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 //WAS: int16 ypos = ((p0 >> 3) & 0x3FF); // ??? What if not interlaced (/2)?
262 int16 ypos = ((p0 >> 3) & 0x7FF); // ??? What if not interlaced (/2)?
263 int32 xpos = p1 & 0xFFF;
264 xpos = (xpos & 0x800 ? xpos | 0xFFFFF000 : xpos);
265 uint32 iwidth = ((p1 >> 28) & 0x3FF);
266 uint32 dwidth = ((p1 >> 18) & 0x3FF); // Unsigned!
267 uint16 height = ((p0 >> 14) & 0x3FF);
268 uint32 link = ((p0 >> 24) & 0x7FFFF) << 3;
269 uint32 ptr = ((p0 >> 43) & 0x1FFFFF) << 3;
270 uint32 firstPix = (p1 >> 49) & 0x3F;
271 uint8 flags = (p1 >> 45) & 0x0F;
272 uint8 idx = (p1 >> 38) & 0x7F;
273 uint32 pitch = (p1 >> 15) & 0x07;
274 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",
275 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);
276 uint32 hscale = p2 & 0xFF;
277 uint32 vscale = (p2 >> 8) & 0xFF;
278 uint32 remainder = (p2 >> 16) & 0xFF;
279 WriteLog(" [hsc: %02X, vsc: %02X, rem: %02X]\n", hscale, vscale, remainder);
282 void DumpFixedObject(uint64 p0, uint64 p1)
284 WriteLog(" (BITMAP)");
285 WriteLog(" %08X --> phrase %08X %08X\n", op_pointer, (uint32)(p1>>32), (uint32)(p1&0xFFFFFFFF));
286 uint8 bitdepth = (p1 >> 12) & 0x07;
287 //WAS: int16 ypos = ((p0 >> 3) & 0x3FF); // ??? What if not interlaced (/2)?
288 int16 ypos = ((p0 >> 3) & 0x7FF); // ??? What if not interlaced (/2)?
289 int32 xpos = p1 & 0xFFF;
290 xpos = (xpos & 0x800 ? xpos | 0xFFFFF000 : xpos);
291 uint32 iwidth = ((p1 >> 28) & 0x3FF);
292 uint32 dwidth = ((p1 >> 18) & 0x3FF); // Unsigned!
293 uint16 height = ((p0 >> 14) & 0x3FF);
294 uint32 link = ((p0 >> 24) & 0x7FFFF) << 3;
295 uint32 ptr = ((p0 >> 43) & 0x1FFFFF) << 3;
296 uint32 firstPix = (p1 >> 49) & 0x3F;
297 uint8 flags = (p1 >> 45) & 0x0F;
298 uint8 idx = (p1 >> 38) & 0x7F;
299 uint32 pitch = (p1 >> 15) & 0x07;
300 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",
301 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);
305 // Object Processor main routine
307 //Need to fix this so that when an GPU object IRQ happens, we can pick up OP processing
308 //where we left off. !!! FIX !!!
309 void OPProcessList(int scanline, bool render)
311 extern int op_start_log;
312 // char * condition_to_str[8] =
313 // { "==", "<", ">", "(opflag set)", "(second half line)", "?", "?", "?" };
315 op_pointer = op_get_list_pointer();
317 // objectp_stop_reading_list = false;
319 //WriteLog("OP: Processing line #%u (OLP=%08X)...\n", scanline, op_pointer);
322 // *** BEGIN OP PROCESSOR TESTING ONLY ***
323 extern bool interactiveMode;
325 extern int objectPtr;
327 int bitmapCounter = 0;
328 // *** END OP PROCESSOR TESTING ONLY ***
330 uint32 opCyclesToRun = 10000; // This is a pulled-out-of-the-air value (will need to be fixed, obviously!)
332 // if (op_pointer) WriteLog(" new op list at 0x%.8x scanline %i\n",op_pointer,scanline);
335 // *** BEGIN OP PROCESSOR TESTING ONLY ***
336 if (interactiveMode && bitmapCounter == objectPtr)
340 // *** END OP PROCESSOR TESTING ONLY ***
341 // if (objectp_stop_reading_list)
344 uint64 p0 = op_load_phrase(op_pointer);
345 //WriteLog("\t%08X type %i\n", op_pointer, (uint8)p0 & 0x07);
347 if (scanline == tom_get_vdb() && op_start_log)
348 //if (scanline == 215 && op_start_log)
350 WriteLog("%08X --> phrase %08X %08X", op_pointer - 8, (int)(p0>>32), (int)(p0&0xFFFFFFFF));
351 if ((p0 & 0x07) == OBJECT_TYPE_BITMAP)
353 WriteLog(" (BITMAP) ");
354 uint64 p1 = op_load_phrase(op_pointer);
355 WriteLog("\n%08X --> phrase %08X %08X ", op_pointer, (int)(p1>>32), (int)(p1&0xFFFFFFFF));
356 uint8 bitdepth = (p1 >> 12) & 0x07;
357 //WAS: int16 ypos = ((p0 >> 3) & 0x3FF); // ??? What if not interlaced (/2)?
358 int16 ypos = ((p0 >> 3) & 0x7FF); // ??? What if not interlaced (/2)?
359 int32 xpos = p1 & 0xFFF;
360 xpos = (xpos & 0x800 ? xpos | 0xFFFFF000 : xpos);
361 uint32 iwidth = ((p1 >> 28) & 0x3FF);
362 uint32 dwidth = ((p1 >> 18) & 0x3FF); // Unsigned!
363 uint16 height = ((p0 >> 14) & 0x3FF);
364 uint32 link = ((p0 >> 24) & 0x7FFFF) << 3;
365 uint32 ptr = ((p0 >> 43) & 0x1FFFFF) << 3;
366 uint32 firstPix = (p1 >> 49) & 0x3F;
367 uint8 flags = (p1 >> 45) & 0x0F;
368 uint8 idx = (p1 >> 38) & 0x7F;
369 uint32 pitch = (p1 >> 15) & 0x07;
370 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",
371 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);
373 if ((p0 & 0x07) == OBJECT_TYPE_SCALE)
375 WriteLog(" (SCALED BITMAP)");
376 uint64 p1 = op_load_phrase(op_pointer), p2 = op_load_phrase(op_pointer+8);
377 WriteLog("\n%08X --> phrase %08X %08X ", op_pointer, (int)(p1>>32), (int)(p1&0xFFFFFFFF));
378 WriteLog("\n%08X --> phrase %08X %08X ", op_pointer+8, (int)(p2>>32), (int)(p2&0xFFFFFFFF));
379 uint8 bitdepth = (p1 >> 12) & 0x07;
380 //WAS: int16 ypos = ((p0 >> 3) & 0x3FF); // ??? What if not interlaced (/2)?
381 int16 ypos = ((p0 >> 3) & 0x7FF); // ??? What if not interlaced (/2)?
382 int32 xpos = p1 & 0xFFF;
383 xpos = (xpos & 0x800 ? xpos | 0xFFFFF000 : xpos);
384 uint32 iwidth = ((p1 >> 28) & 0x3FF);
385 uint32 dwidth = ((p1 >> 18) & 0x3FF); // Unsigned!
386 uint16 height = ((p0 >> 14) & 0x3FF);
387 uint32 link = ((p0 >> 24) & 0x7FFFF) << 3;
388 uint32 ptr = ((p0 >> 43) & 0x1FFFFF) << 3;
389 uint32 firstPix = (p1 >> 49) & 0x3F;
390 uint8 flags = (p1 >> 45) & 0x0F;
391 uint8 idx = (p1 >> 38) & 0x7F;
392 uint32 pitch = (p1 >> 15) & 0x07;
393 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",
394 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);
395 uint32 hscale = p2 & 0xFF;
396 uint32 vscale = (p2 >> 8) & 0xFF;
397 uint32 remainder = (p2 >> 16) & 0xFF;
398 WriteLog(" [hsc: %02X, vsc: %02X, rem: %02X]\n", hscale, vscale, remainder);
400 if ((p0 & 0x07) == OBJECT_TYPE_GPU)
401 WriteLog(" (GPU)\n");
402 if ((p0 & 0x07) == OBJECT_TYPE_BRANCH)
404 WriteLog(" (BRANCH)\n");
405 uint8 * jaguar_mainRam = GetRamPtr();
406 WriteLog("[RAM] --> ");
407 for(int k=0; k<8; k++)
408 WriteLog("%02X ", jaguar_mainRam[op_pointer-8 + k]);
411 if ((p0 & 0x07) == OBJECT_TYPE_STOP)
412 WriteLog(" --> List end\n");
415 switch ((uint8)p0 & 0x07)
417 case OBJECT_TYPE_BITMAP:
419 //WAS: uint16 ypos = (p0 >> 3) & 0x3FF;
420 uint16 ypos = (p0 >> 3) & 0x7FF;
421 // This is only theory implied by Rayman...!
422 // It seems that if the YPOS is zero, then bump the YPOS value so that it coincides with
423 // the VDB value. With interlacing, this would be slightly more tricky.
424 // There's probably another bit somewhere that enables this mode--but so far, doesn't seem
425 // to affect any other game in a negative way (that I've seen).
426 // Either that, or it's an undocumented bug...
428 //No, the reason this was needed is that the OP code before was wrong. Any value
429 //less than VDB will get written to the top line of the display!
431 // ypos = TOMReadWord(0xF00046, OP) / 2; // Get the VDB value
432 uint32 height = (p0 & 0xFFC000) >> 14;
433 uint32 oldOPP = op_pointer - 8;
434 // *** BEGIN OP PROCESSOR TESTING ONLY ***
435 if (inhibit && op_start_log)
436 WriteLog("!!! ^^^ This object is INHIBITED! ^^^ !!!\n");
438 if (!inhibit) // For OP testing only!
439 // *** END OP PROCESSOR TESTING ONLY ***
440 if (scanline >= ypos && height > 0)
442 uint64 p1 = op_load_phrase(op_pointer);
444 //WriteLog("OP: Writing scanline %d with ypos == %d...\n", scanline, ypos);
445 //WriteLog("--> Writing %u BPP bitmap...\n", op_bitmap_bit_depth[(p1 >> 12) & 0x07]);
446 // OPProcessFixedBitmap(scanline, p0, p1, render);
447 OPProcessFixedBitmap(p0, p1, render);
451 //???Does this really happen??? Doesn't seem to work if you do this...!
452 //Probably not. Must be a bug in the documentation...!
453 // uint32 link = (p0 & 0x7FFFF000000) >> 21;
454 // SET16(objectp_ram, 0x20, link & 0xFFFF); // OLP
455 // SET16(objectp_ram, 0x22, link >> 16);
456 /* uint32 height = (p0 & 0xFFC000) >> 14;
459 // NOTE: Would subtract 2 if in interlaced mode...!
460 // uint64 height = ((p0 & 0xFFC000) - 0x4000) & 0xFFC000;
464 uint64 data = (p0 & 0xFFFFF80000000000LL) >> 40;
465 uint64 dwidth = (p1 & 0xFFC0000) >> 15;
468 p0 &= ~0xFFFFF80000FFC000LL; // Mask out old data...
469 p0 |= (uint64)height << 14;
471 OPStorePhrase(oldOPP, p0);
473 //WriteLog("\t\tOld OP: %08X -> ", op_pointer);
474 //Temp, for testing...
475 //No doubt, this type of check will break all kinds of stuff... !!! FIX !!!
476 //And it does! !!! FIX !!!
477 //Let's remove this "fix" since it screws up more than it fixes.
478 /* if (op_pointer > ((p0 & 0x000007FFFF000000LL) >> 21))
481 op_pointer = (p0 & 0x000007FFFF000000LL) >> 21;
482 //WriteLog("New OP: %08X\n", op_pointer);
485 case OBJECT_TYPE_SCALE:
487 //WAS: uint16 ypos = (p0 >> 3) & 0x3FF;
488 uint16 ypos = (p0 >> 3) & 0x7FF;
489 uint32 height = (p0 & 0xFFC000) >> 14;
490 uint32 oldOPP = op_pointer - 8;
491 // *** BEGIN OP PROCESSOR TESTING ONLY ***
492 if (inhibit && op_start_log)
494 WriteLog("!!! ^^^ This object is INHIBITED! ^^^ !!! (scanline=%u, ypos=%u, height=%u)\n", scanline, ypos, height);
495 DumpScaledObject(p0, op_load_phrase(op_pointer), op_load_phrase(op_pointer+8));
498 if (!inhibit) // For OP testing only!
499 // *** END OP PROCESSOR TESTING ONLY ***
500 if (scanline >= ypos && height > 0)
502 uint64 p1 = op_load_phrase(op_pointer);
504 uint64 p2 = op_load_phrase(op_pointer);
506 //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));
507 OPProcessScaledBitmap(p0, p1, p2, render);
511 uint8 remainder = p2 >> 16, vscale = p2 >> 8;
512 //Actually, we should skip this object if it has a vscale of zero.
513 //Or do we? Not sure... Atari Karts has a few lines that look like:
515 //000E8268 --> phrase 00010000 7000B00D
516 // [7 (0) x 1 @ (13, 0) (8 bpp), l: 000E82A0, p: 000E0FC0 fp: 00, fl:RELEASE, idx:00, pt:01]
517 // [hsc: 9A, vsc: 00, rem: 00]
518 // Could it be the vscale is overridden if the DWIDTH is zero? Hmm...
521 vscale = 0x20; // OP bug??? Nope, it isn't...! Or is it?
523 //extern int start_logging;
525 // WriteLog("--> Returned from scaled bitmap processing (rem=%02X, vscale=%02X)...\n", remainder, vscale);//*/
527 //--> Returned from scaled bitmap processing (rem=20, vscale=80)...
528 //There are other problems here, it looks like...
530 //About to execute OP (508)...
532 OP: Scaled bitmap 4x? 4bpp at 38,? hscale=7C fpix=0 data=00075E28 pitch 1 hflipped=no dwidth=? (linked to 00071118) Transluency=no
533 --> Returned from scaled bitmap processing (rem=50, vscale=7C)...
534 OP: Scaled bitmap 4x? 4bpp at 38,? hscale=7C fpix=0 data=00075E28 pitch 1 hflipped=no dwidth=? (linked to 00071118) Transluency=no
535 --> Returned from scaled bitmap processing (rem=30, vscale=7C)...
536 OP: Scaled bitmap 4x? 4bpp at 38,? hscale=7C fpix=0 data=00075E28 pitch 1 hflipped=no dwidth=? (linked to 00071118) Transluency=no
537 --> Returned from scaled bitmap processing (rem=10, vscale=7C)...
538 OP: Scaled bitmap 4x? 4bpp at 36,? hscale=7E fpix=0 data=000756A8 pitch 1 hflipped=no dwidth=? (linked to 00073058) Transluency=no
539 --> Returned from scaled bitmap processing (rem=00, vscale=7E)...
540 OP: Scaled bitmap 4x? 4bpp at 34,? hscale=80 fpix=0 data=000756C8 pitch 1 hflipped=no dwidth=? (linked to 00073078) Transluency=no
541 --> Returned from scaled bitmap processing (rem=00, vscale=80)...
542 OP: Scaled bitmap 4x? 4bpp at 36,? hscale=7E fpix=0 data=000756C8 pitch 1 hflipped=no dwidth=? (linked to 00073058) Transluency=no
543 --> Returned from scaled bitmap processing (rem=5E, vscale=7E)...
544 OP: Scaled bitmap 4x? 4bpp at 34,? hscale=80 fpix=0 data=000756E8 pitch 1 hflipped=no dwidth=? (linked to 00073078) Transluency=no
545 --> Returned from scaled bitmap processing (rem=60, vscale=80)...
546 OP: Scaled bitmap 4x? 4bpp at 36,? hscale=7E fpix=0 data=000756C8 pitch 1 hflipped=no dwidth=? (linked to 00073058) Transluency=no
547 --> Returned from scaled bitmap processing (rem=3E, vscale=7E)...
548 OP: Scaled bitmap 4x? 4bpp at 34,? hscale=80 fpix=0 data=000756E8 pitch 1 hflipped=no dwidth=? (linked to 00073078) Transluency=no
549 --> Returned from scaled bitmap processing (rem=40, vscale=80)...
550 OP: Scaled bitmap 4x? 4bpp at 36,? hscale=7E fpix=0 data=000756C8 pitch 1 hflipped=no dwidth=? (linked to 00073058) Transluency=no
551 --> Returned from scaled bitmap processing (rem=1E, vscale=7E)...
552 OP: Scaled bitmap 4x? 4bpp at 34,? hscale=80 fpix=0 data=000756E8 pitch 1 hflipped=no dwidth=? (linked to 00073078) Transluency=no
553 --> Returned from scaled bitmap processing (rem=20, vscale=80)...
555 //Here's another problem:
556 // [hsc: 20, vsc: 20, rem: 00]
557 // Since we're not checking for $E0 (but that's what we get from the above), we end
558 // up repeating this scanline unnecessarily... !!! FIX !!! [DONE, but... still not quite
559 // right. Either that, or the Accolade team that wrote Bubsy screwed up royal.]
560 //Also note: $E0 = 7.0 which IS a legal vscale value...
562 // if (remainder & 0x80) // I.e., it's negative
563 // if ((remainder & 0x80) || remainder == 0) // I.e., it's <= 0
564 // if ((remainder - 1) >= 0xE0) // I.e., it's <= 0
565 // if ((remainder >= 0xE1) || remainder == 0)// I.e., it's <= 0
566 // if ((remainder >= 0xE1 && remainder <= 0xFF) || remainder == 0)// I.e., it's <= 0
567 if (remainder <= 0x20) // I.e., it's <= 0
569 uint64 data = (p0 & 0xFFFFF80000000000LL) >> 40;
570 uint64 dwidth = (p1 & 0xFFC0000) >> 15;
572 // while (remainder & 0x80)
573 // while ((remainder & 0x80) || remainder == 0)
574 // while ((remainder - 1) >= 0xE0)
575 // while ((remainder >= 0xE1) || remainder == 0)
576 // while ((remainder >= 0xE1 && remainder <= 0xFF) || remainder == 0)
577 while (remainder <= 0x20)
587 p0 &= ~0xFFFFF80000FFC000LL; // Mask out old data...
588 p0 |= (uint64)height << 14;
590 OPStorePhrase(oldOPP, p0);
593 remainder -= 0x20; // 1.0f in [3.5] fixed point format
596 // WriteLog("--> Finished writebacks...\n");//*/
598 //WriteLog(" [%08X%08X -> ", (uint32)(p2>>32), (uint32)(p2&0xFFFFFFFF));
599 p2 &= ~0x0000000000FF0000LL;
600 p2 |= (uint64)remainder << 16;
601 //WriteLog("%08X%08X]\n", (uint32)(p2>>32), (uint32)(p2&0xFFFFFFFF));
602 OPStorePhrase(oldOPP+16, p2);
603 //remainder = (uint8)(p2 >> 16), vscale = (uint8)(p2 >> 8);
604 //WriteLog(" [after]: rem=%02X, vscale=%02X\n", remainder, vscale);
606 op_pointer = (p0 & 0x000007FFFF000000LL) >> 21;
609 case OBJECT_TYPE_GPU:
611 //WriteLog("OP: Asserting GPU IRQ #3...\n");
612 op_set_current_object(p0);
613 GPUSetIRQLine(3, ASSERT_LINE);
614 //Also, OP processing is suspended from this point until OBF (F00026) is written to...
617 //OPSuspendedByGPU = true;
618 //Dunno if the OP keeps processing from where it was interrupted, or if it just continues
619 //on the next scanline...
620 // --> It continues from where it was interrupted! !!! FIX !!!
623 case OBJECT_TYPE_BRANCH:
625 uint16 ypos = (p0 >> 3) & 0x7FF;
626 uint8 cc = (p0 >> 14) & 0x03;
627 uint32 link = (p0 >> 21) & 0x3FFFF8;
629 // if ((ypos!=507)&&(ypos!=25))
630 // WriteLog("\t%i%s%i link=0x%.8x\n",scanline,condition_to_str[cc],ypos>>1,link);
633 case CONDITION_EQUAL:
634 if (TOMReadWord(0xF00006, OP) == ypos || ypos == 0x7FF)
637 case CONDITION_LESS_THAN:
638 if (TOMReadWord(0xF00006, OP) < ypos)
641 case CONDITION_GREATER_THAN:
642 if (TOMReadWord(0xF00006, OP) > ypos)
645 case CONDITION_OP_FLAG_SET:
646 if (op_get_status_register() & 0x01)
649 case CONDITION_SECOND_HALF_LINE:
650 // This basically means branch if bit 10 of HC is set
651 WriteLog("OP: Unexpected CONDITION_SECOND_HALF_LINE in BRANCH object\nOP: shuting down\n");
656 WriteLog("OP: Unimplemented branch condition %i\n", cc);
660 case OBJECT_TYPE_STOP:
664 //WriteLog("OP: --> STOP\n");
665 // op_set_status_register(((p0>>3) & 0xFFFFFFFF));
666 //This seems more likely...
667 op_set_current_object(p0);
671 tom_set_pending_object_int();
672 if (tom_irq_enabled(IRQ_OPFLAG))// && jaguar_interrupt_handler_is_valid(64))
673 m68k_set_irq(7); // Cause an NMI to occur...
680 WriteLog("op: unknown object type %i\n", ((uint8)p0 & 0x07));
684 // Here is a little sanity check to keep the OP from locking up the machine
685 // when fed bad data. Better would be to count how many actual cycles it used
686 // and bail out/reenter to properly simulate an overloaded OP... !!! FIX !!!
694 // Store fixed size bitmap in line buffer
696 void OPProcessFixedBitmap(uint64 p0, uint64 p1, bool render)
698 // Need to make sure that when writing that it stays within the line buffer...
699 // LBUF ($F01800 - $F01D9E) 360 x 32-bit RAM
700 uint8 depth = (p1 >> 12) & 0x07; // Color depth of image
701 int32 xpos = ((int16)((p1 << 4) & 0xFFFF)) >> 4;// Image xpos in LBUF
702 uint32 iwidth = (p1 >> 28) & 0x3FF; // Image width in *phrases*
703 uint32 data = (p0 >> 40) & 0xFFFFF8; // Pixel data address
704 //#ifdef OP_DEBUG_BMP
705 uint32 firstPix = (p1 >> 49) & 0x3F;
706 // "The LSB is significant only for scaled objects..." -JTRM
707 // "In 1 BPP mode, all five bits are significant. In 2 BPP mode, the top four are significant..."
710 // We can ignore the RELEASE (high order) bit for now--probably forever...!
711 // uint8 flags = (p1 >> 45) & 0x0F; // REFLECT, RMW, TRANS, RELEASE
712 //Optimize: break these out to their own BOOL values
713 uint8 flags = (p1 >> 45) & 0x07; // REFLECT (0), RMW (1), TRANS (2)
714 bool flagREFLECT = (flags & OPFLAG_REFLECT ? true : false),
715 flagRMW = (flags & OPFLAG_RMW ? true : false),
716 flagTRANS = (flags & OPFLAG_TRANS ? true : false);
717 // "For images with 1 to 4 bits/pixel the top 7 to 4 bits of the index
718 // provide the most significant bits of the palette address."
719 uint8 index = (p1 >> 37) & 0xFE; // CLUT index offset (upper pix, 1-4 bpp)
720 uint32 pitch = (p1 >> 15) & 0x07; // Phrase pitch
721 pitch <<= 3; // Optimization: Multiply pitch by 8
723 // int16 scanlineWidth = tom_getVideoModeWidth();
724 uint8 * tom_ram_8 = tom_get_ram_pointer();
725 uint8 * paletteRAM = &tom_ram_8[0x400];
726 // This is OK as long as it's used correctly: For 16-bit RAM to RAM direct copies--NOT
727 // for use when using endian-corrected data (i.e., any of the *_word_read functions!)
728 uint16 * paletteRAM16 = (uint16 *)paletteRAM;
730 // WriteLog("bitmap %ix? %ibpp at %i,? firstpix=? data=0x%.8x pitch %i hflipped=%s dwidth=? (linked to ?) RMW=%s Tranparent=%s\n",
731 // iwidth, op_bitmap_bit_depth[bitdepth], xpos, ptr, pitch, (flags&OPFLAG_REFLECT ? "yes" : "no"), (flags&OPFLAG_RMW ? "yes" : "no"), (flags&OPFLAG_TRANS ? "yes" : "no"));
733 // Is it OK to have a 0 for the data width??? (i.e., undocumented?)
734 // Seems to be... Seems that dwidth *can* be zero (i.e., reuse same line) as well.
735 // Pitch == 0 is OK too...
736 // if (!render || op_pointer == 0 || ptr == 0 || pitch == 0)
737 //I'm not convinced that we need to concern ourselves with data & op_pointer here either!
738 if (!render || iwidth == 0)
741 //#define OP_DEBUG_BMP
742 //#ifdef OP_DEBUG_BMP
743 // 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",
744 // 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"));
747 // int32 leftMargin = xpos, rightMargin = (xpos + (phraseWidthToPixels[depth] * iwidth)) - 1;
748 int32 startPos = xpos, endPos = xpos +
749 (!flagREFLECT ? (phraseWidthToPixels[depth] * iwidth) - 1
750 : -((phraseWidthToPixels[depth] * iwidth) + 1));
751 uint32 clippedWidth = 0, phraseClippedWidth = 0, dataClippedWidth = 0;//, phrasePixel = 0;
752 bool in24BPPMode = (((GET16(tom_ram_8, 0x0028) >> 1) & 0x03) == 1 ? true : false); // VMODE
753 // Not sure if this is Jaguar Two only location or what...
754 // From the docs, it is... If we want to limit here we should think of something else.
755 // int32 limit = GET16(tom_ram_8, 0x0008); // LIMIT
757 int32 lbufWidth = (!in24BPPMode ? limit - 1 : (limit / 2) - 1); // Zero based limit...
759 // If the image is completely to the left or right of the line buffer, then bail.
760 //If in REFLECT mode, then these values are swapped! !!! FIX !!! [DONE]
761 //There are four possibilities:
762 // 1. image sits on left edge and no REFLECT; starts out of bounds but ends in bounds.
763 // 2. image sits on left edge and REFLECT; starts in bounds but ends out of bounds.
764 // 3. image sits on right edge and REFLECT; starts out of bounds but ends in bounds.
765 // 4. image sits on right edge and no REFLECT; starts in bounds but ends out of bounds.
766 //Numbers 2 & 4 can be caught by checking the LBUF clip while in the inner loop,
767 // numbers 1 & 3 are of concern.
768 // This *indirectly* handles only cases 2 & 4! And is WRONG is REFLECT is set...!
769 // if (rightMargin < 0 || leftMargin > lbufWidth)
771 // It might be easier to swap these (if REFLECTed) and just use XPOS down below...
772 // That way, you could simply set XPOS to leftMargin if !REFLECT and to rightMargin otherwise.
773 // Still have to be careful with the DATA and IWIDTH values though...
775 // if ((!flagREFLECT && (rightMargin < 0 || leftMargin > lbufWidth))
776 // || (flagREFLECT && (leftMargin < 0 || rightMargin > lbufWidth)))
778 if ((!flagREFLECT && (endPos < 0 || startPos > lbufWidth))
779 || (flagREFLECT && (startPos < 0 || endPos > lbufWidth)))
782 // Otherwise, find the clip limits and clip the phrase as well...
783 // NOTE: I'm fudging here by letting the actual blit overstep the bounds of the
784 // line buffer, but it shouldn't matter since there are two unused line
785 // buffers below and nothing above and I'll at most write 8 bytes outside
786 // the line buffer... I could use a fractional clip begin/end value, but
787 // this makes the blit a *lot* more hairy. I might fix this in the future
788 // if it becomes necessary. (JLH)
789 // Probably wouldn't be *that* hairy. Just use a delta that tells the inner loop
790 // which pixel in the phrase is being written, and quit when either end of phrases
791 // is reached or line buffer extents are surpassed.
793 //This stuff is probably wrong as well... !!! FIX !!!
794 //The strange thing is that it seems to work, but that's no guarantee that it's bulletproof!
795 //Yup. Seems that JagMania doesn't work correctly with this...
796 //Dunno if this is the problem, but Atari Karts is showing *some* of the road now...
801 clippedWidth = 0 - leftMargin,
802 phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth],
803 leftMargin = 0 - (clippedWidth % phraseWidthToPixels[depth]);
806 if (rightMargin > lbufWidth)
807 clippedWidth = rightMargin - lbufWidth,
808 phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth];//,
809 // rightMargin = lbufWidth + (clippedWidth % phraseWidthToPixels[depth]);
810 // rightMargin = lbufWidth;
813 WriteLog("OP: We're about to encounter a divide by zero error!\n");
814 // NOTE: We're just using endPos to figure out how much, if any, to clip by.
815 // ALSO: There may be another case where we start out of bounds and end out of bounds...!
817 if (startPos < 0) // Case #1: Begin out, end in, L to R
818 clippedWidth = 0 - startPos,
819 dataClippedWidth = phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth],
820 startPos = 0 - (clippedWidth % phraseWidthToPixels[depth]);
822 if (endPos < 0) // Case #2: Begin in, end out, R to L
823 clippedWidth = 0 - endPos,
824 phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth];
826 if (endPos > lbufWidth) // Case #3: Begin in, end out, L to R
827 clippedWidth = endPos - lbufWidth,
828 phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth];
830 if (startPos > lbufWidth) // Case #4: Begin out, end in, R to L
831 clippedWidth = startPos - lbufWidth,
832 dataClippedWidth = phraseClippedWidth = clippedWidth / phraseWidthToPixels[depth],
833 startPos = lbufWidth + (clippedWidth % phraseWidthToPixels[depth]);
835 // If the image is sitting on the line buffer left or right edge, we need to compensate
836 // by decreasing the image phrase width accordingly.
837 iwidth -= phraseClippedWidth;
839 // Also, if we're clipping the phrase we need to make sure we're in the correct part of
841 // data += phraseClippedWidth * (pitch << 3);
842 data += dataClippedWidth * pitch;
844 // NOTE: When the bitmap is in REFLECT mode, the XPOS marks the *right* side of the
845 // bitmap! This makes clipping & etc. MUCH, much easier...!
846 // uint32 lbufAddress = 0x1800 + (!in24BPPMode ? leftMargin * 2 : leftMargin * 4);
847 //Why does this work right when multiplying startPos by 2 (instead of 4) for 24 BPP mode?
848 //Is this a bug in the OP?
849 uint32 lbufAddress = 0x1800 + (!in24BPPMode ? startPos * 2 : startPos * 2);
850 uint8 * currentLineBuffer = &tom_ram_8[lbufAddress];
854 // Hmm. We check above for 24 BPP mode, but don't do anything about it below...
855 // If we *were* in 24 BPP mode, how would you convert CRY to RGB24? Seems to me
856 // that if you're in CRY mode then you wouldn't be able to use 24 BPP bitmaps
858 // This seems to be the case (at least according to the Midsummer docs)...!
860 if (depth == 0) // 1 BPP
862 // The LSB of flags is OPFLAG_REFLECT, so sign extend it and or 2 into it.
863 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
865 // Fetch 1st phrase...
866 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
867 //Note that firstPix should only be honored *if* we start with the 1st phrase of the bitmap
868 //i.e., we didn't clip on the margin... !!! FIX !!!
869 pixels <<= firstPix; // Skip first N pixels (N=firstPix)...
870 int i = firstPix; // Start counter at right spot...
876 uint8 bit = pixels >> 63;
877 if (flagTRANS && bit == 0)
882 //Optimize: Set palleteRAM16 to beginning of palette RAM + index*2 and use only [bit] as index...
883 //Won't optimize RMW case though...
884 // This is the *only* correct use of endian-dependent code
885 // (i.e., mem-to-mem direct copying)!
886 *(uint16 *)currentLineBuffer = paletteRAM16[index | bit];
889 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bit) << 1]),
890 *(currentLineBuffer + 1) =
891 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bit) << 1) + 1]);
894 currentLineBuffer += lbufDelta;
898 // Fetch next phrase...
900 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
903 else if (depth == 1) // 2 BPP
906 WriteLog("OP: Fixed bitmap @ 2 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
907 index &= 0xFC; // Top six bits form CLUT index
908 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
909 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
914 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
917 for(int i=0; i<32; i++)
919 uint8 bits = pixels >> 62;
920 // Seems to me that both of these are in the same endian, so we could cast it as
921 // uint16 * and do straight across copies (what about 24 bpp? Treat it differently...)
922 // This only works for the palettized modes (1 - 8 BPP), since we actually have to
923 // copy data from memory in 16 BPP mode (or does it? Isn't this the same as the CLUT case?)
924 // No, it isn't because we read the memory in an endian safe way--this *won't* work...
925 if (flagTRANS && bits == 0)
930 *(uint16 *)currentLineBuffer = paletteRAM16[index | bits];
933 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bits) << 1]),
934 *(currentLineBuffer + 1) =
935 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bits) << 1) + 1]);
938 currentLineBuffer += lbufDelta;
943 else if (depth == 2) // 4 BPP
946 WriteLog("OP: Fixed bitmap @ 4 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
947 index &= 0xF0; // Top four bits form CLUT index
948 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
949 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
954 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
957 for(int i=0; i<16; i++)
959 uint8 bits = pixels >> 60;
960 // Seems to me that both of these are in the same endian, so we could cast it as
961 // uint16 * and do straight across copies (what about 24 bpp? Treat it differently...)
962 // This only works for the palettized modes (1 - 8 BPP), since we actually have to
963 // copy data from memory in 16 BPP mode (or does it? Isn't this the same as the CLUT case?)
964 // No, it isn't because we read the memory in an endian safe way--this *won't* work...
965 if (flagTRANS && bits == 0)
970 *(uint16 *)currentLineBuffer = paletteRAM16[index | bits];
973 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bits) << 1]),
974 *(currentLineBuffer + 1) =
975 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bits) << 1) + 1]);
978 currentLineBuffer += lbufDelta;
983 else if (depth == 3) // 8 BPP
985 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
986 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
988 // Fetch 1st phrase...
989 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
990 //Note that firstPix should only be honored *if* we start with the 1st phrase of the bitmap
991 //i.e., we didn't clip on the margin... !!! FIX !!!
992 firstPix &= 0x30; // Only top two bits are valid for 8 BPP
993 pixels <<= firstPix; // Skip first N pixels (N=firstPix)...
994 int i = firstPix >> 3; // Start counter at right spot...
1000 uint8 bits = pixels >> 56;
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[bits];
1013 *currentLineBuffer =
1014 BLEND_CR(*currentLineBuffer, paletteRAM[bits << 1]),
1015 *(currentLineBuffer + 1) =
1016 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[(bits << 1) + 1]);
1019 currentLineBuffer += lbufDelta;
1023 // Fetch next phrase...
1025 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1028 else if (depth == 4) // 16 BPP
1031 WriteLog("OP: Fixed bitmap @ 16 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
1032 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
1033 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1038 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1041 for(int i=0; i<4; i++)
1043 uint8 bitsHi = pixels >> 56, bitsLo = pixels >> 48;
1044 // Seems to me that both of these are in the same endian, so we could cast it as
1045 // uint16 * and do straight across copies (what about 24 bpp? Treat it differently...)
1046 // This only works for the palettized modes (1 - 8 BPP), since we actually have to
1047 // copy data from memory in 16 BPP mode (or does it? Isn't this the same as the CLUT case?)
1048 // No, it isn't because we read the memory in an endian safe way--it *won't* work...
1049 if (flagTRANS && (bitsLo | bitsHi) == 0)
1054 *currentLineBuffer = bitsHi,
1055 *(currentLineBuffer + 1) = bitsLo;
1057 *currentLineBuffer =
1058 BLEND_CR(*currentLineBuffer, bitsHi),
1059 *(currentLineBuffer + 1) =
1060 BLEND_Y(*(currentLineBuffer + 1), bitsLo);
1063 currentLineBuffer += lbufDelta;
1068 else if (depth == 5) // 24 BPP
1070 //Looks like Iron Soldier is the only game that uses 24BPP mode...
1071 //There *might* be others...
1072 //WriteLog("OP: Writing 24 BPP bitmap!\n");
1074 WriteLog("OP: Fixed bitmap @ 24 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
1075 // Not sure, but I think RMW only works with 16 BPP and below, and only in CRY mode...
1076 // The LSB of flags is OPFLAG_REFLECT, so sign extend it and OR 4 into it.
1077 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 4) | 0x04;
1082 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1085 for(int i=0; i<2; i++)
1087 // We don't use a 32-bit var here because of endian issues...!
1088 uint8 bits3 = pixels >> 56, bits2 = pixels >> 48,
1089 bits1 = pixels >> 40, bits0 = pixels >> 32;
1091 if (flagTRANS && (bits3 | bits2 | bits1 | bits0) == 0)
1094 *currentLineBuffer = bits3,
1095 *(currentLineBuffer + 1) = bits2,
1096 *(currentLineBuffer + 2) = bits1,
1097 *(currentLineBuffer + 3) = bits0;
1099 currentLineBuffer += lbufDelta;
1107 // Store scaled bitmap in line buffer
1109 void OPProcessScaledBitmap(uint64 p0, uint64 p1, uint64 p2, bool render)
1111 // Need to make sure that when writing that it stays within the line buffer...
1112 // LBUF ($F01800 - $F01D9E) 360 x 32-bit RAM
1113 uint8 depth = (p1 >> 12) & 0x07; // Color depth of image
1114 int32 xpos = ((int16)((p1 << 4) & 0xFFFF)) >> 4;// Image xpos in LBUF
1115 uint32 iwidth = (p1 >> 28) & 0x3FF; // Image width in *phrases*
1116 uint32 data = (p0 >> 40) & 0xFFFFF8; // Pixel data address
1117 //#ifdef OP_DEBUG_BMP
1118 // Prolly should use this... Though not sure exactly how.
1119 //Use the upper bits as an offset into the phrase depending on the BPP. That's how!
1120 uint32 firstPix = (p1 >> 49) & 0x3F;
1121 //This is WEIRD! I'm sure I saw Atari Karts request 8 BPP FIRSTPIX! What happened???
1123 WriteLog("OP: FIRSTPIX != 0! (Scaled BM)\n");
1125 // We can ignore the RELEASE (high order) bit for now--probably forever...!
1126 // uint8 flags = (p1 >> 45) & 0x0F; // REFLECT, RMW, TRANS, RELEASE
1127 //Optimize: break these out to their own BOOL values [DONE]
1128 uint8 flags = (p1 >> 45) & 0x07; // REFLECT (0), RMW (1), TRANS (2)
1129 bool flagREFLECT = (flags & OPFLAG_REFLECT ? true : false),
1130 flagRMW = (flags & OPFLAG_RMW ? true : false),
1131 flagTRANS = (flags & OPFLAG_TRANS ? true : false);
1132 uint8 index = (p1 >> 37) & 0xFE; // CLUT index offset (upper pix, 1-4 bpp)
1133 uint32 pitch = (p1 >> 15) & 0x07; // Phrase pitch
1135 uint8 * tom_ram_8 = tom_get_ram_pointer();
1136 uint8 * paletteRAM = &tom_ram_8[0x400];
1137 // This is OK as long as it's used correctly: For 16-bit RAM to RAM direct copies--NOT
1138 // for use when using endian-corrected data (i.e., any of the *ReadWord functions!)
1139 uint16 * paletteRAM16 = (uint16 *)paletteRAM;
1141 uint8 hscale = p2 & 0xFF;
1142 // Hmm. It seems that fixing the horizontal scale necessitated re-fixing this. Not sure why,
1143 // but seems to be consistent with the vertical scaling now (and it may turn out to be wrong!)...
1144 uint8 horizontalRemainder = hscale; // Not sure if it starts full, but seems reasonable [It's not!]
1145 // uint8 horizontalRemainder = 0; // Let's try zero! Seems to work! Yay! [No, it doesn't!]
1146 int32 scaledWidthInPixels = (iwidth * phraseWidthToPixels[depth] * hscale) >> 5;
1147 uint32 scaledPhrasePixels = (phraseWidthToPixels[depth] * hscale) >> 5;
1149 // WriteLog("bitmap %ix? %ibpp at %i,? firstpix=? data=0x%.8x pitch %i hflipped=%s dwidth=? (linked to ?) RMW=%s Tranparent=%s\n",
1150 // iwidth, op_bitmap_bit_depth[bitdepth], xpos, ptr, pitch, (flags&OPFLAG_REFLECT ? "yes" : "no"), (flags&OPFLAG_RMW ? "yes" : "no"), (flags&OPFLAG_TRANS ? "yes" : "no"));
1152 // Looks like an hscale of zero means don't draw!
1153 if (!render || iwidth == 0 || hscale == 0)
1156 /*extern int start_logging;
1158 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",
1159 iwidth, op_bitmap_bit_depth[depth], xpos, hscale, firstPix, data, pitch, (flagREFLECT ? "yes" : "no"), op_pointer, (flagRMW ? "yes" : "no"));*/
1160 //#define OP_DEBUG_BMP
1161 //#ifdef OP_DEBUG_BMP
1162 // 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",
1163 // 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"));
1166 int32 startPos = xpos, endPos = xpos +
1167 (!flagREFLECT ? scaledWidthInPixels - 1 : -(scaledWidthInPixels + 1));
1168 uint32 clippedWidth = 0, phraseClippedWidth = 0, dataClippedWidth = 0;
1169 bool in24BPPMode = (((GET16(tom_ram_8, 0x0028) >> 1) & 0x03) == 1 ? true : false); // VMODE
1170 // Not sure if this is Jaguar Two only location or what...
1171 // From the docs, it is... If we want to limit here we should think of something else.
1172 // int32 limit = GET16(tom_ram_8, 0x0008); // LIMIT
1174 int32 lbufWidth = (!in24BPPMode ? limit - 1 : (limit / 2) - 1); // Zero based limit...
1176 // If the image is completely to the left or right of the line buffer, then bail.
1177 //If in REFLECT mode, then these values are swapped! !!! FIX !!! [DONE]
1178 //There are four possibilities:
1179 // 1. image sits on left edge and no REFLECT; starts out of bounds but ends in bounds.
1180 // 2. image sits on left edge and REFLECT; starts in bounds but ends out of bounds.
1181 // 3. image sits on right edge and REFLECT; starts out of bounds but ends in bounds.
1182 // 4. image sits on right edge and no REFLECT; starts in bounds but ends out of bounds.
1183 //Numbers 2 & 4 can be caught by checking the LBUF clip while in the inner loop,
1184 // numbers 1 & 3 are of concern.
1185 // This *indirectly* handles only cases 2 & 4! And is WRONG if REFLECT is set...!
1186 // if (rightMargin < 0 || leftMargin > lbufWidth)
1188 // It might be easier to swap these (if REFLECTed) and just use XPOS down below...
1189 // That way, you could simply set XPOS to leftMargin if !REFLECT and to rightMargin otherwise.
1190 // Still have to be careful with the DATA and IWIDTH values though...
1192 if ((!flagREFLECT && (endPos < 0 || startPos > lbufWidth))
1193 || (flagREFLECT && (startPos < 0 || endPos > lbufWidth)))
1196 // Otherwise, find the clip limits and clip the phrase as well...
1197 // NOTE: I'm fudging here by letting the actual blit overstep the bounds of the
1198 // line buffer, but it shouldn't matter since there are two unused line
1199 // buffers below and nothing above and I'll at most write 40 bytes outside
1200 // the line buffer... I could use a fractional clip begin/end value, but
1201 // this makes the blit a *lot* more hairy. I might fix this in the future
1202 // if it becomes necessary. (JLH)
1203 // Probably wouldn't be *that* hairy. Just use a delta that tells the inner loop
1204 // which pixel in the phrase is being written, and quit when either end of phrases
1205 // is reached or line buffer extents are surpassed.
1207 //This stuff is probably wrong as well... !!! FIX !!!
1208 //The strange thing is that it seems to work, but that's no guarantee that it's bulletproof!
1209 //Yup. Seems that JagMania doesn't work correctly with this...
1210 //Dunno if this is the problem, but Atari Karts is showing *some* of the road now...
1211 //Actually, it is! Or, it was. It doesn't seem to be clipping here, so the problem lies
1212 //elsewhere! Hmm. Putting the scaling code into the 1/2/8 BPP cases seems to draw the ground
1213 // a bit more accurately... Strange!
1214 //It's probably a case of the REFLECT flag being set and the background being written
1215 //from the right side of the screen...
1216 //But no, it isn't... At least if the diagnostics are telling the truth!
1218 // NOTE: We're just using endPos to figure out how much, if any, to clip by.
1219 // ALSO: There may be another case where we start out of bounds and end out of bounds...!
1222 //There's a problem here with scaledPhrasePixels in that it can be forced to zero when
1223 //the scaling factor is small. So fix it already! !!! FIX !!!
1224 /*if (scaledPhrasePixels == 0)
1226 WriteLog("OP: [Scaled] We're about to encounter a divide by zero error!\n");
1227 DumpScaledObject(p0, p1, p2);
1229 //NOTE: I'm almost 100% sure that this is wrong... And it is! :-p
1231 //Try a simple example...
1232 // Let's say we have a 8 BPP scanline with an hscale of $80 (4). Our xpos is -10,
1233 // non-flipped. Pixels in the bitmap are XYZXYZXYZXYZXYZ.
1234 // Scaled up, they would be XXXXYYYYZZZZXXXXYYYYZZZZXXXXYYYYZZZZ...
1236 // Normally, we would expect this in the line buffer:
1237 // ZZXXXXYYYYZZZZXXXXYYYYZZZZ...
1239 // But instead we're getting:
1240 // XXXXYYYYZZZZXXXXYYYYZZZZ...
1242 // or are we??? It would seem so, simply by virtue of the fact that we're NOT starting
1243 // on negative boundary--or are we? Hmm...
1244 // cw = 10, dcw = pcw = 10 / ([8 * 4 = 32] 32) = 0, sp = -10
1246 // Let's try a real world example:
1248 //OP: Scaled bitmap (70, 8 BPP, spp=28) sp (-400) < 0... [new sp=-8, cw=400, dcw=pcw=14]
1249 //OP: Scaled bitmap (6F, 8 BPP, spp=27) sp (-395) < 0... [new sp=-17, cw=395, dcw=pcw=14]
1251 // Really, spp is 27.75 in the second case...
1252 // So... If we do 395 / 27.75, we get 14. Ok so far... If we scale that against the
1253 // start position (14 * 27.75), we get -6.5... NOT -17!
1255 //Now it seems we're working OK, at least for the first case...
1256 uint32 scaledPhrasePixelsUS = phraseWidthToPixels[depth] * hscale;
1258 if (startPos < 0) // Case #1: Begin out, end in, L to R
1260 extern int start_logging;
1262 WriteLog("OP: Scaled bitmap (%02X, %u BPP, spp=%u) start pos (%i) < 0...", hscale, op_bitmap_bit_depth[depth], scaledPhrasePixels, startPos);
1263 // clippedWidth = 0 - startPos,
1264 clippedWidth = (0 - startPos) << 5,
1265 // dataClippedWidth = phraseClippedWidth = clippedWidth / scaledPhrasePixels,
1266 dataClippedWidth = phraseClippedWidth = (clippedWidth / scaledPhrasePixelsUS) >> 5,
1267 // startPos = 0 - (clippedWidth % scaledPhrasePixels);
1268 startPos += (dataClippedWidth * scaledPhrasePixelsUS) >> 5;
1270 WriteLog(" [new sp=%i, cw=%i, dcw=pcw=%i]\n", startPos, clippedWidth, dataClippedWidth);
1273 if (endPos < 0) // Case #2: Begin in, end out, R to L
1274 clippedWidth = 0 - endPos,
1275 phraseClippedWidth = clippedWidth / scaledPhrasePixels;
1277 if (endPos > lbufWidth) // Case #3: Begin in, end out, L to R
1278 clippedWidth = endPos - lbufWidth,
1279 phraseClippedWidth = clippedWidth / scaledPhrasePixels;
1281 if (startPos > lbufWidth) // Case #4: Begin out, end in, R to L
1282 clippedWidth = startPos - lbufWidth,
1283 dataClippedWidth = phraseClippedWidth = clippedWidth / scaledPhrasePixels,
1284 startPos = lbufWidth + (clippedWidth % scaledPhrasePixels);
1286 extern int op_start_log;
1287 if (op_start_log && clippedWidth != 0)
1288 WriteLog("OP: Clipped line. SP=%i, EP=%i, clip=%u, iwidth=%u, hscale=%02X\n", startPos, endPos, clippedWidth, iwidth, hscale);
1289 if (op_start_log && startPos == 13)
1291 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);
1292 DumpScaledObject(p0, p1, p2);
1295 WriteLog(" %08X: ", data);
1296 for(int i=0; i<7*8; i++)
1297 WriteLog("%02X ", JaguarReadByte(data+i));
1301 // If the image is sitting on the line buffer left or right edge, we need to compensate
1302 // by decreasing the image phrase width accordingly.
1303 iwidth -= phraseClippedWidth;
1305 // Also, if we're clipping the phrase we need to make sure we're in the correct part of
1307 // data += phraseClippedWidth * (pitch << 3);
1308 data += dataClippedWidth * (pitch << 3);
1310 // NOTE: When the bitmap is in REFLECT mode, the XPOS marks the *right* side of the
1311 // bitmap! This makes clipping & etc. MUCH, much easier...!
1312 // uint32 lbufAddress = 0x1800 + (!in24BPPMode ? leftMargin * 2 : leftMargin * 4);
1313 // uint32 lbufAddress = 0x1800 + (!in24BPPMode ? startPos * 2 : startPos * 4);
1314 uint32 lbufAddress = 0x1800 + startPos * 2;
1315 uint8 * currentLineBuffer = &tom_ram_8[lbufAddress];
1316 //uint8 * lineBufferLowerLimit = &tom_ram_8[0x1800],
1317 // * lineBufferUpperLimit = &tom_ram_8[0x1800 + 719];
1321 // Hmm. We check above for 24 BPP mode, but don't do anything about it below...
1322 // If we *were* in 24 BPP mode, how would you convert CRY to RGB24? Seems to me
1323 // that if you're in CRY mode then you wouldn't be able to use 24 BPP bitmaps
1325 // This seems to be the case (at least according to the Midsummer docs)...!
1327 if (depth == 0) // 1 BPP
1330 WriteLog("OP: Scaled bitmap @ 1 BPP requesting FIRSTPIX!\n");
1331 // The LSB of flags is OPFLAG_REFLECT, so sign extend it and or 2 into it.
1332 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1335 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1337 while ((int32)iwidth > 0)
1339 uint8 bits = pixels >> 63;
1341 if (flagTRANS && bits == 0)
1346 // This is the *only* correct use of endian-dependent code
1347 // (i.e., mem-to-mem direct copying)!
1348 *(uint16 *)currentLineBuffer = paletteRAM16[index | bits];
1350 *currentLineBuffer =
1351 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bits) << 1]),
1352 *(currentLineBuffer + 1) =
1353 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bits) << 1) + 1]);
1356 currentLineBuffer += lbufDelta;
1358 /* horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1359 while (horizontalRemainder & 0x80)
1361 horizontalRemainder += hscale;
1365 while (horizontalRemainder <= 0x20) // I.e., it's <= 0 (*before* subtraction)
1367 horizontalRemainder += hscale;
1371 horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1375 int phrasesToSkip = pixCount / 64, pixelShift = pixCount % 64;
1377 data += (pitch << 3) * phrasesToSkip;
1378 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1379 pixels <<= 1 * pixelShift;
1380 iwidth -= phrasesToSkip;
1381 pixCount = pixelShift;
1385 else if (depth == 1) // 2 BPP
1388 WriteLog("OP: Scaled bitmap @ 2 BPP requesting FIRSTPIX!\n");
1389 index &= 0xFC; // Top six bits form CLUT index
1390 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
1391 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1394 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1396 while ((int32)iwidth > 0)
1398 uint8 bits = pixels >> 62;
1400 if (flagTRANS && bits == 0)
1405 // This is the *only* correct use of endian-dependent code
1406 // (i.e., mem-to-mem direct copying)!
1407 *(uint16 *)currentLineBuffer = paletteRAM16[index | bits];
1409 *currentLineBuffer =
1410 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bits) << 1]),
1411 *(currentLineBuffer + 1) =
1412 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bits) << 1) + 1]);
1415 currentLineBuffer += lbufDelta;
1417 /* horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1418 while (horizontalRemainder & 0x80)
1420 horizontalRemainder += hscale;
1424 while (horizontalRemainder <= 0x20) // I.e., it's <= 0 (*before* subtraction)
1426 horizontalRemainder += hscale;
1430 horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1434 int phrasesToSkip = pixCount / 32, pixelShift = pixCount % 32;
1436 data += (pitch << 3) * phrasesToSkip;
1437 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1438 pixels <<= 2 * pixelShift;
1439 iwidth -= phrasesToSkip;
1440 pixCount = pixelShift;
1444 else if (depth == 2) // 4 BPP
1447 WriteLog("OP: Scaled bitmap @ 4 BPP requesting FIRSTPIX!\n");
1448 index &= 0xF0; // Top four bits form CLUT index
1449 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
1450 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1453 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1455 while ((int32)iwidth > 0)
1457 uint8 bits = pixels >> 60;
1459 if (flagTRANS && bits == 0)
1464 // This is the *only* correct use of endian-dependent code
1465 // (i.e., mem-to-mem direct copying)!
1466 *(uint16 *)currentLineBuffer = paletteRAM16[index | bits];
1468 *currentLineBuffer =
1469 BLEND_CR(*currentLineBuffer, paletteRAM[(index | bits) << 1]),
1470 *(currentLineBuffer + 1) =
1471 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[((index | bits) << 1) + 1]);
1474 currentLineBuffer += lbufDelta;
1476 /* horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1477 while (horizontalRemainder & 0x80)
1479 horizontalRemainder += hscale;
1483 while (horizontalRemainder <= 0x20) // I.e., it's <= 0 (*before* subtraction)
1485 horizontalRemainder += hscale;
1489 horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1493 int phrasesToSkip = pixCount / 16, pixelShift = pixCount % 16;
1495 data += (pitch << 3) * phrasesToSkip;
1496 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1497 pixels <<= 4 * pixelShift;
1498 iwidth -= phrasesToSkip;
1499 pixCount = pixelShift;
1503 else if (depth == 3) // 8 BPP
1506 WriteLog("OP: Scaled bitmap @ 8 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
1507 // The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
1508 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1511 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1513 while ((int32)iwidth > 0)
1515 uint8 bits = pixels >> 56;
1517 if (flagTRANS && bits == 0)
1522 // This is the *only* correct use of endian-dependent code
1523 // (i.e., mem-to-mem direct copying)!
1524 *(uint16 *)currentLineBuffer = paletteRAM16[bits];
1526 if (currentLineBuffer >= lineBufferLowerLimit && currentLineBuffer <= lineBufferUpperLimit)
1527 *(uint16 *)currentLineBuffer = paletteRAM16[bits];
1530 *currentLineBuffer =
1531 BLEND_CR(*currentLineBuffer, paletteRAM[bits << 1]),
1532 *(currentLineBuffer + 1) =
1533 BLEND_Y(*(currentLineBuffer + 1), paletteRAM[(bits << 1) + 1]);
1536 currentLineBuffer += lbufDelta;
1538 while (horizontalRemainder <= 0x20) // I.e., it's <= 0 (*before* subtraction)
1540 horizontalRemainder += hscale;
1544 horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1548 int phrasesToSkip = pixCount / 8, pixelShift = pixCount % 8;
1550 data += (pitch << 3) * phrasesToSkip;
1551 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1552 pixels <<= 8 * pixelShift;
1553 iwidth -= phrasesToSkip;
1554 pixCount = pixelShift;
1558 else if (depth == 4) // 16 BPP
1561 WriteLog("OP: Scaled bitmap @ 16 BPP requesting FIRSTPIX!\n");
1562 // The LSB is OPFLAG_REFLECT, so sign extend it and OR 2 into it.
1563 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
1566 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1568 while ((int32)iwidth > 0)
1570 uint8 bitsHi = pixels >> 56, bitsLo = pixels >> 48;
1572 if (flagTRANS && (bitsLo | bitsHi) == 0)
1577 *currentLineBuffer = bitsHi,
1578 *(currentLineBuffer + 1) = bitsLo;
1580 *currentLineBuffer =
1581 BLEND_CR(*currentLineBuffer, bitsHi),
1582 *(currentLineBuffer + 1) =
1583 BLEND_Y(*(currentLineBuffer + 1), bitsLo);
1586 currentLineBuffer += lbufDelta;
1588 /* horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1589 while (horizontalRemainder & 0x80)
1591 horizontalRemainder += hscale;
1595 while (horizontalRemainder <= 0x20) // I.e., it's <= 0 (*before* subtraction)
1597 horizontalRemainder += hscale;
1601 horizontalRemainder -= 0x20; // Subtract 1.0f in [3.5] fixed point format
1605 int phrasesToSkip = pixCount / 4, pixelShift = pixCount % 4;
1607 data += (pitch << 3) * phrasesToSkip;
1608 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1609 pixels <<= 16 * pixelShift;
1611 iwidth -= phrasesToSkip;
1613 pixCount = pixelShift;
1617 else if (depth == 5) // 24 BPP
1619 //I'm not sure that you can scale a 24 BPP bitmap properly--the JTRM seem to indicate as much.
1620 WriteLog("OP: Writing 24 BPP scaled bitmap!\n");
1622 WriteLog("OP: Scaled bitmap @ 24 BPP requesting FIRSTPIX!\n");
1623 // Not sure, but I think RMW only works with 16 BPP and below, and only in CRY mode...
1624 // The LSB is OPFLAG_REFLECT, so sign extend it and or 4 into it.
1625 int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 4) | 0x04;
1630 uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
1631 data += pitch << 3; // Multiply pitch * 8 (optimize: precompute this value)
1633 for(int i=0; i<2; i++)
1635 uint8 bits3 = pixels >> 56, bits2 = pixels >> 48,
1636 bits1 = pixels >> 40, bits0 = pixels >> 32;
1638 if (flagTRANS && (bits3 | bits2 | bits1 | bits0) == 0)
1641 *currentLineBuffer = bits3,
1642 *(currentLineBuffer + 1) = bits2,
1643 *(currentLineBuffer + 2) = bits1,
1644 *(currentLineBuffer + 3) = bits0;
1646 currentLineBuffer += lbufDelta;