st_draw.c revision 50caff5675888c0063c73fa64b88129db7aa11dd 
1/**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28/*
29 * This file implements the st_draw_vbo() function which is called from
30 * Mesa's VBO module.  All point/line/triangle rendering is done through
31 * this function whether the user called glBegin/End, glDrawArrays,
32 * glDrawElements, glEvalMesh, or glCalList, etc.
33 *
34 * We basically convert the VBO's vertex attribute/array information into
35 * Gallium vertex state, bind the vertex buffer objects and call
36 * pipe->draw_elements(), pipe->draw_range_elements() or pipe->draw_arrays().
37 *
38 * Authors:
39 *   Keith Whitwell <keith@tungstengraphics.com>
40 */
41
42
43#include "main/imports.h"
44#include "main/image.h"
45#include "main/macros.h"
46#include "shader/prog_uniform.h"
47
48#include "vbo/vbo.h"
49
50#include "st_context.h"
51#include "st_atom.h"
52#include "st_cb_bufferobjects.h"
53#include "st_draw.h"
54#include "st_program.h"
55
56#include "pipe/p_context.h"
57#include "pipe/p_defines.h"
58#include "pipe/p_inlines.h"
59
60
61static GLuint double_types[4] = {
62   PIPE_FORMAT_R64_FLOAT,
63   PIPE_FORMAT_R64G64_FLOAT,
64   PIPE_FORMAT_R64G64B64_FLOAT,
65   PIPE_FORMAT_R64G64B64A64_FLOAT
66};
67
68static GLuint float_types[4] = {
69   PIPE_FORMAT_R32_FLOAT,
70   PIPE_FORMAT_R32G32_FLOAT,
71   PIPE_FORMAT_R32G32B32_FLOAT,
72   PIPE_FORMAT_R32G32B32A32_FLOAT
73};
74
75static GLuint uint_types_norm[4] = {
76   PIPE_FORMAT_R32_UNORM,
77   PIPE_FORMAT_R32G32_UNORM,
78   PIPE_FORMAT_R32G32B32_UNORM,
79   PIPE_FORMAT_R32G32B32A32_UNORM
80};
81
82static GLuint uint_types_scale[4] = {
83   PIPE_FORMAT_R32_USCALED,
84   PIPE_FORMAT_R32G32_USCALED,
85   PIPE_FORMAT_R32G32B32_USCALED,
86   PIPE_FORMAT_R32G32B32A32_USCALED
87};
88
89static GLuint int_types_norm[4] = {
90   PIPE_FORMAT_R32_SNORM,
91   PIPE_FORMAT_R32G32_SNORM,
92   PIPE_FORMAT_R32G32B32_SNORM,
93   PIPE_FORMAT_R32G32B32A32_SNORM
94};
95
96static GLuint int_types_scale[4] = {
97   PIPE_FORMAT_R32_SSCALED,
98   PIPE_FORMAT_R32G32_SSCALED,
99   PIPE_FORMAT_R32G32B32_SSCALED,
100   PIPE_FORMAT_R32G32B32A32_SSCALED
101};
102
103static GLuint ushort_types_norm[4] = {
104   PIPE_FORMAT_R16_UNORM,
105   PIPE_FORMAT_R16G16_UNORM,
106   PIPE_FORMAT_R16G16B16_UNORM,
107   PIPE_FORMAT_R16G16B16A16_UNORM
108};
109
110static GLuint ushort_types_scale[4] = {
111   PIPE_FORMAT_R16_USCALED,
112   PIPE_FORMAT_R16G16_USCALED,
113   PIPE_FORMAT_R16G16B16_USCALED,
114   PIPE_FORMAT_R16G16B16A16_USCALED
115};
116
117static GLuint short_types_norm[4] = {
118   PIPE_FORMAT_R16_SNORM,
119   PIPE_FORMAT_R16G16_SNORM,
120   PIPE_FORMAT_R16G16B16_SNORM,
121   PIPE_FORMAT_R16G16B16A16_SNORM
122};
123
124static GLuint short_types_scale[4] = {
125   PIPE_FORMAT_R16_SSCALED,
126   PIPE_FORMAT_R16G16_SSCALED,
127   PIPE_FORMAT_R16G16B16_SSCALED,
128   PIPE_FORMAT_R16G16B16A16_SSCALED
129};
130
131static GLuint ubyte_types_norm[4] = {
132   PIPE_FORMAT_R8_UNORM,
133   PIPE_FORMAT_R8G8_UNORM,
134   PIPE_FORMAT_R8G8B8_UNORM,
135   PIPE_FORMAT_R8G8B8A8_UNORM
136};
137
138static GLuint ubyte_types_scale[4] = {
139   PIPE_FORMAT_R8_USCALED,
140   PIPE_FORMAT_R8G8_USCALED,
141   PIPE_FORMAT_R8G8B8_USCALED,
142   PIPE_FORMAT_R8G8B8A8_USCALED
143};
144
145static GLuint byte_types_norm[4] = {
146   PIPE_FORMAT_R8_SNORM,
147   PIPE_FORMAT_R8G8_SNORM,
148   PIPE_FORMAT_R8G8B8_SNORM,
149   PIPE_FORMAT_R8G8B8A8_SNORM
150};
151
152static GLuint byte_types_scale[4] = {
153   PIPE_FORMAT_R8_SSCALED,
154   PIPE_FORMAT_R8G8_SSCALED,
155   PIPE_FORMAT_R8G8B8_SSCALED,
156   PIPE_FORMAT_R8G8B8A8_SSCALED
157};
158
159static GLuint fixed_types[4] = {
160   PIPE_FORMAT_R32_FIXED,
161   PIPE_FORMAT_R32G32_FIXED,
162   PIPE_FORMAT_R32G32B32_FIXED,
163   PIPE_FORMAT_R32G32B32A32_FIXED
164};
165
166
167
168/**
169 * Return a PIPE_FORMAT_x for the given GL datatype and size.
170 */
171GLuint
172st_pipe_vertex_format(GLenum type, GLuint size, GLenum format,
173                      GLboolean normalized)
174{
175   assert((type >= GL_BYTE && type <= GL_DOUBLE) ||
176          type == GL_FIXED);
177   assert(size >= 1);
178   assert(size <= 4);
179   assert(format == GL_RGBA || format == GL_BGRA);
180
181   if (format == GL_BGRA) {
182      /* this is an odd-ball case */
183      assert(type == GL_UNSIGNED_BYTE);
184      assert(normalized);
185      return PIPE_FORMAT_B8G8R8A8_UNORM;
186   }
187
188   if (normalized) {
189      switch (type) {
190      case GL_DOUBLE: return double_types[size-1];
191      case GL_FLOAT: return float_types[size-1];
192      case GL_INT: return int_types_norm[size-1];
193      case GL_SHORT: return short_types_norm[size-1];
194      case GL_BYTE: return byte_types_norm[size-1];
195      case GL_UNSIGNED_INT: return uint_types_norm[size-1];
196      case GL_UNSIGNED_SHORT: return ushort_types_norm[size-1];
197      case GL_UNSIGNED_BYTE: return ubyte_types_norm[size-1];
198      case GL_FIXED: return fixed_types[size-1];
199      default: assert(0); return 0;
200      }
201   }
202   else {
203      switch (type) {
204      case GL_DOUBLE: return double_types[size-1];
205      case GL_FLOAT: return float_types[size-1];
206      case GL_INT: return int_types_scale[size-1];
207      case GL_SHORT: return short_types_scale[size-1];
208      case GL_BYTE: return byte_types_scale[size-1];
209      case GL_UNSIGNED_INT: return uint_types_scale[size-1];
210      case GL_UNSIGNED_SHORT: return ushort_types_scale[size-1];
211      case GL_UNSIGNED_BYTE: return ubyte_types_scale[size-1];
212      case GL_FIXED: return fixed_types[size-1];
213      default: assert(0); return 0;
214      }
215   }
216   return 0; /* silence compiler warning */
217}
218
219
220
221
222
223/**
224 * Examine the active arrays to determine if we have interleaved
225 * vertex arrays all living in one VBO, or all living in user space.
226 * \param userSpace  returns whether the arrays are in user space.
227 */
228static GLboolean
229is_interleaved_arrays(const struct st_vertex_program *vp,
230                      const struct st_vp_varient *vpv,
231                      const struct gl_client_array **arrays,
232                      GLboolean *userSpace)
233{
234   GLuint attr;
235   const struct gl_buffer_object *firstBufObj = NULL;
236   GLint firstStride = -1;
237   GLuint num_client_arrays = 0;
238   const GLubyte *client_addr = NULL;
239
240   for (attr = 0; attr < vpv->num_inputs; attr++) {
241      const GLuint mesaAttr = vp->index_to_input[attr];
242      const struct gl_buffer_object *bufObj = arrays[mesaAttr]->BufferObj;
243      const GLsizei stride = arrays[mesaAttr]->StrideB; /* in bytes */
244
245      if (firstStride < 0) {
246         firstStride = stride;
247      }
248      else if (firstStride != stride) {
249         return GL_FALSE;
250      }
251
252      if (!bufObj || !bufObj->Name) {
253         num_client_arrays++;
254         /* Try to detect if the client-space arrays are
255          * "close" to each other.
256          */
257         if (!client_addr) {
258            client_addr = arrays[mesaAttr]->Ptr;
259         }
260         else if (abs(arrays[mesaAttr]->Ptr - client_addr) > firstStride) {
261            /* arrays start too far apart */
262            return GL_FALSE;
263         }
264      }
265      else if (!firstBufObj) {
266         firstBufObj = bufObj;
267      }
268      else if (bufObj != firstBufObj) {
269         return GL_FALSE;
270      }
271   }
272
273   *userSpace = (num_client_arrays == vpv->num_inputs);
274   /* printf("user space: %d (%d %d)\n", (int) *userSpace,num_client_arrays,vp->num_inputs); */
275
276   return GL_TRUE;
277}
278
279
280/**
281 * Compute the memory range occupied by the arrays.
282 */
283static void
284get_arrays_bounds(const struct st_vertex_program *vp,
285                  const struct st_vp_varient *vpv,
286                  const struct gl_client_array **arrays,
287                  GLuint max_index,
288                  const GLubyte **low, const GLubyte **high)
289{
290   const GLubyte *low_addr = NULL;
291   const GLubyte *high_addr = NULL;
292   GLuint attr;
293
294   for (attr = 0; attr < vpv->num_inputs; attr++) {
295      const GLuint mesaAttr = vp->index_to_input[attr];
296      const GLint stride = arrays[mesaAttr]->StrideB;
297      const GLubyte *start = arrays[mesaAttr]->Ptr;
298      const unsigned sz = (arrays[mesaAttr]->Size *
299                           _mesa_sizeof_type(arrays[mesaAttr]->Type));
300      const GLubyte *end = start + (max_index * stride) + sz;
301
302      if (attr == 0) {
303         low_addr = start;
304         high_addr = end;
305      }
306      else {
307         low_addr = MIN2(low_addr, start);
308         high_addr = MAX2(high_addr, end);
309      }
310   }
311
312   *low = low_addr;
313   *high = high_addr;
314}
315
316
317/**
318 * Set up for drawing interleaved arrays that all live in one VBO
319 * or all live in user space.
320 * \param vbuffer  returns vertex buffer info
321 * \param velements  returns vertex element info
322 */
323static void
324setup_interleaved_attribs(GLcontext *ctx,
325                          const struct st_vertex_program *vp,
326                          const struct st_vp_varient *vpv,
327                          const struct gl_client_array **arrays,
328                          GLuint max_index,
329                          GLboolean userSpace,
330                          struct pipe_vertex_buffer *vbuffer,
331                          struct pipe_vertex_element velements[])
332{
333   struct pipe_context *pipe = ctx->st->pipe;
334   GLuint attr;
335   const GLubyte *offset0;
336
337   for (attr = 0; attr < vpv->num_inputs; attr++) {
338      const GLuint mesaAttr = vp->index_to_input[attr];
339      struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
340      struct st_buffer_object *stobj = st_buffer_object(bufobj);
341      GLsizei stride = arrays[mesaAttr]->StrideB;
342
343      /*printf("stobj %u = %p\n", attr, (void*)stobj);*/
344
345      if (attr == 0) {
346         const GLubyte *low, *high;
347
348         get_arrays_bounds(vp, vpv, arrays, max_index, &low, &high);
349         /*printf("buffer range: %p %p  %d\n", low, high, high-low);*/
350
351         offset0 = low;
352         if (userSpace) {
353            vbuffer->buffer =
354               pipe_user_buffer_create(pipe->screen, (void *) low, high - low);
355            vbuffer->buffer_offset = 0;
356         }
357         else {
358            vbuffer->buffer = NULL;
359            pipe_buffer_reference(&vbuffer->buffer, stobj->buffer);
360            vbuffer->buffer_offset = pointer_to_offset(low);
361         }
362         vbuffer->stride = stride; /* in bytes */
363         vbuffer->max_index = max_index;
364      }
365
366      velements[attr].src_offset =
367         (unsigned) (arrays[mesaAttr]->Ptr - offset0);
368      velements[attr].vertex_buffer_index = 0;
369      velements[attr].nr_components = arrays[mesaAttr]->Size;
370      velements[attr].src_format =
371         st_pipe_vertex_format(arrays[mesaAttr]->Type,
372                               arrays[mesaAttr]->Size,
373                               arrays[mesaAttr]->Format,
374                               arrays[mesaAttr]->Normalized);
375      assert(velements[attr].src_format);
376   }
377}
378
379
380/**
381 * Set up a separate pipe_vertex_buffer and pipe_vertex_element for each
382 * vertex attribute.
383 * \param vbuffer  returns vertex buffer info
384 * \param velements  returns vertex element info
385 */
386static void
387setup_non_interleaved_attribs(GLcontext *ctx,
388                              const struct st_vertex_program *vp,
389                              const struct st_vp_varient *vpv,
390                              const struct gl_client_array **arrays,
391                              GLuint max_index,
392                              GLboolean *userSpace,
393                              struct pipe_vertex_buffer vbuffer[],
394                              struct pipe_vertex_element velements[])
395{
396   struct pipe_context *pipe = ctx->st->pipe;
397   GLuint attr;
398
399   for (attr = 0; attr < vpv->num_inputs; attr++) {
400      const GLuint mesaAttr = vp->index_to_input[attr];
401      struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
402      GLsizei stride = arrays[mesaAttr]->StrideB;
403
404      *userSpace = GL_FALSE;
405
406      if (bufobj && bufobj->Name) {
407         /* Attribute data is in a VBO.
408          * Recall that for VBOs, the gl_client_array->Ptr field is
409          * really an offset from the start of the VBO, not a pointer.
410          */
411         struct st_buffer_object *stobj = st_buffer_object(bufobj);
412         assert(stobj->buffer);
413         /*printf("stobj %u = %p\n", attr, (void*) stobj);*/
414
415         vbuffer[attr].buffer = NULL;
416         pipe_buffer_reference(&vbuffer[attr].buffer, stobj->buffer);
417         vbuffer[attr].buffer_offset = pointer_to_offset(arrays[mesaAttr]->Ptr);
418         velements[attr].src_offset = 0;
419      }
420      else {
421         /* attribute data is in user-space memory, not a VBO */
422         uint bytes;
423         /*printf("user-space array %d stride %d\n", attr, stride);*/
424
425         *userSpace = GL_TRUE;
426
427         /* wrap user data */
428         if (arrays[mesaAttr]->Ptr) {
429            /* user's vertex array */
430            if (arrays[mesaAttr]->StrideB) {
431               bytes = arrays[mesaAttr]->StrideB * (max_index + 1);
432            }
433            else {
434               bytes = arrays[mesaAttr]->Size
435                  * _mesa_sizeof_type(arrays[mesaAttr]->Type);
436            }
437            vbuffer[attr].buffer = pipe_user_buffer_create(pipe->screen,
438                           (void *) arrays[mesaAttr]->Ptr, bytes);
439         }
440         else {
441            /* no array, use ctx->Current.Attrib[] value */
442            bytes = sizeof(ctx->Current.Attrib[0]);
443            vbuffer[attr].buffer = pipe_user_buffer_create(pipe->screen,
444                           (void *) ctx->Current.Attrib[mesaAttr], bytes);
445            stride = 0;
446         }
447
448         vbuffer[attr].buffer_offset = 0;
449         velements[attr].src_offset = 0;
450      }
451
452      assert(velements[attr].src_offset <= 2048); /* 11-bit field */
453
454      /* common-case setup */
455      vbuffer[attr].stride = stride; /* in bytes */
456      vbuffer[attr].max_index = max_index;
457      velements[attr].vertex_buffer_index = attr;
458      velements[attr].nr_components = arrays[mesaAttr]->Size;
459      velements[attr].src_format
460         = st_pipe_vertex_format(arrays[mesaAttr]->Type,
461                                 arrays[mesaAttr]->Size,
462                                 arrays[mesaAttr]->Format,
463                                 arrays[mesaAttr]->Normalized);
464      assert(velements[attr].src_format);
465   }
466}
467
468
469
470/**
471 * Prior to drawing, check that any uniforms referenced by the
472 * current shader have been set.  If a uniform has not been set,
473 * issue a warning.
474 */
475static void
476check_uniforms(GLcontext *ctx)
477{
478   const struct gl_shader_program *shProg = ctx->Shader.CurrentProgram;
479   if (shProg && shProg->LinkStatus) {
480      GLuint i;
481      for (i = 0; i < shProg->Uniforms->NumUniforms; i++) {
482         const struct gl_uniform *u = &shProg->Uniforms->Uniforms[i];
483         if (!u->Initialized) {
484            _mesa_warning(ctx,
485                          "Using shader with uninitialized uniform: %s",
486                          u->Name);
487         }
488      }
489   }
490}
491
492
493/**
494 * This function gets plugged into the VBO module and is called when
495 * we have something to render.
496 * Basically, translate the information into the format expected by gallium.
497 */
498void
499st_draw_vbo(GLcontext *ctx,
500            const struct gl_client_array **arrays,
501            const struct _mesa_prim *prims,
502            GLuint nr_prims,
503            const struct _mesa_index_buffer *ib,
504	    GLboolean index_bounds_valid,
505            GLuint min_index,
506            GLuint max_index)
507{
508   struct pipe_context *pipe = ctx->st->pipe;
509   const struct st_vertex_program *vp;
510   const struct st_vp_varient *vpv;
511   const struct pipe_shader_state *vs;
512   struct pipe_vertex_buffer vbuffer[PIPE_MAX_SHADER_INPUTS];
513   GLuint attr;
514   struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
515   unsigned num_vbuffers, num_velements;
516   GLboolean userSpace;
517
518   /* Gallium probably doesn't want this in some cases. */
519   if (!index_bounds_valid)
520      vbo_get_minmax_index(ctx, prims, ib, &min_index, &max_index);
521
522   /* sanity check for pointer arithmetic below */
523   assert(sizeof(arrays[0]->Ptr[0]) == 1);
524
525   st_validate_state(ctx->st);
526
527   /* must get these after state validation! */
528   vp = ctx->st->vp;
529   vpv = ctx->st->vp_varient;
530   vs = &vpv->state;
531
532#if 0
533   if (MESA_VERBOSE & VERBOSE_GLSL) {
534      check_uniforms(ctx);
535   }
536#else
537   (void) check_uniforms;
538#endif
539
540   /*
541    * Setup the vbuffer[] and velements[] arrays.
542    */
543   if (is_interleaved_arrays(vp, vpv, arrays, &userSpace)) {
544      /*printf("Draw interleaved\n");*/
545      setup_interleaved_attribs(ctx, vp, vpv, arrays, max_index, userSpace,
546                                vbuffer, velements);
547      num_vbuffers = 1;
548      num_velements = vpv->num_inputs;
549      if (num_velements == 0)
550         num_vbuffers = 0;
551   }
552   else {
553      /*printf("Draw non-interleaved\n");*/
554      setup_non_interleaved_attribs(ctx, vp, vpv, arrays, max_index,
555                                    &userSpace, vbuffer, velements);
556      num_vbuffers = vpv->num_inputs;
557      num_velements = vpv->num_inputs;
558   }
559
560#if 0
561   {
562      GLuint i;
563      for (i = 0; i < num_vbuffers; i++) {
564         printf("buffers[%d].stride = %u\n", i, vbuffer[i].stride);
565         printf("buffers[%d].max_index = %u\n", i, vbuffer[i].max_index);
566         printf("buffers[%d].buffer_offset = %u\n", i, vbuffer[i].buffer_offset);
567         printf("buffers[%d].buffer = %p\n", i, (void*) vbuffer[i].buffer);
568      }
569      for (i = 0; i < num_velements; i++) {
570         printf("vlements[%d].vbuffer_index = %u\n", i, velements[i].vertex_buffer_index);
571         printf("vlements[%d].src_offset = %u\n", i, velements[i].src_offset);
572         printf("vlements[%d].nr_comps = %u\n", i, velements[i].nr_components);
573         printf("vlements[%d].format = %s\n", i, pf_name(velements[i].src_format));
574      }
575   }
576#endif
577
578   pipe->set_vertex_buffers(pipe, num_vbuffers, vbuffer);
579   pipe->set_vertex_elements(pipe, num_velements, velements);
580
581   if (num_vbuffers == 0 || num_velements == 0)
582      return;
583
584   /* do actual drawing */
585   if (ib) {
586      /* indexed primitive */
587      struct gl_buffer_object *bufobj = ib->obj;
588      struct pipe_buffer *indexBuf = NULL;
589      unsigned indexSize, indexOffset, i;
590
591      switch (ib->type) {
592      case GL_UNSIGNED_INT:
593         indexSize = 4;
594         break;
595      case GL_UNSIGNED_SHORT:
596         indexSize = 2;
597         break;
598      case GL_UNSIGNED_BYTE:
599         indexSize = 1;
600         break;
601      default:
602         assert(0);
603	 return;
604      }
605
606      /* get/create the index buffer object */
607      if (bufobj && bufobj->Name) {
608         /* elements/indexes are in a real VBO */
609         struct st_buffer_object *stobj = st_buffer_object(bufobj);
610         pipe_buffer_reference(&indexBuf, stobj->buffer);
611         indexOffset = pointer_to_offset(ib->ptr) / indexSize;
612      }
613      else {
614         /* element/indicies are in user space memory */
615         indexBuf = pipe_user_buffer_create(pipe->screen, (void *) ib->ptr,
616                                            ib->count * indexSize);
617         indexOffset = 0;
618      }
619
620      /* draw */
621      if (nr_prims == 1 && pipe->draw_range_elements != NULL) {
622         i = 0;
623
624         /* XXX: exercise temporary path to pass min/max directly
625          * through to driver & draw module.  These interfaces still
626          * need a bit of work...
627          */
628         pipe->draw_range_elements(pipe, indexBuf, indexSize,
629                                   min_index,
630                                   max_index,
631                                   prims[i].mode,
632                                   prims[i].start + indexOffset, prims[i].count);
633      }
634      else {
635         for (i = 0; i < nr_prims; i++) {
636            pipe->draw_elements(pipe, indexBuf, indexSize,
637                                prims[i].mode,
638                                prims[i].start + indexOffset, prims[i].count);
639         }
640      }
641
642      pipe_buffer_reference(&indexBuf, NULL);
643   }
644   else {
645      /* non-indexed */
646      GLuint i;
647      for (i = 0; i < nr_prims; i++) {
648         pipe->draw_arrays(pipe, prims[i].mode, prims[i].start, prims[i].count);
649      }
650   }
651
652   /* unreference buffers (frees wrapped user-space buffer objects) */
653   for (attr = 0; attr < num_vbuffers; attr++) {
654      pipe_buffer_reference(&vbuffer[attr].buffer, NULL);
655      assert(!vbuffer[attr].buffer);
656   }
657
658   if (userSpace)
659   {
660      pipe->set_vertex_buffers(pipe, 0, NULL);
661   }
662}
663
664
665void st_init_draw( struct st_context *st )
666{
667   GLcontext *ctx = st->ctx;
668
669   vbo_set_draw_func(ctx, st_draw_vbo);
670}
671
672
673void st_destroy_draw( struct st_context *st )
674{
675}
676
677
678