LXR linux/drivers/video/fbdev/atafb

   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/string.h>
  13#include <linux/fb.h>
  14
  15#include "atafb.h"
  16#include "atafb_utils.h"
  17
  18
  19    /*
  20     *  Monochrome
  21     */
  22
  23void atafb_mfb_copyarea(struct fb_info *info, u_long next_line,
  24                        int sy, int sx, int dy, int dx,
  25                        int height, int width)
  26{
  27        u8 *src, *dest;
  28        u_int rows;
  29
  30        if (sx == 0 && dx == 0 && width == next_line) {
  31                src = (u8 *)info->screen_base + sy * (width >> 3);
  32                dest = (u8 *)info->screen_base + dy * (width >> 3);
  33                fb_memmove(dest, src, height * (width >> 3));
  34        } else if (dy <= sy) {
  35                src = (u8 *)info->screen_base + sy * next_line + (sx >> 3);
  36                dest = (u8 *)info->screen_base + dy * next_line + (dx >> 3);
  37                for (rows = height; rows--;) {
  38                        fb_memmove(dest, src, width >> 3);
  39                        src += next_line;
  40                        dest += next_line;
  41                }
  42        } else {
  43                src = (u8 *)info->screen_base + (sy + height - 1) * next_line + (sx >> 3);
  44                dest = (u8 *)info->screen_base + (dy + height - 1) * next_line + (dx >> 3);
  45                for (rows = height; rows--;) {
  46                        fb_memmove(dest, src, width >> 3);
  47                        src -= next_line;
  48                        dest -= next_line;
  49                }
  50        }
  51}
  52
  53void atafb_mfb_fillrect(struct fb_info *info, u_long next_line, u32 color,
  54                        int sy, int sx, int height, int width)
  55{
  56        u8 *dest;
  57        u_int rows;
  58
  59        dest = (u8 *)info->screen_base + sy * next_line + (sx >> 3);
  60
  61        if (sx == 0 && width == next_line) {
  62                if (color)
  63                        fb_memset255(dest, height * (width >> 3));
  64                else
  65                        fb_memclear(dest, height * (width >> 3));
  66        } else {
  67                for (rows = height; rows--; dest += next_line) {
  68                        if (color)
  69                                fb_memset255(dest, width >> 3);
  70                        else
  71                                fb_memclear_small(dest, width >> 3);
  72                }
  73        }
  74}
  75
  76void atafb_mfb_linefill(struct fb_info *info, u_long next_line,
  77                        int dy, int dx, u32 width,
  78                        const u8 *data, u32 bgcolor, u32 fgcolor)
  79{
  80        u8 *dest;
  81        u_int rows;
  82
  83        dest = (u8 *)info->screen_base + dy * next_line + (dx >> 3);
  84
  85        for (rows = width / 8; rows--; /* check margins */ ) {
  86                // use fast_memmove or fb_memmove
  87                *dest++ = *data++;
  88        }
  89}
  90