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speed optimizations by more careful use (or avoidance) of locking around projection code

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This commit is contained in:
Dane Springmeyer 2010-07-21 23:05:22 +00:00
parent e4bfdfecf5
commit f802d21865
5 changed files with 30 additions and 23 deletions
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2
CHANGELOG
View file

@ -14,6 +14,8 @@ For a complete change history, see the SVN log.
Mapnik Trunk
------------
- Optimized rendering speeds by avoiding locking the projection code (r2063)
- Added support for setting global alignment of polygon pattern fills (#203)
- Added support for choosing OGR layer by index number using 'layer_by_index' parameter (r1904)

3
include/mapnik/proj_transform.hpp
View file

@ -38,6 +38,7 @@ public:
proj_transform(projection const& source,
projection const& dest);
bool equal() const;
bool forward (double& x, double& y , double& z) const;
bool backward (double& x, double& y , double& z) const;
mapnik::projection const& source() const;
@ -48,7 +49,7 @@ private:
projection const& dest_;
bool is_source_latlong_;
bool is_dest_latlong_;
bool is_source_equal_dest;
bool is_source_equal_dest_;
};
}

1
include/mapnik/projection.hpp
View file

@ -73,6 +73,7 @@ private:
private:
std::string params_;
void * proj_;
bool is_geographic_;
#ifdef MAPNIK_THREADSAFE
static boost::mutex mutex_;
#endif

32
src/proj_transform.cpp
View file

@ -35,20 +35,19 @@ proj_transform::proj_transform(projection const& source,
: source_(source),
dest_(dest)
{
#ifdef MAPNIK_THREADSAFE
mutex::scoped_lock lock(projection::mutex_);
#endif
is_source_latlong_ = pj_is_latlong(source_.proj_) ? true : false;
is_dest_latlong_ = pj_is_latlong(dest_.proj_) ? true : false ;
is_source_equal_dest = (source_ == dest_);
is_source_latlong_ = source_.is_geographic();
is_dest_latlong_ = dest_.is_geographic();
is_source_equal_dest_ = (source_ == dest_);
}
bool proj_transform::equal() const
{
return is_source_equal_dest_;
}
bool proj_transform::forward (double & x, double & y , double & z) const
{
#ifdef MAPNIK_THREADSAFE
mutex::scoped_lock lock(projection::mutex_);
#endif
if (is_source_equal_dest)
if (is_source_equal_dest_)
return true;
if (is_source_latlong_)
@ -57,6 +56,10 @@ bool proj_transform::forward (double & x, double & y , double & z) const
y *= DEG_TO_RAD;
}
#ifdef MAPNIK_THREADSAFE
mutex::scoped_lock lock(projection::mutex_);
#endif
if (pj_transform( source_.proj_, dest_.proj_, 1,
0, &x,&y,&z) != 0)
{
@ -74,10 +77,7 @@ bool proj_transform::forward (double & x, double & y , double & z) const
bool proj_transform::backward (double & x, double & y , double & z) const
{
#ifdef MAPNIK_THREADSAFE
mutex::scoped_lock lock(projection::mutex_);
#endif
if (is_source_equal_dest)
if (is_source_equal_dest_)
return true;
if (is_dest_latlong_)
@ -86,6 +86,10 @@ bool proj_transform::backward (double & x, double & y , double & z) const
y *= DEG_TO_RAD;
}
#ifdef MAPNIK_THREADSAFE
mutex::scoped_lock lock(projection::mutex_);
#endif
if (pj_transform( dest_.proj_, source_.proj_, 1,
0, &x,&y,&z) != 0)
{

13
src/projection.cpp
View file

@ -70,10 +70,7 @@ bool projection::is_initialized() const
bool projection::is_geographic() const
{
#ifdef MAPNIK_THREADSAFE
mutex::scoped_lock lock(mutex_);
#endif
return pj_is_latlong(proj_) ? true : false;
return is_geographic_;
}
std::string const& projection::params() const
@ -92,7 +89,7 @@ void projection::forward(double & x, double &y ) const
p = pj_fwd(p,proj_);
x = p.u;
y = p.v;
if (pj_is_latlong(proj_))
if (is_geographic_)
{
x *=RAD_TO_DEG;
y *=RAD_TO_DEG;
@ -104,7 +101,7 @@ void projection::inverse(double & x,double & y) const
#ifdef MAPNIK_THREADSAFE
mutex::scoped_lock lock(mutex_);
#endif
if (pj_is_latlong(proj_))
if (is_geographic_)
{
x *=DEG_TO_RAD;
y *=DEG_TO_RAD;
@ -127,11 +124,13 @@ projection::~projection()
void projection::init()
{
#ifdef MAPNIK_THREADSAFE
// http://trac.osgeo.org/proj/wiki/ThreadSafety
#if PJ_VERSION < 470 && MAPNIK_THREADSAFE
mutex::scoped_lock lock(mutex_);
#endif
proj_=pj_init_plus(params_.c_str());
if (!proj_) throw proj_init_error(params_);
is_geographic_ = pj_is_latlong(proj_) ? true : false;
}
void projection::swap (projection& rhs)