From 78db82c0dac8db90a3de1004e5428f225947b2b9 Mon Sep 17 00:00:00 2001
From: Frederico Linhares <fred@linhares.blue>
Date: Wed, 21 Sep 2022 13:57:31 -0300
Subject: feat Create View2D

---
 src/vk/view_2d.cpp | 155 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 155 insertions(+)
 create mode 100644 src/vk/view_2d.cpp

(limited to 'src/vk/view_2d.cpp')

diff --git a/src/vk/view_2d.cpp b/src/vk/view_2d.cpp
new file mode 100644
index 0000000..623aa63
--- /dev/null
+++ b/src/vk/view_2d.cpp
@@ -0,0 +1,155 @@
+/*
+ * Copyright 2022 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_2d.hpp"
+
+#include <array>
+
+#include "../core.hpp"
+
+namespace
+{
+
+void
+load_2d_uniform_buffer(void *obj)
+{
+  auto self = static_cast<VK::View2D*>(obj);
+
+  try
+  {
+    self->ub_2d.reserve(cg_core.vk_swapchain->images_count);
+    for(auto i{0}; i < cg_core.vk_swapchain->images_count; i++)
+      self->ub_2d.emplace_back(
+	cg_core.vk_device_with_swapchain, sizeof(VK::UBOView2D));
+  }
+  catch(const std::exception& e)
+  {
+    throw CommandError{e.what()};
+  }
+}
+
+void
+unload_2d_uniform_buffer(void *obj)
+{
+  auto self = static_cast<VK::View2D*>(obj);
+
+  self->ub_2d.clear();
+}
+
+void
+load_descriptor_sets_2d(void *obj)
+{
+  auto self = static_cast<VK::View2D*>(obj);
+
+  std::vector<VkDescriptorSetLayout> layouts(
+    cg_core.vk_swapchain->images_count,
+    cg_core.vk_graphics_pipeline_2d_layout->descriptor_set_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_2d.resize(layouts.size());
+  if(vkAllocateDescriptorSets(
+       cg_core.vk_device_with_swapchain->device, &alloc_info,
+       self->descriptor_sets_2d.data()) != VK_SUCCESS)
+    throw CommandError{"Failed to create Vulkan descriptor sets for view."};
+}
+
+void
+load_resources_to_descriptor_sets_2d(void *obj)
+{
+  auto self = static_cast<VK::View2D*>(obj);
+
+  for(auto i{0}; i < self->ub_2d.size(); i++)
+  {
+    VkDescriptorBufferInfo view_2d_info{};
+    view_2d_info.buffer = self->ub_2d[i].buffer;
+    view_2d_info.offset = 0;
+    view_2d_info.range = sizeof(VK::UBOView2D);
+
+    std::array<VkWriteDescriptorSet, 1> write_descriptors{};
+    write_descriptors[0].sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
+    write_descriptors[0].dstSet = self->descriptor_sets_2d[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_2d_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);
+
+    VK::UBOView2D ubo_view_2d;
+    ubo_view_2d.proj = glm::ortho(
+      0.0f, self->region.z,
+      0.0f, self->region.w,
+      0.0f, 100.0f);
+    self->ub_2d[i].copy_data(&ubo_view_2d);
+  }
+}
+
+}
+
+namespace VK
+{
+
+const CommandChain View2D::loader{
+  {&load_2d_uniform_buffer, &unload_2d_uniform_buffer}
+};
+
+const CommandChain View2D::descriptor_sets_loader{
+  {&load_descriptor_sets_2d, nullptr},
+  {&load_resources_to_descriptor_sets_2d, nullptr}
+};
+
+View2D::View2D(glm::vec4 region):
+  region{region},
+  descriptor_pool{VK_NULL_HANDLE},
+  sprites_to_draw{cg_core.vk_swapchain->images_count}
+{
+  loader.execute(this);
+}
+
+View2D::~View2D()
+{
+  loader.revert(this);
+}
+
+void
+View2D::load_descriptor_sets(VkDescriptorPool descriptor_pool)
+{
+  if(this->descriptor_pool != VK_NULL_HANDLE) return;
+
+  this->descriptor_pool = descriptor_pool;
+  descriptor_sets_loader.execute(this);
+}
+
+void
+View2D::unload_descriptor_sets()
+{
+  if(this->descriptor_pool == VK_NULL_HANDLE) return;
+
+  this->descriptor_pool = VK_NULL_HANDLE;
+  descriptor_sets_loader.revert(this);
+}
+
+}
-- 
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