Realtime Compositor: Implement bilateral blur node

This patch implements the bilateral blur node for the realtime compositor.

Differential Revision: https://developer.blender.org/D15674

Reviewed By: Clement Foucault

1 files changed, 50 insertions, 1 deletions

diff --git a/source/blender/nodes/composite/nodes/node_composite_bilateralblur.cc b/source/blender/nodes/composite/nodes/node_composite_bilateralblur.cc
index 66a321eb088..355ec42f221 100644
--- a/source/blender/nodes/composite/nodes/node_composite_bilateralblur.cc
+++ b/source/blender/nodes/composite/nodes/node_composite_bilateralblur.cc
@@ -5,10 +5,15 @@
  * \ingroup cmpnodes
  */
 
+#include "BLI_math_base.hh"
+
 #include "UI_interface.h"
 #include "UI_resources.h"
 
+#include "GPU_shader.h"
+
 #include "COM_node_operation.hh"
+#include "COM_utilities.hh"
 
 #include "node_composite_util.hh"
 
@@ -52,7 +57,51 @@ class BilateralBlurOperation : public NodeOperation {
 
   void execute() override
   {
-    get_input("Image").pass_through(get_result("Image"));
+    const Result &input_image = get_input("Image");
+    /* Single value inputs can't be blurred and are returned as is. */
+    if (input_image.is_single_value()) {
+      get_input("Image").pass_through(get_result("Image"));
+      return;
+    }
+
+    GPUShader *shader = shader_manager().get("compositor_bilateral_blur");
+    GPU_shader_bind(shader);
+
+    GPU_shader_uniform_1i(shader, "radius", get_blur_radius());
+    GPU_shader_uniform_1f(shader, "threshold", get_threshold());
+
+    input_image.bind_as_texture(shader, "input_tx");
+
+    const Result &determinator_image = get_input("Determinator");
+    determinator_image.bind_as_texture(shader, "determinator_tx");
+
+    const Domain domain = compute_domain();
+    Result &output_image = get_result("Image");
+    output_image.allocate_texture(domain);
+    output_image.bind_as_image(shader, "output_img");
+
+    compute_dispatch_threads_at_least(shader, domain.size);
+
+    GPU_shader_unbind();
+    output_image.unbind_as_image();
+    input_image.unbind_as_texture();
+    determinator_image.unbind_as_texture();
+  }
+
+  int get_blur_radius()
+  {
+    return math::ceil(get_node_bilateral_blur_data().iter +
+                      get_node_bilateral_blur_data().sigma_space);
+  }
+
+  float get_threshold()
+  {
+    return get_node_bilateral_blur_data().sigma_color;
+  }
+
+  NodeBilateralBlurData &get_node_bilateral_blur_data()
+  {
+    return *static_cast<NodeBilateralBlurData *>(bnode().storage);
   }
 };