managed_frame_buffer.h

#pragma once
 
#include <unordered_map>
 
#include <cgv/render/frame_buffer.h>
 
#include "lib_begin.h"
 
namespace cgv {
namespace render {

class CGV_API managed_frame_buffer
{
private:
    ivec2 get_actual_size(context& ctx);
 
    bool create_and_validate(context& ctx, const ivec2& size);
 
protected:
    struct attachment {
        unsigned index;
        bool attach;
        std::string format;
        TextureFilter tf;
        TextureWrap tw;
        texture tex;
 
        bool is_depth_attachment() const {
            return
                format == "[D]" ||
                format == "uint16[D]" ||
                format == "uint32[D:24]" ||
                format == "uint32[D]";
        }
    };
 
    frame_buffer fb;
    unsigned index_counter = 0;
    std::unordered_map<std::string, attachment> attachments;
    ivec2 size;
 
public:
    managed_frame_buffer();
 
    void destruct(const context& ctx);
 
    ivec2 get_size();

    void set_size(const ivec2& size);
 
    void add_attachment(const std::string& name, const std::string& format = "uint8[R,G,B]", TextureFilter tf = TF_NEAREST, TextureWrap tw = TW_CLAMP_TO_EDGE, bool attach = true);
 
    bool enable_attachment(context& ctx, const std::string& name, int tex_unit = -1);
 
    bool disable_attachment(context& ctx, const std::string& name);
 
    texture* attachment_texture_ptr(const std::string& name);

    bool ensure(context& ctx);
 
    bool enable(context& ctx, bool push_viewport=true);
    
    bool disable(context& ctx, bool pop_viewport=true);
    
    frame_buffer& ref_frame_buffer() { return fb; }
};
 
}
}
 
#include <cgv/config/lib_end.h>