swap_chain.h

#pragma once

#include "util/assert.h"
#include "renderer/buffers/color_buffer.h"

#define SWAP_CHAIN_MAX_BUFFER_COUNT 4

namespace blowbox
{
    class Device;

    class SwapChain
    {
    public:
        SwapChain();
        ~SwapChain();

        void Create(HWND output_window, UINT width, UINT height, DXGI_FORMAT format, UINT buffer_count, DXGI_SWAP_EFFECT swap_effect, UINT flags, bool disable_alt_enter = true, bool windowed = true);
        
        void Present(bool vsync = true);

        ColorBuffer& GetBuffer(UINT buffer_index) { BLOWBOX_ASSERT(buffer_index < buffer_count_); return buffers_[buffer_index]; }

        const ColorBuffer& GetBuffer(UINT buffer_index) const { BLOWBOX_ASSERT(buffer_index < buffer_count_); return buffers_[buffer_index]; }


        ColorBuffer& GetBackBuffer() { return buffers_[back_buffer_index_]; }

        const ColorBuffer& GetBackBuffer() const { return buffers_[back_buffer_index_]; }

        const UINT& GetBufferCount() const { return buffer_count_; }
        const UINT& GetBackBufferIndex() const { return back_buffer_index_; }

        const UINT& GetBufferWidth() const { return desc_.BufferDesc.Width; }
        const UINT& GetBufferHeight() const { return desc_.BufferDesc.Height; }

        operator IDXGISwapChain*() { return swap_chain_; }

        IDXGISwapChain* operator->() { return swap_chain_; }
        const IDXGISwapChain* operator->() const { return swap_chain_; }
    protected:
        DXGI_SWAP_CHAIN_DESC DescribeSwapChain(HWND output_window, UINT width, UINT height, DXGI_FORMAT format, UINT buffer_count, DXGI_SWAP_EFFECT swap_effect, UINT flags, bool windowed = true);

    private:
        IDXGISwapChain* swap_chain_;                        
        DXGI_SWAP_CHAIN_DESC desc_;                         
        UINT back_buffer_index_;                            
        UINT buffer_count_;                                 
        ColorBuffer buffers_[SWAP_CHAIN_MAX_BUFFER_COUNT];  
    };
}