/* *  linux/drivers/video/console/bitblit.c -- BitBlitting Operation * *  Originally from the 'accel_*' routines in drivers/video/console/fbcon.c * *      Copyright (C) 2004 Antonino Daplas <adaplas @pol.net> * *  This file is subject to the terms and conditions of the GNU General Public *  License.  See the file COPYING in the main directory of this archive for *  more details. */ #include <linux/module.h>#include <linux/slab.h>#include <linux/string.h>#include <linux/fb.h>#include <linux/vt_kern.h>#include <linux/console.h>#include <asm/types.h>#include "fbcon.h" /* * Accelerated handlers. */static void update_attr(u8 *dst, u8 *src, int attribute,			       struct vc_data *vc){	int i, offset = (vc->vc_font.height < 10) ? 1 : 2;	int width = DIV_ROUND_UP(vc->vc_font.width, 8);	unsigned int cellsize = vc->vc_font.height * width;	u8 c; 	offset = cellsize - (offset * width);	for (i = 0; i < cellsize; i++) {		c = src[i];		if (attribute & FBCON_ATTRIBUTE_UNDERLINE && i >= offset)			c = 0xff;		if (attribute & FBCON_ATTRIBUTE_BOLD)			c |= c >> 1;		if (attribute & FBCON_ATTRIBUTE_REVERSE)			c = ~c;		dst[i] = c;	}} static void bit_bmove(struct vc_data *vc, struct fb_info *info, int sy,		      int sx, int dy, int dx, int height, int width){	struct fb_copyarea area; 	area.sx = sx * vc->vc_font.width;	area.sy = sy * vc->vc_font.height;	area.dx = dx * vc->vc_font.width;	area.dy = dy * vc->vc_font.height;	area.height = height * vc->vc_font.height;	area.width = width * vc->vc_font.width; 	info->fbops->fb_copyarea(info, &area);} static void bit_clear(struct vc_data *vc, struct fb_info *info, int sy,		      int sx, int height, int width){	int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;	struct fb_fillrect region; 	region.color = attr_bgcol_ec(bgshift, vc, info);	region.dx = sx * vc->vc_font.width;	region.dy = sy * vc->vc_font.height;	region.width = width * vc->vc_font.width;	region.height = height * vc->vc_font.height;	region.rop = ROP_COPY; 	info->fbops->fb_fillrect(info, &region);} static inline void bit_putcs_aligned(struct vc_data *vc, struct fb_info *info,				     const u16 *s, u32 attr, u32 cnt,				     u32 d_pitch, u32 s_pitch, u32 cellsize,				     struct fb_image *image, u8 *buf, u8 *dst){	u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;	u32 idx = vc->vc_font.width >> 3;	u8 *src; 	while (cnt--) {		src = vc->vc_font.data + (scr_readw(s++)&					  charmask)*cellsize; 		if (attr) {			update_attr(buf, src, attr, vc);			src = buf;		} 		if (likely(idx == 1))			__fb_pad_aligned_buffer(dst, d_pitch, src, idx,						image->height);		else			fb_pad_aligned_buffer(dst, d_pitch, src, idx,					      image->height); 		dst += s_pitch;	} 	info->fbops->fb_imageblit(info, image);} static inline void bit_putcs_unaligned(struct vc_data *vc,				       struct fb_info *info, const u16 *s,				       u32 attr, u32 cnt, u32 d_pitch,				       u32 s_pitch, u32 cellsize,				       struct fb_image *image, u8 *buf,				       u8 *dst){	u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;	u32 shift_low = 0, mod = vc->vc_font.width % 8;	u32 shift_high = 8;	u32 idx = vc->vc_font.width >> 3;	u8 *src; 	while (cnt--) {		src = vc->vc_font.data + (scr_readw(s++)&					  charmask)*cellsize; 		if (attr) {			update_attr(buf, src, attr, vc);			src = buf;		} 		fb_pad_unaligned_buffer(dst, d_pitch, src, idx,					image->height, shift_high,					shift_low, mod);		shift_low += mod;		dst += (shift_low >= 8) ? s_pitch : s_pitch - 1;		shift_low &= 7;		shift_high = 8 - shift_low;	} 	info->fbops->fb_imageblit(info, image); } static void bit_putcs(struct vc_data *vc, struct fb_info *info,		      const unsigned short *s, int count, int yy, int xx,		      int fg, int bg){	struct fb_image image;	u32 width = DIV_ROUND_UP(vc->vc_font.width, 8);	u32 cellsize = width * vc->vc_font.height;	u32 maxcnt = info->pixmap.size/cellsize;	u32 scan_align = info->pixmap.scan_align - 1;	u32 buf_align = info->pixmap.buf_align - 1;	u32 mod = vc->vc_font.width % 8, cnt, pitch, size;	u32 attribute = get_attribute(info, scr_readw(s));	u8 *dst, *buf = NULL; 	image.fg_color = fg;	image.bg_color = bg;	image.dx = xx * vc->vc_font.width;	image.dy = yy * vc->vc_font.height;	image.height = vc->vc_font.height;	image.depth = 1; 	if (attribute) {		buf = kmalloc(cellsize, GFP_ATOMIC);		if (!buf)			return;	} 	while (count) {		if (count > maxcnt)			cnt = maxcnt;		else			cnt = count; 		image.width = vc->vc_font.width * cnt;		pitch = DIV_ROUND_UP(image.width, 8) + scan_align;		pitch &= ~scan_align;		size = pitch * image.height + buf_align;		size &= ~buf_align;		dst = fb_get_buffer_offset(info, &info->pixmap, size);		image.data = dst; 		if (!mod)			bit_putcs_aligned(vc, info, s, attribute, cnt, pitch,					  width, cellsize, &image, buf, dst);		else			bit_putcs_unaligned(vc, info, s, attribute, cnt,					    pitch, width, cellsize, &image,					    buf, dst); 		image.dx += cnt * vc->vc_font.width;		count -= cnt;		s += cnt;	} 	/* buf is always NULL except when in monochrome mode, so in this case	   it's a gain to check buf against NULL even though kfree() handles	   NULL pointers just fine */	if (unlikely(buf))		kfree(buf); } static void bit_clear_margins(struct vc_data *vc, struct fb_info *info,			      int color, int bottom_only){	unsigned int cw = vc->vc_font.width;	unsigned int ch = vc->vc_font.height;	unsigned int rw = info->var.xres - (vc->vc_cols*cw);	unsigned int bh = info->var.yres - (vc->vc_rows*ch);	unsigned int rs = info->var.xres - rw;	unsigned int bs = info->var.yres - bh;	struct fb_fillrect region; 	region.color = color;	region.rop = ROP_COPY; 	if ((int) rw > 0 && !bottom_only) {		region.dx = info->var.xoffset + rs;		region.dy = 0;		region.width = rw;		region.height = info->var.yres_virtual;		info->fbops->fb_fillrect(info, &region);	} 	if ((int) bh > 0) {		region.dx = info->var.xoffset;		region.dy = info->var.yoffset + bs;		region.width = rs;		region.height = bh;		info->fbops->fb_fillrect(info, &region);	}} static void bit_cursor(struct vc_data *vc, struct fb_info *info, bool enable,		       int fg, int bg){	struct fb_cursor cursor;	struct fbcon_ops *ops = info->fbcon_par;	unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;	int w = DIV_ROUND_UP(vc->vc_font.width, 8), c;	int y = real_y(ops->p, vc->state.y);	int attribute, use_sw = vc->vc_cursor_type & CUR_SW;	int err = 1;	char *src; 	cursor.set = 0; 	if (!vc->vc_font.data)		return;  	c = scr_readw((u16 *) vc->vc_pos);	attribute = get_attribute(info, c);	src = vc->vc_font.data + ((c & charmask) * (w * vc->vc_font.height)); 	if (ops->cursor_state.image.data != src ||	    ops->cursor_reset) {	    ops->cursor_state.image.data = src;	    cursor.set |= FB_CUR_SETIMAGE;	} 	if (attribute) {		u8 *dst; 		dst = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC);		if (!dst)			return;		kfree(ops->cursor_data);		ops->cursor_data = dst;		update_attr(dst, src, attribute, vc);		src = dst;	} 	if (ops->cursor_state.image.fg_color != fg ||	    ops->cursor_state.image.bg_color != bg ||	    ops->cursor_reset) {		ops->cursor_state.image.fg_color = fg;		ops->cursor_state.image.bg_color = bg;		cursor.set |= FB_CUR_SETCMAP;	} 	if ((ops->cursor_state.image.dx != (vc->vc_font.width * vc->state.x)) ||	    (ops->cursor_state.image.dy != (vc->vc_font.height * y)) ||	    ops->cursor_reset) {		ops->cursor_state.image.dx = vc->vc_font.width * vc->state.x;		ops->cursor_state.image.dy = vc->vc_font.height * y;		cursor.set |= FB_CUR_SETPOS;	} 	if (ops->cursor_state.image.height != vc->vc_font.height ||	    ops->cursor_state.image.width != vc->vc_font.width ||	    ops->cursor_reset) {		ops->cursor_state.image.height = vc->vc_font.height;		ops->cursor_state.image.width = vc->vc_font.width;		cursor.set |= FB_CUR_SETSIZE;	} 	if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||	    ops->cursor_reset) {		ops->cursor_state.hot.x = cursor.hot.y = 0;		cursor.set |= FB_CUR_SETHOT;	} 	if (cursor.set & FB_CUR_SETSIZE ||	    vc->vc_cursor_type != ops->p->cursor_shape ||	    ops->cursor_state.mask == NULL ||	    ops->cursor_reset) {		char *mask = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC);		int cur_height, size, i = 0;		u8 msk = 0xff; 		if (!mask)			return; 		kfree(ops->cursor_state.mask);		ops->cursor_state.mask = mask; 		ops->p->cursor_shape = vc->vc_cursor_type;		cursor.set |= FB_CUR_SETSHAPE; 		switch (CUR_SIZE(ops->p->cursor_shape)) {		case CUR_NONE:			cur_height = 0;			break;		case CUR_UNDERLINE:			cur_height = (vc->vc_font.height < 10) ? 1 : 2;			break;		case CUR_LOWER_THIRD:			cur_height = vc->vc_font.height/3;			break;		case CUR_LOWER_HALF:			cur_height = vc->vc_font.height >> 1;			break;		case CUR_TWO_THIRDS:			cur_height = (vc->vc_font.height << 1)/3;			break;		case CUR_BLOCK:		default:			cur_height = vc->vc_font.height;			break;		}		size = (vc->vc_font.height - cur_height) * w;		while (size--)			mask[i++] = ~msk;		size = cur_height * w;		while (size--)			mask[i++] = msk;	} 	ops->cursor_state.enable = enable && !use_sw; 	cursor.image.data = src;	cursor.image.fg_color = ops->cursor_state.image.fg_color;	cursor.image.bg_color = ops->cursor_state.image.bg_color;	cursor.image.dx = ops->cursor_state.image.dx;	cursor.image.dy = ops->cursor_state.image.dy;	cursor.image.height = ops->cursor_state.image.height;	cursor.image.width = ops->cursor_state.image.width;	cursor.hot.x = ops->cursor_state.hot.x;	cursor.hot.y = ops->cursor_state.hot.y;	cursor.mask = ops->cursor_state.mask;	cursor.enable = ops->cursor_state.enable;	cursor.image.depth = 1;	cursor.rop = ROP_XOR; 	if (info->fbops->fb_cursor)		err = info->fbops->fb_cursor(info, &cursor); 	if (err)		soft_cursor(info, &cursor); 	ops->cursor_reset = 0;} static int bit_update_start(struct fb_info *info){	struct fbcon_ops *ops = info->fbcon_par;	int err; 	err = fb_pan_display(info, &ops->var);	ops->var.xoffset = info->var.xoffset;	ops->var.yoffset = info->var.yoffset;	ops->var.vmode = info->var.vmode;	return err;} void fbcon_set_bitops(struct fbcon_ops *ops){	ops->bmove = bit_bmove;	ops->clear = bit_clear;	ops->putcs = bit_putcs;	ops->clear_margins = bit_clear_margins;	ops->cursor = bit_cursor;	ops->update_start = bit_update_start;	ops->rotate_font = NULL; 	if (ops->rotate)		fbcon_set_rotate(ops);}