1 /* 2 * linux/drivers/video/console/bitblit.c -- BitBlitting Operation 3 * 4 * Originally from the 'accel_*' routines in drivers/video/console/fbcon.c 5 * 6 * Copyright (C) 2004 Antonino Daplas <adaplas @pol.net> 7 * 8 * This file is subject to the terms and conditions of the GNU General Public 9 * License. See the file COPYING in the main directory of this archive for 10 * 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 */ 25 static 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 46 static void bit_clear(struct vc_data *vc, struct fb_info *info, int sy, 47 int sx, int height, int width) 48 { 49 int bgshift = (vc->vc_hi_font_mask) ? 13 : 12; 50 struct fb_fillrect region; 51 52 region.color = attr_bgcol_ec(bgshift, vc, info); 53 region.dx = sx * vc->vc_font.width; 54 region.dy = sy * vc->vc_font.height; 55 region.width = width * vc->vc_font.width; 56 region.height = height * vc->vc_font.height; 57 region.rop = ROP_COPY; 58 59 info->fbops->fb_fillrect(info, ®ion); 60 } 61 62 static inline void bit_putcs_aligned(struct vc_data *vc, struct fb_info *info, 63 const u16 *s, u32 attr, u32 cnt, 64 u32 d_pitch, u32 s_pitch, u32 cellsize, 65 struct fb_image *image, u8 *buf, u8 *dst) 66 { 67 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff; 68 u32 idx = vc->vc_font.width >> 3; 69 u8 *src; 70 71 while (cnt--) { 72 src = vc->vc_font.data + (scr_readw(s++)& 73 charmask)*cellsize; 74 75 if (attr) { 76 update_attr(buf, src, attr, vc); 77 src = buf; 78 } 79 80 if (likely(idx == 1)) 81 __fb_pad_aligned_buffer(dst, d_pitch, src, idx, 82 image->height); 83 else 84 fb_pad_aligned_buffer(dst, d_pitch, src, idx, 85 image->height); 86 87 dst += s_pitch; 88 } 89 90 info->fbops->fb_imageblit(info, image); 91 } 92 93 static inline void bit_putcs_unaligned(struct vc_data *vc, 94 struct fb_info *info, const u16 *s, 95 u32 attr, u32 cnt, u32 d_pitch, 96 u32 s_pitch, u32 cellsize, 97 struct fb_image *image, u8 *buf, 98 u8 *dst) 99 { 100 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff; 101 u32 shift_low = 0, mod = vc->vc_font.width % 8; 102 u32 shift_high = 8; 103 u32 idx = vc->vc_font.width >> 3; 104 u8 *src; 105 106 while (cnt--) { 107 src = vc->vc_font.data + (scr_readw(s++)& 108 charmask)*cellsize; 109 110 if (attr) { 111 update_attr(buf, src, attr, vc); 112 src = buf; 113 } 114 115 fb_pad_unaligned_buffer(dst, d_pitch, src, idx, 116 image->height, shift_high, 117 shift_low, mod); 118 shift_low += mod; 119 dst += (shift_low >= 8) ? s_pitch : s_pitch - 1; 120 shift_low &= 7; 121 shift_high = 8 - shift_low; 122 } 123 124 info->fbops->fb_imageblit(info, image); 125 126 } 127 128 static void bit_putcs(struct vc_data *vc, struct fb_info *info, 129 const unsigned short *s, int count, int yy, int xx, 130 int fg, int bg) 131 { 132 struct fb_image image; 133 u32 width = DIV_ROUND_UP(vc->vc_font.width, 8); 134 u32 cellsize = width * vc->vc_font.height; 135 u32 maxcnt = info->pixmap.size/cellsize; 136 u32 scan_align = info->pixmap.scan_align - 1; 137 u32 buf_align = info->pixmap.buf_align - 1; 138 u32 mod = vc->vc_font.width % 8, cnt, pitch, size; 139 u32 attribute = get_attribute(info, scr_readw(s)); 140 u8 *dst, *buf = NULL; 141 142 image.fg_color = fg; 143 image.bg_color = bg; 144 image.dx = xx * vc->vc_font.width; 145 image.dy = yy * vc->vc_font.height; 146 image.height = vc->vc_font.height; 147 image.depth = 1; 148 149 if (attribute) { 150 buf = kmalloc(cellsize, GFP_ATOMIC); 151 if (!buf) 152 return; 153 } 154 155 while (count) { 156 if (count > maxcnt) 157 cnt = maxcnt; 158 else 159 cnt = count; 160 161 image.width = vc->vc_font.width * cnt; 162 pitch = DIV_ROUND_UP(image.width, 8) + scan_align; 163 pitch &= ~scan_align; 164 size = pitch * image.height + buf_align; 165 size &= ~buf_align; 166 dst = fb_get_buffer_offset(info, &info->pixmap, size); 167 image.data = dst; 168 169 if (!mod) 170 bit_putcs_aligned(vc, info, s, attribute, cnt, pitch, 171 width, cellsize, &image, buf, dst); 172 else 173 bit_putcs_unaligned(vc, info, s, attribute, cnt, 174 pitch, width, cellsize, &image, 175 buf, dst); 176 177 image.dx += cnt * vc->vc_font.width; 178 count -= cnt; 179 s += cnt; 180 } 181 182 /* buf is always NULL except when in monochrome mode, so in this case 183 it's a gain to check buf against NULL even though kfree() handles 184 NULL pointers just fine */ 185 if (unlikely(buf)) 186 kfree(buf); 187 188 } 189 190 static void bit_clear_margins(struct vc_data *vc, struct fb_info *info, 191 int color, int bottom_only) 192 { 193 unsigned int cw = vc->vc_font.width; 194 unsigned int ch = vc->vc_font.height; 195 unsigned int rw = info->var.xres - (vc->vc_cols*cw); 196 unsigned int bh = info->var.yres - (vc->vc_rows*ch); 197 unsigned int rs = info->var.xres - rw; 198 unsigned int bs = info->var.yres - bh; 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 = info->var.xoffset + rs; 206 region.dy = 0; 207 region.width = rw; 208 region.height = info->var.yres_virtual; 209 info->fbops->fb_fillrect(info, ®ion); 210 } 211 212 if ((int) bh > 0) { 213 region.dx = info->var.xoffset; 214 region.dy = info->var.yoffset + bs; 215 region.width = rs; 216 region.height = bh; 217 info->fbops->fb_fillrect(info, ®ion); 218 } 219 } 220 221 static void bit_cursor(struct vc_data *vc, struct fb_info *info, int mode, 222 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 = DIV_ROUND_UP(vc->vc_font.width, 8), 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; 231 char *src; 232 233 cursor.set = 0; 234 235 c = scr_readw((u16 *) vc->vc_pos); 236 attribute = get_attribute(info, c); 237 src = vc->vc_font.data + ((c & charmask) * (w * vc->vc_font.height)); 238 239 if (ops->cursor_state.image.data != src || 240 ops->cursor_reset) { 241 ops->cursor_state.image.data = src; 242 cursor.set |= FB_CUR_SETIMAGE; 243 } 244 245 if (attribute) { 246 u8 *dst; 247 248 dst = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC); 249 if (!dst) 250 return; 251 kfree(ops->cursor_data); 252 ops->cursor_data = dst; 253 update_attr(dst, src, attribute, vc); 254 src = dst; 255 } 256 257 if (ops->cursor_state.image.fg_color != fg || 258 ops->cursor_state.image.bg_color != bg || 259 ops->cursor_reset) { 260 ops->cursor_state.image.fg_color = fg; 261 ops->cursor_state.image.bg_color = bg; 262 cursor.set |= FB_CUR_SETCMAP; 263 } 264 265 if ((ops->cursor_state.image.dx != (vc->vc_font.width * vc->state.x)) || 266 (ops->cursor_state.image.dy != (vc->vc_font.height * y)) || 267 ops->cursor_reset) { 268 ops->cursor_state.image.dx = vc->vc_font.width * vc->state.x; 269 ops->cursor_state.image.dy = vc->vc_font.height * y; 270 cursor.set |= FB_CUR_SETPOS; 271 } 272 273 if (ops->cursor_state.image.height != vc->vc_font.height || 274 ops->cursor_state.image.width != vc->vc_font.width || 275 ops->cursor_reset) { 276 ops->cursor_state.image.height = vc->vc_font.height; 277 ops->cursor_state.image.width = vc->vc_font.width; 278 cursor.set |= FB_CUR_SETSIZE; 279 } 280 281 if (ops->cursor_state.hot.x || ops->cursor_state.hot.y || 282 ops->cursor_reset) { 283 ops->cursor_state.hot.x = cursor.hot.y = 0; 284 cursor.set |= FB_CUR_SETHOT; 285 } 286 287 if (cursor.set & FB_CUR_SETSIZE || 288 vc->vc_cursor_type != ops->p->cursor_shape || 289 ops->cursor_state.mask == NULL || 290 ops->cursor_reset) { 291 char *mask = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC); 292 int cur_height, size, i = 0; 293 u8 msk = 0xff; 294 295 if (!mask) 296 return; 297 298 kfree(ops->cursor_state.mask); 299 ops->cursor_state.mask = mask; 300 301 ops->p->cursor_shape = vc->vc_cursor_type; 302 cursor.set |= FB_CUR_SETSHAPE; 303 304 switch (CUR_SIZE(ops->p->cursor_shape)) { 305 case CUR_NONE: 306 cur_height = 0; 307 break; 308 case CUR_UNDERLINE: 309 cur_height = (vc->vc_font.height < 10) ? 1 : 2; 310 break; 311 case CUR_LOWER_THIRD: 312 cur_height = vc->vc_font.height/3; 313 break; 314 case CUR_LOWER_HALF: 315 cur_height = vc->vc_font.height >> 1; 316 break; 317 case CUR_TWO_THIRDS: 318 cur_height = (vc->vc_font.height << 1)/3; 319 break; 320 case CUR_BLOCK: 321 default: 322 cur_height = vc->vc_font.height; 323 break; 324 } 325 size = (vc->vc_font.height - cur_height) * w; 326 while (size--) 327 mask[i++] = ~msk; 328 size = cur_height * w; 329 while (size--) 330 mask[i++] = msk; 331 } 332 333 switch (mode) { 334 case CM_ERASE: 335 ops->cursor_state.enable = 0; 336 break; 337 case CM_DRAW: 338 case CM_MOVE: 339 default: 340 ops->cursor_state.enable = (use_sw) ? 0 : 1; 341 break; 342 } 343 344 cursor.image.data = src; 345 cursor.image.fg_color = ops->cursor_state.image.fg_color; 346 cursor.image.bg_color = ops->cursor_state.image.bg_color; 347 cursor.image.dx = ops->cursor_state.image.dx; 348 cursor.image.dy = ops->cursor_state.image.dy; 349 cursor.image.height = ops->cursor_state.image.height; 350 cursor.image.width = ops->cursor_state.image.width; 351 cursor.hot.x = ops->cursor_state.hot.x; 352 cursor.hot.y = ops->cursor_state.hot.y; 353 cursor.mask = ops->cursor_state.mask; 354 cursor.enable = ops->cursor_state.enable; 355 cursor.image.depth = 1; 356 cursor.rop = ROP_XOR; 357 358 if (info->fbops->fb_cursor) 359 err = info->fbops->fb_cursor(info, &cursor); 360 361 if (err) 362 soft_cursor(info, &cursor); 363 364 ops->cursor_reset = 0; 365 } 366 367 static int bit_update_start(struct fb_info *info) 368 { 369 struct fbcon_ops *ops = info->fbcon_par; 370 int err; 371 372 err = fb_pan_display(info, &ops->var); 373 ops->var.xoffset = info->var.xoffset; 374 ops->var.yoffset = info->var.yoffset; 375 ops->var.vmode = info->var.vmode; 376 return err; 377 } 378 379 void fbcon_set_bitops(struct fbcon_ops *ops) 380 { 381 ops->clear = bit_clear; 382 ops->putcs = bit_putcs; 383 ops->clear_margins = bit_clear_margins; 384 ops->cursor = bit_cursor; 385 ops->update_start = bit_update_start; 386 ops->rotate_font = NULL; 387 388 if (ops->rotate) 389 fbcon_set_rotate(ops); 390 } 391