aboutsummaryrefslogtreecommitdiff
path: root/mesalib/src/mesa/tnl/t_vertex.c
blob: 421bae2b81890382561c1343a8ed974fc67d2a4d (plain)
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
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
/*
 * Copyright 2003 VMware, Inc.
 * 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
 * on the rights to use, copy, modify, merge, publish, distribute, sub
 * license, 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 (including the next
 * paragraph) 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 NON-INFRINGEMENT.  IN NO EVENT SHALL
 * VMWARE AND/OR THEIR SUPPLIERS 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.
 *
 * Authors:
 *    Keith Whitwell <keithw@vmware.com>
 */

#include "main/glheader.h"
#include "main/context.h"
#include "main/colormac.h"
#include "swrast/s_chan.h"
#include "t_context.h"
#include "t_vertex.h"

#define DBG 0

/* Build and manage clipspace/ndc/window vertices.
 */

static GLboolean match_fastpath( struct tnl_clipspace *vtx,
				 const struct tnl_clipspace_fastpath *fp)
{
   GLuint j;

   if (vtx->attr_count != fp->attr_count) 
      return GL_FALSE;

   for (j = 0; j < vtx->attr_count; j++) 
      if (vtx->attr[j].format != fp->attr[j].format ||
	  vtx->attr[j].inputsize != fp->attr[j].size ||
	  vtx->attr[j].vertoffset != fp->attr[j].offset) 
	 return GL_FALSE;
      
   if (fp->match_strides) {
      if (vtx->vertex_size != fp->vertex_size)
	 return GL_FALSE;

      for (j = 0; j < vtx->attr_count; j++) 
	 if (vtx->attr[j].inputstride != fp->attr[j].stride) 
	    return GL_FALSE;
   }
   
   return GL_TRUE;
}

static GLboolean search_fastpath_emit( struct tnl_clipspace *vtx )
{
   struct tnl_clipspace_fastpath *fp = vtx->fastpath;

   for ( ; fp ; fp = fp->next) {
      if (match_fastpath(vtx, fp)) {
         vtx->emit = fp->func;
	 return GL_TRUE;
      }
   }

   return GL_FALSE;
}

void _tnl_register_fastpath( struct tnl_clipspace *vtx,
			     GLboolean match_strides )
{
   struct tnl_clipspace_fastpath *fastpath = CALLOC_STRUCT(tnl_clipspace_fastpath);
   GLuint i;

   if (fastpath == NULL) {
      _mesa_error_no_memory(__func__);
      return;
   }

   fastpath->vertex_size = vtx->vertex_size;
   fastpath->attr_count = vtx->attr_count;
   fastpath->match_strides = match_strides;
   fastpath->func = vtx->emit;
   fastpath->attr = malloc(vtx->attr_count * sizeof(fastpath->attr[0]));

   if (fastpath->attr == NULL) {
      free(fastpath);
      _mesa_error_no_memory(__func__);
      return;
   }

   for (i = 0; i < vtx->attr_count; i++) {
      fastpath->attr[i].format = vtx->attr[i].format;
      fastpath->attr[i].stride = vtx->attr[i].inputstride;
      fastpath->attr[i].size = vtx->attr[i].inputsize;
      fastpath->attr[i].offset = vtx->attr[i].vertoffset;
   }

   fastpath->next = vtx->fastpath;
   vtx->fastpath = fastpath;
}



/***********************************************************************
 * Build codegen functions or return generic ones:
 */
static void choose_emit_func( struct gl_context *ctx, GLuint count, GLubyte *dest)
{
   struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
   struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
   struct tnl_clipspace_attr *a = vtx->attr;
   const GLuint attr_count = vtx->attr_count;
   GLuint j;

   for (j = 0; j < attr_count; j++) {
      GLvector4f *vptr = VB->AttribPtr[a[j].attrib];
      a[j].inputstride = vptr->stride;
      a[j].inputsize = vptr->size;
      a[j].emit = a[j].insert[vptr->size - 1]; /* not always used */
   }

   vtx->emit = NULL;
   
   /* Does this match an existing (hardwired, codegen or known-bad)
    * fastpath?
    */
   if (search_fastpath_emit(vtx)) {
      /* Use this result.  If it is null, then it is already known
       * that the current state will fail for codegen and there is no
       * point trying again.
       */
   }
   else if (vtx->codegen_emit) {
      vtx->codegen_emit(ctx);
   }

   if (!vtx->emit) {
      _tnl_generate_hardwired_emit(ctx);
   }

   /* Otherwise use the generic version:
    */
   if (!vtx->emit)
      vtx->emit = _tnl_generic_emit;

   vtx->emit( ctx, count, dest );
}



static void choose_interp_func( struct gl_context *ctx,
				GLfloat t,
				GLuint edst, GLuint eout, GLuint ein,
				GLboolean force_boundary )
{
   struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
   GLboolean unfilled = (ctx->Polygon.FrontMode != GL_FILL ||
                         ctx->Polygon.BackMode != GL_FILL);
   GLboolean twosided = ctx->Light.Enabled && ctx->Light.Model.TwoSide;

   if (vtx->need_extras && (twosided || unfilled)) {
      vtx->interp = _tnl_generic_interp_extras;
   } else {
      vtx->interp = _tnl_generic_interp;
   }

   vtx->interp( ctx, t, edst, eout, ein, force_boundary );
}


static void choose_copy_pv_func(  struct gl_context *ctx, GLuint edst, GLuint esrc )
{
   struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
   GLboolean unfilled = (ctx->Polygon.FrontMode != GL_FILL ||
                         ctx->Polygon.BackMode != GL_FILL);

   GLboolean twosided = ctx->Light.Enabled && ctx->Light.Model.TwoSide;

   if (vtx->need_extras && (twosided || unfilled)) {
      vtx->copy_pv = _tnl_generic_copy_pv_extras;
   } else {
      vtx->copy_pv = _tnl_generic_copy_pv;
   }

   vtx->copy_pv( ctx, edst, esrc );
}


/***********************************************************************
 * Public entrypoints, mostly dispatch to the above:
 */


/* Interpolate between two vertices to produce a third:
 */
void _tnl_interp( struct gl_context *ctx,
		  GLfloat t,
		  GLuint edst, GLuint eout, GLuint ein,
		  GLboolean force_boundary )
{
   struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
   vtx->interp( ctx, t, edst, eout, ein, force_boundary );
}

/* Copy colors from one vertex to another:
 */
void _tnl_copy_pv(  struct gl_context *ctx, GLuint edst, GLuint esrc )
{
   struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
   vtx->copy_pv( ctx, edst, esrc );
}


/* Extract a named attribute from a hardware vertex.  Will have to
 * reverse any viewport transformation, swizzling or other conversions
 * which may have been applied:
 */
void _tnl_get_attr( struct gl_context *ctx, const void *vin,
			      GLenum attr, GLfloat *dest )
{
   struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
   const struct tnl_clipspace_attr *a = vtx->attr;
   const GLuint attr_count = vtx->attr_count;
   GLuint j;

   for (j = 0; j < attr_count; j++) {
      if (a[j].attrib == attr) {
	 a[j].extract( &a[j], dest, (GLubyte *)vin + a[j].vertoffset );
	 return;
      }
   }

   /* Else return the value from ctx->Current.
    */
   if (attr == _TNL_ATTRIB_POINTSIZE) {
      /* If the hardware vertex doesn't have point size then use size from
       * struct gl_context.  XXX this will be wrong if drawing attenuated points!
       */
      dest[0] = ctx->Point.Size;
   }
   else {
      memcpy( dest, ctx->Current.Attrib[attr], 4*sizeof(GLfloat));
   }
}


/* Complementary operation to the above.
 */
void _tnl_set_attr( struct gl_context *ctx, void *vout,
		    GLenum attr, const GLfloat *src )
{
   struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
   const struct tnl_clipspace_attr *a = vtx->attr;
   const GLuint attr_count = vtx->attr_count;
   GLuint j;

   for (j = 0; j < attr_count; j++) {
      if (a[j].attrib == attr) {
	 a[j].insert[4-1]( &a[j], (GLubyte *)vout + a[j].vertoffset, src );
	 return;
      }
   }
}


void *_tnl_get_vertex( struct gl_context *ctx, GLuint nr )
{
   struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);

   return vtx->vertex_buf + nr * vtx->vertex_size;
}

void _tnl_invalidate_vertex_state( struct gl_context *ctx, GLuint new_state )
{
   /* if two-sided lighting changes or filled/unfilled polygon state changes */
   if (new_state & (_NEW_LIGHT | _NEW_POLYGON) ) {
      struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
      vtx->new_inputs = ~0;
      vtx->interp = choose_interp_func;
      vtx->copy_pv = choose_copy_pv_func;
   }
}

static void invalidate_funcs( struct tnl_clipspace *vtx )
{
   vtx->emit = choose_emit_func;
   vtx->interp = choose_interp_func;
   vtx->copy_pv = choose_copy_pv_func;
   vtx->new_inputs = ~0;
}

GLuint _tnl_install_attrs( struct gl_context *ctx, const struct tnl_attr_map *map,
			   GLuint nr, const GLfloat *vp, 
			   GLuint unpacked_size )
{
   struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
   GLuint offset = 0;
   GLuint i, j;

   assert(nr < _TNL_ATTRIB_MAX);
   assert(nr == 0 || map[0].attrib == VERT_ATTRIB_POS);

   vtx->new_inputs = ~0;
   vtx->need_viewport = GL_FALSE;

   if (vp) {
      vtx->need_viewport = GL_TRUE;
   }

   for (j = 0, i = 0; i < nr; i++) {
      const GLuint format = map[i].format;
      if (format == EMIT_PAD) {
	 if (DBG)
	    printf("%d: pad %d, offset %d\n", i,  
		   map[i].offset, offset);  

	 offset += map[i].offset;

      }
      else {
	 GLuint tmpoffset;

	 if (unpacked_size) 
	    tmpoffset = map[i].offset;
	 else
	    tmpoffset = offset;

	 if (vtx->attr_count != j ||
	     vtx->attr[j].attrib != map[i].attrib ||
	     vtx->attr[j].format != format ||
	     vtx->attr[j].vertoffset != tmpoffset) {
	    invalidate_funcs(vtx);

	    vtx->attr[j].attrib = map[i].attrib;
	    vtx->attr[j].format = format;
	    vtx->attr[j].vp = vp;
	    vtx->attr[j].insert = _tnl_format_info[format].insert;
	    vtx->attr[j].extract = _tnl_format_info[format].extract;
	    vtx->attr[j].vertattrsize = _tnl_format_info[format].attrsize;
	    vtx->attr[j].vertoffset = tmpoffset;
	 }

	 
	 if (DBG)
	    printf("%d: %s, vp %p, offset %d\n", i,  
		   _tnl_format_info[format].name, (void *)vp,
		   vtx->attr[j].vertoffset);   

	 offset += _tnl_format_info[format].attrsize;
	 j++;
      }
   }

   vtx->attr_count = j;

   if (unpacked_size)
      vtx->vertex_size = unpacked_size;
   else
      vtx->vertex_size = offset;

   assert(vtx->vertex_size <= vtx->max_vertex_size);
   return vtx->vertex_size;
}



void _tnl_invalidate_vertices( struct gl_context *ctx, GLuint newinputs )
{
   struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
   vtx->new_inputs |= newinputs;
}


/* This event has broader use beyond this file - will move elsewhere
 * and probably invoke a driver callback.
 */
void _tnl_notify_pipeline_output_change( struct gl_context *ctx )
{
   struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
   invalidate_funcs(vtx);
}


static void adjust_input_ptrs( struct gl_context *ctx, GLint diff)
{
   struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
   struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
   struct tnl_clipspace_attr *a = vtx->attr;
   const GLuint count = vtx->attr_count;
   GLuint j;

   diff -= 1;
   for (j=0; j<count; ++j) {
           register GLvector4f *vptr = VB->AttribPtr[a->attrib];
	   (a++)->inputptr += diff*vptr->stride;
   }
}

static void update_input_ptrs( struct gl_context *ctx, GLuint start )
{
   struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
   struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
   struct tnl_clipspace_attr *a = vtx->attr;
   const GLuint count = vtx->attr_count;
   GLuint j;
   
   for (j = 0; j < count; j++) {
      GLvector4f *vptr = VB->AttribPtr[a[j].attrib];

      if (vtx->emit != choose_emit_func) {
	 assert(a[j].inputstride == vptr->stride);
	 assert(a[j].inputsize == vptr->size);
      }

      a[j].inputptr = ((GLubyte *)vptr->data) + start * vptr->stride;
   }
   
   if (a->vp) {
      vtx->vp_scale[0] = a->vp[MAT_SX];
      vtx->vp_scale[1] = a->vp[MAT_SY];
      vtx->vp_scale[2] = a->vp[MAT_SZ];
      vtx->vp_scale[3] = 1.0;
      vtx->vp_xlate[0] = a->vp[MAT_TX];
      vtx->vp_xlate[1] = a->vp[MAT_TY];
      vtx->vp_xlate[2] = a->vp[MAT_TZ];
      vtx->vp_xlate[3] = 0.0;
   }
}


void _tnl_build_vertices( struct gl_context *ctx,
			  GLuint start,
			  GLuint end,
			  GLuint newinputs )
{
   struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);  
   update_input_ptrs( ctx, start );      
   vtx->emit( ctx, end - start, 
	      (GLubyte *)(vtx->vertex_buf + 
			  start * vtx->vertex_size));
}

/* Emit VB vertices start..end to dest.  Note that VB vertex at
 * postion start will be emitted to dest at position zero.
 */
void *_tnl_emit_vertices_to_buffer( struct gl_context *ctx,
				    GLuint start,
				    GLuint end,
				    void *dest )
{
   struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);

   update_input_ptrs(ctx, start);
   /* Note: dest should not be adjusted for non-zero 'start' values:
    */
   vtx->emit( ctx, end - start, (GLubyte*) dest );	
   return (void *)((GLubyte *)dest + vtx->vertex_size * (end - start));
}

/* Emit indexed VB vertices start..end to dest.  Note that VB vertex at
 * postion start will be emitted to dest at position zero.
 */

void *_tnl_emit_indexed_vertices_to_buffer( struct gl_context *ctx,
					    const GLuint *elts,
					    GLuint start,
					    GLuint end,
					    void *dest )
{
   struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
   GLuint oldIndex;
   GLubyte *cdest = dest;

   update_input_ptrs(ctx, oldIndex = elts[start++]);
   vtx->emit( ctx, 1, cdest );
   cdest += vtx->vertex_size;

   for (; start < end; ++start) {
      adjust_input_ptrs(ctx, elts[start] - oldIndex);
      oldIndex = elts[start];
      vtx->emit( ctx, 1, cdest);
      cdest += vtx->vertex_size;
   }

   return (void *) cdest;
}


void _tnl_init_vertices( struct gl_context *ctx, 
			GLuint vb_size,
			GLuint max_vertex_size )
{
   struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);  

   _tnl_install_attrs( ctx, NULL, 0, NULL, 0 );

   vtx->need_extras = GL_TRUE;
   if (max_vertex_size > vtx->max_vertex_size) {
      _tnl_free_vertices( ctx );
      vtx->max_vertex_size = max_vertex_size;
      vtx->vertex_buf = _mesa_align_calloc(vb_size * max_vertex_size, 32 );
      invalidate_funcs(vtx);
   }

   switch(CHAN_TYPE) {
   case GL_UNSIGNED_BYTE:
      vtx->chan_scale[0] = 255.0;
      vtx->chan_scale[1] = 255.0;
      vtx->chan_scale[2] = 255.0;
      vtx->chan_scale[3] = 255.0;
      break;
   case GL_UNSIGNED_SHORT:
      vtx->chan_scale[0] = 65535.0;
      vtx->chan_scale[1] = 65535.0;
      vtx->chan_scale[2] = 65535.0;
      vtx->chan_scale[3] = 65535.0;
      break;
   default:
      vtx->chan_scale[0] = 1.0;
      vtx->chan_scale[1] = 1.0;
      vtx->chan_scale[2] = 1.0;
      vtx->chan_scale[3] = 1.0;
      break;
   }

   vtx->identity[0] = 0.0;
   vtx->identity[1] = 0.0;
   vtx->identity[2] = 0.0;
   vtx->identity[3] = 1.0;

   vtx->codegen_emit = NULL;

#ifdef USE_SSE_ASM
   if (!_mesa_getenv("MESA_NO_CODEGEN"))
      vtx->codegen_emit = _tnl_generate_sse_emit;
#endif
}


void _tnl_free_vertices( struct gl_context *ctx )
{
   TNLcontext *tnl = TNL_CONTEXT(ctx);
   if (tnl) {
      struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
      struct tnl_clipspace_fastpath *fp, *tmp;

      _mesa_align_free(vtx->vertex_buf);
      vtx->vertex_buf = NULL;

      for (fp = vtx->fastpath ; fp ; fp = tmp) {
         tmp = fp->next;
         free(fp->attr);

         /* KW: At the moment, fp->func is constrained to be allocated by
          * _mesa_exec_alloc(), as the hardwired fastpaths in
          * t_vertex_generic.c are handled specially.  It would be nice
          * to unify them, but this probably won't change until this
          * module gets another overhaul.
          */
         _mesa_exec_free((void *) fp->func);
         free(fp);
      }

      vtx->fastpath = NULL;
   }
}