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expose warp_image templated method

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This commit is contained in:
artemp 2014-12-17 14:24:58 +01:00
parent 6130b7f40d
commit 78fbc6df17
2 changed files with 25 additions and 6 deletions
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6
include/mapnik/warp.hpp
View File

@ -26,6 +26,7 @@
// mapnik
#include <mapnik/image_scaling.hpp>
#include <mapnik/config.hpp>
#include <mapnik/box2d.hpp>
namespace mapnik {
@ -39,6 +40,11 @@ MAPNIK_DECL void reproject_and_scale_raster(raster & target,
unsigned mesh_size,
scaling_method_e scaling_method);
template <typename T>
MAPNIK_DECL void warp_image (T & target, T const& source, proj_transform const& prj_trans,
box2d<double> const& target_ext, box2d<double> const& source_ext,
double offset_x, double offset_y, unsigned mesh_size, scaling_method_e scaling_method, double filter_factor);
}
#endif // MAPNIK_WARP_HPP

25
src/warp.cpp
View File

@ -48,10 +48,8 @@
namespace mapnik {
namespace detail {
template <typename T>
void warp_image (T & target, T const& source, proj_transform const& prj_trans,
MAPNIK_DECL void warp_image (T & target, T const& source, proj_transform const& prj_trans,
box2d<double> const& target_ext, box2d<double> const& source_ext,
double offset_x, double offset_y, unsigned mesh_size, scaling_method_e scaling_method, double filter_factor)
{
@ -148,7 +146,7 @@ void warp_image (T & target, T const& source, proj_transform const& prj_trans,
{
using span_gen_type = typename detail::agg_scaling_traits<image_data_type>::span_image_resample_affine;
agg::image_filter_lut filter;
set_scaling_method(filter, scaling_method, filter_factor);
detail::set_scaling_method(filter, scaling_method, filter_factor);
span_gen_type sg(ia, interpolator, filter);
agg::render_scanlines_bin(rasterizer, scanline, rb, sa, sg);
}
@ -158,6 +156,8 @@ void warp_image (T & target, T const& source, proj_transform const& prj_trans,
}
}
namespace detail {
struct warp_image_visitor : util::static_visitor<void>
{
warp_image_visitor (raster & target_raster, proj_transform const& prj_trans, box2d<double> const& source_ext,
@ -182,8 +182,8 @@ struct warp_image_visitor : util::static_visitor<void>
if (target_raster_.data_.template is<image_data_type>())
{
image_data_type & target = util::get<image_data_type>(target_raster_.data_);
detail::warp_image (target, source, prj_trans_, target_raster_.ext_, source_ext_,
offset_x_, offset_y_, mesh_size_, scaling_method_, filter_factor_);
warp_image (target, source, prj_trans_, target_raster_.ext_, source_ext_,
offset_x_, offset_y_, mesh_size_, scaling_method_, filter_factor_);
}
}
@ -210,4 +210,17 @@ void reproject_and_scale_raster(raster & target, raster const& source,
util::apply_visitor(warper, source.data_);
}
template MAPNIK_DECL void warp_image (image_data_rgba8&, image_data_rgba8 const&, proj_transform const&,
box2d<double> const&, box2d<double> const&, double, double, unsigned, scaling_method_e, double);
template MAPNIK_DECL void warp_image (image_data_gray8&, image_data_gray8 const&, proj_transform const&,
box2d<double> const&, box2d<double> const&, double, double, unsigned, scaling_method_e, double);
template MAPNIK_DECL void warp_image (image_data_gray16&, image_data_gray16 const&, proj_transform const&,
box2d<double> const&, box2d<double> const&, double, double, unsigned, scaling_method_e, double);
template MAPNIK_DECL void warp_image (image_data_gray32f&, image_data_gray32f const&, proj_transform const&,
box2d<double> const&, box2d<double> const&, double, double, unsigned, scaling_method_e, double);
}// namespace mapnik