From 43821b0cffc5aa419c0218992f06f8962ae54a13 Mon Sep 17 00:00:00 2001
From: Frederico Linhares <fred@linhares.blue>
Date: Wed, 8 May 2024 17:56:29 -0300
Subject: refa Rename graphical engine to BluCat

---
 src/blucat/view_3d.cpp | 155 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 155 insertions(+)
 create mode 100644 src/blucat/view_3d.cpp

(limited to 'src/blucat/view_3d.cpp')

diff --git a/src/blucat/view_3d.cpp b/src/blucat/view_3d.cpp
new file mode 100644
index 0000000..4b7b959
--- /dev/null
+++ b/src/blucat/view_3d.cpp
@@ -0,0 +1,155 @@
+/*
+ * Copyright 2022-2024 Frederico de Oliveira Linhares
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "view_3d.hpp"
+
+#include <array>
+
+#include "../core.hpp"
+#include "uniform_data_object.hpp"
+
+namespace
+{
+
+void
+load_3d_uniform_buffer(void *obj)
+{
+  auto self = static_cast<BluCat::View3D*>(obj);
+
+  try
+  {
+    self->ub_3d.reserve(cg_core.vk_swapchain->images_count);
+    for(auto i{0}; i < cg_core.vk_swapchain->images_count; i++)
+      self->ub_3d.emplace_back(
+	cg_core.vk_device_with_swapchain, sizeof(BluCat::UDOView3D));
+  }
+  catch(const std::exception& e)
+  {
+    throw CommandError{e.what()};
+  }
+}
+
+void
+unload_3d_uniform_buffer(void *obj)
+{
+  auto self = static_cast<BluCat::View3D*>(obj);
+
+  self->ub_3d.clear();
+}
+
+void
+load_descriptor_sets_3d(void *obj)
+{
+  auto self = static_cast<BluCat::View3D*>(obj);
+
+  std::vector<VkDescriptorSetLayout> layouts(
+    cg_core.vk_swapchain->images_count,
+    cg_core.vk_descriptor_set_layout->view);
+
+  VkDescriptorSetAllocateInfo alloc_info{};
+  alloc_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO;
+  alloc_info.descriptorPool = self->descriptor_pool;
+  alloc_info.descriptorSetCount = layouts.size();
+  alloc_info.pSetLayouts = layouts.data();
+
+  self->descriptor_sets_3d.resize(layouts.size());
+  if(vkAllocateDescriptorSets(
+       cg_core.vk_device_with_swapchain->device, &alloc_info,
+       self->descriptor_sets_3d.data()) != VK_SUCCESS)
+    throw CommandError{"Failed to create Vulkan descriptor sets for view."};
+}
+
+void
+load_resources_to_descriptor_sets_3d(void *obj)
+{
+  auto self = static_cast<BluCat::View3D*>(obj);
+
+  for(auto i{0}; i < self->ub_3d.size(); i++)
+  {
+    VkDescriptorBufferInfo view_3d_info{};
+    view_3d_info.buffer = self->ub_3d[i].buffer;
+    view_3d_info.offset = 0;
+    view_3d_info.range = sizeof(BluCat::UDOView3D);
+
+    std::array<VkWriteDescriptorSet, 1> write_descriptors{};
+    write_descriptors[0].sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
+    write_descriptors[0].dstSet = self->descriptor_sets_3d[i];
+    write_descriptors[0].dstBinding = 0;
+    write_descriptors[0].dstArrayElement = 0;
+    write_descriptors[0].descriptorCount = 1;
+    write_descriptors[0].descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
+    write_descriptors[0].pBufferInfo = &view_3d_info;
+    write_descriptors[0].pImageInfo = nullptr;
+    write_descriptors[0].pTexelBufferView = nullptr;
+
+    vkUpdateDescriptorSets(
+      cg_core.vk_device_with_swapchain->device, write_descriptors.size(),
+      write_descriptors.data(), 0, nullptr);
+  }
+}
+
+const CommandChain loader{
+  {&load_3d_uniform_buffer, &unload_3d_uniform_buffer}
+};
+
+const CommandChain descriptor_sets_loader{
+  {&load_descriptor_sets_3d, nullptr},
+  {&load_resources_to_descriptor_sets_3d, nullptr}
+};
+
+}
+
+namespace BluCat
+{
+
+View3D::View3D(
+  glm::vec4 region, float projection_width, float projection_height):
+  View2D{region, projection_width, projection_height},
+  field_of_view{45.0f},
+  camera_position{std::make_shared<glm::vec3>(0.0f, 0.0f, 0.0f)},
+  camera_orientation{std::make_shared<glm::quat>(0.0f, 0.0f, 0.0f, 0.0f)}
+{
+  ::loader.execute(this);
+}
+
+View3D::~View3D()
+{
+  ::loader.revert(this);
+}
+
+void
+View3D::load_descriptor_sets(VkDescriptorPool descriptor_pool)
+{
+  if(this->descriptor_pool != VK_NULL_HANDLE) return;
+
+  auto parent = dynamic_cast<BluCat::View2D*>(this);
+  this->descriptor_pool = descriptor_pool;
+  View2D::descriptor_sets_loader.execute(parent);
+  ::descriptor_sets_loader.execute(this);
+}
+
+void
+View3D::unload_descriptor_sets()
+{
+  if(this->descriptor_pool == VK_NULL_HANDLE) return;
+
+  auto parent = dynamic_cast<BluCat::View2D*>(this);
+  this->descriptor_pool = VK_NULL_HANDLE;
+  ::descriptor_sets_loader.revert(this);
+  View2D::descriptor_sets_loader.revert(parent);
+}
+
+}
-- 
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