render.h

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#ifndef NNGN_RENDER_RENDER_H
#define NNGN_RENDER_RENDER_H
 
#include <vector>
 
#include "lua/table.h"
#include "utils/flags.h"
 
#include "renderers.h"
 
namespace nngn {
 
struct Graphics;
class Textures;
 
class Renderers {
public:
    enum Debug : u8 {
        DEBUG_RENDERERS = 1u << 0,
        DEBUG_ALL = (1u << 1) - 1,
    };
    // Initialization
    void init(Textures *t);
    // Configuration
    auto debug(void) const { return *this->m_debug; }
    bool perspective(void) const;
    auto max_sprites(void) const { return this->sprites.capacity(); }
    std::size_t n(void) const;
    std::size_t n_sprites(void) const { return this->sprites.size(); }
    void set_debug(Debug d);
    void set_perspective(bool p);
    bool set_max_sprites(std::size_t n);
    bool set_graphics(Graphics *g);
    // Operations
    Renderer *load(nngn::lua::table_view t);
    void remove(Renderer *p);
    bool update(void);
private:
    bool update_renderers(bool sprites_updated);
    bool update_debug(bool sprites_updated);
    enum Flag : u8 {
        SPRITES_UPDATED = 1u << 0,
        DEBUG_UPDATED = 1u << 1,
        PERSPECTIVE = 1u << 2,
    };
    Flags<Flag> flags = {};
    Flags<Debug> m_debug = {};
    Textures *textures = nullptr;
    Graphics *graphics = nullptr;
    std::vector<SpriteRenderer> sprites = {};
    u32
        sprite_vbo = {}, sprite_ebo = {},
        sprite_debug_vbo = {}, sprite_debug_ebo = {};
};
 
inline bool Renderers::perspective(void) const {
    return this->flags.is_set(Flag::PERSPECTIVE);
}
 
}
 
#endif