std::vector<uint8_t>* result) {
WriteLong(result, 0); // version
WriteUShort(result, 0); // Version
WriteUShort(result, overlap_bitmap_.empty()
? 0x00
: FLAG_OVERLAP_SIMPLE_BITMAP); // Flags
WriteUShort(result, n_glyphs_);
WriteUShort(result, 0); // index_format, will be set later
WriteLong(result, n_contour_stream_.size());
@ -87,6 +91,9 @@ class GlyfEncoder {
WriteBytes(result, bbox_bitmap_);
WriteBytes(result, bbox_stream_);
WriteBytes(result, instruction_stream_);
if (!overlap_bitmap_.empty()) {
WriteBytes(result, overlap_bitmap_);
}
}
private:
@ -127,6 +134,10 @@ class GlyfEncoder {
}
void WriteSimpleGlyph(int glyph_id, const Glyph& glyph) {
if (glyph.overlap_simple_flag_set) {
EnsureOverlapBitmap();
overlap_bitmap_[glyph_id >> 3] |= 0x80 >> (glyph_id & 7);
}
int num_contours = glyph.contours.size();
WriteUShort(&n_contour_stream_, num_contours);
if (ShouldWriteSimpleGlyphBbox(glyph)) {
@ -214,6 +225,12 @@ class GlyfEncoder {
}
}
void EnsureOverlapBitmap() {
if (overlap_bitmap_.empty()) {
overlap_bitmap_.resize((n_glyphs_ + 7) >> 3);
}
}
std::vector<uint8_t> n_contour_stream_;
std::vector<uint8_t> n_points_stream_;
std::vector<uint8_t> flag_byte_stream_;
@ -222,6 +239,7 @@ class GlyfEncoder {
std::vector<uint8_t> bbox_stream_;
std::vector<uint8_t> glyph_stream_;
std::vector<uint8_t> instruction_stream_;
std::vector<uint8_t> overlap_bitmap_;
int n_glyphs_;
};