From 82f72cae85a7459ef8d84d50c0bc14469b52218e Mon Sep 17 00:00:00 2001
From: durswd <swda.durl@gmail.com>
Date: Wed, 2 Aug 2023 22:39:12 +0900
Subject: [PATCH] Add a VertexBuffer on a memory

---
 .../GraphicsDeviceCPU.cpp                     | 20 +++++++++++++++++++
 .../GraphicsDeviceCPU.h                       | 19 ++++++++++++++++++
 2 files changed, 39 insertions(+)

diff --git a/Dev/Cpp/EffekseerRendererCommon/GraphicsDeviceCPU.cpp b/Dev/Cpp/EffekseerRendererCommon/GraphicsDeviceCPU.cpp
index 0eca6ec92b..1a2a3b3f3d 100644
--- a/Dev/Cpp/EffekseerRendererCommon/GraphicsDeviceCPU.cpp
+++ b/Dev/Cpp/EffekseerRendererCommon/GraphicsDeviceCPU.cpp
@@ -4,6 +4,21 @@ namespace EffekseerRendererCPU
 {
 namespace Backend
 {
+
+VertexBuffer::VertexBuffer(int32_t size, const void* initialData, bool isDynamic)
+{
+	buffer_.resize(size);
+	if (initialData != nullptr)
+	{
+		memcpy(buffer_.data(), initialData, buffer_.size());
+	}
+}
+
+void VertexBuffer::UpdateData(const void* src, int32_t size, int32_t offset)
+{
+	memcpy(buffer_.data() + offset, src, size);
+}
+
 IndexBuffer::IndexBuffer(int32_t elementCount, const void* initialData, Effekseer::Backend::IndexBufferStrideType strideType)
 {
 	elementCount_ = elementCount;
@@ -23,6 +38,11 @@ void IndexBuffer::UpdateData(const void* src, int32_t size, int32_t offset)
 	memcpy(buffer_.data() + offset, src, size);
 }
 
+Effekseer::Backend::VertexBufferRef GraphicsDevice::CreateVertexBuffer(int32_t size, const void* initialData, bool isDynamic)
+{
+	return Effekseer::MakeRefPtr<VertexBuffer>(size, initialData, isDynamic);
+}
+
 Effekseer::Backend::IndexBufferRef GraphicsDevice::CreateIndexBuffer(int32_t elementCount, const void* initialData, Effekseer::Backend::IndexBufferStrideType stride)
 {
 	return Effekseer::MakeRefPtr<IndexBuffer>(elementCount, initialData, stride);
diff --git a/Dev/Cpp/EffekseerRendererCommon/GraphicsDeviceCPU.h b/Dev/Cpp/EffekseerRendererCommon/GraphicsDeviceCPU.h
index f3ba2911e3..d069d46b7b 100644
--- a/Dev/Cpp/EffekseerRendererCommon/GraphicsDeviceCPU.h
+++ b/Dev/Cpp/EffekseerRendererCommon/GraphicsDeviceCPU.h
@@ -8,6 +8,23 @@ namespace EffekseerRendererCPU
 namespace Backend
 {
 
+class VertexBuffer
+	: public Effekseer::Backend::VertexBuffer
+{
+private:
+	std::vector<uint8_t> buffer_;
+
+public:
+	VertexBuffer(int32_t size, const void* initialData, bool isDynamic);
+	~VertexBuffer() override = default;
+	void UpdateData(const void* src, int32_t size, int32_t offset) override;
+
+	const std::vector<uint8_t>& GetBuffer() const
+	{
+		return buffer_;
+	}
+};
+
 class IndexBuffer
 	: public Effekseer::Backend::IndexBuffer
 {
@@ -26,6 +43,8 @@ class GraphicsDevice : public Effekseer::Backend::GraphicsDevice
 	GraphicsDevice() = default;
 	~GraphicsDevice() override = default;
 
+	Effekseer::Backend::VertexBufferRef CreateVertexBuffer(int32_t size, const void* initialData, bool isDynamic) override;
+
 	Effekseer::Backend::IndexBufferRef CreateIndexBuffer(int32_t elementCount, const void* initialData, Effekseer::Backend::IndexBufferStrideType stride) override;
 };