16/dos_gfx.cpp

   1 /*\r
   2  * LIB.C v1.2a\r
   3  *\r
   4  * by Robert Schmidt\r
   5  * (C)1993 Ztiff Zox Softwear\r
   6  *\r
   7  * Simple graphics library to accompany the article\r
   8  * \r
   9  *                                        INTRODUCTION TO MODE X.\r
  10  * \r
  11  * This library provides the basic functions for initializing and using\r
  12  * unchained (planar) 256-color VGA modes.  Currently supported are:\r
  13  *\r
  14  *        - 320x200\r
  15  *        - 320x240\r
  16  *\r
  17  * Functions are provided for:\r
  18  *\r
  19  *        - initializing one of the available modes\r
  20  *        - setting the start address of the VGA refresh data\r
  21  *        - setting active and visible display pages\r
  22  *        - writing and reading a single pixel to/from video memory\r
  23  *\r
  24  * The library is provided as a demonstration only, and is not claimed\r
  25  * to be particularly efficient or suited for any purpose.  It has only\r
  26  * been tested with Borland C++ 3.1 by the author.  Comments on success\r
  27  * or disaster with other compilers are welcome.\r
  28  *\r
  29  * This file is public domain.  Do with it whatever you'd like, but\r
  30  * please don't distribute it without the article.\r
  31  *\r
  32  * Thanks go out to various helpful netters who spotted the 0xE7 bug\r
  33  * in the set320x240x256() function!\r
  34  *\r
  35  * Modified by sparky4 so it can be compiled in open watcom ^^\r
  36  */\r
  37 \r
  38 \r
  39 \r
  40 \r
  41 /*\r
  42  * We 'require' a large data model simply to get rid of explicit 'far'\r
  43  * pointers and compiler specific '_fmemset()' functions and the likes.\r
  44  */\r
  45 #if !defined(__COMPACT__)\r
  46 # if !defined(__LARGE__)\r
  47 #  if !defined(__HUGE__)\r
  48 #   error Large data model required!  Try compiling with 'wcc -0 -ml lib.c'.\r
  49 #  endif\r
  50 # endif\r
  51 #endif\r
  52 \r
  53 #include <dos.h>\r
  54 #include <mem.h>\r
  55 #include <conio.h>\r
  56 \r
  57 //code from old library!\r
  58 /*src\lib\*/\r
  59 #include "dos_gfx.h"\r
  60 \r
  61 int old_mode;\r
  62 //color \82Ä\82·\82Æ\r
  63 int gq = LGQ;\r
  64 //\82Ä\82·\82Æ\r
  65 int q = 0;\r
  66 int bakax = 0, bakay = 0;\r
  67 cord xx = rand()&0%320, yy = rand()&0%240, sx = 0, sy = 0;\r
  68 byte coor;\r
  69 \r
  70 /*\r
  71  * Comment out the following #define if you don't want the testing main()\r
  72  * to be included.\r
  73  */\r
  74 #define TESTING\r
  75 \r
  76 /*\r
  77  * Define the port addresses of some VGA registers.\r
  78  */\r
  79 #define CRTC_ADDR          0x3d4   /* Base port of the CRT Controller (color) */\r
  80 \r
  81 #define SEQU_ADDR          0x3c4   /* Base port of the Sequencer */\r
  82 #define GRAC_ADDR          0x3ce   /* Base port of the Graphics Controller */\r
  83 #define STATUS_ADDR     0x3DA\r
  84 \r
  85 unsigned char *RowsX[600];\r
  86 unsigned char write_plane, read_plane;\r
  87 unsigned short text_mask[16] = { 0x0002, 0x0102, 0x0202, 0x0302,\r
  88                                  0x0402, 0x0502, 0x0602, 0x0702,\r
  89                                  0x0802, 0x0902, 0x0A02, 0x0B02,\r
  90                                  0x0C02, 0x0D02, 0x0E02, 0x0F02 };\r
  91 \r
  92 \r
  93 /*\r
  94  * Make a far pointer to the VGA graphics buffer segment.  Your compiler\r
  95  * might not have the MK_FP macro, but you'll figure something out.\r
  96  */\r
  97 byte *vga = (byte *) MK_FP(0xA000, 0);\r
  98 \r
  99 \r
 100 /*\r
 101  * width and height should specify the mode dimensions.  widthBytes\r
 102  * specify the width of a line in addressable bytes.\r
 103  */\r
 104 unsigned width, height, widthBytes;\r
 105 \r
 106 /*\r
 107  * actStart specifies the start of the page being accessed by\r
 108  * drawing operations.  visStart specifies the contents of the Screen\r
 109  * Start register, i.e. the start of the visible page.\r
 110  */\r
 111 unsigned actStart, visStart;\r
 112 \r
 113 /*\r
 114  * set320x200x256_X()\r
 115  *        sets mode 13h, then turns it into an unchained (planar), 4-page\r
 116  *        320x200x256 mode.\r
 117  */\r
 118 void set320x200x256_X(void)\r
 119                 {\r
 120                 union REGS r;\r
 121 \r
 122                 /* Set VGA BIOS mode 13h: */\r
 123                 r.x.ax = 0x0013;\r
 124                 int86(0x10, &r, &r);\r
 125 \r
 126                 /* Turn off the Chain-4 bit (bit 3 at index 4, port 0x3c4): */\r
 127                 outpw(SEQU_ADDR, 0x0604);\r
 128 \r
 129                 /* Turn off word mode, by setting the Mode Control register\r
 130                 of the CRT Controller (index 0x17, port 0x3d4): */\r
 131                 outpw(CRTC_ADDR, 0xE317);\r
 132 \r
 133                 /* Turn off doubleword mode, by setting the Underline Location\r
 134                    register (index 0x14, port 0x3d4): */\r
 135                 outpw(CRTC_ADDR, 0x0014);\r
 136 \r
 137                 /* Clear entire video memory, by selecting all four planes, then\r
 138                    writing 0 to entire segment. */\r
 139                 outpw(SEQU_ADDR, 0x0F02);\r
 140                 memset(vga+1, 0, 0xffff); /* stupid size_t exactly 1 too small */\r
 141                 vga[0] = 0;\r
 142 \r
 143                 /* Update the global variables to reflect dimensions of this\r
 144                    mode.  This is needed by most future drawing operations. */\r
 145                 width              = 320;\r
 146                 height  = 200;\r
 147 \r
 148                 /* Each byte addresses four pixels, so the width of a scan line\r
 149                    in *bytes* is one fourth of the number of pixels on a line. */\r
 150                 widthBytes = width / 4;\r
 151 \r
 152                 /* By default we want screen refreshing and drawing operations\r
 153                    to be based at offset 0 in the video segment. */\r
 154                 actStart = visStart = 0;\r
 155 \r
 156                 /*\r
 157 --------------------\r
 158 HORIZONTAL SCROLLING\r
 159 --------------------\r
 160 Horizontal scrolling is essentially the same as vertical scrolling, all\r
 161 you do is increment or decrement the VGA offset register by 1 instead of\r
 162 80 as with vertical scrolling.\r
 163 \r
 164 However, horizontal scrolling is complicated by two things\r
 165 \r
 166   1. Incrementing the offset register by one actually scrolls by FOUR\r
 167      pixels (and there are FOUR planes on the VGA, what a coincidence)\r
 168 \r
 169   2. You can't draw the image off the screen and then scroll it on\r
 170      because of the way the VGA wraps to the next row every 80 bytes\r
 171      (80 bytes * 4 planes = 320 pixels), if you tried it, you would\r
 172      actually be drawing to the other side of the screen (which is\r
 173      entirely visible)\r
 174 \r
 175 I'll solve these problems one at a time.\r
 176 \r
 177 Firstly, to get the VGA to scroll by only one pixel you use the horizontal\r
 178 pixel panning (HPP) register. This register resides at\r
 179 \r
 180   PORT:     3C0H\r
 181   INDEX:    13h\r
 182 \r
 183 and in real life, you use it like this\r
 184 \r
 185 ----------------- Pixel Panning ---------------\r
 186 IN PORT 3DAH (this clears an internal\r
 187   flip-flop of the VGA)\r
 188 OUT 13H TO PORT 3C0H\r
 189 OUT value TO PORT 3C0H (where "value" is the\r
 190   number of pixels to offset)\r
 191 -----------------------------------------------\r
 192 */\r
 193 \r
 194                 }\r
 195 \r
 196 /*\r
 197  * setActiveStart() tells our graphics operations which address in video\r
 198  * memory should be considered the top left corner.\r
 199  */\r
 200 void setActiveStart(unsigned offset)\r
 201                 {\r
 202                 actStart = offset;\r
 203                 }\r
 204 \r
 205 /*\r
 206  * setVisibleStart() tells the VGA from which byte to fetch the first\r
 207  * pixel when starting refresh at the top of the screen.  This version\r
 208  * won't look very well in time critical situations (games for\r
 209  * instance) as the register outputs are not synchronized with the\r
 210  * screen refresh.  This refresh might start when the high byte is\r
 211  * set, but before the low byte is set, which produces a bad flicker.\r
 212  */\r
 213 void setVisibleStart(unsigned offset)\r
 214                 {\r
 215                 visStart = offset;\r
 216                 outpw(CRTC_ADDR, 0x0C);          /* set high byte */\r
 217                 outpw(CRTC_ADDR+1, visStart >> 8);\r
 218                 outpw(CRTC_ADDR, 0x0D);          /* set low byte */\r
 219                 outpw(CRTC_ADDR+1, visStart & 0xff);\r
 220                 }\r
 221 \r
 222 /*\r
 223  * setXXXPage() sets the specified page by multiplying the page number\r
 224  * with the size of one page at the current resolution, then handing the\r
 225  * resulting offset value over to the corresponding setXXXStart()\r
 226  * function.  The first page is number 0.\r
 227  */\r
 228 void setActivePage(int page)\r
 229                 {\r
 230                 setActiveStart(page * widthBytes * height);\r
 231                 }\r
 232 \r
 233 void setVisiblePage(int page)\r
 234                 {\r
 235                 setVisibleStart(page * widthBytes * height);\r
 236                 }\r
 237 \r
 238 void putPixel_X(int x, int y, byte color)\r
 239                 {\r
 240                 /* Each address accesses four neighboring pixels, so set\r
 241                    Write Plane Enable according to which pixel we want\r
 242                    to modify.  The plane is determined by the two least\r
 243                    significant bits of the x-coordinate: */\r
 244                 outp(0x3c4, 0x02);\r
 245                 outp(0x3c5, 0x01 << (x & 3));\r
 246 \r
 247                 /* The offset of the pixel into the video segment is\r
 248                    offset = (width * y + x) / 4, and write the given\r
 249                    color to the plane we selected above.  Heed the active\r
 250                    page start selection. */\r
 251                 vga[(unsigned)(widthBytes * y) + (x / 4) + actStart] = color;\r
 252 \r
 253                 }\r
 254 \r
 255 byte getPixel_X(int x, int y)\r
 256                 {\r
 257                 /* Select the plane from which we must read the pixel color: */\r
 258                 outpw(GRAC_ADDR, 0x04);\r
 259                 outpw(GRAC_ADDR+1, x & 3);\r
 260 \r
 261                 return vga[(unsigned)(widthBytes * y) + (x / 4) + actStart];\r
 262 \r
 263                 }\r
 264 \r
 265 void set320x240x256_X(void)\r
 266                 {\r
 267                 /* Set the unchained version of mode 13h: */\r
 268                 set320x200x256_X();\r
 269 \r
 270                 /* Modify the vertical sync polarity bits in the Misc. Output\r
 271                    Register to achieve square aspect ratio: */\r
 272                 outp(0x3C2, 0xE3);\r
 273 \r
 274                 /* Modify the vertical timing registers to reflect the increased\r
 275                    vertical resolution, and to center the image as good as\r
 276                    possible: */\r
 277                 outpw(0x3D4, 0x2C11);              /* turn off write protect */\r
 278                 outpw(0x3D4, 0x0D06);              /* vertical total */\r
 279                 outpw(0x3D4, 0x3E07);              /* overflow register */\r
 280                 outpw(0x3D4, 0xEA10);              /* vertical retrace start */\r
 281                 outpw(0x3D4, 0xAC11);              /* vertical retrace end AND wr.prot */\r
 282                 outpw(0x3D4, 0xDF12);              /* vertical display enable end */\r
 283                 outpw(0x3D4, 0xE715);              /* start vertical blanking */\r
 284                 outpw(0x3D4, 0x0616);              /* end vertical blanking */\r
 285 \r
 286                 /* Update mode info, so future operations are aware of the\r
 287                    resolution */\r
 288                 height = 240;\r
 289 \r
 290 //*$pragma aux mxSetVirtualScreen "MXSETVIRTUALSCREEN"\r
 291 mxSetVirtualScreen(480,360);\r
 292                 }\r
 293 \r
 294 \r
 295 /*-----------XXXX-------------*/\r
 296 \r
 297 /////////////////////////////////////////////////////////////////////////////\r
 298 //                                                                         //\r
 299 // WaitRetrace() - This waits until you are in a Verticle Retrace.         //\r
 300 //                                                                         //\r
 301 /////////////////////////////////////////////////////////////////////////////\r
 302 void wait_for_retrace(void)\r
 303 {\r
 304     while (!(inp(STATUS_ADDR) & 0x08));\r
 305 }\r
 306 \r
 307 /////////////////////////////////////////////////////////////////////////////\r
 308 //                                                                         //\r
 309 // MoveTo() - This moves to position X*4 on a chain 4 screen.              //\r
 310 //                Note: As soon as I find documentation, this function     //\r
 311 //                will be better documented.  - Snowman                    //\r
 312 //                                                                         //\r
 313 /////////////////////////////////////////////////////////////////////////////\r
 314 /*\r
 315 void MoveTo (word X, word Y) {\r
 316 \r
 317 //      word O = Y*SIZE*2+X;\r
 318         word O = Y*widthBytes*2+X;\r
 319 \r
 320   asm {\r
 321     mov    bx, [O]\r
 322     mov    ah, bh\r
 323     mov    al, 0x0C\r
 324 \r
 325     mov    dx, 0x3D4\r
 326     out    dx, ax\r
 327 \r
 328     mov    ah, bl\r
 329     mov    al, 0x0D\r
 330     mov    dx, 0x3D4\r
 331     out    dx, ax\r
 332   }\r
 333 \r
 334 ;-----------------------------------------------------------\r
 335 ;\r
 336 ; MXPN.ASM - Panning function\r
 337 ; Copyright (c) 1993,1994 by Alessandro Scotti\r
 338 ;\r
 339 ;-----------------------------------------------------------\r
 340 ;WARN    PRO\r
 341 #pragma aux mxPan = \\r
 342 "INCLUDE MODEX.DEF" \\r
 343 \r
 344 \r
 345 \r
 346 "EXTRN   mxWaitDisplay   : FAR" \\r
 347 "EXTRN   mxStartAddress  : FAR" \\r
 348 \r
 349 MX_TEXT         SEGMENT USE16 PARA PUBLIC 'CODE'\r
 350                 ASSUME cs:MX_TEXT, ds:NOTHING, es:NOTHING\r
 351 \r
 352 EXTRN   mx_BytesPerLine : WORD\r
 353 \r
 354 ;-----------------------------------------------------------\r
 355 ;\r
 356 ; Moves the screen.\r
 357 ;\r
 358 ; Input:\r
 359 ;       X, Y    = new X, Y coordinates of view screen\r
 360 ; Output:\r
 361 ;       none\r
 362 ;\r
 363 mxPan           PROC    FAR\r
 364         ARG     Y:WORD,                 \\r
 365                 X:WORD                  = ARG_SIZE\r
 366         ASSUME  ds:NOTHING\r
 367         .enter  0\r
 368 \r
 369         mov     ax, [Y]\r
 370         mul     [mx_BytesPerLine]\r
 371         mov     dx, [X]\r
 372         shr     dx, 1\r
 373         shr     dx, 1\r
 374         add     ax, dx\r
 375         push    ax                      ; Push the start address\r
 376         call    mxWaitDisplay\r
 377         call    mxStartAddress\r
 378 \r
 379         mov     dx, 03DAh               ; Set the pixel pan register\r
 380         in      al, dx\r
 381         mov     dx, 03C0h\r
 382         mov     al, 33h\r
 383         out     dx, al\r
 384         mov     al, BYTE PTR [X]\r
 385         and     al, 3\r
 386         shl     al, 1\r
 387         out     dx, al\r
 388 \r
 389         xor     ax, ax\r
 390         .leave  ARG_SIZE\r
 391 mxPan           ENDP\r
 392 \r
 393 MX_TEXT         ENDS\r
 394 END\r
 395 \r
 396 \r
 397 }\r
 398 \r
 399 //Procedure Play;\r
 400 void Play()\r
 401 {\r
 402   int loop1,loop2;\r
 403   int xpos,ypos,xdir,ydir;\r
 404   //int ch;\r
 405 //   for(loop1=1;loop1<=62;loop1++)\r
 406      //Pal ((char)loop1,(char)loop1,(char)0,(char)(62-loop1)); // { This sets up the pallette for the pic }\r
 407 \r
 408    moveto(0,0,Size); // { This moves the view to the top left hand corner }\r
 409 \r
 410 //   for(loop1=0;loop1<=3;loop1++)\r
 411 //     for(loop2=0;loop2<=5;loop2++)\r
 412 //       Putpic (loop1*160,loop2*66); // { This places the picture all over the\r
 413                                     //  chain-4 screen }\r
 414 //   getch();\r
 415 //   ch=0x0;\r
 416 //   xpos=rand (78)+1;\r
 417 //   ypos=rand (198)+1; // { Random start positions for the view }\r
 418         xpos=0;\r
 419         ypos=0;\r
 420    xdir=1;\r
 421    ydir=1;\r
 422 //   while(1)\r
 423 //   {\r
 424      WaitRetrace();     //     { Take this out and watch the screen go crazy! }\r
 425      moveto (xpos,ypos,Size);\r
 426      xpos=xpos+xdir;\r
 427      ypos=ypos+ydir;\r
 428      if( (xpos>79)  || (xpos<1))xdir=-xdir;\r
 429      if( (ypos>199) || (ypos<1))ydir=-ydir; // { Hit a boundry, change\r
 430                                             //    direction! }\r
 431 //     if(_bios_keybrd(_KEYBRD_READY))ch=getch();\r
 432 //       if(ch==0x71)break; // 'q'\r
 433 //       if(ch==0x1b)break; // 'ESC'\r
 434 //   }\r
 435 }\r
 436 */\r
 437 /*tile*/\r
 438 //king_crimson's code\r
 439 void putColorBox_X(int x, int y, int w, int h, byte color) {\r
 440         outp(0x3c4, 0x02);\r
 441 \r
 442         int curx, cury;\r
 443         unsigned drawptr;\r
 444         for (curx=x; curx<(x+w); curx++) {\r
 445                 outp(0x3c5, 0x01 << (curx & 3));\r
 446                 drawptr = (unsigned)(widthBytes * y) + (curx / 4) + actStart;\r
 447                 for (cury=0; cury<h; cury++) {\r
 448                         vga[drawptr] = color;\r
 449                         drawptr += widthBytes;\r
 450                 }\r
 451         }\r
 452 }\r
 453 \r
 454 void vScroll(int rows)\r
 455 {\r
 456         // Scrolling = current start + (rows * bytes in a row)\r
 457         setVisibleStart(visStart + (rows * width));\r
 458 }\r
 459 \r
 460 void scrolly(int bongy)\r
 461 {\r
 462         int boingy=0;\r
 463         if(bongy<0)\r
 464                 boingy=-1;\r
 465         else if(bongy>0)\r
 466                 boingy=1;\r
 467 \r
 468         for(int ti=0;ti<TILEWH;ti++)\r
 469         {\r
 470                 delay(1);\r
 471                 vScroll(boingy);\r
 472         }\r
 473 }\r
 474 \r
 475 //king_crimson's code\r
 476 void hScroll(int Cols) {\r
 477         wait_for_retrace();\r
 478         outp(0x3C0, 0x13);\r
 479         outp(0x3C0, Cols & 3);\r
 480         outp(0x3D4, 0x13);\r
 481         outp(0x3D5, Cols >> 2);\r
 482         outp(0x3D4, Cols);\r
 483         //setVisibleStart(visStart + (Cols * height));\r
 484         setVisibleStart(visStart + (Cols * width));\r
 485 }\r
 486 \r
 487 /*To implement smooth horizontal scrolling, you would do the following:\r
 488 -------------- Horizontal Scrolling ------------\r
 489 FOR X = 0 TO 319 DO\r
 490   SET HPP TO ( X MOD 4 )\r
 491   SET VGA OFFSET TO ( X/4 )\r
 492 END FOR\r
 493 ------------------------------------------------\r
 494 \r
 495 Okay, no problem at all (although I think you might have to fiddle\r
 496 around with the HPP a bit to get it right...try different values and\r
 497 see what works :).\r
 498 \r
 499 So, the next problem is with drawing the images off the screen where\r
 500 they aren't visible and then scrolling them on!!! As it turns out,\r
 501 there's yet ANOTHER register to accomplish this. This one's called the\r
 502 offset register (no, not the one I was talking about before, that one\r
 503 was actually the "start address" register) and it's at\r
 504 \r
 505   PORT:     3D4H/3D5H\r
 506   OFFSET:   13H\r
 507 \r
 508 and here's how to use it\r
 509 \r
 510 -------------- Offset Register ---------------\r
 511 OUT 13H TO PORT 3D4H\r
 512 OUT value TO PORT 3D5H\r
 513 ----------------------------------------------\r
 514 \r
 515 Now, what my VGA reference says is that this register holds the number\r
 516 of bytes (not pixels) difference between the start address of each row.\r
 517 So, in X-mode it normally contains the value 80 (as we remember,\r
 518 80 bytes * 4 planes = 320 pixels). This register does not affect the\r
 519 VISIBLE width of the display, only the difference between addresses on\r
 520 each row.\r
 521 \r
 522 When we scroll horizontally, we need a little bit of extra working space\r
 523 so we can draw off the edge of the screen.\r
 524 \r
 525 Perhaps a little diagram will clarify it. The following picture is of a\r
 526 standard X-mode addressing scheme with the OFFSET register set to 80.\r
 527 \r
 528       ROW    OFFSET\r
 529       0         0 ========================\r
 530       1        80 [                      ]\r
 531       2       160 [                      ]\r
 532       ..       .. [       VISIBLE        ]\r
 533                   [        SCREEN        ]\r
 534                   [                      ]\r
 535                   [                      ]\r
 536       ..       .. [                      ]\r
 537       199   15920 ========================\r
 538 \r
 539 and the next diagram is of a modified addressing scheme with the OFFSET\r
 540 register set to 82 (to give us 4 extra pixels on each side of the screen)\r
 541 \r
 542 ROW    OFFSET\r
 543 0         0 ------========================------\r
 544 1        82 |   V [                      ]   V |\r
 545 2       164 |   I [                      ]   I |\r
 546 ..       .. | N S [      VISIBLE         ] N S |\r
 547             | O I [       SCREEN         ] O I |\r
 548             | T B [                      ] T B |\r
 549             |   L [                      ]   L |\r
 550 ..       .. |   E [                      ]   E |\r
 551 199   16318 ------========================------\r
 552 \r
 553 Beautiful!!!\r
 554 \r
 555 As with vertical scrolling, however, you still have the problem of when\r
 556 you reach the bottom of page 4...and it's fixed in the same manner.\r
 557 \r
 558 I haven't actually managed to get infinite horizontal scrolling working,\r
 559 but the method I have just stated will give you a horizontal scrolling\r
 560 range of over 200 screens!!!! So if you need more (which is extremely\r
 561 unlikely), figure it out yourself.\r
 562 \r
 563 \r
 564 ------------------\r
 565 COMBINED SCROLLING\r
 566 ------------------\r
 567 To do both horizontal and vertical scrolling, all you have to do is combine\r
 568 the two methods with a few little extras (it's always the way isn't it).\r
 569 \r
 570 You have to start off with the original screen on the current page and the\r
 571 next page as well. When you scroll horizontally, you have to draw the edge\r
 572 that's coming in to the screen to BOTH pages (that means you'll be drawing\r
 573 the incoming edge twice, once for each page). You do this so that when you\r
 574 have scrolled vertically down through a complete page, you can jump back\r
 575 to the first page and it will (hopefully) have an identical copy, and you\r
 576 can then continue scrolling again.\r
 577 \r
 578 I'm sorry about this being so confusing but it's a bit difficult to explain.\r
 579 \r
 580 \r
 581 */\r
 582 int loadfontX(char *fname)\r
 583 {\r
 584         FILE *fp;\r
 585 \r
 586         fp = fopen(fname, "rb");\r
 587 \r
 588         if (fp == NULL) {\r
 589                 return 0;\r
 590         } else {\r
 591                 fread(Xfont, 8, 256, fp);\r
 592                 fclose(fp);\r
 593                 return 1;\r
 594         }\r
 595 }\r
 596 \r
 597 void putchX(cord x, cord y, char c, byte color)\r
 598 {\r
 599         int i;\r
 600         byte *vga_ptr;\r
 601         byte *font_ptr;\r
 602         byte temp;\r
 603 \r
 604         // 8x8 font\r
 605         vga_ptr = RowsX[y << 3] + (x << 1) + actStart;\r
 606         write_plane = -1;\r
 607 \r
 608         font_ptr = Xfont + (c << 3);\r
 609 \r
 610         i=8;\r
 611         while (i--) {\r
 612                 temp = *font_ptr++;\r
 613                 outpw(SEQU_ADDR, text_mask[temp & 0x0F]);\r
 614                 *vga_ptr++ = color;\r
 615 \r
 616                 outpw(SEQU_ADDR, text_mask[temp >> 4]);\r
 617                 *vga_ptr-- = color;\r
 618                 vga_ptr += widthBytes;\r
 619         }\r
 620 }\r
 621 \r
 622 void putstringX(cord x, cord y, char *str, byte color)\r
 623 {\r
 624         int i, skip;\r
 625         byte *vga_ptr;\r
 626         byte *font_ptr;\r
 627         byte c, temp;\r
 628 \r
 629         // 8x8 font\r
 630         vga_ptr = RowsX[y << 3] + (x << 1) + actStart;\r
 631         write_plane = -1;\r
 632 \r
 633         skip = 2 - (widthBytes << 3);\r
 634 \r
 635         while (c = *str++) {\r
 636                 font_ptr = Xfont + (c << 3);\r
 637 \r
 638                 i=8;\r
 639                 while (i--) {\r
 640                         temp = *font_ptr++;\r
 641                         outpw(SEQU_ADDR, text_mask[temp & 0x0F]);\r
 642                         *vga_ptr++ = color;\r
 643 \r
 644                         outpw(SEQU_ADDR, text_mask[temp >> 4]);\r
 645                         *vga_ptr-- = color;\r
 646                         vga_ptr += widthBytes;\r
 647                 }\r
 648 \r
 649                 vga_ptr += skip;\r
 650         }\r
 651 }\r
 652 \r
 653 /////////////////////////////////////////////////////////////////////////////\r
 654 //                                                                         //\r
 655 // setvideo() - This function Manages the video modes                                     //\r
 656 //                                                                         //\r
 657 /////////////////////////////////////////////////////////////////////////////\r
 658 void setvideo(/*byte mode, */int vq){\r
 659                 union REGS in, out;\r
 660 \r
 661                 if(!vq){ // deinit the video\r
 662                                 // change to the video mode we were in before we switched to mode 13h\r
 663                                 in.h.ah = 0x00;\r
 664                                 in.h.al = old_mode;\r
 665                                 int86(0x10, &in, &out);\r
 666 \r
 667                 }else if(vq == 1){ // init the video\r
 668                                 // get old video mode\r
 669                                 in.h.ah = 0xf;\r
 670                                 int86(0x10, &in, &out);\r
 671                                 old_mode = out.h.al;\r
 672 \r
 673                                 // enter mode\r
 674                                 set320x240x256_X();\r
 675                 }\r
 676 }\r
 677 \r
 678 /////////////////////////////////////////////////////////////////////////////\r
 679 //                                                                                                                                               //\r
 680 // cls() - This clears the screen to the specified color, on the VGA or on //\r
 681 //               the Virtual screen.                                                                                     //\r
 682 //                                                                                                                                               //\r
 683 /////////////////////////////////////////////////////////////////////////////\r
 684 void cls(byte color, byte *Where){\r
 685                 _fmemset(Where, color, width*(height*17));\r
 686 }\r
 687 \r
 688 //color \82Ä\82·\82Æ\r
 689 int colortest(){\r
 690                 if(gq < NUM_COLORS){\r
 691                                 cls(gq, vga);\r
 692                                 gq++;\r
 693                 }else gq = 0;\r
 694                 return gq;\r
 695 }\r
 696 \r
 697 //color \82Ä\82·\82Æ\r
 698 int colorz(){\r
 699                 if(gq < HGQ){\r
 700 //----            cls(gq, vaddr);\r
 701                                 cls(gq, vga);\r
 702                                 gq++;\r
 703                 }else gq = LGQ;\r
 704                 return gq;\r
 705 }\r
 706 \r
 707 //slow spectrum down\r
 708 void ssd(int svq){\r
 709                 if(sy < height+1){\r
 710                                 if(sx < width+1){\r
 711                                                 //plotpixel(xx, yy, coor, vga);\r
 712                                                 //ppf(sx, sy, coor, vga);\r
 713                                                 putPixel_X(sx, sy, coor);\r
 714                                                 //printf("%d %d %d %d\n", sx, sy, svq, coor);\r
 715                                                 sx++;\r
 716                                 }else sx = 0;\r
 717                                 if(sx == width){\r
 718                                                 sy++;\r
 719                                                 if(svq == 7) coor++;\r
 720                                                 if(sy == height && svq == 8) coor = rand()%NUM_COLORS;\r
 721                                 }\r
 722                 }else sy = 0;\r
 723 }\r
 724 \r
 725 /*-----------ding-------------*/\r
 726 int ding(int q){\r
 727 \r
 728 //      if(yy<height){\r
 729                 setActivePage(0);\r
 730                 setVisiblePage(0);\r
 731 /*      }\r
 732         if((height)<yy<(height*2)){\r
 733                 setActivePage(1);\r
 734                 setVisiblePage(1);\r
 735         }\r
 736         if((height*2)<yy<(height*3)){\r
 737                 setActivePage(2);\r
 738                 setVisiblePage(2);\r
 739         }*/\r
 740                 int d3y;\r
 741 \r
 742 //++++  if(q <= 4 && q!=2 && gq == BONK-1) coor = rand()%HGQ;\r
 743                 if((q == 2\r
 744                 ||q==4\r
 745                 ||q==16\r
 746                 ) && gq == BONK){\r
 747                                                 if(coor < HGQ && coor < LGQ) coor = LGQ;\r
 748                                                 if(coor < HGQ-1){\r
 749                                                                 coor++;\r
 750                                 }else{ coor = LGQ;\r
 751                                                 bakax = rand()%3; bakay = rand()%3;\r
 752                                 }\r
 753                 }\r
 754 \r
 755                 if(q==8){ colorz(); return gq; }else\r
 756                 if(q==10){ ssd(q); /*printf("%d\n", coor);*/ }else\r
 757                 if(q==5){ colortest(); return gq; }else\r
 758                 if(q==11){ colorz(); delay(100); return gq; }\r
 759                 if(q==6){\r
 760                                 coor = rand()%NUM_COLORS;\r
 761 //----            cls(coor, vaddr);\r
 762                                 cls(coor, vga);\r
 763                                 //updatevbuff();\r
 764                 }\r
 765 \r
 766                 if(q==7||q==9){\r
 767                                 if(gq < HGQ){\r
 768                                                 if(q == 7) ssd(q);\r
 769                                                 if(q == 9){ ssd(q); coor++; }\r
 770                                                 gq++;\r
 771                                 }else gq = LGQ;\r
 772                 }\r
 773                 if((q<5 && gq<BONK) || (q==16 && gq<BONK)){ // the number variable make the colors more noticable\r
 774                                 if(q==1){\r
 775                                                 if(xx==width){bakax=0;}\r
 776                                                 if(xx==0){bakax=1;}\r
 777                                                 if(yy==height){bakay=0;}\r
 778                                                 if(yy==0){bakay=1;}\r
 779                                 }else if(q==3){\r
 780                                                 if(xx!=width||yy!=height){\r
 781                                                                 if(xx==0){bakax=1;bakay=-1;d3y=1;}\r
 782                                                                 if(yy==0){bakax=1;bakay=0;d3y=1;}\r
 783                                                                 if(xx==width){bakax=-1;bakay=-1;d3y=1;}\r
 784                                                                 if(yy==height){bakax=1;bakay=0;d3y=1;}\r
 785                                                 }else if(xx==width&&yy==height) xx=yy=0;\r
 786                                 }\r
 787                                 if(q==3){\r
 788                                                 if(d3y){\r
 789                                                                 if(bakay<0){\r
 790                                                                                 yy--;\r
 791                                                                                 d3y--;\r
 792                                                                 }else\r
 793                                                                 if(bakay>0){\r
 794                                                                                 yy++;\r
 795                                                                                 d3y--;\r
 796                                                                 }\r
 797                                                 }\r
 798                                                 if(bakax<0){\r
 799                                                                 xx--;\r
 800                                                 }else\r
 801                                                 if(bakax>0){\r
 802                                                                 xx++;\r
 803                                                 }\r
 804                                 }else{\r
 805                                                 if(q==16)\r
 806                                                 {\r
 807                                                                 if(!bakax){\r
 808                                                                                 xx--;//=TILEWH;\r
 809                                                                 }else if(bakax>0){\r
 810                                                                                 xx++;//=TILEWH;\r
 811                                                                 }\r
 812                                                                 if(!bakay){\r
 813                                                                                 yy--;//=TILEWH;\r
 814                                                                 }else if(bakay>0){\r
 815                                                                                 yy++;//=TILEWH;\r
 816                                                                 }\r
 817                                                 }else{\r
 818                                                                 if(!bakax){\r
 819 //                                                                              xx-=TILEWH;\r
 820                                                                                 xx--;\r
 821                                                                 }else if(bakax>1){\r
 822 //                                                                              xx+=TILEWH;\r
 823                                                                                 xx++;\r
 824                                                                 }\r
 825                                                                 if(!bakay){\r
 826 //                                                                              yy-=TILEWH;\r
 827                                                                                 yy--;\r
 828                                                                 }else if(bakay>1){\r
 829 //                                                                              yy+=TILEWH;\r
 830                                                                                 yy++;\r
 831                                                                 }\r
 832                                                 }\r
 833                                 }\r
 834                                 // fixer\r
 835 //                              if(q!=16){\r
 836 //if(q!=16)\r
 837 //                                              if(xx<(0/*-(TILEWH/2)*/)) xx=(width/*+(TILEWH)*/);\r
 838                                                 if(yy<0) yy=(height*3);\r
 839 //                                              if(xx>(width/*+(TILEWH)*/)) xx=(0/*-(TILEWH/2)*/);\r
 840                                                 if(yy>(height*3)) yy=0;\r
 841 //                              }\r
 842 \r
 843 //interesting effects\r
 844                                 if(q==16)\r
 845                                 {\r
 846                                 int tx=0,ty=0;\r
 847                                 tx+=xx+16;\r
 848                                 ty+=yy+16;\r
 849                                 putPixel_X(tx, ty, coor);\r
 850                                 //drawrect(tx, ty, tx+TILEWH, ty+TILEWH, coor);\r
 851                                 //printf("%d %d %d %d %d %d\n", xx, yy, tx, ty, TILEWH);\r
 852 \r
 853                                 // plot the pixel\r
 854 //----            ppf(xx, yy, coor, vga);\r
 855                                 }else /*if(xx>=0 && xx<width && yy>=0 && yy<(height*3))*/{\r
 856 //                                      putColorBox_X(xx, yy, TILEWH, TILEWH, coor);\r
 857 //++++0000\r
 858                                         putPixel_X(xx, yy, coor);\r
 859                                 } \r
 860 \r
 861 //----            if(q==2) ppf(rand()%, rand()%height, 0, vga);\r
 862 //                              if(q==2) putColorBox_X(rand()%width, rand()%(height*3), TILEWH, TILEWH, 0);\r
 863 //++++0000\r
 864                                 if(q==2) putPixel_X(rand()%width, rand()%(height*3), 0);\r
 865                                 if(q==16) putPixel_X(rand()%width, rand()%(height*3), 0);\r
 866                                 if(q==2||q==4||q==16){ bakax = rand()%3; bakay = rand()%3; }\r
 867                                 gq++;\r
 868 //if(xx<0||xx>320||yy<0||yy>(height*3))\r
 869 //        printf("%d %d %d %d %d %d\n", xx, yy, coor, bakax, bakay, getPixel_X(xx,yy));\r
 870 //        printf("%d\n", getPixel_X(xx,yy));\r
 871 //0000\r
 872 //        drawText(0, 0, 15, getPixel_X(xx,yy));\r
 873                 }else gq = LGQ;\r
 874                 return gq;\r
 875 }\r
 876 \r
 877 \r
 878 /*\r
 879  * The library testing routines follows below.\r
 880  */\r
 881 \r
 882 \r
 883 #ifdef TESTING\r
 884 \r
 885 #include <stdio.h>\r
 886 #include <conio.h>\r
 887 \r
 888 void doTest(void)\r
 889                 {\r
 890                 int p, x, y, pages;\r
 891 \r
 892                 /* This is the way to calculate the number of pages available. */\r
 893                 pages = 65536L/(widthBytes*height); // apparently this takes the A000 address\r
 894 //              if(height==240) pages++;\r
 895 \r
 896 //              printf("%d\n", pages);\r
 897 \r
 898                 for (p = 0; p <= pages; ++p)\r
 899                                 {\r
 900                                 setActivePage(p);\r
 901 \r
 902                                 /* On each page draw a single colored border, and dump the palette\r
 903                                    onto a small square about the middle of the page. */\r
 904 \r
 905                                    //{\r
 906                                                 for (x = 0; x <= width; ++x)\r
 907                                                                 {\r
 908                                                                 putPixel_X(x, 0, p+1);\r
 909                                                                 if(p!=pages) putPixel_X(x, height-1, p+1);\r
 910                                                                                 else if(height==240) putPixel_X(x, 99-1, p+1);\r
 911                                                                 }\r
 912 \r
 913                                                 for (y = 0; y <= height; ++y)\r
 914                                                                 {\r
 915                                                                 putPixel_X(0, y, p+1);\r
 916                                                                 if(p!=pages) putPixel_X(width-1, y, p+1);\r
 917                                                                                 else if(height==240) putPixel_X(width-1, y, p+1);\r
 918                                                                 }\r
 919 \r
 920                                                 for (x = 0; x < TILEWH; ++x)\r
 921                                                                 for (y = 0; y < TILEWH; ++y)\r
 922                                                                                 putPixel_X(x+(p+2)*16, y+(p+2)*TILEWH, x + y*TILEWH);\r
 923                                                 //}\r
 924 \r
 925                                 }\r
 926 \r
 927                 /* Each pages will now contain a different image.  Let the user cycle\r
 928                    through all the pages by pressing a key. */\r
 929                 for (p = 0; p < pages; ++p)\r
 930                                 {\r
 931                                 setVisiblePage(p);\r
 932                                 getch();\r
 933                                 }\r
 934 \r
 935                 }\r
 936 \r
 937 /*\r
 938  * Library test (program) entry point.\r
 939  */\r
 940 \r
 941 int main(void)\r
 942                 {\r
 943                 int key,d;\r
 944                 //short int temp;\r
 945                 // main variables\r
 946                 d=1; // switch variable\r
 947                 key=4; // default screensaver number\r
 948 //        puts("First, have a look at the 320x200 mode.  I will draw some rubbish");\r
 949 //        puts("on all of the four pages, then let you cycle through them by");\r
 950 //        puts("hitting a key on each page.");\r
 951 //        puts("Press a key when ready...");\r
 952 //        getch();\r
 953 \r
 954 //        doTest();\r
 955 \r
 956 //        puts("Then, check out Mode X, 320x240 with 3 (and a half) pages.");\r
 957 //        puts("Press a key when ready...");\r
 958 //        getch();\r
 959 \r
 960 //++++0000\r
 961                 setvideo(1);\r
 962                 /*temp = loadfontX("vga8x8.fnt");\r
 963 \r
 964                 if (temp) {\r
 965                         putstringX(0, 0, "bakapi!", 2);\r
 966                 }\r
 967                 getch();*/\r
 968 // screen savers\r
 969 \r
 970 /*while(d!=0){ // on!\r
 971                                 if(!kbhit()){ // conditions of screen saver\r
 972                                                 ding(key);\r
 973                                 }else{\r
 974                                                 setvideo(0);\r
 975                                                 // user imput switch\r
 976                                                 printf("Enter 1, 2, 3, 4, or 6 to run a screensaver, or enter 5 to quit.\n", getch());  // prompt the user\r
 977                                                 scanf("%d", &key);\r
 978                                                 //if(key==3){xx=yy=0;} // crazy screen saver wwww\r
 979                                                 if(key==5) d=0;\r
 980                                                 setvideo(1);\r
 981                                 }\r
 982                 }*/ // else off\r
 983                 while(!kbhit()){ // conditions of screen saver\r
 984                         ding(4);\r
 985                 }\r
 986                 //end of screen savers\r
 987                 doTest();\r
 988 //              getch();\r
 989 \r
 990                 while(!kbhit()){ // conditions of screen saver\r
 991 //                      hScroll(1);\r
 992 //                      scrolly(1);\r
 993                         vScroll(1);\r
 994 //                      delay(100);\r
 995 //                      Play();\r
 996                 }\r
 997 //++++0000\r
 998                 setvideo(0);\r
 999                 printf("wwww\n[%d][%d]\n", width,height);\r
1000 //              setvideo(0);\r
1001 //mxTerm();\r
1002 //mxGetVersion();\r
1003                 puts("where to next?  It's your move! wwww");\r
1004                 printf("bakapi ver. 1.04.09.03\nis made by sparky4\81i\81\86\83Ö\81\85\81j feel free to use it ^^\nLicence: GPL v2\n");\r
1005                 return 0;\r
1006                 }\r
1007 \r
1008 #endif\r