diff options
Diffstat (limited to 'drivers/video/console/bitblit.c')
| -rw-r--r-- | drivers/video/console/bitblit.c | 405 |
1 files changed, 405 insertions, 0 deletions
diff --git a/drivers/video/console/bitblit.c b/drivers/video/console/bitblit.c new file mode 100644 index 00000000000..b28a4b0e395 --- /dev/null +++ b/drivers/video/console/bitblit.c @@ -0,0 +1,405 @@ +/* + * 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) +{ + void (*move_unaligned)(struct fb_info *info, struct fb_pixmap *buf, + u8 *dst, u32 d_pitch, u8 *src, u32 idx, + u32 height, u32 shift_high, u32 shift_low, + u32 mod); + void (*move_aligned)(struct fb_info *info, struct fb_pixmap *buf, + u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, + u32 height); + 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; + + if (info->pixmap.outbuf && info->pixmap.inbuf) { + move_aligned = fb_iomove_buf_aligned; + move_unaligned = fb_iomove_buf_unaligned; + } else { + move_aligned = fb_sysmove_buf_aligned; + move_unaligned = fb_sysmove_buf_unaligned; + } + 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; + } + + move_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; + } + + move_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"); + |