CommandBuffer.h

// Copyright 2022 ShenMian
// License(Apache-2.0)
 
#pragma once
 
#include "Program.h"
#include <functional>
#include <math/math.hpp>
#include <memory>
 
class Texture;
class Pipeline;
class VertexBuffer;
class IndexBuffer;
struct Viewport;
 
struct ClearFlag
{
    enum
    {
        Color   = 1 << 0,
        Depth   = 1 << 1,
        Stencil = 1 << 2
    };
};
 
class CommandBuffer
{
public:
    static std::shared_ptr<CommandBuffer> create();
 
    virtual void begin() = 0;
 
    virtual void end() = 0;
 
    virtual void begin_render_pass() = 0;
    virtual void end_render_pass()   = 0;
 
    virtual void set_viewport(const Viewport& viewport)                           = 0;
    virtual void set_pipeline(std::shared_ptr<Pipeline> pipeline)                 = 0;
    virtual void set_vertex_buffer(std::shared_ptr<VertexBuffer> vertex_buffer)     = 0;
    virtual void set_index_buffer(std::shared_ptr<IndexBuffer> index_buffer)        = 0;
    virtual void set_texture(std::shared_ptr<Texture> texture, unsigned int slot) = 0;
 
    virtual void clear(uint8_t flags) = 0;
 
    virtual void set_clear_color(const Vector4& color) = 0;
 
    virtual void set_clear_depth(float depth) = 0;
 
    virtual void set_clear_stencil(uint32_t value) = 0;
 
    virtual void draw(uint32_t vertex_count, uint32_t first_vertex = 0)      = 0;
    virtual void draw_indexed(uint32_t index_count, uint32_t first_index = 0) = 0;
};