1 /*- 2 * Copyright (c) 1999 Michael Smith <msmith@freebsd.org> 3 * Copyright (c) 1999 Kazutaka YOKOTA <yokota@freebsd.org> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/kernel.h> 33 #include <sys/linker.h> 34 #include <sys/fbio.h> 35 36 #include <dev/fb/fbreg.h> 37 #include <dev/fb/splashreg.h> 38 #ifndef PC98 39 #include <dev/fb/vgareg.h> 40 41 #include <isa/isareg.h> 42 #endif 43 44 #define FADE_TIMEOUT 15 /* sec */ 45 #define FADE_LEVELS 10 46 47 static int splash_mode = -1; 48 static int splash_on = FALSE; 49 50 static int bmp_start(video_adapter_t *adp); 51 static int bmp_end(video_adapter_t *adp); 52 static int bmp_splash(video_adapter_t *adp, int on); 53 static int bmp_Init(const char *data, int swidth, int sheight, int sdepth); 54 static int bmp_Draw(video_adapter_t *adp); 55 56 static splash_decoder_t bmp_decoder = { 57 "splash_bmp", bmp_start, bmp_end, bmp_splash, SPLASH_IMAGE, 58 }; 59 60 SPLASH_DECODER(splash_bmp, bmp_decoder); 61 62 static int 63 bmp_start(video_adapter_t *adp) 64 { 65 /* currently only 256-color modes are supported XXX */ 66 static int modes[] = { 67 #ifdef PC98 68 /* 69 * As 640x400 doesn't generally look great, 70 * it's least preferred here. 71 */ 72 M_PC98_PEGC640x400, 73 M_PC98_PEGC640x480, 74 M_PC98_EGC640x400, 75 #else 76 M_VESA_CG640x480, 77 M_VESA_CG800x600, 78 M_VESA_CG1024x768, 79 M_CG640x480, 80 /* 81 * As 320x200 doesn't generally look great, 82 * it's least preferred here. 83 */ 84 M_VGA_CG320, 85 #endif 86 -1, 87 }; 88 video_info_t info; 89 int i; 90 91 if ((bmp_decoder.data == NULL) || (bmp_decoder.data_size <= 0)) { 92 printf("splash_bmp: No bitmap file found\n"); 93 return ENODEV; 94 } 95 for (i = 0; modes[i] >= 0; ++i) { 96 if (((*vidsw[adp->va_index]->get_info)(adp, modes[i], &info) == 0) 97 && (bmp_Init((u_char *)bmp_decoder.data, 98 info.vi_width, info.vi_height, info.vi_depth) == 0)) 99 break; 100 } 101 splash_mode = modes[i]; 102 if (splash_mode < 0) 103 printf("splash_bmp: No appropriate video mode found\n"); 104 if (bootverbose) 105 printf("bmp_start(): splash_mode:%d\n", splash_mode); 106 return ((splash_mode < 0) ? ENODEV : 0); 107 } 108 109 static int 110 bmp_end(video_adapter_t *adp) 111 { 112 /* nothing to do */ 113 return 0; 114 } 115 116 static int 117 bmp_splash(video_adapter_t *adp, int on) 118 { 119 static u_char pal[256*3]; 120 static long time_stamp; 121 u_char tpal[256*3]; 122 static int fading = TRUE, brightness = FADE_LEVELS; 123 struct timeval tv; 124 int i; 125 126 if (on) { 127 if (!splash_on) { 128 /* set up the video mode and draw something */ 129 if ((*vidsw[adp->va_index]->set_mode)(adp, splash_mode)) 130 return 1; 131 if (bmp_Draw(adp)) 132 return 1; 133 (*vidsw[adp->va_index]->save_palette)(adp, pal); 134 time_stamp = 0; 135 splash_on = TRUE; 136 } 137 /* 138 * This is a kludge to fade the image away. This section of the 139 * code takes effect only after the system is completely up. 140 * FADE_TIMEOUT should be configurable. 141 */ 142 if (!cold) { 143 getmicrotime(&tv); 144 if (time_stamp == 0) 145 time_stamp = tv.tv_sec; 146 if (tv.tv_sec > time_stamp + FADE_TIMEOUT) { 147 if (fading) 148 if (brightness == 0) { 149 fading = FALSE; 150 brightness++; 151 } 152 else brightness--; 153 else 154 if (brightness == FADE_LEVELS) { 155 fading = TRUE; 156 brightness--; 157 } 158 else brightness++; 159 for (i = 0; i < sizeof(pal); ++i) { 160 tpal[i] = pal[i] * brightness / FADE_LEVELS; 161 } 162 (*vidsw[adp->va_index]->load_palette)(adp, tpal); 163 time_stamp = tv.tv_sec; 164 } 165 } 166 return 0; 167 } else { 168 /* the video mode will be restored by the caller */ 169 splash_on = FALSE; 170 return 0; 171 } 172 } 173 174 /* 175 ** Code to handle Microsoft DIB (".BMP") format images. 176 ** 177 ** Blame me (msmith@freebsd.org) if this is broken, not Soren. 178 */ 179 180 typedef struct tagBITMAPFILEHEADER { /* bmfh */ 181 u_short bfType __attribute__ ((packed)); 182 int bfSize __attribute__ ((packed)); 183 u_short bfReserved1 __attribute__ ((packed)); 184 u_short bfReserved2 __attribute__ ((packed)); 185 int bfOffBits __attribute__ ((packed)); 186 } BITMAPFILEHEADER; 187 188 typedef struct tagBITMAPINFOHEADER { /* bmih */ 189 int biSize __attribute__ ((packed)); 190 int biWidth __attribute__ ((packed)); 191 int biHeight __attribute__ ((packed)); 192 short biPlanes __attribute__ ((packed)); 193 short biBitCount __attribute__ ((packed)); 194 int biCompression __attribute__ ((packed)); 195 int biSizeImage __attribute__ ((packed)); 196 int biXPelsPerMeter __attribute__ ((packed)); 197 int biYPelsPerMeter __attribute__ ((packed)); 198 int biClrUsed __attribute__ ((packed)); 199 int biClrImportant __attribute__ ((packed)); 200 } BITMAPINFOHEADER; 201 202 typedef struct tagRGBQUAD { /* rgbq */ 203 u_char rgbBlue __attribute__ ((packed)); 204 u_char rgbGreen __attribute__ ((packed)); 205 u_char rgbRed __attribute__ ((packed)); 206 u_char rgbReserved __attribute__ ((packed)); 207 } RGBQUAD; 208 209 typedef struct tagBITMAPINFO { /* bmi */ 210 BITMAPINFOHEADER bmiHeader __attribute__ ((packed)); 211 RGBQUAD bmiColors[256] __attribute__ ((packed)); 212 } BITMAPINFO; 213 214 typedef struct tagBITMAPF 215 { 216 BITMAPFILEHEADER bmfh __attribute__ ((packed)); 217 BITMAPINFO bmfi __attribute__ ((packed)); 218 } BITMAPF; 219 220 #define BI_RGB 0 221 #define BI_RLE8 1 222 #define BI_RLE4 2 223 224 /* 225 ** all we actually care about the image 226 */ 227 typedef struct 228 { 229 int width,height; /* image dimensions */ 230 int swidth,sheight; /* screen dimensions for the current mode */ 231 u_char depth; /* image depth (1, 4, 8, 24 bits) */ 232 u_char sdepth; /* screen depth (1, 4, 8 bpp) */ 233 int ncols; /* number of colours */ 234 u_char palette[256][3]; /* raw palette data */ 235 u_char format; /* one of the BI_* constants above */ 236 u_char *data; /* pointer to the raw data */ 237 u_char *index; /* running pointer to the data while drawing */ 238 u_char *vidmem; /* video memory allocated for drawing */ 239 video_adapter_t *adp; 240 int bank; 241 #ifdef PC98 242 u_char prev_val; 243 #endif 244 } BMP_INFO; 245 246 static BMP_INFO bmp_info; 247 248 /* 249 ** bmp_SetPix 250 ** 251 ** Given (info), set the pixel at (x),(y) to (val) 252 ** 253 */ 254 static void 255 bmp_SetPix(BMP_INFO *info, int x, int y, u_char val) 256 { 257 int sofs, bofs; 258 int newbank; 259 260 /* 261 * range check to avoid explosions 262 */ 263 if ((x < 0) || (x >= info->swidth) || (y < 0) || (y >= info->sheight)) 264 return; 265 266 /* 267 * calculate offset into video memory; 268 * because 0,0 is bottom-left for DIB, we have to convert. 269 */ 270 sofs = ((info->height - (y+1) + (info->sheight - info->height) / 2) 271 * info->adp->va_line_width); 272 x += (info->swidth - info->width) / 2; 273 274 switch(info->sdepth) { 275 #ifdef PC98 276 case 4: 277 x += (info->swidth - info->width) / 2; 278 sofs += (x >> 3); 279 bofs = x & 0x7; /* offset within byte */ 280 281 outb(0x7c, 0x80 | 0x40); /* GRCG on & RMW mode */ 282 if (val != info->prev_val) { 283 outb(0x7e, (val & 1) ? 0xff : 0); /* tile B */ 284 outb(0x7e, (val & 2) ? 0xff : 0); /* tile R */ 285 outb(0x7e, (val & 4) ? 0xff : 0); /* tile G */ 286 outb(0x7e, (val & 8) ? 0xff : 0); /* tile I */ 287 288 info->prev_val = val; 289 } 290 291 *(info->vidmem+sofs) = (0x80 >> bofs); /* write new bit */ 292 outb(0x7c, 0); /* GRCG off */ 293 break; 294 #else 295 case 4: 296 case 1: 297 /* EGA/VGA planar modes */ 298 sofs += (x >> 3); 299 newbank = sofs/info->adp->va_window_size; 300 if (info->bank != newbank) { 301 (*vidsw[info->adp->va_index]->set_win_org)(info->adp, newbank*info->adp->va_window_size); 302 info->bank = newbank; 303 } 304 sofs %= info->adp->va_window_size; 305 bofs = x & 0x7; /* offset within byte */ 306 outw(GDCIDX, (0x8000 >> bofs) | 0x08); /* bit mask */ 307 outw(GDCIDX, (val << 8) | 0x00); /* set/reset */ 308 *(info->vidmem + sofs) ^= 0xff; /* read-modify-write */ 309 break; 310 #endif 311 312 case 8: 313 sofs += x; 314 newbank = sofs/info->adp->va_window_size; 315 if (info->bank != newbank) { 316 (*vidsw[info->adp->va_index]->set_win_org)(info->adp, newbank*info->adp->va_window_size); 317 info->bank = newbank; 318 } 319 sofs %= info->adp->va_window_size; 320 *(info->vidmem+sofs) = val; 321 break; 322 } 323 } 324 325 /* 326 ** bmp_DecodeRLE4 327 ** 328 ** Given (data) pointing to a line of RLE4-format data and (line) being the starting 329 ** line onscreen, decode the line. 330 */ 331 static void 332 bmp_DecodeRLE4(BMP_INFO *info, int line) 333 { 334 int count; /* run count */ 335 u_char val; 336 int x,y; /* screen position */ 337 338 x = 0; /* starting position */ 339 y = line; 340 341 /* loop reading data */ 342 for (;;) { 343 /* 344 * encoded mode starts with a run length, and then a byte with 345 * two colour indexes to alternate between for the run 346 */ 347 if (*info->index) { 348 for (count = 0; count < *info->index; count++, x++) { 349 if (count & 1) { /* odd count, low nybble */ 350 bmp_SetPix(info, x, y, *(info->index+1) & 0x0f); 351 } else { /* even count, high nybble */ 352 bmp_SetPix(info, x, y, (*(info->index+1) >>4) & 0x0f); 353 } 354 } 355 info->index += 2; 356 /* 357 * A leading zero is an escape; it may signal the end of the 358 * bitmap, a cursor move, or some absolute data. 359 */ 360 } else { /* zero tag may be absolute mode or an escape */ 361 switch (*(info->index+1)) { 362 case 0: /* end of line */ 363 info->index += 2; 364 return; 365 case 1: /* end of bitmap */ 366 info->index = NULL; 367 return; 368 case 2: /* move */ 369 x += *(info->index + 2); /* new coords */ 370 y += *(info->index + 3); 371 info->index += 4; 372 break; 373 default: /* literal bitmap data */ 374 for (count = 0; count < *(info->index + 1); count++, x++) { 375 val = *(info->index + 2 + (count / 2)); /* byte with nybbles */ 376 if (count & 1) { 377 val &= 0xf; /* get low nybble */ 378 } else { 379 val = (val >> 4); /* get high nybble */ 380 } 381 bmp_SetPix(info, x, y, val); 382 } 383 /* warning, this depends on integer truncation, do not hand-optimise! */ 384 info->index += 2 + ((count + 3) / 4) * 2; 385 break; 386 } 387 } 388 } 389 } 390 391 /* 392 ** bmp_DecodeRLE8 393 ** Given (data) pointing to a line of RLE8-format data and (line) being the starting 394 ** line onscreen, decode the line. 395 */ 396 static void 397 bmp_DecodeRLE8(BMP_INFO *info, int line) 398 { 399 int count; /* run count */ 400 int x,y; /* screen position */ 401 402 x = 0; /* starting position */ 403 y = line; 404 405 /* loop reading data */ 406 for(;;) { 407 /* 408 * encoded mode starts with a run length, and then a byte with 409 * two colour indexes to alternate between for the run 410 */ 411 if (*info->index) { 412 for (count = 0; count < *info->index; count++, x++) 413 bmp_SetPix(info, x, y, *(info->index+1)); 414 info->index += 2; 415 /* 416 * A leading zero is an escape; it may signal the end of the 417 * bitmap, a cursor move, or some absolute data. 418 */ 419 } else { /* zero tag may be absolute mode or an escape */ 420 switch(*(info->index+1)) { 421 case 0: /* end of line */ 422 info->index += 2; 423 return; 424 case 1: /* end of bitmap */ 425 info->index = NULL; 426 return; 427 case 2: /* move */ 428 x += *(info->index + 2); /* new coords */ 429 y += *(info->index + 3); 430 info->index += 4; 431 break; 432 default: /* literal bitmap data */ 433 for (count = 0; count < *(info->index + 1); count++, x++) 434 bmp_SetPix(info, x, y, *(info->index + 2 + count)); 435 /* must be an even count */ 436 info->index += 2 + count + (count & 1); 437 break; 438 } 439 } 440 } 441 } 442 443 /* 444 ** bmp_DecodeLine 445 ** 446 ** Given (info) pointing to an image being decoded, (line) being the line currently 447 ** being displayed, decode a line of data. 448 */ 449 static void 450 bmp_DecodeLine(BMP_INFO *info, int line) 451 { 452 int x; 453 u_char val, mask, *p; 454 455 switch(info->format) { 456 case BI_RGB: 457 switch(info->depth) { 458 case 8: 459 for (x = 0; x < info->width; x++, info->index++) 460 bmp_SetPix(info, x, line, *info->index); 461 info->index += 3 - (--x % 4); 462 break; 463 case 4: 464 p = info->index; 465 for (x = 0; x < info->width; x++) { 466 if (x & 1) { 467 val = *p & 0xf; /* get low nybble */ 468 p++; 469 } else { 470 val = *p >> 4; /* get high nybble */ 471 } 472 bmp_SetPix(info, x, line, val); 473 } 474 /* warning, this depends on integer truncation, do not hand-optimise! */ 475 info->index += ((x + 7) / 8) * 4; 476 break; 477 case 1: 478 p = info->index; 479 mask = 0x80; 480 for (x = 0; x < info->width; x++) { 481 val = (*p & mask) ? 1 : 0; 482 mask >>= 1; 483 if (mask == 0) { 484 mask = 0x80; 485 p++; 486 } 487 bmp_SetPix(info, x, line, val); 488 } 489 /* warning, this depends on integer truncation, do not hand-optimise! */ 490 info->index += ((x + 31) / 32) * 4; 491 break; 492 } 493 break; 494 case BI_RLE4: 495 bmp_DecodeRLE4(info, line); 496 break; 497 case BI_RLE8: 498 bmp_DecodeRLE8(info, line); 499 break; 500 } 501 } 502 503 /* 504 ** bmp_Init 505 ** 506 ** Given a pointer (data) to the image of a BMP file, fill in bmp_info with what 507 ** can be learnt from it. Return nonzero if the file isn't usable. 508 ** 509 ** Take screen dimensions (swidth), (sheight) and (sdepth) and make sure we 510 ** can work with these. 511 */ 512 static int 513 bmp_Init(const char *data, int swidth, int sheight, int sdepth) 514 { 515 BITMAPF *bmf = (BITMAPF *)data; 516 int pind; 517 518 bmp_info.data = NULL; /* assume setup failed */ 519 520 /* check file ID */ 521 if (bmf->bmfh.bfType != 0x4d42) { 522 printf("splash_bmp: not a BMP file\n"); 523 return(1); /* XXX check word ordering for big-endian ports? */ 524 } 525 526 /* do we understand this bitmap format? */ 527 if (bmf->bmfi.bmiHeader.biSize > sizeof(bmf->bmfi.bmiHeader)) { 528 printf("splash_bmp: unsupported BMP format (size=%d)\n", 529 bmf->bmfi.bmiHeader.biSize); 530 return(1); 531 } 532 533 /* save what we know about the screen */ 534 bmp_info.swidth = swidth; 535 bmp_info.sheight = sheight; 536 bmp_info.sdepth = sdepth; 537 538 /* where's the data? */ 539 bmp_info.data = (u_char *)data + bmf->bmfh.bfOffBits; 540 541 /* image parameters */ 542 bmp_info.width = bmf->bmfi.bmiHeader.biWidth; 543 bmp_info.height = bmf->bmfi.bmiHeader.biHeight; 544 bmp_info.depth = bmf->bmfi.bmiHeader.biBitCount; 545 bmp_info.format = bmf->bmfi.bmiHeader.biCompression; 546 547 switch(bmp_info.format) { /* check compression format */ 548 case BI_RGB: 549 case BI_RLE4: 550 case BI_RLE8: 551 break; 552 default: 553 printf("splash_bmp: unsupported compression format\n"); 554 return(1); /* unsupported compression format */ 555 } 556 557 /* palette details */ 558 bmp_info.ncols = (bmf->bmfi.bmiHeader.biClrUsed); 559 bzero(bmp_info.palette,sizeof(bmp_info.palette)); 560 if (bmp_info.ncols == 0) { /* uses all of them */ 561 bmp_info.ncols = 1 << bmf->bmfi.bmiHeader.biBitCount; 562 } 563 if ((bmp_info.height > bmp_info.sheight) || 564 (bmp_info.width > bmp_info.swidth) || 565 (bmp_info.ncols > (1 << sdepth))) { 566 if (bootverbose) 567 printf("splash_bmp: beyond screen capacity (%dx%d, %d colors)\n", 568 bmp_info.width, bmp_info.height, bmp_info.ncols); 569 return(1); 570 } 571 572 /* read palette */ 573 for (pind = 0; pind < bmp_info.ncols; pind++) { 574 bmp_info.palette[pind][0] = bmf->bmfi.bmiColors[pind].rgbRed; 575 bmp_info.palette[pind][1] = bmf->bmfi.bmiColors[pind].rgbGreen; 576 bmp_info.palette[pind][2] = bmf->bmfi.bmiColors[pind].rgbBlue; 577 } 578 return(0); 579 } 580 581 /* 582 ** bmp_Draw 583 ** 584 ** Render the image. Return nonzero if that's not possible. 585 ** 586 */ 587 static int 588 bmp_Draw(video_adapter_t *adp) 589 { 590 int line; 591 int i; 592 593 if (bmp_info.data == NULL) { /* init failed, do nothing */ 594 return(1); 595 } 596 597 /* clear the screen */ 598 bmp_info.vidmem = (u_char *)adp->va_window; 599 bmp_info.adp = adp; 600 (*vidsw[adp->va_index]->clear)(adp); 601 (*vidsw[adp->va_index]->set_win_org)(adp, 0); 602 bmp_info.bank = 0; 603 604 /* initialise the info structure for drawing */ 605 bmp_info.index = bmp_info.data; 606 #ifdef PC98 607 bmp_info.prev_val = 255; 608 #endif 609 610 /* set the palette for our image */ 611 (*vidsw[adp->va_index]->load_palette)(adp, (u_char *)&bmp_info.palette); 612 613 #ifndef PC98 614 /* XXX: this is ugly, but necessary for EGA/VGA 1bpp/4bpp modes */ 615 if ((adp->va_type == KD_EGA) || (adp->va_type == KD_VGA)) { 616 inb(adp->va_crtc_addr + 6); /* reset flip-flop */ 617 outb(ATC, 0x14); 618 outb(ATC, 0); 619 for (i = 0; i < 16; ++i) { 620 outb(ATC, i); 621 outb(ATC, i); 622 } 623 inb(adp->va_crtc_addr + 6); /* reset flip-flop */ 624 outb(ATC, 0x20); /* enable palette */ 625 626 outw(GDCIDX, 0x0f01); /* set/reset enable */ 627 628 if (bmp_info.sdepth == 1) 629 outw(TSIDX, 0x0102); /* unmask plane #0 */ 630 } 631 #endif 632 633 for (line = 0; (line < bmp_info.height) && bmp_info.index; line++) { 634 bmp_DecodeLine(&bmp_info, line); 635 } 636 return(0); 637 } 638