Add m-esr52 at 52.6.0

2 files changed, 319 insertions, 0 deletions

diff --git a/gfx/ots/include/opentype-sanitiser.h b/gfx/ots/include/opentype-sanitiser.h
new file mode 100644
index 000000000..87d0f3d28
--- /dev/null
+++ b/gfx/ots/include/opentype-sanitiser.h
@@ -0,0 +1,214 @@
+// 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.
+
+#ifndef OPENTYPE_SANITISER_H_
+#define OPENTYPE_SANITISER_H_
+
+#if defined(_WIN32) || defined(__CYGWIN__)
+  #define OTS_DLL_IMPORT __declspec(dllimport)
+  #define OTS_DLL_EXPORT __declspec(dllexport)
+#else
+  #if __GNUC__ >= 4
+    #define OTS_DLL_IMPORT __attribute__((visibility ("default")))
+    #define OTS_DLL_EXPORT __attribute__((visibility ("default")))
+  #endif
+#endif
+
+#ifdef OTS_DLL
+  #ifdef OTS_DLL_EXPORTS
+    #define OTS_API OTS_DLL_EXPORT
+  #else
+    #define OTS_API OTS_DLL_IMPORT
+  #endif
+#else
+  #define OTS_API
+#endif
+
+#if defined(_WIN32)
+#include <stdlib.h>
+typedef signed char int8_t;
+typedef unsigned char uint8_t;
+typedef short int16_t;
+typedef unsigned short uint16_t;
+typedef int int32_t;
+typedef unsigned int uint32_t;
+typedef __int64 int64_t;
+typedef unsigned __int64 uint64_t;
+#define ntohl(x) _byteswap_ulong (x)
+#define ntohs(x) _byteswap_ushort (x)
+#define htonl(x) _byteswap_ulong (x)
+#define htons(x) _byteswap_ushort (x)
+#else
+#include <arpa/inet.h>
+#include <stdint.h>
+#endif
+
+#include <sys/types.h>
+
+#include <algorithm>
+#include <cassert>
+#include <cstddef>
+#include <cstring>
+
+#define OTS_TAG(c1,c2,c3,c4) ((uint32_t)((((uint8_t)(c1))<<24)|(((uint8_t)(c2))<<16)|(((uint8_t)(c3))<<8)|((uint8_t)(c4))))
+#define OTS_UNTAG(tag)       ((uint8_t)((tag)>>24)), ((uint8_t)((tag)>>16)), ((uint8_t)((tag)>>8)), ((uint8_t)(tag))
+
+namespace ots {
+
+// -----------------------------------------------------------------------------
+// This is an interface for an abstract stream class which is used for writing
+// the serialised results out.
+// -----------------------------------------------------------------------------
+class OTSStream {
+ public:
+  OTSStream() : chksum_(0) {}
+
+  virtual ~OTSStream() {}
+
+  // This should be implemented to perform the actual write.
+  virtual bool WriteRaw(const void *data, size_t length) = 0;
+
+  bool Write(const void *data, size_t length) {
+    if (!length) return false;
+
+    const size_t orig_length = length;
+    size_t offset = 0;
+
+    size_t chksum_offset = Tell() & 3;
+    if (chksum_offset) {
+      const size_t l = std::min(length, static_cast<size_t>(4) - chksum_offset);
+      uint32_t tmp = 0;
+      std::memcpy(reinterpret_cast<uint8_t *>(&tmp) + chksum_offset, data, l);
+      chksum_ += ntohl(tmp);
+      length -= l;
+      offset += l;
+    }
+
+    while (length >= 4) {
+      uint32_t tmp;
+      std::memcpy(&tmp, reinterpret_cast<const uint8_t *>(data) + offset,
+        sizeof(uint32_t));
+      chksum_ += ntohl(tmp);
+      length -= 4;
+      offset += 4;
+    }
+
+    if (length) {
+      if (length > 4) return false;  // not reached
+      uint32_t tmp = 0;
+      std::memcpy(&tmp,
+                  reinterpret_cast<const uint8_t*>(data) + offset, length);
+      chksum_ += ntohl(tmp);
+    }
+
+    return WriteRaw(data, orig_length);
+  }
+
+  virtual bool Seek(off_t position) = 0;
+  virtual off_t Tell() const = 0;
+
+  virtual bool Pad(size_t bytes) {
+    static const uint32_t kZero = 0;
+    while (bytes >= 4) {
+      if (!Write(&kZero, 4)) return false;
+      bytes -= 4;
+    }
+    while (bytes) {
+      static const uint8_t kZerob = 0;
+      if (!Write(&kZerob, 1)) return false;
+      bytes--;
+    }
+    return true;
+  }
+
+  bool WriteU8(uint8_t v) {
+    return Write(&v, sizeof(v));
+  }
+
+  bool WriteU16(uint16_t v) {
+    v = htons(v);
+    return Write(&v, sizeof(v));
+  }
+
+  bool WriteS16(int16_t v) {
+    v = htons(v);
+    return Write(&v, sizeof(v));
+  }
+
+  bool WriteU24(uint32_t v) {
+    v = htonl(v);
+    return Write(reinterpret_cast<uint8_t*>(&v)+1, 3);
+  }
+
+  bool WriteU32(uint32_t v) {
+    v = htonl(v);
+    return Write(&v, sizeof(v));
+  }
+
+  bool WriteS32(int32_t v) {
+    v = htonl(v);
+    return Write(&v, sizeof(v));
+  }
+
+  bool WriteR64(uint64_t v) {
+    return Write(&v, sizeof(v));
+  }
+
+  void ResetChecksum() {
+    assert((Tell() & 3) == 0);
+    chksum_ = 0;
+  }
+
+  uint32_t chksum() const {
+    return chksum_;
+  }
+
+ protected:
+  uint32_t chksum_;
+};
+
+#ifdef __GCC__
+#define MSGFUNC_FMT_ATTR __attribute__((format(printf, 2, 3)))
+#else
+#define MSGFUNC_FMT_ATTR
+#endif
+
+enum TableAction {
+  TABLE_ACTION_DEFAULT,  // Use OTS's default action for that table
+  TABLE_ACTION_SANITIZE, // Sanitize the table, potentially droping it
+  TABLE_ACTION_PASSTHRU, // Serialize the table unchanged
+  TABLE_ACTION_DROP      // Drop the table
+};
+
+class OTS_API OTSContext {
+  public:
+    OTSContext() {}
+    virtual ~OTSContext() {}
+
+    // Process a given OpenType file and write out a sanitised version
+    //   output: a pointer to an object implementing the OTSStream interface. The
+    //     sanitisied output will be written to this. In the even of a failure,
+    //     partial output may have been written.
+    //   input: the OpenType file
+    //   length: the size, in bytes, of |input|
+    //   index: if the input is a font collection and index is specified, then
+    //     the corresponding font will be returned, otherwise the whole
+    //     collection. Ignored for non-collection fonts.
+    bool Process(OTSStream *output, const uint8_t *input, size_t length, uint32_t index = -1);
+
+    // This function will be called when OTS is reporting an error.
+    //   level: the severity of the generated message:
+    //     0: error messages in case OTS fails to sanitize the font.
+    //     1: warning messages about issue OTS fixed in the sanitized font.
+    virtual void Message(int level, const char *format, ...) MSGFUNC_FMT_ATTR {}
+
+    // This function will be called when OTS needs to decide what to do for a
+    // font table.
+    //   tag: table tag formed with OTS_TAG() macro
+    virtual TableAction GetTableAction(uint32_t tag) { return ots::TABLE_ACTION_DEFAULT; }
+};
+
+}  // namespace ots
+
+#endif  // OPENTYPE_SANITISER_H_
diff --git a/gfx/ots/include/ots-memory-stream.h b/gfx/ots/include/ots-memory-stream.h
new file mode 100644
index 000000000..579da616f
--- /dev/null
+++ b/gfx/ots/include/ots-memory-stream.h
@@ -0,0 +1,105 @@
+// 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.
+
+#ifndef OTS_MEMORY_STREAM_H_
+#define OTS_MEMORY_STREAM_H_
+
+#include <cstring>
+#include <limits>
+
+#include "opentype-sanitiser.h"
+
+namespace ots {
+
+class MemoryStream : public OTSStream {
+ public:
+  MemoryStream(void *ptr, size_t length)
+      : ptr_(ptr), length_(length), off_(0) {
+  }
+
+  virtual bool WriteRaw(const void *data, size_t length) {
+    if ((off_ + length > length_) ||
+        (length > std::numeric_limits<size_t>::max() - off_)) {
+      return false;
+    }
+    std::memcpy(static_cast<char*>(ptr_) + off_, data, length);
+    off_ += length;
+    return true;
+  }
+
+  virtual bool Seek(off_t position) {
+    if (position < 0) return false;
+    if (static_cast<size_t>(position) > length_) return false;
+    off_ = position;
+    return true;
+  }
+
+  virtual off_t Tell() const {
+    return off_;
+  }
+
+ private:
+  void* const ptr_;
+  size_t length_;
+  off_t off_;
+};
+
+class ExpandingMemoryStream : public OTSStream {
+ public:
+  ExpandingMemoryStream(size_t initial, size_t limit)
+      : length_(initial), limit_(limit), off_(0) {
+    ptr_ = new uint8_t[length_];
+  }
+
+  ~ExpandingMemoryStream() {
+    delete[] static_cast<uint8_t*>(ptr_);
+  }
+
+  void* get() const {
+    return ptr_;
+  }
+
+  bool WriteRaw(const void *data, size_t length) {
+    if ((off_ + length > length_) ||
+        (length > std::numeric_limits<size_t>::max() - off_)) {
+      if (length_ == limit_)
+        return false;
+      size_t new_length = (length_ + 1) * 2;
+      if (new_length < length_)
+        return false;
+      if (new_length > limit_)
+        new_length = limit_;
+      uint8_t* new_buf = new uint8_t[new_length];
+      std::memcpy(new_buf, ptr_, length_);
+      length_ = new_length;
+      delete[] static_cast<uint8_t*>(ptr_);
+      ptr_ = new_buf;
+      return WriteRaw(data, length);
+    }
+    std::memcpy(static_cast<char*>(ptr_) + off_, data, length);
+    off_ += length;
+    return true;
+  }
+
+  bool Seek(off_t position) {
+    if (position < 0) return false;
+    if (static_cast<size_t>(position) > length_) return false;
+    off_ = position;
+    return true;
+  }
+
+  off_t Tell() const {
+    return off_;
+  }
+
+ private:
+  void* ptr_;
+  size_t length_;
+  const size_t limit_;
+  off_t off_;
+};
+
+}  // namespace ots
+
+#endif  // OTS_MEMORY_STREAM_H_