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, int fg, int bg) 63 { 64 struct fb_fillrect region; 65 66 region.color = bg; 67 region.dx = sx * vc->vc_font.width; 68 region.dy = sy * vc->vc_font.height; 69 region.width = width * vc->vc_font.width; 70 region.height = height * vc->vc_font.height; 71 region.rop = ROP_COPY; 72 73 info->fbops->fb_fillrect(info, ®ion); 74 } 75 76 static inline void bit_putcs_aligned(struct vc_data *vc, struct fb_info *info, 77 const u16 *s, u32 attr, u32 cnt, 78 u32 d_pitch, u32 s_pitch, u32 cellsize, 79 struct fb_image *image, u8 *buf, u8 *dst) 80 { 81 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff; 82 u32 idx = vc->vc_font.width >> 3; 83 u8 *src; 84 85 while (cnt--) { 86 src = vc->vc_font.data + (scr_readw(s++)& 87 charmask)*cellsize; 88 89 if (attr) { 90 update_attr(buf, src, attr, vc); 91 src = buf; 92 } 93 94 if (likely(idx == 1)) 95 __fb_pad_aligned_buffer(dst, d_pitch, src, idx, 96 image->height); 97 else 98 fb_pad_aligned_buffer(dst, d_pitch, src, idx, 99 image->height); 100 101 dst += s_pitch; 102 } 103 104 info->fbops->fb_imageblit(info, image); 105 } 106 107 static inline void bit_putcs_unaligned(struct vc_data *vc, 108 struct fb_info *info, const u16 *s, 109 u32 attr, u32 cnt, u32 d_pitch, 110 u32 s_pitch, u32 cellsize, 111 struct fb_image *image, u8 *buf, 112 u8 *dst) 113 { 114 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff; 115 u32 shift_low = 0, mod = vc->vc_font.width % 8; 116 u32 shift_high = 8; 117 u32 idx = vc->vc_font.width >> 3; 118 u8 *src; 119 120 while (cnt--) { 121 src = vc->vc_font.data + (scr_readw(s++)& 122 charmask)*cellsize; 123 124 if (attr) { 125 update_attr(buf, src, attr, vc); 126 src = buf; 127 } 128 129 fb_pad_unaligned_buffer(dst, d_pitch, src, idx, 130 image->height, shift_high, 131 shift_low, mod); 132 shift_low += mod; 133 dst += (shift_low >= 8) ? s_pitch : s_pitch - 1; 134 shift_low &= 7; 135 shift_high = 8 - shift_low; 136 } 137 138 info->fbops->fb_imageblit(info, image); 139 140 } 141 142 static void bit_putcs(struct vc_data *vc, struct fb_info *info, 143 const unsigned short *s, int count, int yy, int xx, 144 int fg, int bg) 145 { 146 struct fb_image image; 147 u32 width = DIV_ROUND_UP(vc->vc_font.width, 8); 148 u32 cellsize = width * vc->vc_font.height; 149 u32 maxcnt = info->pixmap.size/cellsize; 150 u32 scan_align = info->pixmap.scan_align - 1; 151 u32 buf_align = info->pixmap.buf_align - 1; 152 u32 mod = vc->vc_font.width % 8, cnt, pitch, size; 153 u32 attribute = get_attribute(info, scr_readw(s)); 154 u8 *dst, *buf = NULL; 155 156 image.fg_color = fg; 157 image.bg_color = bg; 158 image.dx = xx * vc->vc_font.width; 159 image.dy = yy * vc->vc_font.height; 160 image.height = vc->vc_font.height; 161 image.depth = 1; 162 163 if (attribute) { 164 buf = kmalloc(cellsize, GFP_ATOMIC); 165 if (!buf) 166 return; 167 } 168 169 while (count) { 170 if (count > maxcnt) 171 cnt = maxcnt; 172 else 173 cnt = count; 174 175 image.width = vc->vc_font.width * cnt; 176 pitch = DIV_ROUND_UP(image.width, 8) + scan_align; 177 pitch &= ~scan_align; 178 size = pitch * image.height + buf_align; 179 size &= ~buf_align; 180 dst = fb_get_buffer_offset(info, &info->pixmap, size); 181 image.data = dst; 182 183 if (!mod) 184 bit_putcs_aligned(vc, info, s, attribute, cnt, pitch, 185 width, cellsize, &image, buf, dst); 186 else 187 bit_putcs_unaligned(vc, info, s, attribute, cnt, 188 pitch, width, cellsize, &image, 189 buf, dst); 190 191 image.dx += cnt * vc->vc_font.width; 192 count -= cnt; 193 s += cnt; 194 } 195 196 /* buf is always NULL except when in monochrome mode, so in this case 197 it's a gain to check buf against NULL even though kfree() handles 198 NULL pointers just fine */ 199 if (unlikely(buf)) 200 kfree(buf); 201 202 } 203 204 static void bit_clear_margins(struct vc_data *vc, struct fb_info *info, 205 int color, int bottom_only) 206 { 207 unsigned int cw = vc->vc_font.width; 208 unsigned int ch = vc->vc_font.height; 209 unsigned int rw = info->var.xres - (vc->vc_cols*cw); 210 unsigned int bh = info->var.yres - (vc->vc_rows*ch); 211 unsigned int rs = info->var.xres - rw; 212 unsigned int bs = info->var.yres - bh; 213 struct fb_fillrect region; 214 215 region.color = color; 216 region.rop = ROP_COPY; 217 218 if ((int) rw > 0 && !bottom_only) { 219 region.dx = info->var.xoffset + rs; 220 region.dy = 0; 221 region.width = rw; 222 region.height = info->var.yres_virtual; 223 info->fbops->fb_fillrect(info, ®ion); 224 } 225 226 if ((int) bh > 0) { 227 region.dx = info->var.xoffset; 228 region.dy = info->var.yoffset + bs; 229 region.width = rs; 230 region.height = bh; 231 info->fbops->fb_fillrect(info, ®ion); 232 } 233 } 234 235 static void bit_cursor(struct vc_data *vc, struct fb_info *info, bool enable, 236 int fg, int bg) 237 { 238 struct fb_cursor cursor; 239 struct fbcon_ops *ops = info->fbcon_par; 240 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff; 241 int w = DIV_ROUND_UP(vc->vc_font.width, 8), c; 242 int y = real_y(ops->p, vc->state.y); 243 int attribute, use_sw = vc->vc_cursor_type & CUR_SW; 244 int err = 1; 245 char *src; 246 247 cursor.set = 0; 248 249 if (!vc->vc_font.data) 250 return; 251 252 c = scr_readw((u16 *) vc->vc_pos); 253 attribute = get_attribute(info, c); 254 src = vc->vc_font.data + ((c & charmask) * (w * vc->vc_font.height)); 255 256 if (ops->cursor_state.image.data != src || 257 ops->cursor_reset) { 258 ops->cursor_state.image.data = src; 259 cursor.set |= FB_CUR_SETIMAGE; 260 } 261 262 if (attribute) { 263 u8 *dst; 264 265 dst = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC); 266 if (!dst) 267 return; 268 kfree(ops->cursor_data); 269 ops->cursor_data = dst; 270 update_attr(dst, src, attribute, vc); 271 src = dst; 272 } 273 274 if (ops->cursor_state.image.fg_color != fg || 275 ops->cursor_state.image.bg_color != bg || 276 ops->cursor_reset) { 277 ops->cursor_state.image.fg_color = fg; 278 ops->cursor_state.image.bg_color = bg; 279 cursor.set |= FB_CUR_SETCMAP; 280 } 281 282 if ((ops->cursor_state.image.dx != (vc->vc_font.width * vc->state.x)) || 283 (ops->cursor_state.image.dy != (vc->vc_font.height * y)) || 284 ops->cursor_reset) { 285 ops->cursor_state.image.dx = vc->vc_font.width * vc->state.x; 286 ops->cursor_state.image.dy = vc->vc_font.height * y; 287 cursor.set |= FB_CUR_SETPOS; 288 } 289 290 if (ops->cursor_state.image.height != vc->vc_font.height || 291 ops->cursor_state.image.width != vc->vc_font.width || 292 ops->cursor_reset) { 293 ops->cursor_state.image.height = vc->vc_font.height; 294 ops->cursor_state.image.width = vc->vc_font.width; 295 cursor.set |= FB_CUR_SETSIZE; 296 } 297 298 if (ops->cursor_state.hot.x || ops->cursor_state.hot.y || 299 ops->cursor_reset) { 300 ops->cursor_state.hot.x = cursor.hot.y = 0; 301 cursor.set |= FB_CUR_SETHOT; 302 } 303 304 if (cursor.set & FB_CUR_SETSIZE || 305 vc->vc_cursor_type != ops->p->cursor_shape || 306 ops->cursor_state.mask == NULL || 307 ops->cursor_reset) { 308 char *mask = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC); 309 int cur_height, size, i = 0; 310 u8 msk = 0xff; 311 312 if (!mask) 313 return; 314 315 kfree(ops->cursor_state.mask); 316 ops->cursor_state.mask = mask; 317 318 ops->p->cursor_shape = vc->vc_cursor_type; 319 cursor.set |= FB_CUR_SETSHAPE; 320 321 switch (CUR_SIZE(ops->p->cursor_shape)) { 322 case CUR_NONE: 323 cur_height = 0; 324 break; 325 case CUR_UNDERLINE: 326 cur_height = (vc->vc_font.height < 10) ? 1 : 2; 327 break; 328 case CUR_LOWER_THIRD: 329 cur_height = vc->vc_font.height/3; 330 break; 331 case CUR_LOWER_HALF: 332 cur_height = vc->vc_font.height >> 1; 333 break; 334 case CUR_TWO_THIRDS: 335 cur_height = (vc->vc_font.height << 1)/3; 336 break; 337 case CUR_BLOCK: 338 default: 339 cur_height = vc->vc_font.height; 340 break; 341 } 342 size = (vc->vc_font.height - cur_height) * w; 343 while (size--) 344 mask[i++] = ~msk; 345 size = cur_height * w; 346 while (size--) 347 mask[i++] = msk; 348 } 349 350 ops->cursor_state.enable = enable && !use_sw; 351 352 cursor.image.data = src; 353 cursor.image.fg_color = ops->cursor_state.image.fg_color; 354 cursor.image.bg_color = ops->cursor_state.image.bg_color; 355 cursor.image.dx = ops->cursor_state.image.dx; 356 cursor.image.dy = ops->cursor_state.image.dy; 357 cursor.image.height = ops->cursor_state.image.height; 358 cursor.image.width = ops->cursor_state.image.width; 359 cursor.hot.x = ops->cursor_state.hot.x; 360 cursor.hot.y = ops->cursor_state.hot.y; 361 cursor.mask = ops->cursor_state.mask; 362 cursor.enable = ops->cursor_state.enable; 363 cursor.image.depth = 1; 364 cursor.rop = ROP_XOR; 365 366 if (info->fbops->fb_cursor) 367 err = info->fbops->fb_cursor(info, &cursor); 368 369 if (err) 370 soft_cursor(info, &cursor); 371 372 ops->cursor_reset = 0; 373 } 374 375 static int bit_update_start(struct fb_info *info) 376 { 377 struct fbcon_ops *ops = info->fbcon_par; 378 int err; 379 380 err = fb_pan_display(info, &ops->var); 381 ops->var.xoffset = info->var.xoffset; 382 ops->var.yoffset = info->var.yoffset; 383 ops->var.vmode = info->var.vmode; 384 return err; 385 } 386 387 void fbcon_set_bitops(struct fbcon_ops *ops) 388 { 389 ops->bmove = bit_bmove; 390 ops->clear = bit_clear; 391 ops->putcs = bit_putcs; 392 ops->clear_margins = bit_clear_margins; 393 ops->cursor = bit_cursor; 394 ops->update_start = bit_update_start; 395 ops->rotate_font = NULL; 396 397 if (ops->rotate) 398 fbcon_set_rotate(ops); 399 } 400