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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /gfx/ots/src/vorg.cc
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'gfx/ots/src/vorg.cc')
-rw-r--r--gfx/ots/src/vorg.cc111
1 files changed, 111 insertions, 0 deletions
diff --git a/gfx/ots/src/vorg.cc b/gfx/ots/src/vorg.cc
new file mode 100644
index 000000000..358923125
--- /dev/null
+++ b/gfx/ots/src/vorg.cc
@@ -0,0 +1,111 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "vorg.h"
+
+#include <vector>
+
+// VORG - Vertical Origin Table
+// http://www.microsoft.com/typography/otspec/vorg.htm
+
+#define TABLE_NAME "VORG"
+
+#define DROP_THIS_TABLE(...) \
+ do { \
+ OTS_FAILURE_MSG_(font->file, TABLE_NAME ": " __VA_ARGS__); \
+ OTS_FAILURE_MSG("Table discarded"); \
+ delete font->vorg; \
+ font->vorg = 0; \
+ } while (0)
+
+namespace ots {
+
+bool ots_vorg_parse(Font *font, const uint8_t *data, size_t length) {
+ Buffer table(data, length);
+ font->vorg = new OpenTypeVORG;
+ OpenTypeVORG * const vorg = font->vorg;
+
+ uint16_t num_recs;
+ if (!table.ReadU16(&vorg->major_version) ||
+ !table.ReadU16(&vorg->minor_version) ||
+ !table.ReadS16(&vorg->default_vert_origin_y) ||
+ !table.ReadU16(&num_recs)) {
+ return OTS_FAILURE_MSG("Failed to read header");
+ }
+ if (vorg->major_version != 1) {
+ DROP_THIS_TABLE("bad major version: %u", vorg->major_version);
+ return true;
+ }
+ if (vorg->minor_version != 0) {
+ DROP_THIS_TABLE("bad minor version: %u", vorg->minor_version);
+ return true;
+ }
+
+ // num_recs might be zero (e.g., DFHSMinchoPro5-W3-Demo.otf).
+ if (!num_recs) {
+ return true;
+ }
+
+ uint16_t last_glyph_index = 0;
+ vorg->metrics.reserve(num_recs);
+ for (unsigned i = 0; i < num_recs; ++i) {
+ OpenTypeVORGMetrics rec;
+
+ if (!table.ReadU16(&rec.glyph_index) ||
+ !table.ReadS16(&rec.vert_origin_y)) {
+ return OTS_FAILURE_MSG("Failed to read record %d", i);
+ }
+ if ((i != 0) && (rec.glyph_index <= last_glyph_index)) {
+ DROP_THIS_TABLE("the table is not sorted");
+ return true;
+ }
+ last_glyph_index = rec.glyph_index;
+
+ vorg->metrics.push_back(rec);
+ }
+
+ return true;
+}
+
+bool ots_vorg_should_serialise(Font *font) {
+ if (!font->cff) return false; // this table is not for fonts with TT glyphs.
+ return font->vorg != NULL;
+}
+
+bool ots_vorg_serialise(OTSStream *out, Font *font) {
+ OpenTypeVORG * const vorg = font->vorg;
+
+ const uint16_t num_metrics = static_cast<uint16_t>(vorg->metrics.size());
+ if (num_metrics != vorg->metrics.size() ||
+ !out->WriteU16(vorg->major_version) ||
+ !out->WriteU16(vorg->minor_version) ||
+ !out->WriteS16(vorg->default_vert_origin_y) ||
+ !out->WriteU16(num_metrics)) {
+ return OTS_FAILURE_MSG("Failed to write table header");
+ }
+
+ for (uint16_t i = 0; i < num_metrics; ++i) {
+ const OpenTypeVORGMetrics& rec = vorg->metrics[i];
+ if (!out->WriteU16(rec.glyph_index) ||
+ !out->WriteS16(rec.vert_origin_y)) {
+ return OTS_FAILURE_MSG("Failed to write record %d", i);
+ }
+ }
+
+ return true;
+}
+
+void ots_vorg_reuse(Font *font, Font *other) {
+ font->vorg = other->vorg;
+ font->vorg_reused = true;
+}
+
+void ots_vorg_free(Font *font) {
+ delete font->vorg;
+}
+
+} // namespace ots
+
+#undef TABLE_NAME
+#undef DROP_THIS_TABLE