linux/drivers/video/atafb_mfb.c
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   1/*
   2 *  linux/drivers/video/mfb.c -- Low level frame buffer operations for
   3 *                               monochrome
   4 *
   5 *      Created 5 Apr 1997 by Geert Uytterhoeven
   6 *
   7 *  This file is subject to the terms and conditions of the GNU General Public
   8 *  License.  See the file COPYING in the main directory of this archive for
   9 *  more details.
  10 */
  11
  12#include <linux/module.h>
  13#include <linux/string.h>
  14#include <linux/fb.h>
  15
  16#include "atafb.h"
  17#include "atafb_utils.h"
  18
  19
  20    /*
  21     *  Monochrome
  22     */
  23
  24void atafb_mfb_copyarea(struct fb_info *info, u_long next_line,
  25                        int sy, int sx, int dy, int dx,
  26                        int height, int width)
  27{
  28        u8 *src, *dest;
  29        u_int rows;
  30
  31        if (sx == 0 && dx == 0 && width == next_line) {
  32                src = (u8 *)info->screen_base + sy * (width >> 3);
  33                dest = (u8 *)info->screen_base + dy * (width >> 3);
  34                fb_memmove(dest, src, height * (width >> 3));
  35        } else if (dy <= sy) {
  36                src = (u8 *)info->screen_base + sy * next_line + (sx >> 3);
  37                dest = (u8 *)info->screen_base + dy * next_line + (dx >> 3);
  38                for (rows = height; rows--;) {
  39                        fb_memmove(dest, src, width >> 3);
  40                        src += next_line;
  41                        dest += next_line;
  42                }
  43        } else {
  44                src = (u8 *)info->screen_base + (sy + height - 1) * next_line + (sx >> 3);
  45                dest = (u8 *)info->screen_base + (dy + height - 1) * next_line + (dx >> 3);
  46                for (rows = height; rows--;) {
  47                        fb_memmove(dest, src, width >> 3);
  48                        src -= next_line;
  49                        dest -= next_line;
  50                }
  51        }
  52}
  53
  54void atafb_mfb_fillrect(struct fb_info *info, u_long next_line, u32 color,
  55                        int sy, int sx, int height, int width)
  56{
  57        u8 *dest;
  58        u_int rows;
  59
  60        dest = (u8 *)info->screen_base + sy * next_line + (sx >> 3);
  61
  62        if (sx == 0 && width == next_line) {
  63                if (color)
  64                        fb_memset255(dest, height * (width >> 3));
  65                else
  66                        fb_memclear(dest, height * (width >> 3));
  67        } else {
  68                for (rows = height; rows--; dest += next_line) {
  69                        if (color)
  70                                fb_memset255(dest, width >> 3);
  71                        else
  72                                fb_memclear_small(dest, width >> 3);
  73                }
  74        }
  75}
  76
  77void atafb_mfb_linefill(struct fb_info *info, u_long next_line,
  78                        int dy, int dx, u32 width,
  79                        const u8 *data, u32 bgcolor, u32 fgcolor)
  80{
  81        u8 *dest;
  82        u_int rows;
  83
  84        dest = (u8 *)info->screen_base + dy * next_line + (dx >> 3);
  85
  86        for (rows = width / 8; rows--; /* check margins */ ) {
  87                // use fast_memmove or fb_memmove
  88                *dest++ = *data++;
  89        }
  90}
  91
  92#ifdef MODULE
  93MODULE_LICENSE("GPL");
  94
  95int init_module(void)
  96{
  97        return 0;
  98}
  99
 100void cleanup_module(void)
 101{
 102}
 103#endif /* MODULE */
 104
 105
 106    /*
 107     *  Visible symbols for modules
 108     */
 109
 110EXPORT_SYMBOL(atafb_mfb_copyarea);
 111EXPORT_SYMBOL(atafb_mfb_fillrect);
 112EXPORT_SYMBOL(atafb_mfb_linefill);
 113
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