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aligned aux buffer correctly (maybe)

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dborca
2004-09-27 09:05:22 +00:00
parent 4bb204b929
commit ada722548b
1 changed files with 71 additions and 1 deletions
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72
glide3x/h3/minihwc/minihwc.c
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@@ -19,6 +19,13 @@
**
** $Header$
** $Log$
** Revision 1.1.1.1.6.4 2004/03/02 07:30:58 dborca
** changed the build process to make the branches independent
** made glide.h consistent across all branches
** grQueryResolution now works in DOS
** more tests in CVG branch
** some other fixes
**
** Revision 1.1.1.1.6.3 2003/11/07 13:38:39 dborca
** unite the clans
**
@@ -3624,7 +3631,7 @@ hwcBufferLfbAddr(FxU32 bufNum,
FxBool colBufAlignP)
{
FxU32 retVal = 0x00UL;
#if 0
if (bInfo->vidInfo.tiled) {
retVal = (bInfo->fbOffset +
pow2Round(bufNum * bInfo->vidInfo.yRes * HWC_TILED_BUFFER_BYTES,
@@ -3635,7 +3642,70 @@ hwcBufferLfbAddr(FxU32 bufNum,
} else if (bufNum == bInfo->buffInfo.nColBuffers) {
retVal = bInfo->buffInfo.auxBuffStart;
}
#else
/* [dBorca] Hack alert:
* the code above gives bad AUX buffer
* for 320x200, 320x240, 400x300, 640x400
* My Voodoo3 agrees with the code below.
* Always!
*/
FxU32 tileAddress;
FxU32 tileNumber;
FxU32 tileOffset;
FxU32 tileXOffset;
FxU32 tileScanline;
FxU32 tileRow;
FxU32 lfbAddress;
FxU32 lfbYOffset;
FxU32 physAddress;
if (bufNum < bInfo->buffInfo.nColBuffers) {
physAddress = bInfo->buffInfo.colBuffStart[bufNum];
} else if (bufNum == bInfo->buffInfo.nColBuffers) {
physAddress = bInfo->buffInfo.auxBuffStart;
} else {
/*GR_ASSERT(bufNum <= bInfo->buffInfo.nColBuffers);*/
}
if (bInfo->vidInfo.tiled) {
GDBG_INFO(80, "\tphysAddress: 0x%08lx\n",physAddress);
/* Compute address in tile space */
tileAddress = physAddress - bInfo->fbOffset;
GDBG_INFO(80, "\ttileAddress: 0x%08lx\n",tileAddress);
/* Compute tile number we're in (each tile is 4K bytes) */
tileNumber = tileAddress >> 12;
GDBG_INFO(80, "\ttileNumber: 0x%08lx (%d)\n",tileNumber,tileNumber);
/* Compute base tile row we're in */
tileRow = tileNumber / bInfo->buffInfo.bufStrideInTiles;
GDBG_INFO(80, "\ttileRow: %d (stride = %d)\n",tileNumber,bInfo->buffInfo.bufStrideInTiles);
/* Compute offset within the tile */
tileOffset = tileAddress - (tileNumber << 12);
GDBG_INFO(80, "\ttileOffset: 0x%08lx\n",tileOffset);
/* Compute scanline within the tile */
tileScanline = tileOffset >> 7;
GDBG_INFO(80, "\ttileScanline: 0x%08lx\n",tileScanline);
/* Compute tile X offset within the row */
tileXOffset = tileNumber - (tileRow * bInfo->buffInfo.bufStrideInTiles);
GDBG_INFO(80, "\ttileXOffset: %d\n",tileXOffset);
/* Compute Y offset in LFB space */
lfbYOffset = tileRow * 32 + tileScanline;
/* Compute LFB address of tile start */
lfbAddress = bInfo->fbOffset + lfbYOffset * LFBSTRIDE + tileXOffset * 128;
GDBG_INFO(80, "\tlfbAddress: %08lx\n", lfbAddress);
retVal = lfbAddress;
} else {
retVal = physAddress;
}
#endif
return retVal;
}