1 /* 2 * linux/drivers/video/console/fbcon_ccw.c -- Software Rotation - 270 degrees 3 * 4 * Copyright (C) 2005 Antonino Daplas <adaplas @pol.net> 5 * 6 * This file is subject to the terms and conditions of the GNU General Public 7 * License. See the file COPYING in the main directory of this archive for 8 * more details. 9 */ 10 11 #include <linux/module.h> 12 #include <linux/slab.h> 13 #include <linux/string.h> 14 #include <linux/fb.h> 15 #include <linux/vt_kern.h> 16 #include <linux/console.h> 17 #include <asm/types.h> 18 #include "fbcon.h" 19 #include "fbcon_rotate.h" 20 21 /* 22 * Rotation 270 degrees 23 */ 24 25 static void ccw_update_attr(u8 *dst, u8 *src, int attribute, 26 struct vc_data *vc) 27 { 28 int i, j, offset = (vc->vc_font.height < 10) ? 1 : 2; 29 int width = (vc->vc_font.height + 7) >> 3; 30 int mod = vc->vc_font.height % 8; 31 u8 c, msk = ~(0xff << offset), msk1 = 0; 32 33 if (mod) 34 msk <<= (8 - mod); 35 36 if (offset > mod) 37 msk1 |= 0x01; 38 39 for (i = 0; i < vc->vc_font.width; i++) { 40 for (j = 0; j < width; j++) { 41 c = *src; 42 43 if (attribute & FBCON_ATTRIBUTE_UNDERLINE) { 44 if (j == width - 1) 45 c |= msk; 46 47 if (msk1 && j == width - 2) 48 c |= msk1; 49 } 50 51 if (attribute & FBCON_ATTRIBUTE_BOLD && i) 52 *(dst - width) |= c; 53 54 if (attribute & FBCON_ATTRIBUTE_REVERSE) 55 c = ~c; 56 src++; 57 *dst++ = c; 58 } 59 } 60 } 61 62 63 static void ccw_bmove(struct vc_data *vc, struct fb_info *info, int sy, 64 int sx, int dy, int dx, int height, int width) 65 { 66 struct fbcon_ops *ops = info->fbcon_par; 67 struct fb_copyarea area; 68 u32 vyres = GETVYRES(ops->p->scrollmode, info); 69 70 area.sx = sy * vc->vc_font.height; 71 area.sy = vyres - ((sx + width) * vc->vc_font.width); 72 area.dx = dy * vc->vc_font.height; 73 area.dy = vyres - ((dx + width) * vc->vc_font.width); 74 area.width = height * vc->vc_font.height; 75 area.height = width * vc->vc_font.width; 76 77 info->fbops->fb_copyarea(info, &area); 78 } 79 80 static void ccw_clear(struct vc_data *vc, struct fb_info *info, int sy, 81 int sx, int height, int width) 82 { 83 struct fbcon_ops *ops = info->fbcon_par; 84 struct fb_fillrect region; 85 int bgshift = (vc->vc_hi_font_mask) ? 13 : 12; 86 u32 vyres = GETVYRES(ops->p->scrollmode, info); 87 88 region.color = attr_bgcol_ec(bgshift,vc,info); 89 region.dx = sy * vc->vc_font.height; 90 region.dy = vyres - ((sx + width) * vc->vc_font.width); 91 region.height = width * vc->vc_font.width; 92 region.width = height * vc->vc_font.height; 93 region.rop = ROP_COPY; 94 95 info->fbops->fb_fillrect(info, ®ion); 96 } 97 98 static inline void ccw_putcs_aligned(struct vc_data *vc, struct fb_info *info, 99 const u16 *s, u32 attr, u32 cnt, 100 u32 d_pitch, u32 s_pitch, u32 cellsize, 101 struct fb_image *image, u8 *buf, u8 *dst) 102 { 103 struct fbcon_ops *ops = info->fbcon_par; 104 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff; 105 u32 idx = (vc->vc_font.height + 7) >> 3; 106 u8 *src; 107 108 while (cnt--) { 109 src = ops->fontbuffer + (scr_readw(s--) & charmask)*cellsize; 110 111 if (attr) { 112 ccw_update_attr(buf, src, attr, vc); 113 src = buf; 114 } 115 116 if (likely(idx == 1)) 117 __fb_pad_aligned_buffer(dst, d_pitch, src, idx, 118 vc->vc_font.width); 119 else 120 fb_pad_aligned_buffer(dst, d_pitch, src, idx, 121 vc->vc_font.width); 122 123 dst += d_pitch * vc->vc_font.width; 124 } 125 126 info->fbops->fb_imageblit(info, image); 127 } 128 129 static void ccw_putcs(struct vc_data *vc, struct fb_info *info, 130 const unsigned short *s, int count, int yy, int xx, 131 int fg, int bg) 132 { 133 struct fb_image image; 134 struct fbcon_ops *ops = info->fbcon_par; 135 u32 width = (vc->vc_font.height + 7)/8; 136 u32 cellsize = width * vc->vc_font.width; 137 u32 maxcnt = info->pixmap.size/cellsize; 138 u32 scan_align = info->pixmap.scan_align - 1; 139 u32 buf_align = info->pixmap.buf_align - 1; 140 u32 cnt, pitch, size; 141 u32 attribute = get_attribute(info, scr_readw(s)); 142 u8 *dst, *buf = NULL; 143 u32 vyres = GETVYRES(ops->p->scrollmode, info); 144 145 if (!ops->fontbuffer) 146 return; 147 148 image.fg_color = fg; 149 image.bg_color = bg; 150 image.dx = yy * vc->vc_font.height; 151 image.dy = vyres - ((xx + count) * vc->vc_font.width); 152 image.width = vc->vc_font.height; 153 image.depth = 1; 154 155 if (attribute) { 156 buf = kmalloc(cellsize, GFP_KERNEL); 157 if (!buf) 158 return; 159 } 160 161 s += count - 1; 162 163 while (count) { 164 if (count > maxcnt) 165 cnt = maxcnt; 166 else 167 cnt = count; 168 169 image.height = vc->vc_font.width * cnt; 170 pitch = ((image.width + 7) >> 3) + scan_align; 171 pitch &= ~scan_align; 172 size = pitch * image.height + buf_align; 173 size &= ~buf_align; 174 dst = fb_get_buffer_offset(info, &info->pixmap, size); 175 image.data = dst; 176 ccw_putcs_aligned(vc, info, s, attribute, cnt, pitch, 177 width, cellsize, &image, buf, dst); 178 image.dy += image.height; 179 count -= cnt; 180 s -= cnt; 181 } 182 183 /* buf is always NULL except when in monochrome mode, so in this case 184 it's a gain to check buf against NULL even though kfree() handles 185 NULL pointers just fine */ 186 if (unlikely(buf)) 187 kfree(buf); 188 189 } 190 191 static void ccw_clear_margins(struct vc_data *vc, struct fb_info *info, 192 int color, int bottom_only) 193 { 194 unsigned int cw = vc->vc_font.width; 195 unsigned int ch = vc->vc_font.height; 196 unsigned int rw = info->var.yres - (vc->vc_cols*cw); 197 unsigned int bh = info->var.xres - (vc->vc_rows*ch); 198 unsigned int bs = vc->vc_rows*ch; 199 struct fb_fillrect region; 200 201 region.color = color; 202 region.rop = ROP_COPY; 203 204 if ((int) rw > 0 && !bottom_only) { 205 region.dx = 0; 206 region.dy = info->var.yoffset; 207 region.height = rw; 208 region.width = info->var.xres_virtual; 209 info->fbops->fb_fillrect(info, ®ion); 210 } 211 212 if ((int) bh > 0) { 213 region.dx = info->var.xoffset + bs; 214 region.dy = 0; 215 region.height = info->var.yres_virtual; 216 region.width = bh; 217 info->fbops->fb_fillrect(info, ®ion); 218 } 219 } 220 221 static void ccw_cursor(struct vc_data *vc, struct fb_info *info, int mode, 222 int softback_lines, int fg, int bg) 223 { 224 struct fb_cursor cursor; 225 struct fbcon_ops *ops = info->fbcon_par; 226 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff; 227 int w = (vc->vc_font.height + 7) >> 3, c; 228 int y = real_y(ops->p, vc->state.y); 229 int attribute, use_sw = vc->vc_cursor_type & CUR_SW; 230 int err = 1, dx, dy; 231 char *src; 232 u32 vyres = GETVYRES(ops->p->scrollmode, info); 233 234 if (!ops->fontbuffer) 235 return; 236 237 cursor.set = 0; 238 239 if (softback_lines) { 240 if (y + softback_lines >= vc->vc_rows) { 241 mode = CM_ERASE; 242 ops->cursor_flash = 0; 243 return; 244 } else 245 y += softback_lines; 246 } 247 248 c = scr_readw((u16 *) vc->vc_pos); 249 attribute = get_attribute(info, c); 250 src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.width)); 251 252 if (ops->cursor_state.image.data != src || 253 ops->cursor_reset) { 254 ops->cursor_state.image.data = src; 255 cursor.set |= FB_CUR_SETIMAGE; 256 } 257 258 if (attribute) { 259 u8 *dst; 260 261 dst = kmalloc_array(w, vc->vc_font.width, GFP_ATOMIC); 262 if (!dst) 263 return; 264 kfree(ops->cursor_data); 265 ops->cursor_data = dst; 266 ccw_update_attr(dst, src, attribute, vc); 267 src = dst; 268 } 269 270 if (ops->cursor_state.image.fg_color != fg || 271 ops->cursor_state.image.bg_color != bg || 272 ops->cursor_reset) { 273 ops->cursor_state.image.fg_color = fg; 274 ops->cursor_state.image.bg_color = bg; 275 cursor.set |= FB_CUR_SETCMAP; 276 } 277 278 if (ops->cursor_state.image.height != vc->vc_font.width || 279 ops->cursor_state.image.width != vc->vc_font.height || 280 ops->cursor_reset) { 281 ops->cursor_state.image.height = vc->vc_font.width; 282 ops->cursor_state.image.width = vc->vc_font.height; 283 cursor.set |= FB_CUR_SETSIZE; 284 } 285 286 dx = y * vc->vc_font.height; 287 dy = vyres - ((vc->state.x + 1) * vc->vc_font.width); 288 289 if (ops->cursor_state.image.dx != dx || 290 ops->cursor_state.image.dy != dy || 291 ops->cursor_reset) { 292 ops->cursor_state.image.dx = dx; 293 ops->cursor_state.image.dy = dy; 294 cursor.set |= FB_CUR_SETPOS; 295 } 296 297 if (ops->cursor_state.hot.x || ops->cursor_state.hot.y || 298 ops->cursor_reset) { 299 ops->cursor_state.hot.x = cursor.hot.y = 0; 300 cursor.set |= FB_CUR_SETHOT; 301 } 302 303 if (cursor.set & FB_CUR_SETSIZE || 304 vc->vc_cursor_type != ops->p->cursor_shape || 305 ops->cursor_state.mask == NULL || 306 ops->cursor_reset) { 307 char *tmp, *mask = kmalloc_array(w, vc->vc_font.width, 308 GFP_ATOMIC); 309 int cur_height, size, i = 0; 310 int width = (vc->vc_font.width + 7)/8; 311 312 if (!mask) 313 return; 314 315 tmp = kmalloc_array(width, vc->vc_font.height, GFP_ATOMIC); 316 317 if (!tmp) { 318 kfree(mask); 319 return; 320 } 321 322 kfree(ops->cursor_state.mask); 323 ops->cursor_state.mask = mask; 324 325 ops->p->cursor_shape = vc->vc_cursor_type; 326 cursor.set |= FB_CUR_SETSHAPE; 327 328 switch (CUR_SIZE(ops->p->cursor_shape)) { 329 case CUR_NONE: 330 cur_height = 0; 331 break; 332 case CUR_UNDERLINE: 333 cur_height = (vc->vc_font.height < 10) ? 1 : 2; 334 break; 335 case CUR_LOWER_THIRD: 336 cur_height = vc->vc_font.height/3; 337 break; 338 case CUR_LOWER_HALF: 339 cur_height = vc->vc_font.height >> 1; 340 break; 341 case CUR_TWO_THIRDS: 342 cur_height = (vc->vc_font.height << 1)/3; 343 break; 344 case CUR_BLOCK: 345 default: 346 cur_height = vc->vc_font.height; 347 break; 348 } 349 350 size = (vc->vc_font.height - cur_height) * width; 351 while (size--) 352 tmp[i++] = 0; 353 size = cur_height * width; 354 while (size--) 355 tmp[i++] = 0xff; 356 memset(mask, 0, w * vc->vc_font.width); 357 rotate_ccw(tmp, mask, vc->vc_font.width, vc->vc_font.height); 358 kfree(tmp); 359 } 360 361 switch (mode) { 362 case CM_ERASE: 363 ops->cursor_state.enable = 0; 364 break; 365 case CM_DRAW: 366 case CM_MOVE: 367 default: 368 ops->cursor_state.enable = (use_sw) ? 0 : 1; 369 break; 370 } 371 372 cursor.image.data = src; 373 cursor.image.fg_color = ops->cursor_state.image.fg_color; 374 cursor.image.bg_color = ops->cursor_state.image.bg_color; 375 cursor.image.dx = ops->cursor_state.image.dx; 376 cursor.image.dy = ops->cursor_state.image.dy; 377 cursor.image.height = ops->cursor_state.image.height; 378 cursor.image.width = ops->cursor_state.image.width; 379 cursor.hot.x = ops->cursor_state.hot.x; 380 cursor.hot.y = ops->cursor_state.hot.y; 381 cursor.mask = ops->cursor_state.mask; 382 cursor.enable = ops->cursor_state.enable; 383 cursor.image.depth = 1; 384 cursor.rop = ROP_XOR; 385 386 if (info->fbops->fb_cursor) 387 err = info->fbops->fb_cursor(info, &cursor); 388 389 if (err) 390 soft_cursor(info, &cursor); 391 392 ops->cursor_reset = 0; 393 } 394 395 static int ccw_update_start(struct fb_info *info) 396 { 397 struct fbcon_ops *ops = info->fbcon_par; 398 u32 yoffset; 399 u32 vyres = GETVYRES(ops->p->scrollmode, info); 400 int err; 401 402 yoffset = (vyres - info->var.yres) - ops->var.xoffset; 403 ops->var.xoffset = ops->var.yoffset; 404 ops->var.yoffset = yoffset; 405 err = fb_pan_display(info, &ops->var); 406 ops->var.xoffset = info->var.xoffset; 407 ops->var.yoffset = info->var.yoffset; 408 ops->var.vmode = info->var.vmode; 409 return err; 410 } 411 412 void fbcon_rotate_ccw(struct fbcon_ops *ops) 413 { 414 ops->bmove = ccw_bmove; 415 ops->clear = ccw_clear; 416 ops->putcs = ccw_putcs; 417 ops->clear_margins = ccw_clear_margins; 418 ops->cursor = ccw_cursor; 419 ops->update_start = ccw_update_start; 420 } 421 EXPORT_SYMBOL(fbcon_rotate_ccw); 422