4 // Original source by David Raingeard (Cal2)
5 // GCC/SDL port by Niels Wagenaar (Linux/WIN32) and Caz (BeOS)
6 // Extensive cleanups/fixes/rewrites by James L. Hammons
7 // (C) 2010 Underground Software
9 // JLH = James L. Hammons <jlhamm@acm.org>
12 // --- ---------- -------------------------------------------------------------
13 // JLH 01/16/2010 Created this log ;-)
28 //#define OP_DEBUG_BMP
30 #define BLEND_Y(dst, src) op_blend_y[(((uint16)dst<<8)) | ((uint16)(src))]
31 #define BLEND_CR(dst, src) op_blend_cr[(((uint16)dst)<<8) | ((uint16)(src))]
33 #define OBJECT_TYPE_BITMAP 0 // 000
34 #define OBJECT_TYPE_SCALE 1 // 001
35 #define OBJECT_TYPE_GPU 2 // 010
36 #define OBJECT_TYPE_BRANCH 3 // 011
37 #define OBJECT_TYPE_STOP 4 // 100
39 #define CONDITION_EQUAL 0
40 #define CONDITION_LESS_THAN 1
41 #define CONDITION_GREATER_THAN 2
42 #define CONDITION_OP_FLAG_SET 3
43 #define CONDITION_SECOND_HALF_LINE 4
45 #define OPFLAG_RELEASE 8 // Bus release bit
46 #define OPFLAG_TRANS 4 // Transparency bit
47 #define OPFLAG_RMW 2 // Read-Modify-Write bit
48 #define OPFLAG_REFLECT 1 // Horizontal mirror bit
50 // Private function prototypes
52 void OPProcessFixedBitmap(uint64 p0, uint64 p1, bool render);
53 void OPProcessScaledBitmap(uint64 p0, uint64 p1, uint64 p2, bool render);
54 void DumpScaledObject(uint64 p0, uint64 p1, uint64 p2);
55 void DumpFixedObject(uint64 p0, uint64 p1);
56 uint64 OPLoadPhrase(uint32 offset);
58 // Local global variables
60 // Blend tables (64K each)
61 static uint8 op_blend_y[0x10000];
62 static uint8 op_blend_cr[0x10000];
63 // There may be a problem with this "RAM" overlapping (and thus being independent of)
64 // some of the regular TOM RAM...
65 //#warning objectp_ram is separated from TOM RAM--need to fix that!
66 //static uint8 objectp_ram[0x40]; // This is based at $F00000
67 uint8 objectp_running = 0;
68 //bool objectp_stop_reading_list;
70 static uint8 op_bitmap_bit_depth[8] = { 1, 2, 4, 8, 16, 24, 32, 0 };
71 //static uint32 op_bitmap_bit_size[8] =
72 // { (uint32)(0.125*65536), (uint32)(0.25*65536), (uint32)(0.5*65536), (uint32)(1*65536),
73 // (uint32)(2*65536), (uint32)(1*65536), (uint32)(1*65536), (uint32)(1*65536) };
74 static uint32 op_pointer;
76 int32 phraseWidthToPixels[8] = { 64, 32, 16, 8, 4, 2, 0, 0 };
80 // Object Processor initialization
84 // Here we calculate the saturating blend of a signed 4-bit value and an
85 // existing Cyan/Red value as well as a signed 8-bit value and an existing intensity...
86 // Note: CRY is 4 bits Cyan, 4 bits Red, 16 bits intensitY
87 for(int i=0; i<256*256; i++)
89 int y = (i >> 8) & 0xFF;
90 int dy = (int8)i; // Sign extend the Y index
91 int c1 = (i >> 8) & 0x0F;
92 int dc1 = (int8)(i << 4) >> 4; // Sign extend the R index
93 int c2 = (i >> 12) & 0x0F;
94 int dc2 = (int8)(i & 0xF0) >> 4; // Sign extend the C index
119 op_blend_cr[i] = (c2 << 4) | c1;
126 // Object Processor reset
130 // memset(objectp_ram, 0x00, 0x40);
136 const char * opType[8] =
137 { "(BITMAP)", "(SCALED BITMAP)", "(GPU INT)", "(BRANCH)", "(STOP)", "???", "???", "???" };
138 const char * ccType[8] =
139 { "\"==\"", "\"<\"", "\">\"", "(opflag set)", "(second half line)", "?", "?", "?" };
141 uint32 olp = OPGetListPointer();
142 WriteLog("OP: OLP = %08X\n", olp);
143 WriteLog("OP: Phrase dump\n ----------\n");
144 for(uint32 i=0; i<0x100; i+=8)
146 uint32 hi = JaguarReadLong(olp + i, OP), lo = JaguarReadLong(olp + i + 4, OP);
147 WriteLog("\t%08X: %08X %08X %s", olp + i, hi, lo, opType[lo & 0x07]);
148 if ((lo & 0x07) == 3)
150 uint16 ypos = (lo >> 3) & 0x7FF;
151 uint8 cc = (lo >> 14) & 0x03;
152 uint32 link = ((hi << 11) | (lo >> 21)) & 0x3FFFF8;
153 WriteLog(" YPOS=%u, CC=%s, link=%08X", ypos, ccType[cc], link);
156 if ((lo & 0x07) == 0)
157 DumpFixedObject(OPLoadPhrase(olp+i), OPLoadPhrase(olp+i+8));
158 if ((lo & 0x07) == 1)
159 DumpScaledObject(OPLoadPhrase(olp+i), OPLoadPhrase(olp+i+8), OPLoadPhrase(olp+i+16));
163 // memory_free(op_blend_y);
164 // memory_free(op_blend_cr);
168 // Object Processor memory access
169 // Memory range: F00010 - F00027
171 // F00010-F00017 R xxxxxxxx xxxxxxxx OB - current object code from the graphics processor
172 // F00020-F00023 W xxxxxxxx xxxxxxxx OLP - start of the object list
173 // F00026 W -------- -------x OBF - object processor flag
177 uint8 OPReadByte(uint32 offset, uint32 who/*=UNKNOWN*/)
180 return objectp_ram[offset];
183 uint16 OPReadWord(uint32 offset, uint32 who/*=UNKNOWN*/)
186 return GET16(objectp_ram, offset);
189 void OPWriteByte(uint32 offset, uint8 data, uint32 who/*=UNKNOWN*/)
192 objectp_ram[offset] = data;
195 void OPWriteWord(uint32 offset, uint16 data, uint32 who/*=UNKNOWN*/)
198 SET16(objectp_ram, offset, data);
200 /*if (offset == 0x20)
201 WriteLog("OP: Setting lo list pointer: %04X\n", data);
203 WriteLog("OP: Setting hi list pointer: %04X\n", data);//*/
207 uint32 OPGetListPointer(void)
209 // Note: This register is LO / HI WORD, hence the funky look of this...
210 return GET16(tomRam8, 0x20) | (GET16(tomRam8, 0x22) << 16);
213 // This is WRONG, since the OBF is only 16 bits wide!!! [FIXED]
215 uint32 OPGetStatusRegister(void)
217 return GET16(tomRam8, 0x26);
220 // This is WRONG, since the OBF is only 16 bits wide!!! [FIXED]
222 void OPSetStatusRegister(uint32 data)
224 tomRam8[0x26] = (data & 0x0000FF00) >> 8;
225 tomRam8[0x27] |= (data & 0xFE);
228 void OPSetCurrentObject(uint64 object)
230 //Not sure this is right... Wouldn't it just be stored 64 bit BE?
231 // Stored as least significant 32 bits first, ms32 last in big endian
232 /* objectp_ram[0x13] = object & 0xFF; object >>= 8;
233 objectp_ram[0x12] = object & 0xFF; object >>= 8;
234 objectp_ram[0x11] = object & 0xFF; object >>= 8;
235 objectp_ram[0x10] = object & 0xFF; object >>= 8;
237 objectp_ram[0x17] = object & 0xFF; object >>= 8;
238 objectp_ram[0x16] = object & 0xFF; object >>= 8;
239 objectp_ram[0x15] = object & 0xFF; object >>= 8;
240 objectp_ram[0x14] = object & 0xFF;*/
241 // Let's try regular good old big endian...
242 tomRam8[0x17] = object & 0xFF; object >>= 8;
243 tomRam8[0x16] = object & 0xFF; object >>= 8;
244 tomRam8[0x15] = object & 0xFF; object >>= 8;
245 tomRam8[0x14] = object & 0xFF; object >>= 8;
247 tomRam8[0x13] = object & 0xFF; object >>= 8;
248 tomRam8[0x12] = object & 0xFF; object >>= 8;
249 tomRam8[0x11] = object & 0xFF; object >>= 8;
250 tomRam8[0x10] = object & 0xFF;
253 uint64 OPLoadPhrase(uint32 offset)
255 offset &= ~0x07; // 8 byte alignment
256 return ((uint64)JaguarReadLong(offset, OP) << 32) | (uint64)JaguarReadLong(offset+4, OP);
259 void OPStorePhrase(uint32 offset, uint64 p)
261 offset &= ~0x07; // 8 byte alignment
262 JaguarWriteLong(offset, p >> 32, OP);
263 JaguarWriteLong(offset + 4, p & 0xFFFFFFFF, OP);
267 // Debugging routines
269 void DumpScaledObject(uint64 p0, uint64 p1, uint64 p2)
271 WriteLog(" (SCALED BITMAP)");
272 WriteLog(" %08X --> phrase %08X %08X\n", op_pointer, (uint32)(p1>>32), (uint32)(p1&0xFFFFFFFF));
273 WriteLog(" %08X --> phrase %08X %08X ", op_pointer+8, (uint32)(p2>>32), (uint32)(p2&0xFFFFFFFF));
274 uint8 bitdepth = (p1 >> 12) & 0x07;
275 //WAS: int16 ypos = ((p0 >> 3) & 0x3FF); // ??? What if not interlaced (/2)?
276 int16 ypos = ((p0 >> 3) & 0x7FF); // ??? What if not interlaced (/2)?
277 int32 xpos = p1 & 0xFFF;
278 xpos = (xpos & 0x800 ? xpos | 0xFFFFF000 : xpos);
279 uint32 iwidth = ((p1 >> 28) & 0x3FF);
280 uint32 dwidth = ((p1 >> 18) & 0x3FF); // Unsigned!
281 uint16 height = ((p0 >> 14) & 0x3FF);
282 uint32 link = ((p0 >> 24) & 0x7FFFF) << 3;
283 uint32 ptr = ((p0 >> 43) & 0x1FFFFF) << 3;
284 uint32 firstPix = (p1 >> 49) & 0x3F;
285 uint8 flags = (p1 >> 45) & 0x0F;
286 uint8 idx = (p1 >> 38) & 0x7F;
287 uint32 pitch = (p1 >> 15) & 0x07;
288 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",
289 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);
290 uint32 hscale = p2 & 0xFF;
291 uint32 vscale = (p2 >> 8) & 0xFF;
292 uint32 remainder = (p2 >> 16) & 0xFF;
293 WriteLog(" [hsc: %02X, vsc: %02X, rem: %02X]\n", hscale, vscale, remainder);
296 void DumpFixedObject(uint64 p0, uint64 p1)
298 WriteLog(" (BITMAP)");
299 WriteLog(" %08X --> phrase %08X %08X\n", op_pointer, (uint32)(p1>>32), (uint32)(p1&0xFFFFFFFF));
300 uint8 bitdepth = (p1 >> 12) & 0x07;
301 //WAS: int16 ypos = ((p0 >> 3) & 0x3FF); // ??? What if not interlaced (/2)?
302 int16 ypos = ((p0 >> 3) & 0x7FF); // ??? What if not interlaced (/2)?
303 int32 xpos = p1 & 0xFFF;
304 xpos = (xpos & 0x800 ? xpos | 0xFFFFF000 : xpos);
305 uint32 iwidth = ((p1 >> 28) & 0x3FF);
306 uint32 dwidth = ((p1 >> 18) & 0x3FF); // Unsigned!
307 uint16 height = ((p0 >> 14) & 0x3FF);
308 uint32 link = ((p0 >> 24) & 0x7FFFF) << 3;
309 uint32 ptr = ((p0 >> 43) & 0x1FFFFF) << 3;
310 uint32 firstPix = (p1 >> 49) & 0x3F;
311 uint8 flags = (p1 >> 45) & 0x0F;
312 uint8 idx = (p1 >> 38) & 0x7F;
313 uint32 pitch = (p1 >> 15) & 0x07;
314 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",
315 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);
319 // Object Processor main routine
321 //Need to fix this so that when an GPU object IRQ happens, we can pick up OP processing
322 //where we left off. !!! FIX !!!
323 #warning "Need to fix this so that when an GPU object IRQ happens, we can pick up OP processing where we left off. !!! FIX !!!"
324 void OPProcessList(int scanline, bool render)
326 extern int op_start_log;
327 // char * condition_to_str[8] =
328 // { "==", "<", ">", "(opflag set)", "(second half line)", "?", "?", "?" };
330 op_pointer = OPGetListPointer();
332 // objectp_stop_reading_list = false;
334 //WriteLog("OP: Processing line #%u (OLP=%08X)...\n", scanline, op_pointer);
337 // *** BEGIN OP PROCESSOR TESTING ONLY ***
338 extern bool interactiveMode;
340 extern int objectPtr;
342 int bitmapCounter = 0;
343 // *** END OP PROCESSOR TESTING ONLY ***
345 uint32 opCyclesToRun = 10000; // This is a pulled-out-of-the-air value (will need to be fixed, obviously!)
347 // if (op_pointer) WriteLog(" new op list at 0x%.8x scanline %i\n",op_pointer,scanline);
350 // *** BEGIN OP PROCESSOR TESTING ONLY ***
351 if (interactiveMode && bitmapCounter == objectPtr)
355 // *** END OP PROCESSOR TESTING ONLY ***
356 // if (objectp_stop_reading_list)
359 uint64 p0 = OPLoadPhrase(op_pointer);
360 //WriteLog("\t%08X type %i\n", op_pointer, (uint8)p0 & 0x07);
364 if (scanline == TOMGetVDB() && op_start_log)
365 //if (scanline == 215 && op_start_log)
366 //if (scanline == 28 && op_start_log)
369 WriteLog("%08X --> phrase %08X %08X", op_pointer - 8, (int)(p0>>32), (int)(p0&0xFFFFFFFF));
370 if ((p0 & 0x07) == OBJECT_TYPE_BITMAP)
372 WriteLog(" (BITMAP) ");
373 uint64 p1 = OPLoadPhrase(op_pointer);
374 WriteLog("\n%08X --> phrase %08X %08X ", op_pointer, (int)(p1>>32), (int)(p1&0xFFFFFFFF));
375 uint8 bitdepth = (p1 >> 12) & 0x07;
376 //WAS: int16 ypos = ((p0 >> 3) & 0x3FF); // ??? What if not interlaced (/2)?
377 int16 ypos = ((p0 >> 3) & 0x7FF); // ??? What if not interlaced (/2)?
378 int32 xpos = p1 & 0xFFF;
379 xpos = (xpos & 0x800 ? xpos | 0xFFFFF000 : xpos);
380 uint32 iwidth = ((p1 >> 28) & 0x3FF);
381 uint32 dwidth = ((p1 >> 18) & 0x3FF); // Unsigned!
382 uint16 height = ((p0 >> 14) & 0x3FF);
383 uint32 link = ((p0 >> 24) & 0x7FFFF) << 3;
384 uint32 ptr = ((p0 >> 43) & 0x1FFFFF) << 3;
385 uint32 firstPix = (p1 >> 49) & 0x3F;
386 uint8 flags = (p1 >> 45) & 0x0F;
387 uint8 idx = (p1 >> 38) & 0x7F;
388 uint32 pitch = (p1 >> 15) & 0x07;
389 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",
390 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);
392 if ((p0 & 0x07) == OBJECT_TYPE_SCALE)
394 WriteLog(" (SCALED BITMAP)");
395 uint64 p1 = OPLoadPhrase(op_pointer), p2 = OPLoadPhrase(op_pointer+8);
396 WriteLog("\n%08X --> phrase %08X %08X ", op_pointer, (int)(p1>>32), (int)(p1&0xFFFFFFFF));
397 WriteLog("\n%08X --> phrase %08X %08X ", op_pointer+8, (int)(p2>>32), (int)(p2&0xFFFFFFFF));
398 uint8 bitdepth = (p1 >> 12) & 0x07;
399 //WAS: int16 ypos = ((p0 >> 3) & 0x3FF); // ??? What if not interlaced (/2)?
400 int16 ypos = ((p0 >> 3) & 0x7FF); // ??? What if not interlaced (/2)?
401 int32 xpos = p1 & 0xFFF;
402 xpos = (xpos & 0x800 ? xpos | 0xFFFFF000 : xpos);
403 uint32 iwidth = ((p1 >> 28) & 0x3FF);
404 uint32 dwidth = ((p1 >> 18) & 0x3FF); // Unsigned!
405 uint16 height = ((p0 >> 14) & 0x3FF);
406 uint32 link = ((p0 >> 24) & 0x7FFFF) << 3;
407 uint32 ptr = ((p0 >> 43) & 0x1FFFFF) << 3;
408 uint32 firstPix = (p1 >> 49) & 0x3F;
409 uint8 flags = (p1 >> 45) & 0x0F;
410 uint8 idx = (p1 >> 38) & 0x7F;
411 uint32 pitch = (p1 >> 15) & 0x07;
412 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",
413 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);
414 uint32 hscale = p2 & 0xFF;
415 uint32 vscale = (p2 >> 8) & 0xFF;
416 uint32 remainder = (p2 >> 16) & 0xFF;
417 WriteLog(" [hsc: %02X, vsc: %02X, rem: %02X]\n", hscale, vscale, remainder);
419 if ((p0 & 0x07) == OBJECT_TYPE_GPU)
420 WriteLog(" (GPU)\n");
421 if ((p0 & 0x07) == OBJECT_TYPE_BRANCH)
423 WriteLog(" (BRANCH)\n");
424 uint8 * jaguarMainRam = GetRamPtr();
425 WriteLog("[RAM] --> ");
426 for(int k=0; k<8; k++)
427 WriteLog("%02X ", jaguarMainRam[op_pointer-8 + k]);
430 if ((p0 & 0x07) == OBJECT_TYPE_STOP)
431 WriteLog(" --> List end\n\n");
435 switch ((uint8)p0 & 0x07)
437 case OBJECT_TYPE_BITMAP:
439 //WAS: uint16 ypos = (p0 >> 3) & 0x3FF;
440 uint16 ypos = (p0 >> 3) & 0x7FF;
441 // This is only theory implied by Rayman...!
442 // It seems that if the YPOS is zero, then bump the YPOS value so that it coincides with
443 // the VDB value. With interlacing, this would be slightly more tricky.
444 // There's probably another bit somewhere that enables this mode--but so far, doesn't seem
445 // to affect any other game in a negative way (that I've seen).
446 // Either that, or it's an undocumented bug...
448 //No, the reason this was needed is that the OP code before was wrong. Any value
449 //less than VDB will get written to the top line of the display!
451 // Not so sure... Let's see what happens here...
454 ypos = TOMReadWord(0xF00046, OP) / 2; // Get the VDB value
456 // Actually, no. Any item less than VDB will get only the lines that hang over VDB displayed.
457 // So we need to fix this somehow...
459 uint32 height = (p0 & 0xFFC000) >> 14;
460 uint32 oldOPP = op_pointer - 8;
461 // *** BEGIN OP PROCESSOR TESTING ONLY ***
462 if (inhibit && op_start_log)
463 WriteLog("!!! ^^^ This object is INHIBITED! ^^^ !!!\n");
465 if (!inhibit) // For OP testing only!
466 // *** END OP PROCESSOR TESTING ONLY ***
467 if (scanline >= ypos && height > 0)
469 uint64 p1 = OPLoadPhrase(op_pointer);
471 //WriteLog("OP: Writing scanline %d with ypos == %d...\n", scanline, ypos);
472 //WriteLog("--> Writing %u BPP bitmap...\n", op_bitmap_bit_depth[(p1 >> 12) & 0x07]);
473 // OPProcessFixedBitmap(scanline, p0, p1, render);
474 OPProcessFixedBitmap(p0, p1, render);
478 //???Does this really happen??? Doesn't seem to work if you do this...!
479 //Probably not. Must be a bug in the documentation...!
480 // uint32 link = (p0 & 0x7FFFF000000) >> 21;
481 // SET16(tom_ram_8, 0x20, link & 0xFFFF); // OLP
482 // SET16(tom_ram_8, 0x22, link >> 16);
483 /* uint32 height = (p0 & 0xFFC000) >> 14;
486 // NOTE: Would subtract 2 if in interlaced mode...!
487 // uint64 height = ((p0 & 0xFFC000) - 0x4000) & 0xFFC000;
491 uint64 data = (p0 & 0xFFFFF80000000000LL) >> 40;
492 uint64 dwidth = (p1 & 0xFFC0000) >> 15;
495 p0 &= ~0xFFFFF80000FFC000LL; // Mask out old data...
496 p0 |= (uint64)height << 14;
498 OPStorePhrase(oldOPP, p0);
500 //WriteLog("\t\tOld OP: %08X -> ", op_pointer);
501 //Temp, for testing...
502 //No doubt, this type of check will break all kinds of stuff... !!! FIX !!!
503 //And it does! !!! FIX !!!
504 //Let's remove this "fix" since it screws up more than it fixes.
505 /* if (op_pointer > ((p0 & 0x000007FFFF000000LL) >> 21))
508 op_pointer = (p0 & 0x000007FFFF000000LL) >> 21;
509 //WriteLog("New OP: %08X\n", op_pointer);
512 case OBJECT_TYPE_SCALE:
514 //WAS: uint16 ypos = (p0 >> 3) & 0x3FF;
515 uint16 ypos = (p0 >> 3) & 0x7FF;
516 uint32 height = (p0 & 0xFFC000) >> 14;
517 uint32 oldOPP = op_pointer - 8;
518 //WriteLog("OP: Scaled Object (ypos=%04X, height=%04X", ypos, height);
519 // *** BEGIN OP PROCESSOR TESTING ONLY ***
520 if (inhibit && op_start_log)
522 WriteLog("!!! ^^^ This object is INHIBITED! ^^^ !!! (scanline=%u, ypos=%u, height=%u)\n", scanline, ypos, height);
523 DumpScaledObject(p0, OPLoadPhrase(op_pointer), OPLoadPhrase(op_pointer+8));
526 if (!inhibit) // For OP testing only!
527 // *** END OP PROCESSOR TESTING ONLY ***
528 if (scanline >= ypos && height > 0)
530 uint64 p1 = OPLoadPhrase(op_pointer);
532 uint64 p2 = OPLoadPhrase(op_pointer);
534 //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));
535 OPProcessScaledBitmap(p0, p1, p2, render);
539 uint16 remainder = (p2 >> 16) & 0xFF;//, vscale = p2 >> 8;
540 uint8 /*remainder = p2 >> 16,*/ vscale = p2 >> 8;
541 //Actually, we should skip this object if it has a vscale of zero.
542 //Or do we? Not sure... Atari Karts has a few lines that look like:
544 //000E8268 --> phrase 00010000 7000B00D
545 // [7 (0) x 1 @ (13, 0) (8 bpp), l: 000E82A0, p: 000E0FC0 fp: 00, fl:RELEASE, idx:00, pt:01]
546 // [hsc: 9A, vsc: 00, rem: 00]
547 // Could it be the vscale is overridden if the DWIDTH is zero? Hmm...
548 //WriteLog("OP: Scaled bitmap processing (rem=%02X, vscale=%02X)...\n", remainder, vscale);//*/
551 vscale = 0x20; // OP bug??? Nope, it isn't...! Or is it?
553 //extern int start_logging;
555 // WriteLog("--> Returned from scaled bitmap processing (rem=%02X, vscale=%02X)...\n", remainder, vscale);//*/
557 //--> Returned from scaled bitmap processing (rem=20, vscale=80)...
558 //There are other problems here, it looks like...
560 //About to execute OP (508)...
562 OP: Scaled bitmap 4x? 4bpp at 38,? hscale=7C fpix=0 data=00075E28 pitch 1 hflipped=no dwidth=? (linked to 00071118) Transluency=no
563 --> Returned from scaled bitmap processing (rem=50, vscale=7C)...
564 OP: Scaled bitmap 4x? 4bpp at 38,? hscale=7C fpix=0 data=00075E28 pitch 1 hflipped=no dwidth=? (linked to 00071118) Transluency=no
565 --> Returned from scaled bitmap processing (rem=30, vscale=7C)...
566 OP: Scaled bitmap 4x? 4bpp at 38,? hscale=7C fpix=0 data=00075E28 pitch 1 hflipped=no dwidth=? (linked to 00071118) Transluency=no
567 --> Returned from scaled bitmap processing (rem=10, vscale=7C)...
568 OP: Scaled bitmap 4x? 4bpp at 36,? hscale=7E fpix=0 data=000756A8 pitch 1 hflipped=no dwidth=? (linked to 00073058) Transluency=no
569 --> Returned from scaled bitmap processing (rem=00, vscale=7E)...
570 OP: Scaled bitmap 4x? 4bpp at 34,? hscale=80 fpix=0 data=000756C8 pitch 1 hflipped=no dwidth=? (linked to 00073078) Transluency=no
571 --> Returned from scaled bitmap processing (rem=00, vscale=80)...
572 OP: Scaled bitmap 4x? 4bpp at 36,? hscale=7E fpix=0 data=000756C8 pitch 1 hflipped=no dwidth=? (linked to 00073058) Transluency=no
573 --> Returned from scaled bitmap processing (rem=5E, vscale=7E)...
574 OP: Scaled bitmap 4x? 4bpp at 34,? hscale=80 fpix=0 data=000756E8 pitch 1 hflipped=no dwidth=? (linked to 00073078) Transluency=no
575 --> Returned from scaled bitmap processing (rem=60, vscale=80)...
576 OP: Scaled bitmap 4x? 4bpp at 36,? hscale=7E fpix=0 data=000756C8 pitch 1 hflipped=no dwidth=? (linked to 00073058) Transluency=no
577 --> Returned from scaled bitmap processing (rem=3E, vscale=7E)...
578 OP: Scaled bitmap 4x? 4bpp at 34,? hscale=80 fpix=0 data=000756E8 pitch 1 hflipped=no dwidth=? (linked to 00073078) Transluency=no
579 --> Returned from scaled bitmap processing (rem=40, vscale=80)...
580 OP: Scaled bitmap 4x? 4bpp at 36,? hscale=7E fpix=0 data=000756C8 pitch 1 hflipped=no dwidth=? (linked to 00073058) Transluency=no
581 --> Returned from scaled bitmap processing (rem=1E, vscale=7E)...
582 OP: Scaled bitmap 4x? 4bpp at 34,? hscale=80 fpix=0 data=000756E8 pitch 1 hflipped=no dwidth=? (linked to 00073078) Transluency=no
583 --> Returned from scaled bitmap processing (rem=20, vscale=80)...
585 //Here's another problem:
586 // [hsc: 20, vsc: 20, rem: 00]
587 // Since we're not checking for $E0 (but that's what we get from the above), we end
588 // up repeating this scanline unnecessarily... !!! FIX !!! [DONE, but... still not quite
589 // right. Either that, or the Accolade team that wrote Bubsy screwed up royal.]
590 //Also note: $E0 = 7.0 which IS a legal vscale value...
592 // if (remainder & 0x80) // I.e., it's negative
593 // if ((remainder & 0x80) || remainder == 0) // I.e., it's <= 0
594 // if ((remainder - 1) >= 0xE0) // I.e., it's <= 0
595 // if ((remainder >= 0xE1) || remainder == 0)// I.e., it's <= 0
596 // if ((remainder >= 0xE1 && remainder <= 0xFF) || remainder == 0)// I.e., it's <= 0
597 // if (remainder <= 0x20) // I.e., it's <= 1.0
598 // I.e., it's < 1.0f -> means it'll go negative when we subtract 1.0f.
599 if (remainder < 0x20)
601 uint64 data = (p0 & 0xFFFFF80000000000LL) >> 40;
602 uint64 dwidth = (p1 & 0xFFC0000) >> 15;
604 // while (remainder & 0x80)
605 // while ((remainder & 0x80) || remainder == 0)
606 // while ((remainder - 1) >= 0xE0)
607 // while ((remainder >= 0xE1) || remainder == 0)
608 // while ((remainder >= 0xE1 && remainder <= 0xFF) || remainder == 0)
609 // while (remainder <= 0x20)
610 while (remainder < 0x20)
620 p0 &= ~0xFFFFF80000FFC000LL; // Mask out old data...
621 p0 |= (uint64)height << 14;
623 OPStorePhrase(oldOPP, p0);
626 remainder -= 0x20; // 1.0f in [3.5] fixed point format
629 // WriteLog("--> Finished writebacks...\n");//*/
631 //WriteLog(" [%08X%08X -> ", (uint32)(p2>>32), (uint32)(p2&0xFFFFFFFF));
632 p2 &= ~0x0000000000FF0000LL;
633 p2 |= (uint64)remainder << 16;
634 //WriteLog("%08X%08X]\n", (uint32)(p2>>32), (uint32)(p2&0xFFFFFFFF));
635 OPStorePhrase(oldOPP + 16, p2);
636 //remainder = (uint8)(p2 >> 16), vscale = (uint8)(p2 >> 8);
637 //WriteLog(" [after]: rem=%02X, vscale=%02X\n", remainder, vscale);
640 op_pointer = (p0 & 0x000007FFFF000000LL) >> 21;
643 case OBJECT_TYPE_GPU:
645 //WriteLog("OP: Asserting GPU IRQ #3...\n");
646 #warning "Need to fix OP GPU IRQ handling! !!! FIX !!!"
647 OPSetCurrentObject(p0);
648 GPUSetIRQLine(3, ASSERT_LINE);
649 //Also, OP processing is suspended from this point until OBF (F00026) is written to...
652 //OPSuspendedByGPU = true;
653 //Dunno if the OP keeps processing from where it was interrupted, or if it just continues
654 //on the next scanline...
655 // --> It continues from where it was interrupted! !!! FIX !!!
658 case OBJECT_TYPE_BRANCH:
660 uint16 ypos = (p0 >> 3) & 0x7FF;
661 uint8 cc = (p0 >> 14) & 0x03;
662 uint32 link = (p0 >> 21) & 0x3FFFF8;
664 // if ((ypos!=507)&&(ypos!=25))
665 // WriteLog("\t%i%s%i link=0x%.8x\n",scanline,condition_to_str[cc],ypos>>1,link);
668 case CONDITION_EQUAL:
669 if (TOMReadWord(0xF00006, OP) == ypos || ypos == 0x7FF)
672 case CONDITION_LESS_THAN:
673 if (TOMReadWord(0xF00006, OP) < ypos)
676 case CONDITION_GREATER_THAN:
677 if (TOMReadWord(0xF00006, OP) > ypos)
680 case CONDITION_OP_FLAG_SET:
681 if (OPGetStatusRegister() & 0x01)
684 case CONDITION_SECOND_HALF_LINE:
685 // This basically means branch if bit 10 of HC is set
686 #warning "Unhandled condition code causes emulator to crash... !!! FIX !!!"
687 WriteLog("OP: Unexpected CONDITION_SECOND_HALF_LINE in BRANCH object\nOP: shuting down\n");
692 WriteLog("OP: Unimplemented branch condition %i\n", cc);
696 case OBJECT_TYPE_STOP:
700 //WriteLog("OP: --> STOP\n");
701 // op_set_status_register(((p0>>3) & 0xFFFFFFFF));
702 //This seems more likely...
703 OPSetCurrentObject(p0);
707 TOMSetPendingObjectInt();
708 if (TOMIRQEnabled(IRQ_OPFLAG))// && jaguar_interrupt_handler_is_valid(64))
709 m68k_set_irq(7); // Cause an NMI to occur...
716 WriteLog("op: unknown object type %i\n", ((uint8)p0 & 0x07));
720 // Here is a little sanity check to keep the OP from locking up the machine
721 // when fed bad data. Better would be to count how many actual cycles it used
722 // and bail out/reenter to properly simulate an overloaded OP... !!! FIX !!!
723 #warning "Better would be to count how many actual cycles it used and bail out/reenter to properly simulate an overloaded OP... !!! FIX !!!"
731 // Store fixed size bitmap in line buffer
733 void OPProcessFixedBitmap(uint64 p0, uint64 p1, bool render)
735 // Need to make sure that when writing that it stays within the line buffer...
736 // LBUF ($F01800 - $F01D9E) 360 x 32-bit RAM
737 uint8 depth = (p1 >> 12) & 0x07; // Color depth of image
738 int32 xpos = ((int16)((p1 << 4) & 0xFFFF)) >> 4;// Image xpos in LBUF
739 uint32 iwidth = (p1 >> 28) & 0x3FF; // Image width in *phrases*
740 uint32 data = (p0 >> 40) & 0xFFFFF8; // Pixel data address
741 //#ifdef OP_DEBUG_BMP
742 uint32 firstPix = (p1 >> 49) & 0x3F;
743 // "The LSB is significant only for scaled objects..." -JTRM
744 // "In 1 BPP mode, all five bits are significant. In 2 BPP mode, the top four are significant..."
747 // We can ignore the RELEASE (high order) bit for now--probably forever...!
748 // uint8 flags = (p1 >> 45) & 0x0F; // REFLECT, RMW, TRANS, RELEASE
749 //Optimize: break these out to their own BOOL values
750 uint8 flags = (p1 >> 45) & 0x07; // REFLECT (0), RMW (1), TRANS (2)
751 bool flagREFLECT = (flags & OPFLAG_REFLECT ? true : false),
752 flagRMW = (flags & OPFLAG_RMW ? true : false),
753 flagTRANS = (flags & OPFLAG_TRANS ? true : false);
754 // "For images with 1 to 4 bits/pixel the top 7 to 4 bits of the index
755 // provide the most significant bits of the palette address."
756 uint8 index = (p1 >> 37) & 0xFE; // CLUT index offset (upper pix, 1-4 bpp)
757 uint32 pitch = (p1 >> 15) & 0x07; // Phrase pitch
758 pitch <<= 3; // Optimization: Multiply pitch by 8
760 // int16 scanlineWidth = tom_getVideoModeWidth();
761 uint8 * tomRam8 = TOMGetRamPointer();
762 uint8 * paletteRAM = &tomRam8[0x400];
763 // This is OK as long as it's used correctly: For 16-bit RAM to RAM direct copies--NOT
764 // for use when using endian-corrected data (i.e., any of the *_word_read functions!)
765 uint16 * paletteRAM16 = (uint16 *)paletteRAM;
767 // WriteLog("bitmap %ix? %ibpp at %i,? firstpix=? data=0x%.8x pitch %i hflipped=%s dwidth=? (linked to ?) RMW=%s Tranparent=%s\n",
768 // iwidth, op_bitmap_bit_depth[bitdepth], xpos, ptr, pitch, (flags&OPFLAG_REFLECT ? "yes" : "no"), (flags&OPFLAG_RMW ? "yes" : "no"), (flags&OPFLAG_TRANS ? "yes" : "no"));
770 // Is it OK to have a 0 for the data width??? (i.e., undocumented?)
771 // Seems to be... Seems that dwidth *can* be zero (i.e., reuse same line) as well.
772 // Pitch == 0 is OK too...
773 // if (!render || op_pointer == 0 || ptr == 0 || pitch == 0)
774 //I'm not convinced that we need to concern ourselves with data & op_pointer here either!
775 if (!render || iwidth == 0)
778 //#define OP_DEBUG_BMP
779 //#ifdef OP_DEBUG_BMP
780 // 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",
781 // 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"));
784 // int32 leftMargin = xpos, rightMargin = (xpos + (phraseWidthToPixels[depth] * iwidth)) - 1;
785 int32 startPos = xpos, endPos = xpos +
786 (!flagREFLECT ? (phraseWidthToPixels[depth] * iwidth) - 1
787 : -((phraseWidthToPixels[depth] * iwidth) + 1));
788 uint32 clippedWidth = 0, phraseClippedWidth = 0, dataClippedWidth = 0;//, phrasePixel = 0;
789 bool in24BPPMode = (((GET16(tomRam8, 0x0028) >> 1) & 0x03) == 1 ? true : false); // VMODE
790 // Not sure if this is Jaguar Two only location or what...
791 // From the docs, it is... If we want to limit here we should think of something else.
792 // int32 limit = GET16(tom_ram_8, 0x0008); // LIMIT
794 int32 lbufWidth = (!in24BPPMode ? limit - 1 : (limit / 2) - 1); // Zero based limit...
796 // If the image is completely to the left or right of the line buffer, then bail.
797 //If in REFLECT mode, then these values are swapped! !!! FIX !!! [DONE]
798 //There are four possibilities:
799 // 1. image sits on left edge and no REFLECT; starts out of bounds but ends in bounds.
800 // 2. image sits on left edge and REFLECT; starts in bounds but ends out of bounds.
801 // 3. image sits on right edge and REFLECT; starts out of bounds but ends in bounds.
802 // 4. image sits on right edge and no REFLECT; starts in bounds but ends out of bounds.
803 //Numbers 2 & 4 can be caught by checking the LBUF clip while in the inner loop,
804 // numbers 1 & 3 are of concern.
805 // This *indirectly* handles only cases 2 & 4! And is WRONG is REFLECT is set...!
806 // if (rightMargin < 0 || leftMargin > lbufWidth)
808 // It might be easier to swap these (if REFLECTed) and just use XPOS down below...
809 // That way, you could simply set XPOS to leftMargin if !REFLECT and to rightMargin otherwise.
810 // Still have to be careful with the DATA and IWIDTH values though...
812 // if ((!flagREFLECT && (rightMargin < 0 || leftMargin > lbufWidth))
813 // || (flagREFLECT && (leftMargin < 0 || rightMargin > lbufWidth)))
815 if ((!flagREFLECT && (endPos < 0 || startPos > lbufWidth))
816 || (flagREFLECT && (startPos < 0 || endPos > lbufWidth)))
819 // Otherwise, find the clip limits and clip the phrase as well...
820 // NOTE: I'm fudging here by letting the actual blit overstep the bounds of the
821 // line buffer, but it shouldn't matter since there are two unused line
822 // buffers below and nothing above and I'll at most write 8 bytes outside
823 // the line buffer... I could use a fractional clip begin/end value, but
824 // this makes the blit a *lot* more hairy. I might fix this in the future
825 // if it becomes necessary. (JLH)
826 // Probably wouldn't be *that* hairy. Just use a delta that tells the inner loop
827 // which pixel in the phrase is being written, and quit when either end of phrases
828 // is reached or line buffer extents are surpassed.
830 //This stuff is probably wrong as well... !!! FIX !!!
831 //The strange thing is that it seems to work, but that's no guarantee that it's bulletproof!
832 //Yup. Seems that JagMania doesn't work correctly with this...
833 //Dunno if this is the problem, but Atari Karts is showing *some* of the road now...
838 clippedWidth = 0 - leftMargin,
839 phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth],
840 leftMargin = 0 - (clippedWidth % phraseWidthToPixels[depth]);
843 if (rightMargin > lbufWidth)
844 clippedWidth = rightMargin - lbufWidth,
845 phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth];//,
846 // rightMargin = lbufWidth + (clippedWidth % phraseWidthToPixels[depth]);
847 // rightMargin = lbufWidth;
850 WriteLog("OP: We're about to encounter a divide by zero error!\n");
851 // NOTE: We're just using endPos to figure out how much, if any, to clip by.
852 // ALSO: There may be another case where we start out of bounds and end out of bounds...!
854 if (startPos < 0) // Case #1: Begin out, end in, L to R
855 clippedWidth = 0 - startPos,
856 dataClippedWidth = phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth],
857 startPos = 0 - (clippedWidth % phraseWidthToPixels[depth]);
859 if (endPos < 0) // Case #2: Begin in, end out, R to L
860 clippedWidth = 0 - endPos,
861 phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth];
863 if (endPos > lbufWidth) // Case #3: Begin in, end out, L to R
864 clippedWidth = endPos - lbufWidth,
865 phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth];
867 if (startPos > lbufWidth) // Case #4: Begin out, end in, R to L
868 clippedWidth = startPos - lbufWidth,
869 dataClippedWidth = phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth],
870 startPos = lbufWidth + (clippedWidth % phraseWidthToPixels[depth]);
872 // If the image is sitting on the line buffer left or right edge, we need to compensate
873 // by decreasing the image phrase width accordingly.
874 iwidth -= phraseClippedWidth;
876 // Also, if we're clipping the phrase we need to make sure we're in the correct part of
878 // data += phraseClippedWidth * (pitch << 3);
879 data += dataClippedWidth * pitch;
881 // NOTE: When the bitmap is in REFLECT mode, the XPOS marks the *right* side of the
882 // bitmap! This makes clipping & etc. MUCH, much easier...!
883 // uint32 lbufAddress = 0x1800 + (!in24BPPMode ? leftMargin * 2 : leftMargin * 4);
884 //Why does this work right when multiplying startPos by 2 (instead of 4) for 24 BPP mode?
885 //Is this a bug in the OP?
886 uint32 lbufAddress = 0x1800 + (!in24BPPMode ? startPos * 2 : startPos * 2);
887 uint8 * currentLineBuffer = &tomRam8[lbufAddress];
891 // Hmm. We check above for 24 BPP mode, but don't do anything about it below...
892 // If we *were* in 24 BPP mode, how would you convert CRY to RGB24? Seems to me
893 // that if you're in CRY mode then you wouldn't be able to use 24 BPP bitmaps
895 // This seems to be the case (at least according to the Midsummer docs)...!
897 if (depth == 0) // 1 BPP
899 // The LSB of flags is OPFLAG_REFLECT, so sign extend it and or 2 into it.
900 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
902 // Fetch 1st phrase...
903 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
904 //Note that firstPix should only be honored *if* we start with the 1st phrase of the bitmap
905 //i.e., we didn't clip on the margin... !!! FIX !!!
906 pixels <<= firstPix; // Skip first N pixels (N=firstPix)...
907 int i = firstPix; // Start counter at right spot...
913 uint8 bit = pixels >> 63;
914 if (flagTRANS && bit == 0)
919 //Optimize: Set palleteRAM16 to beginning of palette RAM + index*2 and use only [bit] as index...
920 //Won't optimize RMW case though...
921 // This is the *only* correct use of endian-dependent code
922 // (i.e., mem-to-mem direct copying)!
923 *(uint16 *)currentLineBuffer = paletteRAM16[index | bit];
926 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bit) << 1]),
927 *(currentLineBuffer + 1) =
928 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bit) << 1) + 1]);
931 currentLineBuffer += lbufDelta;
935 // Fetch next phrase...
937 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
940 else if (depth == 1) // 2 BPP
943 WriteLog("OP: Fixed bitmap @ 2 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
944 index &= 0xFC; // Top six bits form CLUT index
945 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
946 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
951 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
954 for(int i=0; i<32; i++)
956 uint8 bits = pixels >> 62;
957 // Seems to me that both of these are in the same endian, so we could cast it as
958 // uint16 * and do straight across copies (what about 24 bpp? Treat it differently...)
959 // This only works for the palettized modes (1 - 8 BPP), since we actually have to
960 // copy data from memory in 16 BPP mode (or does it? Isn't this the same as the CLUT case?)
961 // No, it isn't because we read the memory in an endian safe way--this *won't* work...
962 if (flagTRANS && bits == 0)
967 *(uint16 *)currentLineBuffer = paletteRAM16[index | bits];
970 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bits) << 1]),
971 *(currentLineBuffer + 1) =
972 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bits) << 1) + 1]);
975 currentLineBuffer += lbufDelta;
980 else if (depth == 2) // 4 BPP
983 WriteLog("OP: Fixed bitmap @ 4 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
984 index &= 0xF0; // Top four bits form CLUT index
985 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
986 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
991 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
994 for(int i=0; i<16; i++)
996 uint8 bits = pixels >> 60;
997 // Seems to me that both of these are in the same endian, so we could cast it as
998 // uint16 * and do straight across copies (what about 24 bpp? Treat it differently...)
999 // This only works for the palettized modes (1 - 8 BPP), since we actually have to
1000 // copy data from memory in 16 BPP mode (or does it? Isn't this the same as the CLUT case?)
1001 // No, it isn't because we read the memory in an endian safe way--this *won't* work...
1002 if (flagTRANS && bits == 0)
1007 *(uint16 *)currentLineBuffer = paletteRAM16[index | bits];
1009 *currentLineBuffer =
1010 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bits) << 1]),
1011 *(currentLineBuffer + 1) =
1012 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bits) << 1) + 1]);
1015 currentLineBuffer += lbufDelta;
1020 else if (depth == 3) // 8 BPP
1022 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
1023 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1025 // Fetch 1st phrase...
1026 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1027 //Note that firstPix should only be honored *if* we start with the 1st phrase of the bitmap
1028 //i.e., we didn't clip on the margin... !!! FIX !!!
1029 firstPix &= 0x30; // Only top two bits are valid for 8 BPP
1030 pixels <<= firstPix; // Skip first N pixels (N=firstPix)...
1031 int i = firstPix >> 3; // Start counter at right spot...
1037 uint8 bits = pixels >> 56;
1038 // Seems to me that both of these are in the same endian, so we could cast it as
1039 // uint16 * and do straight across copies (what about 24 bpp? Treat it differently...)
1040 // This only works for the palettized modes (1 - 8 BPP), since we actually have to
1041 // copy data from memory in 16 BPP mode (or does it? Isn't this the same as the CLUT case?)
1042 // No, it isn't because we read the memory in an endian safe way--this *won't* work...
1043 if (flagTRANS && bits == 0)
1048 *(uint16 *)currentLineBuffer = paletteRAM16[bits];
1050 *currentLineBuffer =
1051 BLEND_CR(*currentLineBuffer, paletteRAM[bits << 1]),
1052 *(currentLineBuffer + 1) =
1053 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[(bits << 1) + 1]);
1056 currentLineBuffer += lbufDelta;
1060 // Fetch next phrase...
1062 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1065 else if (depth == 4) // 16 BPP
1068 WriteLog("OP: Fixed bitmap @ 16 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
1069 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
1070 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1075 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1078 for(int i=0; i<4; i++)
1080 uint8 bitsHi = pixels >> 56, bitsLo = pixels >> 48;
1081 // Seems to me that both of these are in the same endian, so we could cast it as
1082 // uint16 * and do straight across copies (what about 24 bpp? Treat it differently...)
1083 // This only works for the palettized modes (1 - 8 BPP), since we actually have to
1084 // copy data from memory in 16 BPP mode (or does it? Isn't this the same as the CLUT case?)
1085 // No, it isn't because we read the memory in an endian safe way--it *won't* work...
1086 if (flagTRANS && (bitsLo | bitsHi) == 0)
1091 *currentLineBuffer = bitsHi,
1092 *(currentLineBuffer + 1) = bitsLo;
1094 *currentLineBuffer =
1095 BLEND_CR(*currentLineBuffer, bitsHi),
1096 *(currentLineBuffer + 1) =
1097 BLEND_Y(*(currentLineBuffer + 1), bitsLo);
1100 currentLineBuffer += lbufDelta;
1105 else if (depth == 5) // 24 BPP
1107 //Looks like Iron Soldier is the only game that uses 24BPP mode...
1108 //There *might* be others...
1109 //WriteLog("OP: Writing 24 BPP bitmap!\n");
1111 WriteLog("OP: Fixed bitmap @ 24 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
1112 // Not sure, but I think RMW only works with 16 BPP and below, and only in CRY mode...
1113 // The LSB of flags is OPFLAG_REFLECT, so sign extend it and OR 4 into it.
1114 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 4) | 0x04;
1119 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1122 for(int i=0; i<2; i++)
1124 // We don't use a 32-bit var here because of endian issues...!
1125 uint8 bits3 = pixels >> 56, bits2 = pixels >> 48,
1126 bits1 = pixels >> 40, bits0 = pixels >> 32;
1128 if (flagTRANS && (bits3 | bits2 | bits1 | bits0) == 0)
1131 *currentLineBuffer = bits3,
1132 *(currentLineBuffer + 1) = bits2,
1133 *(currentLineBuffer + 2) = bits1,
1134 *(currentLineBuffer + 3) = bits0;
1136 currentLineBuffer += lbufDelta;
1144 // Store scaled bitmap in line buffer
1146 void OPProcessScaledBitmap(uint64 p0, uint64 p1, uint64 p2, bool render)
1148 // Need to make sure that when writing that it stays within the line buffer...
1149 // LBUF ($F01800 - $F01D9E) 360 x 32-bit RAM
1150 uint8 depth = (p1 >> 12) & 0x07; // Color depth of image
1151 int32 xpos = ((int16)((p1 << 4) & 0xFFFF)) >> 4;// Image xpos in LBUF
1152 uint32 iwidth = (p1 >> 28) & 0x3FF; // Image width in *phrases*
1153 uint32 data = (p0 >> 40) & 0xFFFFF8; // Pixel data address
1154 //#ifdef OP_DEBUG_BMP
1155 // Prolly should use this... Though not sure exactly how.
1156 //Use the upper bits as an offset into the phrase depending on the BPP. That's how!
1157 uint32 firstPix = (p1 >> 49) & 0x3F;
1158 //This is WEIRD! I'm sure I saw Atari Karts request 8 BPP FIRSTPIX! What happened???
1160 WriteLog("OP: FIRSTPIX != 0! (Scaled BM)\n");
1162 // We can ignore the RELEASE (high order) bit for now--probably forever...!
1163 // uint8 flags = (p1 >> 45) & 0x0F; // REFLECT, RMW, TRANS, RELEASE
1164 //Optimize: break these out to their own BOOL values [DONE]
1165 uint8 flags = (p1 >> 45) & 0x07; // REFLECT (0), RMW (1), TRANS (2)
1166 bool flagREFLECT = (flags & OPFLAG_REFLECT ? true : false),
1167 flagRMW = (flags & OPFLAG_RMW ? true : false),
1168 flagTRANS = (flags & OPFLAG_TRANS ? true : false);
1169 uint8 index = (p1 >> 37) & 0xFE; // CLUT index offset (upper pix, 1-4 bpp)
1170 uint32 pitch = (p1 >> 15) & 0x07; // Phrase pitch
1172 uint8 * tomRam8 = TOMGetRamPointer();
1173 uint8 * paletteRAM = &tomRam8[0x400];
1174 // This is OK as long as it's used correctly: For 16-bit RAM to RAM direct copies--NOT
1175 // for use when using endian-corrected data (i.e., any of the *ReadWord functions!)
1176 uint16 * paletteRAM16 = (uint16 *)paletteRAM;
1178 uint8 hscale = p2 & 0xFF;
1179 // Hmm. It seems that fixing the horizontal scale necessitated re-fixing this. Not sure why,
1180 // but seems to be consistent with the vertical scaling now (and it may turn out to be wrong!)...
1181 uint8 horizontalRemainder = hscale; // Not sure if it starts full, but seems reasonable [It's not!]
1182 // uint8 horizontalRemainder = 0; // Let's try zero! Seems to work! Yay! [No, it doesn't!]
1183 int32 scaledWidthInPixels = (iwidth * phraseWidthToPixels[depth] * hscale) >> 5;
1184 uint32 scaledPhrasePixels = (phraseWidthToPixels[depth] * hscale) >> 5;
1186 // WriteLog("bitmap %ix? %ibpp at %i,? firstpix=? data=0x%.8x pitch %i hflipped=%s dwidth=? (linked to ?) RMW=%s Tranparent=%s\n",
1187 // iwidth, op_bitmap_bit_depth[bitdepth], xpos, ptr, pitch, (flags&OPFLAG_REFLECT ? "yes" : "no"), (flags&OPFLAG_RMW ? "yes" : "no"), (flags&OPFLAG_TRANS ? "yes" : "no"));
1189 // Looks like an hscale of zero means don't draw!
1190 if (!render || iwidth == 0 || hscale == 0)
1193 /*extern int start_logging;
1195 WriteLog("OP: Scaled bitmap %ix? %ibpp at %i,? hscale=%02X fpix=%i data=%08X pitch %i hflipped=%s dwidth=? (linked to %08X) Transluency=%s\n",
1196 iwidth, op_bitmap_bit_depth[depth], xpos, hscale, firstPix, data, pitch, (flagREFLECT ? "yes" : "no"), op_pointer, (flagRMW ? "yes" : "no"));*/
1197 //#define OP_DEBUG_BMP
1198 //#ifdef OP_DEBUG_BMP
1199 // WriteLog("OP: Scaled 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",
1200 // 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"));
1203 int32 startPos = xpos, endPos = xpos +
1204 (!flagREFLECT ? scaledWidthInPixels - 1 : -(scaledWidthInPixels + 1));
1205 uint32 clippedWidth = 0, phraseClippedWidth = 0, dataClippedWidth = 0;
1206 bool in24BPPMode = (((GET16(tomRam8, 0x0028) >> 1) & 0x03) == 1 ? true : false); // VMODE
1207 // Not sure if this is Jaguar Two only location or what...
1208 // From the docs, it is... If we want to limit here we should think of something else.
1209 // int32 limit = GET16(tom_ram_8, 0x0008); // LIMIT
1211 int32 lbufWidth = (!in24BPPMode ? limit - 1 : (limit / 2) - 1); // Zero based limit...
1213 // If the image is completely to the left or right of the line buffer, then bail.
1214 //If in REFLECT mode, then these values are swapped! !!! FIX !!! [DONE]
1215 //There are four possibilities:
1216 // 1. image sits on left edge and no REFLECT; starts out of bounds but ends in bounds.
1217 // 2. image sits on left edge and REFLECT; starts in bounds but ends out of bounds.
1218 // 3. image sits on right edge and REFLECT; starts out of bounds but ends in bounds.
1219 // 4. image sits on right edge and no REFLECT; starts in bounds but ends out of bounds.
1220 //Numbers 2 & 4 can be caught by checking the LBUF clip while in the inner loop,
1221 // numbers 1 & 3 are of concern.
1222 // This *indirectly* handles only cases 2 & 4! And is WRONG if REFLECT is set...!
1223 // if (rightMargin < 0 || leftMargin > lbufWidth)
1225 // It might be easier to swap these (if REFLECTed) and just use XPOS down below...
1226 // That way, you could simply set XPOS to leftMargin if !REFLECT and to rightMargin otherwise.
1227 // Still have to be careful with the DATA and IWIDTH values though...
1229 if ((!flagREFLECT && (endPos < 0 || startPos > lbufWidth))
1230 || (flagREFLECT && (startPos < 0 || endPos > lbufWidth)))
1233 // Otherwise, find the clip limits and clip the phrase as well...
1234 // NOTE: I'm fudging here by letting the actual blit overstep the bounds of the
1235 // line buffer, but it shouldn't matter since there are two unused line
1236 // buffers below and nothing above and I'll at most write 40 bytes outside
1237 // the line buffer... I could use a fractional clip begin/end value, but
1238 // this makes the blit a *lot* more hairy. I might fix this in the future
1239 // if it becomes necessary. (JLH)
1240 // Probably wouldn't be *that* hairy. Just use a delta that tells the inner loop
1241 // which pixel in the phrase is being written, and quit when either end of phrases
1242 // is reached or line buffer extents are surpassed.
1244 //This stuff is probably wrong as well... !!! FIX !!!
1245 //The strange thing is that it seems to work, but that's no guarantee that it's bulletproof!
1246 //Yup. Seems that JagMania doesn't work correctly with this...
1247 //Dunno if this is the problem, but Atari Karts is showing *some* of the road now...
1248 //Actually, it is! Or, it was. It doesn't seem to be clipping here, so the problem lies
1249 //elsewhere! Hmm. Putting the scaling code into the 1/2/8 BPP cases seems to draw the ground
1250 // a bit more accurately... Strange!
1251 //It's probably a case of the REFLECT flag being set and the background being written
1252 //from the right side of the screen...
1253 //But no, it isn't... At least if the diagnostics are telling the truth!
1255 // NOTE: We're just using endPos to figure out how much, if any, to clip by.
1256 // ALSO: There may be another case where we start out of bounds and end out of bounds...!
1259 //There's a problem here with scaledPhrasePixels in that it can be forced to zero when
1260 //the scaling factor is small. So fix it already! !!! FIX !!!
1261 /*if (scaledPhrasePixels == 0)
1263 WriteLog("OP: [Scaled] We're about to encounter a divide by zero error!\n");
1264 DumpScaledObject(p0, p1, p2);
1266 //NOTE: I'm almost 100% sure that this is wrong... And it is! :-p
1268 //Try a simple example...
1269 // Let's say we have a 8 BPP scanline with an hscale of $80 (4). Our xpos is -10,
1270 // non-flipped. Pixels in the bitmap are XYZXYZXYZXYZXYZ.
1271 // Scaled up, they would be XXXXYYYYZZZZXXXXYYYYZZZZXXXXYYYYZZZZ...
1273 // Normally, we would expect this in the line buffer:
1274 // ZZXXXXYYYYZZZZXXXXYYYYZZZZ...
1276 // But instead we're getting:
1277 // XXXXYYYYZZZZXXXXYYYYZZZZ...
1279 // or are we??? It would seem so, simply by virtue of the fact that we're NOT starting
1280 // on negative boundary--or are we? Hmm...
1281 // cw = 10, dcw = pcw = 10 / ([8 * 4 = 32] 32) = 0, sp = -10
1283 // Let's try a real world example:
1285 //OP: Scaled bitmap (70, 8 BPP, spp=28) sp (-400) < 0... [new sp=-8, cw=400, dcw=pcw=14]
1286 //OP: Scaled bitmap (6F, 8 BPP, spp=27) sp (-395) < 0... [new sp=-17, cw=395, dcw=pcw=14]
1288 // Really, spp is 27.75 in the second case...
1289 // So... If we do 395 / 27.75, we get 14. Ok so far... If we scale that against the
1290 // start position (14 * 27.75), we get -6.5... NOT -17!
1292 //Now it seems we're working OK, at least for the first case...
1293 uint32 scaledPhrasePixelsUS = phraseWidthToPixels[depth] * hscale;
1295 if (startPos < 0) // Case #1: Begin out, end in, L to R
1297 extern int start_logging;
1299 WriteLog("OP: Scaled bitmap (%02X, %u BPP, spp=%u) start pos (%i) < 0...", hscale, op_bitmap_bit_depth[depth], scaledPhrasePixels, startPos);
1300 // clippedWidth = 0 - startPos,
1301 clippedWidth = (0 - startPos) << 5,
1302 // dataClippedWidth = phraseClippedWidth = clippedWidth / scaledPhrasePixels,
1303 dataClippedWidth = phraseClippedWidth = (clippedWidth / scaledPhrasePixelsUS) >> 5,
1304 // startPos = 0 - (clippedWidth % scaledPhrasePixels);
1305 startPos += (dataClippedWidth * scaledPhrasePixelsUS) >> 5;
1307 WriteLog(" [new sp=%i, cw=%i, dcw=pcw=%i]\n", startPos, clippedWidth, dataClippedWidth);
1310 if (endPos < 0) // Case #2: Begin in, end out, R to L
1311 clippedWidth = 0 - endPos,
1312 phraseClippedWidth = clippedWidth / scaledPhrasePixels;
1314 if (endPos > lbufWidth) // Case #3: Begin in, end out, L to R
1315 clippedWidth = endPos - lbufWidth,
1316 phraseClippedWidth = clippedWidth / scaledPhrasePixels;
1318 if (startPos > lbufWidth) // Case #4: Begin out, end in, R to L
1319 clippedWidth = startPos - lbufWidth,
1320 dataClippedWidth = phraseClippedWidth = clippedWidth / scaledPhrasePixels,
1321 startPos = lbufWidth + (clippedWidth % scaledPhrasePixels);
1323 extern int op_start_log;
1324 if (op_start_log && clippedWidth != 0)
1325 WriteLog("OP: Clipped line. SP=%i, EP=%i, clip=%u, iwidth=%u, hscale=%02X\n", startPos, endPos, clippedWidth, iwidth, hscale);
1326 if (op_start_log && startPos == 13)
1328 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);
1329 DumpScaledObject(p0, p1, p2);
1332 WriteLog(" %08X: ", data);
1333 for(int i=0; i<7*8; i++)
1334 WriteLog("%02X ", JaguarReadByte(data+i));
1338 // If the image is sitting on the line buffer left or right edge, we need to compensate
1339 // by decreasing the image phrase width accordingly.
1340 iwidth -= phraseClippedWidth;
1342 // Also, if we're clipping the phrase we need to make sure we're in the correct part of
1344 // data += phraseClippedWidth * (pitch << 3);
1345 data += dataClippedWidth * (pitch << 3);
1347 // NOTE: When the bitmap is in REFLECT mode, the XPOS marks the *right* side of the
1348 // bitmap! This makes clipping & etc. MUCH, much easier...!
1349 // uint32 lbufAddress = 0x1800 + (!in24BPPMode ? leftMargin * 2 : leftMargin * 4);
1350 // uint32 lbufAddress = 0x1800 + (!in24BPPMode ? startPos * 2 : startPos * 4);
1351 uint32 lbufAddress = 0x1800 + startPos * 2;
1352 uint8 * currentLineBuffer = &tomRam8[lbufAddress];
1353 //uint8 * lineBufferLowerLimit = &tom_ram_8[0x1800],
1354 // * lineBufferUpperLimit = &tom_ram_8[0x1800 + 719];
1358 // Hmm. We check above for 24 BPP mode, but don't do anything about it below...
1359 // If we *were* in 24 BPP mode, how would you convert CRY to RGB24? Seems to me
1360 // that if you're in CRY mode then you wouldn't be able to use 24 BPP bitmaps
1362 // This seems to be the case (at least according to the Midsummer docs)...!
1364 if (depth == 0) // 1 BPP
1367 WriteLog("OP: Scaled bitmap @ 1 BPP requesting FIRSTPIX!\n");
1368 // The LSB of flags is OPFLAG_REFLECT, so sign extend it and or 2 into it.
1369 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1372 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1374 while ((int32)iwidth > 0)
1376 uint8 bits = pixels >> 63;
1378 if (flagTRANS && bits == 0)
1383 // This is the *only* correct use of endian-dependent code
1384 // (i.e., mem-to-mem direct copying)!
1385 *(uint16 *)currentLineBuffer = paletteRAM16[index | bits];
1387 *currentLineBuffer =
1388 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bits) << 1]),
1389 *(currentLineBuffer + 1) =
1390 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bits) << 1) + 1]);
1393 currentLineBuffer += lbufDelta;
1395 /* horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1396 while (horizontalRemainder & 0x80)
1398 horizontalRemainder += hscale;
1402 while (horizontalRemainder <= 0x20) // I.e., it's <= 0 (*before* subtraction)
1404 horizontalRemainder += hscale;
1408 horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1412 int phrasesToSkip = pixCount / 64, pixelShift = pixCount % 64;
1414 data += (pitch << 3) * phrasesToSkip;
1415 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1416 pixels <<= 1 * pixelShift;
1417 iwidth -= phrasesToSkip;
1418 pixCount = pixelShift;
1422 else if (depth == 1) // 2 BPP
1425 WriteLog("OP: Scaled bitmap @ 2 BPP requesting FIRSTPIX!\n");
1426 index &= 0xFC; // Top six bits form CLUT index
1427 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
1428 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1431 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1433 while ((int32)iwidth > 0)
1435 uint8 bits = pixels >> 62;
1437 if (flagTRANS && bits == 0)
1442 // This is the *only* correct use of endian-dependent code
1443 // (i.e., mem-to-mem direct copying)!
1444 *(uint16 *)currentLineBuffer = paletteRAM16[index | bits];
1446 *currentLineBuffer =
1447 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bits) << 1]),
1448 *(currentLineBuffer + 1) =
1449 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bits) << 1) + 1]);
1452 currentLineBuffer += lbufDelta;
1454 /* horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1455 while (horizontalRemainder & 0x80)
1457 horizontalRemainder += hscale;
1461 while (horizontalRemainder <= 0x20) // I.e., it's <= 0 (*before* subtraction)
1463 horizontalRemainder += hscale;
1467 horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1471 int phrasesToSkip = pixCount / 32, pixelShift = pixCount % 32;
1473 data += (pitch << 3) * phrasesToSkip;
1474 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1475 pixels <<= 2 * pixelShift;
1476 iwidth -= phrasesToSkip;
1477 pixCount = pixelShift;
1481 else if (depth == 2) // 4 BPP
1484 WriteLog("OP: Scaled bitmap @ 4 BPP requesting FIRSTPIX!\n");
1485 index &= 0xF0; // Top four bits form CLUT index
1486 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
1487 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1490 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1492 while ((int32)iwidth > 0)
1494 uint8 bits = pixels >> 60;
1496 if (flagTRANS && bits == 0)
1501 // This is the *only* correct use of endian-dependent code
1502 // (i.e., mem-to-mem direct copying)!
1503 *(uint16 *)currentLineBuffer = paletteRAM16[index | bits];
1505 *currentLineBuffer =
1506 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bits) << 1]),
1507 *(currentLineBuffer + 1) =
1508 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bits) << 1) + 1]);
1511 currentLineBuffer += lbufDelta;
1513 /* horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1514 while (horizontalRemainder & 0x80)
1516 horizontalRemainder += hscale;
1520 while (horizontalRemainder <= 0x20) // I.e., it's <= 0 (*before* subtraction)
1522 horizontalRemainder += hscale;
1526 horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1530 int phrasesToSkip = pixCount / 16, pixelShift = pixCount % 16;
1532 data += (pitch << 3) * phrasesToSkip;
1533 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1534 pixels <<= 4 * pixelShift;
1535 iwidth -= phrasesToSkip;
1536 pixCount = pixelShift;
1540 else if (depth == 3) // 8 BPP
1543 WriteLog("OP: Scaled bitmap @ 8 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
1544 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
1545 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1548 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1550 while ((int32)iwidth > 0)
1552 uint8 bits = pixels >> 56;
1554 if (flagTRANS && bits == 0)
1559 // This is the *only* correct use of endian-dependent code
1560 // (i.e., mem-to-mem direct copying)!
1561 *(uint16 *)currentLineBuffer = paletteRAM16[bits];
1563 if (currentLineBuffer >= lineBufferLowerLimit && currentLineBuffer <= lineBufferUpperLimit)
1564 *(uint16 *)currentLineBuffer = paletteRAM16[bits];
1567 *currentLineBuffer =
1568 BLEND_CR(*currentLineBuffer, paletteRAM[bits << 1]),
1569 *(currentLineBuffer + 1) =
1570 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[(bits << 1) + 1]);
1573 currentLineBuffer += lbufDelta;
1575 while (horizontalRemainder <= 0x20) // I.e., it's <= 0 (*before* subtraction)
1577 horizontalRemainder += hscale;
1581 horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1585 int phrasesToSkip = pixCount / 8, pixelShift = pixCount % 8;
1587 data += (pitch << 3) * phrasesToSkip;
1588 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1589 pixels <<= 8 * pixelShift;
1590 iwidth -= phrasesToSkip;
1591 pixCount = pixelShift;
1595 else if (depth == 4) // 16 BPP
1598 WriteLog("OP: Scaled bitmap @ 16 BPP requesting FIRSTPIX!\n");
1599 // The LSB is OPFLAG_REFLECT, so sign extend it and OR 2 into it.
1600 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1603 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1605 while ((int32)iwidth > 0)
1607 uint8 bitsHi = pixels >> 56, bitsLo = pixels >> 48;
1609 if (flagTRANS && (bitsLo | bitsHi) == 0)
1614 *currentLineBuffer = bitsHi,
1615 *(currentLineBuffer + 1) = bitsLo;
1617 *currentLineBuffer =
1618 BLEND_CR(*currentLineBuffer, bitsHi),
1619 *(currentLineBuffer + 1) =
1620 BLEND_Y(*(currentLineBuffer + 1), bitsLo);
1623 currentLineBuffer += lbufDelta;
1625 /* horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1626 while (horizontalRemainder & 0x80)
1628 horizontalRemainder += hscale;
1632 while (horizontalRemainder <= 0x20) // I.e., it's <= 0 (*before* subtraction)
1634 horizontalRemainder += hscale;
1638 horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1642 int phrasesToSkip = pixCount / 4, pixelShift = pixCount % 4;
1644 data += (pitch << 3) * phrasesToSkip;
1645 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1646 pixels <<= 16 * pixelShift;
1648 iwidth -= phrasesToSkip;
1650 pixCount = pixelShift;
1654 else if (depth == 5) // 24 BPP
1656 //I'm not sure that you can scale a 24 BPP bitmap properly--the JTRM seem to indicate as much.
1657 WriteLog("OP: Writing 24 BPP scaled bitmap!\n");
1659 WriteLog("OP: Scaled bitmap @ 24 BPP requesting FIRSTPIX!\n");
1660 // Not sure, but I think RMW only works with 16 BPP and below, and only in CRY mode...
1661 // The LSB is OPFLAG_REFLECT, so sign extend it and or 4 into it.
1662 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 4) | 0x04;
1667 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1668 data += pitch << 3; // Multiply pitch * 8 (optimize: precompute this value)
1670 for(int i=0; i<2; i++)
1672 uint8 bits3 = pixels >> 56, bits2 = pixels >> 48,
1673 bits1 = pixels >> 40, bits0 = pixels >> 32;
1675 if (flagTRANS && (bits3 | bits2 | bits1 | bits0) == 0)
1678 *currentLineBuffer = bits3,
1679 *(currentLineBuffer + 1) = bits2,
1680 *(currentLineBuffer + 2) = bits1,
1681 *(currentLineBuffer + 3) = bits0;
1683 currentLineBuffer += lbufDelta;