[PDF] Fix font embedding restrictions.

src/core/SkTypeface.cpp

 /*
  * Copyright 2011 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkAdvancedTypefaceMetrics.h"
+#include "SkEndian.h"
 #include "SkFontDescriptor.h"
 #include "SkFontHost.h"
+#include "SkOTTable_OS_2.h"
 #include "SkStream.h"
 #include "SkTypeface.h"
 
 //#define TRACE_LIFECYCLE
 
 #ifdef TRACE_LIFECYCLE
     static int32_t gTypefaceCounter;
 #endif
 
 SkTypeface::SkTypeface(Style style, SkFontID fontID, bool isFixedPitch)
@@ skipping 231 matching lines @@
     bool isLocal = false;
     SkFontDescriptor desc(this->style());
     this->onGetFontDescriptor(&desc, &isLocal);
     name->set(desc.getFamilyName());
 }
 
 SkAdvancedTypefaceMetrics* SkTypeface::getAdvancedTypefaceMetrics(
                                 SkAdvancedTypefaceMetrics::PerGlyphInfo info,
                                 const uint32_t* glyphIDs,
                                 uint32_t glyphIDsCount) const {
-    return this->onGetAdvancedTypefaceMetrics(info, glyphIDs, glyphIDsCount);
+    SkAdvancedTypefaceMetrics* result =
+            this->onGetAdvancedTypefaceMetrics(info, glyphIDs, glyphIDsCount);
+    if (result && result->fType == SkAdvancedTypefaceMetrics::kTrueType_Font) {
+        struct SkOTTableOS2 os2table;
+        if (this->getTableData(SkEndian_SwapBE32(SkOTTableOS2::TAG), 0,
+                               sizeof(os2table), &os2table) > 0) {
+            if (os2table.version.v4.fsType.field.Restricted ||
+                    os2table.version.v4.fsType.field.Bitmap) {
+                result->fFlags = SkTBitOr<SkAdvancedTypefaceMetrics::FontFlags>(
+                        result->fFlags,
+                        SkAdvancedTypefaceMetrics::kNotEmbeddable_Flag);
+            }
+            if (os2table.version.v4.fsType.field.NoSubsetting) {
+                result->fFlags = SkTBitOr<SkAdvancedTypefaceMetrics::FontFlags>(
+                        result->fFlags,
+                        SkAdvancedTypefaceMetrics::kNotSubsettable_Flag);
+            }
+        }
+    }
+    return result;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 bool SkTypeface::onGetKerningPairAdjustments(const uint16_t glyphs[], int count,
                                              int32_t adjustments[]) const {
     return false;
 }