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_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 61 static 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 77 static 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 else 99 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 } 107 108 static 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 } 142 143 static 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 else 174 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 else 188 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 case 198 it's a gain to check buf against NULL even though kfree() handles 199 NULL pointers just fine */ 200 if (unlikely(buf)) 201 kfree(buf); 202 203 } 204 205 static 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 } 235 236 static 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 } 375 376 static 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 } 387 388 void 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