scan.h

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/*
 * SPDX-FileCopyrightText: 1996, 1998, 1999, 2002, Roy Ratcliffe, Northumberland, United Kingdom
 * SPDX-License-Identifier: MIT
 */
#ifndef __BLIT_SCAN_H__
#define __BLIT_SCAN_H__
 
#include <stdint.h>
 
typedef uint8_t blit_scanline_t;
 
struct blit_scan {
  blit_scanline_t *store;
  int width;
  int height;
  int stride;
};
 
#define BLIT_SCAN_DEFINE(name, width, height)                                                                                                                  \
  blit_scanline_t name##_store[(((width) + 7) >> 3) * (height)];                                                                                               \
  struct blit_scan name = {name##_store, (width), (height), ((width) + 7) >> 3}
 
#define BLIT_SCAN_DEFINE_STATIC(name, width, height)                                                                                                           \
  static blit_scanline_t name##_store[(((width) + 7) >> 3) * (height)];                                                                                        \
  static struct blit_scan name = {name##_store, (width), (height), ((width) + 7) >> 3}
 
static inline blit_scanline_t *blit_scan_find(const struct blit_scan *scan, int x, int y) { return scan->store + scan->stride * y + (x >> 3); }
 
#endif /* __BLIT_SCAN_H__ */