Shamusworld >> Repos - virtualjaguar/blob - src/objectp.cpp

   1 //
   2 // Object Processor
   3 //
   4 // Original source by Cal2
   5 // GCC/SDL port by Niels Wagenaar (Linux/WIN32) and Caz (BeOS)
   6 // Extensive cleanups/fixes/rewrites by James L. Hammons
   7 //
   8
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include "jaguar.h"
  13
  14 //#define OP_DEBUG
  15 //#define OP_DEBUG_BMP
  16
  17 #define BLEND_Y(dst, src)       op_blend_y[(((uint16)dst<<8)) | ((uint16)(src))]
  18 #define BLEND_CR(dst, src)      op_blend_cr[(((uint16)dst)<<8) | ((uint16)(src))]
  19
  20 #define OBJECT_TYPE_BITMAP      0                       // 000
  21 #define OBJECT_TYPE_SCALE       1                       // 001
  22 #define OBJECT_TYPE_GPU         2                       // 010
  23 #define OBJECT_TYPE_BRANCH      3                       // 011
  24 #define OBJECT_TYPE_STOP        4                       // 100
  25
  26 #define CONDITION_EQUAL                         0
  27 #define CONDITION_LESS_THAN                     1
  28 #define CONDITION_GREATER_THAN          2
  29 #define CONDITION_OP_FLAG_SET           3
  30 #define CONDITION_SECOND_HALF_LINE      4
  31
  32 #define OPFLAG_RELEASE          8                       // Bus release bit
  33 #define OPFLAG_TRANS            4                       // Transparency bit
  34 #define OPFLAG_RMW                      2                       // Read-Modify-Write bit
  35 #define OPFLAG_REFLECT          1                       // Horizontal mirror bit
  36
  37 // Private function prototypes
  38
  39 void OPProcessFixedBitmap(uint64 p0, uint64 p1, bool render);
  40 void OPProcessScaledBitmap(uint64 p0, uint64 p1, uint64 p2, bool render);
  41 void DumpScaledObject(uint64 p0, uint64 p1, uint64 p2);
  42 void DumpFixedObject(uint64 p0, uint64 p1);
  43 uint64 op_load_phrase(uint32 offset);
  44
  45 // Local global variables
  46
  47 static uint8 * op_blend_y;
  48 static uint8 * op_blend_cr;
  49 // There may be a problem with this "RAM" overlapping (and thus being independent of)
  50 // some of the regular TOM RAM...
  51 static uint8 objectp_ram[0x40];                 // This is based at $F00000
  52 uint8 objectp_running;
  53 //bool objectp_stop_reading_list;
  54
  55 static uint8 op_bitmap_bit_depth[8] = { 1, 2, 4, 8, 16, 24, 32, 0 };
  56 //static uint32 op_bitmap_bit_size[8] =
  57 //      { (uint32)(0.125*65536), (uint32)(0.25*65536), (uint32)(0.5*65536), (uint32)(1*65536),
  58 //        (uint32)(2*65536),     (uint32)(1*65536),    (uint32)(1*65536),   (uint32)(1*65536) };
  59 static uint32 op_pointer;
  60
  61 int32 phraseWidthToPixels[8] = { 64, 32, 16, 8, 4, 2, 0, 0 };
  62
  63
  64 //
  65 // Object Processor initialization
  66 //
  67 void op_init(void)
  68 {
  69         // Blend tables (64K each)
  70         memory_malloc_secure((void **)&op_blend_y, 0x10000, "Jaguar Object processor Y blend lookup table");
  71         memory_malloc_secure((void **)&op_blend_cr, 0x10000, "Jaguar Object processor CR blend lookup table");
  72
  73         // Here we calculate the saturating blend of a signed 4-bit value and an
  74         // existing Cyan/Red value as well as a signed 8-bit value and an existing intensity...
  75         // Note: CRY is 4 bits Cyan, 4 bits Red, 16 bits intensitY
  76         for(int i=0; i<256*256; i++)
  77         {
  78                 int y = (i >> 8) & 0xFF;
  79                 int dy = (INT8)i;                                       // Sign extend the Y index
  80                 int c1 = (i >> 8) & 0x0F;
  81                 int dc1 = (INT8)(i << 4) >> 4;          // Sign extend the R index
  82                 int c2 = (i >> 12) & 0x0F;
  83                 int dc2 = (INT8)(i & 0xF0) >> 4;        // Sign extend the C index
  84
  85                 y += dy;
  86                 if (y < 0)
  87                         y = 0;
  88                 else if (y > 0xFF)
  89                         y = 0xFF;
  90                 op_blend_y[i] = y;
  91
  92                 c1 += dc1;
  93                 if (c1 < 0)
  94                         c1 = 0;
  95                 else if (c1 > 0x0F)
  96                         c1 = 0x0F;
  97                 c2 += dc2;
  98
  99                 if (c2 < 0)
 100                         c2 = 0;
 101                 else if (c2 > 0x0F)
 102                         c2 = 0x0F;
 103                 op_blend_cr[i] = (c2 << 4) | c1;
 104         }
 105
 106         op_reset();
 107 }
 108
 109 //
 110 // Object Processor reset
 111 //
 112 void op_reset(void)
 113 {
 114         memset(objectp_ram, 0x00, 0x40);
 115         objectp_running = 0;
 116 }
 117
 118 void op_done(void)
 119 {
 120         char * opType[8] =
 121         { "(BITMAP)", "(SCALED BITMAP)", "(GPU INT)", "(BRANCH)", "(STOP)", "???", "???", "???" };
 122         char * ccType[8] =
 123                 { "\"==\"", "\"<\"", "\">\"", "(opflag set)", "(second half line)", "?", "?", "?" };
 124
 125         uint32 olp = op_get_list_pointer();
 126         WriteLog("OP: OLP = %08X\n", olp);
 127         WriteLog("OP: Phrase dump\n    ----------\n");
 128         for(uint32 i=0; i<0x100; i+=8)
 129         {
 130                 uint32 hi = JaguarReadLong(olp + i, OP), lo = JaguarReadLong(olp + i + 4, OP);
 131                 WriteLog("\t%08X: %08X %08X %s", olp + i, hi, lo, opType[lo & 0x07]);
 132                 if ((lo & 0x07) == 3)
 133                 {
 134                         uint16 ypos = (lo >> 3) & 0x7FF;
 135                         uint8  cc   = (lo >> 14) & 0x03;
 136                         uint32 link = ((hi << 11) | (lo >> 21)) & 0x3FFFF8;
 137                         WriteLog(" YPOS=%u, CC=%s, link=%08X", ypos, ccType[cc], link);
 138                 }
 139                 WriteLog("\n");
 140                 if ((lo & 0x07) == 0)
 141                         DumpFixedObject(op_load_phrase(olp+i), op_load_phrase(olp+i+8));
 142                 if ((lo & 0x07) == 1)
 143                         DumpScaledObject(op_load_phrase(olp+i), op_load_phrase(olp+i+8), op_load_phrase(olp+i+16));
 144         }
 145         WriteLog("\n");
 146 }
 147
 148 //
 149 // Object Processor memory access
 150 // Memory range: F00010 - F00027
 151 //
 152 //      F00010-F00017   R     xxxxxxxx xxxxxxxx   OB - current object code from the graphics processor
 153 //      F00020-F00023     W   xxxxxxxx xxxxxxxx   OLP - start of the object list
 154 //      F00026            W   -------- -------x   OBF - object processor flag
 155 //
 156
 157 uint8 OPReadByte(uint32 offset, uint32 who/*=UNKNOWN*/)
 158 {
 159         offset &= 0x3F;
 160         return objectp_ram[offset];
 161 }
 162
 163 uint16 OPReadWord(uint32 offset, uint32 who/*=UNKNOWN*/)
 164 {
 165         offset &= 0x3F;
 166         return GET16(objectp_ram, offset);
 167 }
 168
 169 void OPWriteByte(uint32 offset, uint8 data, uint32 who/*=UNKNOWN*/)
 170 {
 171         offset &= 0x3F;
 172         objectp_ram[offset] = data;
 173 }
 174
 175 void OPWriteWord(uint32 offset, uint16 data, uint32 who/*=UNKNOWN*/)
 176 {
 177         offset &= 0x3F;
 178         SET16(objectp_ram, offset, data);
 179
 180 /*if (offset == 0x20)
 181 WriteLog("OP: Setting lo list pointer: %04X\n", data);
 182 if (offset == 0x22)
 183 WriteLog("OP: Setting hi list pointer: %04X\n", data);//*/
 184 }
 185
 186 uint32 op_get_list_pointer(void)
 187 {
 188         // Note: This register is LO / HI WORD, hence the funky look of this...
 189 //      return (objectp_ram[0x22] << 24) | (objectp_ram[0x23] << 16) | (objectp_ram[0x20] << 8) | objectp_ram[0x21];
 190         return GET16(objectp_ram, 0x20) | (GET16(objectp_ram, 0x22) << 16);
 191 }
 192
 193 // This is WRONG, since the OBF is only 16 bits wide!!! [FIXED]
 194
 195 uint32 op_get_status_register(void)
 196 {
 197 //      return (objectp_ram[0x26] << 24) | (objectp_ram[0x27] << 16) | (objectp_ram[0x28] << 8) | objectp_ram[0x29];
 198 //      return GET32(objectp_ram, 0x26);
 199         return GET16(objectp_ram, 0x26);
 200 }
 201
 202 // This is WRONG, since the OBF is only 16 bits wide!!! [FIXED]
 203
 204 void op_set_status_register(uint32 data)
 205 {
 206 /*      objectp_ram[0x26] = (data & 0xFF000000) >> 24;
 207         objectp_ram[0x27] = (data & 0x00FF0000) >> 16;
 208         objectp_ram[0x28] = (data & 0x0000FF00) >> 8;
 209         objectp_ram[0x29] |= (data & 0xFE);*/
 210         objectp_ram[0x26] = (data & 0x0000FF00) >> 8;
 211         objectp_ram[0x27] |= (data & 0xFE);
 212 }
 213
 214 void op_set_current_object(uint64 object)
 215 {
 216 //Not sure this is right... Wouldn't it just be stored 64 bit BE?
 217         // Stored as least significant 32 bits first, ms32 last in big endian
 218 /*      objectp_ram[0x13] = object & 0xFF; object >>= 8;
 219         objectp_ram[0x12] = object & 0xFF; object >>= 8;
 220         objectp_ram[0x11] = object & 0xFF; object >>= 8;
 221         objectp_ram[0x10] = object & 0xFF; object >>= 8;
 222
 223         objectp_ram[0x17] = object & 0xFF; object >>= 8;
 224         objectp_ram[0x16] = object & 0xFF; object >>= 8;
 225         objectp_ram[0x15] = object & 0xFF; object >>= 8;
 226         objectp_ram[0x14] = object & 0xFF;*/
 227 // Let's try regular good old big endian...
 228         objectp_ram[0x17] = object & 0xFF; object >>= 8;
 229         objectp_ram[0x16] = object & 0xFF; object >>= 8;
 230         objectp_ram[0x15] = object & 0xFF; object >>= 8;
 231         objectp_ram[0x14] = object & 0xFF; object >>= 8;
 232
 233         objectp_ram[0x13] = object & 0xFF; object >>= 8;
 234         objectp_ram[0x12] = object & 0xFF; object >>= 8;
 235         objectp_ram[0x11] = object & 0xFF; object >>= 8;
 236         objectp_ram[0x10] = object & 0xFF;
 237 }
 238
 239 uint64 op_load_phrase(uint32 offset)
 240 {
 241         offset &= ~0x07;                                                // 8 byte alignment
 242         return ((uint64)JaguarReadLong(offset, OP) << 32) | (uint64)JaguarReadLong(offset+4, OP);
 243 }
 244
 245 void OPStorePhrase(uint32 offset, uint64 p)
 246 {
 247         offset &= ~0x07;                                                // 8 byte alignment
 248         JaguarWriteLong(offset, p >> 32, OP);
 249         JaguarWriteLong(offset + 4, p & 0xFFFFFFFF, OP);
 250 }
 251
 252 //
 253 // Debugging routines
 254 //
 255 void DumpScaledObject(uint64 p0, uint64 p1, uint64 p2)
 256 {
 257         WriteLog(" (SCALED BITMAP)");
 258         WriteLog(" %08X --> phrase %08X %08X\n", op_pointer, (uint32)(p1>>32), (uint32)(p1&0xFFFFFFFF));
 259         WriteLog("                 %08X --> phrase %08X %08X ", op_pointer+8, (uint32)(p2>>32), (uint32)(p2&0xFFFFFFFF));
 260         uint8 bitdepth = (p1 >> 12) & 0x07;
 261         int16 ypos = ((p0 >> 3) & 0x3FF);                       // ??? What if not interlaced (/2)?
 262         int32 xpos = p1 & 0xFFF;
 263         xpos = (xpos & 0x800 ? xpos | 0xFFFFF000 : xpos);
 264         uint32 iwidth = ((p1 >> 28) & 0x3FF);
 265         uint32 dwidth = ((p1 >> 18) & 0x3FF);           // Unsigned!
 266         uint16 height = ((p0 >> 14) & 0x3FF);
 267         uint32 link = ((p0 >> 24) & 0x7FFFF) << 3;
 268         uint32 ptr = ((p0 >> 43) & 0x1FFFFF) << 3;
 269         uint32 firstPix = (p1 >> 49) & 0x3F;
 270         uint8 flags = (p1 >> 45) & 0x0F;
 271         uint8 idx = (p1 >> 38) & 0x7F;
 272         uint32 pitch = (p1 >> 15) & 0x07;
 273         WriteLog("\n    [%u (%u) x %u @ (%i, %u) (%u bpp), l: %08X, p: %08X fp: %02X, fl:%s%s%s%s, idx:%02X, pt:%02X]\n",
 274                 iwidth, dwidth, height, xpos, ypos, op_bitmap_bit_depth[bitdepth], link, ptr, firstPix, (flags&OPFLAG_REFLECT ? "REFLECT " : ""), (flags&OPFLAG_RMW ? "RMW " : ""), (flags&OPFLAG_TRANS ? "TRANS " : ""), (flags&OPFLAG_RELEASE ? "RELEASE" : ""), idx, pitch);
 275         uint32 hscale = p2 & 0xFF;
 276         uint32 vscale = (p2 >> 8) & 0xFF;
 277         uint32 remainder = (p2 >> 16) & 0xFF;
 278         WriteLog("    [hsc: %02X, vsc: %02X, rem: %02X]\n", hscale, vscale, remainder);
 279 }
 280
 281 void DumpFixedObject(uint64 p0, uint64 p1)
 282 {
 283         WriteLog(" (BITMAP)");
 284         WriteLog(" %08X --> phrase %08X %08X\n", op_pointer, (uint32)(p1>>32), (uint32)(p1&0xFFFFFFFF));
 285         uint8 bitdepth = (p1 >> 12) & 0x07;
 286         int16 ypos = ((p0 >> 3) & 0x3FF);                       // ??? What if not interlaced (/2)?
 287         int32 xpos = p1 & 0xFFF;
 288         xpos = (xpos & 0x800 ? xpos | 0xFFFFF000 : xpos);
 289         uint32 iwidth = ((p1 >> 28) & 0x3FF);
 290         uint32 dwidth = ((p1 >> 18) & 0x3FF);           // Unsigned!
 291         uint16 height = ((p0 >> 14) & 0x3FF);
 292         uint32 link = ((p0 >> 24) & 0x7FFFF) << 3;
 293         uint32 ptr = ((p0 >> 43) & 0x1FFFFF) << 3;
 294         uint32 firstPix = (p1 >> 49) & 0x3F;
 295         uint8 flags = (p1 >> 45) & 0x0F;
 296         uint8 idx = (p1 >> 38) & 0x7F;
 297         uint32 pitch = (p1 >> 15) & 0x07;
 298         WriteLog("    [%u (%u) x %u @ (%i, %u) (%u bpp), l: %08X, p: %08X fp: %02X, fl:%s%s%s%s, idx:%02X, pt:%02X]\n",
 299                 iwidth, dwidth, height, xpos, ypos, op_bitmap_bit_depth[bitdepth], link, ptr, firstPix, (flags&OPFLAG_REFLECT ? "REFLECT " : ""), (flags&OPFLAG_RMW ? "RMW " : ""), (flags&OPFLAG_TRANS ? "TRANS " : ""), (flags&OPFLAG_RELEASE ? "RELEASE" : ""), idx, pitch);
 300 }
 301
 302 //
 303 // Object Processor main routine
 304 //
 305 //Need to fix this so that when an GPU object IRQ happens, we can pick up OP processing
 306 //where we left off. !!! FIX !!!
 307 void OPProcessList(int scanline, bool render)
 308 {
 309 extern int op_start_log;
 310 //      char * condition_to_str[8] =
 311 //              { "==", "<", ">", "(opflag set)", "(second half line)", "?", "?", "?" };
 312
 313         op_pointer = op_get_list_pointer();
 314
 315 //      objectp_stop_reading_list = false;
 316
 317 // *** BEGIN OP PROCESSOR TESTING ONLY ***
 318 extern bool interactiveMode;
 319 extern bool iToggle;
 320 extern int objectPtr;
 321 bool inhibit;
 322 int bitmapCounter = 0;
 323 // *** END OP PROCESSOR TESTING ONLY ***
 324
 325 //      if (op_pointer) WriteLog(" new op list at 0x%.8x scanline %i\n",op_pointer,scanline);
 326         while (op_pointer)
 327         {
 328 // *** BEGIN OP PROCESSOR TESTING ONLY ***
 329 if (interactiveMode && bitmapCounter == objectPtr)
 330         inhibit = iToggle;
 331 else
 332         inhibit = false;
 333 // *** END OP PROCESSOR TESTING ONLY ***
 334 //              if (objectp_stop_reading_list)
 335 //                      return;
 336
 337                 uint64 p0 = op_load_phrase(op_pointer);
 338                 op_pointer += 8;
 339 if (scanline == tom_get_vdb() + 1 && op_start_log)
 340 //if (scanline == 215 && op_start_log)
 341 {
 342 WriteLog("%08X --> phrase %08X %08X", op_pointer - 8, (int)(p0>>32), (int)(p0&0xFFFFFFFF));
 343 if ((p0 & 0x07) == OBJECT_TYPE_BITMAP)
 344 {
 345 WriteLog(" (BITMAP) ");
 346 uint64 p1 = op_load_phrase(op_pointer);
 347 WriteLog("\n%08X --> phrase %08X %08X ", op_pointer, (int)(p1>>32), (int)(p1&0xFFFFFFFF));
 348         uint8 bitdepth = (p1 >> 12) & 0x07;
 349         int16 ypos = ((p0 >> 3) & 0x3FF);                       // ??? What if not interlaced (/2)?
 350 int32 xpos = p1 & 0xFFF;
 351 xpos = (xpos & 0x800 ? xpos | 0xFFFFF000 : xpos);
 352         uint32 iwidth = ((p1 >> 28) & 0x3FF);
 353         uint32 dwidth = ((p1 >> 18) & 0x3FF);           // Unsigned!
 354         uint16 height = ((p0 >> 14) & 0x3FF);
 355         uint32 link = ((p0 >> 24) & 0x7FFFF) << 3;
 356         uint32 ptr = ((p0 >> 43) & 0x1FFFFF) << 3;
 357         uint32 firstPix = (p1 >> 49) & 0x3F;
 358         uint8 flags = (p1 >> 45) & 0x0F;
 359         uint8 idx = (p1 >> 38) & 0x7F;
 360         uint32 pitch = (p1 >> 15) & 0x07;
 361 WriteLog("\n    [%u (%u) x %u @ (%i, %u) (%u bpp), l: %08X, p: %08X fp: %02X, fl:%s%s%s%s, idx:%02X, pt:%02X]\n",
 362         iwidth, dwidth, height, xpos, ypos, op_bitmap_bit_depth[bitdepth], link, ptr, firstPix, (flags&OPFLAG_REFLECT ? "REFLECT " : ""), (flags&OPFLAG_RMW ? "RMW " : ""), (flags&OPFLAG_TRANS ? "TRANS " : ""), (flags&OPFLAG_RELEASE ? "RELEASE" : ""), idx, pitch);
 363 }
 364 if ((p0 & 0x07) == OBJECT_TYPE_SCALE)
 365 {
 366 WriteLog(" (SCALED BITMAP)");
 367 uint64 p1 = op_load_phrase(op_pointer), p2 = op_load_phrase(op_pointer+8);
 368 WriteLog("\n%08X --> phrase %08X %08X ", op_pointer, (int)(p1>>32), (int)(p1&0xFFFFFFFF));
 369 WriteLog("\n%08X --> phrase %08X %08X ", op_pointer+8, (int)(p2>>32), (int)(p2&0xFFFFFFFF));
 370         uint8 bitdepth = (p1 >> 12) & 0x07;
 371         int16 ypos = ((p0 >> 3) & 0x3FF);                       // ??? What if not interlaced (/2)?
 372 int32 xpos = p1 & 0xFFF;
 373 xpos = (xpos & 0x800 ? xpos | 0xFFFFF000 : xpos);
 374         uint32 iwidth = ((p1 >> 28) & 0x3FF);
 375         uint32 dwidth = ((p1 >> 18) & 0x3FF);           // Unsigned!
 376         uint16 height = ((p0 >> 14) & 0x3FF);
 377         uint32 link = ((p0 >> 24) & 0x7FFFF) << 3;
 378         uint32 ptr = ((p0 >> 43) & 0x1FFFFF) << 3;
 379         uint32 firstPix = (p1 >> 49) & 0x3F;
 380         uint8 flags = (p1 >> 45) & 0x0F;
 381         uint8 idx = (p1 >> 38) & 0x7F;
 382         uint32 pitch = (p1 >> 15) & 0x07;
 383 WriteLog("\n    [%u (%u) x %u @ (%i, %u) (%u bpp), l: %08X, p: %08X fp: %02X, fl:%s%s%s%s, idx:%02X, pt:%02X]\n",
 384         iwidth, dwidth, height, xpos, ypos, op_bitmap_bit_depth[bitdepth], link, ptr, firstPix, (flags&OPFLAG_REFLECT ? "REFLECT " : ""), (flags&OPFLAG_RMW ? "RMW " : ""), (flags&OPFLAG_TRANS ? "TRANS " : ""), (flags&OPFLAG_RELEASE ? "RELEASE" : ""), idx, pitch);
 385         uint32 hscale = p2 & 0xFF;
 386         uint32 vscale = (p2 >> 8) & 0xFF;
 387         uint32 remainder = (p2 >> 16) & 0xFF;
 388 WriteLog("    [hsc: %02X, vsc: %02X, rem: %02X]\n", hscale, vscale, remainder);
 389 }
 390 if ((p0 & 0x07) == OBJECT_TYPE_GPU)
 391 WriteLog(" (GPU)\n");
 392 if ((p0 & 0x07) == OBJECT_TYPE_BRANCH)
 393 {
 394 WriteLog(" (BRANCH)\n");
 395 uint8 * jaguar_mainRam = GetRamPtr();
 396 WriteLog("[RAM] --> ");
 397 for(int k=0; k<8; k++)
 398         WriteLog("%02X ", jaguar_mainRam[op_pointer-8 + k]);
 399 WriteLog("\n");
 400 }
 401 if ((p0 & 0x07) == OBJECT_TYPE_STOP)
 402 WriteLog("    --> List end\n");
 403 }//*/
 404
 405 //              WriteLog("%08X type %i\n", op_pointer, (uint8)p0 & 0x07);
 406                 switch ((uint8)p0 & 0x07)
 407                 {
 408                 case OBJECT_TYPE_BITMAP:
 409                 {
 410                         uint16 ypos = (p0 >> 3) & 0x3FF;
 411 // This is only theory implied by Rayman...!
 412 // It seems that if the YPOS is zero, then bump the YPOS value so that it coincides with
 413 // the VDB value. With interlacing, this would be slightly more tricky.
 414 // There's probably another bit somewhere that enables this mode--but so far, doesn't seem
 415 // to affect any other game in a negative way (that I've seen).
 416 // Either that, or it's an undocumented bug...
 417
 418 //No, the reason this was needed is that the OP code before was wrong. Any value
 419 //less than VDB will get written to the top line of the display!
 420 //                      if (ypos == 0)
 421 //                              ypos = TOMReadWord(0xF00046, OP) / 2;                   // Get the VDB value
 422                         uint32 height = (p0 & 0xFFC000) >> 14;
 423                         uint32 oldOPP = op_pointer - 8;
 424 // *** BEGIN OP PROCESSOR TESTING ONLY ***
 425 if (inhibit && op_start_log)
 426         WriteLog("!!! ^^^ This object is INHIBITED! ^^^ !!!\n");
 427 bitmapCounter++;
 428 if (!inhibit)   // For OP testing only!
 429 // *** END OP PROCESSOR TESTING ONLY ***
 430                         if (scanline >= ypos && height > 0)
 431                         {
 432                                 uint64 p1 = op_load_phrase(op_pointer);
 433                                 op_pointer += 8;
 434 //WriteLog("OP: Writing scanline %d with ypos == %d...\n", scanline, ypos);
 435 //WriteLog("--> Writing %u BPP bitmap...\n", op_bitmap_bit_depth[(p1 >> 12) & 0x07]);
 436 //                              OPProcessFixedBitmap(scanline, p0, p1, render);
 437                                 OPProcessFixedBitmap(p0, p1, render);
 438
 439                                 // OP write-backs
 440
 441 //???Does this really happen??? Doesn't seem to work if you do this...!
 442 //Probably not. Must be a bug in the documentation...!
 443 //                              uint32 link = (p0 & 0x7FFFF000000) >> 21;
 444 //                              SET16(objectp_ram, 0x20, link & 0xFFFF);        // OLP
 445 //                              SET16(objectp_ram, 0x22, link >> 16);
 446 /*                              uint32 height = (p0 & 0xFFC000) >> 14;
 447                                 if (height - 1 > 0)
 448                                         height--;*/
 449                                 // NOTE: Would subtract 2 if in interlaced mode...!
 450 //                              uint64 height = ((p0 & 0xFFC000) - 0x4000) & 0xFFC000;
 451 //                              if (height)
 452                                         height--;
 453
 454                                 uint64 data = (p0 & 0xFFFFF80000000000) >> 40;
 455                                 uint64 dwidth = (p1 & 0xFFC0000) >> 15;
 456                                 data += dwidth;
 457
 458                                 p0 &= ~0xFFFFF80000FFC000;                      // Mask out old data...
 459                                 p0 |= (uint64)height << 14;
 460                                 p0 |= data << 40;
 461                                 OPStorePhrase(oldOPP, p0);
 462                         }
 463                         op_pointer = (p0 & 0x000007FFFF000000) >> 21;
 464                         break;
 465                 }
 466                 case OBJECT_TYPE_SCALE:
 467                 {
 468                         uint16 ypos = (p0 >> 3) & 0x3FF;
 469                         uint32 height = (p0 & 0xFFC000) >> 14;
 470                         uint32 oldOPP = op_pointer - 8;
 471 // *** BEGIN OP PROCESSOR TESTING ONLY ***
 472 if (inhibit && op_start_log)
 473 {
 474         WriteLog("!!! ^^^ This object is INHIBITED! ^^^ !!! (scanline=%u, ypos=%u, height=%u)\n", scanline, ypos, height);
 475         DumpScaledObject(p0, op_load_phrase(op_pointer), op_load_phrase(op_pointer+8));
 476 }
 477 bitmapCounter++;
 478 if (!inhibit)   // For OP testing only!
 479 // *** END OP PROCESSOR TESTING ONLY ***
 480                         if (scanline >= ypos && height > 0)
 481                         {
 482                                 uint64 p1 = op_load_phrase(op_pointer);
 483                                 op_pointer += 8;
 484                                 uint64 p2 = op_load_phrase(op_pointer);
 485                                 op_pointer += 8;
 486 //WriteLog("OP: %08X (%d) %08X%08X %08X%08X %08X%08X\n", oldOPP, scanline, (uint32)(p0>>32), (uint32)(p0&0xFFFFFFFF), (uint32)(p1>>32), (uint32)(p1&0xFFFFFFFF), (uint32)(p2>>32), (uint32)(p2&0xFFFFFFFF));
 487                                 OPProcessScaledBitmap(p0, p1, p2, render);
 488
 489                                 // OP write-backs
 490
 491                                 uint8 remainder = p2 >> 16, vscale = p2 >> 8;
 492 //Actually, we should skip this object if it has a vscale of zero.
 493 //Or do we? Not sure... Atari Karts has a few lines that look like:
 494 // (SCALED BITMAP)
 495 //000E8268 --> phrase 00010000 7000B00D
 496 //    [7 (0) x 1 @ (13, 0) (8 bpp), l: 000E82A0, p: 000E0FC0 fp: 00, fl:RELEASE, idx:00, pt:01]
 497 //    [hsc: 9A, vsc: 00, rem: 00]
 498 // Could it be the vscale is overridden if the DWIDTH is zero? Hmm...
 499
 500                                 if (vscale == 0)
 501                                         vscale = 0x20;                                  // OP bug??? Nope, it isn't...! Or is it?
 502
 503                                 remainder -= 0x20;                                      // 1.0f in [3.5] fixed point format
 504 //                              if (remainder & 0x80)                           // I.e., it's negative
 505                                 if ((remainder & 0x80) || remainder == 0)       // I.e., it's <= 0
 506                                 {
 507                                         uint64 data = (p0 & 0xFFFFF80000000000) >> 40;
 508                                         uint64 dwidth = (p1 & 0xFFC0000) >> 15;
 509
 510 //                                      while (remainder & 0x80)
 511                                         while ((remainder & 0x80) || remainder == 0)
 512                                         {
 513                                                 remainder += vscale;
 514                                                 if (height)
 515                                                         height--;
 516
 517                                                 data += dwidth;
 518                                         }
 519                                         p0 &= ~0xFFFFF80000FFC000;              // Mask out old data...
 520                                         p0 |= (uint64)height << 14;
 521                                         p0 |= data << 40;
 522                                         OPStorePhrase(oldOPP, p0);
 523                                 }
 524
 525 //WriteLog(" [%08X%08X -> ", (uint32)(p2>>32), (uint32)(p2&0xFFFFFFFF));
 526                                 p2 &= ~0x0000000000FF0000;
 527                                 p2 |= (uint64)remainder << 16;
 528 //WriteLog("%08X%08X]\n", (uint32)(p2>>32), (uint32)(p2&0xFFFFFFFF));
 529                                 OPStorePhrase(oldOPP+16, p2);
 530 //remainder = (uint8)(p2 >> 16), vscale = (uint8)(p2 >> 8);
 531 //WriteLog(" [after]: rem=%02X, vscale=%02X\n", remainder, vscale);
 532                         }
 533                         op_pointer = (p0 & 0x000007FFFF000000) >> 21;
 534                         break;
 535                 }
 536                 case OBJECT_TYPE_GPU:
 537                 {
 538 //WriteLog("OP: Asserting GPU IRQ #3...\n");
 539                         op_set_current_object(p0);
 540                         GPUSetIRQLine(3, ASSERT_LINE);
 541 //Also, OP processing is suspended from this point until OBF (F00026) is written to...
 542 // !!! FIX !!!
 543 //Do something like:
 544 //OPSuspendedByGPU = true;
 545 //Dunno if the OP keeps processing from where it was interrupted, or if it just continues
 546 //on the next scanline...
 547 // --> It continues from where it was interrupted! !!! FIX !!!
 548                         break;
 549                 }
 550                 case OBJECT_TYPE_BRANCH:
 551                 {
 552                         uint16 ypos = (p0 >> 3) & 0x7FF;
 553                         uint8  cc   = (p0 >> 14) & 0x03;
 554                         uint32 link = (p0 >> 21) & 0x3FFFF8;
 555
 556 //                      if ((ypos!=507)&&(ypos!=25))
 557 //                              WriteLog("\t%i%s%i link=0x%.8x\n",scanline,condition_to_str[cc],ypos>>1,link);
 558                         switch (cc)
 559                         {
 560                         case CONDITION_EQUAL:
 561                                 if (TOMReadWord(0xF00006, OP) == ypos || ypos == 0x7FF)
 562                                         op_pointer = link;
 563                                 break;
 564                         case CONDITION_LESS_THAN:
 565                                 if (TOMReadWord(0xF00006, OP) < ypos)
 566                                         op_pointer = link;
 567                                 break;
 568                         case CONDITION_GREATER_THAN:
 569                                 if (TOMReadWord(0xF00006, OP) > ypos)
 570                                         op_pointer = link;
 571                                 break;
 572                         case CONDITION_OP_FLAG_SET:
 573                                 if (op_get_status_register() & 0x01)
 574                                         op_pointer = link;
 575                                 break;
 576                         case CONDITION_SECOND_HALF_LINE:
 577                                 // This basically means branch if bit 10 of HC is set
 578                                 WriteLog("OP: Unexpected CONDITION_SECOND_HALF_LINE in BRANCH object\nOP: shuting down\n");
 579                                 fclose(log_get());
 580                                 exit(0);
 581                                 break;
 582                         default:
 583                                 WriteLog("OP: Unimplemented branch condition %i\n", cc);
 584                         }
 585                         break;
 586                 }
 587                 case OBJECT_TYPE_STOP:
 588                 {
 589 //op_start_log = 0;
 590                         // unsure
 591 //WriteLog("OP: --> STOP\n");
 592 //                      op_set_status_register(((p0>>3) & 0xFFFFFFFF));
 593 //This seems more likely...
 594                         op_set_current_object(p0);
 595
 596                         if (p0 & 0x08)
 597                         {
 598                                 tom_set_pending_object_int();
 599                                 if (tom_irq_enabled(IRQ_OPFLAG))// && jaguar_interrupt_handler_is_valid(64))
 600                                         m68k_set_irq(7);                                // Cause an NMI to occur...
 601                         }
 602
 603                         return;
 604 //                      break;
 605                 }
 606                 default:
 607                         WriteLog("op: unknown object type %i\n", ((uint8)p0 & 0x07));
 608                         return;
 609                 }
 610         }
 611 }
 612
 613 //
 614 // Store fixed size bitmap in line buffer
 615 //
 616 void OPProcessFixedBitmap(uint64 p0, uint64 p1, bool render)
 617 {
 618 // Need to make sure that when writing that it stays within the line buffer...
 619 // LBUF ($F01800 - $F01D9E) 360 x 32-bit RAM
 620         uint8 depth = (p1 >> 12) & 0x07;                                // Color depth of image
 621         int32 xpos = ((int16)((p1 << 4) & 0xFFFF)) >> 4;// Image xpos in LBUF
 622         uint32 iwidth = (p1 >> 28) & 0x3FF;                             // Image width in *phrases*
 623         uint32 data = (p0 >> 40) & 0xFFFFF8;                    // Pixel data address
 624 //#ifdef OP_DEBUG_BMP
 625         uint32  firstPix = (p1 >> 49) & 0x3F;
 626         // "The LSB is significant only for scaled objects..." -JTRM
 627         // "In 1 BPP mode, all five bits are significant. In 2 BPP mode, the top four are significant..."
 628         firstPix &= 0x3E;
 629 //#endif
 630 // We can ignore the RELEASE (high order) bit for now--probably forever...!
 631 //      uint8 flags = (p1 >> 45) & 0x0F;        // REFLECT, RMW, TRANS, RELEASE
 632 //Optimize: break these out to their own BOOL values
 633         uint8 flags = (p1 >> 45) & 0x07;                                // REFLECT (0), RMW (1), TRANS (2)
 634         bool flagREFLECT = (flags & OPFLAG_REFLECT ? true : false),
 635                 flagRMW = (flags & OPFLAG_RMW ? true : false),
 636                 flagTRANS = (flags & OPFLAG_TRANS ? true : false);
 637 // "For images with 1 to 4 bits/pixel the top 7 to 4 bits of the index
 638 //  provide the most significant bits of the palette address."
 639         uint8 index = (p1 >> 37) & 0xFE;                                // CLUT index offset (upper pix, 1-4 bpp)
 640         uint32 pitch = (p1 >> 15) & 0x07;                               // Phrase pitch
 641         pitch <<= 3;                                                                    // Optimization: Multiply pitch by 8
 642
 643 //      int16 scanlineWidth = tom_getVideoModeWidth();
 644         uint8 * tom_ram_8 = tom_get_ram_pointer();
 645         uint8 * paletteRAM = &tom_ram_8[0x400];
 646         // This is OK as long as it's used correctly: For 16-bit RAM to RAM direct copies--NOT
 647         // for use when using endian-corrected data (i.e., any of the *_word_read functions!)
 648         uint16 * paletteRAM16 = (uint16 *)paletteRAM;
 649
 650 //      WriteLog("bitmap %ix? %ibpp at %i,? firstpix=? data=0x%.8x pitch %i hflipped=%s dwidth=? (linked to ?) RMW=%s Tranparent=%s\n",
 651 //              iwidth, op_bitmap_bit_depth[bitdepth], xpos, ptr, pitch, (flags&OPFLAG_REFLECT ? "yes" : "no"), (flags&OPFLAG_RMW ? "yes" : "no"), (flags&OPFLAG_TRANS ? "yes" : "no"));
 652
 653 // Is it OK to have a 0 for the data width??? (i.e., undocumented?)
 654 // Seems to be... Seems that dwidth *can* be zero (i.e., reuse same line) as well.
 655 // Pitch == 0 is OK too...
 656 //      if (!render || op_pointer == 0 || ptr == 0 || pitch == 0)
 657 //I'm not convinced that we need to concern ourselves with data & op_pointer here either!
 658         if (!render || iwidth == 0)
 659                 return;
 660
 661 //#define OP_DEBUG_BMP
 662 //#ifdef OP_DEBUG_BMP
 663 //      WriteLog("bitmap %ix%i %ibpp at %i,%i firstpix=%i data=0x%.8x pitch %i hflipped=%s dwidth=%i (linked to 0x%.8x) Transluency=%s\n",
 664 //              iwidth, height, op_bitmap_bit_depth[bitdepth], xpos, ypos, firstPix, ptr, pitch, (flags&OPFLAG_REFLECT ? "yes" : "no"), dwidth, op_pointer, (flags&OPFLAG_RMW ? "yes" : "no"));
 665 //#endif
 666
 667 //      int32 leftMargin = xpos, rightMargin = (xpos + (phraseWidthToPixels[depth] * iwidth)) - 1;
 668         int32 startPos = xpos, endPos = xpos +
 669                 (!flagREFLECT ? (phraseWidthToPixels[depth] * iwidth) - 1
 670                 : -((phraseWidthToPixels[depth] * iwidth) + 1));
 671         uint32 clippedWidth = 0, phraseClippedWidth = 0, dataClippedWidth = 0;//, phrasePixel = 0;
 672         bool in24BPPMode = (((GET16(tom_ram_8, 0x0028) >> 1) & 0x03) == 1 ? true : false);      // VMODE
 673         // Not sure if this is Jaguar Two only location or what...
 674         // From the docs, it is... If we want to limit here we should think of something else.
 675 //      int32 limit = GET16(tom_ram_8, 0x0008);                 // LIMIT
 676         int32 limit = 720;
 677         int32 lbufWidth = (!in24BPPMode ? limit - 1 : (limit / 2) - 1); // Zero based limit...
 678
 679         // If the image is completely to the left or right of the line buffer, then bail.
 680 //If in REFLECT mode, then these values are swapped! !!! FIX !!! [DONE]
 681 //There are four possibilities:
 682 //  1. image sits on left edge and no REFLECT; starts out of bounds but ends in bounds.
 683 //  2. image sits on left edge and REFLECT; starts in bounds but ends out of bounds.
 684 //  3. image sits on right edge and REFLECT; starts out of bounds but ends in bounds.
 685 //  4. image sits on right edge and no REFLECT; starts in bounds but ends out of bounds.
 686 //Numbers 2 & 4 can be caught by checking the LBUF clip while in the inner loop,
 687 // numbers 1 & 3 are of concern.
 688 // This *indirectly* handles only cases 2 & 4! And is WRONG is REFLECT is set...!
 689 //      if (rightMargin < 0 || leftMargin > lbufWidth)
 690
 691 // It might be easier to swap these (if REFLECTed) and just use XPOS down below...
 692 // That way, you could simply set XPOS to leftMargin if !REFLECT and to rightMargin otherwise.
 693 // Still have to be careful with the DATA and IWIDTH values though...
 694
 695 //      if ((!flagREFLECT && (rightMargin < 0 || leftMargin > lbufWidth))
 696 //              || (flagREFLECT && (leftMargin < 0 || rightMargin > lbufWidth)))
 697 //              return;
 698         if ((!flagREFLECT && (endPos < 0 || startPos > lbufWidth))
 699                 || (flagREFLECT && (startPos < 0 || endPos > lbufWidth)))
 700                 return;
 701
 702         // Otherwise, find the clip limits and clip the phrase as well...
 703         // NOTE: I'm fudging here by letting the actual blit overstep the bounds of the
 704         //       line buffer, but it shouldn't matter since there are two unused line
 705         //       buffers below and nothing above and I'll at most write 8 bytes outside
 706         //       the line buffer... I could use a fractional clip begin/end value, but
 707         //       this makes the blit a *lot* more hairy. I might fix this in the future
 708         //       if it becomes necessary. (JLH)
 709         //       Probably wouldn't be *that* hairy. Just use a delta that tells the inner loop
 710         //       which pixel in the phrase is being written, and quit when either end of phrases
 711         //       is reached or line buffer extents are surpassed.
 712
 713 //This stuff is probably wrong as well... !!! FIX !!!
 714 //The strange thing is that it seems to work, but that's no guarantee that it's bulletproof!
 715 //Yup. Seems that JagMania doesn't work correctly with this...
 716 //Dunno if this is the problem, but Atari Karts is showing *some* of the road now...
 717 //      if (!flagREFLECT)
 718
 719 /*
 720         if (leftMargin < 0)
 721                 clippedWidth = 0 - leftMargin,
 722                 phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth],
 723                 leftMargin = 0 - (clippedWidth % phraseWidthToPixels[depth]);
 724 //              leftMargin = 0;
 725
 726         if (rightMargin > lbufWidth)
 727                 clippedWidth = rightMargin - lbufWidth,
 728                 phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth];//,
 729 //              rightMargin = lbufWidth + (clippedWidth % phraseWidthToPixels[depth]);
 730 //              rightMargin = lbufWidth;
 731 */
 732 if (depth > 5)
 733         WriteLog("OP: We're about to encounter a divide by zero error!\n");
 734         // NOTE: We're just using endPos to figure out how much, if any, to clip by.
 735         // ALSO: There may be another case where we start out of bounds and end out of bounds...!
 736         // !!! FIX !!!
 737         if (startPos < 0)                       // Case #1: Begin out, end in, L to R
 738                 clippedWidth = 0 - startPos,
 739                 dataClippedWidth = phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth],
 740                 startPos = 0 - (clippedWidth % phraseWidthToPixels[depth]);
 741
 742         if (endPos < 0)                         // Case #2: Begin in, end out, R to L
 743                 clippedWidth = 0 - endPos,
 744                 phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth];
 745
 746         if (endPos > lbufWidth)         // Case #3: Begin in, end out, L to R
 747                 clippedWidth = endPos - lbufWidth,
 748                 phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth];
 749
 750         if (startPos > lbufWidth)       // Case #4: Begin out, end in, R to L
 751                 clippedWidth = startPos - lbufWidth,
 752                 dataClippedWidth = phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth],
 753                 startPos = lbufWidth + (clippedWidth % phraseWidthToPixels[depth]);
 754
 755         // If the image is sitting on the line buffer left or right edge, we need to compensate
 756         // by decreasing the image phrase width accordingly.
 757         iwidth -= phraseClippedWidth;
 758
 759         // Also, if we're clipping the phrase we need to make sure we're in the correct part of
 760         // the pixel data.
 761 //      data += phraseClippedWidth * (pitch << 3);
 762         data += dataClippedWidth * pitch;
 763
 764         // NOTE: When the bitmap is in REFLECT mode, the XPOS marks the *right* side of the
 765         //       bitmap! This makes clipping & etc. MUCH, much easier...!
 766 //      uint32 lbufAddress = 0x1800 + (!in24BPPMode ? leftMargin * 2 : leftMargin * 4);
 767 //Why does this work right when multiplying startPos by 2 (instead of 4) for 24 BPP mode?
 768 //Is this a bug in the OP?
 769         uint32 lbufAddress = 0x1800 + (!in24BPPMode ? startPos * 2 : startPos * 2);
 770         uint8 * currentLineBuffer = &tom_ram_8[lbufAddress];
 771
 772         // Render.
 773
 774 // Hmm. We check above for 24 BPP mode, but don't do anything about it below...
 775 // If we *were* in 24 BPP mode, how would you convert CRY to RGB24? Seems to me
 776 // that if you're in CRY mode then you wouldn't be able to use 24 BPP bitmaps
 777 // anyway.
 778 // This seems to be the case (at least according to the Midsummer docs)...!
 779
 780         if (depth == 0)                                                                 // 1 BPP
 781         {
 782                 // The LSB of flags is OPFLAG_REFLECT, so sign extend it and or 2 into it.
 783                 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
 784
 785                 // Fetch 1st phrase...
 786                 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
 787 //Note that firstPix should only be honored *if* we start with the 1st phrase of the bitmap
 788 //i.e., we didn't clip on the margin... !!! FIX !!!
 789                 pixels <<= firstPix;                                            // Skip first N pixels (N=firstPix)...
 790                 int i = firstPix;                                                       // Start counter at right spot...
 791
 792                 while (iwidth--)
 793                 {
 794                         while (i++ < 64)
 795                         {
 796                                 uint8 bit = pixels >> 63;
 797                                 if (flagTRANS && bit == 0)
 798                                         ;       // Do nothing...
 799                                 else
 800                                 {
 801                                         if (!flagRMW)
 802 //Optimize: Set palleteRAM16 to beginning of palette RAM + index*2 and use only [bit] as index...
 803 //Won't optimize RMW case though...
 804                                                 // This is the *only* correct use of endian-dependent code
 805                                                 // (i.e., mem-to-mem direct copying)!
 806                                                 *(uint16 *)currentLineBuffer = paletteRAM16[index | bit];
 807                                         else
 808                                                 *currentLineBuffer =
 809                                                         BLEND_CR(*currentLineBuffer, paletteRAM[(index | bit) << 1]),
 810                                                 *(currentLineBuffer + 1) =
 811                                                         BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bit) << 1) + 1]);
 812                                 }
 813
 814                                 currentLineBuffer += lbufDelta;
 815                                 pixels <<= 1;
 816                         }
 817                         i = 0;
 818                         // Fetch next phrase...
 819                         data += pitch;
 820                         pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
 821                 }
 822         }
 823         else if (depth == 1)                                                    // 2 BPP
 824         {
 825 if (firstPix)
 826         WriteLog("OP: Fixed bitmap @ 2 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
 827                 index &= 0xFC;                                                          // Top six bits form CLUT index
 828                 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
 829                 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
 830
 831                 while (iwidth--)
 832                 {
 833                         // Fetch phrase...
 834                         uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
 835                         data += pitch;
 836
 837                         for(int i=0; i<32; i++)
 838                         {
 839                                 uint8 bits = pixels >> 62;
 840 // Seems to me that both of these are in the same endian, so we could cast it as
 841 // uint16 * and do straight across copies (what about 24 bpp? Treat it differently...)
 842 // This only works for the palettized modes (1 - 8 BPP), since we actually have to
 843 // copy data from memory in 16 BPP mode (or does it? Isn't this the same as the CLUT case?)
 844 // No, it isn't because we read the memory in an endian safe way--this *won't* work...
 845                                 if (flagTRANS && bits == 0)
 846                                         ;       // Do nothing...
 847                                 else
 848                                 {
 849                                         if (!flagRMW)
 850                                                 *(uint16 *)currentLineBuffer = paletteRAM16[index | bits];
 851                                         else
 852                                                 *currentLineBuffer =
 853                                                         BLEND_CR(*currentLineBuffer, paletteRAM[(index | bits) << 1]),
 854                                                 *(currentLineBuffer + 1) =
 855                                                         BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bits) << 1) + 1]);
 856                                 }
 857
 858                                 currentLineBuffer += lbufDelta;
 859                                 pixels <<= 2;
 860                         }
 861                 }
 862         }
 863         else if (depth == 2)                                                    // 4 BPP
 864         {
 865 if (firstPix)
 866         WriteLog("OP: Fixed bitmap @ 4 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
 867                 index &= 0xF0;                                                          // Top four bits form CLUT index
 868                 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
 869                 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
 870
 871                 while (iwidth--)
 872                 {
 873                         // Fetch phrase...
 874                         uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
 875                         data += pitch;
 876
 877                         for(int i=0; i<16; i++)
 878                         {
 879                                 uint8 bits = pixels >> 60;
 880 // Seems to me that both of these are in the same endian, so we could cast it as
 881 // uint16 * and do straight across copies (what about 24 bpp? Treat it differently...)
 882 // This only works for the palettized modes (1 - 8 BPP), since we actually have to
 883 // copy data from memory in 16 BPP mode (or does it? Isn't this the same as the CLUT case?)
 884 // No, it isn't because we read the memory in an endian safe way--this *won't* work...
 885                                 if (flagTRANS && bits == 0)
 886                                         ;       // Do nothing...
 887                                 else
 888                                 {
 889                                         if (!flagRMW)
 890                                                 *(uint16 *)currentLineBuffer = paletteRAM16[index | bits];
 891                                         else
 892                                                 *currentLineBuffer =
 893                                                         BLEND_CR(*currentLineBuffer, paletteRAM[(index | bits) << 1]),
 894                                                 *(currentLineBuffer + 1) =
 895                                                         BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bits) << 1) + 1]);
 896                                 }
 897
 898                                 currentLineBuffer += lbufDelta;
 899                                 pixels <<= 4;
 900                         }
 901                 }
 902         }
 903         else if (depth == 3)                                                    // 8 BPP
 904         {
 905                 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
 906                 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
 907
 908                 // Fetch 1st phrase...
 909                 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
 910 //Note that firstPix should only be honored *if* we start with the 1st phrase of the bitmap
 911 //i.e., we didn't clip on the margin... !!! FIX !!!
 912                 firstPix &= 0x30;                                                       // Only top two bits are valid for 8 BPP
 913                 pixels <<= firstPix;                                            // Skip first N pixels (N=firstPix)...
 914                 int i = firstPix >> 3;                                          // Start counter at right spot...
 915
 916                 while (iwidth--)
 917                 {
 918                         while (i++ < 8)
 919                         {
 920                                 uint8 bits = pixels >> 56;
 921 // Seems to me that both of these are in the same endian, so we could cast it as
 922 // uint16 * and do straight across copies (what about 24 bpp? Treat it differently...)
 923 // This only works for the palettized modes (1 - 8 BPP), since we actually have to
 924 // copy data from memory in 16 BPP mode (or does it? Isn't this the same as the CLUT case?)
 925 // No, it isn't because we read the memory in an endian safe way--this *won't* work...
 926                                 if (flagTRANS && bits == 0)
 927                                         ;       // Do nothing...
 928                                 else
 929                                 {
 930                                         if (!flagRMW)
 931                                                 *(uint16 *)currentLineBuffer = paletteRAM16[bits];
 932                                         else
 933                                                 *currentLineBuffer =
 934                                                         BLEND_CR(*currentLineBuffer, paletteRAM[bits << 1]),
 935                                                 *(currentLineBuffer + 1) =
 936                                                         BLEND_Y(*(currentLineBuffer + 1), paletteRAM[(bits << 1) + 1]);
 937                                 }
 938
 939                                 currentLineBuffer += lbufDelta;
 940                                 pixels <<= 8;
 941                         }
 942                         i = 0;
 943                         // Fetch next phrase...
 944                         data += pitch;
 945                         pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
 946                 }
 947         }
 948         else if (depth == 4)                                                    // 16 BPP
 949         {
 950 if (firstPix)
 951         WriteLog("OP: Fixed bitmap @ 16 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
 952                 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
 953                 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
 954
 955                 while (iwidth--)
 956                 {
 957                         // Fetch phrase...
 958                         uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
 959                         data += pitch;
 960
 961                         for(int i=0; i<4; i++)
 962                         {
 963                                 uint8 bitsHi = pixels >> 56, bitsLo = pixels >> 48;
 964 // Seems to me that both of these are in the same endian, so we could cast it as
 965 // uint16 * and do straight across copies (what about 24 bpp? Treat it differently...)
 966 // This only works for the palettized modes (1 - 8 BPP), since we actually have to
 967 // copy data from memory in 16 BPP mode (or does it? Isn't this the same as the CLUT case?)
 968 // No, it isn't because we read the memory in an endian safe way--it *won't* work...
 969                                 if (flagTRANS && (bitsLo | bitsHi) == 0)
 970                                         ;       // Do nothing...
 971                                 else
 972                                 {
 973                                         if (!flagRMW)
 974                                                 *currentLineBuffer = bitsHi,
 975                                                 *(currentLineBuffer + 1) = bitsLo;
 976                                         else
 977                                                 *currentLineBuffer =
 978                                                         BLEND_CR(*currentLineBuffer, bitsHi),
 979                                                 *(currentLineBuffer + 1) =
 980                                                         BLEND_Y(*(currentLineBuffer + 1), bitsLo);
 981                                 }
 982
 983                                 currentLineBuffer += lbufDelta;
 984                                 pixels <<= 16;
 985                         }
 986                 }
 987         }
 988         else if (depth == 5)                                                    // 24 BPP
 989         {
 990 //Looks like Iron Soldier is the only game that uses 24BPP mode...
 991 //There *might* be others...
 992 //WriteLog("OP: Writing 24 BPP bitmap!\n");
 993 if (firstPix)
 994         WriteLog("OP: Fixed bitmap @ 24 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
 995                 // Not sure, but I think RMW only works with 16 BPP and below, and only in CRY mode...
 996                 // The LSB of flags is OPFLAG_REFLECT, so sign extend it and OR 4 into it.
 997                 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 4) | 0x04;
 998
 999                 while (iwidth--)
1000                 {
1001                         // Fetch phrase...
1002                         uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1003                         data += pitch;
1004
1005                         for(int i=0; i<2; i++)
1006                         {
1007                                 // We don't use a 32-bit var here because of endian issues...!
1008                                 uint8 bits3 = pixels >> 56, bits2 = pixels >> 48,
1009                                         bits1 = pixels >> 40, bits0 = pixels >> 32;
1010
1011                                 if (flagTRANS && (bits3 | bits2 | bits1 | bits0) == 0)
1012                                         ;       // Do nothing...
1013                                 else
1014                                         *currentLineBuffer = bits3,
1015                                         *(currentLineBuffer + 1) = bits2,
1016                                         *(currentLineBuffer + 2) = bits1,
1017                                         *(currentLineBuffer + 3) = bits0;
1018
1019                                 currentLineBuffer += lbufDelta;
1020                                 pixels <<= 32;
1021                         }
1022                 }
1023         }
1024 }
1025
1026 //
1027 // Store scaled bitmap in line buffer
1028 //
1029 void OPProcessScaledBitmap(uint64 p0, uint64 p1, uint64 p2, bool render)
1030 {
1031 // Need to make sure that when writing that it stays within the line buffer...
1032 // LBUF ($F01800 - $F01D9E) 360 x 32-bit RAM
1033         uint8 depth = (p1 >> 12) & 0x07;                                // Color depth of image
1034         int32 xpos = ((int16)((p1 << 4) & 0xFFFF)) >> 4;// Image xpos in LBUF
1035         uint32 iwidth = (p1 >> 28) & 0x3FF;                             // Image width in *phrases*
1036         uint32 data = (p0 >> 40) & 0xFFFFF8;                    // Pixel data address
1037 //#ifdef OP_DEBUG_BMP
1038 // Prolly should use this... Though not sure exactly how.
1039 //Use the upper bits as an offset into the phrase depending on the BPP. That's how!
1040         uint32 firstPix = (p1 >> 49) & 0x3F;
1041 //This is WEIRD! I'm sure I saw Atari Karts request 8 BPP FIRSTPIX! What happened???
1042 if (firstPix)
1043         WriteLog("OP: FIRSTPIX != 0! (Scaled BM)\n");
1044 //#endif
1045 // We can ignore the RELEASE (high order) bit for now--probably forever...!
1046 //      uint8 flags = (p1 >> 45) & 0x0F;        // REFLECT, RMW, TRANS, RELEASE
1047 //Optimize: break these out to their own BOOL values
1048         uint8 flags = (p1 >> 45) & 0x07;                                // REFLECT (0), RMW (1), TRANS (2)
1049         bool flagREFLECT = (flags & OPFLAG_REFLECT ? true : false),
1050                 flagRMW = (flags & OPFLAG_RMW ? true : false),
1051                 flagTRANS = (flags & OPFLAG_TRANS ? true : false);
1052         uint8 index = (p1 >> 37) & 0xFE;                                // CLUT index offset (upper pix, 1-4 bpp)
1053         uint32 pitch = (p1 >> 15) & 0x07;                               // Phrase pitch
1054
1055         uint8 * tom_ram_8 = tom_get_ram_pointer();
1056         uint8 * paletteRAM = &tom_ram_8[0x400];
1057         // This is OK as long as it's used correctly: For 16-bit RAM to RAM direct copies--NOT
1058         // for use when using endian-corrected data (i.e., any of the *ReadWord functions!)
1059         uint16 * paletteRAM16 = (uint16 *)paletteRAM;
1060
1061         uint8 hscale = p2 & 0xFF;
1062 //      uint8 horizontalRemainder = hscale;                             // Not sure if it starts full, but seems reasonable [It's not!]
1063         uint8 horizontalRemainder = 0;                                  // Let's try zero! Seems to work! Yay!
1064         int32 scaledWidthInPixels = (iwidth * phraseWidthToPixels[depth] * hscale) >> 5;
1065         uint32 scaledPhrasePixels = (phraseWidthToPixels[depth] * hscale) >> 5;
1066
1067 //      WriteLog("bitmap %ix? %ibpp at %i,? firstpix=? data=0x%.8x pitch %i hflipped=%s dwidth=? (linked to ?) RMW=%s Tranparent=%s\n",
1068 //              iwidth, op_bitmap_bit_depth[bitdepth], xpos, ptr, pitch, (flags&OPFLAG_REFLECT ? "yes" : "no"), (flags&OPFLAG_RMW ? "yes" : "no"), (flags&OPFLAG_TRANS ? "yes" : "no"));
1069
1070 // Looks like an hscale of zero means don't draw!
1071         if (!render || iwidth == 0 || hscale == 0)
1072                 return;
1073
1074 //#define OP_DEBUG_BMP
1075 //#ifdef OP_DEBUG_BMP
1076 //      WriteLog("bitmap %ix%i %ibpp at %i,%i firstpix=%i data=0x%.8x pitch %i hflipped=%s dwidth=%i (linked to 0x%.8x) Transluency=%s\n",
1077 //              iwidth, height, op_bitmap_bit_depth[bitdepth], xpos, ypos, firstPix, ptr, pitch, (flags&OPFLAG_REFLECT ? "yes" : "no"), dwidth, op_pointer, (flags&OPFLAG_RMW ? "yes" : "no"));
1078 //#endif
1079
1080         int32 startPos = xpos, endPos = xpos +
1081                 (!flagREFLECT ? scaledWidthInPixels - 1 : -(scaledWidthInPixels + 1));
1082         uint32 clippedWidth = 0, phraseClippedWidth = 0, dataClippedWidth = 0;
1083         bool in24BPPMode = (((GET16(tom_ram_8, 0x0028) >> 1) & 0x03) == 1 ? true : false);      // VMODE
1084         // Not sure if this is Jaguar Two only location or what...
1085         // From the docs, it is... If we want to limit here we should think of something else.
1086 //      int32 limit = GET16(tom_ram_8, 0x0008);                 // LIMIT
1087         int32 limit = 720;
1088         int32 lbufWidth = (!in24BPPMode ? limit - 1 : (limit / 2) - 1); // Zero based limit...
1089
1090         // If the image is completely to the left or right of the line buffer, then bail.
1091 //If in REFLECT mode, then these values are swapped! !!! FIX !!! [DONE]
1092 //There are four possibilities:
1093 //  1. image sits on left edge and no REFLECT; starts out of bounds but ends in bounds.
1094 //  2. image sits on left edge and REFLECT; starts in bounds but ends out of bounds.
1095 //  3. image sits on right edge and REFLECT; starts out of bounds but ends in bounds.
1096 //  4. image sits on right edge and no REFLECT; starts in bounds but ends out of bounds.
1097 //Numbers 2 & 4 can be caught by checking the LBUF clip while in the inner loop,
1098 // numbers 1 & 3 are of concern.
1099 // This *indirectly* handles only cases 2 & 4! And is WRONG is REFLECT is set...!
1100 //      if (rightMargin < 0 || leftMargin > lbufWidth)
1101
1102 // It might be easier to swap these (if REFLECTed) and just use XPOS down below...
1103 // That way, you could simply set XPOS to leftMargin if !REFLECT and to rightMargin otherwise.
1104 // Still have to be careful with the DATA and IWIDTH values though...
1105
1106         if ((!flagREFLECT && (endPos < 0 || startPos > lbufWidth))
1107                 || (flagREFLECT && (startPos < 0 || endPos > lbufWidth)))
1108                 return;
1109
1110         // Otherwise, find the clip limits and clip the phrase as well...
1111         // NOTE: I'm fudging here by letting the actual blit overstep the bounds of the
1112         //       line buffer, but it shouldn't matter since there are two unused line
1113         //       buffers below and nothing above and I'll at most write 40 bytes outside
1114         //       the line buffer... I could use a fractional clip begin/end value, but
1115         //       this makes the blit a *lot* more hairy. I might fix this in the future
1116         //       if it becomes necessary. (JLH)
1117         //       Probably wouldn't be *that* hairy. Just use a delta that tells the inner loop
1118         //       which pixel in the phrase is being written, and quit when either end of phrases
1119         //       is reached or line buffer extents are surpassed.
1120
1121 //This stuff is probably wrong as well... !!! FIX !!!
1122 //The strange thing is that it seems to work, but that's no guarantee that it's bulletproof!
1123 //Yup. Seems that JagMania doesn't work correctly with this...
1124 //Dunno if this is the problem, but Atari Karts is showing *some* of the road now...
1125 //Actually, it is! Or, it was. It doesn't seem to be clipping here, so the problem lies
1126 //elsewhere! Hmm. Putting the scaling code into the 1/2/8 BPP cases seems to draw the ground
1127 // a bit more accurately... Strange!
1128 //It's probably a case of the REFLECT flag being set and the background being written
1129 //from the right side of the screen...
1130 //But no, it isn't... At least if the diagnostics are telling the truth!
1131
1132         // NOTE: We're just using endPos to figure out how much, if any, to clip by.
1133         // ALSO: There may be another case where we start out of bounds and end out of bounds...!
1134         // !!! FIX !!!
1135
1136 //There's a problem here with scaledPhrasePixels in that it can be forced to zero when
1137 //the scaling factor is small. So fix it already! !!! FIX !!!
1138 /*if (scaledPhrasePixels == 0)
1139 {
1140         WriteLog("OP: [Scaled] We're about to encounter a divide by zero error!\n");
1141         DumpScaledObject(p0, p1, p2);
1142 }//*/
1143 //NOTE: I'm almost 100% sure that this is wrong... And it is! :-p
1144         if (startPos < 0)                       // Case #1: Begin out, end in, L to R
1145 /*              clippedWidth = 0 - startPos,
1146                 dataClippedWidth = phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth],
1147                 startPos = 0 - (clippedWidth % phraseWidthToPixels[depth]);*/
1148                 clippedWidth = 0 - startPos,
1149                 dataClippedWidth = phraseClippedWidth = clippedWidth / scaledPhrasePixels,
1150                 startPos = 0 - (clippedWidth % scaledPhrasePixels);
1151
1152         if (endPos < 0)                         // Case #2: Begin in, end out, R to L
1153 /*              clippedWidth = 0 - endPos,
1154                 phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth];*/
1155                 clippedWidth = 0 - endPos,
1156                 phraseClippedWidth = clippedWidth / scaledPhrasePixels;
1157
1158         if (endPos > lbufWidth)         // Case #3: Begin in, end out, L to R
1159 /*              clippedWidth = endPos - lbufWidth,
1160                 phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth];*/
1161                 clippedWidth = endPos - lbufWidth,
1162                 phraseClippedWidth = clippedWidth / scaledPhrasePixels;
1163
1164         if (startPos > lbufWidth)       // Case #4: Begin out, end in, R to L
1165 /*              clippedWidth = startPos - lbufWidth,
1166                 dataClippedWidth = phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth],
1167                 startPos = lbufWidth + (clippedWidth % phraseWidthToPixels[depth]);*/
1168                 clippedWidth = startPos - lbufWidth,
1169                 dataClippedWidth = phraseClippedWidth = clippedWidth / scaledPhrasePixels,
1170                 startPos = lbufWidth + (clippedWidth % scaledPhrasePixels);
1171
1172 extern int op_start_log;
1173 if (op_start_log && clippedWidth != 0)
1174         WriteLog("OP: Clipped line. SP=%i, EP=%i, clip=%u, iwidth=%u, hscale=%02X\n", startPos, endPos, clippedWidth, iwidth, hscale);
1175 if (op_start_log && startPos == 13)
1176 {
1177         WriteLog("OP: Scaled line. SP=%i, EP=%i, clip=%u, iwidth=%u, hscale=%02X, depth=%u, firstPix=%u\n", startPos, endPos, clippedWidth, iwidth, hscale, depth, firstPix);
1178         DumpScaledObject(p0, p1, p2);
1179 }
1180         // If the image is sitting on the line buffer left or right edge, we need to compensate
1181         // by decreasing the image phrase width accordingly.
1182         iwidth -= phraseClippedWidth;
1183
1184         // Also, if we're clipping the phrase we need to make sure we're in the correct part of
1185         // the pixel data.
1186 //      data += phraseClippedWidth * (pitch << 3);
1187         data += dataClippedWidth * (pitch << 3);
1188
1189         // NOTE: When the bitmap is in REFLECT mode, the XPOS marks the *right* side of the
1190         //       bitmap! This makes clipping & etc. MUCH, much easier...!
1191 //      uint32 lbufAddress = 0x1800 + (!in24BPPMode ? leftMargin * 2 : leftMargin * 4);
1192 //      uint32 lbufAddress = 0x1800 + (!in24BPPMode ? startPos * 2 : startPos * 4);
1193         uint32 lbufAddress = 0x1800 + (!in24BPPMode ? startPos * 2 : startPos * 2);
1194         uint8 * currentLineBuffer = &tom_ram_8[lbufAddress];
1195
1196         // Render.
1197
1198 // Hmm. We check above for 24 BPP mode, but don't do anything about it below...
1199 // If we *were* in 24 BPP mode, how would you convert CRY to RGB24? Seems to me
1200 // that if you're in CRY mode then you wouldn't be able to use 24 BPP bitmaps
1201 // anyway.
1202 // This seems to be the case (at least according to the Midsummer docs)...!
1203
1204         if (depth == 0)                                                                 // 1 BPP
1205         {
1206 if (firstPix != 0)
1207         WriteLog("OP: Scaled bitmap @ 1 BPP requesting FIRSTPIX!\n");
1208                 // The LSB of flags is OPFLAG_REFLECT, so sign extend it and or 2 into it.
1209                 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1210
1211                 int pixCount = 0;
1212                 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1213
1214                 while ((int32)iwidth > 0)
1215                 {
1216                         uint8 bits = pixels >> 63;
1217
1218                         if (flagTRANS && bits == 0)
1219                                 ;       // Do nothing...
1220                         else
1221                         {
1222                                 if (!flagRMW)
1223                                         // This is the *only* correct use of endian-dependent code
1224                                         // (i.e., mem-to-mem direct copying)!
1225                                         *(uint16 *)currentLineBuffer = paletteRAM16[index | bits];
1226                                 else
1227                                         *currentLineBuffer =
1228                                                 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bits) << 1]),
1229                                         *(currentLineBuffer + 1) =
1230                                                 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bits) << 1) + 1]);
1231                         }
1232
1233                         currentLineBuffer += lbufDelta;
1234
1235                         horizontalRemainder -= 0x20;            // Subtract 1.0f in [3.5] fixed point format
1236                         while (horizontalRemainder & 0x80)
1237                         {
1238                                 horizontalRemainder += hscale;
1239                                 pixCount++;
1240                                 pixels <<= 1;
1241                         }
1242
1243                         if (pixCount > 63)
1244                         {
1245                                 int phrasesToSkip = pixCount / 64, pixelShift = pixCount % 64;
1246
1247                                 data += (pitch << 3) * phrasesToSkip;
1248                                 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1249                                 pixels <<= 1 * pixelShift;
1250                                 iwidth -= phrasesToSkip;
1251                                 pixCount = pixelShift;
1252                         }
1253                 }
1254         }
1255         else if (depth == 1)                                                    // 2 BPP
1256         {
1257 if (firstPix != 0)
1258         WriteLog("OP: Scaled bitmap @ 2 BPP requesting FIRSTPIX!\n");
1259                 index &= 0xFC;                                                          // Top six bits form CLUT index
1260                 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
1261                 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1262
1263                 int pixCount = 0;
1264                 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1265
1266                 while ((int32)iwidth > 0)
1267                 {
1268                         uint8 bits = pixels >> 62;
1269
1270                         if (flagTRANS && bits == 0)
1271                                 ;       // Do nothing...
1272                         else
1273                         {
1274                                 if (!flagRMW)
1275                                         // This is the *only* correct use of endian-dependent code
1276                                         // (i.e., mem-to-mem direct copying)!
1277                                         *(uint16 *)currentLineBuffer = paletteRAM16[index | bits];
1278                                 else
1279                                         *currentLineBuffer =
1280                                                 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bits) << 1]),
1281                                         *(currentLineBuffer + 1) =
1282                                                 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bits) << 1) + 1]);
1283                         }
1284
1285                         currentLineBuffer += lbufDelta;
1286
1287                         horizontalRemainder -= 0x20;            // Subtract 1.0f in [3.5] fixed point format
1288                         while (horizontalRemainder & 0x80)
1289                         {
1290                                 horizontalRemainder += hscale;
1291                                 pixCount++;
1292                                 pixels <<= 2;
1293                         }
1294
1295                         if (pixCount > 31)
1296                         {
1297                                 int phrasesToSkip = pixCount / 32, pixelShift = pixCount % 32;
1298
1299                                 data += (pitch << 3) * phrasesToSkip;
1300                                 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1301                                 pixels <<= 2 * pixelShift;
1302                                 iwidth -= phrasesToSkip;
1303                                 pixCount = pixelShift;
1304                         }
1305                 }
1306         }
1307         else if (depth == 2)                                                    // 4 BPP
1308         {
1309 if (firstPix != 0)
1310         WriteLog("OP: Scaled bitmap @ 4 BPP requesting FIRSTPIX!\n");
1311                 index &= 0xF0;                                                          // Top four bits form CLUT index
1312                 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
1313                 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1314
1315                 int pixCount = 0;
1316                 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1317
1318                 while ((int32)iwidth > 0)
1319                 {
1320                         uint8 bits = pixels >> 60;
1321
1322                         if (flagTRANS && bits == 0)
1323                                 ;       // Do nothing...
1324                         else
1325                         {
1326                                 if (!flagRMW)
1327                                         // This is the *only* correct use of endian-dependent code
1328                                         // (i.e., mem-to-mem direct copying)!
1329                                         *(uint16 *)currentLineBuffer = paletteRAM16[index | bits];
1330                                 else
1331                                         *currentLineBuffer =
1332                                                 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bits) << 1]),
1333                                         *(currentLineBuffer + 1) =
1334                                                 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bits) << 1) + 1]);
1335                         }
1336
1337                         currentLineBuffer += lbufDelta;
1338
1339                         horizontalRemainder -= 0x20;            // Subtract 1.0f in [3.5] fixed point format
1340                         while (horizontalRemainder & 0x80)
1341                         {
1342                                 horizontalRemainder += hscale;
1343                                 pixCount++;
1344                                 pixels <<= 4;
1345                         }
1346
1347                         if (pixCount > 15)
1348                         {
1349                                 int phrasesToSkip = pixCount / 16, pixelShift = pixCount % 16;
1350
1351                                 data += (pitch << 3) * phrasesToSkip;
1352                                 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1353                                 pixels <<= 4 * pixelShift;
1354                                 iwidth -= phrasesToSkip;
1355                                 pixCount = pixelShift;
1356                         }
1357                 }
1358         }
1359         else if (depth == 3)                                                    // 8 BPP
1360         {
1361 if (firstPix)
1362         WriteLog("OP: Scaled bitmap @ 8 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
1363                 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
1364                 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1365
1366                 int pixCount = 0;
1367                 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1368
1369                 while ((int32)iwidth > 0)
1370                 {
1371                         uint8 bits = pixels >> 56;
1372
1373                         if (flagTRANS && bits == 0)
1374                                 ;       // Do nothing...
1375                         else
1376                         {
1377                                 if (!flagRMW)
1378                                         // This is the *only* correct use of endian-dependent code
1379                                         // (i.e., mem-to-mem direct copying)!
1380                                         *(uint16 *)currentLineBuffer = paletteRAM16[bits];
1381                                 else
1382                                         *currentLineBuffer =
1383                                                 BLEND_CR(*currentLineBuffer, paletteRAM[bits << 1]),
1384                                         *(currentLineBuffer + 1) =
1385                                                 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[(bits << 1) + 1]);
1386                         }
1387
1388                         currentLineBuffer += lbufDelta;
1389
1390                         horizontalRemainder -= 0x20;            // Subtract 1.0f in [3.5] fixed point format
1391                         while (horizontalRemainder & 0x80)
1392                         {
1393                                 horizontalRemainder += hscale;
1394                                 pixCount++;
1395                                 pixels <<= 8;
1396                         }
1397
1398                         if (pixCount > 7)
1399                         {
1400                                 int phrasesToSkip = pixCount / 8, pixelShift = pixCount % 8;
1401
1402                                 data += (pitch << 3) * phrasesToSkip;
1403                                 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1404                                 pixels <<= 8 * pixelShift;
1405                                 iwidth -= phrasesToSkip;
1406                                 pixCount = pixelShift;
1407                         }
1408                 }
1409         }
1410         else if (depth == 4)                                                    // 16 BPP
1411         {
1412 if (firstPix != 0)
1413         WriteLog("OP: Scaled bitmap @ 16 BPP requesting FIRSTPIX!\n");
1414                 // The LSB is OPFLAG_REFLECT, so sign extend it and OR 2 into it.
1415                 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1416
1417                 int pixCount = 0;
1418                 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1419
1420                 while ((int32)iwidth > 0)
1421                 {
1422                         uint8 bitsHi = pixels >> 56, bitsLo = pixels >> 48;
1423
1424                         if (flagTRANS && (bitsLo | bitsHi) == 0)
1425                                 ;       // Do nothing...
1426                         else
1427                         {
1428                                 if (!flagRMW)
1429                                         *currentLineBuffer = bitsHi,
1430                                         *(currentLineBuffer + 1) = bitsLo;
1431                                 else
1432                                         *currentLineBuffer =
1433                                                 BLEND_CR(*currentLineBuffer, bitsHi),
1434                                         *(currentLineBuffer + 1) =
1435                                                 BLEND_Y(*(currentLineBuffer + 1), bitsLo);
1436                         }
1437
1438                         currentLineBuffer += lbufDelta;
1439
1440                         horizontalRemainder -= 0x20;            // Subtract 1.0f in [3.5] fixed point format
1441                         while (horizontalRemainder & 0x80)
1442                         {
1443                                 horizontalRemainder += hscale;
1444                                 pixCount++;
1445                                 pixels <<= 16;
1446                         }
1447
1448                         if (pixCount > 3)
1449                         {
1450                                 int phrasesToSkip = pixCount / 4, pixelShift = pixCount % 4;
1451
1452                                 data += (pitch << 3) * phrasesToSkip;
1453                                 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1454                                 pixels <<= 16 * pixelShift;
1455
1456                                 iwidth -= phrasesToSkip;
1457
1458                                 pixCount = pixelShift;
1459                         }
1460                 }
1461         }
1462         else if (depth == 5)                                                    // 24 BPP
1463         {
1464 //I'm not sure that you can scale a 24 BPP bitmap properly--the JTRM seem to indicate as much.
1465 WriteLog("OP: Writing 24 BPP scaled bitmap!\n");
1466 if (firstPix != 0)
1467         WriteLog("OP: Scaled bitmap @ 24 BPP requesting FIRSTPIX!\n");
1468                 // Not sure, but I think RMW only works with 16 BPP and below, and only in CRY mode...
1469                 // The LSB is OPFLAG_REFLECT, so sign extend it and or 4 into it.
1470                 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 4) | 0x04;
1471
1472                 while (iwidth--)
1473                 {
1474                         // Fetch phrase...
1475                         uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1476                         data += pitch << 3;                                             // Multiply pitch * 8 (optimize: precompute this value)
1477
1478                         for(int i=0; i<2; i++)
1479                         {
1480                                 uint8 bits3 = pixels >> 56, bits2 = pixels >> 48,
1481                                         bits1 = pixels >> 40, bits0 = pixels >> 32;
1482
1483                                 if (flagTRANS && (bits3 | bits2 | bits1 | bits0) == 0)
1484                                         ;       // Do nothing...
1485                                 else
1486                                         *currentLineBuffer = bits3,
1487                                         *(currentLineBuffer + 1) = bits2,
1488                                         *(currentLineBuffer + 2) = bits1,
1489                                         *(currentLineBuffer + 3) = bits0;
1490
1491                                 currentLineBuffer += lbufDelta;
1492                                 pixels <<= 32;
1493                         }
1494                 }
1495         }
1496 /*if (depth == 3 && startPos == 13)
1497 {
1498 if (op_start_log)
1499 WriteLog("OP: Writing in the margins...\n");
1500         for(int i=0; i<100*2; i+=2)
1501 //      for(int i=0; i<14*2; i+=2)
1502                 tom_ram_8[0x1800 + i] = 0xFF,
1503                 tom_ram_8[0x1800 + i + 1] = 0xFF;
1504 }*/
1505 //      uint32 lbufAddress = 0x1800 + (!in24BPPMode ? startPos * 2 : startPos * 4);
1506 //      uint8 * currentLineBuffer = &tom_ram_8[lbufAddress];
1507 }