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#ifndef MGL_WINDOW_H
#define MGL_WINDOW_H

#include "../graphics/color.h"
#include "../system/vec.h"
#include <stdbool.h>

/* Vsync is automatically set for windows created, if supported by the system */

typedef struct __GLXcontextRec *GLXContext;
typedef struct mgl_event mgl_event;
/* x11 window handle. TODO: Add others when wayland, etc is added */
typedef unsigned long mgl_window_handle;

typedef struct mgl_window mgl_window;

typedef struct {
    mgl_vec2i position;
    mgl_vec2i size;
} mgl_view;

struct mgl_window {
    mgl_window_handle window;
    GLXContext glx_context;
    mgl_vec2i size;
    /* relative to the top left of the window. only updates when the cursor is inside the window */
    mgl_vec2i cursor_position;
    mgl_view view;
};

int mgl_window_create(mgl_window *self, const char *title, int width, int height);
/* if |parent_window| is 0 then the root window is used */
int mgl_window_create_with_params(mgl_window *self, const char *title, int width, int height, mgl_window_handle parent_window);
int mgl_window_init_from_existing_window(mgl_window *self, mgl_window_handle existing_window);
void mgl_window_deinit(mgl_window *self);

void mgl_window_clear(mgl_window *self, mgl_color color);
bool mgl_window_poll_event(mgl_window *self, mgl_event *event);
void mgl_window_display(mgl_window *self);

/*
    The previous view is returned in |prev_view|. |prev_view| may be NULL.
    This should be called every frame to retain the view.
    Make sure to set the view back to |prev_view| after rendering items
    inside the view.
*/
void mgl_window_set_view(mgl_window *self, mgl_view *new_view, mgl_view *prev_view);

#endif /* MGL_WINDOW_H */