Add m-esr52 at 52.6.0

1 files changed, 95 insertions, 0 deletions

diff --git a/gfx/2d/SFNTData.h b/gfx/2d/SFNTData.h
new file mode 100644
index 000000000..e10d63cae
--- /dev/null
+++ b/gfx/2d/SFNTData.h
@@ -0,0 +1,95 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_gfx_SFNTData_h
+#define mozilla_gfx_SFNTData_h
+
+#include "mozilla/UniquePtr.h"
+#include "mozilla/Vector.h"
+#include "u16string.h"
+
+namespace mozilla {
+namespace gfx {
+
+class SFNTData final
+{
+public:
+
+  /**
+   * Creates an SFNTData if the header is a format that we understand and
+   * aDataLength is sufficient for the length information in the header data.
+   * Note that the data is NOT copied, so must exist the SFNTData's lifetime.
+   *
+   * @param aFontData the SFNT data.
+   * @param aDataLength length
+   * @return UniquePtr to a SFNTData or nullptr if the header is invalid.
+   */
+  static UniquePtr<SFNTData> Create(const uint8_t *aFontData,
+                                    uint32_t aDataLength);
+
+  /**
+   * Creates a unique key for the given font data.
+   *
+   * @param aFontData the SFNT data
+   * @param aDataLength length
+   * @return unique key to be used for caching
+   */
+  static uint64_t GetUniqueKey(const uint8_t *aFontData, uint32_t aDataLength);
+
+  ~SFNTData();
+
+  /**
+   * Gets the full name from the name table of the font corresponding to the
+   * index. If the full name string is not present it will use the family space
+   * concatenated with the style.
+   * This will only read names that are already UTF16.
+   *
+   * @param aFontData SFNT data.
+   * @param aDataLength length of aFontData.
+   * @param aU16FullName string to be populated with the full name.
+   * @return true if the full name is successfully read.
+   */
+  bool GetU16FullName(uint32_t aIndex, mozilla::u16string& aU16FullName);
+
+  /**
+   * Populate a Vector with the first UTF16 full name from each name table of
+   * the fonts. If the full name string is not present it will use the family
+   * space concatenated with the style.
+   * This will only read names that are already UTF16.
+   *
+   * @param aU16FullNames the Vector to be populated.
+   * @return true if at least one name found otherwise false.
+   */
+  bool GetU16FullNames(Vector<mozilla::u16string>& aU16FullNames);
+
+  /**
+   * Returns the index for the first UTF16 name matching aU16FullName.
+   *
+   * @param aU16FullName full name to find.
+   * @param aIndex out param for the index if found.
+   * @param aTruncatedLen length to truncate the compared font name to.
+   * @return true if the full name is successfully read.
+   */
+  bool GetIndexForU16Name(const mozilla::u16string& aU16FullName, uint32_t* aIndex,
+                          size_t aTruncatedLen = 0);
+
+private:
+
+  SFNTData() {}
+
+  bool AddFont(const uint8_t *aFontData, uint32_t aDataLength,
+               uint32_t aOffset);
+
+  // Internal representation of single font in font file.
+  class Font;
+
+  Vector<Font*> mFonts;
+};
+
+} // gfx
+} // mozilla
+
+#endif // mozilla_gfx_SFNTData_h