sij/mapnik
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

+ ensure warp polygons are aligned exactly (avoid padding!) - #1501

Browse source
This commit is contained in:
artemp 2012-09-26 14:27:42 +01:00
parent a63df933d5
commit d91cd510aa
1 changed files with 9 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

18
src/warp.cpp
View file

@ -47,11 +47,11 @@
namespace mapnik {
void reproject_and_scale_raster(raster & target, raster const& source,
proj_transform const& prj_trans,
double offset_x, double offset_y,
unsigned mesh_size,
double filter_radius,
scaling_method_e scaling_method)
proj_transform const& prj_trans,
double offset_x, double offset_y,
unsigned mesh_size,
double filter_radius,
scaling_method_e scaling_method)
{
CoordTransform ts(source.data_.width(), source.data_.height(),
source.ext_);
@ -160,10 +160,10 @@ void reproject_and_scale_raster(raster & target, raster const& source,
tt.forward(polygon+6, polygon+7);
rasterizer.reset();
rasterizer.move_to_d(polygon[0]-1, polygon[1]-1);
rasterizer.line_to_d(polygon[2]+1, polygon[3]-1);
rasterizer.line_to_d(polygon[4]+1, polygon[5]+1);
rasterizer.line_to_d(polygon[6]-1, polygon[7]+1);
rasterizer.move_to_d(std::floor(polygon[0]), std::floor(polygon[1]));
rasterizer.line_to_d(std::floor(polygon[2]), std::floor(polygon[3]));
rasterizer.line_to_d(std::floor(polygon[4]), std::floor(polygon[5]));
rasterizer.line_to_d(std::floor(polygon[6]), std::floor(polygon[7]));
unsigned x0 = i * mesh_size;
unsigned y0 = j * mesh_size;