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#pragma once
#include "VertexArray.h"
#include "Shader.h"
#include <glm/glm.hpp>
#include <memory>
namespace Donut
{
template<typename T>
using Scope = std::unique_ptr<T>;
template<typename T, typename ... Args>
constexpr Scope<T> CreateScope(Args&& ... args)
{
return std::make_unique<T>(std::forward<Args>(args)...);
}
class RendererAPI
{
public:
enum class API
{
None = 0,
OpenGL = 1,
Vulkan = 2,
};
public:
virtual ~RendererAPI() = default;
virtual void Init() = 0;
virtual void SetViewport(uint32_t x, uint32_t y, uint32_t width, uint32_t height) = 0;
virtual void SetClearColor(const glm::vec4& color) = 0;
virtual void Clear() = 0;
virtual void DrawIndexed(const std::shared_ptr<VertexArray>& vertexArray, uint32_t indexCount = 0) = 0;
inline static API GetAPI() { return s_API; }
static Scope<RendererAPI> Create();
private:
static API s_API;
};
class RenderCommand
{
public:
inline static void Init() {
s_RendererAPI->Init();
}
inline static void SetViewport(uint32_t x, uint32_t y, uint32_t width, uint32_t height) {
s_RendererAPI->SetViewport(x, y, width, height);
}
inline static void SetClearColor(const glm::vec4& color) {
s_RendererAPI->SetClearColor(color);
}
inline static void Clear() {
s_RendererAPI->Clear();
}
inline static void DrawIndexed(const std::shared_ptr<VertexArray>& vertexArray, uint32_t indexCount = 0) {
s_RendererAPI->DrawIndexed(vertexArray, indexCount);
}
private:
static Scope<RendererAPI> s_RendererAPI;
};
class Renderer
{
public:
static void Init();
static void Shutdown();
static void OnWindowResize(uint32_t width, uint32_t height);
static void BeginScene();
static void EndScene();
static void Submit(const std::shared_ptr<Shader>& shader,
const std::shared_ptr<VertexArray>& vertexArray,
const glm::mat4& transform = glm::mat4(1.0f));
static void SetClearColor(const glm::vec4& color);
static void Clear();
inline static RendererAPI::API GetAPI() { return RendererAPI::GetAPI(); }
private:
struct SceneData
{
glm::mat4 ViewProjectionMatrix;
};
static SceneData* s_SceneData;
};
};
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