4 // Original source by Cal2
5 // GCC/SDL port by Niels Wagenaar (Linux/WIN32) and Caz (BeOS)
6 // Extensive cleanups/fixes/rewrites by James L. Hammons
15 //#define OP_DEBUG_BMP
17 #define BLEND_Y(dst, src) op_blend_y[(((uint16)dst<<8)) | ((uint16)(src))]
18 #define BLEND_CR(dst, src) op_blend_cr[(((uint16)dst)<<8) | ((uint16)(src))]
20 #define OBJECT_TYPE_BITMAP 0 // 000
21 #define OBJECT_TYPE_SCALE 1 // 001
22 #define OBJECT_TYPE_GPU 2 // 010
23 #define OBJECT_TYPE_BRANCH 3 // 011
24 #define OBJECT_TYPE_STOP 4 // 100
26 #define CONDITION_EQUAL 0
27 #define CONDITION_LESS_THAN 1
28 #define CONDITION_GREATER_THAN 2
29 #define CONDITION_OP_FLAG_SET 3
30 #define CONDITION_SECOND_HALF_LINE 4
32 #define OPFLAG_RELEASE 8 // Bus release bit
33 #define OPFLAG_TRANS 4 // Transparency bit
34 #define OPFLAG_RMW 2 // Read-Modify-Write bit
35 #define OPFLAG_REFLECT 1 // Horizontal mirror bit
37 // Private function prototypes
39 void OPProcessFixedBitmap(uint64 p0, uint64 p1, bool render);
40 void OPProcessScaledBitmap(uint64 p0, uint64 p1, uint64 p2, bool render);
41 void DumpScaledObject(uint64 p0, uint64 p1, uint64 p2);
42 void DumpFixedObject(uint64 p0, uint64 p1);
43 uint64 op_load_phrase(uint32 offset);
45 // Local global variables
47 static uint8 * op_blend_y;
48 static uint8 * op_blend_cr;
49 // There may be a problem with this "RAM" overlapping (and thus being independent of)
50 // some of the regular TOM RAM...
51 static uint8 objectp_ram[0x40]; // This is based at $F00000
52 uint8 objectp_running;
53 //bool objectp_stop_reading_list;
55 static uint8 op_bitmap_bit_depth[8] = { 1, 2, 4, 8, 16, 24, 32, 0 };
56 //static uint32 op_bitmap_bit_size[8] =
57 // { (uint32)(0.125*65536), (uint32)(0.25*65536), (uint32)(0.5*65536), (uint32)(1*65536),
58 // (uint32)(2*65536), (uint32)(1*65536), (uint32)(1*65536), (uint32)(1*65536) };
59 static uint32 op_pointer;
61 int32 phraseWidthToPixels[8] = { 64, 32, 16, 8, 4, 2, 0, 0 };
65 // Object Processor initialization
69 // Blend tables (64K each)
70 memory_malloc_secure((void **)&op_blend_y, 0x10000, "Jaguar Object processor Y blend lookup table");
71 memory_malloc_secure((void **)&op_blend_cr, 0x10000, "Jaguar Object processor CR blend lookup table");
73 // Here we calculate the saturating blend of a signed 4-bit value and an
74 // existing Cyan/Red value as well as a signed 8-bit value and an existing intensity...
75 // Note: CRY is 4 bits Cyan, 4 bits Red, 16 bits intensitY
76 for(int i=0; i<256*256; i++)
78 int y = (i >> 8) & 0xFF;
79 int dy = (INT8)i; // Sign extend the Y index
80 int c1 = (i >> 8) & 0x0F;
81 int dc1 = (INT8)(i << 4) >> 4; // Sign extend the R index
82 int c2 = (i >> 12) & 0x0F;
83 int dc2 = (INT8)(i & 0xF0) >> 4; // Sign extend the C index
103 op_blend_cr[i] = (c2 << 4) | c1;
110 // Object Processor reset
114 memset(objectp_ram, 0x00, 0x40);
121 { "(BITMAP)", "(SCALED BITMAP)", "(GPU INT)", "(BRANCH)", "(STOP)", "???", "???", "???" };
123 { "\"==\"", "\"<\"", "\">\"", "(opflag set)", "(second half line)", "?", "?", "?" };
125 uint32 olp = op_get_list_pointer();
126 WriteLog("OP: OLP = %08X\n", olp);
127 WriteLog("OP: Phrase dump\n ----------\n");
128 for(uint32 i=0; i<0x100; i+=8)
130 uint32 hi = JaguarReadLong(olp + i, OP), lo = JaguarReadLong(olp + i + 4, OP);
131 WriteLog("\t%08X: %08X %08X %s", olp + i, hi, lo, opType[lo & 0x07]);
132 if ((lo & 0x07) == 3)
134 uint16 ypos = (lo >> 3) & 0x7FF;
135 uint8 cc = (lo >> 14) & 0x03;
136 uint32 link = ((hi << 11) | (lo >> 21)) & 0x3FFFF8;
137 WriteLog(" YPOS=%u, CC=%s, link=%08X", ypos, ccType[cc], link);
140 if ((lo & 0x07) == 0)
141 DumpFixedObject(op_load_phrase(olp+i), op_load_phrase(olp+i+8));
142 if ((lo & 0x07) == 1)
143 DumpScaledObject(op_load_phrase(olp+i), op_load_phrase(olp+i+8), op_load_phrase(olp+i+16));
149 // Object Processor memory access
150 // Memory range: F00010 - F00027
152 // F00010-F00017 R xxxxxxxx xxxxxxxx OB - current object code from the graphics processor
153 // F00020-F00023 W xxxxxxxx xxxxxxxx OLP - start of the object list
154 // F00026 W -------- -------x OBF - object processor flag
157 uint8 OPReadByte(uint32 offset, uint32 who/*=UNKNOWN*/)
160 return objectp_ram[offset];
163 uint16 OPReadWord(uint32 offset, uint32 who/*=UNKNOWN*/)
166 return GET16(objectp_ram, offset);
169 void OPWriteByte(uint32 offset, uint8 data, uint32 who/*=UNKNOWN*/)
172 objectp_ram[offset] = data;
175 void OPWriteWord(uint32 offset, uint16 data, uint32 who/*=UNKNOWN*/)
178 SET16(objectp_ram, offset, data);
180 /*if (offset == 0x20)
181 WriteLog("OP: Setting lo list pointer: %04X\n", data);
183 WriteLog("OP: Setting hi list pointer: %04X\n", data);//*/
186 uint32 op_get_list_pointer(void)
188 // Note: This register is LO / HI WORD, hence the funky look of this...
189 // return (objectp_ram[0x22] << 24) | (objectp_ram[0x23] << 16) | (objectp_ram[0x20] << 8) | objectp_ram[0x21];
190 return GET16(objectp_ram, 0x20) | (GET16(objectp_ram, 0x22) << 16);
193 // This is WRONG, since the OBF is only 16 bits wide!!! [FIXED]
195 uint32 op_get_status_register(void)
197 // return (objectp_ram[0x26] << 24) | (objectp_ram[0x27] << 16) | (objectp_ram[0x28] << 8) | objectp_ram[0x29];
198 // return GET32(objectp_ram, 0x26);
199 return GET16(objectp_ram, 0x26);
202 // This is WRONG, since the OBF is only 16 bits wide!!! [FIXED]
204 void op_set_status_register(uint32 data)
206 /* objectp_ram[0x26] = (data & 0xFF000000) >> 24;
207 objectp_ram[0x27] = (data & 0x00FF0000) >> 16;
208 objectp_ram[0x28] = (data & 0x0000FF00) >> 8;
209 objectp_ram[0x29] |= (data & 0xFE);*/
210 objectp_ram[0x26] = (data & 0x0000FF00) >> 8;
211 objectp_ram[0x27] |= (data & 0xFE);
214 void op_set_current_object(uint64 object)
216 //Not sure this is right... Wouldn't it just be stored 64 bit BE?
217 // Stored as least significant 32 bits first, ms32 last in big endian
218 /* objectp_ram[0x13] = object & 0xFF; object >>= 8;
219 objectp_ram[0x12] = object & 0xFF; object >>= 8;
220 objectp_ram[0x11] = object & 0xFF; object >>= 8;
221 objectp_ram[0x10] = object & 0xFF; object >>= 8;
223 objectp_ram[0x17] = object & 0xFF; object >>= 8;
224 objectp_ram[0x16] = object & 0xFF; object >>= 8;
225 objectp_ram[0x15] = object & 0xFF; object >>= 8;
226 objectp_ram[0x14] = object & 0xFF;*/
227 // Let's try regular good old big endian...
228 objectp_ram[0x17] = object & 0xFF; object >>= 8;
229 objectp_ram[0x16] = object & 0xFF; object >>= 8;
230 objectp_ram[0x15] = object & 0xFF; object >>= 8;
231 objectp_ram[0x14] = object & 0xFF; object >>= 8;
233 objectp_ram[0x13] = object & 0xFF; object >>= 8;
234 objectp_ram[0x12] = object & 0xFF; object >>= 8;
235 objectp_ram[0x11] = object & 0xFF; object >>= 8;
236 objectp_ram[0x10] = object & 0xFF;
239 uint64 op_load_phrase(uint32 offset)
241 offset &= ~0x07; // 8 byte alignment
242 return ((uint64)JaguarReadLong(offset, OP) << 32) | (uint64)JaguarReadLong(offset+4, OP);
245 void OPStorePhrase(uint32 offset, uint64 p)
247 offset &= ~0x07; // 8 byte alignment
248 JaguarWriteLong(offset, p >> 32, OP);
249 JaguarWriteLong(offset + 4, p & 0xFFFFFFFF, OP);
253 // Debugging routines
255 void DumpScaledObject(uint64 p0, uint64 p1, uint64 p2)
257 WriteLog(" (SCALED BITMAP)");
258 WriteLog(" %08X --> phrase %08X %08X\n", op_pointer, (uint32)(p1>>32), (uint32)(p1&0xFFFFFFFF));
259 WriteLog(" %08X --> phrase %08X %08X ", op_pointer+8, (uint32)(p2>>32), (uint32)(p2&0xFFFFFFFF));
260 uint8 bitdepth = (p1 >> 12) & 0x07;
261 int16 ypos = ((p0 >> 3) & 0x3FF); // ??? What if not interlaced (/2)?
262 int32 xpos = p1 & 0xFFF;
263 xpos = (xpos & 0x800 ? xpos | 0xFFFFF000 : xpos);
264 uint32 iwidth = ((p1 >> 28) & 0x3FF);
265 uint32 dwidth = ((p1 >> 18) & 0x3FF); // Unsigned!
266 uint16 height = ((p0 >> 14) & 0x3FF);
267 uint32 link = ((p0 >> 24) & 0x7FFFF) << 3;
268 uint32 ptr = ((p0 >> 43) & 0x1FFFFF) << 3;
269 uint32 firstPix = (p1 >> 49) & 0x3F;
270 uint8 flags = (p1 >> 45) & 0x0F;
271 uint8 idx = (p1 >> 38) & 0x7F;
272 uint32 pitch = (p1 >> 15) & 0x07;
273 WriteLog("\n [%u (%u) x %u @ (%i, %u) (%u bpp), l: %08X, p: %08X fp: %02X, fl:%s%s%s%s, idx:%02X, pt:%02X]\n",
274 iwidth, dwidth, height, xpos, ypos, op_bitmap_bit_depth[bitdepth], link, ptr, firstPix, (flags&OPFLAG_REFLECT ? "REFLECT " : ""), (flags&OPFLAG_RMW ? "RMW " : ""), (flags&OPFLAG_TRANS ? "TRANS " : ""), (flags&OPFLAG_RELEASE ? "RELEASE" : ""), idx, pitch);
275 uint32 hscale = p2 & 0xFF;
276 uint32 vscale = (p2 >> 8) & 0xFF;
277 uint32 remainder = (p2 >> 16) & 0xFF;
278 WriteLog(" [hsc: %02X, vsc: %02X, rem: %02X]\n", hscale, vscale, remainder);
281 void DumpFixedObject(uint64 p0, uint64 p1)
283 WriteLog(" (BITMAP)");
284 WriteLog(" %08X --> phrase %08X %08X\n", op_pointer, (uint32)(p1>>32), (uint32)(p1&0xFFFFFFFF));
285 uint8 bitdepth = (p1 >> 12) & 0x07;
286 int16 ypos = ((p0 >> 3) & 0x3FF); // ??? What if not interlaced (/2)?
287 int32 xpos = p1 & 0xFFF;
288 xpos = (xpos & 0x800 ? xpos | 0xFFFFF000 : xpos);
289 uint32 iwidth = ((p1 >> 28) & 0x3FF);
290 uint32 dwidth = ((p1 >> 18) & 0x3FF); // Unsigned!
291 uint16 height = ((p0 >> 14) & 0x3FF);
292 uint32 link = ((p0 >> 24) & 0x7FFFF) << 3;
293 uint32 ptr = ((p0 >> 43) & 0x1FFFFF) << 3;
294 uint32 firstPix = (p1 >> 49) & 0x3F;
295 uint8 flags = (p1 >> 45) & 0x0F;
296 uint8 idx = (p1 >> 38) & 0x7F;
297 uint32 pitch = (p1 >> 15) & 0x07;
298 WriteLog(" [%u (%u) x %u @ (%i, %u) (%u bpp), l: %08X, p: %08X fp: %02X, fl:%s%s%s%s, idx:%02X, pt:%02X]\n",
299 iwidth, dwidth, height, xpos, ypos, op_bitmap_bit_depth[bitdepth], link, ptr, firstPix, (flags&OPFLAG_REFLECT ? "REFLECT " : ""), (flags&OPFLAG_RMW ? "RMW " : ""), (flags&OPFLAG_TRANS ? "TRANS " : ""), (flags&OPFLAG_RELEASE ? "RELEASE" : ""), idx, pitch);
303 // Object Processor main routine
305 //Need to fix this so that when an GPU object IRQ happens, we can pick up OP processing
306 //where we left off. !!! FIX !!!
307 void OPProcessList(int scanline, bool render)
309 extern int op_start_log;
310 // char * condition_to_str[8] =
311 // { "==", "<", ">", "(opflag set)", "(second half line)", "?", "?", "?" };
313 op_pointer = op_get_list_pointer();
315 // objectp_stop_reading_list = false;
317 // *** BEGIN OP PROCESSOR TESTING ONLY ***
318 extern bool interactiveMode;
320 extern int objectPtr;
322 int bitmapCounter = 0;
323 // *** END OP PROCESSOR TESTING ONLY ***
325 // if (op_pointer) WriteLog(" new op list at 0x%.8x scanline %i\n",op_pointer,scanline);
328 // *** BEGIN OP PROCESSOR TESTING ONLY ***
329 if (interactiveMode && bitmapCounter == objectPtr)
333 // *** END OP PROCESSOR TESTING ONLY ***
334 // if (objectp_stop_reading_list)
337 uint64 p0 = op_load_phrase(op_pointer);
339 if (scanline == tom_get_vdb() + 1 && op_start_log)
340 //if (scanline == 215 && op_start_log)
342 WriteLog("%08X --> phrase %08X %08X", op_pointer - 8, (int)(p0>>32), (int)(p0&0xFFFFFFFF));
343 if ((p0 & 0x07) == OBJECT_TYPE_BITMAP)
345 WriteLog(" (BITMAP) ");
346 uint64 p1 = op_load_phrase(op_pointer);
347 WriteLog("\n%08X --> phrase %08X %08X ", op_pointer, (int)(p1>>32), (int)(p1&0xFFFFFFFF));
348 uint8 bitdepth = (p1 >> 12) & 0x07;
349 int16 ypos = ((p0 >> 3) & 0x3FF); // ??? What if not interlaced (/2)?
350 int32 xpos = p1 & 0xFFF;
351 xpos = (xpos & 0x800 ? xpos | 0xFFFFF000 : xpos);
352 uint32 iwidth = ((p1 >> 28) & 0x3FF);
353 uint32 dwidth = ((p1 >> 18) & 0x3FF); // Unsigned!
354 uint16 height = ((p0 >> 14) & 0x3FF);
355 uint32 link = ((p0 >> 24) & 0x7FFFF) << 3;
356 uint32 ptr = ((p0 >> 43) & 0x1FFFFF) << 3;
357 uint32 firstPix = (p1 >> 49) & 0x3F;
358 uint8 flags = (p1 >> 45) & 0x0F;
359 uint8 idx = (p1 >> 38) & 0x7F;
360 uint32 pitch = (p1 >> 15) & 0x07;
361 WriteLog("\n [%u (%u) x %u @ (%i, %u) (%u bpp), l: %08X, p: %08X fp: %02X, fl:%s%s%s%s, idx:%02X, pt:%02X]\n",
362 iwidth, dwidth, height, xpos, ypos, op_bitmap_bit_depth[bitdepth], link, ptr, firstPix, (flags&OPFLAG_REFLECT ? "REFLECT " : ""), (flags&OPFLAG_RMW ? "RMW " : ""), (flags&OPFLAG_TRANS ? "TRANS " : ""), (flags&OPFLAG_RELEASE ? "RELEASE" : ""), idx, pitch);
364 if ((p0 & 0x07) == OBJECT_TYPE_SCALE)
366 WriteLog(" (SCALED BITMAP)");
367 uint64 p1 = op_load_phrase(op_pointer), p2 = op_load_phrase(op_pointer+8);
368 WriteLog("\n%08X --> phrase %08X %08X ", op_pointer, (int)(p1>>32), (int)(p1&0xFFFFFFFF));
369 WriteLog("\n%08X --> phrase %08X %08X ", op_pointer+8, (int)(p2>>32), (int)(p2&0xFFFFFFFF));
370 uint8 bitdepth = (p1 >> 12) & 0x07;
371 int16 ypos = ((p0 >> 3) & 0x3FF); // ??? What if not interlaced (/2)?
372 int32 xpos = p1 & 0xFFF;
373 xpos = (xpos & 0x800 ? xpos | 0xFFFFF000 : xpos);
374 uint32 iwidth = ((p1 >> 28) & 0x3FF);
375 uint32 dwidth = ((p1 >> 18) & 0x3FF); // Unsigned!
376 uint16 height = ((p0 >> 14) & 0x3FF);
377 uint32 link = ((p0 >> 24) & 0x7FFFF) << 3;
378 uint32 ptr = ((p0 >> 43) & 0x1FFFFF) << 3;
379 uint32 firstPix = (p1 >> 49) & 0x3F;
380 uint8 flags = (p1 >> 45) & 0x0F;
381 uint8 idx = (p1 >> 38) & 0x7F;
382 uint32 pitch = (p1 >> 15) & 0x07;
383 WriteLog("\n [%u (%u) x %u @ (%i, %u) (%u bpp), l: %08X, p: %08X fp: %02X, fl:%s%s%s%s, idx:%02X, pt:%02X]\n",
384 iwidth, dwidth, height, xpos, ypos, op_bitmap_bit_depth[bitdepth], link, ptr, firstPix, (flags&OPFLAG_REFLECT ? "REFLECT " : ""), (flags&OPFLAG_RMW ? "RMW " : ""), (flags&OPFLAG_TRANS ? "TRANS " : ""), (flags&OPFLAG_RELEASE ? "RELEASE" : ""), idx, pitch);
385 uint32 hscale = p2 & 0xFF;
386 uint32 vscale = (p2 >> 8) & 0xFF;
387 uint32 remainder = (p2 >> 16) & 0xFF;
388 WriteLog(" [hsc: %02X, vsc: %02X, rem: %02X]\n", hscale, vscale, remainder);
390 if ((p0 & 0x07) == OBJECT_TYPE_GPU)
391 WriteLog(" (GPU)\n");
392 if ((p0 & 0x07) == OBJECT_TYPE_BRANCH)
394 WriteLog(" (BRANCH)\n");
395 uint8 * jaguar_mainRam = GetRamPtr();
396 WriteLog("[RAM] --> ");
397 for(int k=0; k<8; k++)
398 WriteLog("%02X ", jaguar_mainRam[op_pointer-8 + k]);
401 if ((p0 & 0x07) == OBJECT_TYPE_STOP)
402 WriteLog(" --> List end\n");
405 // WriteLog("%08X type %i\n", op_pointer, (uint8)p0 & 0x07);
406 switch ((uint8)p0 & 0x07)
408 case OBJECT_TYPE_BITMAP:
410 uint16 ypos = (p0 >> 3) & 0x3FF;
411 // This is only theory implied by Rayman...!
412 // It seems that if the YPOS is zero, then bump the YPOS value so that it coincides with
413 // the VDB value. With interlacing, this would be slightly more tricky.
414 // There's probably another bit somewhere that enables this mode--but so far, doesn't seem
415 // to affect any other game in a negative way (that I've seen).
416 // Either that, or it's an undocumented bug...
418 //No, the reason this was needed is that the OP code before was wrong. Any value
419 //less than VDB will get written to the top line of the display!
421 // ypos = TOMReadWord(0xF00046, OP) / 2; // Get the VDB value
422 uint32 height = (p0 & 0xFFC000) >> 14;
423 uint32 oldOPP = op_pointer - 8;
424 // *** BEGIN OP PROCESSOR TESTING ONLY ***
425 if (inhibit && op_start_log)
426 WriteLog("!!! ^^^ This object is INHIBITED! ^^^ !!!\n");
428 if (!inhibit) // For OP testing only!
429 // *** END OP PROCESSOR TESTING ONLY ***
430 if (scanline >= ypos && height > 0)
432 uint64 p1 = op_load_phrase(op_pointer);
434 //WriteLog("OP: Writing scanline %d with ypos == %d...\n", scanline, ypos);
435 //WriteLog("--> Writing %u BPP bitmap...\n", op_bitmap_bit_depth[(p1 >> 12) & 0x07]);
436 // OPProcessFixedBitmap(scanline, p0, p1, render);
437 OPProcessFixedBitmap(p0, p1, render);
441 //???Does this really happen??? Doesn't seem to work if you do this...!
442 //Probably not. Must be a bug in the documentation...!
443 // uint32 link = (p0 & 0x7FFFF000000) >> 21;
444 // SET16(objectp_ram, 0x20, link & 0xFFFF); // OLP
445 // SET16(objectp_ram, 0x22, link >> 16);
446 /* uint32 height = (p0 & 0xFFC000) >> 14;
449 // NOTE: Would subtract 2 if in interlaced mode...!
450 // uint64 height = ((p0 & 0xFFC000) - 0x4000) & 0xFFC000;
454 uint64 data = (p0 & 0xFFFFF80000000000) >> 40;
455 uint64 dwidth = (p1 & 0xFFC0000) >> 15;
458 p0 &= ~0xFFFFF80000FFC000; // Mask out old data...
459 p0 |= (uint64)height << 14;
461 OPStorePhrase(oldOPP, p0);
463 op_pointer = (p0 & 0x000007FFFF000000) >> 21;
466 case OBJECT_TYPE_SCALE:
468 uint16 ypos = (p0 >> 3) & 0x3FF;
469 uint32 height = (p0 & 0xFFC000) >> 14;
470 uint32 oldOPP = op_pointer - 8;
471 // *** BEGIN OP PROCESSOR TESTING ONLY ***
472 if (inhibit && op_start_log)
474 WriteLog("!!! ^^^ This object is INHIBITED! ^^^ !!! (scanline=%u, ypos=%u, height=%u)\n", scanline, ypos, height);
475 DumpScaledObject(p0, op_load_phrase(op_pointer), op_load_phrase(op_pointer+8));
478 if (!inhibit) // For OP testing only!
479 // *** END OP PROCESSOR TESTING ONLY ***
480 if (scanline >= ypos && height > 0)
482 uint64 p1 = op_load_phrase(op_pointer);
484 uint64 p2 = op_load_phrase(op_pointer);
486 //WriteLog("OP: %08X (%d) %08X%08X %08X%08X %08X%08X\n", oldOPP, scanline, (uint32)(p0>>32), (uint32)(p0&0xFFFFFFFF), (uint32)(p1>>32), (uint32)(p1&0xFFFFFFFF), (uint32)(p2>>32), (uint32)(p2&0xFFFFFFFF));
487 OPProcessScaledBitmap(p0, p1, p2, render);
491 uint8 remainder = p2 >> 16, vscale = p2 >> 8;
492 //Actually, we should skip this object if it has a vscale of zero.
493 //Or do we? Not sure... Atari Karts has a few lines that look like:
495 //000E8268 --> phrase 00010000 7000B00D
496 // [7 (0) x 1 @ (13, 0) (8 bpp), l: 000E82A0, p: 000E0FC0 fp: 00, fl:RELEASE, idx:00, pt:01]
497 // [hsc: 9A, vsc: 00, rem: 00]
498 // Could it be the vscale is overridden if the DWIDTH is zero? Hmm...
501 vscale = 0x20; // OP bug??? Nope, it isn't...! Or is it?
503 remainder -= 0x20; // 1.0f in [3.5] fixed point format
504 // if (remainder & 0x80) // I.e., it's negative
505 if ((remainder & 0x80) || remainder == 0) // I.e., it's <= 0
507 uint64 data = (p0 & 0xFFFFF80000000000) >> 40;
508 uint64 dwidth = (p1 & 0xFFC0000) >> 15;
510 // while (remainder & 0x80)
511 while ((remainder & 0x80) || remainder == 0)
519 p0 &= ~0xFFFFF80000FFC000; // Mask out old data...
520 p0 |= (uint64)height << 14;
522 OPStorePhrase(oldOPP, p0);
525 //WriteLog(" [%08X%08X -> ", (uint32)(p2>>32), (uint32)(p2&0xFFFFFFFF));
526 p2 &= ~0x0000000000FF0000;
527 p2 |= (uint64)remainder << 16;
528 //WriteLog("%08X%08X]\n", (uint32)(p2>>32), (uint32)(p2&0xFFFFFFFF));
529 OPStorePhrase(oldOPP+16, p2);
530 //remainder = (uint8)(p2 >> 16), vscale = (uint8)(p2 >> 8);
531 //WriteLog(" [after]: rem=%02X, vscale=%02X\n", remainder, vscale);
533 op_pointer = (p0 & 0x000007FFFF000000) >> 21;
536 case OBJECT_TYPE_GPU:
538 //WriteLog("OP: Asserting GPU IRQ #3...\n");
539 op_set_current_object(p0);
540 GPUSetIRQLine(3, ASSERT_LINE);
541 //Also, OP processing is suspended from this point until OBF (F00026) is written to...
544 //OPSuspendedByGPU = true;
545 //Dunno if the OP keeps processing from where it was interrupted, or if it just continues
546 //on the next scanline...
547 // --> It continues from where it was interrupted! !!! FIX !!!
550 case OBJECT_TYPE_BRANCH:
552 uint16 ypos = (p0 >> 3) & 0x7FF;
553 uint8 cc = (p0 >> 14) & 0x03;
554 uint32 link = (p0 >> 21) & 0x3FFFF8;
556 // if ((ypos!=507)&&(ypos!=25))
557 // WriteLog("\t%i%s%i link=0x%.8x\n",scanline,condition_to_str[cc],ypos>>1,link);
560 case CONDITION_EQUAL:
561 if (TOMReadWord(0xF00006, OP) == ypos || ypos == 0x7FF)
564 case CONDITION_LESS_THAN:
565 if (TOMReadWord(0xF00006, OP) < ypos)
568 case CONDITION_GREATER_THAN:
569 if (TOMReadWord(0xF00006, OP) > ypos)
572 case CONDITION_OP_FLAG_SET:
573 if (op_get_status_register() & 0x01)
576 case CONDITION_SECOND_HALF_LINE:
577 // This basically means branch if bit 10 of HC is set
578 WriteLog("OP: Unexpected CONDITION_SECOND_HALF_LINE in BRANCH object\nOP: shuting down\n");
583 WriteLog("OP: Unimplemented branch condition %i\n", cc);
587 case OBJECT_TYPE_STOP:
591 //WriteLog("OP: --> STOP\n");
592 // op_set_status_register(((p0>>3) & 0xFFFFFFFF));
593 //This seems more likely...
594 op_set_current_object(p0);
598 tom_set_pending_object_int();
599 if (tom_irq_enabled(IRQ_OPFLAG))// && jaguar_interrupt_handler_is_valid(64))
600 m68k_set_irq(7); // Cause an NMI to occur...
607 WriteLog("op: unknown object type %i\n", ((uint8)p0 & 0x07));
614 // Store fixed size bitmap in line buffer
616 void OPProcessFixedBitmap(uint64 p0, uint64 p1, bool render)
618 // Need to make sure that when writing that it stays within the line buffer...
619 // LBUF ($F01800 - $F01D9E) 360 x 32-bit RAM
620 uint8 depth = (p1 >> 12) & 0x07; // Color depth of image
621 int32 xpos = ((int16)((p1 << 4) & 0xFFFF)) >> 4;// Image xpos in LBUF
622 uint32 iwidth = (p1 >> 28) & 0x3FF; // Image width in *phrases*
623 uint32 data = (p0 >> 40) & 0xFFFFF8; // Pixel data address
624 //#ifdef OP_DEBUG_BMP
625 uint32 firstPix = (p1 >> 49) & 0x3F;
626 // "The LSB is significant only for scaled objects..." -JTRM
627 // "In 1 BPP mode, all five bits are significant. In 2 BPP mode, the top four are significant..."
630 // We can ignore the RELEASE (high order) bit for now--probably forever...!
631 // uint8 flags = (p1 >> 45) & 0x0F; // REFLECT, RMW, TRANS, RELEASE
632 //Optimize: break these out to their own BOOL values
633 uint8 flags = (p1 >> 45) & 0x07; // REFLECT (0), RMW (1), TRANS (2)
634 bool flagREFLECT = (flags & OPFLAG_REFLECT ? true : false),
635 flagRMW = (flags & OPFLAG_RMW ? true : false),
636 flagTRANS = (flags & OPFLAG_TRANS ? true : false);
637 // "For images with 1 to 4 bits/pixel the top 7 to 4 bits of the index
638 // provide the most significant bits of the palette address."
639 uint8 index = (p1 >> 37) & 0xFE; // CLUT index offset (upper pix, 1-4 bpp)
640 uint32 pitch = (p1 >> 15) & 0x07; // Phrase pitch
641 pitch <<= 3; // Optimization: Multiply pitch by 8
643 // int16 scanlineWidth = tom_getVideoModeWidth();
644 uint8 * tom_ram_8 = tom_get_ram_pointer();
645 uint8 * paletteRAM = &tom_ram_8[0x400];
646 // This is OK as long as it's used correctly: For 16-bit RAM to RAM direct copies--NOT
647 // for use when using endian-corrected data (i.e., any of the *_word_read functions!)
648 uint16 * paletteRAM16 = (uint16 *)paletteRAM;
650 // WriteLog("bitmap %ix? %ibpp at %i,? firstpix=? data=0x%.8x pitch %i hflipped=%s dwidth=? (linked to ?) RMW=%s Tranparent=%s\n",
651 // iwidth, op_bitmap_bit_depth[bitdepth], xpos, ptr, pitch, (flags&OPFLAG_REFLECT ? "yes" : "no"), (flags&OPFLAG_RMW ? "yes" : "no"), (flags&OPFLAG_TRANS ? "yes" : "no"));
653 // Is it OK to have a 0 for the data width??? (i.e., undocumented?)
654 // Seems to be... Seems that dwidth *can* be zero (i.e., reuse same line) as well.
655 // Pitch == 0 is OK too...
656 // if (!render || op_pointer == 0 || ptr == 0 || pitch == 0)
657 //I'm not convinced that we need to concern ourselves with data & op_pointer here either!
658 if (!render || iwidth == 0)
661 //#define OP_DEBUG_BMP
662 //#ifdef OP_DEBUG_BMP
663 // WriteLog("bitmap %ix%i %ibpp at %i,%i firstpix=%i data=0x%.8x pitch %i hflipped=%s dwidth=%i (linked to 0x%.8x) Transluency=%s\n",
664 // iwidth, height, op_bitmap_bit_depth[bitdepth], xpos, ypos, firstPix, ptr, pitch, (flags&OPFLAG_REFLECT ? "yes" : "no"), dwidth, op_pointer, (flags&OPFLAG_RMW ? "yes" : "no"));
667 // int32 leftMargin = xpos, rightMargin = (xpos + (phraseWidthToPixels[depth] * iwidth)) - 1;
668 int32 startPos = xpos, endPos = xpos +
669 (!flagREFLECT ? (phraseWidthToPixels[depth] * iwidth) - 1
670 : -((phraseWidthToPixels[depth] * iwidth) + 1));
671 uint32 clippedWidth = 0, phraseClippedWidth = 0, dataClippedWidth = 0;//, phrasePixel = 0;
672 bool in24BPPMode = (((GET16(tom_ram_8, 0x0028) >> 1) & 0x03) == 1 ? true : false); // VMODE
673 // Not sure if this is Jaguar Two only location or what...
674 // From the docs, it is... If we want to limit here we should think of something else.
675 // int32 limit = GET16(tom_ram_8, 0x0008); // LIMIT
677 int32 lbufWidth = (!in24BPPMode ? limit - 1 : (limit / 2) - 1); // Zero based limit...
679 // If the image is completely to the left or right of the line buffer, then bail.
680 //If in REFLECT mode, then these values are swapped! !!! FIX !!! [DONE]
681 //There are four possibilities:
682 // 1. image sits on left edge and no REFLECT; starts out of bounds but ends in bounds.
683 // 2. image sits on left edge and REFLECT; starts in bounds but ends out of bounds.
684 // 3. image sits on right edge and REFLECT; starts out of bounds but ends in bounds.
685 // 4. image sits on right edge and no REFLECT; starts in bounds but ends out of bounds.
686 //Numbers 2 & 4 can be caught by checking the LBUF clip while in the inner loop,
687 // numbers 1 & 3 are of concern.
688 // This *indirectly* handles only cases 2 & 4! And is WRONG is REFLECT is set...!
689 // if (rightMargin < 0 || leftMargin > lbufWidth)
691 // It might be easier to swap these (if REFLECTed) and just use XPOS down below...
692 // That way, you could simply set XPOS to leftMargin if !REFLECT and to rightMargin otherwise.
693 // Still have to be careful with the DATA and IWIDTH values though...
695 // if ((!flagREFLECT && (rightMargin < 0 || leftMargin > lbufWidth))
696 // || (flagREFLECT && (leftMargin < 0 || rightMargin > lbufWidth)))
698 if ((!flagREFLECT && (endPos < 0 || startPos > lbufWidth))
699 || (flagREFLECT && (startPos < 0 || endPos > lbufWidth)))
702 // Otherwise, find the clip limits and clip the phrase as well...
703 // NOTE: I'm fudging here by letting the actual blit overstep the bounds of the
704 // line buffer, but it shouldn't matter since there are two unused line
705 // buffers below and nothing above and I'll at most write 8 bytes outside
706 // the line buffer... I could use a fractional clip begin/end value, but
707 // this makes the blit a *lot* more hairy. I might fix this in the future
708 // if it becomes necessary. (JLH)
709 // Probably wouldn't be *that* hairy. Just use a delta that tells the inner loop
710 // which pixel in the phrase is being written, and quit when either end of phrases
711 // is reached or line buffer extents are surpassed.
713 //This stuff is probably wrong as well... !!! FIX !!!
714 //The strange thing is that it seems to work, but that's no guarantee that it's bulletproof!
715 //Yup. Seems that JagMania doesn't work correctly with this...
716 //Dunno if this is the problem, but Atari Karts is showing *some* of the road now...
721 clippedWidth = 0 - leftMargin,
722 phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth],
723 leftMargin = 0 - (clippedWidth % phraseWidthToPixels[depth]);
726 if (rightMargin > lbufWidth)
727 clippedWidth = rightMargin - lbufWidth,
728 phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth];//,
729 // rightMargin = lbufWidth + (clippedWidth % phraseWidthToPixels[depth]);
730 // rightMargin = lbufWidth;
733 WriteLog("OP: We're about to encounter a divide by zero error!\n");
734 // NOTE: We're just using endPos to figure out how much, if any, to clip by.
735 // ALSO: There may be another case where we start out of bounds and end out of bounds...!
737 if (startPos < 0) // Case #1: Begin out, end in, L to R
738 clippedWidth = 0 - startPos,
739 dataClippedWidth = phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth],
740 startPos = 0 - (clippedWidth % phraseWidthToPixels[depth]);
742 if (endPos < 0) // Case #2: Begin in, end out, R to L
743 clippedWidth = 0 - endPos,
744 phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth];
746 if (endPos > lbufWidth) // Case #3: Begin in, end out, L to R
747 clippedWidth = endPos - lbufWidth,
748 phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth];
750 if (startPos > lbufWidth) // Case #4: Begin out, end in, R to L
751 clippedWidth = startPos - lbufWidth,
752 dataClippedWidth = phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth],
753 startPos = lbufWidth + (clippedWidth % phraseWidthToPixels[depth]);
755 // If the image is sitting on the line buffer left or right edge, we need to compensate
756 // by decreasing the image phrase width accordingly.
757 iwidth -= phraseClippedWidth;
759 // Also, if we're clipping the phrase we need to make sure we're in the correct part of
761 // data += phraseClippedWidth * (pitch << 3);
762 data += dataClippedWidth * pitch;
764 // NOTE: When the bitmap is in REFLECT mode, the XPOS marks the *right* side of the
765 // bitmap! This makes clipping & etc. MUCH, much easier...!
766 // uint32 lbufAddress = 0x1800 + (!in24BPPMode ? leftMargin * 2 : leftMargin * 4);
767 //Why does this work right when multiplying startPos by 2 (instead of 4) for 24 BPP mode?
768 //Is this a bug in the OP?
769 uint32 lbufAddress = 0x1800 + (!in24BPPMode ? startPos * 2 : startPos * 2);
770 uint8 * currentLineBuffer = &tom_ram_8[lbufAddress];
774 // Hmm. We check above for 24 BPP mode, but don't do anything about it below...
775 // If we *were* in 24 BPP mode, how would you convert CRY to RGB24? Seems to me
776 // that if you're in CRY mode then you wouldn't be able to use 24 BPP bitmaps
778 // This seems to be the case (at least according to the Midsummer docs)...!
780 if (depth == 0) // 1 BPP
782 // The LSB of flags is OPFLAG_REFLECT, so sign extend it and or 2 into it.
783 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
785 // Fetch 1st phrase...
786 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
787 //Note that firstPix should only be honored *if* we start with the 1st phrase of the bitmap
788 //i.e., we didn't clip on the margin... !!! FIX !!!
789 pixels <<= firstPix; // Skip first N pixels (N=firstPix)...
790 int i = firstPix; // Start counter at right spot...
796 uint8 bit = pixels >> 63;
797 if (flagTRANS && bit == 0)
802 //Optimize: Set palleteRAM16 to beginning of palette RAM + index*2 and use only [bit] as index...
803 //Won't optimize RMW case though...
804 // This is the *only* correct use of endian-dependent code
805 // (i.e., mem-to-mem direct copying)!
806 *(uint16 *)currentLineBuffer = paletteRAM16[index | bit];
809 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bit) << 1]),
810 *(currentLineBuffer + 1) =
811 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bit) << 1) + 1]);
814 currentLineBuffer += lbufDelta;
818 // Fetch next phrase...
820 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
823 else if (depth == 1) // 2 BPP
826 WriteLog("OP: Fixed bitmap @ 2 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
827 index &= 0xFC; // Top six bits form CLUT index
828 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
829 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
834 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
837 for(int i=0; i<32; i++)
839 uint8 bits = pixels >> 62;
840 // Seems to me that both of these are in the same endian, so we could cast it as
841 // uint16 * and do straight across copies (what about 24 bpp? Treat it differently...)
842 // This only works for the palettized modes (1 - 8 BPP), since we actually have to
843 // copy data from memory in 16 BPP mode (or does it? Isn't this the same as the CLUT case?)
844 // No, it isn't because we read the memory in an endian safe way--this *won't* work...
845 if (flagTRANS && bits == 0)
850 *(uint16 *)currentLineBuffer = paletteRAM16[index | bits];
853 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bits) << 1]),
854 *(currentLineBuffer + 1) =
855 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bits) << 1) + 1]);
858 currentLineBuffer += lbufDelta;
863 else if (depth == 2) // 4 BPP
866 WriteLog("OP: Fixed bitmap @ 4 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
867 index &= 0xF0; // Top four bits form CLUT index
868 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
869 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
874 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
877 for(int i=0; i<16; i++)
879 uint8 bits = pixels >> 60;
880 // Seems to me that both of these are in the same endian, so we could cast it as
881 // uint16 * and do straight across copies (what about 24 bpp? Treat it differently...)
882 // This only works for the palettized modes (1 - 8 BPP), since we actually have to
883 // copy data from memory in 16 BPP mode (or does it? Isn't this the same as the CLUT case?)
884 // No, it isn't because we read the memory in an endian safe way--this *won't* work...
885 if (flagTRANS && bits == 0)
890 *(uint16 *)currentLineBuffer = paletteRAM16[index | bits];
893 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bits) << 1]),
894 *(currentLineBuffer + 1) =
895 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bits) << 1) + 1]);
898 currentLineBuffer += lbufDelta;
903 else if (depth == 3) // 8 BPP
905 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
906 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
908 // Fetch 1st phrase...
909 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
910 //Note that firstPix should only be honored *if* we start with the 1st phrase of the bitmap
911 //i.e., we didn't clip on the margin... !!! FIX !!!
912 firstPix &= 0x30; // Only top two bits are valid for 8 BPP
913 pixels <<= firstPix; // Skip first N pixels (N=firstPix)...
914 int i = firstPix >> 3; // Start counter at right spot...
920 uint8 bits = pixels >> 56;
921 // Seems to me that both of these are in the same endian, so we could cast it as
922 // uint16 * and do straight across copies (what about 24 bpp? Treat it differently...)
923 // This only works for the palettized modes (1 - 8 BPP), since we actually have to
924 // copy data from memory in 16 BPP mode (or does it? Isn't this the same as the CLUT case?)
925 // No, it isn't because we read the memory in an endian safe way--this *won't* work...
926 if (flagTRANS && bits == 0)
931 *(uint16 *)currentLineBuffer = paletteRAM16[bits];
934 BLEND_CR(*currentLineBuffer, paletteRAM[bits << 1]),
935 *(currentLineBuffer + 1) =
936 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[(bits << 1) + 1]);
939 currentLineBuffer += lbufDelta;
943 // Fetch next phrase...
945 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
948 else if (depth == 4) // 16 BPP
951 WriteLog("OP: Fixed bitmap @ 16 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
952 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
953 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
958 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
961 for(int i=0; i<4; i++)
963 uint8 bitsHi = pixels >> 56, bitsLo = pixels >> 48;
964 // Seems to me that both of these are in the same endian, so we could cast it as
965 // uint16 * and do straight across copies (what about 24 bpp? Treat it differently...)
966 // This only works for the palettized modes (1 - 8 BPP), since we actually have to
967 // copy data from memory in 16 BPP mode (or does it? Isn't this the same as the CLUT case?)
968 // No, it isn't because we read the memory in an endian safe way--it *won't* work...
969 if (flagTRANS && (bitsLo | bitsHi) == 0)
974 *currentLineBuffer = bitsHi,
975 *(currentLineBuffer + 1) = bitsLo;
978 BLEND_CR(*currentLineBuffer, bitsHi),
979 *(currentLineBuffer + 1) =
980 BLEND_Y(*(currentLineBuffer + 1), bitsLo);
983 currentLineBuffer += lbufDelta;
988 else if (depth == 5) // 24 BPP
990 //Looks like Iron Soldier is the only game that uses 24BPP mode...
991 //There *might* be others...
992 //WriteLog("OP: Writing 24 BPP bitmap!\n");
994 WriteLog("OP: Fixed bitmap @ 24 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
995 // Not sure, but I think RMW only works with 16 BPP and below, and only in CRY mode...
996 // The LSB of flags is OPFLAG_REFLECT, so sign extend it and OR 4 into it.
997 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 4) | 0x04;
1002 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1005 for(int i=0; i<2; i++)
1007 // We don't use a 32-bit var here because of endian issues...!
1008 uint8 bits3 = pixels >> 56, bits2 = pixels >> 48,
1009 bits1 = pixels >> 40, bits0 = pixels >> 32;
1011 if (flagTRANS && (bits3 | bits2 | bits1 | bits0) == 0)
1014 *currentLineBuffer = bits3,
1015 *(currentLineBuffer + 1) = bits2,
1016 *(currentLineBuffer + 2) = bits1,
1017 *(currentLineBuffer + 3) = bits0;
1019 currentLineBuffer += lbufDelta;
1027 // Store scaled bitmap in line buffer
1029 void OPProcessScaledBitmap(uint64 p0, uint64 p1, uint64 p2, bool render)
1031 // Need to make sure that when writing that it stays within the line buffer...
1032 // LBUF ($F01800 - $F01D9E) 360 x 32-bit RAM
1033 uint8 depth = (p1 >> 12) & 0x07; // Color depth of image
1034 int32 xpos = ((int16)((p1 << 4) & 0xFFFF)) >> 4;// Image xpos in LBUF
1035 uint32 iwidth = (p1 >> 28) & 0x3FF; // Image width in *phrases*
1036 uint32 data = (p0 >> 40) & 0xFFFFF8; // Pixel data address
1037 //#ifdef OP_DEBUG_BMP
1038 // Prolly should use this... Though not sure exactly how.
1039 //Use the upper bits as an offset into the phrase depending on the BPP. That's how!
1040 uint32 firstPix = (p1 >> 49) & 0x3F;
1041 //This is WEIRD! I'm sure I saw Atari Karts request 8 BPP FIRSTPIX! What happened???
1043 WriteLog("OP: FIRSTPIX != 0! (Scaled BM)\n");
1045 // We can ignore the RELEASE (high order) bit for now--probably forever...!
1046 // uint8 flags = (p1 >> 45) & 0x0F; // REFLECT, RMW, TRANS, RELEASE
1047 //Optimize: break these out to their own BOOL values
1048 uint8 flags = (p1 >> 45) & 0x07; // REFLECT (0), RMW (1), TRANS (2)
1049 bool flagREFLECT = (flags & OPFLAG_REFLECT ? true : false),
1050 flagRMW = (flags & OPFLAG_RMW ? true : false),
1051 flagTRANS = (flags & OPFLAG_TRANS ? true : false);
1052 uint8 index = (p1 >> 37) & 0xFE; // CLUT index offset (upper pix, 1-4 bpp)
1053 uint32 pitch = (p1 >> 15) & 0x07; // Phrase pitch
1055 uint8 * tom_ram_8 = tom_get_ram_pointer();
1056 uint8 * paletteRAM = &tom_ram_8[0x400];
1057 // This is OK as long as it's used correctly: For 16-bit RAM to RAM direct copies--NOT
1058 // for use when using endian-corrected data (i.e., any of the *ReadWord functions!)
1059 uint16 * paletteRAM16 = (uint16 *)paletteRAM;
1061 uint8 hscale = p2 & 0xFF;
1062 // uint8 horizontalRemainder = hscale; // Not sure if it starts full, but seems reasonable [It's not!]
1063 uint8 horizontalRemainder = 0; // Let's try zero! Seems to work! Yay!
1064 int32 scaledWidthInPixels = (iwidth * phraseWidthToPixels[depth] * hscale) >> 5;
1065 uint32 scaledPhrasePixels = (phraseWidthToPixels[depth] * hscale) >> 5;
1067 // WriteLog("bitmap %ix? %ibpp at %i,? firstpix=? data=0x%.8x pitch %i hflipped=%s dwidth=? (linked to ?) RMW=%s Tranparent=%s\n",
1068 // iwidth, op_bitmap_bit_depth[bitdepth], xpos, ptr, pitch, (flags&OPFLAG_REFLECT ? "yes" : "no"), (flags&OPFLAG_RMW ? "yes" : "no"), (flags&OPFLAG_TRANS ? "yes" : "no"));
1070 // Looks like an hscale of zero means don't draw!
1071 if (!render || iwidth == 0 || hscale == 0)
1074 //#define OP_DEBUG_BMP
1075 //#ifdef OP_DEBUG_BMP
1076 // WriteLog("bitmap %ix%i %ibpp at %i,%i firstpix=%i data=0x%.8x pitch %i hflipped=%s dwidth=%i (linked to 0x%.8x) Transluency=%s\n",
1077 // iwidth, height, op_bitmap_bit_depth[bitdepth], xpos, ypos, firstPix, ptr, pitch, (flags&OPFLAG_REFLECT ? "yes" : "no"), dwidth, op_pointer, (flags&OPFLAG_RMW ? "yes" : "no"));
1080 int32 startPos = xpos, endPos = xpos +
1081 (!flagREFLECT ? scaledWidthInPixels - 1 : -(scaledWidthInPixels + 1));
1082 uint32 clippedWidth = 0, phraseClippedWidth = 0, dataClippedWidth = 0;
1083 bool in24BPPMode = (((GET16(tom_ram_8, 0x0028) >> 1) & 0x03) == 1 ? true : false); // VMODE
1084 // Not sure if this is Jaguar Two only location or what...
1085 // From the docs, it is... If we want to limit here we should think of something else.
1086 // int32 limit = GET16(tom_ram_8, 0x0008); // LIMIT
1088 int32 lbufWidth = (!in24BPPMode ? limit - 1 : (limit / 2) - 1); // Zero based limit...
1090 // If the image is completely to the left or right of the line buffer, then bail.
1091 //If in REFLECT mode, then these values are swapped! !!! FIX !!! [DONE]
1092 //There are four possibilities:
1093 // 1. image sits on left edge and no REFLECT; starts out of bounds but ends in bounds.
1094 // 2. image sits on left edge and REFLECT; starts in bounds but ends out of bounds.
1095 // 3. image sits on right edge and REFLECT; starts out of bounds but ends in bounds.
1096 // 4. image sits on right edge and no REFLECT; starts in bounds but ends out of bounds.
1097 //Numbers 2 & 4 can be caught by checking the LBUF clip while in the inner loop,
1098 // numbers 1 & 3 are of concern.
1099 // This *indirectly* handles only cases 2 & 4! And is WRONG is REFLECT is set...!
1100 // if (rightMargin < 0 || leftMargin > lbufWidth)
1102 // It might be easier to swap these (if REFLECTed) and just use XPOS down below...
1103 // That way, you could simply set XPOS to leftMargin if !REFLECT and to rightMargin otherwise.
1104 // Still have to be careful with the DATA and IWIDTH values though...
1106 if ((!flagREFLECT && (endPos < 0 || startPos > lbufWidth))
1107 || (flagREFLECT && (startPos < 0 || endPos > lbufWidth)))
1110 // Otherwise, find the clip limits and clip the phrase as well...
1111 // NOTE: I'm fudging here by letting the actual blit overstep the bounds of the
1112 // line buffer, but it shouldn't matter since there are two unused line
1113 // buffers below and nothing above and I'll at most write 40 bytes outside
1114 // the line buffer... I could use a fractional clip begin/end value, but
1115 // this makes the blit a *lot* more hairy. I might fix this in the future
1116 // if it becomes necessary. (JLH)
1117 // Probably wouldn't be *that* hairy. Just use a delta that tells the inner loop
1118 // which pixel in the phrase is being written, and quit when either end of phrases
1119 // is reached or line buffer extents are surpassed.
1121 //This stuff is probably wrong as well... !!! FIX !!!
1122 //The strange thing is that it seems to work, but that's no guarantee that it's bulletproof!
1123 //Yup. Seems that JagMania doesn't work correctly with this...
1124 //Dunno if this is the problem, but Atari Karts is showing *some* of the road now...
1125 //Actually, it is! Or, it was. It doesn't seem to be clipping here, so the problem lies
1126 //elsewhere! Hmm. Putting the scaling code into the 1/2/8 BPP cases seems to draw the ground
1127 // a bit more accurately... Strange!
1128 //It's probably a case of the REFLECT flag being set and the background being written
1129 //from the right side of the screen...
1130 //But no, it isn't... At least if the diagnostics are telling the truth!
1132 // NOTE: We're just using endPos to figure out how much, if any, to clip by.
1133 // ALSO: There may be another case where we start out of bounds and end out of bounds...!
1136 //There's a problem here with scaledPhrasePixels in that it can be forced to zero when
1137 //the scaling factor is small. So fix it already! !!! FIX !!!
1138 /*if (scaledPhrasePixels == 0)
1140 WriteLog("OP: [Scaled] We're about to encounter a divide by zero error!\n");
1141 DumpScaledObject(p0, p1, p2);
1143 //NOTE: I'm almost 100% sure that this is wrong... And it is! :-p
1144 if (startPos < 0) // Case #1: Begin out, end in, L to R
1145 /* clippedWidth = 0 - startPos,
1146 dataClippedWidth = phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth],
1147 startPos = 0 - (clippedWidth % phraseWidthToPixels[depth]);*/
1148 clippedWidth = 0 - startPos,
1149 dataClippedWidth = phraseClippedWidth = clippedWidth / scaledPhrasePixels,
1150 startPos = 0 - (clippedWidth % scaledPhrasePixels);
1152 if (endPos < 0) // Case #2: Begin in, end out, R to L
1153 /* clippedWidth = 0 - endPos,
1154 phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth];*/
1155 clippedWidth = 0 - endPos,
1156 phraseClippedWidth = clippedWidth / scaledPhrasePixels;
1158 if (endPos > lbufWidth) // Case #3: Begin in, end out, L to R
1159 /* clippedWidth = endPos - lbufWidth,
1160 phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth];*/
1161 clippedWidth = endPos - lbufWidth,
1162 phraseClippedWidth = clippedWidth / scaledPhrasePixels;
1164 if (startPos > lbufWidth) // Case #4: Begin out, end in, R to L
1165 /* clippedWidth = startPos - lbufWidth,
1166 dataClippedWidth = phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth],
1167 startPos = lbufWidth + (clippedWidth % phraseWidthToPixels[depth]);*/
1168 clippedWidth = startPos - lbufWidth,
1169 dataClippedWidth = phraseClippedWidth = clippedWidth / scaledPhrasePixels,
1170 startPos = lbufWidth + (clippedWidth % scaledPhrasePixels);
1172 extern int op_start_log;
1173 if (op_start_log && clippedWidth != 0)
1174 WriteLog("OP: Clipped line. SP=%i, EP=%i, clip=%u, iwidth=%u, hscale=%02X\n", startPos, endPos, clippedWidth, iwidth, hscale);
1175 if (op_start_log && startPos == 13)
1177 WriteLog("OP: Scaled line. SP=%i, EP=%i, clip=%u, iwidth=%u, hscale=%02X, depth=%u, firstPix=%u\n", startPos, endPos, clippedWidth, iwidth, hscale, depth, firstPix);
1178 DumpScaledObject(p0, p1, p2);
1180 // If the image is sitting on the line buffer left or right edge, we need to compensate
1181 // by decreasing the image phrase width accordingly.
1182 iwidth -= phraseClippedWidth;
1184 // Also, if we're clipping the phrase we need to make sure we're in the correct part of
1186 // data += phraseClippedWidth * (pitch << 3);
1187 data += dataClippedWidth * (pitch << 3);
1189 // NOTE: When the bitmap is in REFLECT mode, the XPOS marks the *right* side of the
1190 // bitmap! This makes clipping & etc. MUCH, much easier...!
1191 // uint32 lbufAddress = 0x1800 + (!in24BPPMode ? leftMargin * 2 : leftMargin * 4);
1192 // uint32 lbufAddress = 0x1800 + (!in24BPPMode ? startPos * 2 : startPos * 4);
1193 uint32 lbufAddress = 0x1800 + (!in24BPPMode ? startPos * 2 : startPos * 2);
1194 uint8 * currentLineBuffer = &tom_ram_8[lbufAddress];
1198 // Hmm. We check above for 24 BPP mode, but don't do anything about it below...
1199 // If we *were* in 24 BPP mode, how would you convert CRY to RGB24? Seems to me
1200 // that if you're in CRY mode then you wouldn't be able to use 24 BPP bitmaps
1202 // This seems to be the case (at least according to the Midsummer docs)...!
1204 if (depth == 0) // 1 BPP
1207 WriteLog("OP: Scaled bitmap @ 1 BPP requesting FIRSTPIX!\n");
1208 // The LSB of flags is OPFLAG_REFLECT, so sign extend it and or 2 into it.
1209 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1212 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1214 while ((int32)iwidth > 0)
1216 uint8 bits = pixels >> 63;
1218 if (flagTRANS && bits == 0)
1223 // This is the *only* correct use of endian-dependent code
1224 // (i.e., mem-to-mem direct copying)!
1225 *(uint16 *)currentLineBuffer = paletteRAM16[index | bits];
1227 *currentLineBuffer =
1228 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bits) << 1]),
1229 *(currentLineBuffer + 1) =
1230 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bits) << 1) + 1]);
1233 currentLineBuffer += lbufDelta;
1235 horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1236 while (horizontalRemainder & 0x80)
1238 horizontalRemainder += hscale;
1245 int phrasesToSkip = pixCount / 64, pixelShift = pixCount % 64;
1247 data += (pitch << 3) * phrasesToSkip;
1248 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1249 pixels <<= 1 * pixelShift;
1250 iwidth -= phrasesToSkip;
1251 pixCount = pixelShift;
1255 else if (depth == 1) // 2 BPP
1258 WriteLog("OP: Scaled bitmap @ 2 BPP requesting FIRSTPIX!\n");
1259 index &= 0xFC; // Top six bits form CLUT index
1260 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
1261 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1264 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1266 while ((int32)iwidth > 0)
1268 uint8 bits = pixels >> 62;
1270 if (flagTRANS && bits == 0)
1275 // This is the *only* correct use of endian-dependent code
1276 // (i.e., mem-to-mem direct copying)!
1277 *(uint16 *)currentLineBuffer = paletteRAM16[index | bits];
1279 *currentLineBuffer =
1280 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bits) << 1]),
1281 *(currentLineBuffer + 1) =
1282 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bits) << 1) + 1]);
1285 currentLineBuffer += lbufDelta;
1287 horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1288 while (horizontalRemainder & 0x80)
1290 horizontalRemainder += hscale;
1297 int phrasesToSkip = pixCount / 32, pixelShift = pixCount % 32;
1299 data += (pitch << 3) * phrasesToSkip;
1300 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1301 pixels <<= 2 * pixelShift;
1302 iwidth -= phrasesToSkip;
1303 pixCount = pixelShift;
1307 else if (depth == 2) // 4 BPP
1310 WriteLog("OP: Scaled bitmap @ 4 BPP requesting FIRSTPIX!\n");
1311 index &= 0xF0; // Top four bits form CLUT index
1312 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
1313 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1316 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1318 while ((int32)iwidth > 0)
1320 uint8 bits = pixels >> 60;
1322 if (flagTRANS && bits == 0)
1327 // This is the *only* correct use of endian-dependent code
1328 // (i.e., mem-to-mem direct copying)!
1329 *(uint16 *)currentLineBuffer = paletteRAM16[index | bits];
1331 *currentLineBuffer =
1332 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bits) << 1]),
1333 *(currentLineBuffer + 1) =
1334 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bits) << 1) + 1]);
1337 currentLineBuffer += lbufDelta;
1339 horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1340 while (horizontalRemainder & 0x80)
1342 horizontalRemainder += hscale;
1349 int phrasesToSkip = pixCount / 16, pixelShift = pixCount % 16;
1351 data += (pitch << 3) * phrasesToSkip;
1352 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1353 pixels <<= 4 * pixelShift;
1354 iwidth -= phrasesToSkip;
1355 pixCount = pixelShift;
1359 else if (depth == 3) // 8 BPP
1362 WriteLog("OP: Scaled bitmap @ 8 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
1363 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
1364 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1367 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1369 while ((int32)iwidth > 0)
1371 uint8 bits = pixels >> 56;
1373 if (flagTRANS && bits == 0)
1378 // This is the *only* correct use of endian-dependent code
1379 // (i.e., mem-to-mem direct copying)!
1380 *(uint16 *)currentLineBuffer = paletteRAM16[bits];
1382 *currentLineBuffer =
1383 BLEND_CR(*currentLineBuffer, paletteRAM[bits << 1]),
1384 *(currentLineBuffer + 1) =
1385 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[(bits << 1) + 1]);
1388 currentLineBuffer += lbufDelta;
1390 horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1391 while (horizontalRemainder & 0x80)
1393 horizontalRemainder += hscale;
1400 int phrasesToSkip = pixCount / 8, pixelShift = pixCount % 8;
1402 data += (pitch << 3) * phrasesToSkip;
1403 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1404 pixels <<= 8 * pixelShift;
1405 iwidth -= phrasesToSkip;
1406 pixCount = pixelShift;
1410 else if (depth == 4) // 16 BPP
1413 WriteLog("OP: Scaled bitmap @ 16 BPP requesting FIRSTPIX!\n");
1414 // The LSB is OPFLAG_REFLECT, so sign extend it and OR 2 into it.
1415 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1418 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1420 while ((int32)iwidth > 0)
1422 uint8 bitsHi = pixels >> 56, bitsLo = pixels >> 48;
1424 if (flagTRANS && (bitsLo | bitsHi) == 0)
1429 *currentLineBuffer = bitsHi,
1430 *(currentLineBuffer + 1) = bitsLo;
1432 *currentLineBuffer =
1433 BLEND_CR(*currentLineBuffer, bitsHi),
1434 *(currentLineBuffer + 1) =
1435 BLEND_Y(*(currentLineBuffer + 1), bitsLo);
1438 currentLineBuffer += lbufDelta;
1440 horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1441 while (horizontalRemainder & 0x80)
1443 horizontalRemainder += hscale;
1450 int phrasesToSkip = pixCount / 4, pixelShift = pixCount % 4;
1452 data += (pitch << 3) * phrasesToSkip;
1453 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1454 pixels <<= 16 * pixelShift;
1456 iwidth -= phrasesToSkip;
1458 pixCount = pixelShift;
1462 else if (depth == 5) // 24 BPP
1464 //I'm not sure that you can scale a 24 BPP bitmap properly--the JTRM seem to indicate as much.
1465 WriteLog("OP: Writing 24 BPP scaled bitmap!\n");
1467 WriteLog("OP: Scaled bitmap @ 24 BPP requesting FIRSTPIX!\n");
1468 // Not sure, but I think RMW only works with 16 BPP and below, and only in CRY mode...
1469 // The LSB is OPFLAG_REFLECT, so sign extend it and or 4 into it.
1470 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 4) | 0x04;
1475 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1476 data += pitch << 3; // Multiply pitch * 8 (optimize: precompute this value)
1478 for(int i=0; i<2; i++)
1480 uint8 bits3 = pixels >> 56, bits2 = pixels >> 48,
1481 bits1 = pixels >> 40, bits0 = pixels >> 32;
1483 if (flagTRANS && (bits3 | bits2 | bits1 | bits0) == 0)
1486 *currentLineBuffer = bits3,
1487 *(currentLineBuffer + 1) = bits2,
1488 *(currentLineBuffer + 2) = bits1,
1489 *(currentLineBuffer + 3) = bits0;
1491 currentLineBuffer += lbufDelta;
1496 /*if (depth == 3 && startPos == 13)
1499 WriteLog("OP: Writing in the margins...\n");
1500 for(int i=0; i<100*2; i+=2)
1501 // for(int i=0; i<14*2; i+=2)
1502 tom_ram_8[0x1800 + i] = 0xFF,
1503 tom_ram_8[0x1800 + i + 1] = 0xFF;
1505 // uint32 lbufAddress = 0x1800 + (!in24BPPMode ? startPos * 2 : startPos * 4);
1506 // uint8 * currentLineBuffer = &tom_ram_8[lbufAddress];