SkPDF: SkPDFFont organization changes.

SkPDFFont:
  - SkPDFType1Font::populate() encode advances correctly.
  - break out logically independent code into new files:
    * SkPDFConvertType1FontStream
    * SkPDFMakeToUnicodeCmap
    SkPDFFont.cpp is now 380 lines smaller.
    Expose `SkPDFAppendCmapSections()` for testing.

SkPDFFontImpl.h
  - Fold into SkPDFFont.

SkPDFConvertType1FontStream:
  - Now assume given a SkStreamAsset

SkPDFFont:
  - AdvanceMetric now hidden in a anonymous namespace.

No public API changes.
TBR=reed@google.com

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2221163002

Review-Url: https://codereview.chromium.org/2221163002

1 files changed, 29 insertions, 0 deletions

diff --git a/src/pdf/SkPDFMakeToUnicodeCmap.h b/src/pdf/SkPDFMakeToUnicodeCmap.h
new file mode 100644
index 0000000000..1bd8930742
--- /dev/null
+++ b/src/pdf/SkPDFMakeToUnicodeCmap.h
@@ -0,0 +1,29 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#ifndef SkPDFMakeToUnicodeCmap_DEFINED
+#define SkPDFMakeToUnicodeCmap_DEFINED
+
+#include "SkTDArray.h"
+#include "SkPDFFont.h"
+#include "SkStream.h"
+
+sk_sp<SkPDFStream> SkPDFMakeToUnicodeCmap(
+        const SkTDArray<SkUnichar>& glyphToUnicode,
+        const SkPDFGlyphSet* subset,
+        bool multiByteGlyphs,
+        SkGlyphID firstGlyphID,
+        SkGlyphID lastGlyphID);
+
+// Exposed for unit testing.
+void SkPDFAppendCmapSections(const SkTDArray<SkUnichar>& glyphToUnicode,
+                             const SkPDFGlyphSet* subset,
+                             SkDynamicMemoryWStream* cmap,
+                             bool multiByteGlyphs,
+                             SkGlyphID firstGlyphID,
+                             SkGlyphID lastGlyphID);
+
+#endif  // SkPDFMakeToUnicodeCmap_DEFINED