| /* |
| * 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/config.h> |
| #include <linux/module.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. |
| */ |
| #define FBCON_ATTRIBUTE_UNDERLINE 1 |
| #define FBCON_ATTRIBUTE_REVERSE 2 |
| #define FBCON_ATTRIBUTE_BOLD 4 |
| |
| static inline int real_y(struct display *p, int ypos) |
| { |
| int rows = p->vrows; |
| |
| ypos += p->yscroll; |
| return ypos < rows ? ypos : ypos - rows; |
| } |
| |
| |
| static inline int get_attribute(struct fb_info *info, u16 c) |
| { |
| int attribute = 0; |
| |
| if (fb_get_color_depth(&info->var) == 1) { |
| if (attr_underline(c)) |
| attribute |= FBCON_ATTRIBUTE_UNDERLINE; |
| if (attr_reverse(c)) |
| attribute |= FBCON_ATTRIBUTE_REVERSE; |
| if (attr_bold(c)) |
| attribute |= FBCON_ATTRIBUTE_BOLD; |
| } |
| |
| return attribute; |
| } |
| |
| static inline 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 = (vc->vc_font.width + 7) >> 3; |
| 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); |
| 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, ®ion); |
| } |
| |
| 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) |
| { |
| unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff; |
| unsigned int width = (vc->vc_font.width + 7) >> 3; |
| unsigned int cellsize = vc->vc_font.height * width; |
| unsigned int maxcnt = info->pixmap.size/cellsize; |
| unsigned int scan_align = info->pixmap.scan_align - 1; |
| unsigned int buf_align = info->pixmap.buf_align - 1; |
| unsigned int shift_low = 0, mod = vc->vc_font.width % 8; |
| unsigned int shift_high = 8, pitch, cnt, size, k; |
| unsigned int idx = vc->vc_font.width >> 3; |
| unsigned int attribute = get_attribute(info, scr_readw(s)); |
| struct fb_image image; |
| u8 *src, *dst, *buf = NULL; |
| |
| if (attribute) { |
| buf = kmalloc(cellsize, GFP_KERNEL); |
| if (!buf) |
| return; |
| } |
| |
| 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; |
| |
| while (count) { |
| if (count > maxcnt) |
| cnt = k = maxcnt; |
| else |
| cnt = k = count; |
| |
| image.width = vc->vc_font.width * cnt; |
| pitch = ((image.width + 7) >> 3) + 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) { |
| while (k--) { |
| src = vc->vc_font.data + (scr_readw(s++)& |
| charmask)*cellsize; |
| |
| if (attribute) { |
| update_attr(buf, src, attribute, vc); |
| src = buf; |
| } |
| |
| fb_sysmove_buf_unaligned(info, &info->pixmap, dst, pitch, |
| src, idx, image.height, |
| shift_high, shift_low, mod); |
| shift_low += mod; |
| dst += (shift_low >= 8) ? width : width - 1; |
| shift_low &= 7; |
| shift_high = 8 - shift_low; |
| } |
| } else { |
| while (k--) { |
| src = vc->vc_font.data + (scr_readw(s++)& |
| charmask)*cellsize; |
| |
| if (attribute) { |
| update_attr(buf, src, attribute, vc); |
| src = buf; |
| } |
| |
| fb_sysmove_buf_aligned(info, &info->pixmap, dst, pitch, |
| src, idx, image.height); |
| dst += width; |
| } |
| } |
| info->fbops->fb_imageblit(info, &image); |
| image.dx += cnt * vc->vc_font.width; |
| count -= 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 bottom_only) |
| { |
| int bgshift = (vc->vc_hi_font_mask) ? 13 : 12; |
| 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 = attr_bgcol_ec(bgshift, vc); |
| region.rop = ROP_COPY; |
| |
| if (rw && !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, ®ion); |
| } |
| |
| if (bh) { |
| region.dx = info->var.xoffset; |
| region.dy = info->var.yoffset + bs; |
| region.width = rs; |
| region.height = bh; |
| info->fbops->fb_fillrect(info, ®ion); |
| } |
| } |
| |
| static void bit_cursor(struct vc_data *vc, struct fb_info *info, |
| struct display *p, int mode, int softback_lines, int fg, int bg) |
| { |
| struct fb_cursor cursor; |
| struct fbcon_ops *ops = (struct fbcon_ops *) info->fbcon_par; |
| unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff; |
| int w = (vc->vc_font.width + 7) >> 3, c; |
| int y = real_y(p, vc->vc_y); |
| int attribute, use_sw = (vc->vc_cursor_type & 0x10); |
| char *src; |
| |
| cursor.set = 0; |
| |
| if (softback_lines) { |
| if (y + softback_lines >= vc->vc_rows) { |
| mode = CM_ERASE; |
| ops->cursor_flash = 0; |
| return; |
| } else |
| y += softback_lines; |
| } |
| |
| 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(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->vc_x)) || |
| (ops->cursor_state.image.dy != (vc->vc_font.height * y)) || |
| ops->cursor_reset) { |
| ops->cursor_state.image.dx = vc->vc_font.width * vc->vc_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 != p->cursor_shape || |
| ops->cursor_state.mask == NULL || |
| ops->cursor_reset) { |
| char *mask = kmalloc(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; |
| |
| p->cursor_shape = vc->vc_cursor_type; |
| cursor.set |= FB_CUR_SETSHAPE; |
| |
| switch (p->cursor_shape & CUR_HWMASK) { |
| 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; |
| } |
| |
| switch (mode) { |
| case CM_ERASE: |
| ops->cursor_state.enable = 0; |
| break; |
| case CM_DRAW: |
| case CM_MOVE: |
| default: |
| ops->cursor_state.enable = (use_sw) ? 0 : 1; |
| break; |
| } |
| |
| 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; |
| |
| info->fbops->fb_cursor(info, &cursor); |
| |
| ops->cursor_reset = 0; |
| } |
| |
| 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; |
| } |
| |
| EXPORT_SYMBOL(fbcon_set_bitops); |
| |
| MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>"); |
| MODULE_DESCRIPTION("Bit Blitting Operation"); |
| MODULE_LICENSE("GPL"); |
| |