st_draw.c revision 1213c7257335d577cf0217e34edafddf0451ba1b 
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  * Authors:
30  *   Keith Whitwell <keith@tungstengraphics.com>
31  */
32
33#include "main/imports.h"
34#include "main/image.h"
35
36#include "vbo/vbo.h"
37
38#include "st_atom.h"
39#include "st_context.h"
40#include "st_cb_bufferobjects.h"
41#include "st_draw.h"
42#include "st_program.h"
43
44#include "pipe/p_context.h"
45#include "pipe/p_defines.h"
46#include "pipe/p_winsys.h"
47#include "pipe/p_inlines.h"
48
49#include "draw/draw_private.h"
50#include "draw/draw_context.h"
51
52
53static GLuint double_types[4] = {
54   PIPE_FORMAT_R64_FLOAT,
55   PIPE_FORMAT_R64G64_FLOAT,
56   PIPE_FORMAT_R64G64B64_FLOAT,
57   PIPE_FORMAT_R64G64B64A64_FLOAT
58};
59
60static GLuint float_types[4] = {
61   PIPE_FORMAT_R32_FLOAT,
62   PIPE_FORMAT_R32G32_FLOAT,
63   PIPE_FORMAT_R32G32B32_FLOAT,
64   PIPE_FORMAT_R32G32B32A32_FLOAT
65};
66
67static GLuint uint_types_norm[4] = {
68   PIPE_FORMAT_R32_UNORM,
69   PIPE_FORMAT_R32G32_UNORM,
70   PIPE_FORMAT_R32G32B32_UNORM,
71   PIPE_FORMAT_R32G32B32A32_UNORM
72};
73
74static GLuint uint_types_scale[4] = {
75   PIPE_FORMAT_R32_USCALED,
76   PIPE_FORMAT_R32G32_USCALED,
77   PIPE_FORMAT_R32G32B32_USCALED,
78   PIPE_FORMAT_R32G32B32A32_USCALED
79};
80
81static GLuint int_types_norm[4] = {
82   PIPE_FORMAT_R32_SNORM,
83   PIPE_FORMAT_R32G32_SNORM,
84   PIPE_FORMAT_R32G32B32_SNORM,
85   PIPE_FORMAT_R32G32B32A32_SNORM
86};
87
88static GLuint int_types_scale[4] = {
89   PIPE_FORMAT_R32_SSCALED,
90   PIPE_FORMAT_R32G32_SSCALED,
91   PIPE_FORMAT_R32G32B32_SSCALED,
92   PIPE_FORMAT_R32G32B32A32_SSCALED
93};
94
95static GLuint ushort_types_norm[4] = {
96   PIPE_FORMAT_R16_UNORM,
97   PIPE_FORMAT_R16G16_UNORM,
98   PIPE_FORMAT_R16G16B16_UNORM,
99   PIPE_FORMAT_R16G16B16A16_UNORM
100};
101
102static GLuint ushort_types_scale[4] = {
103   PIPE_FORMAT_R16_USCALED,
104   PIPE_FORMAT_R16G16_USCALED,
105   PIPE_FORMAT_R16G16B16_USCALED,
106   PIPE_FORMAT_R16G16B16A16_USCALED
107};
108
109static GLuint short_types_norm[4] = {
110   PIPE_FORMAT_R16_SNORM,
111   PIPE_FORMAT_R16G16_SNORM,
112   PIPE_FORMAT_R16G16B16_SNORM,
113   PIPE_FORMAT_R16G16B16A16_SNORM
114};
115
116static GLuint short_types_scale[4] = {
117   PIPE_FORMAT_R16_SSCALED,
118   PIPE_FORMAT_R16G16_SSCALED,
119   PIPE_FORMAT_R16G16B16_SSCALED,
120   PIPE_FORMAT_R16G16B16A16_SSCALED
121};
122
123static GLuint ubyte_types_norm[4] = {
124   PIPE_FORMAT_R8_UNORM,
125   PIPE_FORMAT_R8G8_UNORM,
126   PIPE_FORMAT_R8G8B8_UNORM,
127   PIPE_FORMAT_R8G8B8A8_UNORM
128};
129
130static GLuint ubyte_types_scale[4] = {
131   PIPE_FORMAT_R8_USCALED,
132   PIPE_FORMAT_R8G8_USCALED,
133   PIPE_FORMAT_R8G8B8_USCALED,
134   PIPE_FORMAT_R8G8B8A8_USCALED
135};
136
137static GLuint byte_types_norm[4] = {
138   PIPE_FORMAT_R8_SNORM,
139   PIPE_FORMAT_R8G8_SNORM,
140   PIPE_FORMAT_R8G8B8_SNORM,
141   PIPE_FORMAT_R8G8B8A8_SNORM
142};
143
144static GLuint byte_types_scale[4] = {
145   PIPE_FORMAT_R8_SSCALED,
146   PIPE_FORMAT_R8G8_SSCALED,
147   PIPE_FORMAT_R8G8B8_SSCALED,
148   PIPE_FORMAT_R8G8B8A8_SSCALED
149};
150
151
152/**
153 * Return a PIPE_FORMAT_x for the given GL datatype and size.
154 */
155static GLuint
156pipe_vertex_format(GLenum type, GLuint size, GLboolean normalized)
157{
158   assert(type >= GL_BYTE);
159   assert(type <= GL_DOUBLE);
160   assert(size >= 1);
161   assert(size <= 4);
162
163   if (normalized) {
164      switch (type) {
165      case GL_DOUBLE: return double_types[size-1];
166      case GL_FLOAT: return float_types[size-1];
167      case GL_INT: return int_types_norm[size-1];
168      case GL_SHORT: return short_types_norm[size-1];
169      case GL_BYTE: return byte_types_norm[size-1];
170      case GL_UNSIGNED_INT: return uint_types_norm[size-1];
171      case GL_UNSIGNED_SHORT: return ushort_types_norm[size-1];
172      case GL_UNSIGNED_BYTE: return ubyte_types_norm[size-1];
173      default: assert(0); return 0;
174      }
175   }
176   else {
177      switch (type) {
178      case GL_DOUBLE: return double_types[size-1];
179      case GL_FLOAT: return float_types[size-1];
180      case GL_INT: return int_types_scale[size-1];
181      case GL_SHORT: return short_types_scale[size-1];
182      case GL_BYTE: return byte_types_scale[size-1];
183      case GL_UNSIGNED_INT: return uint_types_scale[size-1];
184      case GL_UNSIGNED_SHORT: return ushort_types_scale[size-1];
185      case GL_UNSIGNED_BYTE: return ubyte_types_scale[size-1];
186      default: assert(0); return 0;
187      }
188   }
189   return 0; /* silence compiler warning */
190}
191
192
193/**
194 * This function gets plugged into the VBO module and is called when
195 * we have something to render.
196 * Basically, translate the information into the format expected by pipe.
197 */
198void
199st_draw_vbo(GLcontext *ctx,
200            const struct gl_client_array **arrays,
201            const struct _mesa_prim *prims,
202            GLuint nr_prims,
203            const struct _mesa_index_buffer *ib,
204            GLuint min_index,
205            GLuint max_index)
206{
207   struct pipe_context *pipe = ctx->st->pipe;
208   struct pipe_winsys *winsys = pipe->winsys;
209   const struct st_vertex_program *vp;
210   const struct pipe_shader_state *vs;
211   struct pipe_vertex_buffer vbuffer[PIPE_MAX_SHADER_INPUTS];
212   GLuint attr;
213
214   /* sanity check for pointer arithmetic below */
215   assert(sizeof(arrays[0]->Ptr[0]) == 1);
216
217   st_validate_state(ctx->st);
218
219   /* must get these after state validation! */
220   vp = ctx->st->vp;
221   vs = &ctx->st->vp->state;
222
223   /* loop over TGSI shader inputs to determine vertex buffer
224    * and attribute info
225    */
226   for (attr = 0; attr < vp->num_inputs; attr++) {
227      const GLuint mesaAttr = vp->index_to_input[attr];
228      struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
229      struct pipe_vertex_element velement;
230
231      if (bufobj && bufobj->Name) {
232         /* Attribute data is in a VBO.
233          * Recall that for VBOs, the gl_client_array->Ptr field is
234          * really an offset from the start of the VBO, not a pointer.
235          */
236         struct st_buffer_object *stobj = st_buffer_object(bufobj);
237         assert(stobj->buffer);
238
239         vbuffer[attr].buffer = NULL;
240         pipe_buffer_reference(winsys, &vbuffer[attr].buffer, stobj->buffer);
241         vbuffer[attr].buffer_offset = (unsigned) arrays[0]->Ptr;/* in bytes */
242         velement.src_offset = arrays[mesaAttr]->Ptr - arrays[0]->Ptr;
243         assert(velement.src_offset <= 2048); /* 11-bit field */
244      }
245      else {
246         /* attribute data is in user-space memory, not a VBO */
247         uint bytes;
248
249         if (!arrays[mesaAttr]->StrideB) {
250            bytes = arrays[mesaAttr]->Size
251                    * _mesa_sizeof_type(arrays[mesaAttr]->Type);
252         } else {
253            bytes = arrays[mesaAttr]->StrideB * (max_index + 1);
254         }
255
256         /* wrap user data */
257         vbuffer[attr].buffer
258            = winsys->user_buffer_create(winsys,
259                                         (void *) arrays[mesaAttr]->Ptr,
260                                         bytes);
261         vbuffer[attr].buffer_offset = 0;
262         velement.src_offset = 0;
263      }
264
265      /* common-case setup */
266      vbuffer[attr].pitch = arrays[mesaAttr]->StrideB; /* in bytes */
267      vbuffer[attr].max_index = max_index;
268      velement.vertex_buffer_index = attr;
269      velement.nr_components = arrays[mesaAttr]->Size;
270      velement.src_format = pipe_vertex_format(arrays[mesaAttr]->Type,
271                                               arrays[mesaAttr]->Size,
272                                               arrays[mesaAttr]->Normalized);
273      assert(velement.src_format);
274
275      /* tell pipe about this attribute */
276      pipe->set_vertex_buffer(pipe, attr, &vbuffer[attr]);
277      pipe->set_vertex_element(pipe, attr, &velement);
278   }
279
280
281   /* do actual drawing */
282   if (ib) {
283      /* indexed primitive */
284      struct gl_buffer_object *bufobj = ib->obj;
285      struct pipe_buffer *indexBuf = NULL;
286      unsigned indexSize, indexOffset, i;
287
288      switch (ib->type) {
289      case GL_UNSIGNED_INT:
290         indexSize = 4;
291         break;
292      case GL_UNSIGNED_SHORT:
293         indexSize = 2;
294         break;
295      case GL_UNSIGNED_BYTE:
296         indexSize = 1;
297         break;
298      default:
299         assert(0);
300	 return;
301      }
302
303      /* get/create the index buffer object */
304      if (bufobj && bufobj->Name) {
305         /* elements/indexes are in a real VBO */
306         struct st_buffer_object *stobj = st_buffer_object(bufobj);
307         pipe_buffer_reference(winsys, &indexBuf, stobj->buffer);
308         indexOffset = (unsigned) ib->ptr / indexSize;
309      }
310      else {
311         /* element/indicies are in user space memory */
312         indexBuf = winsys->user_buffer_create(winsys,
313                                               (void *) ib->ptr,
314                                               ib->count * indexSize);
315         indexOffset = 0;
316      }
317
318      /* draw */
319      for (i = 0; i < nr_prims; i++) {
320         pipe->draw_elements(pipe, indexBuf, indexSize,
321                             prims[i].mode,
322                             prims[i].start + indexOffset, prims[i].count);
323      }
324
325      pipe_buffer_reference(winsys, &indexBuf, NULL);
326   }
327   else {
328      /* non-indexed */
329      GLuint i;
330      for (i = 0; i < nr_prims; i++) {
331         pipe->draw_arrays(pipe, prims[i].mode, prims[i].start, prims[i].count);
332      }
333   }
334
335   /* unreference buffers (frees wrapped user-space buffer objects) */
336   for (attr = 0; attr < vp->num_inputs; attr++) {
337      pipe_buffer_reference(winsys, &vbuffer[attr].buffer, NULL);
338      assert(!vbuffer[attr].buffer);
339      pipe->set_vertex_buffer(pipe, attr, &vbuffer[attr]);
340   }
341}
342
343
344
345/**
346 * Utility function for drawing simple primitives (such as quads for
347 * glClear and glDrawPixels).  Coordinates are in screen space.
348 * \param mode  one of PIPE_PRIM_x
349 * \param numVertex  number of vertices
350 * \param verts  vertex data (all attributes are float[4])
351 * \param numAttribs  number of attributes per vertex
352 */
353void
354st_draw_vertices(GLcontext *ctx, unsigned prim,
355                 unsigned numVertex, float *verts,
356                 unsigned numAttribs,
357                 GLboolean inClipCoords)
358{
359   const float width = ctx->DrawBuffer->Width;
360   const float height = ctx->DrawBuffer->Height;
361   const unsigned vertex_bytes = numVertex * numAttribs * 4 * sizeof(float);
362   struct pipe_context *pipe = ctx->st->pipe;
363   struct pipe_buffer *vbuf;
364   struct pipe_vertex_buffer vbuffer;
365   struct pipe_vertex_element velement;
366   unsigned i;
367
368   assert(numAttribs > 0);
369
370   if (!inClipCoords) {
371      /* convert to clip coords */
372      for (i = 0; i < numVertex; i++) {
373         float x = verts[i * numAttribs * 4 + 0];
374         float y = verts[i * numAttribs * 4 + 1];
375         x = x / width * 2.0 - 1.0;
376         y = y / height * 2.0 - 1.0;
377         verts[i * numAttribs * 4 + 0] = x;
378         verts[i * numAttribs * 4 + 1] = y;
379      }
380   }
381
382   /* XXX create one-time */
383   vbuf = pipe->winsys->buffer_create(pipe->winsys, 32,
384                                      PIPE_BUFFER_USAGE_VERTEX, vertex_bytes);
385   assert(vbuf);
386
387   memcpy(pipe->winsys->buffer_map(pipe->winsys, vbuf,
388                                   PIPE_BUFFER_USAGE_CPU_WRITE),
389          verts, vertex_bytes);
390   pipe->winsys->buffer_unmap(pipe->winsys, vbuf);
391
392   /* tell pipe about the vertex buffer */
393   vbuffer.buffer = vbuf;
394   vbuffer.pitch = numAttribs * 4 * sizeof(float);  /* vertex size */
395   vbuffer.buffer_offset = 0;
396   pipe->set_vertex_buffer(pipe, 0, &vbuffer);
397
398   /* tell pipe about the vertex attributes */
399   for (i = 0; i < numAttribs; i++) {
400      velement.src_offset = i * 4 * sizeof(GLfloat);
401      velement.vertex_buffer_index = 0;
402      velement.src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
403      velement.nr_components = 4;
404      pipe->set_vertex_element(pipe, i, &velement);
405   }
406
407   /* draw */
408   pipe->draw_arrays(pipe, prim, 0, numVertex);
409
410   /* XXX: do one-time */
411   pipe_buffer_reference(pipe->winsys, &vbuf, NULL);
412}
413
414
415/**
416 * Set the (private) draw module's post-transformed vertex format when in
417 * GL_SELECT or GL_FEEDBACK mode or for glRasterPos.
418 */
419static void
420set_feedback_vertex_format(GLcontext *ctx)
421{
422#if 0
423   struct st_context *st = ctx->st;
424   struct vertex_info vinfo;
425   GLuint i;
426
427   memset(&vinfo, 0, sizeof(vinfo));
428
429   if (ctx->RenderMode == GL_SELECT) {
430      assert(ctx->RenderMode == GL_SELECT);
431      vinfo.num_attribs = 1;
432      vinfo.format[0] = FORMAT_4F;
433      vinfo.interp_mode[0] = INTERP_LINEAR;
434   }
435   else {
436      /* GL_FEEDBACK, or glRasterPos */
437      /* emit all attribs (pos, color, texcoord) as GLfloat[4] */
438      vinfo.num_attribs = st->state.vs->cso->state.num_outputs;
439      for (i = 0; i < vinfo.num_attribs; i++) {
440         vinfo.format[i] = FORMAT_4F;
441         vinfo.interp_mode[i] = INTERP_LINEAR;
442      }
443   }
444
445   draw_set_vertex_info(st->draw, &vinfo);
446#endif
447}
448
449
450/**
451 * Called by VBO to draw arrays when in selection or feedback mode and
452 * to implement glRasterPos.
453 * This is very much like the normal draw_vbo() function above.
454 * Look at code refactoring some day.
455 * Might move this into the failover module some day.
456 */
457void
458st_feedback_draw_vbo(GLcontext *ctx,
459                     const struct gl_client_array **arrays,
460                     const struct _mesa_prim *prims,
461                     GLuint nr_prims,
462                     const struct _mesa_index_buffer *ib,
463                     GLuint min_index,
464                     GLuint max_index)
465{
466   struct st_context *st = ctx->st;
467   struct pipe_context *pipe = st->pipe;
468   struct draw_context *draw = st->draw;
469   struct pipe_winsys *winsys = pipe->winsys;
470   const struct st_vertex_program *vp;
471   const struct pipe_shader_state *vs;
472   struct pipe_buffer *index_buffer_handle = 0;
473   struct pipe_vertex_buffer vbuffer[PIPE_MAX_SHADER_INPUTS];
474   GLuint attr, i;
475   ubyte *mapped_constants;
476
477   assert(draw);
478
479   st_validate_state(ctx->st);
480
481   /* must get these after state validation! */
482   vp = ctx->st->vp;
483   vs = &st->vp->state;
484
485   if (!st->vp->draw_shader) {
486      st->vp->draw_shader = draw_create_vertex_shader(draw, vs);
487   }
488
489   /*
490    * Set up the draw module's state.
491    *
492    * We'd like to do this less frequently, but the normal state-update
493    * code sends state updates to the pipe, not to our private draw module.
494    */
495   assert(draw);
496   draw_set_viewport_state(draw, &st->state.viewport);
497   draw_set_clip_state(draw, &st->state.clip);
498   draw_set_rasterizer_state(draw, &st->state.rasterizer);
499   draw_bind_vertex_shader(draw, st->vp->draw_shader);
500   set_feedback_vertex_format(ctx);
501
502   /* loop over TGSI shader inputs to determine vertex buffer
503    * and attribute info
504    */
505   for (attr = 0; attr < vp->num_inputs; attr++) {
506      const GLuint mesaAttr = vp->index_to_input[attr];
507      struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
508      struct pipe_vertex_element velement;
509      void *map;
510
511      if (bufobj && bufobj->Name) {
512         /* Attribute data is in a VBO.
513          * Recall that for VBOs, the gl_client_array->Ptr field is
514          * really an offset from the start of the VBO, not a pointer.
515          */
516         struct st_buffer_object *stobj = st_buffer_object(bufobj);
517         assert(stobj->buffer);
518
519         vbuffer[attr].buffer = NULL;
520         pipe_buffer_reference(winsys, &vbuffer[attr].buffer, stobj->buffer);
521         vbuffer[attr].buffer_offset = (unsigned) arrays[0]->Ptr;/* in bytes */
522         velement.src_offset = arrays[mesaAttr]->Ptr - arrays[0]->Ptr;
523      }
524      else {
525         /* attribute data is in user-space memory, not a VBO */
526         uint bytes = (arrays[mesaAttr]->Size
527                       * _mesa_sizeof_type(arrays[mesaAttr]->Type)
528                       * (max_index + 1));
529
530         /* wrap user data */
531         vbuffer[attr].buffer
532            = winsys->user_buffer_create(winsys,
533                                         (void *) arrays[mesaAttr]->Ptr,
534                                         bytes);
535         vbuffer[attr].buffer_offset = 0;
536         velement.src_offset = 0;
537      }
538
539      /* common-case setup */
540      vbuffer[attr].pitch = arrays[mesaAttr]->StrideB; /* in bytes */
541      vbuffer[attr].max_index = max_index;
542      velement.vertex_buffer_index = attr;
543      velement.nr_components = arrays[mesaAttr]->Size;
544      velement.src_format = pipe_vertex_format(arrays[mesaAttr]->Type,
545                                               arrays[mesaAttr]->Size,
546                                               arrays[mesaAttr]->Normalized);
547      assert(velement.src_format);
548
549      /* tell draw about this attribute */
550      draw_set_vertex_buffer(draw, attr, &vbuffer[attr]);
551      draw_set_vertex_element(draw, attr, &velement);
552
553      /* map the attrib buffer */
554      map = pipe->winsys->buffer_map(pipe->winsys,
555                                     vbuffer[attr].buffer,
556                                     PIPE_BUFFER_USAGE_CPU_READ);
557      draw_set_mapped_vertex_buffer(draw, attr, map);
558   }
559
560   if (ib) {
561      unsigned indexSize;
562      struct gl_buffer_object *bufobj = ib->obj;
563      struct st_buffer_object *stobj = st_buffer_object(bufobj);
564      index_buffer_handle = stobj->buffer;
565      void *map;
566
567      switch (ib->type) {
568      case GL_UNSIGNED_INT:
569         indexSize = 4;
570         break;
571      case GL_UNSIGNED_SHORT:
572         indexSize = 2;
573         break;
574      default:
575         assert(0);
576	 return;
577      }
578
579      map = pipe->winsys->buffer_map(pipe->winsys,
580                                     index_buffer_handle,
581                                     PIPE_BUFFER_USAGE_CPU_READ);
582      draw_set_mapped_element_buffer(draw, indexSize, map);
583   }
584   else {
585      /* no index/element buffer */
586      draw_set_mapped_element_buffer(draw, 0, NULL);
587   }
588
589
590   /* map constant buffers */
591   mapped_constants = winsys->buffer_map(winsys,
592                               st->state.constants[PIPE_SHADER_VERTEX].buffer,
593                               PIPE_BUFFER_USAGE_CPU_READ);
594   draw_set_mapped_constant_buffer(st->draw, mapped_constants);
595
596
597   /* draw here */
598   for (i = 0; i < nr_prims; i++) {
599      draw_arrays(draw, prims[i].mode, prims[i].start, prims[i].count);
600   }
601
602
603   /* unmap constant buffers */
604   winsys->buffer_unmap(winsys, st->state.constants[PIPE_SHADER_VERTEX].buffer);
605
606   /*
607    * unmap vertex/index buffers
608    */
609   for (i = 0; i < PIPE_ATTRIB_MAX; i++) {
610      if (draw->vertex_buffer[i].buffer) {
611         pipe->winsys->buffer_unmap(pipe->winsys,
612                                    draw->vertex_buffer[i].buffer);
613         pipe_buffer_reference(winsys, &draw->vertex_buffer[i].buffer, NULL);
614         draw_set_mapped_vertex_buffer(draw, i, NULL);
615      }
616   }
617   if (ib) {
618      pipe->winsys->buffer_unmap(pipe->winsys, index_buffer_handle);
619      draw_set_mapped_element_buffer(draw, 0, NULL);
620   }
621}
622
623
624
625void st_init_draw( struct st_context *st )
626{
627   GLcontext *ctx = st->ctx;
628
629   vbo_set_draw_func(ctx, st_draw_vbo);
630}
631
632
633void st_destroy_draw( struct st_context *st )
634{
635}
636
637
638