st_draw.c revision 1e0d30a515e4cac891b6c590f12a33e0e8a8e295 
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_cache.h"
40#include "st_context.h"
41#include "st_cb_bufferobjects.h"
42#include "st_draw.h"
43#include "st_program.h"
44
45#include "pipe/p_context.h"
46#include "pipe/p_defines.h"
47#include "pipe/p_winsys.h"
48#include "pipe/p_inlines.h"
49
50#include "pipe/draw/draw_private.h"
51#include "pipe/draw/draw_context.h"
52
53
54static GLuint double_types[4] = {
55   PIPE_FORMAT_R64_FLOAT,
56   PIPE_FORMAT_R64G64_FLOAT,
57   PIPE_FORMAT_R64G64B64_FLOAT,
58   PIPE_FORMAT_R64G64B64A64_FLOAT
59};
60
61static GLuint float_types[4] = {
62   PIPE_FORMAT_R32_FLOAT,
63   PIPE_FORMAT_R32G32_FLOAT,
64   PIPE_FORMAT_R32G32B32_FLOAT,
65   PIPE_FORMAT_R32G32B32A32_FLOAT
66};
67
68static GLuint uint_types_norm[4] = {
69   PIPE_FORMAT_R32_UNORM,
70   PIPE_FORMAT_R32G32_UNORM,
71   PIPE_FORMAT_R32G32B32_UNORM,
72   PIPE_FORMAT_R32G32B32A32_UNORM
73};
74
75static GLuint uint_types_scale[4] = {
76   PIPE_FORMAT_R32_USCALED,
77   PIPE_FORMAT_R32G32_USCALED,
78   PIPE_FORMAT_R32G32B32_USCALED,
79   PIPE_FORMAT_R32G32B32A32_USCALED
80};
81
82static GLuint int_types_norm[4] = {
83   PIPE_FORMAT_R32_SNORM,
84   PIPE_FORMAT_R32G32_SNORM,
85   PIPE_FORMAT_R32G32B32_SNORM,
86   PIPE_FORMAT_R32G32B32A32_SNORM
87};
88
89static GLuint int_types_scale[4] = {
90   PIPE_FORMAT_R32_SSCALED,
91   PIPE_FORMAT_R32G32_SSCALED,
92   PIPE_FORMAT_R32G32B32_SSCALED,
93   PIPE_FORMAT_R32G32B32A32_SSCALED
94};
95
96static GLuint ushort_types_norm[4] = {
97   PIPE_FORMAT_R16_UNORM,
98   PIPE_FORMAT_R16G16_UNORM,
99   PIPE_FORMAT_R16G16B16_UNORM,
100   PIPE_FORMAT_R16G16B16A16_UNORM
101};
102
103static GLuint ushort_types_scale[4] = {
104   PIPE_FORMAT_R16_USCALED,
105   PIPE_FORMAT_R16G16_USCALED,
106   PIPE_FORMAT_R16G16B16_USCALED,
107   PIPE_FORMAT_R16G16B16A16_USCALED
108};
109
110static GLuint short_types_norm[4] = {
111   PIPE_FORMAT_R16_SNORM,
112   PIPE_FORMAT_R16G16_SNORM,
113   PIPE_FORMAT_R16G16B16_SNORM,
114   PIPE_FORMAT_R16G16B16A16_SNORM
115};
116
117static GLuint short_types_scale[4] = {
118   PIPE_FORMAT_R16_SSCALED,
119   PIPE_FORMAT_R16G16_SSCALED,
120   PIPE_FORMAT_R16G16B16_SSCALED,
121   PIPE_FORMAT_R16G16B16A16_SSCALED
122};
123
124static GLuint ubyte_types_norm[4] = {
125   PIPE_FORMAT_R8_UNORM,
126   PIPE_FORMAT_R8G8_UNORM,
127   PIPE_FORMAT_R8G8B8_UNORM,
128   PIPE_FORMAT_R8G8B8A8_UNORM
129};
130
131static GLuint ubyte_types_scale[4] = {
132   PIPE_FORMAT_R8_USCALED,
133   PIPE_FORMAT_R8G8_USCALED,
134   PIPE_FORMAT_R8G8B8_USCALED,
135   PIPE_FORMAT_R8G8B8A8_USCALED
136};
137
138static GLuint byte_types_norm[4] = {
139   PIPE_FORMAT_R8_SNORM,
140   PIPE_FORMAT_R8G8_SNORM,
141   PIPE_FORMAT_R8G8B8_SNORM,
142   PIPE_FORMAT_R8G8B8A8_SNORM
143};
144
145static GLuint byte_types_scale[4] = {
146   PIPE_FORMAT_R8_SSCALED,
147   PIPE_FORMAT_R8G8_SSCALED,
148   PIPE_FORMAT_R8G8B8_SSCALED,
149   PIPE_FORMAT_R8G8B8A8_SSCALED
150};
151
152
153/**
154 * Return a PIPE_FORMAT_x for the given GL datatype and size.
155 */
156static GLuint
157pipe_vertex_format(GLenum type, GLuint size, GLboolean normalized)
158{
159   assert(type >= GL_BYTE);
160   assert(type <= GL_DOUBLE);
161   assert(size >= 1);
162   assert(size <= 4);
163
164   if (normalized) {
165      switch (type) {
166      case GL_DOUBLE: return double_types[size-1];
167      case GL_FLOAT: return float_types[size-1];
168      case GL_INT: return int_types_norm[size-1];
169      case GL_SHORT: return short_types_norm[size-1];
170      case GL_BYTE: return byte_types_norm[size-1];
171      case GL_UNSIGNED_INT: return uint_types_norm[size-1];
172      case GL_UNSIGNED_SHORT: return ushort_types_norm[size-1];
173      case GL_UNSIGNED_BYTE: return ubyte_types_norm[size-1];
174      default: assert(0); return 0;
175      }
176   }
177   else {
178      switch (type) {
179      case GL_DOUBLE: return double_types[size-1];
180      case GL_FLOAT: return float_types[size-1];
181      case GL_INT: return int_types_scale[size-1];
182      case GL_SHORT: return short_types_scale[size-1];
183      case GL_BYTE: return byte_types_scale[size-1];
184      case GL_UNSIGNED_INT: return uint_types_scale[size-1];
185      case GL_UNSIGNED_SHORT: return ushort_types_scale[size-1];
186      case GL_UNSIGNED_BYTE: return ubyte_types_scale[size-1];
187      default: assert(0); return 0;
188      }
189   }
190   return 0; /* silence compiler warning */
191}
192
193
194/**
195 * This function gets plugged into the VBO module and is called when
196 * we have something to render.
197 * Basically, translate the information into the format expected by pipe.
198 */
199void
200st_draw_vbo(GLcontext *ctx,
201            const struct gl_client_array **arrays,
202            const struct _mesa_prim *prims,
203            GLuint nr_prims,
204            const struct _mesa_index_buffer *ib,
205            GLuint min_index,
206            GLuint max_index)
207{
208   struct pipe_context *pipe = ctx->st->pipe;
209   struct pipe_winsys *winsys = pipe->winsys;
210   const struct st_vertex_program *vp;
211   const struct pipe_shader_state *vs;
212   struct pipe_vertex_buffer vbuffer[PIPE_MAX_SHADER_INPUTS];
213   GLuint attr;
214
215   /* sanity check for pointer arithmetic below */
216   assert(sizeof(arrays[0]->Ptr[0]) == 1);
217
218   st_validate_state(ctx->st);
219
220   /* must get these after state validation! */
221   vp = ctx->st->vp;
222   vs = &ctx->st->state.vs->cso->state;
223
224   /* loop over TGSI shader inputs to determine vertex buffer
225    * and attribute info
226    */
227   for (attr = 0; attr < vs->num_inputs; attr++) {
228      const GLuint mesaAttr = vp->index_to_input[attr];
229      struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
230      struct pipe_vertex_element velement;
231
232      if (bufobj && bufobj->Name) {
233         /* Attribute data is in a VBO.
234          * Recall that for VBOs, the gl_client_array->Ptr field is
235          * really an offset from the start of the VBO, not a pointer.
236          */
237         struct st_buffer_object *stobj = st_buffer_object(bufobj);
238         assert(stobj->buffer);
239
240         vbuffer[attr].buffer = NULL;
241         pipe_buffer_reference(winsys, &vbuffer[attr].buffer, stobj->buffer);
242         vbuffer[attr].buffer_offset = (unsigned) arrays[0]->Ptr;/* in bytes */
243         velement.src_offset = arrays[mesaAttr]->Ptr - arrays[0]->Ptr;
244         assert(velement.src_offset <= 2048); /* 11-bit field */
245      }
246      else {
247         /* attribute data is in user-space memory, not a VBO */
248         uint bytes;
249
250         if (!arrays[mesaAttr]->StrideB) {
251            bytes = arrays[mesaAttr]->Size
252                    * _mesa_sizeof_type(arrays[mesaAttr]->Type);
253         } else {
254            bytes = arrays[mesaAttr]->StrideB * (max_index + 1);
255         }
256
257         /* wrap user data */
258         vbuffer[attr].buffer
259            = winsys->user_buffer_create(winsys,
260                                         (void *) arrays[mesaAttr]->Ptr,
261                                         bytes);
262         vbuffer[attr].buffer_offset = 0;
263         velement.src_offset = 0;
264      }
265
266      /* common-case setup */
267      vbuffer[attr].pitch = arrays[mesaAttr]->StrideB; /* in bytes */
268      vbuffer[attr].max_index = max_index;
269      velement.vertex_buffer_index = attr;
270      velement.nr_components = arrays[mesaAttr]->Size;
271      velement.src_format = pipe_vertex_format(arrays[mesaAttr]->Type,
272                                               arrays[mesaAttr]->Size,
273                                               arrays[mesaAttr]->Normalized);
274      assert(velement.src_format);
275
276      /* tell pipe about this attribute */
277      pipe->set_vertex_buffer(pipe, attr, &vbuffer[attr]);
278      pipe->set_vertex_element(pipe, attr, &velement);
279   }
280
281
282   /* do actual drawing */
283   if (ib) {
284      /* indexed primitive */
285      struct gl_buffer_object *bufobj = ib->obj;
286      struct pipe_buffer *indexBuf = NULL;
287      unsigned indexSize, indexOffset, i;
288
289      switch (ib->type) {
290      case GL_UNSIGNED_INT:
291         indexSize = 4;
292         break;
293      case GL_UNSIGNED_SHORT:
294         indexSize = 2;
295         break;
296      case GL_UNSIGNED_BYTE:
297         indexSize = 1;
298         break;
299      default:
300         assert(0);
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 < vs->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{
358   const float width = ctx->DrawBuffer->Width;
359   const float height = ctx->DrawBuffer->Height;
360   const unsigned vertex_bytes = numVertex * numAttribs * 4 * sizeof(float);
361   struct pipe_context *pipe = ctx->st->pipe;
362   struct pipe_buffer *vbuf;
363   struct pipe_vertex_buffer vbuffer;
364   struct pipe_vertex_element velement;
365   unsigned i;
366
367   assert(numAttribs > 0);
368
369   /* convert to clip coords */
370   for (i = 0; i < numVertex; i++) {
371      float x = verts[i * numAttribs * 4 + 0];
372      float y = verts[i * numAttribs * 4 + 1];
373      x = x / width * 2.0 - 1.0;
374      y = y / height * 2.0 - 1.0;
375      verts[i * numAttribs * 4 + 0] = x;
376      verts[i * numAttribs * 4 + 1] = y;
377   }
378
379   /* XXX create one-time */
380   vbuf = pipe->winsys->buffer_create(pipe->winsys, 32,
381                                      PIPE_BUFFER_USAGE_VERTEX, vertex_bytes);
382   assert(vbuf);
383
384   memcpy(pipe->winsys->buffer_map(pipe->winsys, vbuf,
385                                   PIPE_BUFFER_USAGE_CPU_WRITE),
386          verts, vertex_bytes);
387   pipe->winsys->buffer_unmap(pipe->winsys, vbuf);
388
389   /* tell pipe about the vertex buffer */
390   vbuffer.buffer = vbuf;
391   vbuffer.pitch = numAttribs * 4 * sizeof(float);  /* vertex size */
392   vbuffer.buffer_offset = 0;
393   pipe->set_vertex_buffer(pipe, 0, &vbuffer);
394
395   /* tell pipe about the vertex attributes */
396   for (i = 0; i < numAttribs; i++) {
397      velement.src_offset = i * 4 * sizeof(GLfloat);
398      velement.vertex_buffer_index = 0;
399      velement.src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
400      velement.nr_components = 4;
401      pipe->set_vertex_element(pipe, i, &velement);
402   }
403
404   /* draw */
405   pipe->draw_arrays(pipe, prim, 0, numVertex);
406
407   /* XXX: do one-time */
408   pipe_buffer_reference(pipe->winsys, &vbuf, NULL);
409}
410
411
412/**
413 * Set the (private) draw module's post-transformed vertex format when in
414 * GL_SELECT or GL_FEEDBACK mode or for glRasterPos.
415 */
416static void
417set_feedback_vertex_format(GLcontext *ctx)
418{
419#if 0
420   struct st_context *st = ctx->st;
421   struct vertex_info vinfo;
422   GLuint i;
423
424   memset(&vinfo, 0, sizeof(vinfo));
425
426   if (ctx->RenderMode == GL_SELECT) {
427      assert(ctx->RenderMode == GL_SELECT);
428      vinfo.num_attribs = 1;
429      vinfo.format[0] = FORMAT_4F;
430      vinfo.interp_mode[0] = INTERP_LINEAR;
431   }
432   else {
433      /* GL_FEEDBACK, or glRasterPos */
434      /* emit all attribs (pos, color, texcoord) as GLfloat[4] */
435      vinfo.num_attribs = st->state.vs->cso->state.num_outputs;
436      for (i = 0; i < vinfo.num_attribs; i++) {
437         vinfo.format[i] = FORMAT_4F;
438         vinfo.interp_mode[i] = INTERP_LINEAR;
439      }
440   }
441
442   draw_set_vertex_info(st->draw, &vinfo);
443#endif
444}
445
446
447/**
448 * Called by VBO to draw arrays when in selection or feedback mode and
449 * to implement glRasterPos.
450 * This is very much like the normal draw_vbo() function above.
451 * Look at code refactoring some day.
452 * Might move this into the failover module some day.
453 */
454void
455st_feedback_draw_vbo(GLcontext *ctx,
456                     const struct gl_client_array **arrays,
457                     const struct _mesa_prim *prims,
458                     GLuint nr_prims,
459                     const struct _mesa_index_buffer *ib,
460                     GLuint min_index,
461                     GLuint max_index)
462{
463   struct st_context *st = ctx->st;
464   struct pipe_context *pipe = st->pipe;
465   struct draw_context *draw = st->draw;
466   struct pipe_winsys *winsys = pipe->winsys;
467   const struct st_vertex_program *vp;
468   const struct pipe_shader_state *vs;
469   struct pipe_buffer *index_buffer_handle = 0;
470   struct pipe_vertex_buffer vbuffer[PIPE_MAX_SHADER_INPUTS];
471   GLuint attr, i;
472   ubyte *mapped_constants;
473
474   assert(draw);
475
476   st_validate_state(ctx->st);
477
478   /* must get these after state validation! */
479   vp = ctx->st->vp;
480   vs = &ctx->st->state.vs->cso->state;
481
482   if (!st->state.vs->draw_shader) {
483      st->state.vs->draw_shader = draw_create_vertex_shader(draw, vs);
484   }
485
486   /*
487    * Set up the draw module's state.
488    *
489    * We'd like to do this less frequently, but the normal state-update
490    * code sends state updates to the pipe, not to our private draw module.
491    */
492   assert(draw);
493   draw_set_viewport_state(draw, &st->state.viewport);
494   draw_set_clip_state(draw, &st->state.clip);
495   draw_set_rasterizer_state(draw, &st->state.rasterizer->state);
496   draw_bind_vertex_shader(draw, st->state.vs->draw_shader);
497   set_feedback_vertex_format(ctx);
498
499   /* loop over TGSI shader inputs to determine vertex buffer
500    * and attribute info
501    */
502   for (attr = 0; attr < vs->num_inputs; attr++) {
503      const GLuint mesaAttr = vp->index_to_input[attr];
504      struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
505      struct pipe_vertex_element velement;
506      void *map;
507
508      if (bufobj && bufobj->Name) {
509         /* Attribute data is in a VBO.
510          * Recall that for VBOs, the gl_client_array->Ptr field is
511          * really an offset from the start of the VBO, not a pointer.
512          */
513         struct st_buffer_object *stobj = st_buffer_object(bufobj);
514         assert(stobj->buffer);
515
516         vbuffer[attr].buffer = NULL;
517         pipe_buffer_reference(winsys, &vbuffer[attr].buffer, stobj->buffer);
518         vbuffer[attr].buffer_offset = (unsigned) arrays[0]->Ptr;/* in bytes */
519         velement.src_offset = arrays[mesaAttr]->Ptr - arrays[0]->Ptr;
520      }
521      else {
522         /* attribute data is in user-space memory, not a VBO */
523         uint bytes = (arrays[mesaAttr]->Size
524                       * _mesa_sizeof_type(arrays[mesaAttr]->Type)
525                       * (max_index + 1));
526
527         /* wrap user data */
528         vbuffer[attr].buffer
529            = winsys->user_buffer_create(winsys,
530                                         (void *) arrays[mesaAttr]->Ptr,
531                                         bytes);
532         vbuffer[attr].buffer_offset = 0;
533         velement.src_offset = 0;
534      }
535
536      /* common-case setup */
537      vbuffer[attr].pitch = arrays[mesaAttr]->StrideB; /* in bytes */
538      vbuffer[attr].max_index = max_index;
539      velement.vertex_buffer_index = attr;
540      velement.nr_components = arrays[mesaAttr]->Size;
541      velement.src_format = pipe_vertex_format(arrays[mesaAttr]->Type,
542                                               arrays[mesaAttr]->Size,
543                                               arrays[mesaAttr]->Normalized);
544      assert(velement.src_format);
545
546      /* tell draw about this attribute */
547      draw_set_vertex_buffer(draw, attr, &vbuffer[attr]);
548      draw_set_vertex_element(draw, attr, &velement);
549
550      /* map the attrib buffer */
551      map = pipe->winsys->buffer_map(pipe->winsys,
552                                     vbuffer[attr].buffer,
553                                     PIPE_BUFFER_USAGE_CPU_READ);
554      draw_set_mapped_vertex_buffer(draw, attr, map);
555   }
556
557   if (ib) {
558      unsigned indexSize;
559      struct gl_buffer_object *bufobj = ib->obj;
560      struct st_buffer_object *stobj = st_buffer_object(bufobj);
561      index_buffer_handle = stobj->buffer;
562      void *map;
563
564      switch (ib->type) {
565      case GL_UNSIGNED_INT:
566         indexSize = 4;
567         break;
568      case GL_UNSIGNED_SHORT:
569         indexSize = 2;
570         break;
571      default:
572         assert(0);
573      }
574
575      map = pipe->winsys->buffer_map(pipe->winsys,
576                                     index_buffer_handle,
577                                     PIPE_BUFFER_USAGE_CPU_READ);
578      draw_set_mapped_element_buffer(draw, indexSize, map);
579   }
580   else {
581      /* no index/element buffer */
582      draw_set_mapped_element_buffer(draw, 0, NULL);
583   }
584
585
586   /* map constant buffers */
587   mapped_constants = winsys->buffer_map(winsys,
588                               st->state.constants[PIPE_SHADER_VERTEX].buffer,
589                               PIPE_BUFFER_USAGE_CPU_READ);
590   draw_set_mapped_constant_buffer(st->draw, mapped_constants);
591
592
593   /* draw here */
594   for (i = 0; i < nr_prims; i++) {
595      draw_arrays(draw, prims[i].mode, prims[i].start, prims[i].count);
596   }
597
598
599   /* unmap constant buffers */
600   winsys->buffer_unmap(winsys, st->state.constants[PIPE_SHADER_VERTEX].buffer);
601
602   /*
603    * unmap vertex/index buffers
604    */
605   for (i = 0; i < PIPE_ATTRIB_MAX; i++) {
606      if (draw->vertex_buffer[i].buffer) {
607         pipe->winsys->buffer_unmap(pipe->winsys,
608                                    draw->vertex_buffer[i].buffer);
609         pipe_buffer_reference(winsys, &draw->vertex_buffer[i].buffer, NULL);
610         draw_set_mapped_vertex_buffer(draw, i, NULL);
611      }
612   }
613   if (ib) {
614      pipe->winsys->buffer_unmap(pipe->winsys, index_buffer_handle);
615      draw_set_mapped_element_buffer(draw, 0, NULL);
616   }
617}
618
619
620
621void st_init_draw( struct st_context *st )
622{
623   GLcontext *ctx = st->ctx;
624
625   vbo_set_draw_func(ctx, st_draw_vbo);
626}
627
628
629void st_destroy_draw( struct st_context *st )
630{
631}
632
633
634