bitblit 예제

/*
 Copyright (C) Information Equipment co.,LTD.
 All rights reserved.
 Code by JaeHyuk Cho <mailto:minzkn@infoeq.com>
 CVSTAG="$Header: /usr/local/mutihost/joinc/modules/moniwiki/data/text/RCS/Code_2fC_2fbitblit,v 1.2 2010/02/06 08:59:07 root Exp root $"
*/

#include <stdio.h>
#include <memory.h>

#define __def_bitblit_fastcall__
#define __bitblit_peek_vector__(m_cast,m_base,m_sign,m_offset) ((m_cast)(((unsigned char *)(m_base)) m_sign (size_t)(m_offset)))
#define __bitblit_peek__(m_base,m_offset)                      __bitblit_peek_vector__(void *,m_base,+,m_offset)

void (__def_bitblit_fastcall__ bitblit)(
 void *s_map, int s_bpp, int s_resx, int s_resy, int s_line_length,
 const void *s_data, int s_x, int s_y, int s_w, int s_h)
{
 int s_nbytes, s_tw;
 void *s_ptr;
 s_nbytes = s_bpp >> 3;
 if(s_y < 0)
 {
  s_h += s_y;
  s_data = __bitblit_peek__(s_data, (-s_y) * s_w * s_nbytes);
  s_y = 0;
 }
 if((s_y + s_h) >= s_resy)s_h = s_resy - s_y;
 if(s_h <= 0)return;
 if(s_x < 0)
 {
  s_tw = s_w + s_x;
  s_data = __bitblit_peek__(s_data, (-s_x) * s_nbytes);
  s_x = 0;
 }
 else s_tw = s_w;
 if((s_x + s_tw) >= s_resx)s_tw = s_resx - s_x;\
 if(s_tw <= 0)return;
 s_tw = s_tw * s_nbytes;
 s_w = s_w * s_nbytes;
 s_ptr = __bitblit_peek__(s_map, (s_y * s_line_length) + (s_x * s_nbytes));
 while(s_h--)
 {
  (void)memcpy(s_ptr, s_data, (size_t)s_tw);
  s_data = __bitblit_peek__(s_data, s_w);
  s_ptr = __bitblit_peek__(s_ptr, s_line_length);
 }
}

int main(void)
{
 unsigned char s_source_map[] = { /* 5x5 8bpp bitmap */
  1, 1, 1, 1, 1,
  1, 0, 0, 0, 1,
  1, 0, 0, 0, 1,
  1, 0, 0, 0, 1,
  1, 1, 1, 1, 1,
 };

#define resx (40)   /* pixel */
#define resy (25)   /* pixel */
#define bpp  (8)    /* bit */
#define shadow (4) /* pixel */
#define line_length ((resx + shadow) * bpp)    /* bytes */
 unsigned char s_fbmap[ line_length * resy ] = {0, };

 bitblit((void *)(&s_fbmap[0]), bpp, resx, resy, line_length,
  (void *)(&s_source_map[0]), -2, -2, 5, 5);

 bitblit((void *)(&s_fbmap[0]), bpp, resx, resy, line_length,
  (void *)(&s_source_map[0]), 10, 10, 5, 5);

 bitblit((void *)(&s_fbmap[0]), bpp, resx, resy, line_length,
  (void *)(&s_source_map[0]), 13, 13, 5, 5);

 bitblit((void *)(&s_fbmap[0]), bpp, resx, resy, line_length,
  (void *)(&s_source_map[0]), -2, resy - 3, 5, 5);
 bitblit((void *)(&s_fbmap[0]), bpp, resx, resy, line_length,
  (void *)(&s_source_map[0]), resx >> 1, resy - 3, 5, 5);
 bitblit((void *)(&s_fbmap[0]), bpp, resx, resy, line_length,
  (void *)(&s_source_map[0]), resx - 3, resy - 3, 5, 5);

 do
 { /* H/W refresh */
  int s_cx, s_cy, s_offset;
  s_offset = 0;
  for(s_cy = 0;s_cy < resy;s_cy++, s_offset += line_length)
  {
   for(s_cx = 0;s_cx < resx;s_cx++)
   { /* real view */
    if(s_fbmap[s_offset + s_cx])(void)putchar('O');
    else putchar('.');
   }
   for(;s_cx < resx + shadow;s_cx++)
   { /* shadow */
    (void)putchar('X');
   }
   (void)putchar('\n');
  }
  (void)fflush(stdout);
 }while(0);

 return(0);
}

/* End of source */