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... (and it has... in tom.cpp :-P)
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 // We need to check whether these interrupts are enabled or not, THEN
708 // set an IRQ + pending flag if necessary...
709 if (TOMIRQEnabled(IRQ_OPFLAG))
711 TOMSetPendingObjectInt();
712 m68k_set_irq(2); // Cause a 68K IPL 2 to occur...
720 WriteLog("op: unknown object type %i\n", ((uint8)p0 & 0x07));
724 // Here is a little sanity check to keep the OP from locking up the machine
725 // when fed bad data. Better would be to count how many actual cycles it used
726 // and bail out/reenter to properly simulate an overloaded OP... !!! FIX !!!
727 #warning "Better would be to count how many actual cycles it used and bail out/reenter to properly simulate an overloaded OP... !!! FIX !!!"
735 // Store fixed size bitmap in line buffer
737 void OPProcessFixedBitmap(uint64 p0, uint64 p1, bool render)
739 // Need to make sure that when writing that it stays within the line buffer...
740 // LBUF ($F01800 - $F01D9E) 360 x 32-bit RAM
741 uint8 depth = (p1 >> 12) & 0x07; // Color depth of image
742 int32 xpos = ((int16)((p1 << 4) & 0xFFFF)) >> 4;// Image xpos in LBUF
743 uint32 iwidth = (p1 >> 28) & 0x3FF; // Image width in *phrases*
744 uint32 data = (p0 >> 40) & 0xFFFFF8; // Pixel data address
745 //#ifdef OP_DEBUG_BMP
746 uint32 firstPix = (p1 >> 49) & 0x3F;
747 // "The LSB is significant only for scaled objects..." -JTRM
748 // "In 1 BPP mode, all five bits are significant. In 2 BPP mode, the top four are significant..."
751 // We can ignore the RELEASE (high order) bit for now--probably forever...!
752 // uint8 flags = (p1 >> 45) & 0x0F; // REFLECT, RMW, TRANS, RELEASE
753 //Optimize: break these out to their own BOOL values
754 uint8 flags = (p1 >> 45) & 0x07; // REFLECT (0), RMW (1), TRANS (2)
755 bool flagREFLECT = (flags & OPFLAG_REFLECT ? true : false),
756 flagRMW = (flags & OPFLAG_RMW ? true : false),
757 flagTRANS = (flags & OPFLAG_TRANS ? true : false);
758 // "For images with 1 to 4 bits/pixel the top 7 to 4 bits of the index
759 // provide the most significant bits of the palette address."
760 uint8 index = (p1 >> 37) & 0xFE; // CLUT index offset (upper pix, 1-4 bpp)
761 uint32 pitch = (p1 >> 15) & 0x07; // Phrase pitch
762 pitch <<= 3; // Optimization: Multiply pitch by 8
764 // int16 scanlineWidth = tom_getVideoModeWidth();
765 uint8 * tomRam8 = TOMGetRamPointer();
766 uint8 * paletteRAM = &tomRam8[0x400];
767 // This is OK as long as it's used correctly: For 16-bit RAM to RAM direct copies--NOT
768 // for use when using endian-corrected data (i.e., any of the *_word_read functions!)
769 uint16 * paletteRAM16 = (uint16 *)paletteRAM;
771 // WriteLog("bitmap %ix? %ibpp at %i,? firstpix=? data=0x%.8x pitch %i hflipped=%s dwidth=? (linked to ?) RMW=%s Tranparent=%s\n",
772 // iwidth, op_bitmap_bit_depth[bitdepth], xpos, ptr, pitch, (flags&OPFLAG_REFLECT ? "yes" : "no"), (flags&OPFLAG_RMW ? "yes" : "no"), (flags&OPFLAG_TRANS ? "yes" : "no"));
774 // Is it OK to have a 0 for the data width??? (i.e., undocumented?)
775 // Seems to be... Seems that dwidth *can* be zero (i.e., reuse same line) as well.
776 // Pitch == 0 is OK too...
777 // if (!render || op_pointer == 0 || ptr == 0 || pitch == 0)
778 //I'm not convinced that we need to concern ourselves with data & op_pointer here either!
779 if (!render || iwidth == 0)
782 //#define OP_DEBUG_BMP
783 //#ifdef OP_DEBUG_BMP
784 // 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",
785 // 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"));
788 // int32 leftMargin = xpos, rightMargin = (xpos + (phraseWidthToPixels[depth] * iwidth)) - 1;
789 int32 startPos = xpos, endPos = xpos +
790 (!flagREFLECT ? (phraseWidthToPixels[depth] * iwidth) - 1
791 : -((phraseWidthToPixels[depth] * iwidth) + 1));
792 uint32 clippedWidth = 0, phraseClippedWidth = 0, dataClippedWidth = 0;//, phrasePixel = 0;
793 bool in24BPPMode = (((GET16(tomRam8, 0x0028) >> 1) & 0x03) == 1 ? true : false); // VMODE
794 // Not sure if this is Jaguar Two only location or what...
795 // From the docs, it is... If we want to limit here we should think of something else.
796 // int32 limit = GET16(tom_ram_8, 0x0008); // LIMIT
798 int32 lbufWidth = (!in24BPPMode ? limit - 1 : (limit / 2) - 1); // Zero based limit...
800 // If the image is completely to the left or right of the line buffer, then bail.
801 //If in REFLECT mode, then these values are swapped! !!! FIX !!! [DONE]
802 //There are four possibilities:
803 // 1. image sits on left edge and no REFLECT; starts out of bounds but ends in bounds.
804 // 2. image sits on left edge and REFLECT; starts in bounds but ends out of bounds.
805 // 3. image sits on right edge and REFLECT; starts out of bounds but ends in bounds.
806 // 4. image sits on right edge and no REFLECT; starts in bounds but ends out of bounds.
807 //Numbers 2 & 4 can be caught by checking the LBUF clip while in the inner loop,
808 // numbers 1 & 3 are of concern.
809 // This *indirectly* handles only cases 2 & 4! And is WRONG is REFLECT is set...!
810 // if (rightMargin < 0 || leftMargin > lbufWidth)
812 // It might be easier to swap these (if REFLECTed) and just use XPOS down below...
813 // That way, you could simply set XPOS to leftMargin if !REFLECT and to rightMargin otherwise.
814 // Still have to be careful with the DATA and IWIDTH values though...
816 // if ((!flagREFLECT && (rightMargin < 0 || leftMargin > lbufWidth))
817 // || (flagREFLECT && (leftMargin < 0 || rightMargin > lbufWidth)))
819 if ((!flagREFLECT && (endPos < 0 || startPos > lbufWidth))
820 || (flagREFLECT && (startPos < 0 || endPos > lbufWidth)))
823 // Otherwise, find the clip limits and clip the phrase as well...
824 // NOTE: I'm fudging here by letting the actual blit overstep the bounds of the
825 // line buffer, but it shouldn't matter since there are two unused line
826 // buffers below and nothing above and I'll at most write 8 bytes outside
827 // the line buffer... I could use a fractional clip begin/end value, but
828 // this makes the blit a *lot* more hairy. I might fix this in the future
829 // if it becomes necessary. (JLH)
830 // Probably wouldn't be *that* hairy. Just use a delta that tells the inner loop
831 // which pixel in the phrase is being written, and quit when either end of phrases
832 // is reached or line buffer extents are surpassed.
834 //This stuff is probably wrong as well... !!! FIX !!!
835 //The strange thing is that it seems to work, but that's no guarantee that it's bulletproof!
836 //Yup. Seems that JagMania doesn't work correctly with this...
837 //Dunno if this is the problem, but Atari Karts is showing *some* of the road now...
842 clippedWidth = 0 - leftMargin,
843 phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth],
844 leftMargin = 0 - (clippedWidth % phraseWidthToPixels[depth]);
847 if (rightMargin > lbufWidth)
848 clippedWidth = rightMargin - lbufWidth,
849 phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth];//,
850 // rightMargin = lbufWidth + (clippedWidth % phraseWidthToPixels[depth]);
851 // rightMargin = lbufWidth;
854 WriteLog("OP: We're about to encounter a divide by zero error!\n");
855 // NOTE: We're just using endPos to figure out how much, if any, to clip by.
856 // ALSO: There may be another case where we start out of bounds and end out of bounds...!
858 if (startPos < 0) // Case #1: Begin out, end in, L to R
859 clippedWidth = 0 - startPos,
860 dataClippedWidth = phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth],
861 startPos = 0 - (clippedWidth % phraseWidthToPixels[depth]);
863 if (endPos < 0) // Case #2: Begin in, end out, R to L
864 clippedWidth = 0 - endPos,
865 phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth];
867 if (endPos > lbufWidth) // Case #3: Begin in, end out, L to R
868 clippedWidth = endPos - lbufWidth,
869 phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth];
871 if (startPos > lbufWidth) // Case #4: Begin out, end in, R to L
872 clippedWidth = startPos - lbufWidth,
873 dataClippedWidth = phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth],
874 startPos = lbufWidth + (clippedWidth % phraseWidthToPixels[depth]);
876 // If the image is sitting on the line buffer left or right edge, we need to compensate
877 // by decreasing the image phrase width accordingly.
878 iwidth -= phraseClippedWidth;
880 // Also, if we're clipping the phrase we need to make sure we're in the correct part of
882 // data += phraseClippedWidth * (pitch << 3);
883 data += dataClippedWidth * pitch;
885 // NOTE: When the bitmap is in REFLECT mode, the XPOS marks the *right* side of the
886 // bitmap! This makes clipping & etc. MUCH, much easier...!
887 // uint32 lbufAddress = 0x1800 + (!in24BPPMode ? leftMargin * 2 : leftMargin * 4);
888 //Why does this work right when multiplying startPos by 2 (instead of 4) for 24 BPP mode?
889 //Is this a bug in the OP?
890 uint32 lbufAddress = 0x1800 + (!in24BPPMode ? startPos * 2 : startPos * 2);
891 uint8 * currentLineBuffer = &tomRam8[lbufAddress];
895 // Hmm. We check above for 24 BPP mode, but don't do anything about it below...
896 // If we *were* in 24 BPP mode, how would you convert CRY to RGB24? Seems to me
897 // that if you're in CRY mode then you wouldn't be able to use 24 BPP bitmaps
899 // This seems to be the case (at least according to the Midsummer docs)...!
901 if (depth == 0) // 1 BPP
903 // The LSB of flags is OPFLAG_REFLECT, so sign extend it and or 2 into it.
904 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
906 // Fetch 1st phrase...
907 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
908 //Note that firstPix should only be honored *if* we start with the 1st phrase of the bitmap
909 //i.e., we didn't clip on the margin... !!! FIX !!!
910 pixels <<= firstPix; // Skip first N pixels (N=firstPix)...
911 int i = firstPix; // Start counter at right spot...
917 uint8 bit = pixels >> 63;
918 if (flagTRANS && bit == 0)
923 //Optimize: Set palleteRAM16 to beginning of palette RAM + index*2 and use only [bit] as index...
924 //Won't optimize RMW case though...
925 // This is the *only* correct use of endian-dependent code
926 // (i.e., mem-to-mem direct copying)!
927 *(uint16 *)currentLineBuffer = paletteRAM16[index | bit];
930 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bit) << 1]),
931 *(currentLineBuffer + 1) =
932 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bit) << 1) + 1]);
935 currentLineBuffer += lbufDelta;
939 // Fetch next phrase...
941 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
944 else if (depth == 1) // 2 BPP
947 WriteLog("OP: Fixed bitmap @ 2 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
948 index &= 0xFC; // Top six bits form CLUT index
949 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
950 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
955 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
958 for(int i=0; i<32; i++)
960 uint8 bits = pixels >> 62;
961 // Seems to me that both of these are in the same endian, so we could cast it as
962 // uint16 * and do straight across copies (what about 24 bpp? Treat it differently...)
963 // This only works for the palettized modes (1 - 8 BPP), since we actually have to
964 // copy data from memory in 16 BPP mode (or does it? Isn't this the same as the CLUT case?)
965 // No, it isn't because we read the memory in an endian safe way--this *won't* work...
966 if (flagTRANS && bits == 0)
971 *(uint16 *)currentLineBuffer = paletteRAM16[index | bits];
974 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bits) << 1]),
975 *(currentLineBuffer + 1) =
976 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bits) << 1) + 1]);
979 currentLineBuffer += lbufDelta;
984 else if (depth == 2) // 4 BPP
987 WriteLog("OP: Fixed bitmap @ 4 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
988 index &= 0xF0; // Top four bits form CLUT index
989 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
990 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
995 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
998 for(int i=0; i<16; i++)
1000 uint8 bits = pixels >> 60;
1001 // Seems to me that both of these are in the same endian, so we could cast it as
1002 // uint16 * and do straight across copies (what about 24 bpp? Treat it differently...)
1003 // This only works for the palettized modes (1 - 8 BPP), since we actually have to
1004 // copy data from memory in 16 BPP mode (or does it? Isn't this the same as the CLUT case?)
1005 // No, it isn't because we read the memory in an endian safe way--this *won't* work...
1006 if (flagTRANS && bits == 0)
1011 *(uint16 *)currentLineBuffer = paletteRAM16[index | bits];
1013 *currentLineBuffer =
1014 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bits) << 1]),
1015 *(currentLineBuffer + 1) =
1016 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bits) << 1) + 1]);
1019 currentLineBuffer += lbufDelta;
1024 else if (depth == 3) // 8 BPP
1026 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
1027 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1029 // Fetch 1st phrase...
1030 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1031 //Note that firstPix should only be honored *if* we start with the 1st phrase of the bitmap
1032 //i.e., we didn't clip on the margin... !!! FIX !!!
1033 firstPix &= 0x30; // Only top two bits are valid for 8 BPP
1034 pixels <<= firstPix; // Skip first N pixels (N=firstPix)...
1035 int i = firstPix >> 3; // Start counter at right spot...
1041 uint8 bits = pixels >> 56;
1042 // Seems to me that both of these are in the same endian, so we could cast it as
1043 // uint16 * and do straight across copies (what about 24 bpp? Treat it differently...)
1044 // This only works for the palettized modes (1 - 8 BPP), since we actually have to
1045 // copy data from memory in 16 BPP mode (or does it? Isn't this the same as the CLUT case?)
1046 // No, it isn't because we read the memory in an endian safe way--this *won't* work...
1047 if (flagTRANS && bits == 0)
1052 *(uint16 *)currentLineBuffer = paletteRAM16[bits];
1054 *currentLineBuffer =
1055 BLEND_CR(*currentLineBuffer, paletteRAM[bits << 1]),
1056 *(currentLineBuffer + 1) =
1057 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[(bits << 1) + 1]);
1060 currentLineBuffer += lbufDelta;
1064 // Fetch next phrase...
1066 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1069 else if (depth == 4) // 16 BPP
1072 WriteLog("OP: Fixed bitmap @ 16 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
1073 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
1074 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1079 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1082 for(int i=0; i<4; i++)
1084 uint8 bitsHi = pixels >> 56, bitsLo = pixels >> 48;
1085 // Seems to me that both of these are in the same endian, so we could cast it as
1086 // uint16 * and do straight across copies (what about 24 bpp? Treat it differently...)
1087 // This only works for the palettized modes (1 - 8 BPP), since we actually have to
1088 // copy data from memory in 16 BPP mode (or does it? Isn't this the same as the CLUT case?)
1089 // No, it isn't because we read the memory in an endian safe way--it *won't* work...
1090 if (flagTRANS && (bitsLo | bitsHi) == 0)
1095 *currentLineBuffer = bitsHi,
1096 *(currentLineBuffer + 1) = bitsLo;
1098 *currentLineBuffer =
1099 BLEND_CR(*currentLineBuffer, bitsHi),
1100 *(currentLineBuffer + 1) =
1101 BLEND_Y(*(currentLineBuffer + 1), bitsLo);
1104 currentLineBuffer += lbufDelta;
1109 else if (depth == 5) // 24 BPP
1111 //Looks like Iron Soldier is the only game that uses 24BPP mode...
1112 //There *might* be others...
1113 //WriteLog("OP: Writing 24 BPP bitmap!\n");
1115 WriteLog("OP: Fixed bitmap @ 24 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
1116 // Not sure, but I think RMW only works with 16 BPP and below, and only in CRY mode...
1117 // The LSB of flags is OPFLAG_REFLECT, so sign extend it and OR 4 into it.
1118 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 4) | 0x04;
1123 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1126 for(int i=0; i<2; i++)
1128 // We don't use a 32-bit var here because of endian issues...!
1129 uint8 bits3 = pixels >> 56, bits2 = pixels >> 48,
1130 bits1 = pixels >> 40, bits0 = pixels >> 32;
1132 if (flagTRANS && (bits3 | bits2 | bits1 | bits0) == 0)
1135 *currentLineBuffer = bits3,
1136 *(currentLineBuffer + 1) = bits2,
1137 *(currentLineBuffer + 2) = bits1,
1138 *(currentLineBuffer + 3) = bits0;
1140 currentLineBuffer += lbufDelta;
1148 // Store scaled bitmap in line buffer
1150 void OPProcessScaledBitmap(uint64 p0, uint64 p1, uint64 p2, bool render)
1152 // Need to make sure that when writing that it stays within the line buffer...
1153 // LBUF ($F01800 - $F01D9E) 360 x 32-bit RAM
1154 uint8 depth = (p1 >> 12) & 0x07; // Color depth of image
1155 int32 xpos = ((int16)((p1 << 4) & 0xFFFF)) >> 4;// Image xpos in LBUF
1156 uint32 iwidth = (p1 >> 28) & 0x3FF; // Image width in *phrases*
1157 uint32 data = (p0 >> 40) & 0xFFFFF8; // Pixel data address
1158 //#ifdef OP_DEBUG_BMP
1159 // Prolly should use this... Though not sure exactly how.
1160 //Use the upper bits as an offset into the phrase depending on the BPP. That's how!
1161 uint32 firstPix = (p1 >> 49) & 0x3F;
1162 //This is WEIRD! I'm sure I saw Atari Karts request 8 BPP FIRSTPIX! What happened???
1164 WriteLog("OP: FIRSTPIX != 0! (Scaled BM)\n");
1166 // We can ignore the RELEASE (high order) bit for now--probably forever...!
1167 // uint8 flags = (p1 >> 45) & 0x0F; // REFLECT, RMW, TRANS, RELEASE
1168 //Optimize: break these out to their own BOOL values [DONE]
1169 uint8 flags = (p1 >> 45) & 0x07; // REFLECT (0), RMW (1), TRANS (2)
1170 bool flagREFLECT = (flags & OPFLAG_REFLECT ? true : false),
1171 flagRMW = (flags & OPFLAG_RMW ? true : false),
1172 flagTRANS = (flags & OPFLAG_TRANS ? true : false);
1173 uint8 index = (p1 >> 37) & 0xFE; // CLUT index offset (upper pix, 1-4 bpp)
1174 uint32 pitch = (p1 >> 15) & 0x07; // Phrase pitch
1176 uint8 * tomRam8 = TOMGetRamPointer();
1177 uint8 * paletteRAM = &tomRam8[0x400];
1178 // This is OK as long as it's used correctly: For 16-bit RAM to RAM direct copies--NOT
1179 // for use when using endian-corrected data (i.e., any of the *ReadWord functions!)
1180 uint16 * paletteRAM16 = (uint16 *)paletteRAM;
1182 uint16 hscale = p2 & 0xFF;
1183 // Hmm. It seems that fixing the horizontal scale necessitated re-fixing this. Not sure why,
1184 // but seems to be consistent with the vertical scaling now (and it may turn out to be wrong!)...
1185 uint16 horizontalRemainder = hscale; // Not sure if it starts full, but seems reasonable [It's not!]
1186 // uint8 horizontalRemainder = 0; // Let's try zero! Seems to work! Yay! [No, it doesn't!]
1187 int32 scaledWidthInPixels = (iwidth * phraseWidthToPixels[depth] * hscale) >> 5;
1188 uint32 scaledPhrasePixels = (phraseWidthToPixels[depth] * hscale) >> 5;
1190 // WriteLog("bitmap %ix? %ibpp at %i,? firstpix=? data=0x%.8x pitch %i hflipped=%s dwidth=? (linked to ?) RMW=%s Tranparent=%s\n",
1191 // iwidth, op_bitmap_bit_depth[bitdepth], xpos, ptr, pitch, (flags&OPFLAG_REFLECT ? "yes" : "no"), (flags&OPFLAG_RMW ? "yes" : "no"), (flags&OPFLAG_TRANS ? "yes" : "no"));
1193 // Looks like an hscale of zero means don't draw!
1194 if (!render || iwidth == 0 || hscale == 0)
1197 /*extern int start_logging;
1199 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",
1200 iwidth, op_bitmap_bit_depth[depth], xpos, hscale, firstPix, data, pitch, (flagREFLECT ? "yes" : "no"), op_pointer, (flagRMW ? "yes" : "no"));*/
1201 //#define OP_DEBUG_BMP
1202 //#ifdef OP_DEBUG_BMP
1203 // 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",
1204 // 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"));
1207 int32 startPos = xpos, endPos = xpos +
1208 (!flagREFLECT ? scaledWidthInPixels - 1 : -(scaledWidthInPixels + 1));
1209 uint32 clippedWidth = 0, phraseClippedWidth = 0, dataClippedWidth = 0;
1210 bool in24BPPMode = (((GET16(tomRam8, 0x0028) >> 1) & 0x03) == 1 ? true : false); // VMODE
1211 // Not sure if this is Jaguar Two only location or what...
1212 // From the docs, it is... If we want to limit here we should think of something else.
1213 // int32 limit = GET16(tom_ram_8, 0x0008); // LIMIT
1215 int32 lbufWidth = (!in24BPPMode ? limit - 1 : (limit / 2) - 1); // Zero based limit...
1217 // If the image is completely to the left or right of the line buffer, then bail.
1218 //If in REFLECT mode, then these values are swapped! !!! FIX !!! [DONE]
1219 //There are four possibilities:
1220 // 1. image sits on left edge and no REFLECT; starts out of bounds but ends in bounds.
1221 // 2. image sits on left edge and REFLECT; starts in bounds but ends out of bounds.
1222 // 3. image sits on right edge and REFLECT; starts out of bounds but ends in bounds.
1223 // 4. image sits on right edge and no REFLECT; starts in bounds but ends out of bounds.
1224 //Numbers 2 & 4 can be caught by checking the LBUF clip while in the inner loop,
1225 // numbers 1 & 3 are of concern.
1226 // This *indirectly* handles only cases 2 & 4! And is WRONG if REFLECT is set...!
1227 // if (rightMargin < 0 || leftMargin > lbufWidth)
1229 // It might be easier to swap these (if REFLECTed) and just use XPOS down below...
1230 // That way, you could simply set XPOS to leftMargin if !REFLECT and to rightMargin otherwise.
1231 // Still have to be careful with the DATA and IWIDTH values though...
1233 if ((!flagREFLECT && (endPos < 0 || startPos > lbufWidth))
1234 || (flagREFLECT && (startPos < 0 || endPos > lbufWidth)))
1237 // Otherwise, find the clip limits and clip the phrase as well...
1238 // NOTE: I'm fudging here by letting the actual blit overstep the bounds of the
1239 // line buffer, but it shouldn't matter since there are two unused line
1240 // buffers below and nothing above and I'll at most write 40 bytes outside
1241 // the line buffer... I could use a fractional clip begin/end value, but
1242 // this makes the blit a *lot* more hairy. I might fix this in the future
1243 // if it becomes necessary. (JLH)
1244 // Probably wouldn't be *that* hairy. Just use a delta that tells the inner loop
1245 // which pixel in the phrase is being written, and quit when either end of phrases
1246 // is reached or line buffer extents are surpassed.
1248 //This stuff is probably wrong as well... !!! FIX !!!
1249 //The strange thing is that it seems to work, but that's no guarantee that it's bulletproof!
1250 //Yup. Seems that JagMania doesn't work correctly with this...
1251 //Dunno if this is the problem, but Atari Karts is showing *some* of the road now...
1252 //Actually, it is! Or, it was. It doesn't seem to be clipping here, so the problem lies
1253 //elsewhere! Hmm. Putting the scaling code into the 1/2/8 BPP cases seems to draw the ground
1254 // a bit more accurately... Strange!
1255 //It's probably a case of the REFLECT flag being set and the background being written
1256 //from the right side of the screen...
1257 //But no, it isn't... At least if the diagnostics are telling the truth!
1259 // NOTE: We're just using endPos to figure out how much, if any, to clip by.
1260 // ALSO: There may be another case where we start out of bounds and end out of bounds...!
1263 //There's a problem here with scaledPhrasePixels in that it can be forced to zero when
1264 //the scaling factor is small. So fix it already! !!! FIX !!!
1265 /*if (scaledPhrasePixels == 0)
1267 WriteLog("OP: [Scaled] We're about to encounter a divide by zero error!\n");
1268 DumpScaledObject(p0, p1, p2);
1270 //NOTE: I'm almost 100% sure that this is wrong... And it is! :-p
1272 //Try a simple example...
1273 // Let's say we have a 8 BPP scanline with an hscale of $80 (4). Our xpos is -10,
1274 // non-flipped. Pixels in the bitmap are XYZXYZXYZXYZXYZ.
1275 // Scaled up, they would be XXXXYYYYZZZZXXXXYYYYZZZZXXXXYYYYZZZZ...
1277 // Normally, we would expect this in the line buffer:
1278 // ZZXXXXYYYYZZZZXXXXYYYYZZZZ...
1280 // But instead we're getting:
1281 // XXXXYYYYZZZZXXXXYYYYZZZZ...
1283 // or are we??? It would seem so, simply by virtue of the fact that we're NOT starting
1284 // on negative boundary--or are we? Hmm...
1285 // cw = 10, dcw = pcw = 10 / ([8 * 4 = 32] 32) = 0, sp = -10
1287 // Let's try a real world example:
1289 //OP: Scaled bitmap (70, 8 BPP, spp=28) sp (-400) < 0... [new sp=-8, cw=400, dcw=pcw=14]
1290 //OP: Scaled bitmap (6F, 8 BPP, spp=27) sp (-395) < 0... [new sp=-17, cw=395, dcw=pcw=14]
1292 // Really, spp is 27.75 in the second case...
1293 // So... If we do 395 / 27.75, we get 14. Ok so far... If we scale that against the
1294 // start position (14 * 27.75), we get -6.5... NOT -17!
1296 //Now it seems we're working OK, at least for the first case...
1297 uint32 scaledPhrasePixelsUS = phraseWidthToPixels[depth] * hscale;
1299 if (startPos < 0) // Case #1: Begin out, end in, L to R
1301 extern int start_logging;
1303 WriteLog("OP: Scaled bitmap (%02X, %u BPP, spp=%u) start pos (%i) < 0...", hscale, op_bitmap_bit_depth[depth], scaledPhrasePixels, startPos);
1304 // clippedWidth = 0 - startPos,
1305 clippedWidth = (0 - startPos) << 5,
1306 // dataClippedWidth = phraseClippedWidth = clippedWidth / scaledPhrasePixels,
1307 dataClippedWidth = phraseClippedWidth = (clippedWidth / scaledPhrasePixelsUS) >> 5,
1308 // startPos = 0 - (clippedWidth % scaledPhrasePixels);
1309 startPos += (dataClippedWidth * scaledPhrasePixelsUS) >> 5;
1311 WriteLog(" [new sp=%i, cw=%i, dcw=pcw=%i]\n", startPos, clippedWidth, dataClippedWidth);
1314 if (endPos < 0) // Case #2: Begin in, end out, R to L
1315 clippedWidth = 0 - endPos,
1316 phraseClippedWidth = clippedWidth / scaledPhrasePixels;
1318 if (endPos > lbufWidth) // Case #3: Begin in, end out, L to R
1319 clippedWidth = endPos - lbufWidth,
1320 phraseClippedWidth = clippedWidth / scaledPhrasePixels;
1322 if (startPos > lbufWidth) // Case #4: Begin out, end in, R to L
1323 clippedWidth = startPos - lbufWidth,
1324 dataClippedWidth = phraseClippedWidth = clippedWidth / scaledPhrasePixels,
1325 startPos = lbufWidth + (clippedWidth % scaledPhrasePixels);
1327 extern int op_start_log;
1328 if (op_start_log && clippedWidth != 0)
1329 WriteLog("OP: Clipped line. SP=%i, EP=%i, clip=%u, iwidth=%u, hscale=%02X\n", startPos, endPos, clippedWidth, iwidth, hscale);
1330 if (op_start_log && startPos == 13)
1332 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);
1333 DumpScaledObject(p0, p1, p2);
1336 WriteLog(" %08X: ", data);
1337 for(int i=0; i<7*8; i++)
1338 WriteLog("%02X ", JaguarReadByte(data+i));
1342 // If the image is sitting on the line buffer left or right edge, we need to compensate
1343 // by decreasing the image phrase width accordingly.
1344 iwidth -= phraseClippedWidth;
1346 // Also, if we're clipping the phrase we need to make sure we're in the correct part of
1348 // data += phraseClippedWidth * (pitch << 3);
1349 data += dataClippedWidth * (pitch << 3);
1351 // NOTE: When the bitmap is in REFLECT mode, the XPOS marks the *right* side of the
1352 // bitmap! This makes clipping & etc. MUCH, much easier...!
1353 // uint32 lbufAddress = 0x1800 + (!in24BPPMode ? leftMargin * 2 : leftMargin * 4);
1354 // uint32 lbufAddress = 0x1800 + (!in24BPPMode ? startPos * 2 : startPos * 4);
1355 uint32 lbufAddress = 0x1800 + startPos * 2;
1356 uint8 * currentLineBuffer = &tomRam8[lbufAddress];
1357 //uint8 * lineBufferLowerLimit = &tom_ram_8[0x1800],
1358 // * lineBufferUpperLimit = &tom_ram_8[0x1800 + 719];
1362 // Hmm. We check above for 24 BPP mode, but don't do anything about it below...
1363 // If we *were* in 24 BPP mode, how would you convert CRY to RGB24? Seems to me
1364 // that if you're in CRY mode then you wouldn't be able to use 24 BPP bitmaps
1366 // This seems to be the case (at least according to the Midsummer docs)...!
1368 if (depth == 0) // 1 BPP
1371 WriteLog("OP: Scaled bitmap @ 1 BPP requesting FIRSTPIX!\n");
1372 // The LSB of flags is OPFLAG_REFLECT, so sign extend it and or 2 into it.
1373 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1376 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1378 while ((int32)iwidth > 0)
1380 uint8 bits = pixels >> 63;
1382 if (flagTRANS && bits == 0)
1387 // This is the *only* correct use of endian-dependent code
1388 // (i.e., mem-to-mem direct copying)!
1389 *(uint16 *)currentLineBuffer = paletteRAM16[index | bits];
1391 *currentLineBuffer =
1392 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bits) << 1]),
1393 *(currentLineBuffer + 1) =
1394 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bits) << 1) + 1]);
1397 currentLineBuffer += lbufDelta;
1400 The reason we subtract the horizontalRemainder *after* the test is because we had too few
1401 bytes for horizontalRemainder to properly recognize a negative number. But now it's 16 bits
1402 wide, so we could probably go back to that (as long as we make it an int16 and not a uint16!)
1404 /* horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1405 while (horizontalRemainder & 0x80)
1407 horizontalRemainder += hscale;
1411 // while (horizontalRemainder <= 0x20) // I.e., it's <= 1.0 (*before* subtraction)
1412 while (horizontalRemainder < 0x20) // I.e., it's <= 1.0 (*before* subtraction)
1414 horizontalRemainder += hscale;
1418 horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1422 int phrasesToSkip = pixCount / 64, pixelShift = pixCount % 64;
1424 data += (pitch << 3) * phrasesToSkip;
1425 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1426 pixels <<= 1 * pixelShift;
1427 iwidth -= phrasesToSkip;
1428 pixCount = pixelShift;
1432 else if (depth == 1) // 2 BPP
1435 WriteLog("OP: Scaled bitmap @ 2 BPP requesting FIRSTPIX!\n");
1436 index &= 0xFC; // Top six bits form CLUT index
1437 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
1438 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1441 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1443 while ((int32)iwidth > 0)
1445 uint8 bits = pixels >> 62;
1447 if (flagTRANS && bits == 0)
1452 // This is the *only* correct use of endian-dependent code
1453 // (i.e., mem-to-mem direct copying)!
1454 *(uint16 *)currentLineBuffer = paletteRAM16[index | bits];
1456 *currentLineBuffer =
1457 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bits) << 1]),
1458 *(currentLineBuffer + 1) =
1459 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bits) << 1) + 1]);
1462 currentLineBuffer += lbufDelta;
1464 /* horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1465 while (horizontalRemainder & 0x80)
1467 horizontalRemainder += hscale;
1471 // while (horizontalRemainder <= 0x20) // I.e., it's <= 0 (*before* subtraction)
1472 while (horizontalRemainder < 0x20) // I.e., it's <= 1.0 (*before* subtraction)
1474 horizontalRemainder += hscale;
1478 horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1482 int phrasesToSkip = pixCount / 32, pixelShift = pixCount % 32;
1484 data += (pitch << 3) * phrasesToSkip;
1485 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1486 pixels <<= 2 * pixelShift;
1487 iwidth -= phrasesToSkip;
1488 pixCount = pixelShift;
1492 else if (depth == 2) // 4 BPP
1495 WriteLog("OP: Scaled bitmap @ 4 BPP requesting FIRSTPIX!\n");
1496 index &= 0xF0; // Top four bits form CLUT index
1497 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
1498 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1501 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1503 while ((int32)iwidth > 0)
1505 uint8 bits = pixels >> 60;
1507 if (flagTRANS && bits == 0)
1512 // This is the *only* correct use of endian-dependent code
1513 // (i.e., mem-to-mem direct copying)!
1514 *(uint16 *)currentLineBuffer = paletteRAM16[index | bits];
1516 *currentLineBuffer =
1517 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bits) << 1]),
1518 *(currentLineBuffer + 1) =
1519 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bits) << 1) + 1]);
1522 currentLineBuffer += lbufDelta;
1524 /* horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1525 while (horizontalRemainder & 0x80)
1527 horizontalRemainder += hscale;
1531 // while (horizontalRemainder <= 0x20) // I.e., it's <= 0 (*before* subtraction)
1532 while (horizontalRemainder < 0x20) // I.e., it's <= 0 (*before* subtraction)
1534 horizontalRemainder += hscale;
1538 horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1542 int phrasesToSkip = pixCount / 16, pixelShift = pixCount % 16;
1544 data += (pitch << 3) * phrasesToSkip;
1545 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1546 pixels <<= 4 * pixelShift;
1547 iwidth -= phrasesToSkip;
1548 pixCount = pixelShift;
1552 else if (depth == 3) // 8 BPP
1555 WriteLog("OP: Scaled bitmap @ 8 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
1556 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
1557 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1560 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1562 while ((int32)iwidth > 0)
1564 uint8 bits = pixels >> 56;
1566 if (flagTRANS && bits == 0)
1571 // This is the *only* correct use of endian-dependent code
1572 // (i.e., mem-to-mem direct copying)!
1573 *(uint16 *)currentLineBuffer = paletteRAM16[bits];
1575 if (currentLineBuffer >= lineBufferLowerLimit && currentLineBuffer <= lineBufferUpperLimit)
1576 *(uint16 *)currentLineBuffer = paletteRAM16[bits];
1579 *currentLineBuffer =
1580 BLEND_CR(*currentLineBuffer, paletteRAM[bits << 1]),
1581 *(currentLineBuffer + 1) =
1582 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[(bits << 1) + 1]);
1585 currentLineBuffer += lbufDelta;
1587 // while (horizontalRemainder <= 0x20) // I.e., it's <= 0 (*before* subtraction)
1588 while (horizontalRemainder < 0x20) // I.e., it's <= 1.0 (*before* subtraction)
1590 horizontalRemainder += hscale;
1594 horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1598 int phrasesToSkip = pixCount / 8, pixelShift = pixCount % 8;
1600 data += (pitch << 3) * phrasesToSkip;
1601 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1602 pixels <<= 8 * pixelShift;
1603 iwidth -= phrasesToSkip;
1604 pixCount = pixelShift;
1608 else if (depth == 4) // 16 BPP
1611 WriteLog("OP: Scaled bitmap @ 16 BPP requesting FIRSTPIX!\n");
1612 // The LSB is OPFLAG_REFLECT, so sign extend it and OR 2 into it.
1613 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1616 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1618 while ((int32)iwidth > 0)
1620 uint8 bitsHi = pixels >> 56, bitsLo = pixels >> 48;
1622 if (flagTRANS && (bitsLo | bitsHi) == 0)
1627 *currentLineBuffer = bitsHi,
1628 *(currentLineBuffer + 1) = bitsLo;
1630 *currentLineBuffer =
1631 BLEND_CR(*currentLineBuffer, bitsHi),
1632 *(currentLineBuffer + 1) =
1633 BLEND_Y(*(currentLineBuffer + 1), bitsLo);
1636 currentLineBuffer += lbufDelta;
1638 /* horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1639 while (horizontalRemainder & 0x80)
1641 horizontalRemainder += hscale;
1645 // while (horizontalRemainder <= 0x20) // I.e., it's <= 0 (*before* subtraction)
1646 while (horizontalRemainder < 0x20) // I.e., it's <= 1.0 (*before* subtraction)
1648 horizontalRemainder += hscale;
1652 horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1656 int phrasesToSkip = pixCount / 4, pixelShift = pixCount % 4;
1658 data += (pitch << 3) * phrasesToSkip;
1659 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1660 pixels <<= 16 * pixelShift;
1662 iwidth -= phrasesToSkip;
1664 pixCount = pixelShift;
1668 else if (depth == 5) // 24 BPP
1670 //I'm not sure that you can scale a 24 BPP bitmap properly--the JTRM seem to indicate as much.
1671 WriteLog("OP: Writing 24 BPP scaled bitmap!\n");
1673 WriteLog("OP: Scaled bitmap @ 24 BPP requesting FIRSTPIX!\n");
1674 // Not sure, but I think RMW only works with 16 BPP and below, and only in CRY mode...
1675 // The LSB is OPFLAG_REFLECT, so sign extend it and or 4 into it.
1676 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 4) | 0x04;
1681 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1682 data += pitch << 3; // Multiply pitch * 8 (optimize: precompute this value)
1684 for(int i=0; i<2; i++)
1686 uint8 bits3 = pixels >> 56, bits2 = pixels >> 48,
1687 bits1 = pixels >> 40, bits0 = pixels >> 32;
1689 if (flagTRANS && (bits3 | bits2 | bits1 | bits0) == 0)
1692 *currentLineBuffer = bits3,
1693 *(currentLineBuffer + 1) = bits2,
1694 *(currentLineBuffer + 2) = bits1,
1695 *(currentLineBuffer + 3) = bits0;
1697 currentLineBuffer += lbufDelta;