#include "CustomSwapChain.h"

namespace LifeGraphics
{
    CustomSwapChain::CustomSwapChain(uint16 width, uint16 height, uint16 buffer_cnt, LifeGraphics::IRenderer* host, IDataFormat format)
    :back_buffer(nullptr), depth_buffer(nullptr){
        if(!host){
            sc_width = sc_height = sc_buffers = 0;
            return;
        }
        sc_width = width;
        sc_height = height;
        sc_buffers = buffer_cnt;
        sc_format = format;
        sc_renderer = host;
        RebuildBuffers();
    }
    LifeGraphics::ITexture2D* CustomSwapChain::GetBackBuffer(uint8 id){
        return back_buffer;
    }
    LifeGraphics::ITexture2D* CustomSwapChain::GetDepthBuffer(uint8 id){
        return depth_buffer;
    }
    void CustomSwapChain::Resize(uint16 width, uint16 height){
        if(width != sc_width || height != sc_height){
            sc_width = width;
            sc_height = height;
            RebuildBuffers();
            Event_Resized.Invoke(this);
        }
    }
    void CustomSwapChain::Present(){
        Event_Presented.Invoke(this);
    }
    void CustomSwapChain::RebuildBuffers(){
        if(back_buffer)
            back_buffer->Release();

        if(depth_buffer)
            depth_buffer->Release();

        back_buffer = sc_renderer->CreateRenderTarget(sc_width, sc_height, sc_format);
        depth_buffer = sc_renderer->CreateDepthTarget(sc_width, sc_height, FORMAT_D24_UNORM_S8_UINT);
    }
}