1 files changed, 49 insertions, 76 deletions

diff --git a/gfx/ots/src/hdmx.cc b/gfx/ots/src/hdmx.cc
index f57b71f59d..42ac9de8de 100644
--- a/gfx/ots/src/hdmx.cc
+++ b/gfx/ots/src/hdmx.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2009-2017 The OTS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -9,139 +9,112 @@
 // hdmx - Horizontal Device Metrics
 // http://www.microsoft.com/typography/otspec/hdmx.htm
 
-#define TABLE_NAME "hdmx"
-
-#define DROP_THIS_TABLE(...) \
-  do { \
-    OTS_FAILURE_MSG_(font->file, TABLE_NAME ": " __VA_ARGS__); \
-    OTS_FAILURE_MSG("Table discarded"); \
-    delete font->hdmx; \
-    font->hdmx = 0; \
-  } while (0)
-
 namespace ots {
 
-bool ots_hdmx_parse(Font *font, const uint8_t *data, size_t length) {
+bool OpenTypeHDMX::Parse(const uint8_t *data, size_t length) {
   Buffer table(data, length);
-  font->hdmx = new OpenTypeHDMX;
-  OpenTypeHDMX * const hdmx = font->hdmx;
 
-  if (!font->head || !font->maxp) {
-    return OTS_FAILURE_MSG("Missing maxp or head tables in font, needed by hdmx");
+  OpenTypeMAXP *maxp = static_cast<OpenTypeMAXP*>(
+      GetFont()->GetTypedTable(OTS_TAG_MAXP));
+  OpenTypeHEAD *head = static_cast<OpenTypeHEAD*>(
+      GetFont()->GetTypedTable(OTS_TAG_HEAD));
+  if (!head || !maxp) {
+    return Error("Missing maxp or head tables in font, needed by hdmx");
   }
 
-  if ((font->head->flags & 0x14) == 0) {
-    // http://www.microsoft.com/typography/otspec/recom.htm
-    DROP_THIS_TABLE("the table should not be present when bit 2 and 4 of the "
-                    "head->flags are not set");
-    return true;
+  if ((head->flags & 0x14) == 0) {
+    // http://www.microsoft.com/typography/otspec/recom.htm#hdmx
+    return Drop("the table should not be present when bit 2 and 4 of the "
+                "head->flags are not set");
   }
 
   int16_t num_recs;
-  if (!table.ReadU16(&hdmx->version) ||
+  if (!table.ReadU16(&this->version) ||
       !table.ReadS16(&num_recs) ||
-      !table.ReadS32(&hdmx->size_device_record)) {
-    return OTS_FAILURE_MSG("Failed to read hdmx header");
+      !table.ReadS32(&this->size_device_record)) {
+    return Error("Failed to read table header");
   }
-  if (hdmx->version != 0) {
-    DROP_THIS_TABLE("bad version: %u", hdmx->version);
-    return true;
+  if (this->version != 0) {
+    return Drop("Unsupported version: %u", this->version);
   }
   if (num_recs <= 0) {
-    DROP_THIS_TABLE("bad num_recs: %d", num_recs);
-    return true;
+    return Drop("Bad numRecords: %d", num_recs);
   }
-  const int32_t actual_size_device_record = font->maxp->num_glyphs + 2;
-  if (hdmx->size_device_record < actual_size_device_record) {
-    DROP_THIS_TABLE("bad hdmx->size_device_record: %d", hdmx->size_device_record);
-    return true;
+  const int32_t actual_size_device_record = maxp->num_glyphs + 2;
+  if (this->size_device_record < actual_size_device_record) {
+    return Drop("Bad sizeDeviceRecord: %d", this->size_device_record);
   }
 
-  hdmx->pad_len = hdmx->size_device_record - actual_size_device_record;
-  if (hdmx->pad_len > 3) {
-    return OTS_FAILURE_MSG("Bad padding %d", hdmx->pad_len);
+  this->pad_len = this->size_device_record - actual_size_device_record;
+  if (this->pad_len > 3) {
+    return Error("Bad DeviceRecord padding %d", this->pad_len);
   }
 
   uint8_t last_pixel_size = 0;
-  hdmx->records.reserve(num_recs);
+  this->records.reserve(num_recs);
   for (int i = 0; i < num_recs; ++i) {
     OpenTypeHDMXDeviceRecord rec;
 
     if (!table.ReadU8(&rec.pixel_size) ||
         !table.ReadU8(&rec.max_width)) {
-      return OTS_FAILURE_MSG("Failed to read hdmx record %d", i);
+      return Error("Failed to read DeviceRecord %d", i);
     }
     if ((i != 0) &&
         (rec.pixel_size <= last_pixel_size)) {
-      DROP_THIS_TABLE("records are not sorted");
-      return true;
+      return Drop("DeviceRecord's are not sorted");
     }
     last_pixel_size = rec.pixel_size;
 
-    rec.widths.reserve(font->maxp->num_glyphs);
-    for (unsigned j = 0; j < font->maxp->num_glyphs; ++j) {
+    rec.widths.reserve(maxp->num_glyphs);
+    for (unsigned j = 0; j < maxp->num_glyphs; ++j) {
       uint8_t width;
       if (!table.ReadU8(&width)) {
-        return OTS_FAILURE_MSG("Failed to read glyph width %d in record %d", j, i);
+        return Error("Failed to read glyph width %d in DeviceRecord %d", j, i);
       }
       rec.widths.push_back(width);
     }
 
-    if ((hdmx->pad_len > 0) &&
-        !table.Skip(hdmx->pad_len)) {
-      return OTS_FAILURE_MSG("Failed to skip padding %d", hdmx->pad_len);
+    if ((this->pad_len > 0) &&
+        !table.Skip(this->pad_len)) {
+      return Error("DeviceRecord %d should be padded by %d", i, this->pad_len);
     }
 
-    hdmx->records.push_back(rec);
+    this->records.push_back(rec);
   }
 
   return true;
 }
 
-bool ots_hdmx_should_serialise(Font *font) {
-  if (!font->hdmx) return false;
-  if (!font->glyf) return false;  // this table is not for CFF fonts.
-  return true;
+bool OpenTypeHDMX::ShouldSerialize() {
+  return Table::ShouldSerialize() &&
+         // this table is not for CFF fonts.
+         GetFont()->GetTable(OTS_TAG_GLYF) != NULL;
 }
 
-bool ots_hdmx_serialise(OTSStream *out, Font *font) {
-  OpenTypeHDMX * const hdmx = font->hdmx;
-
-  const int16_t num_recs = static_cast<int16_t>(hdmx->records.size());
-  if (hdmx->records.size() >
+bool OpenTypeHDMX::Serialize(OTSStream *out) {
+  const int16_t num_recs = static_cast<int16_t>(this->records.size());
+  if (this->records.size() >
           static_cast<size_t>(std::numeric_limits<int16_t>::max()) ||
-      !out->WriteU16(hdmx->version) ||
+      !out->WriteU16(this->version) ||
       !out->WriteS16(num_recs) ||
-      !out->WriteS32(hdmx->size_device_record)) {
-    return OTS_FAILURE_MSG("Failed to write hdmx header");
+      !out->WriteS32(this->size_device_record)) {
+    return Error("Failed to write table header");
   }
 
   for (int16_t i = 0; i < num_recs; ++i) {
-    const OpenTypeHDMXDeviceRecord& rec = hdmx->records[i];
+    const OpenTypeHDMXDeviceRecord& rec = this->records[i];
     if (!out->Write(&rec.pixel_size, 1) ||
         !out->Write(&rec.max_width, 1) ||
         !out->Write(&rec.widths[0], rec.widths.size())) {
-      return OTS_FAILURE_MSG("Failed to write hdmx record %d", i);
+      return Error("Failed to write DeviceRecord %d", i);
     }
-    if ((hdmx->pad_len > 0) &&
-        !out->Write((const uint8_t *)"\x00\x00\x00", hdmx->pad_len)) {
-      return OTS_FAILURE_MSG("Failed to write hdmx padding of length %d", hdmx->pad_len);
+    if ((this->pad_len > 0) &&
+        !out->Write((const uint8_t *)"\x00\x00\x00", this->pad_len)) {
+      return Error("Failed to write padding of length %d", this->pad_len);
     }
   }
 
   return true;
 }
 
-void ots_hdmx_reuse(Font *font, Font *other) {
-  font->hdmx = other->hdmx;
-  font->hdmx_reused = true;
-}
-
-void ots_hdmx_free(Font *font) {
-  delete font->hdmx;
-}
-
 }  // namespace ots
-
-#undef TABLE_NAME
-#undef DROP_THIS_TABLE