Applied patch [ 1042241 ] Fixes print setup problem (MSW UNICODE build)

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

diff --git a/docs/latex/wx/strmzlib.tex b/docs/latex/wx/strmzlib.tex
index d563a5064064f5587f369f57804089b683ba1429..e7bd7b6d47b4015c663a89e4349452f69ac23c95 100644 (file)
--- a/docs/latex/wx/strmzlib.tex
+++ b/docs/latex/wx/strmzlib.tex
@@ -4,7 +4,8 @@
 \section{\class{wxZlibInputStream}}\label{wxzlibinputstream}
 
 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.
+Note that reading the gzip format requires zlib version 1.2.1 or greater,
+(the builtin version does support gzips).
 
 The stream is not seekable, \helpref{SeekI()}{wxinputstreamseeki} returns
  {\it wxInvalidOffset}. Also \helpref{GetSize()}{wxstreambasegetsize} is
@@ -25,27 +26,47 @@ not supported, it always returns $0$.
 
 \latexignore{\rtfignore{\wxheading{Members}}}
 
-\membersection{wxZlibInputStream::wxZlibInputStream}
+\membersection{wxZlibInputStream::wxZlibInputStream}\label{wxzlibinputstreamwxzlibinputstream}
 
-\func{}{wxZlibInputStream}{\param{wxInputStream\&}{ stream}, \param{int}{ flags = wxZLIB\_ZLIB | wxZLIB\_GZIP}}
+\func{}{wxZlibInputStream}{\param{wxInputStream\&}{ stream}, \param{int}{ flags = wxZLIB\_AUTO}}
 
 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
+is in zlib or gzip format. If wxZLIB\_AUTO is used, 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.
+
+If {\it flags} is wxZLIB\_NO\_HEADER, then the data is assumed to be a raw
+deflate stream without either zlib or gzip headers. This is a lower level
+mode, which is not usually used directly. It can be used to read a raw
+deflate stream embedded in a higher level protocol.
+
+%if WXWIN_COMPATIBILITY_2_4
+This version is not by default compatible with the output produced by
+the version of {\it wxZlibOutputStream} in wxWidgets 2.4.x. However,
+there is a compatibilty mode, which is switched on by passing
+wxZLIB\_24COMPATIBLE for flags. Note that in when operating in compatibilty
+mode error checking is very much reduced.
+%endif
 
 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+
+#if WXWIN_COMPATIBILITY_2_4
+    wxZLIB_24COMPATIBLE = 4, // read v2.4.x data without error
+#endif
+    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 1.2.1+
+    wxZLIB_AUTO = 3          // autodetect header zlib or gzip
 };
 \end{verbatim}
 
+\membersection{wxZlibInputStream::CanHandleGZip}\label{wxzlibinputstreamcanhandlegzip}
+
+\func{static bool}{CanHandleGZip}{\void}
+
+Returns true if zlib library in use can handle gzip compressed data.
 
 % -----------------------------------------------------------------------------
 % wxZlibOutputStream
@@ -54,7 +75,8 @@ enum {
 
 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.
+Note that writing the gzip format requires zlib version 1.2.1 or greater
+(the builtin version does support gzips).
 
 The stream is not seekable, \helpref{SeekO()}{wxoutputstreamseeko} returns
  {\it wxInvalidOffset}.
@@ -75,7 +97,7 @@ The stream is not seekable, \helpref{SeekO()}{wxoutputstreamseeko} returns
 
 \latexignore{\rtfignore{\wxheading{Members}}}
 
-\membersection{wxZlibOutputStream::wxZlibOutputStream}
+\membersection{wxZlibOutputStream::wxZlibOutputStream}\label{wxzliboutputstreamwxzliboutputstream}
 
 \func{}{wxZlibOutputStream}{\param{wxOutputStream\&}{ stream}, \param{int}{ level = -1}, \param{int}{ flags = wxZLIB\_ZLIB}}
 
@@ -86,8 +108,11 @@ 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.
+
+If {\it flags} is wxZLIB\_NO\_HEADER, then a raw deflate stream is output
+without either zlib or gzip headers. This is a lower level
+mode, which is not usually used directly. It can be used to embed a raw
+deflate stream in a higher level protocol.
 
 The following symbols can be use for the compression level and flags:
 
@@ -104,7 +129,13 @@ enum {
 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+
+    wxZLIB_GZIP = 2         // gzip header and checksum, requires zlib 1.2.1+
 };
 \end{verbatim}
 
+\membersection{wxZlibOutputStream::CanHandleGZip}\label{wxoutputstreamcanhandlegzip}
+
+\func{static bool}{CanHandleGZip}{\void}
+
+Returns true if zlib library in use can handle gzip compressed data.
+