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 #include "lib\x\modex.h"\r
  61 \r
  62 int old_mode;\r
  63 //color \82Ä\82·\82Æ\r
  64 int gq = LGQ;\r
  65 //\82Ä\82·\82Æ\r
  66 int q = 0;\r
  67 int bakax = 0, bakay = 0;\r
  68 int xx = rand()&0%320, yy = rand()&0%240, sx = 0, sy = 0;\r
  69 byte coor;\r
  70 \r
  71 /*\r
  72  * Comment out the following #define if you don't want the testing main()\r
  73  * to be included.\r
  74  */\r
  75 #define TESTING\r
  76 \r
  77 /*\r
  78  * Define the port addresses of some VGA registers.\r
  79  */\r
  80 #define CRTC_ADDR          0x3d4   /* Base port of the CRT Controller (color) */\r
  81 \r
  82 #define SEQU_ADDR          0x3c4   /* Base port of the Sequencer */\r
  83 #define GRAC_ADDR          0x3ce   /* Base port of the Graphics Controller */\r
  84 \r
  85 \r
  86 /*\r
  87  * Make a far pointer to the VGA graphics buffer segment.  Your compiler\r
  88  * might not have the MK_FP macro, but you'll figure something out.\r
  89  */\r
  90 byte *vga = (byte *) MK_FP(0xA000, 0);\r
  91 \r
  92 //fontAddr = getFont();\r
  93 \r
  94 /*\r
  95  * width and height should specify the mode dimensions.  widthBytes\r
  96  * specify the width of a line in addressable bytes.\r
  97  */\r
  98 unsigned width, height, widthBytes;\r
  99 \r
 100 /*\r
 101  * actStart specifies the start of the page being accessed by\r
 102  * drawing operations.  visStart specifies the contents of the Screen\r
 103  * Start register, i.e. the start of the visible page.\r
 104  */\r
 105 unsigned actStart, visStart;\r
 106 \r
 107 /*\r
 108  * set320x200x256_X()\r
 109  *        sets mode 13h, then turns it into an unchained (planar), 4-page\r
 110  *        320x200x256 mode.\r
 111  */\r
 112 void set320x200x256_X(void)\r
 113                 {\r
 114                 union REGS r;\r
 115 \r
 116                 /* Set VGA BIOS mode 13h: */\r
 117                 r.x.ax = 0x0013;\r
 118                 int86(0x10, &r, &r);\r
 119 \r
 120                 /* Turn off the Chain-4 bit (bit 3 at index 4, port 0x3c4): */\r
 121                 outpw(SEQU_ADDR, 0x0604);\r
 122 \r
 123                 /* Turn off word mode, by setting the Mode Control register\r
 124                 of the CRT Controller (index 0x17, port 0x3d4): */\r
 125                 outpw(CRTC_ADDR, 0xE317);\r
 126 \r
 127                 /* Turn off doubleword mode, by setting the Underline Location\r
 128                    register (index 0x14, port 0x3d4): */\r
 129                 outpw(CRTC_ADDR, 0x0014);\r
 130 \r
 131                 /* Clear entire video memory, by selecting all four planes, then\r
 132                    writing 0 to entire segment. */\r
 133                 outpw(SEQU_ADDR, 0x0F02);\r
 134                 memset(vga+1, 0, 0xffff); /* stupid size_t exactly 1 too small */\r
 135                 vga[0] = 0;\r
 136 \r
 137                 /* Update the global variables to reflect dimensions of this\r
 138                    mode.  This is needed by most future drawing operations. */\r
 139                 width              = 320;\r
 140                 height  = 200;\r
 141 \r
 142                 /* Each byte addresses four pixels, so the width of a scan line\r
 143                    in *bytes* is one fourth of the number of pixels on a line. */\r
 144                 widthBytes = width / 4;\r
 145 \r
 146                 /* By default we want screen refreshing and drawing operations\r
 147                    to be based at offset 0 in the video segment. */\r
 148                 actStart = visStart = 0;\r
 149 \r
 150                 /*\r
 151 --------------------\r
 152 HORIZONTAL SCROLLING\r
 153 --------------------\r
 154 Horizontal scrolling is essentially the same as vertical scrolling, all\r
 155 you do is increment or decrement the VGA offset register by 1 instead of\r
 156 80 as with vertical scrolling.\r
 157 \r
 158 However, horizontal scrolling is complicated by two things\r
 159 \r
 160   1. Incrementing the offset register by one actually scrolls by FOUR\r
 161      pixels (and there are FOUR planes on the VGA, what a coincidence)\r
 162 \r
 163   2. You can't draw the image off the screen and then scroll it on\r
 164      because of the way the VGA wraps to the next row every 80 bytes\r
 165      (80 bytes * 4 planes = 320 pixels), if you tried it, you would\r
 166      actually be drawing to the other side of the screen (which is\r
 167      entirely visible)\r
 168 \r
 169 I'll solve these problems one at a time.\r
 170 \r
 171 Firstly, to get the VGA to scroll by only one pixel you use the horizontal\r
 172 pixel panning (HPP) register. This register resides at\r
 173 \r
 174   PORT:     3C0H\r
 175   INDEX:    13h\r
 176 \r
 177 and in real life, you use it like this\r
 178 \r
 179 ----------------- Pixel Panning ---------------\r
 180 IN PORT 3DAH (this clears an internal\r
 181   flip-flop of the VGA)\r
 182 OUT 13H TO PORT 3C0H\r
 183 OUT value TO PORT 3C0H (where "value" is the\r
 184   number of pixels to offset)\r
 185 -----------------------------------------------\r
 186 */\r
 187                 inp(0x3DA);\r
 188                 outpw(0x3C0, 0x13);\r
 189                 outpw(0x3C0, 0x58);\r
 190 \r
 191                 }\r
 192 \r
 193 /*\r
 194  * setActiveStart() tells our graphics operations which address in video\r
 195  * memory should be considered the top left corner.\r
 196  */\r
 197 void setActiveStart(unsigned offset)\r
 198                 {\r
 199                 actStart = offset;\r
 200                 }\r
 201 \r
 202 /*\r
 203  * setVisibleStart() tells the VGA from which byte to fetch the first\r
 204  * pixel when starting refresh at the top of the screen.  This version\r
 205  * won't look very well in time critical situations (games for\r
 206  * instance) as the register outputs are not synchronized with the\r
 207  * screen refresh.  This refresh might start when the high byte is\r
 208  * set, but before the low byte is set, which produces a bad flicker.\r
 209  */\r
 210 void setVisibleStart(unsigned offset)\r
 211                 {\r
 212                 visStart = offset;\r
 213                 outpw(CRTC_ADDR, 0x0C);          /* set high byte */\r
 214                 outpw(CRTC_ADDR+1, visStart >> 8);\r
 215                 outpw(CRTC_ADDR, 0x0D);          /* set low byte */\r
 216                 outpw(CRTC_ADDR+1, visStart & 0xff);\r
 217                 }\r
 218 \r
 219 /*\r
 220  * setXXXPage() sets the specified page by multiplying the page number\r
 221  * with the size of one page at the current resolution, then handing the\r
 222  * resulting offset value over to the corresponding setXXXStart()\r
 223  * function.  The first page is number 0.\r
 224  */\r
 225 void setActivePage(int page)\r
 226                 {\r
 227                 setActiveStart(page * widthBytes * height);\r
 228                 }\r
 229 \r
 230 void setVisiblePage(int page)\r
 231                 {\r
 232                 setVisibleStart(page * widthBytes * height);\r
 233                 }\r
 234 \r
 235 void putPixel_X(int x, int y, byte color)\r
 236                 {\r
 237                 /* Each address accesses four neighboring pixels, so set\r
 238                    Write Plane Enable according to which pixel we want\r
 239                    to modify.  The plane is determined by the two least\r
 240                    significant bits of the x-coordinate: */\r
 241                 outp(0x3c4, 0x02);\r
 242                 outp(0x3c5, 0x01 << (x & 3));\r
 243 \r
 244                 /* The offset of the pixel into the video segment is\r
 245                    offset = (width * y + x) / 4, and write the given\r
 246                    color to the plane we selected above.  Heed the active\r
 247                    page start selection. */\r
 248                 vga[(unsigned)(widthBytes * y) + (x / 4) + actStart] = color;\r
 249 \r
 250                 }\r
 251 \r
 252 byte getPixel_X(int x, int y)\r
 253                 {\r
 254                 /* Select the plane from which we must read the pixel color: */\r
 255                 outpw(GRAC_ADDR, 0x04);\r
 256                 outpw(GRAC_ADDR+1, x & 3);\r
 257 \r
 258                 return vga[(unsigned)(widthBytes * y) + (x / 4) + actStart];\r
 259 \r
 260                 }\r
 261 \r
 262 void set320x240x256_X(void)\r
 263                 {\r
 264                 /* Set the unchained version of mode 13h: */\r
 265                 set320x200x256_X();\r
 266 \r
 267                 /* Modify the vertical sync polarity bits in the Misc. Output\r
 268                    Register to achieve square aspect ratio: */\r
 269                 outp(0x3C2, 0xE3);\r
 270 \r
 271                 /* Modify the vertical timing registers to reflect the increased\r
 272                    vertical resolution, and to center the image as good as\r
 273                    possible: */\r
 274                 outpw(0x3D4, 0x2C11);              /* turn off write protect */\r
 275                 outpw(0x3D4, 0x0D06);              /* vertical total */\r
 276                 outpw(0x3D4, 0x3E07);              /* overflow register */\r
 277                 outpw(0x3D4, 0xEA10);              /* vertical retrace start */\r
 278                 outpw(0x3D4, 0xAC11);              /* vertical retrace end AND wr.prot */\r
 279                 outpw(0x3D4, 0xDF12);              /* vertical display enable end */\r
 280                 outpw(0x3D4, 0xE715);              /* start vertical blanking */\r
 281                 outpw(0x3D4, 0x0616);              /* end vertical blanking */\r
 282 \r
 283                 /* Update mode info, so future operations are aware of the\r
 284                    resolution */\r
 285                 height = 240;\r
 286 \r
 287                 }\r
 288 \r
 289 \r
 290 /*-----------XXXX-------------*/\r
 291 /*tile*/\r
 292 void putColorBox_X(int x, int y, int w, int h, byte color) {\r
 293         outp(0x3c4, 0x02);\r
 294 \r
 295         int curx, cury;\r
 296         unsigned drawptr;\r
 297         for (curx=x; curx<(x+w); curx++) {\r
 298                 outp(0x3c5, 0x01 << (curx & 3));\r
 299                 drawptr = (unsigned)(widthBytes * y) + (curx / 4) + actStart;\r
 300                 for (cury=0; cury<h; cury++) {\r
 301                         vga[drawptr] = color;\r
 302                         drawptr += widthBytes;\r
 303                 }\r
 304         }\r
 305 }\r
 306 \r
 307 void vScroll(int rows)\r
 308 {\r
 309         // Scrolling = current start + (rows * bytes in a row)\r
 310         setVisibleStart(visStart + (rows * width));\r
 311 }\r
 312 \r
 313 void scrolly(int bong)\r
 314 {\r
 315         int boing=0;\r
 316         if(bong<0)\r
 317                 boing=-1;\r
 318         else if(bong>0)\r
 319                 boing=1;\r
 320 \r
 321         for(int ti=0;ti<TILEWH;ti++)\r
 322                 vScroll(boing);\r
 323 }\r
 324 \r
 325 /*\r
 326 \r
 327 \r
 328 To implement smooth horizontal scrolling, you would do the following:\r
 329 \r
 330 -------------- Horizontal Scrolling ------------\r
 331 FOR X = 0 TO 319 DO\r
 332   SET HPP TO ( X MOD 4 )\r
 333   SET VGA OFFSET TO ( X/4 )\r
 334 END FOR\r
 335 ------------------------------------------------\r
 336 \r
 337 Okay, no problem at all (although I think you might have to fiddle\r
 338 around with the HPP a bit to get it right...try different values and\r
 339 see what works :).\r
 340 \r
 341 So, the next problem is with drawing the images off the screen where\r
 342 they aren't visible and then scrolling them on!!! As it turns out,\r
 343 there's yet ANOTHER register to accomplish this. This one's called the\r
 344 offset register (no, not the one I was talking about before, that one\r
 345 was actually the "start address" register) and it's at\r
 346 \r
 347   PORT:     3D4H/3D5H\r
 348   OFFSET:   13H\r
 349 \r
 350 and here's how to use it\r
 351 \r
 352 -------------- Offset Register ---------------\r
 353 OUT 13H TO PORT 3D4H\r
 354 OUT value TO PORT 3D5H\r
 355 ----------------------------------------------\r
 356 \r
 357 Now, what my VGA reference says is that this register holds the number\r
 358 of bytes (not pixels) difference between the start address of each row.\r
 359 So, in X-mode it normally contains the value 80 (as we remember,\r
 360 80 bytes * 4 planes = 320 pixels). This register does not affect the\r
 361 VISIBLE width of the display, only the difference between addresses on\r
 362 each row.\r
 363 \r
 364 When we scroll horizontally, we need a little bit of extra working space\r
 365 so we can draw off the edge of the screen.\r
 366 \r
 367 Perhaps a little diagram will clarify it. The following picture is of a\r
 368 standard X-mode addressing scheme with the OFFSET register set to 80.\r
 369 \r
 370       ROW    OFFSET\r
 371       0         0 ========================\r
 372       1        80 [                      ]\r
 373       2       160 [                      ]\r
 374       ..       .. [       VISIBLE        ]\r
 375                   [        SCREEN        ]\r
 376                   [                      ]\r
 377                   [                      ]\r
 378       ..       .. [                      ]\r
 379       199   15920 ========================\r
 380 \r
 381 and the next diagram is of a modified addressing scheme with the OFFSET\r
 382 register set to 82 (to give us 4 extra pixels on each side of the screen)\r
 383 \r
 384 ROW    OFFSET\r
 385 0         0 ------========================------\r
 386 1        82 |   V [                      ]   V |\r
 387 2       164 |   I [                      ]   I |\r
 388 ..       .. | N S [      VISIBLE         ] N S |\r
 389             | O I [       SCREEN         ] O I |\r
 390             | T B [                      ] T B |\r
 391             |   L [                      ]   L |\r
 392 ..       .. |   E [                      ]   E |\r
 393 199   16318 ------========================------\r
 394 \r
 395 Beautiful!!!\r
 396 \r
 397 As with vertical scrolling, however, you still have the problem of when\r
 398 you reach the bottom of page 4...and it's fixed in the same manner.\r
 399 \r
 400 I haven't actually managed to get infinite horizontal scrolling working,\r
 401 but the method I have just stated will give you a horizontal scrolling\r
 402 range of over 200 screens!!!! So if you need more (which is extremely\r
 403 unlikely), figure it out yourself.\r
 404 \r
 405 \r
 406 ------------------\r
 407 COMBINED SCROLLING\r
 408 ------------------\r
 409 To do both horizontal and vertical scrolling, all you have to do is combine\r
 410 the two methods with a few little extras (it's always the way isn't it).\r
 411 \r
 412 You have to start off with the original screen on the current page and the\r
 413 next page as well. When you scroll horizontally, you have to draw the edge\r
 414 that's coming in to the screen to BOTH pages (that means you'll be drawing\r
 415 the incoming edge twice, once for each page). You do this so that when you\r
 416 have scrolled vertically down through a complete page, you can jump back\r
 417 to the first page and it will (hopefully) have an identical copy, and you\r
 418 can then continue scrolling again.\r
 419 \r
 420 I'm sorry about this being so confusing but it's a bit difficult to explain.\r
 421 \r
 422 \r
 423 */\r
 424 //---------------------------------------------------\r
 425 //\r
 426 // Use the bios to get the address of the 8x8 font\r
 427 //\r
 428 // You need a font if you are going to draw text.\r
 429 //\r
 430 /*\r
 431 int far *\r
 432 getFont()\r
 433 {\r
 434         union REGPACK rg;\r
 435         int seg;\r
 436         int off;\r
 437         memset(&rg, 0, sizeof(rg));\r
 438 \r
 439         rg.w.ax = 0x1130;\r
 440         rg.h.bh = 0x03;\r
 441         intr(0x10, &rg);\r
 442         seg = rg.w.es;\r
 443         off = rg.w.bp;\r
 444         \r
 445 \r
 446         return (int far *)MK_FP(seg, off);\r
 447 }\r
 448 \r
 449 void drawChar(int x, int y, int color, byte c)\r
 450 {\r
 451                 int i, j;\r
 452                 int mask;\r
 453                 int far *font = getFont() + (c * 8);\r
 454 \r
 455                 for (i = 0; i < 8; i++)\r
 456                 {\r
 457                                 mask = *font;\r
 458                                 for (j = 0; j < 8; j++)\r
 459                                 {\r
 460                                                 if (mask & 0x80)\r
 461                                                 {\r
 462                                                                 //pixel(x + j, y + i, color);\r
 463                                                                 putPixel_X(x + j, y + i, color);\r
 464                                                 }\r
 465                                                 mask <<= 1;\r
 466                                 }\r
 467                                 font++;\r
 468                 }\r
 469 }\r
 470 \r
 471 void drawText(int x, int y, int color, byte string)\r
 472 {\r
 473                 while (string)\r
 474                 {\r
 475                                 drawChar(x, y, color, string);\r
 476                                 x += 8;\r
 477                                 string++;\r
 478                 }\r
 479 }\r
 480 */\r
 481 /////////////////////////////////////////////////////////////////////////////\r
 482 //                                                                         //\r
 483 // setvideo() - This function Manages the video modes                                     //\r
 484 //                                                                         //\r
 485 /////////////////////////////////////////////////////////////////////////////\r
 486 void setvideo(/*byte mode, */int vq){\r
 487                 union REGS in, out;\r
 488 \r
 489                 if(!vq){ // deinit the video\r
 490                                 // change to the video mode we were in before we switched to mode 13h\r
 491                                 in.h.ah = 0x00;\r
 492                                 in.h.al = old_mode;\r
 493                                 int86(0x10, &in, &out);\r
 494 \r
 495                 }else if(vq == 1){ // init the video\r
 496                                 // get old video mode\r
 497                                 in.h.ah = 0xf;\r
 498                                 int86(0x10, &in, &out);\r
 499                                 old_mode = out.h.al;\r
 500 \r
 501                                 // enter mode\r
 502                                 set320x240x256_X();\r
 503                 }\r
 504 }\r
 505 \r
 506 /////////////////////////////////////////////////////////////////////////////\r
 507 //                                                                                                                                               //\r
 508 // cls() - This clears the screen to the specified color, on the VGA or on //\r
 509 //               the Virtual screen.                                                                                     //\r
 510 //                                                                                                                                               //\r
 511 /////////////////////////////////////////////////////////////////////////////\r
 512 void cls(byte color, byte *Where){\r
 513                 _fmemset(Where, color, width*(height*17));\r
 514 }\r
 515 \r
 516 //color \82Ä\82·\82Æ\r
 517 int colortest(){\r
 518                 if(gq < NUM_COLORS){\r
 519                                 cls(gq, vga);\r
 520                                 gq++;\r
 521                 }else gq = 0;\r
 522                 return gq;\r
 523 }\r
 524 \r
 525 //color \82Ä\82·\82Æ\r
 526 int colorz(){\r
 527                 if(gq < HGQ){\r
 528 //----            cls(gq, vaddr);\r
 529                                 cls(gq, vga);\r
 530                                 gq++;\r
 531                 }else gq = LGQ;\r
 532                 return gq;\r
 533 }\r
 534 \r
 535 //slow spectrum down\r
 536 void ssd(int svq){\r
 537                 if(sy < height+1){\r
 538                                 if(sx < width+1){\r
 539                                                 //plotpixel(xx, yy, coor, vga);\r
 540                                                 //ppf(sx, sy, coor, vga);\r
 541                                                 putPixel_X(sx, sy, coor);\r
 542                                                 //printf("%d %d %d %d\n", sx, sy, svq, coor);\r
 543                                                 sx++;\r
 544                                 }else sx = 0;\r
 545                                 if(sx == width){\r
 546                                                 sy++;\r
 547                                                 if(svq == 7) coor++;\r
 548                                                 if(sy == height && svq == 8) coor = rand()%NUM_COLORS;\r
 549                                 }\r
 550                 }else sy = 0;\r
 551 }\r
 552 \r
 553 /*-----------ding-------------*/\r
 554 int ding(int q){\r
 555 \r
 556 //      if(yy<height){\r
 557                 setActivePage(0);\r
 558                 setVisiblePage(0);\r
 559 /*      }\r
 560         if((height)<yy<(height*2)){\r
 561                 setActivePage(1);\r
 562                 setVisiblePage(1);\r
 563         }\r
 564         if((height*2)<yy<(height*3)){\r
 565                 setActivePage(2);\r
 566                 setVisiblePage(2);\r
 567         }*/\r
 568                 int d3y;\r
 569 \r
 570 //++++  if(q <= 4 && q!=2 && gq == BONK-1) coor = rand()%HGQ;\r
 571                 if((q == 2\r
 572                 ||q==4\r
 573                 ||q==16\r
 574                 ) && gq == BONK-1){\r
 575                                                 if(coor < HGQ && coor < LGQ) coor = LGQ;\r
 576                                                 if(coor < HGQ){\r
 577                                                                 coor++;\r
 578                                 }else{ coor = LGQ;\r
 579                                                 bakax = rand()%3; bakay = rand()%3;\r
 580                                 }\r
 581                 }\r
 582 \r
 583                 if(q == 8){ colorz(); return gq; }else\r
 584                 if(q == 10){ ssd(q); /*printf("%d\n", coor);*/ }else\r
 585                 if(q == 5){ colortest(); return gq; }else\r
 586                 if(q == 11){ colorz(); delay(100); return gq; }\r
 587                 if(q == 6){\r
 588                                 coor = rand()%NUM_COLORS;\r
 589 //----            cls(coor, vaddr);\r
 590                                 cls(coor, vga);\r
 591                                 //updatevbuff();\r
 592                 }\r
 593 \r
 594                 if(q == 7 || q== 9){\r
 595                                 if(gq < HGQ){\r
 596                                                 if(q == 7) ssd(q);\r
 597                                                 if(q == 9){ ssd(q); coor++; }\r
 598                                                 gq++;\r
 599                                 }else gq = LGQ;\r
 600                 }\r
 601                 if((q<5 && gq<BONK) || (q==16 && gq<BONK)){ // the number variable make the colors more noticable\r
 602                                 if(q==1){\r
 603                                                 if(xx==width){bakax=0;}\r
 604                                                 if(xx==0){bakax=1;}\r
 605                                                 if(yy==height){bakay=0;}\r
 606                                                 if(yy==0){bakay=1;}\r
 607                                 }else if(q==3){\r
 608                                                 if(xx!=width||yy!=height){\r
 609                                                                 if(xx==0){bakax=1;bakay=-1;d3y=1;}\r
 610                                                                 if(yy==0){bakax=1;bakay=0;d3y=1;}\r
 611                                                                 if(xx==width){bakax=-1;bakay=-1;d3y=1;}\r
 612                                                                 if(yy==height){bakax=1;bakay=0;d3y=1;}\r
 613                                                 }else if(xx==width&&yy==height) xx=yy=0;\r
 614                                 }\r
 615                                 if(q==3){\r
 616                                                 if(d3y){\r
 617                                                                 if(bakay<0){\r
 618                                                                                 yy--;\r
 619                                                                                 d3y--;\r
 620                                                                 }else\r
 621                                                                 if(bakay>0){\r
 622                                                                                 yy++;\r
 623                                                                                 d3y--;\r
 624                                                                 }\r
 625                                                 }\r
 626                                                 if(bakax<0){\r
 627                                                                 xx--;\r
 628                                                 }else\r
 629                                                 if(bakax>0){\r
 630                                                                 xx++;\r
 631                                                 }\r
 632                                 }else{\r
 633                                                 if(q==16)\r
 634                                                 {\r
 635                                                                 if(!bakax){\r
 636                                                                                 xx--;//=TILEWH;\r
 637                                                                 }else if(bakax>0){\r
 638                                                                                 xx++;//=TILEWH;\r
 639                                                                 }\r
 640                                                                 if(!bakay){\r
 641                                                                                 yy--;//=TILEWH;\r
 642                                                                 }else if(bakay>0){\r
 643                                                                                 yy++;//=TILEWH;\r
 644                                                                 }\r
 645                                                 }else{\r
 646                                                                 if(!bakax){\r
 647 //                                                                              xx-=TILEWH;\r
 648                                                                                 xx--;\r
 649                                                                 }else if(bakax>1){\r
 650 //                                                                              xx+=TILEWH;\r
 651                                                                                 xx++;\r
 652                                                                 }\r
 653                                                                 if(!bakay){\r
 654 //                                                                              yy-=TILEWH;\r
 655                                                                                 yy--;\r
 656                                                                 }else if(bakay>1){\r
 657 //                                                                              yy+=TILEWH;\r
 658                                                                                 yy++;\r
 659                                                                 }\r
 660                                                 }\r
 661                                 }\r
 662                                 // fixer\r
 663 //                              if(q!=16){\r
 664 //if(q!=16)\r
 665                                                 if(xx<(0/*-TILEWH*/)) xx=(width/*+TILEWH*/);\r
 666                                                 if(yy<0) yy=(height*3);\r
 667                                                 if(xx>(width/*+TILEWH*/)) xx=(0/*-TILEWH*/);\r
 668                                                 if(yy>(height*3)) yy=0;\r
 669 //                              }\r
 670 \r
 671 //interesting effects\r
 672                                 if(q==16)\r
 673                                 {\r
 674                                 int tx=0,ty=0;\r
 675                                 tx+=xx+16;\r
 676                                 ty+=yy+16;\r
 677                                 putPixel_X(tx, ty, coor);\r
 678                                 //drawrect(tx, ty, tx+TILEWH, ty+TILEWH, coor);\r
 679                                 //printf("%d %d %d %d %d %d\n", xx, yy, tx, ty, TILEWH);\r
 680 \r
 681                                 // plot the pixel\r
 682 //----            ppf(xx, yy, coor, vga);\r
 683                                 }else /*if(xx>=0 && xx<width && yy>=0 && yy<(height*3))*/{\r
 684 //                                      putColorBox_X(xx, yy, TILEWH, TILEWH, coor);\r
 685 //++++0000\r
 686                                         putPixel_X(xx, yy, coor);\r
 687                                 } \r
 688 \r
 689 //----            if(q==2) ppf(rand()%, rand()%height, 0, vga);\r
 690 //                              if(q==2) putColorBox_X(rand()%width, rand()%(height*3), TILEWH, TILEWH, 0);\r
 691 //++++0000\r
 692                                 if(q==2) putPixel_X(rand()%width, rand()%(height*3), 0);\r
 693                                 if(q==16) putPixel_X(rand()%width, rand()%(height*3), 0);\r
 694                                 if(q==2||q==4||q==16){ bakax = rand()%3; bakay = rand()%3; }\r
 695                                 gq++;\r
 696 //if(xx<0||xx>320||yy<0||yy>(height*3))\r
 697 //        printf("%d %d %d %d %d %d\n", xx, yy, coor, bakax, bakay, getPixel_X(xx,yy));\r
 698 //        printf("%d\n", getPixel_X(xx,yy));\r
 699 //0000\r
 700 //        drawText(0, 0, 15, getPixel_X(xx,yy));\r
 701                 }else gq = LGQ;\r
 702                 return gq;\r
 703 }\r
 704 \r
 705 \r
 706 /*\r
 707  * The library testing routines follows below.\r
 708  */\r
 709 \r
 710 \r
 711 #ifdef TESTING\r
 712 \r
 713 #include <stdio.h>\r
 714 #include <conio.h>\r
 715 \r
 716 void doTest(void)\r
 717                 {\r
 718                 int p, x, y, pages;\r
 719 \r
 720                 /* This is the way to calculate the number of pages available. */\r
 721                 pages = 65536L/(widthBytes*height); // apparently this takes the A000 address\r
 722 \r
 723                 printf("%d\n", pages);\r
 724 \r
 725                 for (p = 0; p <= pages; ++p)\r
 726                                 {\r
 727                                 setActivePage(p);\r
 728 \r
 729                                 /* On each page draw a single colored border, and dump the palette\r
 730                                    onto a small square about the middle of the page. */\r
 731 \r
 732                                    //{\r
 733                                                 for (x = 0; x <= width; ++x)\r
 734                                                                 {\r
 735                                                                 putPixel_X(x, 0, p+1);\r
 736                                                                 if(p!=pages) putPixel_X(x, height-1, p+1);\r
 737                                                                                 else putPixel_X(x, 99-1, p+1);\r
 738                                                                 }\r
 739 \r
 740                                                 for (y = 0; y <= height; ++y)\r
 741                                                                 {\r
 742                                                                 putPixel_X(0, y, p+1);\r
 743                                                                 if(p!=pages) putPixel_X(width-1, y, p+1);\r
 744                                                                                 else putPixel_X(width-1, y, p+1);\r
 745                                                                 }\r
 746 \r
 747                                                 for (x = 0; x < 16; ++x)\r
 748                                                                 for (y = 0; y < 16; ++y)\r
 749                                                                                 putPixel_X(x+(p+2)*16, y+(p+2)*16, x + y*16);\r
 750                                                 //}\r
 751 \r
 752 //                              drawText(0, 0, 15, p);\r
 753 \r
 754                                 }\r
 755 \r
 756                 /* Each pages will now contain a different image.  Let the user cycle\r
 757                    through all the pages by pressing a key. */\r
 758                 for (p = 0; p <= pages; ++p)\r
 759                                 {\r
 760                                 setVisiblePage(p);\r
 761                                 //drawText(0, 240, 15, "bakapi");\r
 762                                 getch();\r
 763                                 }\r
 764 \r
 765                 }\r
 766 \r
 767 /*\r
 768  * Library test (program) entry point.\r
 769  */\r
 770 \r
 771 int main(void)\r
 772                 {\r
 773                 int key,d;\r
 774                 // main variables\r
 775                 d=1; // switch variable\r
 776                 key=4; // default screensaver number\r
 777 //        puts("First, have a look at the 320x200 mode.  I will draw some rubbish");\r
 778 //        puts("on all of the four pages, then let you cycle through them by");\r
 779 //        puts("hitting a key on each page.");\r
 780 //        puts("Press a key when ready...");\r
 781 //        getch();\r
 782 \r
 783 //        doTest();\r
 784 \r
 785 //        puts("Then, check out Mode X, 320x240 with 3 (and a half) pages.");\r
 786 //        puts("Press a key when ready...");\r
 787 //        getch();\r
 788 \r
 789 //++++0000\r
 790                 setvideo(1);\r
 791 //mxInit();\r
 792 // screen savers\r
 793 \r
 794 /*while(d!=0){ // on!\r
 795                                 if(!kbhit()){ // conditions of screen saver\r
 796                                                 ding(key);\r
 797                                 }else{\r
 798                                                 setvideo(0);\r
 799                                                 // user imput switch\r
 800                                                 printf("Enter 1, 2, 3, 4, or 6 to run a screensaver, or enter 5 to quit.\n", getch());  // prompt the user\r
 801                                                 scanf("%d", &key);\r
 802                                                 //if(key==3){xx=yy=0;} // crazy screen saver wwww\r
 803                                                 if(key==5) d=0;\r
 804                                                 setvideo(1);\r
 805                                 }\r
 806                 }*/ // else off\r
 807                 while(!kbhit()){ // conditions of screen saver\r
 808                         ding(4);\r
 809                 }\r
 810                 //end of screen savers\r
 811                 doTest();\r
 812 \r
 813                 while(!kbhit()){ // conditions of screen saver\r
 814                         vScroll(-1);\r
 815                 }\r
 816 //++++0000\r
 817                 setvideo(0);\r
 818 //mxTerm();\r
 819 //mxGetVersion();\r
 820                 puts("Where to next?  It's your move! wwww");\r
 821                 printf("bakapi ver. 1.04.09.02\nis made by sparky4\81i\81\86\83Ö\81\85\81j feel free to use it ^^\nLicence: GPL v2\n");\r
 822                 return 0;\r
 823                 }\r
 824 \r
 825 #endif\r