miniz support in SkFlate / PDF

src/core/SkFlate.h

 
 /*
  * Copyright 2010 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.
  */
 
 
 #ifndef SkFlate_DEFINED
 #define SkFlate_DEFINED
 
 #include "SkTypes.h"
 
 #ifndef Sk_NO_FLATE
 
+#include "SkStream.h"
 class SkData;
-class SkWStream;
-class SkStream;
 
 /** \class SkFlate
     A class to provide access to the flate compression algorithm.
 */
 class SkFlate {
 public:
     /**
      *  Use the flate compression algorithm to compress the data in src,
      *  putting the result into dst.  Returns false if an error occurs.
      */
@@ skipping 10 matching lines @@
      *  putting the result into dst.  Returns false if an error occurs.
      */
     static bool Deflate(const SkData*, SkWStream* dst);
 
     /** Use the flate compression algorithm to decompress the data in src,
         putting the result into dst.  Returns false if an error occurs.
      */
     static bool Inflate(SkStream* src, SkWStream* dst);
 };
 
+/**
+  * Wrap a stream in this class to compress the information written to
+  * this stream using the Deflate algorithm.  Uses Zlib's
+  * Z_DEFAULT_COMPRESSION level.
+  *
+  * See http://en.wikipedia.org/wiki/DEFLATE
+  */
+class SkDeflateWStream : public SkWStream {
+public:
+    /** Does not take ownership of the stream. */
+    SkDeflateWStream(SkWStream*);
+
+    /** The destructor calls finalize(). */
+    ~SkDeflateWStream();
+
+    /** Write the end of the compressed stream.  All subsequent calls to
+        write() will fail. Subsequent calls to finalize() do nothing. */
+    void finalize();
+
+    // The SkWStream interface:
+    bool write(const void*, size_t) SK_OVERRIDE;
+    size_t bytesWritten() const SK_OVERRIDE;
+
+private:
+    struct Impl;
+    SkAutoTDelete<Impl> fImpl;
+};
+
 #endif  // SK_NO_FLATE
 #endif  // SkFlate_DEFINED