Documented new constructor and overloaded Create methods.

[wxWidgets.git] / docs / latex / wx / strmzlib.tex

diff --git a/docs/latex/wx/strmzlib.tex b/docs/latex/wx/strmzlib.tex
index d905e630894fcb969834d3a9ee4e84c887e68b5c..d563a5064064f5587f369f57804089b683ba1429 100644 (file)
--- a/docs/latex/wx/strmzlib.tex
+++ b/docs/latex/wx/strmzlib.tex
@@ -3,8 +3,12 @@
 % -----------------------------------------------------------------------------
 \section{\class{wxZlibInputStream}}\label{wxzlibinputstream}
 
-This stream uncompresses all data read from it. It uses the "filtered"
-stream to get new compressed data.
+This filter stream decompresses a stream that is in zlib or gzip format.
+Note that reading the gzip format requires zlib version 1.2.0 greater.
+
+The stream is not seekable, \helpref{SeekI()}{wxinputstreamseeki} returns
+ {\it wxInvalidOffset}. Also \helpref{GetSize()}{wxstreambasegetsize} is
+not supported, it always returns $0$.
 
 \wxheading{Derived from}
 
@@ -16,15 +20,44 @@ stream to get new compressed data.
 
 \wxheading{See also}
 
-\helpref{wxStreamBuffer}{wxstreamBuffer}, \helpref{wxInputStream}{wxinputstream}
+\helpref{wxInputStream}{wxinputstream}, 
+ \helpref{wxZlibOutputStream}{wxzliboutputstream}.
+
+\latexignore{\rtfignore{\wxheading{Members}}}
+
+\membersection{wxZlibInputStream::wxZlibInputStream}
+
+\func{}{wxZlibInputStream}{\param{wxInputStream\&}{ stream}, \param{int}{ flags = wxZLIB\_ZLIB | wxZLIB\_GZIP}}
+
+The {\it flags} wxZLIB\_ZLIB and wxZLIB\_GZIP specify whether the input data
+is in zlib or gzip format. If both are used, bitwise ored, then zlib will
+autodetect the stream type, this is the default.
+If {\it flags} is zero, then the data is assumed to be a raw deflate stream
+without either zlib or gzip headers.
+
+The following symbols can be use for the flags:
+
+\begin{verbatim}
+// Flags
+enum {
+    wxZLIB_NO_HEADER = 0,   // raw deflate stream, no header or checksum
+    wxZLIB_ZLIB = 1,        // zlib header and checksum
+    wxZLIB_GZIP = 2         // gzip header and checksum, requires zlib 1.2+
+};
+\end{verbatim}
+
 
 % -----------------------------------------------------------------------------
 % wxZlibOutputStream
 % -----------------------------------------------------------------------------
 \section{\class{wxZlibOutputStream}}\label{wxzliboutputstream}
 
-This stream compresses all data written to it, and passes the compressed data
-to the ``filtered'' stream.
+This stream compresses all data written to it. The compressed output can be
+in zlib or gzip format.
+Note that writing the gzip format requires zlib version 1.2.0 greater.
+
+The stream is not seekable, \helpref{SeekO()}{wxoutputstreamseeko} returns
+ {\it wxInvalidOffset}.
 
 \wxheading{Derived from}
 
@@ -36,5 +69,42 @@ to the ``filtered'' stream.
 
 \wxheading{See also}
 
-\helpref{wxStreamBuffer}{wxstreamBuffer}, \helpref{wxOutputStream}{wxoutputstream}
+\helpref{wxOutputStream}{wxoutputstream},
+ \helpref{wxZlibInputStream}{wxzlibinputstream}
+
+
+\latexignore{\rtfignore{\wxheading{Members}}}
+
+\membersection{wxZlibOutputStream::wxZlibOutputStream}
+
+\func{}{wxZlibOutputStream}{\param{wxOutputStream\&}{ stream}, \param{int}{ level = -1}, \param{int}{ flags = wxZLIB\_ZLIB}}
+
+Creates a new write-only compressed stream. {\it level} means level of 
+compression. It is number between 0 and 9 (including these values) where
+0 means no compression and 9 best but slowest compression. -1 is default
+value (currently equivalent to 6).
+
+The {\it flags} wxZLIB\_ZLIB and wxZLIB\_GZIP specify whether the output data
+will be in zlib or gzip format. wxZLIB\_ZLIB is the default.
+If {\it flags} is zero, then a raw deflate stream is output without either
+zlib or gzip headers.
+
+The following symbols can be use for the compression level and flags:
+
+\begin{verbatim}
+// Compression level
+enum {
+    wxZ_DEFAULT_COMPRESSION = -1,
+    wxZ_NO_COMPRESSION = 0,
+    wxZ_BEST_SPEED = 1,
+    wxZ_BEST_COMPRESSION = 9
+};
+
+// Flags
+enum {
+    wxZLIB_NO_HEADER = 0,   // raw deflate stream, no header or checksum
+    wxZLIB_ZLIB = 1,        // zlib header and checksum
+    wxZLIB_GZIP = 2         // gzip header and checksum, requires zlib 1.2+
+};
+\end{verbatim}