//
// Object Processor
//
-// by cal2
+// Original source by Cal2
// GCC/SDL port by Niels Wagenaar (Linux/WIN32) and Caz (BeOS)
-// Cleanups/fixes/rewrites by James L. Hammons
+// Extensive cleanups/fixes/rewrites by James L. Hammons
//
#include <stdio.h>
// Private function prototypes
-void OPProcessFixedBitmap(int scanline, uint64 p0, uint64 p1, bool render);
-void OPProcessScaledBitmap(int scanline, uint64 p0, uint64 p1, uint64 p2, bool render);
+void OPProcessFixedBitmap(uint64 p0, uint64 p1, bool render);
+void OPProcessScaledBitmap(uint64 p0, uint64 p1, uint64 p2, bool render);
void DumpScaledObject(uint64 p0, uint64 p1, uint64 p2);
void DumpFixedObject(uint64 p0, uint64 p1);
uint64 op_load_phrase(uint32 offset);
-// External global variables
-
-extern uint32 jaguar_mainRom_crc32;
-
// Local global variables
static uint8 * op_blend_y;
// some of the regular TOM RAM...
static uint8 objectp_ram[0x40]; // This is based at $F00000
uint8 objectp_running;
-bool objectp_stop_reading_list;
+//bool objectp_stop_reading_list;
static uint8 op_bitmap_bit_depth[8] = { 1, 2, 4, 8, 16, 24, 32, 0 };
//static uint32 op_bitmap_bit_size[8] =
// Object Processor memory access
// Memory range: F00010 - F00027
//
+// F00010-F00017 R xxxxxxxx xxxxxxxx OB - current object code from the graphics processor
+// F00020-F00023 W xxxxxxxx xxxxxxxx OLP - start of the object list
+// F00026 W -------- -------x OBF - object processor flag
+//
+
uint8 OPReadByte(uint32 offset, uint32 who/*=UNKNOWN*/)
{
offset &= 0x3F;
return GET16(objectp_ram, offset);
}
-// F00010-F00017 R xxxxxxxx xxxxxxxx OB - current object code from the graphics processor
-// F00020-F00023 W xxxxxxxx xxxxxxxx OLP - start of the object list
-// F00026 W -------- -------x OBF - object processor flag
-
void OPWriteByte(uint32 offset, uint8 data, uint32 who/*=UNKNOWN*/)
{
offset &= 0x3F;
//
// Object Processor main routine
//
+//Need to fix this so that when an GPU object IRQ happens, we can pick up OP processing
+//where we left off. !!! FIX !!!
void OPProcessList(int scanline, bool render)
{
extern int op_start_log;
op_pointer = op_get_list_pointer();
- objectp_stop_reading_list = false;
+// objectp_stop_reading_list = false;
// *** BEGIN OP PROCESSOR TESTING ONLY ***
extern bool interactiveMode;
else
inhibit = false;
// *** END OP PROCESSOR TESTING ONLY ***
- if (objectp_stop_reading_list)
- return;
+// if (objectp_stop_reading_list)
+// return;
uint64 p0 = op_load_phrase(op_pointer);
op_pointer += 8;
-if (scanline == tom_get_vdb() && op_start_log)
+if (scanline == tom_get_vdb() + 1 && op_start_log)
//if (scanline == 215 && op_start_log)
{
WriteLog("%08X --> phrase %08X %08X", op_pointer - 8, (int)(p0>>32), (int)(p0&0xFFFFFFFF));
{
case OBJECT_TYPE_BITMAP:
{
- // Would *not* be /2 if interlaced...!
- uint16 ypos = ((p0 >> 3) & 0x3FF) / 2;
+ uint16 ypos = (p0 >> 3) & 0x3FF;
// This is only theory implied by Rayman...!
// It seems that if the YPOS is zero, then bump the YPOS value so that it coincides with
// the VDB value. With interlacing, this would be slightly more tricky.
op_pointer += 8;
//WriteLog("OP: Writing scanline %d with ypos == %d...\n", scanline, ypos);
//WriteLog("--> Writing %u BPP bitmap...\n", op_bitmap_bit_depth[(p1 >> 12) & 0x07]);
- OPProcessFixedBitmap(scanline, p0, p1, render);
+// OPProcessFixedBitmap(scanline, p0, p1, render);
+ OPProcessFixedBitmap(p0, p1, render);
// OP write-backs
//???Does this really happen??? Doesn't seem to work if you do this...!
+//Probably not. Must be a bug in the documentation...!
// uint32 link = (p0 & 0x7FFFF000000) >> 21;
// SET16(objectp_ram, 0x20, link & 0xFFFF); // OLP
// SET16(objectp_ram, 0x22, link >> 16);
}
case OBJECT_TYPE_SCALE:
{
- // Would *not* be /2 if interlaced...!
- uint16 ypos = ((p0 >> 3) & 0x3FF) / 2;
-// This is only theory implied by Rayman...!
-// It seems that if the YPOS is zero, then bump the YPOS value so that it coincides with
-// the VDB value. With interlacing, this would be slightly more tricky.
-// There's probably another bit somewhere that enables this mode--but so far, doesn't seem
-// to affect any other game in a negative way (that I've seen).
-// Either that, or it's an undocumented bug...
-
-//No, the reason this was needed is that the OP code before was wrong. Any value
-//less than VDB will get written to the top line of the display!
-// if (ypos == 0)
-// ypos = TOMReadWord(0xF00046, OP) / 2; // Get the VDB value
+ uint16 ypos = (p0 >> 3) & 0x3FF;
uint32 height = (p0 & 0xFFC000) >> 14;
uint32 oldOPP = op_pointer - 8;
// *** BEGIN OP PROCESSOR TESTING ONLY ***
uint64 p2 = op_load_phrase(op_pointer);
op_pointer += 8;
//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));
- OPProcessScaledBitmap(scanline, p0, p1, p2, render);
+ OPProcessScaledBitmap(p0, p1, p2, render);
// OP write-backs
-//???Does this really happen??? Doesn't seem to work if you do this...!
-// uint32 link = (p0 & 0x7FFFF000000) >> 21;
-// SET16(objectp_ram, 0x20, link & 0xFFFF); // OLP
-// SET16(objectp_ram, 0x22, link >> 16);
-/* uint32 height = (p0 & 0xFFC000) >> 14;
- if (height - 1 > 0)
- height--;*/
- // NOTE: Would subtract 2 if in interlaced mode...!
-// uint64 height = ((p0 & 0xFFC000) - 0x4000) & 0xFFC000;
-
uint8 remainder = p2 >> 16, vscale = p2 >> 8;
//Actually, we should skip this object if it has a vscale of zero.
//Or do we? Not sure... Atari Karts has a few lines that look like:
vscale = 0x20; // OP bug??? Nope, it isn't...! Or is it?
remainder -= 0x20; // 1.0f in [3.5] fixed point format
- if (remainder & 0x80) // I.e., it's negative
+// if (remainder & 0x80) // I.e., it's negative
+ if ((remainder & 0x80) || remainder == 0) // I.e., it's <= 0
{
uint64 data = (p0 & 0xFFFFF80000000000) >> 40;
uint64 dwidth = (p1 & 0xFFC0000) >> 15;
- while (remainder & 0x80)
+// while (remainder & 0x80)
+ while ((remainder & 0x80) || remainder == 0)
{
remainder += vscale;
if (height)
//OPSuspendedByGPU = true;
//Dunno if the OP keeps processing from where it was interrupted, or if it just continues
//on the next scanline...
+// --> It continues from where it was interrupted! !!! FIX !!!
break;
}
case OBJECT_TYPE_BRANCH:
switch (cc)
{
case CONDITION_EQUAL:
-//Why do this for the equal case? If they wrote an odd YPOS, then it wouldn't be detected!
-// if (ypos != 0x7FF && (ypos & 0x01))
-// ypos ^= 0x01;
-// if ((2 * tom_get_scanline()) == ypos || ypos == 0x7FF)
-//Here we're using VC instead of the bogus tom_get_scanline() value...
if (TOMReadWord(0xF00006, OP) == ypos || ypos == 0x7FF)
op_pointer = link;
break;
case CONDITION_LESS_THAN:
-// if ((2 * tom_get_scanline()) < ypos)
if (TOMReadWord(0xF00006, OP) < ypos)
op_pointer = link;
break;
case CONDITION_GREATER_THAN:
-// if ((2 * tom_get_scanline()) > ypos)
if (TOMReadWord(0xF00006, OP) > ypos)
op_pointer = link;
break;
if (p0 & 0x08)
{
tom_set_pending_object_int();
- if (tom_irq_enabled(IRQ_OPFLAG) && jaguar_interrupt_handler_is_valid(64))
+ if (tom_irq_enabled(IRQ_OPFLAG))// && jaguar_interrupt_handler_is_valid(64))
m68k_set_irq(7); // Cause an NMI to occur...
}
//
// Store fixed size bitmap in line buffer
//
-
-// Interesting thing about Rayman: There seems to be a transparent bitmap (1/8/16 bpp--which?)
-// being rendered under his feet--doesn't align when walking... Check it out!
-
-void OPProcessFixedBitmap(int scanline, uint64 p0, uint64 p1, bool render)
+void OPProcessFixedBitmap(uint64 p0, uint64 p1, bool render)
{
// Need to make sure that when writing that it stays within the line buffer...
// LBUF ($F01800 - $F01D9E) 360 x 32-bit RAM
uint32 iwidth = (p1 >> 28) & 0x3FF; // Image width in *phrases*
uint32 data = (p0 >> 40) & 0xFFFFF8; // Pixel data address
//#ifdef OP_DEBUG_BMP
-// Prolly should use this... Though not sure exactly how.
uint32 firstPix = (p1 >> 49) & 0x3F;
// "The LSB is significant only for scaled objects..." -JTRM
// "In 1 BPP mode, all five bits are significant. In 2 BPP mode, the top four are significant..."
// rightMargin = lbufWidth;
*/
if (depth > 5)
- WriteLog("We're about to encounter a divide by zero error!\n");
+ WriteLog("OP: We're about to encounter a divide by zero error!\n");
// NOTE: We're just using endPos to figure out how much, if any, to clip by.
// ALSO: There may be another case where we start out of bounds and end out of bounds...!
// !!! FIX !!!
}
else if (depth == 3) // 8 BPP
{
-if (firstPix)
- WriteLog("OP: Fixed bitmap @ 8 BPP requesting FIRSTPIX! (fp=%u)\n", firstPix);
// The LSB is OPFLAG_REFLECT, so sign extend it and or 2 into it.
int32 lbufDelta = ((int8)((flags << 7) & 0xFF) >> 5) | 0x02;
+ // Fetch 1st phrase...
+ uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
+//Note that firstPix should only be honored *if* we start with the 1st phrase of the bitmap
+//i.e., we didn't clip on the margin... !!! FIX !!!
+ firstPix &= 0x30; // Only top two bits are valid for 8 BPP
+ pixels <<= firstPix; // Skip first N pixels (N=firstPix)...
+ int i = firstPix >> 3; // Start counter at right spot...
+
while (iwidth--)
{
- // Fetch phrase...
- uint64 pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
- data += pitch;
-
- for(int i=0; i<8; i++)
+ while (i++ < 8)
{
uint8 bits = pixels >> 56;
// Seems to me that both of these are in the same endian, so we could cast it as
currentLineBuffer += lbufDelta;
pixels <<= 8;
}
+ i = 0;
+ // Fetch next phrase...
+ data += pitch;
+ pixels = ((uint64)JaguarReadLong(data, OP) << 32) | JaguarReadLong(data + 4, OP);
}
}
else if (depth == 4) // 16 BPP
//
// Store scaled bitmap in line buffer
//
-void OPProcessScaledBitmap(int scanline, uint64 p0, uint64 p1, uint64 p2, bool render)
+void OPProcessScaledBitmap(uint64 p0, uint64 p1, uint64 p2, bool render)
{
// Need to make sure that when writing that it stays within the line buffer...
// LBUF ($F01800 - $F01D9E) 360 x 32-bit RAM
uint8 index = (p1 >> 37) & 0xFE; // CLUT index offset (upper pix, 1-4 bpp)
uint32 pitch = (p1 >> 15) & 0x07; // Phrase pitch
-// int16 scanlineWidth = tom_getVideoModeWidth();
uint8 * tom_ram_8 = tom_get_ram_pointer();
uint8 * paletteRAM = &tom_ram_8[0x400];
// This is OK as long as it's used correctly: For 16-bit RAM to RAM direct copies--NOT
- // for use when using endian-corrected data (i.e., any of the *_word_read functions!)
+ // for use when using endian-corrected data (i.e., any of the *ReadWord functions!)
uint16 * paletteRAM16 = (uint16 *)paletteRAM;
uint8 hscale = p2 & 0xFF;
- uint8 horizontalRemainder = hscale; // Not sure if it starts full, but seems reasonable
+// uint8 horizontalRemainder = hscale; // Not sure if it starts full, but seems reasonable [It's not!]
+ uint8 horizontalRemainder = 0; // Let's try zero! Seems to work! Yay!
int32 scaledWidthInPixels = (iwidth * phraseWidthToPixels[depth] * hscale) >> 5;
uint32 scaledPhrasePixels = (phraseWidthToPixels[depth] * hscale) >> 5;
// WriteLog("bitmap %ix? %ibpp at %i,? firstpix=? data=0x%.8x pitch %i hflipped=%s dwidth=? (linked to ?) RMW=%s Tranparent=%s\n",
// iwidth, op_bitmap_bit_depth[bitdepth], xpos, ptr, pitch, (flags&OPFLAG_REFLECT ? "yes" : "no"), (flags&OPFLAG_RMW ? "yes" : "no"), (flags&OPFLAG_TRANS ? "yes" : "no"));
-//Looks like an hscale of zero means don't draw!
+// Looks like an hscale of zero means don't draw!
if (!render || iwidth == 0 || hscale == 0)
return;
projects / virtualjaguar / commitdiff