drivers/video/fbdev/atafb_mfb.c

   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
  24 void 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
  54 void 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
  77 void 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
  93 MODULE_LICENSE("GPL");
  94
  95 int init_module(void)
  96 {
  97         return 0;
  98 }
  99
 100 void cleanup_module(void)
 101 {
 102 }
 103 #endif /* MODULE */
 104
 105
 106     /*
 107      *  Visible symbols for modules
 108      */
 109
 110 EXPORT_SYMBOL(atafb_mfb_copyarea);
 111 EXPORT_SYMBOL(atafb_mfb_fillrect);
 112 EXPORT_SYMBOL(atafb_mfb_linefill);