Framebuffer.hpp

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#ifndef DONUT_GRAPHICS_FRAMEBUFFER_HPP
#define DONUT_GRAPHICS_FRAMEBUFFER_HPP
 
#include <donut/UniqueHandle.hpp>
#include <donut/graphics/Handle.hpp>
 
namespace donut::graphics {
 
class Texture; // Forward declaration, to avoid including Texture.hpp.
class Window;  // Forward declaration, to avoid a circular include of Window.hpp.
 
class Framebuffer {
public:
    class TextureAttachment {
    public:
        ~TextureAttachment();
 
        TextureAttachment(const TextureAttachment&) = delete;
        TextureAttachment(TextureAttachment&&) = delete;
        TextureAttachment& operator=(const TextureAttachment&) = delete;
        TextureAttachment& operator=(TextureAttachment&&) = delete;
 
    private:
        friend Framebuffer;
 
        [[nodiscard]] TextureAttachment(Framebuffer& framebuffer, Texture& texture);
 
        Framebuffer& framebuffer;
    };
 
    Framebuffer();
 
    [[nodiscard]] TextureAttachment attachTexture2D(Texture& texture) {
        return TextureAttachment{*this, texture};
    }
 
    [[nodiscard]] Handle get() const noexcept {
        return fbo.get();
    }
 
private:
    friend Window;
 
    explicit Framebuffer(Handle handle) noexcept
        : fbo(handle) {}
 
    struct FramebufferDeleter {
        void operator()(Handle handle) const noexcept;
    };
 
    UniqueHandle<Handle, FramebufferDeleter> fbo{};
};
 
} // namespace donut::graphics
 
#endif