renderPass.h

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//
// Created by allos on 10/16/2024.
//
#pragma once
 
#include <math/vecs.h>
#include <renderer/shader.h>
 
using namespace catos::math;
 
namespace catos {
 
    typedef unsigned int ColorBuffer;
    typedef unsigned int FrameBuffer;
    typedef unsigned int RenderBuffer;
 
    enum PassType: unsigned int {
        COLOR =  0x8CE0,
        COLOR_SINGLE = 0x8CE1,
        DEPTH = 0x8D00,
        STENCIL = 0x8D20,
    };
 
    struct RenderPassCreationInfo {
        bool willBeVisible = false;
 
        Vector2 size{512, 512};
 
        bool resizeToRenderSize = false;
 
        PassType passType = PassType::COLOR;
 
    };
 
    /* a RenderPass is a object that renders everything with a given shader
     * This then generates a texture which can be used for displaying or info for a different pass / shader.
     */
    class RenderPass {
 
    public:
 
        RenderPass(const RenderPassCreationInfo& info, Shader& shaderToUse);
        ~RenderPass();
 
        void bindPass();
        void unbindPass();
 
        FrameBuffer getFrameBuffer() { return frameBuffer; };
        ColorBuffer getPassTexture() { return colorBuffer; };
        RenderBuffer getRenderBuffer() { return renderBuffer; };
 
        bool isFinal() { return _isFinal; };
 
    private:
 
        void generateFrameBuffer(const Vector2& size);
        void generateColorBuffer(const Vector2& size, PassType type);
        void generateRenderBuffer(const Vector2& size);
 
 
        unsigned int frameBuffer;
        unsigned int colorBuffer;
        unsigned int renderBuffer;
 
        bool _isFinal = false;
        bool _shouldResize = false;
 
        Shader& shader;
 
    };
 
 
}