#ifndef _FB_H
#define _FB_H

#include <stdint.h>
#include <sys/types.h>
#include <xf86drmMode.h> /* for drmModeModeInfoPtr */

/* All renderers should target fb_fragment_t, which may or may not represent
 * a full-screen mmap.  Helpers are provided for subdividing fragments for
 * concurrent renderers.
 */
typedef struct fb_fragment_t {
	uint32_t	*buf;		/* pointer to the first pixel in the fragment */
	unsigned	x, y;		/* absolute coordinates of the upper left corner of this fragment */
	unsigned	width, height;	/* width and height of this fragment */
	unsigned	stride;		/* number of bytes from the end of one row to the start of the next */
} fb_fragment_t;

/* This is a page handle object for page flip submission/life-cycle.
 * Outside of fb_page_get()/fb_page_put(), you're going to be interested in
 * fb_fragment_t.  The fragment included here describes the whole page,
 * it may be divided via fb_fragment_divide().
 */
typedef struct fb_page_t {
	fb_fragment_t	fragment;
} fb_page_t;

typedef struct fb_t fb_t;

fb_page_t * fb_page_get(fb_t *fb);
void fb_page_put(fb_t *fb, fb_page_t *page);
void fb_free(fb_t *fb);
void fb_get_put_pages_count(fb_t *fb, unsigned *count);
fb_t * fb_new(int drm_fd, uint32_t crtc_id, uint32_t *connectors, int n_connectors, drmModeModeInfoPtr mode, int n_pages);
void fb_fragment_divide(fb_fragment_t *fragment, unsigned n_fragments, fb_fragment_t fragments[]);

#endif