VolumeTextureGenerator.h

#pragma once
#include <functional>
#include "../../Matrix.h"
 
namespace CSE {
 
    struct GLMeshID;
 
    class GLProgramHandle;
 
    class SMaterial;
 
    class VolumeTextureGenerator {
    public:
        VolumeTextureGenerator();
 
        ~VolumeTextureGenerator();
 
        void GenerateVolumeTexture(unsigned int level, const GLMeshID& mesh, const SMaterial& material);
 
    private:
        static int GetIndex(int level, int x, int y, int z);
 
        static void Render(int level, const GLMeshID& mesh, GLProgramHandle* handle);
 
        static unsigned char* CaptureBuffer();
 
        static int SavePng(const char* filename, int width, int height, int chennel, void* data);
 
        void ProcessAxisRender(unsigned int level, const GLMeshID& mesh, GLProgramHandle* handle,
                              unsigned char* data, const CSE::mat4& view,
                              const std::function<int(int, int, int, int)>& indexCalculator);
 
        void SetupFramebuffer(unsigned int& captureFBO, unsigned int& captureRBO,
                             unsigned int& tex, unsigned int tex2d_size);
 
    private:
        GLProgramHandle* m_handle = nullptr;
    };
}