miniz support in SkFlate / PDF

src/core/SkFlate.h

Index: src/core/SkFlate.h
diff --git a/src/core/SkFlate.h b/src/core/SkFlate.h
index 69dac018de6e93733a980cfc098b77a7ca5e1c2d..e9c40ae9e0837f55b17513cddb794a7090feca6e 100644
--- a/src/core/SkFlate.h
+++ b/src/core/SkFlate.h
@@ -14,9 +14,8 @@
 
 #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.
@@ -47,5 +46,33 @@ public:
     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