本文整理汇总了C++中layer::maximum_extent方法的典型用法代码示例。如果您正苦于以下问题：C++ layer::maximum_extent方法的具体用法？C++ layer::maximum_extent怎么用？C++ layer::maximum_extent使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类layer的用法示例。
在下文中一共展示了layer::maximum_extent方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1:
void grid_renderer<T>::start_layer_processing(layer const& lay, box2d<double> const& query_extent)
{
MAPNIK_LOG_DEBUG(grid_renderer) << "grid_renderer: Start processing layer=" << lay.name();
MAPNIK_LOG_DEBUG(grid_renderer) << "grid_renderer: datasource=" << lay.datasource().get();
MAPNIK_LOG_DEBUG(grid_renderer) << "grid_renderer: query_extent = " << query_extent;
if (lay.clear_label_cache())
{
detector_->clear();
}
query_extent_ = query_extent;
int buffer_size = lay.buffer_size();
if (buffer_size != 0 )
{
double padding = buffer_size * (double)(query_extent.width()/pixmap_.width());
double x0 = query_extent_.minx();
double y0 = query_extent_.miny();
double x1 = query_extent_.maxx();
double y1 = query_extent_.maxy();
query_extent_.init(x0 - padding, y0 - padding, x1 + padding , y1 + padding);
}
boost::optional<box2d<double> > const& maximum_extent = lay.maximum_extent();
if (maximum_extent)
{
query_extent_.clip(*maximum_extent);
}
}示例2:
void grid_renderer<T>::start_layer_processing(layer const& lay, box2d<double> const& query_extent)
{
MAPNIK_LOG_DEBUG(grid_renderer) << "grid_renderer: Start processing layer=" << lay.name();
MAPNIK_LOG_DEBUG(grid_renderer) << "grid_renderer: datasource=" << lay.datasource().get();
MAPNIK_LOG_DEBUG(grid_renderer) << "grid_renderer: query_extent = " << query_extent;
if (lay.clear_label_cache())
{
detector_->clear();
}
query_extent_ = query_extent;
boost::optional<box2d<double> > const& maximum_extent = lay.maximum_extent();
if (maximum_extent)
{
query_extent_.clip(*maximum_extent);
}
}