forked from rrcarlosr/Jetpack
113 lines
2.5 KiB
C
113 lines
2.5 KiB
C
/*
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* linux/drivers/video/mfb.c -- Low level frame buffer operations for
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* monochrome
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*
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* Created 5 Apr 1997 by Geert Uytterhoeven
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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*/
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/fb.h>
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#include "atafb.h"
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#include "atafb_utils.h"
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/*
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* Monochrome
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*/
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void atafb_mfb_copyarea(struct fb_info *info, u_long next_line,
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int sy, int sx, int dy, int dx,
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int height, int width)
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{
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u8 *src, *dest;
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u_int rows;
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if (sx == 0 && dx == 0 && width == next_line) {
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src = (u8 *)info->screen_base + sy * (width >> 3);
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dest = (u8 *)info->screen_base + dy * (width >> 3);
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fb_memmove(dest, src, height * (width >> 3));
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} else if (dy <= sy) {
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src = (u8 *)info->screen_base + sy * next_line + (sx >> 3);
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dest = (u8 *)info->screen_base + dy * next_line + (dx >> 3);
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for (rows = height; rows--;) {
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fb_memmove(dest, src, width >> 3);
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src += next_line;
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dest += next_line;
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}
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} else {
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src = (u8 *)info->screen_base + (sy + height - 1) * next_line + (sx >> 3);
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dest = (u8 *)info->screen_base + (dy + height - 1) * next_line + (dx >> 3);
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for (rows = height; rows--;) {
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fb_memmove(dest, src, width >> 3);
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src -= next_line;
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dest -= next_line;
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}
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}
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}
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void atafb_mfb_fillrect(struct fb_info *info, u_long next_line, u32 color,
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int sy, int sx, int height, int width)
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{
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u8 *dest;
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u_int rows;
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dest = (u8 *)info->screen_base + sy * next_line + (sx >> 3);
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if (sx == 0 && width == next_line) {
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if (color)
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fb_memset255(dest, height * (width >> 3));
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else
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fb_memclear(dest, height * (width >> 3));
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} else {
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for (rows = height; rows--; dest += next_line) {
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if (color)
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fb_memset255(dest, width >> 3);
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else
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fb_memclear_small(dest, width >> 3);
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}
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}
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}
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void atafb_mfb_linefill(struct fb_info *info, u_long next_line,
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int dy, int dx, u32 width,
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const u8 *data, u32 bgcolor, u32 fgcolor)
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{
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u8 *dest;
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u_int rows;
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dest = (u8 *)info->screen_base + dy * next_line + (dx >> 3);
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for (rows = width / 8; rows--; /* check margins */ ) {
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// use fast_memmove or fb_memmove
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*dest++ = *data++;
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}
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}
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#ifdef MODULE
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MODULE_LICENSE("GPL");
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int init_module(void)
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{
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return 0;
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}
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void cleanup_module(void)
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{
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}
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#endif /* MODULE */
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/*
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* Visible symbols for modules
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*/
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EXPORT_SYMBOL(atafb_mfb_copyarea);
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EXPORT_SYMBOL(atafb_mfb_fillrect);
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EXPORT_SYMBOL(atafb_mfb_linefill);
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