erge branch 'master' of http://git.nakadashi.lol/akko/diffvg

diffvg.cpp

@@ -1490,6 +1490,11 @@ void render(std::shared_ptr<Scene> scene,
             bool use_prefiltering,
             ptr<float> eval_positions,
             int num_eval_positions) {
+
+    /////////////////
+    // Setup stuff //
+    /////////////////
+
 #ifdef __NVCC__
     int old_device_id = -1;
     if (scene->use_gpu) {
@@ -1519,6 +1524,11 @@ void render(std::shared_ptr<Scene> scene,
         }
     }
 
+    ///////////////////////////////////////////////////////////////////
+    // IDK what this does but I think it relates to the prefiltering //
+    // TODO                                                          //
+    ///////////////////////////////////////////////////////////////////
+
     if (render_image.get() != nullptr || d_render_image.get() != nullptr ||
         render_sdf.get() != nullptr || d_render_sdf.get() != nullptr) {
         if (weight_image != nullptr) {
@@ -1533,6 +1543,11 @@ void render(std::shared_ptr<Scene> scene,
             }, width * height * num_samples_x * num_samples_y, scene->use_gpu);
         }
 
+
+        ////////////////////////////////////////////////
+        // Think this relates to the actual rendering //
+        ////////////////////////////////////////////////
+
         auto num_samples = eval_positions.get() == nullptr ?
             width * height * num_samples_x * num_samples_y : num_eval_positions;
         parallel_for(render_kernel{
@@ -1555,6 +1570,11 @@ void render(std::shared_ptr<Scene> scene,
         }, num_samples, scene->use_gpu);
     }
 
+    /////////////////////////////////////////////////////////////////////
+    // The reason for this is described in the diffvg paper            //
+    // I don't think it's especially important for the gradient meshes //
+    /////////////////////////////////////////////////////////////////////
+
     // Boundary sampling
     if (!use_prefiltering && d_render_image.get() != nullptr) {
         auto num_samples = width * height * num_samples_x * num_samples_y;