1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
|
/* -*- mode: C; tab-width:8; c-basic-offset:2 -*- */
/*
* Mesa 3-D graphics library
* Version: 3.3
*
* Copyright (C) 1999-2000 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*
* Original Mesa / 3Dfx device driver (C) 1999 David Bucciarelli, by the
* terms stated above.
*
* Thank you for your contribution, David!
*
* Please make note of the above copyright/license statement. If you
* contributed code or bug fixes to this code under the previous (GNU
* Library) license and object to the new license, your code will be
* removed at your request. Please see the Mesa docs/COPYRIGHT file
* for more information.
*
* Additional Mesa/3Dfx driver developers:
* Daryll Strauss <daryll@precisioninsight.com>
* Keith Whitwell <keith@precisioninsight.com>
*
* See fxapi.h for more revision/author details.
*/
#ifdef HAVE_CONFIG_H
#include "conf.h"
#endif
#if defined(FX)
#include "types.h"
#include "cva.h"
#include "mmath.h"
#include "fxdrv.h"
#include "vertices.h"
#include "X86/common_x86asm.h"
#if 0 && defined(__i386__)
#define NEGATIVE(f) ((*(int *)&f) < 0)
#define DIFFERENT_SIGNS(a,b) (((*(int *)&a)^(*(int *)&b)) < 0)
#else
#define NEGATIVE(f) (f < 0)
#define DIFFERENT_SIGNS(a,b) ((a*b) < 0)
#endif
#define LINTERP( T, A, B ) ( (A) + (T) * ( (B) - (A) ) )
#define CLIP(sgn,v,PLANE) \
if (mask & PLANE) { \
GLuint *indata = inlist[in]; \
GLuint *outdata = inlist[in ^= 1]; \
GLuint nr = n; \
GLfloat *J = verts[indata[nr-1]].f; \
GLfloat dpJ = (sgn J[v]) + J[CLIP_WCOORD]; \
\
inlist[0] = vlist1; \
for (i = n = 0 ; i < nr ; i++) { \
GLuint elt_i = indata[i]; \
GLfloat *I = verts[elt_i].f; \
GLfloat dpI = (sgn I[v]) + I[CLIP_WCOORD]; \
\
if (DIFFERENT_SIGNS(dpI, dpJ)) { \
GLfloat *O = verts[next_vert].f; \
GLfloat t = dpI / (dpI - dpJ); \
GLuint j; \
\
clipmask[next_vert] = 0; \
outdata[n++] = next_vert++; \
\
for (j = 0 ; j < SIZE ; j += 2) { \
O[j] = LINTERP(t, I[j], J[j]); \
O[j+1] = LINTERP(t, I[j+1], J[j+1]); \
} \
} \
\
clipmask[elt_i] |= PLANE; /* don't set up */ \
\
if (!NEGATIVE(dpI)) { \
outdata[n++] = elt_i; \
clipmask[elt_i] &= ~PLANE; /* set up after all */ \
} \
\
J = I; \
dpJ = dpI; \
} \
\
if (n < 3) return; \
}
#define LINE_CLIP(x,y,z,w,PLANE) \
if (mask & PLANE) { \
GLfloat dpI = DOT4V(I,x,y,z,w); \
GLfloat dpJ = DOT4V(J,x,y,z,w); \
\
if (DIFFERENT_SIGNS(dpI, dpJ)) { \
GLfloat *O = verts[next_vert].f; \
GLfloat t = dpI / (dpI - dpJ); \
GLuint j; \
\
for (j = 0 ; j < SIZE ; j += 2) { \
O[j] = LINTERP(t, I[j], J[j]); \
O[j+1] = LINTERP(t, I[j+1], J[j+1]); \
} \
\
clipmask[next_vert] = 0; \
\
if (NEGATIVE(dpI)) { \
clipmask[elts[0]] |= PLANE; \
I = O; elts[0] = next_vert++; \
} else { \
clipmask[elts[1]] |= PLANE; \
J = O; elts[1] = next_vert++; \
} \
} \
else if (NEGATIVE(dpI)) \
return; \
}
#define CLIP_POINT( e ) \
if (mask[e]) \
*out++ = e
#define CLIP_LINE( e1, e0 ) \
do { \
GLubyte ormask = mask[e0] | mask[e1]; \
out[0] = e1; \
out[1] = e0; \
out+=2; \
if (ormask) { \
out-=2; \
if (!(mask[e0] & mask[e1])) { \
TAG(fx_line_clip)( &out, verts, mask, &next_vert, ormask); \
} \
} \
} while (0)
#define CLIP_TRIANGLE( e2, e1, e0 ) \
do { \
GLubyte ormask; \
out[0] = e2; \
out[1] = e1; \
out[2] = e0; \
out += 3; \
ormask = mask[e2] | mask[e1] | mask[e0]; \
if (ormask) { \
out -= 3; \
if ( !(mask[e2] & mask[e1] & mask[e0])) { \
TAG(fx_tri_clip)( &out, verts, mask, &next_vert, ormask ); \
} \
} \
} while (0)
#if defined(FX_V2) || defined(DRIVERTS)
#define VARS_XYZ \
GLfloat vsx = mat[MAT_SX]; \
GLfloat vsy = mat[MAT_SY]; \
GLfloat vsz = mat[MAT_SZ]; \
GLfloat vtx = mat[MAT_TX]; \
GLfloat vty = mat[MAT_TY]; \
GLfloat vtz = mat[MAT_TZ];
#define DO_SETUP_XYZ \
f[XCOORD] = f[0] * oow * vsx + vtx; \
f[YCOORD] = f[1] * oow * vsy + vty; \
f[ZCOORD] = f[2] * oow * vsz + vtz;
#else
#if defined(HAVE_FAST_MATH)
#define VARS_XYZ \
GLfloat vsx = mat[MAT_SX]; \
GLfloat vsy = mat[MAT_SY]; \
GLfloat vsz = mat[MAT_SZ]; \
const GLfloat snapper = (3L << 18); \
GLfloat vtx = mat[MAT_TX] + snapper; \
GLfloat vty = mat[MAT_TY] + snapper; \
GLfloat vtz = mat[MAT_TZ];
#define DO_SETUP_XYZ \
f[XCOORD] = f[0] * oow * vsx + vtx; \
f[XCOORD] -= snapper; \
f[YCOORD] = f[1] * oow * vsy + vty; \
f[YCOORD] -= snapper; \
f[ZCOORD] = f[2] * oow * vsz + vtz;
#else
#define VARS_XYZ \
GLfloat vsx = mat[MAT_SX] * 16.0f; \
GLfloat vsy = mat[MAT_SY] * 16.0f; \
GLfloat vsz = mat[MAT_SZ]; \
GLfloat vtx = mat[MAT_TX] * 16.0f; \
GLfloat vty = mat[MAT_TY] * 16.0f; \
GLfloat vtz = mat[MAT_TZ];
#define DO_SETUP_XYZ \
f[XCOORD] = ((int)(f[0]*oow*vsx+vtx)) * (1.0f/16.0f); \
f[YCOORD] = ((int)(f[1]*oow*vsy+vty)) * (1.0f/16.0f); \
f[ZCOORD] = f[2]*oow*vsz + vtz;
#endif
#endif
struct fx_fast_tab
{
void (*build_vertices)( struct vertex_buffer *VB, GLuint do_clip );
void (*clip[GL_POLYGON+1])( struct vertex_buffer *VB,
GLuint start,
GLuint count,
GLuint parity );
void (*project_clipped_vertices)( GLfloat *first,
GLfloat *last,
const GLfloat *mat,
GLuint stride,
const GLubyte *mask );
void (*project_vertices)( GLfloat *first,
GLfloat *last,
const GLfloat *mat,
GLuint stride );
};
/* Pack either rgba or texture into the remaining half of a 32 byte vertex.
*/
#define CLIP_R CLIP_RCOORD
#define CLIP_G CLIP_GCOORD
#define CLIP_B CLIP_BCOORD
#define CLIP_A CLIP_ACOORD
#define CLIP_S0 4
#define CLIP_T0 5
#define CLIP_S1 6
#define CLIP_T1 7
#define SIZE 4
#define TYPE (0)
#define TAG(x) x
#include "fxfasttmp.h"
#define SIZE 8
#define TYPE (SETUP_RGBA)
#define TAG(x) x##_RGBA
#include "fxfasttmp.h"
#define SIZE 6
#define TYPE (SETUP_TMU0)
#define TAG(x) x##_TMU0
#include "fxfasttmp.h"
#define SIZE 8
#define TYPE (SETUP_TMU0|SETUP_TMU1)
#define TAG(x) x##_TMU0_TMU1
#include "fxfasttmp.h"
#undef CLIP_S1
#undef CLIP_T1
#define CLIP_S1 4
#define CLIP_T1 5
#define SIZE 6
#define TYPE (SETUP_TMU1)
#define TAG(x) x##_TMU1
#include "fxfasttmp.h"
/* These three need to use a full 64 byte clip-space vertex.
*/
#undef CLIP_S0
#undef CLIP_T0
#undef CLIP_S1
#undef CLIP_T1
#define CLIP_S0 8
#define CLIP_T0 9
#define CLIP_S1 10
#define CLIP_T1 11
#define SIZE 10
#define TYPE (SETUP_RGBA|SETUP_TMU0)
#define TAG(x) x##_RGBA_TMU0
#include "fxfasttmp.h"
#define SIZE 12
#define TYPE (SETUP_RGBA|SETUP_TMU0|SETUP_TMU1)
#define TAG(x) x##_RGBA_TMU0_TMU1
#include "fxfasttmp.h"
#undef CLIP_S1
#undef CLIP_T1
#define CLIP_S1 8
#define CLIP_T1 9
#define SIZE 10
#define TYPE (SETUP_RGBA|SETUP_TMU1)
#define TAG(x) x##_RGBA_TMU1
#include "fxfasttmp.h"
static struct fx_fast_tab fxFastTab[0x8];
void fxDDFastPathInit()
{
fx_init_fastpath( &fxFastTab[0] );
fx_init_fastpath_RGBA( &fxFastTab[SETUP_RGBA] );
fx_init_fastpath_TMU0( &fxFastTab[SETUP_TMU0] );
fx_init_fastpath_TMU1( &fxFastTab[SETUP_TMU1] );
fx_init_fastpath_RGBA_TMU0( &fxFastTab[SETUP_RGBA|SETUP_TMU0] );
fx_init_fastpath_RGBA_TMU1( &fxFastTab[SETUP_RGBA|SETUP_TMU1] );
fx_init_fastpath_TMU0_TMU1( &fxFastTab[SETUP_TMU0|SETUP_TMU1] );
fx_init_fastpath_RGBA_TMU0_TMU1( &fxFastTab[SETUP_RGBA|SETUP_TMU0|
SETUP_TMU1] );
}
void fxDDFastPath( struct vertex_buffer *VB )
{
GLcontext *ctx = VB->ctx;
GLenum prim = ctx->CVA.elt_mode;
struct tfxMesaContext *fxMesa = FX_CONTEXT(ctx);
struct fx_fast_tab *tab = &fxFastTab[fxMesa->setupindex & 0x7];
GLuint do_clip = 1;
struct tfxMesaVertexBuffer *fxVB = FX_DRIVER_DATA(VB);
#ifdef DRIVERTS
GLfloat tx, ty;
#endif
fxVertex *first;
GLfloat *mat = ctx->Viewport.WindowMap.m;
gl_prepare_arrays_cva( VB ); /* still need this */
if (VB->EltPtr->count * 12 > fxVB->size) {
fxDDResizeVB( VB, VB->EltPtr->count * 12 );
do_clip = 1;
}
tab->build_vertices( VB, do_clip ); /* object->clip space */
first = FX_DRIVER_DATA(VB)->verts;
#ifdef DRIVERTS
tx=mat[MAT_TX];
ty=mat[MAT_TY];
mat[MAT_TX]=tx+fxMesa->x_offset;
mat[MAT_TY]=ty+fxMesa->y_delta;
#endif
if (VB->ClipOrMask) {
if (!VB->ClipAndMask) {
GLubyte tmp = VB->ClipOrMask;
tab->clip[prim]( VB, 0, VB->EltPtr->count, 0 ); /* clip */
tab->project_clipped_vertices( fxVB->verts->f,
fxVB->last_vert->f,
mat, 16 * 4,
VB->ClipMask );
ctx->CVA.elt_mode = gl_reduce_prim[prim];
VB->EltPtr = &(FX_DRIVER_DATA(VB)->clipped_elements);
VB->ClipOrMask = 0;
fxDDRenderElementsDirect( VB ); /* render using new list */
VB->ClipOrMask = tmp;
}
} else {
tab->project_vertices( fxVB->verts->f,
fxVB->last_vert->f,
mat, 16 * 4 );
fxDDRenderElementsDirect( VB ); /* render using orig list */
}
#ifdef DRIVERTS
mat[MAT_TX]=tx;
mat[MAT_TY]=ty;
#endif
/* This indicates that there is no cached data to reuse.
*/
VB->pipeline->data_valid = 0;
VB->pipeline->pipeline_valid = 0;
}
#else
/*
* Need this to provide at least one external definition.
*/
int gl_fxfastpath_dummy(void)
{
return 0;
}
#endif
|
