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added compression ratio argument to wxZlibOutputStream ctor

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@6427 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Václav Slavík
2000-03-03 22:52:17 +00:00
parent 77a36397c0
commit 5824f314a3
3 changed files with 17 additions and 3 deletions
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11
docs/latex/wx/strmzlib.tex
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@@ -38,3 +38,14 @@ to the "filtered" stream.
\helpref{wxOutputStream}{wxoutputstream}
\latexignore{\rtfignore{\wxheading{Members}}}
\membersection{wxZlibOutputStream::wxZlibOutputStream}
\func{}{wxZlibOutputStream}{\param{wxOutputStream\&}{ stream},\param{int}{ level = -1}}
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).

2
include/wx/zstream.h
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@@ -37,7 +37,7 @@ class WXDLLEXPORT wxZlibInputStream: public wxFilterInputStream {
class WXDLLEXPORT wxZlibOutputStream: public wxFilterOutputStream {
public:
wxZlibOutputStream(wxOutputStream& stream);
wxZlibOutputStream(wxOutputStream& stream, int level = -1);
virtual ~wxZlibOutputStream();
void Sync();

7
src/common/zstream.cpp
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@@ -104,7 +104,7 @@ size_t wxZlibInputStream::OnSysRead(void *buffer, size_t size)
// wxZlibOutputStream
//////////////////////
wxZlibOutputStream::wxZlibOutputStream(wxOutputStream& stream)
wxZlibOutputStream::wxZlibOutputStream(wxOutputStream& stream, int level)
: wxFilterOutputStream(stream)
{
int err;
@@ -115,7 +115,10 @@ wxZlibOutputStream::wxZlibOutputStream(wxOutputStream& stream)
m_deflate->zfree = (free_func)0;
m_deflate->opaque = (voidpf)0;
err = deflateInit(m_deflate, Z_DEFAULT_COMPRESSION);
if (level == -1) level = Z_DEFAULT_COMPRESSION;
wxASSERT_MSG(level >= 0 && level <= 9, wxT("wxZlibOutputStream compression level must be between 0 and 9!"));
err = deflateInit(m_deflate, level);
if (err != Z_OK) {
deflateEnd(m_deflate);
return;