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1/*2 * linux/drivers/video/console/bitblit.c -- BitBlitting Operation3 *4 * Originally from the 'accel_*' routines in drivers/video/console/fbcon.c5 *6 * Copyright (C) 2004 Antonino Daplas <adaplas @pol.net>7 *8 * This file is subject to the terms and conditions of the GNU General Public9 * License. See the file COPYING in the main directory of this archive for10 * more details.11 */12 13#include <linux/module.h>14#include <linux/slab.h>15#include <linux/string.h>16#include <linux/fb.h>17#include <linux/vt_kern.h>18#include <linux/console.h>19#include <asm/types.h>20#include "fbcon.h"21 22/*23 * Accelerated handlers.24 */25static void update_attr(u8 *dst, u8 *src, int attribute,26 struct vc_data *vc)27{28 int i, offset = (vc->vc_font.height < 10) ? 1 : 2;29 int width = DIV_ROUND_UP(vc->vc_font.width, 8);30 unsigned int cellsize = vc->vc_font.height * width;31 u8 c;32 33 offset = cellsize - (offset * width);34 for (i = 0; i < cellsize; i++) {35 c = src[i];36 if (attribute & FBCON_ATTRIBUTE_UNDERLINE && i >= offset)37 c = 0xff;38 if (attribute & FBCON_ATTRIBUTE_BOLD)39 c |= c >> 1;40 if (attribute & FBCON_ATTRIBUTE_REVERSE)41 c = ~c;42 dst[i] = c;43 }44}45 46static void bit_bmove(struct vc_data *vc, struct fb_info *info, int sy,47 int sx, int dy, int dx, int height, int width)48{49 struct fb_copyarea area;50 51 area.sx = sx * vc->vc_font.width;52 area.sy = sy * vc->vc_font.height;53 area.dx = dx * vc->vc_font.width;54 area.dy = dy * vc->vc_font.height;55 area.height = height * vc->vc_font.height;56 area.width = width * vc->vc_font.width;57 58 info->fbops->fb_copyarea(info, &area);59}60 61static void bit_clear(struct vc_data *vc, struct fb_info *info, int sy,62 int sx, int height, int width)63{64 int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;65 struct fb_fillrect region;66 67 region.color = attr_bgcol_ec(bgshift, vc, info);68 region.dx = sx * vc->vc_font.width;69 region.dy = sy * vc->vc_font.height;70 region.width = width * vc->vc_font.width;71 region.height = height * vc->vc_font.height;72 region.rop = ROP_COPY;73 74 info->fbops->fb_fillrect(info, ®ion);75}76 77static inline void bit_putcs_aligned(struct vc_data *vc, struct fb_info *info,78 const u16 *s, u32 attr, u32 cnt,79 u32 d_pitch, u32 s_pitch, u32 cellsize,80 struct fb_image *image, u8 *buf, u8 *dst)81{82 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;83 u32 idx = vc->vc_font.width >> 3;84 u8 *src;85 86 while (cnt--) {87 src = vc->vc_font.data + (scr_readw(s++)&88 charmask)*cellsize;89 90 if (attr) {91 update_attr(buf, src, attr, vc);92 src = buf;93 }94 95 if (likely(idx == 1))96 __fb_pad_aligned_buffer(dst, d_pitch, src, idx,97 image->height);98 else99 fb_pad_aligned_buffer(dst, d_pitch, src, idx,100 image->height);101 102 dst += s_pitch;103 }104 105 info->fbops->fb_imageblit(info, image);106}107 108static inline void bit_putcs_unaligned(struct vc_data *vc,109 struct fb_info *info, const u16 *s,110 u32 attr, u32 cnt, u32 d_pitch,111 u32 s_pitch, u32 cellsize,112 struct fb_image *image, u8 *buf,113 u8 *dst)114{115 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;116 u32 shift_low = 0, mod = vc->vc_font.width % 8;117 u32 shift_high = 8;118 u32 idx = vc->vc_font.width >> 3;119 u8 *src;120 121 while (cnt--) {122 src = vc->vc_font.data + (scr_readw(s++)&123 charmask)*cellsize;124 125 if (attr) {126 update_attr(buf, src, attr, vc);127 src = buf;128 }129 130 fb_pad_unaligned_buffer(dst, d_pitch, src, idx,131 image->height, shift_high,132 shift_low, mod);133 shift_low += mod;134 dst += (shift_low >= 8) ? s_pitch : s_pitch - 1;135 shift_low &= 7;136 shift_high = 8 - shift_low;137 }138 139 info->fbops->fb_imageblit(info, image);140 141}142 143static void bit_putcs(struct vc_data *vc, struct fb_info *info,144 const unsigned short *s, int count, int yy, int xx,145 int fg, int bg)146{147 struct fb_image image;148 u32 width = DIV_ROUND_UP(vc->vc_font.width, 8);149 u32 cellsize = width * vc->vc_font.height;150 u32 maxcnt = info->pixmap.size/cellsize;151 u32 scan_align = info->pixmap.scan_align - 1;152 u32 buf_align = info->pixmap.buf_align - 1;153 u32 mod = vc->vc_font.width % 8, cnt, pitch, size;154 u32 attribute = get_attribute(info, scr_readw(s));155 u8 *dst, *buf = NULL;156 157 image.fg_color = fg;158 image.bg_color = bg;159 image.dx = xx * vc->vc_font.width;160 image.dy = yy * vc->vc_font.height;161 image.height = vc->vc_font.height;162 image.depth = 1;163 164 if (attribute) {165 buf = kmalloc(cellsize, GFP_ATOMIC);166 if (!buf)167 return;168 }169 170 while (count) {171 if (count > maxcnt)172 cnt = maxcnt;173 else174 cnt = count;175 176 image.width = vc->vc_font.width * cnt;177 pitch = DIV_ROUND_UP(image.width, 8) + scan_align;178 pitch &= ~scan_align;179 size = pitch * image.height + buf_align;180 size &= ~buf_align;181 dst = fb_get_buffer_offset(info, &info->pixmap, size);182 image.data = dst;183 184 if (!mod)185 bit_putcs_aligned(vc, info, s, attribute, cnt, pitch,186 width, cellsize, &image, buf, dst);187 else188 bit_putcs_unaligned(vc, info, s, attribute, cnt,189 pitch, width, cellsize, &image,190 buf, dst);191 192 image.dx += cnt * vc->vc_font.width;193 count -= cnt;194 s += cnt;195 }196 197 /* buf is always NULL except when in monochrome mode, so in this case198 it's a gain to check buf against NULL even though kfree() handles199 NULL pointers just fine */200 if (unlikely(buf))201 kfree(buf);202 203}204 205static void bit_clear_margins(struct vc_data *vc, struct fb_info *info,206 int color, int bottom_only)207{208 unsigned int cw = vc->vc_font.width;209 unsigned int ch = vc->vc_font.height;210 unsigned int rw = info->var.xres - (vc->vc_cols*cw);211 unsigned int bh = info->var.yres - (vc->vc_rows*ch);212 unsigned int rs = info->var.xres - rw;213 unsigned int bs = info->var.yres - bh;214 struct fb_fillrect region;215 216 region.color = color;217 region.rop = ROP_COPY;218 219 if ((int) rw > 0 && !bottom_only) {220 region.dx = info->var.xoffset + rs;221 region.dy = 0;222 region.width = rw;223 region.height = info->var.yres_virtual;224 info->fbops->fb_fillrect(info, ®ion);225 }226 227 if ((int) bh > 0) {228 region.dx = info->var.xoffset;229 region.dy = info->var.yoffset + bs;230 region.width = rs;231 region.height = bh;232 info->fbops->fb_fillrect(info, ®ion);233 }234}235 236static void bit_cursor(struct vc_data *vc, struct fb_info *info, bool enable,237 int fg, int bg)238{239 struct fb_cursor cursor;240 struct fbcon_ops *ops = info->fbcon_par;241 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;242 int w = DIV_ROUND_UP(vc->vc_font.width, 8), c;243 int y = real_y(ops->p, vc->state.y);244 int attribute, use_sw = vc->vc_cursor_type & CUR_SW;245 int err = 1;246 char *src;247 248 cursor.set = 0;249 250 if (!vc->vc_font.data)251 return;252 253 c = scr_readw((u16 *) vc->vc_pos);254 attribute = get_attribute(info, c);255 src = vc->vc_font.data + ((c & charmask) * (w * vc->vc_font.height));256 257 if (ops->cursor_state.image.data != src ||258 ops->cursor_reset) {259 ops->cursor_state.image.data = src;260 cursor.set |= FB_CUR_SETIMAGE;261 }262 263 if (attribute) {264 u8 *dst;265 266 dst = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC);267 if (!dst)268 return;269 kfree(ops->cursor_data);270 ops->cursor_data = dst;271 update_attr(dst, src, attribute, vc);272 src = dst;273 }274 275 if (ops->cursor_state.image.fg_color != fg ||276 ops->cursor_state.image.bg_color != bg ||277 ops->cursor_reset) {278 ops->cursor_state.image.fg_color = fg;279 ops->cursor_state.image.bg_color = bg;280 cursor.set |= FB_CUR_SETCMAP;281 }282 283 if ((ops->cursor_state.image.dx != (vc->vc_font.width * vc->state.x)) ||284 (ops->cursor_state.image.dy != (vc->vc_font.height * y)) ||285 ops->cursor_reset) {286 ops->cursor_state.image.dx = vc->vc_font.width * vc->state.x;287 ops->cursor_state.image.dy = vc->vc_font.height * y;288 cursor.set |= FB_CUR_SETPOS;289 }290 291 if (ops->cursor_state.image.height != vc->vc_font.height ||292 ops->cursor_state.image.width != vc->vc_font.width ||293 ops->cursor_reset) {294 ops->cursor_state.image.height = vc->vc_font.height;295 ops->cursor_state.image.width = vc->vc_font.width;296 cursor.set |= FB_CUR_SETSIZE;297 }298 299 if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||300 ops->cursor_reset) {301 ops->cursor_state.hot.x = cursor.hot.y = 0;302 cursor.set |= FB_CUR_SETHOT;303 }304 305 if (cursor.set & FB_CUR_SETSIZE ||306 vc->vc_cursor_type != ops->p->cursor_shape ||307 ops->cursor_state.mask == NULL ||308 ops->cursor_reset) {309 char *mask = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC);310 int cur_height, size, i = 0;311 u8 msk = 0xff;312 313 if (!mask)314 return;315 316 kfree(ops->cursor_state.mask);317 ops->cursor_state.mask = mask;318 319 ops->p->cursor_shape = vc->vc_cursor_type;320 cursor.set |= FB_CUR_SETSHAPE;321 322 switch (CUR_SIZE(ops->p->cursor_shape)) {323 case CUR_NONE:324 cur_height = 0;325 break;326 case CUR_UNDERLINE:327 cur_height = (vc->vc_font.height < 10) ? 1 : 2;328 break;329 case CUR_LOWER_THIRD:330 cur_height = vc->vc_font.height/3;331 break;332 case CUR_LOWER_HALF:333 cur_height = vc->vc_font.height >> 1;334 break;335 case CUR_TWO_THIRDS:336 cur_height = (vc->vc_font.height << 1)/3;337 break;338 case CUR_BLOCK:339 default:340 cur_height = vc->vc_font.height;341 break;342 }343 size = (vc->vc_font.height - cur_height) * w;344 while (size--)345 mask[i++] = ~msk;346 size = cur_height * w;347 while (size--)348 mask[i++] = msk;349 }350 351 ops->cursor_state.enable = enable && !use_sw;352 353 cursor.image.data = src;354 cursor.image.fg_color = ops->cursor_state.image.fg_color;355 cursor.image.bg_color = ops->cursor_state.image.bg_color;356 cursor.image.dx = ops->cursor_state.image.dx;357 cursor.image.dy = ops->cursor_state.image.dy;358 cursor.image.height = ops->cursor_state.image.height;359 cursor.image.width = ops->cursor_state.image.width;360 cursor.hot.x = ops->cursor_state.hot.x;361 cursor.hot.y = ops->cursor_state.hot.y;362 cursor.mask = ops->cursor_state.mask;363 cursor.enable = ops->cursor_state.enable;364 cursor.image.depth = 1;365 cursor.rop = ROP_XOR;366 367 if (info->fbops->fb_cursor)368 err = info->fbops->fb_cursor(info, &cursor);369 370 if (err)371 soft_cursor(info, &cursor);372 373 ops->cursor_reset = 0;374}375 376static int bit_update_start(struct fb_info *info)377{378 struct fbcon_ops *ops = info->fbcon_par;379 int err;380 381 err = fb_pan_display(info, &ops->var);382 ops->var.xoffset = info->var.xoffset;383 ops->var.yoffset = info->var.yoffset;384 ops->var.vmode = info->var.vmode;385 return err;386}387 388void fbcon_set_bitops(struct fbcon_ops *ops)389{390 ops->bmove = bit_bmove;391 ops->clear = bit_clear;392 ops->putcs = bit_putcs;393 ops->clear_margins = bit_clear_margins;394 ops->cursor = bit_cursor;395 ops->update_start = bit_update_start;396 ops->rotate_font = NULL;397 398 if (ops->rotate)399 fbcon_set_rotate(ops);400}401