From a4a72bffd33a6611de561292ff5a2e004a74867d Mon Sep 17 00:00:00 2001
From: Manuel Castilla <manzanillawork@gmail.com>
Date: Mon, 26 Jul 2021 19:36:22 +0200
Subject: Compositor: Full frame Box Mask node

Adds full frame implementation to this node operation.
No functional changes.

Reviewed By: jbakker

Differential Revision: https://developer.blender.org/D11627
---
 .../compositor/operations/COM_BoxMaskOperation.cc  | 58 ++++++++++++++++++++++
 .../compositor/operations/COM_BoxMaskOperation.h   | 16 +++++-
 2 files changed, 72 insertions(+), 2 deletions(-)

(limited to 'source/blender/compositor')

diff --git a/source/blender/compositor/operations/COM_BoxMaskOperation.cc b/source/blender/compositor/operations/COM_BoxMaskOperation.cc
index 9938d4a85ed..15bb19660dc 100644
--- a/source/blender/compositor/operations/COM_BoxMaskOperation.cc
+++ b/source/blender/compositor/operations/COM_BoxMaskOperation.cc
@@ -105,6 +105,64 @@ void BoxMaskOperation::executePixelSampled(float output[4], float x, float y, Pi
   }
 }
 
+void BoxMaskOperation::update_memory_buffer_partial(MemoryBuffer *output,
+                                                    const rcti &area,
+                                                    Span<MemoryBuffer *> inputs)
+{
+  MaskFunc mask_func;
+  switch (m_maskType) {
+    case CMP_NODE_MASKTYPE_ADD:
+      mask_func = [](const bool is_inside, const float *mask, const float *value) {
+        return is_inside ? MAX2(mask[0], value[0]) : mask[0];
+      };
+      break;
+    case CMP_NODE_MASKTYPE_SUBTRACT:
+      mask_func = [](const bool is_inside, const float *mask, const float *value) {
+        return is_inside ? CLAMPIS(mask[0] - value[0], 0, 1) : mask[0];
+      };
+      break;
+    case CMP_NODE_MASKTYPE_MULTIPLY:
+      mask_func = [](const bool is_inside, const float *mask, const float *value) {
+        return is_inside ? mask[0] * value[0] : 0;
+      };
+      break;
+    case CMP_NODE_MASKTYPE_NOT:
+      mask_func = [](const bool is_inside, const float *mask, const float *value) {
+        if (is_inside) {
+          return mask[0] > 0.0f ? 0.0f : value[0];
+        }
+        return mask[0];
+      };
+      break;
+  }
+  apply_mask(output, area, inputs, mask_func);
+}
+
+void BoxMaskOperation::apply_mask(MemoryBuffer *output,
+                                  const rcti &area,
+                                  Span<MemoryBuffer *> inputs,
+                                  MaskFunc mask_func)
+{
+  const float op_w = this->getWidth();
+  const float op_h = this->getHeight();
+  const float half_w = this->m_data->width / 2.0f;
+  const float half_h = this->m_data->height / 2.0f;
+  for (BuffersIterator<float> it = output->iterate_with(inputs, area); !it.is_end(); ++it) {
+    const float op_ry = it.y / op_h;
+    const float dy = (op_ry - this->m_data->y) / m_aspectRatio;
+    const float op_rx = it.x / op_w;
+    const float dx = op_rx - this->m_data->x;
+    const float rx = this->m_data->x + (m_cosine * dx + m_sine * dy);
+    const float ry = this->m_data->y + (-m_sine * dx + m_cosine * dy);
+
+    const bool inside = (rx > this->m_data->x - half_w && rx < this->m_data->x + half_w &&
+                         ry > this->m_data->y - half_h && ry < this->m_data->y + half_h);
+    const float *mask = it.in(0);
+    const float *value = it.in(1);
+    *it.out = mask_func(inside, mask, value);
+  }
+}
+
 void BoxMaskOperation::deinitExecution()
 {
   this->m_inputMask = nullptr;
diff --git a/source/blender/compositor/operations/COM_BoxMaskOperation.h b/source/blender/compositor/operations/COM_BoxMaskOperation.h
index fdec7bdd8ca..4c48dde844a 100644
--- a/source/blender/compositor/operations/COM_BoxMaskOperation.h
+++ b/source/blender/compositor/operations/COM_BoxMaskOperation.h
@@ -18,12 +18,14 @@
 
 #pragma once
 
-#include "COM_NodeOperation.h"
+#include "COM_MultiThreadedOperation.h"
 
 namespace blender::compositor {
 
-class BoxMaskOperation : public NodeOperation {
+class BoxMaskOperation : public MultiThreadedOperation {
  private:
+  using MaskFunc = std::function<float(bool is_inside, const float *mask, const float *value)>;
+
   /**
    * Cached reference to the inputProgram
    */
@@ -64,6 +66,16 @@ class BoxMaskOperation : public NodeOperation {
   {
     this->m_maskType = maskType;
   }
+
+  void update_memory_buffer_partial(MemoryBuffer *output,
+                                    const rcti &area,
+                                    Span<MemoryBuffer *> inputs) override;
+
+ private:
+  void apply_mask(MemoryBuffer *output,
+                  const rcti &area,
+                  Span<MemoryBuffer *> inputs,
+                  MaskFunc mask_func);
 };
 
 }  // namespace blender::compositor
-- 
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