Rasterizer skeleton

xs/CMakeLists.txt

@@ -167,6 +167,7 @@ add_library(libslic3r STATIC
     ${LIBDIR}/libslic3r/TriangleMesh.hpp
 #    ${LIBDIR}/libslic3r/utils.cpp
     ${LIBDIR}/libslic3r/Utils.hpp
+
 )
 
 add_library(libslic3r_gui STATIC
@@ -331,6 +332,19 @@ add_library(semver STATIC
     ${LIBDIR}/semver/semver.c
 )
 
+
+find_package(PNG REQUIRED)
+
+add_library(rasterizer STATIC
+    ${LIBDIR}/libslic3r/Rasterizer/Rasterizer.hpp
+    ${LIBDIR}/libslic3r/Rasterizer/Rasterizer.cpp
+)
+
+target_link_libraries(rasterizer ${PNG_LIBRARIES})
+target_include_directories(rasterizer PRIVATE ${PNG_INCLUDE_DIRS})
+target_compile_definitions(rasterizer PRIVATE ${PNG_DEFINITIONS})
+target_link_libraries(libslic3r rasterizer)
+
 # Generate the Slic3r Perl module (XS) typemap file.
 set(MyTypemap ${CMAKE_CURRENT_BINARY_DIR}/typemap)
 add_custom_command(

xs/src/libslic3r/Print.cpp

@@ -14,8 +14,11 @@
 // For png export of the sliced model
 #include <wx/dcmemory.h>
 #include <wx/bitmap.h>
+#include <wx/image.h>
 #include <wx/graphics.h>
 
+#include <omp.h>
+
 namespace Slic3r {
 
 template class PrintState<PrintStep, psCount>;
@@ -1251,30 +1254,54 @@ template<Print::FilePrinterFormat format>
 class FilePrinter {
 public:
     void drawPolygon(const ExPolygon& p);
+    void finish();
     void save(const std::string& path);
 };
 
 template<>
 class FilePrinter<Print::FilePrinterFormat::PNG> {
     wxBitmap bitmap_;
-    wxMemoryDC dc_;
+    std::unique_ptr<wxMemoryDC> dc_;
     std::unique_ptr<wxGraphicsContext> gc_;
+    double pxw_;
+    double pxh_;
 public:
-    inline FilePrinter(unsigned width, unsigned height):
-        bitmap_(width, height),
-        dc_(bitmap_),
-        gc_(wxGraphicsContext::Create(dc_)) {
+    inline FilePrinter(unsigned width_px, unsigned height_px,
+                       double width_mm, double height_mm):
+        bitmap_(width_px, height_px),
+        dc_(new wxMemoryDC(bitmap_)),
+        gc_(wxGraphicsContext::Create(*dc_)),
+        pxw_(width_mm/width_px),
+        pxh_(height_mm/width_px)
+    {
         gc_->SetAntialiasMode(wxANTIALIAS_DEFAULT);
     }
 
-    void drawPolygon(const ExPolygon& p) {
-        gc_->SetPen( *wxRED_PEN );
+    FilePrinter(const FilePrinter& ) = delete;
+    FilePrinter(FilePrinter&& m):
+        bitmap_(std::move(m.bitmap_)), dc_(std::move(m.dc_)),
+        gc_(std::move(m.gc_)), pxw_(m.pxw_), pxh_(m.pxh_) {}
+
+    void drawPolygon(const Polygon& p) {
+
+        gc_->SetPen(*wxWHITE_PEN);
         std::vector<wxPoint2DDouble> points;
-        points.reserve(p.contour.points.size());
-        for(auto pp : p.contour.points) points.emplace_back(pp.x, pp.y);
+        points.reserve(p.points.size());
+
+        for(auto pp : p.points) {
+            points.emplace_back(
+                    std::round(pp.x * SCALING_FACTOR/pxw_),
+                    std::round(pp.y * SCALING_FACTOR/pxh_)
+                        );
+        }
+
         gc_->DrawLines(points.size(), points.data());
     }
 
+    void finish() {
+
+    }
+
     void save(const std::string& path) {
         if(!bitmap_.SaveFile(path, wxBITMAP_TYPE_PNG)) {
             std::cout << "fail for " << path << std::endl;
@@ -1294,8 +1321,6 @@ void Print::print_to(std::string dirpath, Args...args)
     if(dir.back() != '/') dir.push_back('/');
 #endif
 
-    FilePrinter<format> printer(std::forward<Args>(args)...);
-
     LayerPtrs layers;
 
     std::for_each(objects.begin(), objects.end(), [&layers](PrintObject *o){
@@ -1308,17 +1333,17 @@ void Print::print_to(std::string dirpath, Args...args)
         return l1->print_z < l2->print_z;
     });
 
-//    auto printSlice = [&printer](ExPolygon path) {
-
-//    };
-
-    int layer_id = -1;
     ExPolygons previous_layer_slices;
     auto print_bb = bounding_box();
 
-    for(auto lp : layers) {
-        Layer& l = *lp;
-        ++layer_id;
+    std::vector<FilePrinter<format>> printers;
+    printers.reserve(layers.size());
+    for(unsigned i = 0; i < layers.size(); i++)
+        printers.emplace_back(std::forward<Args>(args)...);
+
+#pragma omp parallel for
+    for(int layer_id = 0; layer_id < layers.size(); layer_id++) {
+        Layer& l = *(layers[layer_id]);
 
         auto slices = l.slices;
         using Sl = ExPolygons::value_type;
@@ -1330,7 +1355,8 @@ void Print::print_to(std::string dirpath, Args...args)
 
         ExPolygons current_layer_slices;
 
-        // please enable C++14 ...
+        auto& printer = printers[layer_id];
+
         std::for_each(l.object()->_shifted_copies.begin(),
                       l.object()->_shifted_copies.end(),
                       [&] (Point d)
@@ -1341,14 +1367,18 @@ void Print::print_to(std::string dirpath, Args...args)
             {
                 slice.translate(d.x, d.y);
                 slice.translate(-print_bb.min.x, -print_bb.min.y);
-                printer.drawPolygon(slice);
-                // $print_polygon->($expolygon->contour, 'contour');
-                // $print_polygon->($_, 'hole') for @{$expolygon->holes};
+
+                printer.drawPolygon(slice.contour);
+                std::for_each(slice.holes.begin(), slice.holes.end(),
+                              [&printer](const Polygon& hole){
+                    printer.drawPolygon(hole);
+                });
+
                 current_layer_slices.push_back(slice);
             });
         });
 
-        printer.save(dir + "layer" + std::to_string(layer_id) + ".png");
+        printer.finish();
 
                                                                                 //        layer_id++;
                                                                                 //        if ($layer->slice_z == -1) {
@@ -1398,10 +1428,14 @@ void Print::print_to(std::string dirpath, Args...args)
 //        @previous_layer_slices = @current_layer_slices;
         previous_layer_slices = current_layer_slices;
     }
+
+//    for(unsigned i = 0; i < printers.size(); i++)
+//        printers[i].save(dir + "layer" + std::to_string(i) + ".png");
 }
 
-void Print::print_to_png(std::string dirpath) {
-    print_to<FilePrinterFormat::PNG>(dirpath, 800, 600);
+void Print::print_to_png(std::string dirpath, long width_px, long height_px,
+                         Pointf pixel_size_mm) {
+    print_to<FilePrinterFormat::PNG>(dirpath, 2560, 1440, 700, 400);
 }
 
 }

xs/src/libslic3r/Print.hpp

@@ -315,13 +315,17 @@ public:
         SVG
     };
 
-    void print_to_png(std::string dirpath);
-
-private:
-
     template<FilePrinterFormat format, class...Args>
     void print_to(std::string dirpath, Args...args);
 
+    void print_to_png(std::string dirpath, long width_px, long height_px,
+                      Pointf pixel_size_mm);
+
+    void print_to_png(std::string dirpath) {
+        // Where should this be specified?
+        print_to_png(dirpath, 2560, 1440, Pointf{2560/700.0, 2560/400.0});
+    }
+
 private:
     bool invalidate_state_by_config_options(const std::vector<t_config_option_key> &opt_keys);
     PrintRegionConfig _region_config_from_model_volume(const ModelVolume &volume);

xs/src/libslic3r/Rasterizer/Rasterizer.cpp

@@ -0,0 +1,40 @@
+#include "Rasterizer.hpp"
+
+#include <png.h>
+
+
+namespace Slic3r {
+
+class Raster::Impl {
+
+};
+
+Raster::Raster(const Raster::Resolution &r, const Raster::PixelDim &pd):
+    impl_(new Impl), resolution_(r), pxdim_(pd) {}
+
+Raster::~Raster() {}
+
+Raster::Raster(const Raster &cpy): resolution_(cpy.resolution_),
+    pxdim_(cpy.pxdim_) {
+    *impl_ = *(cpy.impl_);
+}
+
+Raster::Raster(Raster &&m):
+    impl_(std::move(m.impl_)), resolution_(m.resolution_), pxdim_(m.pxdim_) {}
+
+void Raster::clear()
+{
+
+}
+
+void Raster::draw(const Polygon &poly)
+{
+    png_image ifo;
+}
+
+void Raster::finish()
+{
+
+}
+
+}

xs/src/libslic3r/Rasterizer/Rasterizer.hpp

@@ -0,0 +1,43 @@
+#ifndef RASTERIZER_HPP
+#define RASTERIZER_HPP
+
+#include <Polygon.hpp>
+
+namespace Slic3r {
+
+class Raster {
+    class Impl;
+    std::unique_ptr<Impl> impl_;
+public:
+
+    struct Resolution {
+        unsigned width_px;
+        unsigned height_px;
+        inline Resolution(unsigned w, unsigned h): width_px(w), height_px(h) {}
+    };
+
+    struct PixelDim {
+        double w_mm;
+        double h_mm;
+        inline PixelDim(double px_width_mm, double px_height_mm ):
+            w_mm(px_width_mm), h_mm(px_height_mm) {}
+    };
+
+    inline explicit Raster(const Resolution& r, const PixelDim& pd );
+    ~Raster();
+    Raster(const Raster& cpy);
+    Raster(Raster&& m);
+
+    void clear();
+
+    void draw(const Polygon& poly);
+
+    void finish();
+
+private:
+    Resolution resolution_;
+    PixelDim pxdim_;
+};
+
+}
+#endif // RASTERIZER_HPP