From 9d6c681037eb4fb3c6d9eca6b1ff1d01d429614e Mon Sep 17 00:00:00 2001
From: Jonathan Bradley <jcb@pikum.xyz>
Date: Thu, 7 Sep 2023 22:44:12 -0400
Subject: entities and memory allocation checkpoint

---
 src/entities.cpp         | 41 ++++++++++++++++++++++++++++++++++++
 src/entities.hpp         | 21 +++++++++++++++++++
 src/memory-allocator.hpp | 54 ++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 116 insertions(+)
 create mode 100644 src/entities.cpp
 create mode 100644 src/entities.hpp
 create mode 100644 src/memory-allocator.hpp

diff --git a/src/entities.cpp b/src/entities.cpp
new file mode 100644
index 0000000..fb2bc60
--- /dev/null
+++ b/src/entities.cpp
@@ -0,0 +1,41 @@
+
+#include "entities.hpp"
+#include "ecs.hpp"
+#include <vulkan/vulkan_core.h>
+
+void EntityType_Init() {}
+
+void EntityType_Load(EntityType &et) {
+	if (et.modelFile != nullptr && et.modelFile != CAFE_BABE(char)) {
+		assert(et.vkPipelineLayoutCreateInfo != nullptr && et.vkPipelineLayoutCreateInfo != CAFE_BABE(VkPipelineLayoutCreateInfo) && "EntityType with a defined model must also contain appropriate Vulkan CreateInfos");
+		AssetHandle assetHandle{AM_Register(et.modelFile)};
+		const Asset *asset = AM_Get(assetHandle);
+
+		CompGrBinds &grBinds = ECS_CreateGrBinds(et.entityHandle);
+		auto vkResult = vkCreatePipelineLayout(vkDevice, et.vkPipelineLayoutCreateInfo, vkAllocator, &grBinds.vkPipelineLayout);
+		assert(vkResult == VK_SUCCESS);
+		// TODO grBinds.vkDescriptorSet
+
+		cgltf_options options{};
+		cgltf_data *gltfData = nullptr;
+		cgltf_result result = cgltf_parse(&options, asset->ptr, asset->size, &gltfData);
+		assert(result == cgltf_result_success);
+		result = cgltf_validate(gltfData);
+		assert(result == cgltf_result_success);
+
+		// create buffers
+		// TODO
+
+		// create VkDeviceMemory
+		VkMemoryAllocateInfo vkMemoryAllocateInfo;
+		vkMemoryAllocateInfo.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO;
+		vkMemoryAllocateInfo.pNext = nullptr;
+		vkMemoryAllocateInfo.allocationSize = gltfData->buffers[0].size;;
+		vkMemoryAllocateInfo.memoryTypeIndex = FindMemoryTypeIndex(0, 0); // TODO
+
+		vkAllocateMemory(vkDevice, &vkMemoryAllocateInfo, vkAllocator, &grBinds.deviceMemory);
+
+		// TODO bind buffers to memory
+	}
+
+}
diff --git a/src/entities.hpp b/src/entities.hpp
new file mode 100644
index 0000000..5e80616
--- /dev/null
+++ b/src/entities.hpp
@@ -0,0 +1,21 @@
+#ifndef PKE_ENTITIES_HPP
+#define PKE_ENTITIES_HPP
+
+#include "vendor/cgltf-include.hpp"
+#include "ecs.hpp"
+#include "components.hpp"
+#include "asset-manager.hpp"
+#include "memory.hpp"
+#include "window.hpp"
+
+struct EntityType {
+	char *modelFile = nullptr;
+	char entityTypeCode[16] = {'\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0'};
+	EntityHandle entityHandle = EntityHandle_MAX;
+	VkPipelineLayoutCreateInfo *vkPipelineLayoutCreateInfo = nullptr;
+};
+
+void EntityType_Init();
+void EntityType_Load(EntityType et);
+
+#endif /* PKE_ENTITIES_HPP */
diff --git a/src/memory-allocator.hpp b/src/memory-allocator.hpp
new file mode 100644
index 0000000..c14304a
--- /dev/null
+++ b/src/memory-allocator.hpp
@@ -0,0 +1,54 @@
+#ifndef PKE_MEMORY_ALLOCATOR_HPP
+#define PKE_MEMORY_ALLOCATOR_HPP
+
+#include "memory.hpp"
+
+template <typename T, std::size_t SZ = DEFAULT_BUCKET_SIZE> class PkeTransAllocator {
+public:
+	typedef T value_type;
+	MemBucket *transientBucket = nullptr;
+
+	PkeTransAllocator() : transientBucket(Pke_BeginTransientBucket(SZ)) {
+	}
+	~PkeTransAllocator() {
+		Pke_EndTransientBucket(this->transientBucket);
+	}
+
+	template <class U> struct rebind {typedef PkeTransAllocator<U, SZ> other;};
+	template <typename U> explicit PkeTransAllocator(const PkeTransAllocator<U> &other) {
+		(void)other;
+	}
+
+	T *allocate(std::size_t n) {
+		auto *ptr = reinterpret_cast<T *>(Pke_New(sizeof(T) * n, this->transientBucket));
+		if (ptr) return ptr;
+		throw "Pke-Allocator Failed to allocate";
+	}
+
+	void deallocate(const T *ptr, std::size_t n) {
+		Pke_Delete(ptr, sizeof(T) * n, this->transientBucket);
+	}
+};
+
+template <typename T> class PkeAllocator {
+public:
+	typedef T value_type;
+
+	PkeAllocator() = default;
+
+	template <typename U> explicit PkeAllocator(const PkeAllocator<U> &other) {
+		(void)other;
+	}
+
+	T *allocate(std::size_t n) {
+		auto *ptr = Pke_New<T>(n);
+		if (ptr) return ptr;
+		throw "Pke-Allocator Failed to allocate";
+	}
+
+	void deallocate(const T *ptr, std::size_t n) {
+		Pke_Delete<T>(ptr, n);
+	}
+};
+
+#endif /* PKE_MEMORY_ALLOCATOR_HPP */
-- 
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