Files
glide/glide3x/h5/glide3/src/gstrip.c

277 lines
7.4 KiB
C

/*
** THIS SOFTWARE IS SUBJECT TO COPYRIGHT PROTECTION AND IS OFFERED ONLY
** PURSUANT TO THE 3DFX GLIDE GENERAL PUBLIC LICENSE. THERE IS NO RIGHT
** TO USE THE GLIDE TRADEMARK WITHOUT PRIOR WRITTEN PERMISSION OF 3DFX
** INTERACTIVE, INC. A COPY OF THIS LICENSE MAY BE OBTAINED FROM THE
** DISTRIBUTOR OR BY CONTACTING 3DFX INTERACTIVE INC(info@3dfx.com).
** THIS PROGRAM IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
** EXPRESSED OR IMPLIED. SEE THE 3DFX GLIDE GENERAL PUBLIC LICENSE FOR A
** FULL TEXT OF THE NON-WARRANTY PROVISIONS.
**
** 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 UNPUBLISHED RIGHTS RESERVED UNDER THE COPYRIGHT LAWS OF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.
**
** COPYRIGHT 3DFX INTERACTIVE, INC. 1999, ALL RIGHTS RESERVED
**
** $Header$
** $Log:
** 3 3dfx 1.0.1.0.1.0 10/11/00 Brent Forced check in to enforce
** branching.
** 2 3dfx 1.0.1.0 06/20/00 Joseph Kain Changes to support the
** Napalm Glide open source release. Changes include cleaned up offensive
** comments and new legal headers.
** 1 3dfx 1.0 09/11/99 StarTeam VTS Administrator
** $
**
** 14 7/14/99 9:39a Atai
** direct register write for glide3x
** test04 can do 4 sample aa (2 chips)
**
** 13 6/03/99 12:14p Kcd
** PowerPC still needs some C code when C triangle setup is disabled.
**
** 12 4/16/99 2:58p Kcd
** Hack to use more general (but slower) SETF() macro.
**
** 11 12/03/98 11:26p Dow
**
** 10 10/16/98 1:24p Peter
** c trisetup fixes
**
** 9 6/09/98 11:59a Atai
** 1. update glide header
** 2. fix cull mode
** 3. fix tri stats
**
** 8 5/15/98 4:02p Atai
** fogCoord and texchroma extension for Banshee
**
** 6 3/21/98 11:31a Atai
** added GR_TRIANGLE_STRIP_CONTINUE and GR_TRIANGLE_FAN_CONTINUE
**
** 5 2/24/98 6:00p Atai
** use 0 offset for vertex data
**
** 4 2/03/98 3:40p Atai
** remove aa strip/fan and code clean up
**
** 3 1/26/98 11:30a Atai
** update to new glide.h
**
** 2 1/22/98 10:35a Atai
** 1. introduce GLIDE_VERSION, g3\glide.h, g3\glideutl.h, g2\glide.h,
** g2\glideutl.h
** 2. fixed grChromaRange, grSstOrigin, and grGetProcAddress
*
* 1 1/16/98 4:29p Atai
* create glide 3 src
*
* 19 12/12/97 12:43p Atai
* move i and dateElem into the set up loop
*
* 17 12/08/97 10:38a Atai
* added grDrawVertexArrayLinear()
*
* 16 11/21/97 6:05p Atai
* use one datalist (tsuDataList) in glide3
*
* 15 11/06/97 6:10p Atai
* update GrState size
* rename grDrawArray to grDrawVertexArray
* update _grDrawPoint and _grDrawVertexList
*
* 14 11/04/97 6:35p Atai
* 1. sync with data structure changes
* 2. break up aa triangle routine
*
* 13 11/04/97 4:57p Atai
* use byte offset
*
* 12 11/03/97 3:43p Peter
* h3/cvg cataclysm
*
* 11 10/17/97 2:11p Atai
* added grContinueArray. We only support non aa mode for now.
*
* 10 10/16/97 1:50p Atai
* fix drawarray bugs
*
* 9 10/14/97 6:16p Atai
* reverse triangle order in _grAADrawVertexList
*
* 8 10/14/97 5:41p Atai
* added _grAADrawVertexList()
*
* 7 10/14/97 4:57p Dow
* Clamping
*
* 6 10/09/97 8:02p Dow
* State Monster 1st Cut
*
* 5 10/08/97 11:32a Peter
* pre-computed packet headers for packet 3
*
* 4 9/29/97 1:26p Dow
* Fixed packed color strips/fans
*
* 3 9/26/97 10:24a Dow
* Fixed state effage in Glide3 parameter data
*
* 2 9/23/97 2:35p Dow
* One less loop
*
* 1 9/23/97 2:04p Dow
* DD code for strips
**
*/
#if SET_BSWAP
#define SLOW_SETF 1
#endif
#ifdef GLIDE3
#include <3dfx.h>
#include <glidesys.h>
#define FX_DLL_DEFINITION
#include <fxdll.h>
#include <glide.h>
#include "fxglide.h"
#include "fxcmd.h"
#if (GLIDE_PLATFORM & GLIDE_SST_SIM)
#if HAL_CSIM
#include <csim.h>
#else
#include <gsim.h>
#endif
#endif
#if GLIDE_USE_C_TRISETUP || __POWERPC__
/*-------------------------------------------------------------------
Function: _grDrawVertexList
Date: 18-Sep-97
Implementor(s): dow
Description:
Sends a triangle strip to CVG.
Arguments:
Return:
-------------------------------------------------------------------*/
void FX_CSTYLE
_grDrawVertexList(FxU32 pktype, FxU32 type, FxI32 mode, FxI32 count, void *pointers)
{
#define FN_NAME "_grDrawVertexList"
#if GLIDE_HW_TRI_SETUP && GLIDE_PACKET3_TRI_SETUP
/*
** simplified code
*/
FxU32 vSize;
FxI32 stride;
GR_BEGIN_NOFIFOCHECK(FN_NAME, 90);
GDBG_INFO_MORE(gc->myLevel, "(type = 0x%x, count = %d, pointers = 0x%x)\n",
type, count, pointers);
GR_FLUSH_STATE();
vSize = gc->state.vData.vSize;
if (mode == 0)
stride = gc->state.vData.vStride;
else
stride = sizeof(float *) / sizeof (float);
/* Draw the first (or possibly only) set. This is necessary because
the packet is 3_BDDDDDD, and in the next set, the packet is
3_DDDDDD */
/*
** We try to make tstrip code simple to read. We combine the original code
** into a single loop by adding an extra packet type assignment at the end of the loop.
** Also, the debugging code are removed temporarily.
*/
if (gc->state.grCoordinateSpaceArgs.coordinate_space_mode == GR_WINDOW_COORDS) {
while (count > 0) {
FxI32 k, vcount = count >= 15 ? 15 : count;
GR_SET_EXPECTED_SIZE(vcount * vSize, 1);
TRI_STRIP_BEGIN(type, vcount, vSize, pktype);
/*
** If we use a while loop, the compiler will increment vNum and store the value back
** to the memory at every loop. In a for loop, vNum data are kept in a register.
** After the loop complete, the vNum data are written back to memory.
*/
for (k = 0; k < vcount; k++) {
FxI32 i;
FxU32 dataElem;
float *vPtr;
vPtr = pointers;
if (mode)
vPtr = *(float **)vPtr;
pointers = (float *)pointers + stride;
TRI_SETF(FARRAY(vPtr, 0));
dataElem = 0;
TRI_SETF(FARRAY(vPtr, 4));
i = gc->tsuDataList[dataElem];
while (i != GR_DLIST_END) {
TRI_SETF(FARRAY(vPtr, i));
dataElem++;
i = gc->tsuDataList[dataElem];
}
}
TRI_END;
GR_CHECK_SIZE();
count -= 15;
pktype = SSTCP_PKT3_DDDDDD;
}
}
else {
/*
* first cut of clip space coordinate code, no optimization.
*/
float oow;
while (count > 0) {
FxI32 k, vcount = count >= 15 ? 15 : count;
GR_SET_EXPECTED_SIZE(vcount * vSize, 1);
TRI_STRIP_BEGIN(type, vcount, vSize, pktype);
for (k = 0; k < vcount; k++) {
float *vPtr;
vPtr = pointers;
if (mode)
vPtr = *(float **)vPtr;
oow = 1.0f / FARRAY(vPtr, gc->state.vData.wInfo.offset);
/* x, y */
TRI_SETF(FARRAY(vPtr, 0)
*oow*gc->state.Viewport.hwidth + gc->state.Viewport.ox);
TRI_SETF(FARRAY(vPtr, 4)
*oow*gc->state.Viewport.hheight + gc->state.Viewport.oy);
pointers = (float *)pointers + stride;
TRI_VP_SETFS(vPtr, oow);
}
TRI_END;
GR_CHECK_SIZE();
count -= 15;
pktype = SSTCP_PKT3_DDDDDD;
}
}
#endif
#undef FN_NAME
} /* _grDrawVertexList */
#endif
#endif