Add Chromium-only Blender WebEngine parity work

blender-5.2.0/intern/cycles/scene/particles.cpp

@@ -0,0 +1,131 @@
+/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
+ *
+ * SPDX-License-Identifier: Apache-2.0 */
+
+#include "scene/particles.h"
+#include "device/device.h"
+#include "scene/scene.h"
+#include "scene/stats.h"
+
+#include "util/log.h"
+#include "util/progress.h"
+
+CCL_NAMESPACE_BEGIN
+
+/* Particle System */
+
+NODE_DEFINE(ParticleSystem)
+{
+  NodeType *type = NodeType::add("particle_system", create);
+  return type;
+}
+
+ParticleSystem::ParticleSystem() : Node(get_node_type()) {}
+
+ParticleSystem::~ParticleSystem() = default;
+
+void ParticleSystem::tag_update(Scene *scene)
+{
+  scene->particle_system_manager->tag_update(scene);
+}
+
+/* Particle System Manager */
+
+ParticleSystemManager::ParticleSystemManager()
+{
+  need_update_ = true;
+}
+
+ParticleSystemManager::~ParticleSystemManager() = default;
+
+void ParticleSystemManager::device_update_particles(Device * /*unused*/,
+                                                    DeviceScene *dscene,
+                                                    Scene *scene,
+                                                    Progress &progress)
+{
+  /* count particles.
+   * adds one dummy particle at the beginning to avoid invalid lookups,
+   * in case a shader uses particle info without actual particle data. */
+  int num_particles = 1;
+  for (size_t j = 0; j < scene->particle_systems.size(); j++) {
+    num_particles += scene->particle_systems[j]->particles.size();
+  }
+
+  KernelParticle *kparticles = dscene->particles.alloc(num_particles);
+
+  /* dummy particle */
+  *kparticles = KernelParticle{};
+
+  int i = 1;
+  for (size_t j = 0; j < scene->particle_systems.size(); j++) {
+    ParticleSystem *psys = scene->particle_systems[j];
+
+    for (size_t k = 0; k < psys->particles.size(); k++) {
+      /* pack in texture */
+      const Particle &pa = psys->particles[k];
+
+      kparticles[i].index = pa.index;
+      kparticles[i].age = pa.age;
+      kparticles[i].lifetime = pa.lifetime;
+      kparticles[i].size = pa.size;
+      kparticles[i].rotation = pa.rotation;
+      kparticles[i].location = make_float4(pa.location);
+      kparticles[i].velocity = make_float4(pa.velocity);
+      kparticles[i].angular_velocity = make_float4(pa.angular_velocity);
+
+      i++;
+
+      if (progress.get_cancel()) {
+        return;
+      }
+    }
+  }
+
+  dscene->particles.copy_to_device();
+}
+
+void ParticleSystemManager::device_update(Device *device,
+                                          DeviceScene *dscene,
+                                          Scene *scene,
+                                          Progress &progress)
+{
+  if (!need_update()) {
+    return;
+  }
+
+  const scoped_callback_timer timer([scene](double time) {
+    if (scene->update_stats) {
+      scene->update_stats->particles.times.add_entry({"device_update", time});
+    }
+  });
+
+  LOG_INFO << "Total " << scene->particle_systems.size() << " particle systems.";
+
+  device_free(device, dscene);
+
+  progress.set_status("Updating Particle Systems", "Copying Particles to device");
+  device_update_particles(device, dscene, scene, progress);
+
+  if (progress.get_cancel()) {
+    return;
+  }
+
+  need_update_ = false;
+}
+
+void ParticleSystemManager::device_free(Device * /*unused*/, DeviceScene *dscene)
+{
+  dscene->particles.free();
+}
+
+void ParticleSystemManager::tag_update(Scene * /*scene*/)
+{
+  need_update_ = true;
+}
+
+bool ParticleSystemManager::need_update() const
+{
+  return need_update_;
+}
+
+CCL_NAMESPACE_END