1802 lines
54 KiB
C
1802 lines
54 KiB
C
/*
|
|
** Copyright 1991, 1992, 1993, Silicon Graphics, Inc.
|
|
** All Rights Reserved.
|
|
**
|
|
** This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics, Inc.;
|
|
** the contents of this file may not be disclosed to third parties, copied or
|
|
** duplicated in any form, in whole or in part, without the prior written
|
|
** permission of Silicon Graphics, Inc.
|
|
**
|
|
** RESTRICTED RIGHTS LEGEND:
|
|
** Use, duplication or disclosure by the Government is subject to restrictions
|
|
** as set forth in subdivision (c)(1)(ii) of the Rights in Technical Data
|
|
** and Computer Software clause at DFARS 252.227-7013, and/or in similar or
|
|
** successor clauses in the FAR, DOD or NASA FAR Supplement. Unpublished -
|
|
** rights reserved under the Copyright Laws of the United States.
|
|
*/
|
|
|
|
#include "precomp.h"
|
|
#pragma hdrstop
|
|
|
|
#ifdef _MCD_
|
|
|
|
void FASTCALL GenMcdClearDepthNOP(__GLdepthBuffer *dfb);
|
|
|
|
/******************************Public*Routine******************************\
|
|
* GenMcdReadZSpan
|
|
*
|
|
* Read specified span (starting from (x,y) and cx pels wide) of the depth
|
|
* buffer. The read span is in the pMcdSurf->pDepthSpan buffer.
|
|
*
|
|
* Returns:
|
|
* First depth value in the span.
|
|
*
|
|
* History:
|
|
* 15-Feb-1996 -by- Gilman Wong [gilmanw]
|
|
* Adpated from gendepth.c (3dddi).
|
|
\**************************************************************************/
|
|
|
|
__GLzValue GenMcdReadZSpan(__GLdepthBuffer *fb, GLint x, GLint y, GLint cx)
|
|
{
|
|
GENMCDSTATE *pMcdState;
|
|
GENMCDSURFACE *pMcdSurf;
|
|
LONG i;
|
|
ULONG *pDest;
|
|
ULONG shiftVal;
|
|
ULONG maskVal;
|
|
|
|
pMcdState = ((__GLGENcontext *)fb->buf.gc)->pMcdState;
|
|
ASSERTOPENGL(pMcdState, "GenMcdReadZSpan: null pMcdState\n");
|
|
|
|
pMcdSurf = pMcdState->pMcdSurf;
|
|
ASSERTOPENGL(pMcdSurf, "GenMcdReadZSpan: null pMcdSurf\n");
|
|
|
|
// Read MCD depth span.
|
|
|
|
if ( !(gpMcdTable->pMCDReadSpan)(&pMcdState->McdContext,
|
|
pMcdSurf->McdDepthBuf.pv,
|
|
__GL_UNBIAS_X(fb->buf.gc, x),
|
|
__GL_UNBIAS_Y(fb->buf.gc, y),
|
|
cx, MCDSPAN_DEPTH) )
|
|
{
|
|
WARNING("GenMcdReadZSpan: MCDReadSpan failed\n");
|
|
}
|
|
|
|
// Shift and mask depth values so that they are in the most significant
|
|
// bits of the __GLzValue.
|
|
//
|
|
// If MCD has a 16-bit depth buffer, then we utilize a separate translation
|
|
// buffer (pDepthSpan). If MCD has a 32-bit depth buffer (implying that
|
|
// pDepthSpan == McdDepthBuf.pv), then we do this in place.
|
|
|
|
pDest = (ULONG *) pMcdState->pDepthSpan;
|
|
shiftVal = pMcdState->McdPixelFmt.cDepthShift;
|
|
maskVal = pMcdSurf->depthBitMask;
|
|
|
|
if ( pDest == (ULONG *) pMcdSurf->McdDepthBuf.pv )
|
|
{
|
|
for (i = cx; i; i--, pDest++)
|
|
*pDest = (*pDest << shiftVal) & maskVal;
|
|
}
|
|
else
|
|
{
|
|
USHORT *pSrc = (USHORT *) pMcdSurf->McdDepthBuf.pv;
|
|
|
|
for (i = cx; i; i--)
|
|
*pDest++ = ((ULONG)*pSrc++ << shiftVal) & maskVal;
|
|
}
|
|
|
|
return (*((__GLzValue *)pMcdState->pDepthSpan));
|
|
}
|
|
|
|
/******************************Public*Routine******************************\
|
|
* GenMcdWriteZSpan
|
|
*
|
|
* Write depth span buffer to the specificed span (starting from (x,y) and
|
|
* cx pels wide) of the MCD depth buffer. The span to be written is in
|
|
* pMcdSurf->pDepthSpan.
|
|
*
|
|
* History:
|
|
* 15-Feb-1996 -by- Gilman Wong [gilmanw]
|
|
* Adpated from gendepth.c (3dddi).
|
|
\**************************************************************************/
|
|
|
|
void GenMcdWriteZSpan(__GLdepthBuffer *fb, GLint x, GLint y, GLint cx)
|
|
{
|
|
GENMCDSTATE *pMcdState;
|
|
GENMCDSURFACE *pMcdSurf;
|
|
LONG i;
|
|
ULONG *pSrc;
|
|
ULONG shiftVal;
|
|
|
|
pMcdState = ((__GLGENcontext *)fb->buf.gc)->pMcdState;
|
|
ASSERTOPENGL(pMcdState, "GenMcdWriteZSpan: null pMcdState\n");
|
|
|
|
pMcdSurf = pMcdState->pMcdSurf;
|
|
ASSERTOPENGL(pMcdSurf, "GenMcdWriteZSpan: null pMcdSurf\n");
|
|
|
|
// Depth span buffer values are shifted into the most significant portion
|
|
// of the __GLzValue. We need to shift these values back into position.
|
|
//
|
|
// Furthermore, the depth span buffer is always 32-bit. If the MCD depth
|
|
// buffer is also 32-bit (implying that pDepthSpan == McdDepthBuf.pv),
|
|
// then we can shift in place.
|
|
|
|
pSrc = (ULONG *) pMcdState->pDepthSpan;
|
|
shiftVal = pMcdState->McdPixelFmt.cDepthShift;
|
|
|
|
if ( pSrc == (ULONG *) pMcdSurf->McdDepthBuf.pv )
|
|
{
|
|
for (i = cx; i; i--, pSrc++)
|
|
*pSrc >>= shiftVal;
|
|
}
|
|
else
|
|
{
|
|
USHORT *pDest = (USHORT *) pMcdSurf->McdDepthBuf.pv;
|
|
|
|
for (i = cx; i; i--)
|
|
*pDest++ = (USHORT)(*pSrc++ >> shiftVal);
|
|
}
|
|
|
|
// Write MCD depth span.
|
|
|
|
if ( !(gpMcdTable->pMCDWriteSpan)(&pMcdState->McdContext,
|
|
pMcdSurf->McdDepthBuf.pv,
|
|
__GL_UNBIAS_X(fb->buf.gc, x),
|
|
__GL_UNBIAS_Y(fb->buf.gc, y),
|
|
cx, MCDSPAN_DEPTH) )
|
|
{
|
|
WARNING("GenMcdWriteZSpan: MCDWriteSpan failed\n");
|
|
}
|
|
}
|
|
|
|
/******************************Public*Routine******************************\
|
|
* GenMcdWriteZ
|
|
*
|
|
* Write a single depth value to the specificed location.
|
|
*
|
|
* History:
|
|
* 15-Feb-1996 -by- Gilman Wong [gilmanw]
|
|
* Adpated from gendepth.c (3dddi).
|
|
\**************************************************************************/
|
|
|
|
void GenMcdWriteZ(__GLdepthBuffer *fb, GLint x, GLint y, __GLzValue z)
|
|
{
|
|
GENMCDSTATE *pMcdState;
|
|
GENMCDSURFACE *pMcdSurf;
|
|
|
|
pMcdState = ((__GLGENcontext *)fb->buf.gc)->pMcdState;
|
|
ASSERTOPENGL(pMcdState, "GenMcdWriteZ: null pMcdState\n");
|
|
|
|
pMcdSurf = pMcdState->pMcdSurf;
|
|
ASSERTOPENGL(pMcdSurf, "GenMcdWriteZ: null pMcdSurf\n");
|
|
|
|
// If (pmcd->pDepthSpan == pmcd->McdDepthBuf.pv) then MCD has a 32-bit
|
|
// depth buffer; otherwise, 16-bit.
|
|
|
|
if ( pMcdSurf->McdDepthBuf.pv == (PVOID) pMcdState->pDepthSpan )
|
|
*((ULONG *)pMcdSurf->McdDepthBuf.pv) = (ULONG)z >> pMcdState->McdPixelFmt.cDepthShift;
|
|
else
|
|
*((USHORT *)pMcdSurf->McdDepthBuf.pv) = (USHORT)(z >> pMcdState->McdPixelFmt.cDepthShift);
|
|
|
|
// Write depth value to MCD.
|
|
|
|
if ( !(gpMcdTable->pMCDWriteSpan)(&pMcdState->McdContext,
|
|
pMcdSurf->McdDepthBuf.pv,
|
|
__GL_UNBIAS_X(fb->buf.gc, x),
|
|
__GL_UNBIAS_Y(fb->buf.gc, y),
|
|
1, MCDSPAN_DEPTH) )
|
|
{
|
|
WARNING("GenMcdWriteZ: MCDWriteSpan failed\n");
|
|
}
|
|
}
|
|
|
|
/******************************Public*Routine******************************\
|
|
* GenMcdReadZRawSpan
|
|
*
|
|
* Unlike GenMcdReadZSpan, which reads the span from the MCD drivers into
|
|
* the 32-bit z span buffer, GenMcdReadZRawSpan reads the span in its
|
|
* native format and leaves it in the pMcdSurf->McdDepthBuf.pv buffer.
|
|
*
|
|
* History:
|
|
* 14-Mar-1996 -by- Gilman Wong [gilmanw]
|
|
* Wrote it.
|
|
\**************************************************************************/
|
|
|
|
PVOID FASTCALL
|
|
GenMcdReadZRawSpan(__GLdepthBuffer *fb, GLint x, GLint y, GLint cx)
|
|
{
|
|
GENMCDSTATE *pMcdState;
|
|
GENMCDSURFACE *pMcdSurf;
|
|
|
|
#if DBG
|
|
if (cx > fb->buf.gc->constants.width)
|
|
WARNING2("GenMcdReadZRawSpan: cx (%ld) bigger than window width (%ld)\n", cx, fb->buf.gc->constants.width);
|
|
ASSERTOPENGL(cx <= MCD_MAX_SCANLINE, "GenMcdReadZRawSpan: cx exceeds buffer width\n");
|
|
#endif
|
|
|
|
pMcdState = ((__GLGENcontext *)fb->buf.gc)->pMcdState;
|
|
pMcdSurf = pMcdState->pMcdSurf;
|
|
|
|
// Read MCD depth span.
|
|
|
|
if ( !(gpMcdTable->pMCDReadSpan)(&pMcdState->McdContext,
|
|
pMcdSurf->McdDepthBuf.pv,
|
|
__GL_UNBIAS_X(fb->buf.gc, x),
|
|
__GL_UNBIAS_Y(fb->buf.gc, y),
|
|
cx, MCDSPAN_DEPTH) )
|
|
{
|
|
WARNING("GenMcdReadZRawSpan: MCDReadSpan failed\n");
|
|
}
|
|
|
|
return (pMcdSurf->McdDepthBuf.pv);
|
|
}
|
|
|
|
/******************************Public*Routine******************************\
|
|
* GenMcdWriteZRawSpan
|
|
*
|
|
* Unlike GenMcdWriteZSpan, which writes the span in the 32-bit z span
|
|
* buffer to the MCD driver, GenMcdWriteZRawSpan writes the native format
|
|
* span in the pMcdSurf->McdDepthBuf.pv buffer to the driver.
|
|
*
|
|
* History:
|
|
* 14-Mar-1996 -by- Gilman Wong [gilmanw]
|
|
* Wrote it.
|
|
\**************************************************************************/
|
|
|
|
void FASTCALL
|
|
GenMcdWriteZRawSpan(__GLdepthBuffer *fb, GLint x, GLint y, GLint cx)
|
|
{
|
|
GENMCDSTATE *pMcdState;
|
|
GENMCDSURFACE *pMcdSurf;
|
|
|
|
#if DBG
|
|
if (cx > fb->buf.gc->constants.width)
|
|
WARNING2("GenMcdWriteZRawSpan: cx (%ld) bigger than window width (%ld)\n", cx, fb->buf.gc->constants.width);
|
|
ASSERTOPENGL(cx <= MCD_MAX_SCANLINE, "GenMcdWriteZRawSpan: cx exceeds buffer width\n");
|
|
#endif
|
|
|
|
pMcdState = ((__GLGENcontext *)fb->buf.gc)->pMcdState;
|
|
pMcdSurf = pMcdState->pMcdSurf;
|
|
|
|
// Write MCD depth span.
|
|
|
|
if ( !(gpMcdTable->pMCDWriteSpan)(&pMcdState->McdContext,
|
|
pMcdSurf->McdDepthBuf.pv,
|
|
__GL_UNBIAS_X(fb->buf.gc, x),
|
|
__GL_UNBIAS_Y(fb->buf.gc, y),
|
|
cx, MCDSPAN_DEPTH) )
|
|
{
|
|
WARNING("GenMcdWriteZRawSpan: MCDWriteSpan failed\n");
|
|
}
|
|
}
|
|
|
|
|
|
/************************************************************************/
|
|
/* Fetch routines */
|
|
|
|
__GLzValue FASTCALL McdFetch(__GLdepthBuffer *fb, GLint x, GLint y)
|
|
{
|
|
return GenMcdReadZSpan(fb, x, y, 1);
|
|
}
|
|
|
|
__GLzValue FASTCALL McdFetch16(__GLdepthBuffer *fb, GLint x, GLint y)
|
|
{
|
|
return (GenMcdReadZSpan(fb, x, y, 1) >> 16);
|
|
}
|
|
|
|
__GLzValue FASTCALL McdFetchNEVER(__GLdepthBuffer *fb, GLint x, GLint y)
|
|
{
|
|
return (__GLzValue) 0;
|
|
}
|
|
|
|
|
|
/************************************************************************/
|
|
/* 32-bit depth buffer store routines, depth write is enabled. */
|
|
/* */
|
|
/* Note: McdStoreNEVER is usable for 16- and 32-bit, write enabled or */
|
|
/* not. */
|
|
|
|
GLboolean McdStoreNEVER(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
return GL_FALSE;
|
|
}
|
|
|
|
GLboolean McdStoreLESS(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
if ((z & fb->writeMask) < GenMcdReadZSpan(fb, x, y, 1)) {
|
|
GenMcdWriteZ(fb, x, y, z);
|
|
return GL_TRUE;
|
|
}
|
|
return GL_FALSE;
|
|
}
|
|
|
|
GLboolean McdStoreEQUAL(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
if ((z & fb->writeMask) == GenMcdReadZSpan(fb, x, y, 1)) {
|
|
GenMcdWriteZ(fb, x, y, z);
|
|
return GL_TRUE;
|
|
}
|
|
return GL_FALSE;
|
|
}
|
|
|
|
GLboolean McdStoreLEQUAL(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
if ((z & fb->writeMask) <= GenMcdReadZSpan(fb, x, y, 1)) {
|
|
GenMcdWriteZ(fb, x, y, z);
|
|
return GL_TRUE;
|
|
}
|
|
return GL_FALSE;
|
|
}
|
|
|
|
GLboolean McdStoreGREATER(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
if ((z & fb->writeMask) > GenMcdReadZSpan(fb, x, y, 1)) {
|
|
GenMcdWriteZ(fb, x, y, z);
|
|
return GL_TRUE;
|
|
}
|
|
return GL_FALSE;
|
|
}
|
|
|
|
GLboolean McdStoreNOTEQUAL(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
if ((z & fb->writeMask) != GenMcdReadZSpan(fb, x, y, 1)) {
|
|
GenMcdWriteZ(fb, x, y, z);
|
|
return GL_TRUE;
|
|
}
|
|
return GL_FALSE;
|
|
}
|
|
|
|
GLboolean McdStoreGEQUAL(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
if ((z & fb->writeMask) >= GenMcdReadZSpan(fb, x, y, 1)) {
|
|
GenMcdWriteZ(fb, x, y, z);
|
|
return GL_TRUE;
|
|
}
|
|
return GL_FALSE;
|
|
}
|
|
|
|
GLboolean McdStoreALWAYS(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
GenMcdWriteZ(fb, x, y, z);
|
|
return GL_TRUE;
|
|
}
|
|
|
|
|
|
/************************************************************************/
|
|
/* 32-bit depth buffer store routines, depth write not enabled. */
|
|
/* */
|
|
/* Note: McdStoreALWAYS_W usable for both 16- and 32-bit. */
|
|
|
|
GLboolean McdStoreLESS_W(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
return (z & fb->writeMask) < GenMcdReadZSpan(fb, x, y, 1);
|
|
}
|
|
|
|
GLboolean McdStoreEQUAL_W(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
return (z & fb->writeMask) == GenMcdReadZSpan(fb, x, y, 1);
|
|
}
|
|
|
|
GLboolean McdStoreLEQUAL_W(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
return (z & fb->writeMask) <= GenMcdReadZSpan(fb, x, y, 1);
|
|
}
|
|
|
|
GLboolean McdStoreGREATER_W(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
return (z & fb->writeMask) > GenMcdReadZSpan(fb, x, y, 1);
|
|
}
|
|
|
|
GLboolean McdStoreNOTEQUAL_W(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
return (z & fb->writeMask) != GenMcdReadZSpan(fb, x, y, 1);
|
|
}
|
|
|
|
GLboolean McdStoreGEQUAL_W(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
return (z & fb->writeMask) >= GenMcdReadZSpan(fb, x, y, 1);
|
|
}
|
|
|
|
GLboolean McdStoreALWAYS_W(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
return GL_TRUE;
|
|
}
|
|
|
|
|
|
/************************************************************************/
|
|
/* 16-bit depth buffer store routines, depth write enabled. */
|
|
|
|
GLboolean McdStore16LESS(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
z <<= 16;
|
|
if ((z & fb->writeMask) < GenMcdReadZSpan(fb, x, y, 1)) {
|
|
GenMcdWriteZ(fb, x, y, z);
|
|
return GL_TRUE;
|
|
}
|
|
return GL_FALSE;
|
|
}
|
|
|
|
GLboolean McdStore16EQUAL(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
z <<= 16;
|
|
if ((z & fb->writeMask) == GenMcdReadZSpan(fb, x, y, 1)) {
|
|
GenMcdWriteZ(fb, x, y, z);
|
|
return GL_TRUE;
|
|
}
|
|
return GL_FALSE;
|
|
}
|
|
|
|
GLboolean McdStore16LEQUAL(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
z <<= 16;
|
|
if ((z & fb->writeMask) <= GenMcdReadZSpan(fb, x, y, 1)) {
|
|
GenMcdWriteZ(fb, x, y, z);
|
|
return GL_TRUE;
|
|
}
|
|
return GL_FALSE;
|
|
}
|
|
|
|
GLboolean McdStore16GREATER(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
z <<= 16;
|
|
if ((z & fb->writeMask) > GenMcdReadZSpan(fb, x, y, 1)) {
|
|
GenMcdWriteZ(fb, x, y, z);
|
|
return GL_TRUE;
|
|
}
|
|
return GL_FALSE;
|
|
}
|
|
|
|
GLboolean McdStore16NOTEQUAL(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
z <<= 16;
|
|
if ((z & fb->writeMask) != GenMcdReadZSpan(fb, x, y, 1)) {
|
|
GenMcdWriteZ(fb, x, y, z);
|
|
return GL_TRUE;
|
|
}
|
|
return GL_FALSE;
|
|
}
|
|
|
|
GLboolean McdStore16GEQUAL(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
z <<= 16;
|
|
if ((z & fb->writeMask) >= GenMcdReadZSpan(fb, x, y, 1)) {
|
|
GenMcdWriteZ(fb, x, y, z);
|
|
return GL_TRUE;
|
|
}
|
|
return GL_FALSE;
|
|
}
|
|
|
|
GLboolean McdStore16ALWAYS(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
z <<= 16;
|
|
GenMcdWriteZ(fb, x, y, z);
|
|
return GL_TRUE;
|
|
}
|
|
|
|
|
|
/************************************************************************/
|
|
/* 16-bit depth buffer store routines, depth write not enabled. */
|
|
|
|
GLboolean McdStore16LESS_W(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
z <<= 16;
|
|
return (z & fb->writeMask) < GenMcdReadZSpan(fb, x, y, 1);
|
|
}
|
|
|
|
GLboolean McdStore16EQUAL_W(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
z <<= 16;
|
|
return (z & fb->writeMask) == GenMcdReadZSpan(fb, x, y, 1);
|
|
}
|
|
|
|
GLboolean McdStore16LEQUAL_W(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
z <<= 16;
|
|
return (z & fb->writeMask) <= GenMcdReadZSpan(fb, x, y, 1);
|
|
}
|
|
|
|
GLboolean McdStore16GREATER_W(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
z <<= 16;
|
|
return (z & fb->writeMask) > GenMcdReadZSpan(fb, x, y, 1);
|
|
}
|
|
|
|
GLboolean McdStore16NOTEQUAL_W(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
z <<= 16;
|
|
return (z & fb->writeMask) != GenMcdReadZSpan(fb, x, y, 1);
|
|
}
|
|
|
|
GLboolean McdStore16GEQUAL_W(__GLdepthBuffer *fb,
|
|
GLint x, GLint y, __GLzValue z)
|
|
{
|
|
z <<= 16;
|
|
return (z & fb->writeMask) >= GenMcdReadZSpan(fb, x, y, 1);
|
|
}
|
|
|
|
|
|
/************************************************************************/
|
|
/* Store proc table */
|
|
/* */
|
|
/* Functions are indexed by the depth function index (with offset of */
|
|
/* GL_NEVER removed). If depth write is not enabled, an additional */
|
|
/* offset of 8 must be added. If 16-bit depth, rather than 32-bit, */
|
|
/* an additional offset of 16 must be added. */
|
|
|
|
GLboolean (*McdStoreProcs[32])(__GLdepthBuffer*, GLint, GLint, __GLzValue)
|
|
= {
|
|
McdStoreNEVER, // 32-bit depth, write enabled
|
|
McdStoreLESS,
|
|
McdStoreEQUAL,
|
|
McdStoreLEQUAL,
|
|
McdStoreGREATER,
|
|
McdStoreNOTEQUAL,
|
|
McdStoreGEQUAL,
|
|
McdStoreALWAYS,
|
|
McdStoreNEVER, // 32-bit depth, write disabled
|
|
McdStoreLESS_W,
|
|
McdStoreEQUAL_W,
|
|
McdStoreLEQUAL_W,
|
|
McdStoreGREATER_W,
|
|
McdStoreNOTEQUAL_W,
|
|
McdStoreGEQUAL_W,
|
|
McdStoreALWAYS_W,
|
|
McdStoreNEVER, // 16-bit depth, write enabled
|
|
McdStore16LESS,
|
|
McdStore16EQUAL,
|
|
McdStore16LEQUAL,
|
|
McdStore16GREATER,
|
|
McdStore16NOTEQUAL,
|
|
McdStore16GEQUAL,
|
|
McdStore16ALWAYS,
|
|
McdStoreNEVER, // 16-bit depth, write disabled
|
|
McdStore16LESS_W,
|
|
McdStore16EQUAL_W,
|
|
McdStore16LEQUAL_W,
|
|
McdStore16GREATER_W,
|
|
McdStore16NOTEQUAL_W,
|
|
McdStore16GEQUAL_W,
|
|
McdStoreALWAYS_W
|
|
};
|
|
|
|
/******************************Public*Routine******************************\
|
|
* Pick
|
|
*
|
|
* Choose appropriate store proc for the MCD managed depth buffer.
|
|
*
|
|
* History:
|
|
* 15-Feb-1996 -by- Gilman Wong [gilmanw]
|
|
* Adpated from gendepth.c (3dddi).
|
|
\**************************************************************************/
|
|
|
|
// Note: depthIndex param not used - for compatibility with Pick in so_depth.c
|
|
void FASTCALL GenMcdPickDepth(__GLcontext *gc, __GLdepthBuffer *fb,
|
|
GLint depthIndex)
|
|
{
|
|
GLint ix;
|
|
|
|
ix = gc->state.depth.testFunc - GL_NEVER;
|
|
|
|
if (gc->modes.depthBits) {
|
|
if (!gc->state.depth.writeEnable) {
|
|
ix += 8;
|
|
}
|
|
if (gc->depthBuffer.buf.elementSize == 2) {
|
|
ix += 16;
|
|
}
|
|
} else {
|
|
|
|
// No depthBits so force McdStoreALWAYS_W.
|
|
|
|
ix = (GL_ALWAYS - GL_NEVER) + 8;
|
|
}
|
|
|
|
fb->store = McdStoreProcs[ix];
|
|
|
|
if (ix < 16)
|
|
fb->storeRaw = McdStoreProcs[ix];
|
|
else
|
|
fb->storeRaw = McdStoreProcs[ix-16];
|
|
}
|
|
|
|
/******************************Public*Routine******************************\
|
|
* __fastGenPickZStoreProc
|
|
*
|
|
\**************************************************************************/
|
|
|
|
void FASTCALL __fastGenPickZStoreProc(__GLcontext *gc)
|
|
{
|
|
int index;
|
|
|
|
index = gc->state.depth.testFunc - GL_NEVER;
|
|
|
|
if (gc->modes.depthBits) {
|
|
if (gc->state.depth.writeEnable == GL_FALSE)
|
|
index += 8;
|
|
|
|
if (gc->depthBuffer.buf.elementSize == 2)
|
|
index += 16;
|
|
} else {
|
|
index = (GL_ALWAYS - GL_NEVER) + 8;
|
|
}
|
|
|
|
#if DBG
|
|
{
|
|
GENMCDSTATE *pMcdState = ((__GLGENcontext *)gc)->pMcdState;
|
|
ASSERTOPENGL(!pMcdState || (pMcdState->McdBuffers.mcdDepthBuf.bufFlags & MCDBUF_ENABLED),
|
|
"__fastGenPickZStoreProc: bad state\n");
|
|
}
|
|
#endif
|
|
|
|
GENACCEL(gc).__fastGenZStore = __glCDTPixel[index];
|
|
}
|
|
|
|
/******************************Public*Routine******************************\
|
|
* GenMcdInitDepth
|
|
*
|
|
* Initialize __GLdepthBuffer for MCD.
|
|
*
|
|
* History:
|
|
* 15-Feb-1996 -by- Gilman Wong [gilmanw]
|
|
* Adpated from gendepth.c (3dddi).
|
|
\**************************************************************************/
|
|
|
|
void FASTCALL GenMcdInitDepth(__GLcontext *gc, __GLdepthBuffer *fb)
|
|
{
|
|
GENMCDSTATE *pMcdState;
|
|
ULONG zDepth;
|
|
|
|
pMcdState = ((__GLGENcontext *)gc)->pMcdState;
|
|
|
|
fb->buf.gc = gc;
|
|
fb->scale = (__GLzValue) ~0;
|
|
if (pMcdState)
|
|
fb->writeMask = ((__GLzValue)~0) << (32 - pMcdState->McdPixelFmt.cDepthBits);
|
|
else
|
|
fb->writeMask = 0;
|
|
fb->pick = GenMcdPickDepth;
|
|
|
|
if (gc->modes.depthBits) {
|
|
if (gc->modes.depthBits > 16)
|
|
{
|
|
fb->buf.elementSize = sizeof(__GLzValue);
|
|
fb->clear = GenMcdClearDepth32;
|
|
fb->store2 = McdStoreALWAYS;
|
|
fb->fetch = McdFetch;
|
|
} else {
|
|
fb->buf.elementSize = sizeof(__GLz16Value);
|
|
fb->clear = GenMcdClearDepth16;
|
|
fb->store2 = McdStore16ALWAYS;
|
|
fb->fetch = McdFetch16;
|
|
}
|
|
} else {
|
|
// If no depth buffer, depth test always passes (according to spec).
|
|
// However, writes must be masked. Also, I don't want to leave the
|
|
// clear function pointer unitialized (even though it should never
|
|
// be called) so use the NOP clear
|
|
|
|
fb->clear = GenMcdClearDepthNOP;
|
|
fb->store = McdStoreALWAYS_W;
|
|
fb->store2 = McdStoreALWAYS_W;
|
|
fb->fetch = McdFetchNEVER;
|
|
}
|
|
}
|
|
|
|
/******************************Public*Routine******************************\
|
|
* GenMcdFreeDepth
|
|
*
|
|
* Nothing to do. MCD driver manages its own resources.
|
|
\**************************************************************************/
|
|
|
|
void FASTCALL GenMcdFreeDepth(__GLcontext *gc, __GLdepthBuffer *fb)
|
|
{
|
|
}
|
|
|
|
/******************************Public*Routine******************************\
|
|
* GenMcdClearDepthNOP
|
|
*
|
|
* Nothing to do. This is used in the depthBits == 0 case.
|
|
\**************************************************************************/
|
|
|
|
void FASTCALL GenMcdClearDepthNOP(__GLdepthBuffer *dfb)
|
|
{
|
|
}
|
|
|
|
/******************************Public*Routine******************************\
|
|
* GenMcdClearDepth16
|
|
*
|
|
* MCD 16-bit depth buffer clear.
|
|
*
|
|
* History:
|
|
* 15-Feb-1996 -by- Gilman Wong [gilmanw]
|
|
* Wrote it.
|
|
\**************************************************************************/
|
|
|
|
void FASTCALL GenMcdClearDepth16(__GLdepthBuffer *dfb)
|
|
{
|
|
__GLGENcontext *gengc = (__GLGENcontext *) dfb->buf.gc;
|
|
GENMCDSTATE *pMcdState;
|
|
RECTL rcl;
|
|
GLint cWidthBytes;
|
|
USHORT usFillZ;
|
|
|
|
if (!gengc || !(pMcdState = gengc->pMcdState))
|
|
return;
|
|
|
|
// No clipping to handle. If MCDBUF_ENABLED is set there is
|
|
// no clipping to handle (see GenMcdUpdateBufferInfo in mcdcx.c).
|
|
// If MCDBUF_ENABLE is not set, then we use the MCD span call which
|
|
// will handle clipping for us.
|
|
//
|
|
// Therefore, the client rectangle from the WNDOBJ is the clear
|
|
// rectangle.
|
|
|
|
rcl = gengc->pwndLocked->rclClient;
|
|
cWidthBytes = (rcl.right - rcl.left) * sizeof(USHORT);
|
|
|
|
// Compute 16-bit z clear value.
|
|
|
|
usFillZ = (USHORT)(gengc->gc.state.depth.clear * gengc->genAccel.zDevScale);
|
|
|
|
// If MCDBUF_ENABLED, write directly into frame buffer memory.
|
|
|
|
if (pMcdState->McdBuffers.mcdDepthBuf.bufFlags & MCDBUF_ENABLED)
|
|
{
|
|
USHORT *pus, *pusEnd;
|
|
|
|
// Note: dfb->buf.base has a buffer origin offset of (0, 0).
|
|
|
|
pus = (USHORT *) dfb->buf.base;
|
|
pusEnd = pus + ((rcl.bottom - rcl.top) * dfb->buf.outerWidth);
|
|
|
|
ASSERTOPENGL((((ULONG_PTR)pus) & 0x01) == 0,
|
|
"GenMcdClearDepth16: depth buffer not WORD aligned\n");
|
|
|
|
for ( ; pus != pusEnd; pus += dfb->buf.outerWidth)
|
|
{
|
|
RtlFillMemoryUshort(pus, cWidthBytes, usFillZ);
|
|
}
|
|
}
|
|
|
|
// Otherwise, fill in one span's worth and write to MCD driver via
|
|
// MCDWriteSpan.
|
|
|
|
else
|
|
{
|
|
GLint y;
|
|
GLint cWidth = rcl.right - rcl.left;
|
|
GENMCDSURFACE *pMcdSurf;
|
|
|
|
pMcdSurf = pMcdState->pMcdSurf;
|
|
ASSERTOPENGL(pMcdSurf, "GenMcdClearDepth16: no MCD surface\n");
|
|
|
|
// Fill in one span into the shared memory buffer.
|
|
|
|
ASSERTOPENGL((((ULONG_PTR)pMcdSurf->McdDepthBuf.pv) & 0x01) == 0,
|
|
"GenMcdClearDepth16: depth span buffer not WORD aligned\n");
|
|
|
|
RtlFillMemoryUshort(pMcdSurf->McdDepthBuf.pv, cWidthBytes, usFillZ);
|
|
|
|
// Write the span for each span in the clear rectangle.
|
|
|
|
for (y = 0; y < (rcl.bottom - rcl.top); y++)
|
|
{
|
|
if ( !(gpMcdTable->pMCDWriteSpan)(&pMcdState->McdContext,
|
|
pMcdSurf->McdDepthBuf.pv,
|
|
//__GL_UNBIAS_X(dfb->buf.gc, 0),
|
|
//__GL_UNBIAS_Y(dfb->buf.gc, y),
|
|
0, y,
|
|
cWidth, MCDSPAN_DEPTH) )
|
|
{
|
|
WARNING("GenMcdClearDepth32: MCDWriteSpan failed\n");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/******************************Public*Routine******************************\
|
|
* GenMcdClearDepth32
|
|
*
|
|
* MCD 16-bit depth buffer clear.
|
|
*
|
|
* History:
|
|
* 15-Feb-1996 -by- Gilman Wong [gilmanw]
|
|
* Wrote it.
|
|
\**************************************************************************/
|
|
|
|
void FASTCALL GenMcdClearDepth32(__GLdepthBuffer *dfb)
|
|
{
|
|
__GLGENcontext *gengc = (__GLGENcontext *) dfb->buf.gc;
|
|
GENMCDSTATE *pMcdState;
|
|
RECTL rcl;
|
|
GLint cWidthBytes;
|
|
ULONG ulFillZ;
|
|
|
|
if (!gengc || !(pMcdState = gengc->pMcdState))
|
|
return;
|
|
|
|
// No clipping to handle. If MCDBUF_ENABLED is set there is
|
|
// no clipping to handle (see GenMcdUpdateBufferInfo in mcdcx.c).
|
|
// If MCDBUF_ENABLE is not set, then we use the MCD span call which
|
|
// will handle clipping for us.
|
|
//
|
|
// Therefore, the client rectangle from the WNDOBJ is the clear
|
|
// rectangle.
|
|
|
|
rcl = gengc->pwndLocked->rclClient;
|
|
cWidthBytes = (rcl.right - rcl.left) * sizeof(ULONG);
|
|
|
|
// Compute 32-bit z clear value.
|
|
|
|
ulFillZ = (ULONG)(gengc->gc.state.depth.clear * gengc->genAccel.zDevScale);
|
|
|
|
// If MCDBUF_ENABLED, write directly into frame buffer memory.
|
|
|
|
if (pMcdState->McdBuffers.mcdDepthBuf.bufFlags & MCDBUF_ENABLED)
|
|
{
|
|
ULONG *pul, *pulEnd;
|
|
|
|
// Note: dfb->buf.base has a buffer origin offset of (0, 0).
|
|
|
|
pul = (ULONG *) dfb->buf.base;
|
|
pulEnd = pul + ((rcl.bottom - rcl.top) * dfb->buf.outerWidth);
|
|
|
|
ASSERTOPENGL((((ULONG_PTR)pul) & 0x03) == 0,
|
|
"GenMcdClearDepth32: depth buffer not DWORD aligned\n");
|
|
|
|
for ( ; pul != pulEnd; pul += dfb->buf.outerWidth)
|
|
{
|
|
RtlFillMemoryUlong(pul, cWidthBytes, ulFillZ);
|
|
}
|
|
}
|
|
|
|
// Otherwise, fill in one span's worth and write to MCD driver via
|
|
// MCDWriteSpan.
|
|
|
|
else
|
|
{
|
|
GLint y;
|
|
GLint cWidth = rcl.right - rcl.left;
|
|
GENMCDSURFACE *pMcdSurf;
|
|
|
|
pMcdSurf = pMcdState->pMcdSurf;
|
|
ASSERTOPENGL(pMcdSurf, "GenMcdClearDepth32: no MCD surface\n");
|
|
|
|
// Fill in one span into the shared memory buffer.
|
|
|
|
ASSERTOPENGL((((ULONG_PTR)pMcdSurf->McdDepthBuf.pv) & 0x03) == 0,
|
|
"GenMcdClearDepth32: depth span buffer not DWORD aligned\n");
|
|
|
|
RtlFillMemoryUlong(pMcdSurf->McdDepthBuf.pv, cWidthBytes, ulFillZ);
|
|
|
|
// Write the span for each span in the clear rectangle.
|
|
|
|
for (y = 0; y < (rcl.bottom - rcl.top); y++)
|
|
{
|
|
if ( !(gpMcdTable->pMCDWriteSpan)(&pMcdState->McdContext,
|
|
pMcdSurf->McdDepthBuf.pv,
|
|
0, y,
|
|
cWidth, MCDSPAN_DEPTH) )
|
|
{
|
|
WARNING("GenMcdClearDepth32: MCDWriteSpan failed\n");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/************************************************************************/
|
|
|
|
GLboolean FASTCALL GenMcdDepthTestLine(__GLcontext *gc)
|
|
{
|
|
__GLzValue z, dzdx;
|
|
GLint xLittle, xBig, yLittle, yBig;
|
|
GLint xStart, yStart;
|
|
GLint fraction, dfraction;
|
|
GLint failed, count;
|
|
__GLstippleWord bit, outMask, *osp;
|
|
GLboolean writeEnabled, passed;
|
|
GLint w;
|
|
|
|
w = gc->polygon.shader.length;
|
|
|
|
xBig = gc->line.options.xBig;
|
|
yBig = gc->line.options.yBig;
|
|
xLittle = gc->line.options.xLittle;
|
|
yLittle = gc->line.options.yLittle;
|
|
xStart = gc->line.options.xStart;
|
|
yStart = gc->line.options.yStart;
|
|
fraction = gc->line.options.fraction;
|
|
dfraction = gc->line.options.dfraction;
|
|
|
|
z = gc->polygon.shader.frag.z;
|
|
dzdx = gc->polygon.shader.dzdx;
|
|
writeEnabled = gc->state.depth.writeEnable;
|
|
osp = gc->polygon.shader.stipplePat;
|
|
failed = 0;
|
|
while (w) {
|
|
count = w;
|
|
if (count > __GL_STIPPLE_BITS) {
|
|
count = __GL_STIPPLE_BITS;
|
|
}
|
|
w -= count;
|
|
|
|
outMask = (__GLstippleWord)~0;
|
|
bit = (__GLstippleWord)__GL_STIPPLE_SHIFT(0);
|
|
while (--count >= 0) {
|
|
if (!(*gc->depthBuffer.storeRaw)(&gc->depthBuffer, xStart, yStart, z)) {
|
|
outMask &= ~bit;
|
|
failed++;
|
|
}
|
|
z += dzdx;
|
|
|
|
fraction += dfraction;
|
|
if (fraction < 0) {
|
|
fraction &= ~0x80000000;
|
|
xStart += xBig;
|
|
yStart += yBig;
|
|
} else {
|
|
xStart += xLittle;
|
|
yStart += yLittle;
|
|
}
|
|
#ifdef __GL_STIPPLE_MSB
|
|
bit >>= 1;
|
|
#else
|
|
bit <<= 1;
|
|
#endif
|
|
}
|
|
*osp++ = outMask;
|
|
}
|
|
|
|
if (failed == 0) {
|
|
/* Call next span proc */
|
|
return GL_FALSE;
|
|
} else {
|
|
if (failed != gc->polygon.shader.length) {
|
|
/* Call next stippled span proc */
|
|
return GL_TRUE;
|
|
}
|
|
}
|
|
gc->polygon.shader.done = GL_TRUE;
|
|
return GL_TRUE;
|
|
}
|
|
|
|
|
|
GLboolean FASTCALL GenMcdDepthTestStippledLine(__GLcontext *gc)
|
|
{
|
|
__GLzValue z, dzdx;
|
|
GLint xLittle, xBig, yLittle, yBig;
|
|
GLint xStart, yStart;
|
|
GLint fraction, dfraction;
|
|
GLint failed, count;
|
|
__GLstippleWord bit, inMask, outMask, *sp;
|
|
GLboolean writeEnabled, passed;
|
|
GLint w;
|
|
|
|
w = gc->polygon.shader.length;
|
|
sp = gc->polygon.shader.stipplePat;
|
|
xBig = gc->line.options.xBig;
|
|
yBig = gc->line.options.yBig;
|
|
xLittle = gc->line.options.xLittle;
|
|
yLittle = gc->line.options.yLittle;
|
|
xStart = gc->line.options.xStart;
|
|
yStart = gc->line.options.yStart;
|
|
fraction = gc->line.options.fraction;
|
|
dfraction = gc->line.options.dfraction;
|
|
|
|
z = gc->polygon.shader.frag.z;
|
|
dzdx = gc->polygon.shader.dzdx;
|
|
writeEnabled = gc->state.depth.writeEnable;
|
|
failed = 0;
|
|
while (w) {
|
|
count = w;
|
|
if (count > __GL_STIPPLE_BITS) {
|
|
count = __GL_STIPPLE_BITS;
|
|
}
|
|
w -= count;
|
|
|
|
inMask = *sp;
|
|
outMask = (__GLstippleWord)~0;
|
|
bit = (__GLstippleWord)__GL_STIPPLE_SHIFT(0);
|
|
while (--count >= 0) {
|
|
if (inMask & bit) {
|
|
if (!(*gc->depthBuffer.storeRaw)(&gc->depthBuffer, xStart, yStart, z)) {
|
|
outMask &= ~bit;
|
|
failed++;
|
|
}
|
|
} else failed++;
|
|
z += dzdx;
|
|
|
|
fraction += dfraction;
|
|
if (fraction < 0) {
|
|
fraction &= ~0x80000000;
|
|
fraction &= ~0x80000000;
|
|
xStart += xBig;
|
|
yStart += yBig;
|
|
} else {
|
|
xStart += xLittle;
|
|
yStart += yLittle;
|
|
}
|
|
#ifdef __GL_STIPPLE_MSB
|
|
bit >>= 1;
|
|
#else
|
|
bit <<= 1;
|
|
#endif
|
|
}
|
|
*sp++ = outMask & inMask;
|
|
}
|
|
|
|
if (failed != gc->polygon.shader.length) {
|
|
/* Call next proc */
|
|
return GL_FALSE;
|
|
}
|
|
return GL_TRUE;
|
|
}
|
|
|
|
GLboolean FASTCALL GenMcdDepthTestStencilLine(__GLcontext *gc)
|
|
{
|
|
__GLstencilCell *sfb, *zPassOp, *zFailOp;
|
|
GLint xLittle, xBig, yLittle, yBig;
|
|
GLint xStart, yStart;
|
|
GLint fraction, dfraction;
|
|
GLint dspLittle, dspBig;
|
|
__GLzValue z, dzdx;
|
|
GLint failed, count;
|
|
__GLstippleWord bit, outMask, *osp;
|
|
GLboolean writeEnabled, passed;
|
|
GLint w;
|
|
|
|
w = gc->polygon.shader.length;
|
|
|
|
xBig = gc->line.options.xBig;
|
|
yBig = gc->line.options.yBig;
|
|
xLittle = gc->line.options.xLittle;
|
|
yLittle = gc->line.options.yLittle;
|
|
xStart = gc->line.options.xStart;
|
|
yStart = gc->line.options.yStart;
|
|
fraction = gc->line.options.fraction;
|
|
dfraction = gc->line.options.dfraction;
|
|
|
|
sfb = __GL_STENCIL_ADDR(&gc->stencilBuffer, (__GLstencilCell*),
|
|
gc->line.options.xStart, gc->line.options.yStart);
|
|
dspLittle = xLittle + yLittle * gc->stencilBuffer.buf.outerWidth;
|
|
dspBig = xBig + yBig * gc->stencilBuffer.buf.outerWidth;
|
|
fraction = gc->line.options.fraction;
|
|
dfraction = gc->line.options.dfraction;
|
|
|
|
zFailOp = gc->stencilBuffer.depthFailOpTable;
|
|
zPassOp = gc->stencilBuffer.depthPassOpTable;
|
|
z = gc->polygon.shader.frag.z;
|
|
dzdx = gc->polygon.shader.dzdx;
|
|
writeEnabled = gc->state.depth.writeEnable;
|
|
osp = gc->polygon.shader.stipplePat;
|
|
failed = 0;
|
|
while (w) {
|
|
count = w;
|
|
if (count > __GL_STIPPLE_BITS) {
|
|
count = __GL_STIPPLE_BITS;
|
|
}
|
|
w -= count;
|
|
|
|
outMask = (__GLstippleWord)~0;
|
|
bit = (__GLstippleWord)__GL_STIPPLE_SHIFT(0);
|
|
while (--count >= 0) {
|
|
if (!(*gc->depthBuffer.storeRaw)(&gc->depthBuffer, xStart, yStart, z)) {
|
|
sfb[0] = zFailOp[sfb[0]];
|
|
outMask &= ~bit;
|
|
failed++;
|
|
} else {
|
|
sfb[0] = zPassOp[sfb[0]];
|
|
}
|
|
|
|
z += dzdx;
|
|
fraction += dfraction;
|
|
|
|
if (fraction < 0) {
|
|
fraction &= ~0x80000000;
|
|
sfb += dspBig;
|
|
xStart += xBig;
|
|
yStart += yBig;
|
|
} else {
|
|
sfb += dspLittle;
|
|
xStart += xLittle;
|
|
yStart += yLittle;
|
|
}
|
|
#ifdef __GL_STIPPLE_MSB
|
|
bit >>= 1;
|
|
#else
|
|
bit <<= 1;
|
|
#endif
|
|
}
|
|
*osp++ = outMask;
|
|
}
|
|
|
|
if (failed == 0) {
|
|
/* Call next span proc */
|
|
return GL_FALSE;
|
|
} else {
|
|
if (failed != gc->polygon.shader.length) {
|
|
/* Call next stippled span proc */
|
|
return GL_TRUE;
|
|
}
|
|
}
|
|
gc->polygon.shader.done = GL_TRUE;
|
|
return GL_TRUE;
|
|
}
|
|
|
|
GLboolean FASTCALL GenMcdDepthTestStencilStippledLine(__GLcontext *gc)
|
|
{
|
|
__GLstencilCell *sfb, *zPassOp, *zFailOp;
|
|
GLint xLittle, xBig, yLittle, yBig;
|
|
GLint xStart, yStart;
|
|
GLint fraction, dfraction;
|
|
GLint dspLittle, dspBig;
|
|
__GLzValue z, dzdx;
|
|
GLint failed, count;
|
|
__GLstippleWord bit, inMask, outMask, *sp;
|
|
GLboolean writeEnabled, passed;
|
|
GLint w;
|
|
|
|
w = gc->polygon.shader.length;
|
|
sp = gc->polygon.shader.stipplePat;
|
|
|
|
xBig = gc->line.options.xBig;
|
|
yBig = gc->line.options.yBig;
|
|
xLittle = gc->line.options.xLittle;
|
|
yLittle = gc->line.options.yLittle;
|
|
xStart = gc->line.options.xStart;
|
|
yStart = gc->line.options.yStart;
|
|
fraction = gc->line.options.fraction;
|
|
dfraction = gc->line.options.dfraction;
|
|
|
|
sfb = __GL_STENCIL_ADDR(&gc->stencilBuffer, (__GLstencilCell*),
|
|
gc->line.options.xStart, gc->line.options.yStart);
|
|
dspLittle = xLittle + yLittle * gc->stencilBuffer.buf.outerWidth;
|
|
dspBig = xBig + yBig * gc->stencilBuffer.buf.outerWidth;
|
|
fraction = gc->line.options.fraction;
|
|
dfraction = gc->line.options.dfraction;
|
|
|
|
zFailOp = gc->stencilBuffer.depthFailOpTable;
|
|
zPassOp = gc->stencilBuffer.depthPassOpTable;
|
|
z = gc->polygon.shader.frag.z;
|
|
dzdx = gc->polygon.shader.dzdx;
|
|
writeEnabled = gc->state.depth.writeEnable;
|
|
failed = 0;
|
|
while (w) {
|
|
count = w;
|
|
if (count > __GL_STIPPLE_BITS) {
|
|
count = __GL_STIPPLE_BITS;
|
|
}
|
|
w -= count;
|
|
|
|
inMask = *sp;
|
|
outMask = (__GLstippleWord)~0;
|
|
bit = (__GLstippleWord)__GL_STIPPLE_SHIFT(0);
|
|
while (--count >= 0) {
|
|
if (inMask & bit) {
|
|
if (!(*gc->depthBuffer.storeRaw)(&gc->depthBuffer, xStart, yStart, z)) {
|
|
sfb[0] = zFailOp[sfb[0]];
|
|
outMask &= ~bit;
|
|
failed++;
|
|
} else {
|
|
sfb[0] = zPassOp[sfb[0]];
|
|
}
|
|
} else failed++;
|
|
z += dzdx;
|
|
|
|
fraction += dfraction;
|
|
if (fraction < 0) {
|
|
fraction &= ~0x80000000;
|
|
sfb += dspBig;
|
|
xStart += xBig;
|
|
yStart += yBig;
|
|
} else {
|
|
sfb += dspLittle;
|
|
xStart += xLittle;
|
|
yStart += yLittle;
|
|
}
|
|
#ifdef __GL_STIPPLE_MSB
|
|
bit >>= 1;
|
|
#else
|
|
bit <<= 1;
|
|
#endif
|
|
}
|
|
*sp++ = outMask & inMask;
|
|
}
|
|
|
|
if (failed != gc->polygon.shader.length) {
|
|
/* Call next proc */
|
|
return GL_FALSE;
|
|
}
|
|
|
|
return GL_TRUE;
|
|
}
|
|
|
|
|
|
/************************************************************************/
|
|
|
|
/*
|
|
** Depth test a span, when stenciling is disabled.
|
|
*/
|
|
GLboolean FASTCALL GenMcdDepthTestSpan(__GLcontext *gc)
|
|
{
|
|
__GLzValue z, dzdx, *zfb;
|
|
GLint failed, count, testFunc;
|
|
__GLstippleWord bit, outMask, *osp;
|
|
GLboolean writeEnabled, passed;
|
|
GLint w;
|
|
|
|
w = gc->polygon.shader.length;
|
|
|
|
GenMcdReadZSpan(&gc->depthBuffer, gc->polygon.shader.frag.x,
|
|
gc->polygon.shader.frag.y, w);
|
|
|
|
if (((__GLGENcontext *)gc)->pMcdState->softZSpanFuncPtr) {
|
|
GLboolean retVal;
|
|
|
|
gc->polygon.shader.zbuf = (__GLzValue *)((__GLGENcontext *)gc)->pMcdState->pDepthSpan;
|
|
|
|
retVal =
|
|
(*(__GLspanFunc)((__GLGENcontext *)gc)->pMcdState->softZSpanFuncPtr)(gc);
|
|
|
|
if (gc->state.depth.writeEnable)
|
|
GenMcdWriteZSpan(&gc->depthBuffer, gc->polygon.shader.frag.x,
|
|
gc->polygon.shader.frag.y,
|
|
gc->polygon.shader.length);
|
|
|
|
return retVal;
|
|
}
|
|
|
|
testFunc = gc->state.depth.testFunc & 0x7;
|
|
zfb = (__GLzValue *)((__GLGENcontext *)gc)->pMcdState->pDepthSpan;
|
|
z = gc->polygon.shader.frag.z;
|
|
dzdx = gc->polygon.shader.dzdx;
|
|
writeEnabled = gc->state.depth.writeEnable;
|
|
osp = gc->polygon.shader.stipplePat;
|
|
failed = 0;
|
|
while (w) {
|
|
count = w;
|
|
if (count > __GL_STIPPLE_BITS) {
|
|
count = __GL_STIPPLE_BITS;
|
|
}
|
|
w -= count;
|
|
|
|
outMask = (__GLstippleWord)~0;
|
|
bit = (__GLstippleWord)__GL_STIPPLE_SHIFT(0);
|
|
while (--count >= 0) {
|
|
switch (testFunc) {
|
|
case (GL_NEVER & 0x7): passed = GL_FALSE; break;
|
|
case (GL_LESS & 0x7): passed = z < zfb[0]; break;
|
|
case (GL_EQUAL & 0x7): passed = z == zfb[0]; break;
|
|
case (GL_LEQUAL & 0x7): passed = z <= zfb[0]; break;
|
|
case (GL_GREATER & 0x7): passed = z > zfb[0]; break;
|
|
case (GL_NOTEQUAL & 0x7): passed = z != zfb[0]; break;
|
|
case (GL_GEQUAL & 0x7): passed = z >= zfb[0]; break;
|
|
case (GL_ALWAYS & 0x7): passed = GL_TRUE; break;
|
|
}
|
|
if (passed) {
|
|
if (writeEnabled) {
|
|
zfb[0] = z;
|
|
}
|
|
} else {
|
|
outMask &= ~bit;
|
|
failed++;
|
|
}
|
|
z += dzdx;
|
|
zfb++;
|
|
#ifdef __GL_STIPPLE_MSB
|
|
bit >>= 1;
|
|
#else
|
|
bit <<= 1;
|
|
#endif
|
|
}
|
|
*osp++ = outMask;
|
|
}
|
|
|
|
if (writeEnabled)
|
|
GenMcdWriteZSpan(&gc->depthBuffer, gc->polygon.shader.frag.x,
|
|
gc->polygon.shader.frag.y,
|
|
gc->polygon.shader.length);
|
|
|
|
|
|
if (failed == 0) {
|
|
/* Call next span proc */
|
|
return GL_FALSE;
|
|
} else {
|
|
if (failed != gc->polygon.shader.length) {
|
|
/* Call next stippled span proc */
|
|
return GL_TRUE;
|
|
}
|
|
}
|
|
gc->polygon.shader.done = GL_TRUE;
|
|
return GL_TRUE;
|
|
}
|
|
|
|
/*
|
|
** Stippled form of depth test span, when stenciling is disabled.
|
|
*/
|
|
GLboolean FASTCALL GenMcdDepthTestStippledSpan(__GLcontext *gc)
|
|
{
|
|
__GLzValue z, dzdx, *zfb;
|
|
GLint failed, count, testFunc;
|
|
__GLstippleWord bit, inMask, outMask, *sp;
|
|
GLboolean writeEnabled, passed;
|
|
GLint w;
|
|
|
|
sp = gc->polygon.shader.stipplePat;
|
|
w = gc->polygon.shader.length;
|
|
|
|
GenMcdReadZSpan(&gc->depthBuffer, gc->polygon.shader.frag.x,
|
|
gc->polygon.shader.frag.y, w);
|
|
|
|
testFunc = gc->state.depth.testFunc & 0x7;
|
|
zfb = (__GLzValue *)((__GLGENcontext *)gc)->pMcdState->pDepthSpan;
|
|
z = gc->polygon.shader.frag.z;
|
|
dzdx = gc->polygon.shader.dzdx;
|
|
writeEnabled = gc->state.depth.writeEnable;
|
|
failed = 0;
|
|
while (w) {
|
|
count = w;
|
|
if (count > __GL_STIPPLE_BITS) {
|
|
count = __GL_STIPPLE_BITS;
|
|
}
|
|
w -= count;
|
|
|
|
inMask = *sp;
|
|
outMask = (__GLstippleWord)~0;
|
|
bit = (__GLstippleWord)__GL_STIPPLE_SHIFT(0);
|
|
while (--count >= 0) {
|
|
if (inMask & bit) {
|
|
switch (testFunc) {
|
|
case (GL_NEVER & 0x7): passed = GL_FALSE; break;
|
|
case (GL_LESS & 0x7): passed = z < zfb[0]; break;
|
|
case (GL_EQUAL & 0x7): passed = z == zfb[0]; break;
|
|
case (GL_LEQUAL & 0x7): passed = z <= zfb[0]; break;
|
|
case (GL_GREATER & 0x7): passed = z > zfb[0]; break;
|
|
case (GL_NOTEQUAL & 0x7): passed = z != zfb[0]; break;
|
|
case (GL_GEQUAL & 0x7): passed = z >= zfb[0]; break;
|
|
case (GL_ALWAYS & 0x7): passed = GL_TRUE; break;
|
|
}
|
|
if (passed) {
|
|
if (writeEnabled) {
|
|
zfb[0] = z;
|
|
}
|
|
} else {
|
|
outMask &= ~bit;
|
|
failed++;
|
|
}
|
|
} else failed++;
|
|
z += dzdx;
|
|
zfb++;
|
|
#ifdef __GL_STIPPLE_MSB
|
|
bit >>= 1;
|
|
#else
|
|
bit <<= 1;
|
|
#endif
|
|
}
|
|
*sp++ = outMask & inMask;
|
|
}
|
|
|
|
if (writeEnabled)
|
|
GenMcdWriteZSpan(&gc->depthBuffer, gc->polygon.shader.frag.x,
|
|
gc->polygon.shader.frag.y,
|
|
gc->polygon.shader.length);
|
|
|
|
if (failed != gc->polygon.shader.length) {
|
|
/* Call next proc */
|
|
return GL_FALSE;
|
|
}
|
|
return GL_TRUE;
|
|
}
|
|
|
|
/*
|
|
** Depth test a span when stenciling is enabled.
|
|
*/
|
|
GLboolean FASTCALL GenMcdDepthTestStencilSpan(__GLcontext *gc)
|
|
{
|
|
__GLstencilCell *sfb, *zPassOp, *zFailOp;
|
|
__GLzValue z, dzdx, *zfb;
|
|
GLint failed, count, testFunc;
|
|
__GLstippleWord bit, outMask, *osp;
|
|
GLboolean writeEnabled, passed;
|
|
GLint w;
|
|
|
|
w = gc->polygon.shader.length;
|
|
|
|
GenMcdReadZSpan(&gc->depthBuffer, gc->polygon.shader.frag.x,
|
|
gc->polygon.shader.frag.y, w);
|
|
|
|
testFunc = gc->state.depth.testFunc & 0x7;
|
|
zfb = (__GLzValue *)((__GLGENcontext *)gc)->pMcdState->pDepthSpan;
|
|
sfb = gc->polygon.shader.sbuf;
|
|
zFailOp = gc->stencilBuffer.depthFailOpTable;
|
|
zPassOp = gc->stencilBuffer.depthPassOpTable;
|
|
z = gc->polygon.shader.frag.z;
|
|
dzdx = gc->polygon.shader.dzdx;
|
|
writeEnabled = gc->state.depth.writeEnable;
|
|
osp = gc->polygon.shader.stipplePat;
|
|
failed = 0;
|
|
while (w) {
|
|
count = w;
|
|
if (count > __GL_STIPPLE_BITS) {
|
|
count = __GL_STIPPLE_BITS;
|
|
}
|
|
w -= count;
|
|
|
|
outMask = (__GLstippleWord)~0;
|
|
bit = (__GLstippleWord)__GL_STIPPLE_SHIFT(0);
|
|
while (--count >= 0) {
|
|
switch (testFunc) {
|
|
case (GL_NEVER & 0x7): passed = GL_FALSE; break;
|
|
case (GL_LESS & 0x7): passed = z < zfb[0]; break;
|
|
case (GL_EQUAL & 0x7): passed = z == zfb[0]; break;
|
|
case (GL_LEQUAL & 0x7): passed = z <= zfb[0]; break;
|
|
case (GL_GREATER & 0x7): passed = z > zfb[0]; break;
|
|
case (GL_NOTEQUAL & 0x7): passed = z != zfb[0]; break;
|
|
case (GL_GEQUAL & 0x7): passed = z >= zfb[0]; break;
|
|
case (GL_ALWAYS & 0x7): passed = GL_TRUE; break;
|
|
}
|
|
if (passed) {
|
|
sfb[0] = zPassOp[sfb[0]];
|
|
if (writeEnabled) {
|
|
zfb[0] = z;
|
|
}
|
|
} else {
|
|
sfb[0] = zFailOp[sfb[0]];
|
|
outMask &= ~bit;
|
|
failed++;
|
|
}
|
|
z += dzdx;
|
|
zfb++;
|
|
sfb++;
|
|
#ifdef __GL_STIPPLE_MSB
|
|
bit >>= 1;
|
|
#else
|
|
bit <<= 1;
|
|
#endif
|
|
}
|
|
*osp++ = outMask;
|
|
}
|
|
|
|
if (writeEnabled)
|
|
GenMcdWriteZSpan(&gc->depthBuffer, gc->polygon.shader.frag.x,
|
|
gc->polygon.shader.frag.y,
|
|
gc->polygon.shader.length);
|
|
|
|
if (failed == 0) {
|
|
/* Call next span proc */
|
|
return GL_FALSE;
|
|
} else {
|
|
if (failed != gc->polygon.shader.length) {
|
|
/* Call next stippled span proc */
|
|
return GL_TRUE;
|
|
}
|
|
}
|
|
gc->polygon.shader.done = GL_TRUE;
|
|
return GL_TRUE;
|
|
}
|
|
|
|
/*
|
|
** Stippled form of depth test span, when stenciling is enabled.
|
|
*/
|
|
GLboolean FASTCALL GenMcdDepthTestStencilStippledSpan(__GLcontext *gc)
|
|
{
|
|
__GLstencilCell *sfb, *zPassOp, *zFailOp;
|
|
__GLzValue z, dzdx, *zfb;
|
|
GLint failed, count, testFunc;
|
|
__GLstippleWord bit, inMask, outMask, *sp;
|
|
GLboolean writeEnabled, passed;
|
|
GLint w;
|
|
|
|
w = gc->polygon.shader.length;
|
|
sp = gc->polygon.shader.stipplePat;
|
|
|
|
GenMcdReadZSpan(&gc->depthBuffer, gc->polygon.shader.frag.x,
|
|
gc->polygon.shader.frag.y, w);
|
|
|
|
testFunc = gc->state.depth.testFunc & 0x7;
|
|
zfb = (__GLzValue *)((__GLGENcontext *)gc)->pMcdState->pDepthSpan;
|
|
sfb = gc->polygon.shader.sbuf;
|
|
zFailOp = gc->stencilBuffer.depthFailOpTable;
|
|
zPassOp = gc->stencilBuffer.depthPassOpTable;
|
|
z = gc->polygon.shader.frag.z;
|
|
dzdx = gc->polygon.shader.dzdx;
|
|
writeEnabled = gc->state.depth.writeEnable;
|
|
failed = 0;
|
|
while (w) {
|
|
count = w;
|
|
if (count > __GL_STIPPLE_BITS) {
|
|
count = __GL_STIPPLE_BITS;
|
|
}
|
|
w -= count;
|
|
|
|
inMask = *sp;
|
|
outMask = (__GLstippleWord)~0;
|
|
bit = (__GLstippleWord)__GL_STIPPLE_SHIFT(0);
|
|
while (--count >= 0) {
|
|
if (inMask & bit) {
|
|
switch (testFunc) {
|
|
case (GL_NEVER & 0x7): passed = GL_FALSE; break;
|
|
case (GL_LESS & 0x7): passed = z < zfb[0]; break;
|
|
case (GL_EQUAL & 0x7): passed = z == zfb[0]; break;
|
|
case (GL_LEQUAL & 0x7): passed = z <= zfb[0]; break;
|
|
case (GL_GREATER & 0x7): passed = z > zfb[0]; break;
|
|
case (GL_NOTEQUAL & 0x7): passed = z != zfb[0]; break;
|
|
case (GL_GEQUAL & 0x7): passed = z >= zfb[0]; break;
|
|
case (GL_ALWAYS & 0x7): passed = GL_TRUE; break;
|
|
}
|
|
if (passed) {
|
|
sfb[0] = zPassOp[sfb[0]];
|
|
if (writeEnabled) {
|
|
zfb[0] = z;
|
|
}
|
|
} else {
|
|
sfb[0] = zFailOp[sfb[0]];
|
|
outMask &= ~bit;
|
|
failed++;
|
|
}
|
|
} else failed++;
|
|
z += dzdx;
|
|
zfb++;
|
|
sfb++;
|
|
#ifdef __GL_STIPPLE_MSB
|
|
bit >>= 1;
|
|
#else
|
|
bit <<= 1;
|
|
#endif
|
|
}
|
|
*sp++ = outMask & inMask;
|
|
}
|
|
|
|
if (writeEnabled)
|
|
GenMcdWriteZSpan(&gc->depthBuffer, gc->polygon.shader.frag.x,
|
|
gc->polygon.shader.frag.y,
|
|
gc->polygon.shader.length);
|
|
|
|
if (failed != gc->polygon.shader.length) {
|
|
/* Call next proc */
|
|
return GL_FALSE;
|
|
}
|
|
|
|
return GL_TRUE;
|
|
}
|
|
|
|
/*
|
|
** MCD version of __fastGenStippleAnyDepthTestSpan. See __fastGenPickSpanProcs
|
|
** in genaccel.c and __fastGenStippleAnyDepthTestSpan in genspan.c.
|
|
*/
|
|
GLboolean FASTCALL GenMcdStippleAnyDepthTestSpan(__GLcontext *gc)
|
|
{
|
|
// If the shader is done after this routine then
|
|
// the stipple pattern is all zeroes so we can
|
|
// skip the span
|
|
__glStippleSpan(gc);
|
|
if (gc->polygon.shader.done)
|
|
{
|
|
return GL_FALSE;
|
|
}
|
|
|
|
// If this returns true then all bits are off so
|
|
// we can skip the span
|
|
return !GenMcdDepthTestStippledSpan(gc);
|
|
}
|
|
|
|
#ifdef NT_DEADCODE_GENMCDSTIPPLESPAN
|
|
//
|
|
// The code below works (it must be enabled in the __fastGenPickSpanProcs
|
|
// function), but it doesn't seem worth turning it on and increasing the
|
|
// DLL size to slightly speed up a rarely used MCD kickback case.
|
|
//
|
|
// Here are the prototypes for mcdcx.h if the code is turned on:
|
|
//
|
|
// GLboolean FASTCALL GenMcdStippleLt32Span(__GLcontext *);
|
|
// GLboolean FASTCALL GenMcdStippleLt16Span(__GLcontext *);
|
|
//
|
|
|
|
/*
|
|
** MCD version of __fastGenStippleLt32Span, a special case of
|
|
** GenMcdStippleAnyDepthTestSpan for 32-bit depth buffers and GL_LESS
|
|
** depth test.
|
|
**
|
|
** See __fastGenPickSpanProcs in genaccel.c and __fastGenStippleLt32Span in
|
|
** genspan.c.
|
|
*/
|
|
GLboolean FASTCALL GenMcdStippleLt32Span(__GLcontext *gc)
|
|
{
|
|
register GLuint zAccum = gc->polygon.shader.frag.z;
|
|
register GLint zDelta = gc->polygon.shader.dzdx;
|
|
register GLuint *zbuf = (GLuint *)
|
|
((__GLGENcontext *)gc)->pMcdState->pMcdSurf->McdDepthBuf.pv;
|
|
register GLuint *pStipple = gc->polygon.shader.stipplePat;
|
|
register GLint cTotalPix = gc->polygon.shader.length;
|
|
register GLuint mask;
|
|
register GLint cPix;
|
|
register GLint zPasses = 0;
|
|
register GLuint maskBit;
|
|
__GLstippleWord stipple;
|
|
GLint count;
|
|
GLint shift;
|
|
|
|
GenMcdReadZRawSpan(&gc->depthBuffer, gc->polygon.shader.frag.x,
|
|
gc->polygon.shader.frag.y, gc->polygon.shader.length);
|
|
|
|
if (gc->constants.yInverted) {
|
|
stipple = gc->polygon.stipple[(gc->constants.height -
|
|
(gc->polygon.shader.frag.y - gc->constants.viewportYAdjust)-1)
|
|
& (__GL_STIPPLE_BITS-1)];
|
|
} else {
|
|
stipple = gc->polygon.stipple[gc->polygon.shader.frag.y &
|
|
(__GL_STIPPLE_BITS-1)];
|
|
}
|
|
shift = gc->polygon.shader.frag.x & (__GL_STIPPLE_BITS - 1);
|
|
#ifdef __GL_STIPPLE_MSB
|
|
stipple = (stipple << shift) | (stipple >> (__GL_STIPPLE_BITS - shift));
|
|
#else
|
|
stipple = (stipple >> shift) | (stipple << (__GL_STIPPLE_BITS - shift));
|
|
#endif
|
|
if (stipple == 0) {
|
|
/* No point in continuing */
|
|
return GL_FALSE;
|
|
}
|
|
|
|
for (;cTotalPix > 0; cTotalPix-=32) {
|
|
mask = stipple;
|
|
maskBit = 0x80000000;
|
|
cPix = cTotalPix;
|
|
if (cPix > 32)
|
|
cPix = 32;
|
|
|
|
for (;cPix > 0; cPix --)
|
|
{
|
|
if (mask & maskBit)
|
|
{
|
|
if ((zAccum) < (*zbuf))
|
|
{
|
|
*zbuf = zAccum;
|
|
zPasses++;
|
|
}
|
|
else
|
|
{
|
|
mask &= ~maskBit;
|
|
}
|
|
}
|
|
zbuf++;
|
|
zAccum += zDelta;
|
|
maskBit >>= 1;
|
|
}
|
|
|
|
*pStipple++ = mask;
|
|
}
|
|
|
|
if (gc->state.depth.writeEnable)
|
|
GenMcdWriteZRawSpan(&gc->depthBuffer,
|
|
gc->polygon.shader.frag.x,
|
|
gc->polygon.shader.frag.y,
|
|
gc->polygon.shader.length);
|
|
|
|
if (zPasses == 0) {
|
|
return GL_FALSE;
|
|
} else {
|
|
return GL_TRUE;
|
|
}
|
|
}
|
|
|
|
/*
|
|
** MCD version of __fastGenStippleLt16Span, a special case of
|
|
** GenMcdStippleAnyDepthTestSpan for 16-bit depth buffers and GL_LESS
|
|
** depth test.
|
|
**
|
|
** See __fastGenPickSpanProcs in genaccel.c and __fastGenStippleLt16Span in
|
|
** genspan.c.
|
|
*/
|
|
GLboolean FASTCALL GenMcdStippleLt16Span(__GLcontext *gc)
|
|
{
|
|
register GLuint zAccum = gc->polygon.shader.frag.z;
|
|
register GLint zDelta = gc->polygon.shader.dzdx;
|
|
register __GLz16Value *zbuf = (__GLz16Value *)
|
|
((__GLGENcontext *)gc)->pMcdState->pMcdSurf->McdDepthBuf.pv;
|
|
register GLuint *pStipple = gc->polygon.shader.stipplePat;
|
|
register GLint cTotalPix = gc->polygon.shader.length;
|
|
register GLuint mask;
|
|
register GLint cPix;
|
|
register GLint zPasses = 0;
|
|
register GLuint maskBit;
|
|
__GLstippleWord stipple;
|
|
GLint count;
|
|
GLint shift;
|
|
|
|
GenMcdReadZRawSpan(&gc->depthBuffer, gc->polygon.shader.frag.x,
|
|
gc->polygon.shader.frag.y, gc->polygon.shader.length);
|
|
|
|
if (gc->constants.yInverted) {
|
|
stipple = gc->polygon.stipple[(gc->constants.height -
|
|
(gc->polygon.shader.frag.y - gc->constants.viewportYAdjust)-1)
|
|
& (__GL_STIPPLE_BITS-1)];
|
|
} else {
|
|
stipple = gc->polygon.stipple[gc->polygon.shader.frag.y &
|
|
(__GL_STIPPLE_BITS-1)];
|
|
}
|
|
shift = gc->polygon.shader.frag.x & (__GL_STIPPLE_BITS - 1);
|
|
#ifdef __GL_STIPPLE_MSB
|
|
stipple = (stipple << shift) | (stipple >> (__GL_STIPPLE_BITS - shift));
|
|
#else
|
|
stipple = (stipple >> shift) | (stipple << (__GL_STIPPLE_BITS - shift));
|
|
#endif
|
|
if (stipple == 0) {
|
|
/* No point in continuing */
|
|
return GL_FALSE;
|
|
}
|
|
|
|
for (;cTotalPix > 0; cTotalPix-=32) {
|
|
mask = stipple;
|
|
maskBit = 0x80000000;
|
|
cPix = cTotalPix;
|
|
if (cPix > 32)
|
|
cPix = 32;
|
|
|
|
for (;cPix > 0; cPix --)
|
|
{
|
|
if (mask & maskBit)
|
|
{
|
|
if (((__GLz16Value)(zAccum >> Z16_SHIFT)) < (*zbuf))
|
|
{
|
|
*zbuf = ((__GLz16Value)(zAccum >> Z16_SHIFT));
|
|
zPasses++;
|
|
}
|
|
else
|
|
{
|
|
mask &= ~maskBit;
|
|
}
|
|
}
|
|
zbuf++;
|
|
zAccum += zDelta;
|
|
maskBit >>= 1;
|
|
}
|
|
|
|
*pStipple++ = mask;
|
|
}
|
|
|
|
if (gc->state.depth.writeEnable)
|
|
GenMcdWriteZRawSpan(&gc->depthBuffer,
|
|
gc->polygon.shader.frag.x,
|
|
gc->polygon.shader.frag.y,
|
|
gc->polygon.shader.length);
|
|
|
|
if (zPasses == 0) {
|
|
return GL_FALSE;
|
|
} else {
|
|
return GL_TRUE;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#endif //_MCD_
|