vbo_exec_draw.c revision f9995b30756140724f41daf963fa06167912be7f 
1/*
2 * Mesa 3-D graphics library
3 * Version:  7.2
4 *
5 * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors:
25 *    Keith Whitwell <keith@tungstengraphics.com>
26 */
27
28#include "main/glheader.h"
29#include "main/bufferobj.h"
30#include "main/compiler.h"
31#include "main/enums.h"
32#include "main/state.h"
33
34#include "vbo_context.h"
35
36
37#if FEATURE_beginend
38
39
40static void
41vbo_exec_debug_verts( struct vbo_exec_context *exec )
42{
43   GLuint count = exec->vtx.vert_count;
44   GLuint i;
45
46   printf("%s: %u vertices %d primitives, %d vertsize\n",
47	  __FUNCTION__,
48	  count,
49	  exec->vtx.prim_count,
50	  exec->vtx.vertex_size);
51
52   for (i = 0 ; i < exec->vtx.prim_count ; i++) {
53      struct _mesa_prim *prim = &exec->vtx.prim[i];
54      printf("   prim %d: %s%s %d..%d %s %s\n",
55	     i,
56	     _mesa_lookup_prim_by_nr(prim->mode),
57	     prim->weak ? " (weak)" : "",
58	     prim->start,
59	     prim->start + prim->count,
60	     prim->begin ? "BEGIN" : "(wrap)",
61	     prim->end ? "END" : "(wrap)");
62   }
63}
64
65
66/*
67 * NOTE: Need to have calculated primitives by this point -- do it on the fly.
68 * NOTE: Old 'parity' issue is gone.
69 */
70static GLuint
71vbo_copy_vertices( struct vbo_exec_context *exec )
72{
73   GLuint nr = exec->vtx.prim[exec->vtx.prim_count-1].count;
74   GLuint ovf, i;
75   GLuint sz = exec->vtx.vertex_size;
76   GLfloat *dst = exec->vtx.copied.buffer;
77   const GLfloat *src = (exec->vtx.buffer_map +
78                         exec->vtx.prim[exec->vtx.prim_count-1].start *
79                         exec->vtx.vertex_size);
80
81
82   switch (exec->ctx->Driver.CurrentExecPrimitive) {
83   case GL_POINTS:
84      return 0;
85   case GL_LINES:
86      ovf = nr&1;
87      for (i = 0 ; i < ovf ; i++)
88	 memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
89      return i;
90   case GL_TRIANGLES:
91      ovf = nr%3;
92      for (i = 0 ; i < ovf ; i++)
93	 memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
94      return i;
95   case GL_QUADS:
96      ovf = nr&3;
97      for (i = 0 ; i < ovf ; i++)
98	 memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
99      return i;
100   case GL_LINE_STRIP:
101      if (nr == 0) {
102	 return 0;
103      }
104      else {
105	 memcpy( dst, src+(nr-1)*sz, sz * sizeof(GLfloat) );
106	 return 1;
107      }
108   case GL_LINE_LOOP:
109   case GL_TRIANGLE_FAN:
110   case GL_POLYGON:
111      if (nr == 0) {
112	 return 0;
113      }
114      else if (nr == 1) {
115	 memcpy( dst, src+0, sz * sizeof(GLfloat) );
116	 return 1;
117      }
118      else {
119	 memcpy( dst, src+0, sz * sizeof(GLfloat) );
120	 memcpy( dst+sz, src+(nr-1)*sz, sz * sizeof(GLfloat) );
121	 return 2;
122      }
123   case GL_TRIANGLE_STRIP:
124      /* no parity issue, but need to make sure the tri is not drawn twice */
125      if (nr & 1) {
126	 exec->vtx.prim[exec->vtx.prim_count-1].count--;
127      }
128      /* fallthrough */
129   case GL_QUAD_STRIP:
130      switch (nr) {
131      case 0:
132         ovf = 0;
133         break;
134      case 1:
135         ovf = 1;
136         break;
137      default:
138         ovf = 2 + (nr & 1);
139         break;
140      }
141      for (i = 0 ; i < ovf ; i++)
142	 memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
143      return i;
144   case PRIM_OUTSIDE_BEGIN_END:
145      return 0;
146   default:
147      assert(0);
148      return 0;
149   }
150}
151
152
153
154/* TODO: populate these as the vertex is defined:
155 */
156static void
157vbo_exec_bind_arrays( struct gl_context *ctx )
158{
159   struct vbo_context *vbo = vbo_context(ctx);
160   struct vbo_exec_context *exec = &vbo->exec;
161   struct gl_client_array *arrays = exec->vtx.arrays;
162   const GLuint count = exec->vtx.vert_count;
163   const GLubyte *data = (GLubyte *) exec->vtx.buffer_map;
164   const GLuint *map;
165   GLuint attr;
166   GLbitfield varying_inputs = 0x0;
167
168   /* Install the default (ie Current) attributes first, then overlay
169    * all active ones.
170    */
171   switch (get_program_mode(exec->ctx)) {
172   case VP_NONE:
173      for (attr = 0; attr < 16; attr++) {
174         exec->vtx.inputs[attr] = &vbo->legacy_currval[attr];
175      }
176      for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) {
177         ASSERT(attr + 16 < Elements(exec->vtx.inputs));
178         exec->vtx.inputs[attr + 16] = &vbo->mat_currval[attr];
179      }
180      map = vbo->map_vp_none;
181      break;
182   case VP_NV:
183   case VP_ARB:
184      /* The aliasing of attributes for NV vertex programs has already
185       * occurred.  NV vertex programs cannot access material values,
186       * nor attributes greater than VERT_ATTRIB_TEX7.
187       */
188      for (attr = 0; attr < 16; attr++) {
189         exec->vtx.inputs[attr] = &vbo->legacy_currval[attr];
190         ASSERT(attr + 16 < Elements(exec->vtx.inputs));
191         exec->vtx.inputs[attr + 16] = &vbo->generic_currval[attr];
192      }
193      map = vbo->map_vp_arb;
194
195      /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read.
196       * In that case we effectively need to route the data from
197       * glVertexAttrib(0, val) calls to feed into the GENERIC0 input.
198       */
199      if ((ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_POS) == 0 &&
200          (ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_GENERIC0)) {
201         exec->vtx.inputs[16] = exec->vtx.inputs[0];
202         exec->vtx.attrsz[16] = exec->vtx.attrsz[0];
203         exec->vtx.attrptr[16] = exec->vtx.attrptr[0];
204         exec->vtx.attrsz[0] = 0;
205      }
206      break;
207   default:
208      assert(0);
209   }
210
211   /* Make all active attributes (including edgeflag) available as
212    * arrays of floats.
213    */
214   for (attr = 0; attr < VERT_ATTRIB_MAX ; attr++) {
215      const GLuint src = map[attr];
216
217      if (exec->vtx.attrsz[src]) {
218         /* override the default array set above */
219         ASSERT(attr < Elements(exec->vtx.inputs));
220         ASSERT(attr < Elements(exec->vtx.arrays)); /* arrays[] */
221         exec->vtx.inputs[attr] = &arrays[attr];
222
223         if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
224            /* a real buffer obj: Ptr is an offset, not a pointer*/
225            GLsizeiptr offset;
226            assert(exec->vtx.bufferobj->Pointer);  /* buf should be mapped */
227            offset = (GLbyte *) data -
228	       (GLbyte *) exec->vtx.bufferobj->Pointer +
229	       exec->vtx.bufferobj->Offset;
230            assert(offset >= 0);
231            arrays[attr].Ptr = (void *) offset;
232         }
233         else {
234            /* Ptr into ordinary app memory */
235            arrays[attr].Ptr = (void *) data;
236         }
237	 arrays[attr].Size = exec->vtx.attrsz[src];
238	 arrays[attr].StrideB = exec->vtx.vertex_size * sizeof(GLfloat);
239	 arrays[attr].Stride = exec->vtx.vertex_size * sizeof(GLfloat);
240	 arrays[attr].Type = GL_FLOAT;
241         arrays[attr].Format = GL_RGBA;
242	 arrays[attr].Enabled = 1;
243         _mesa_reference_buffer_object(ctx,
244                                       &arrays[attr].BufferObj,
245                                       exec->vtx.bufferobj);
246	 arrays[attr]._MaxElement = count; /* ??? */
247
248	 data += exec->vtx.attrsz[src] * sizeof(GLfloat);
249         varying_inputs |= 1 << attr;
250      }
251   }
252
253   _mesa_set_varying_vp_inputs( ctx, varying_inputs );
254}
255
256
257static void
258vbo_exec_vtx_unmap( struct vbo_exec_context *exec )
259{
260   GLenum target = GL_ARRAY_BUFFER_ARB;
261
262   if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
263      struct gl_context *ctx = exec->ctx;
264
265      if (ctx->Driver.FlushMappedBufferRange) {
266         GLintptr offset = exec->vtx.buffer_used - exec->vtx.bufferobj->Offset;
267         GLsizeiptr length = (exec->vtx.buffer_ptr - exec->vtx.buffer_map) * sizeof(float);
268
269         if (length)
270            ctx->Driver.FlushMappedBufferRange(ctx, target,
271                                               offset, length,
272                                               exec->vtx.bufferobj);
273      }
274
275      exec->vtx.buffer_used += (exec->vtx.buffer_ptr -
276                                exec->vtx.buffer_map) * sizeof(float);
277
278      assert(exec->vtx.buffer_used <= VBO_VERT_BUFFER_SIZE);
279      assert(exec->vtx.buffer_ptr != NULL);
280
281      ctx->Driver.UnmapBuffer(ctx, target, exec->vtx.bufferobj);
282      exec->vtx.buffer_map = NULL;
283      exec->vtx.buffer_ptr = NULL;
284      exec->vtx.max_vert = 0;
285   }
286}
287
288
289void
290vbo_exec_vtx_map( struct vbo_exec_context *exec )
291{
292   struct gl_context *ctx = exec->ctx;
293   const GLenum target = GL_ARRAY_BUFFER_ARB;
294   const GLenum access = GL_READ_WRITE_ARB; /* for MapBuffer */
295   const GLenum accessRange = GL_MAP_WRITE_BIT |  /* for MapBufferRange */
296                              GL_MAP_INVALIDATE_RANGE_BIT |
297                              GL_MAP_UNSYNCHRONIZED_BIT |
298                              GL_MAP_FLUSH_EXPLICIT_BIT |
299                              MESA_MAP_NOWAIT_BIT;
300   const GLenum usage = GL_STREAM_DRAW_ARB;
301
302   if (!_mesa_is_bufferobj(exec->vtx.bufferobj))
303      return;
304
305   if (exec->vtx.buffer_map != NULL) {
306      assert(0);
307      exec->vtx.buffer_map = NULL;
308      exec->vtx.buffer_ptr = NULL;
309   }
310
311   if (VBO_VERT_BUFFER_SIZE > exec->vtx.buffer_used + 1024 &&
312       ctx->Driver.MapBufferRange) {
313      exec->vtx.buffer_map =
314         (GLfloat *)ctx->Driver.MapBufferRange(ctx,
315                                               target,
316                                               exec->vtx.buffer_used,
317                                               (VBO_VERT_BUFFER_SIZE -
318                                                exec->vtx.buffer_used),
319                                               accessRange,
320                                               exec->vtx.bufferobj);
321      exec->vtx.buffer_ptr = exec->vtx.buffer_map;
322   }
323
324   if (!exec->vtx.buffer_map) {
325      exec->vtx.buffer_used = 0;
326
327      ctx->Driver.BufferData(ctx, target,
328                             VBO_VERT_BUFFER_SIZE,
329                             NULL, usage, exec->vtx.bufferobj);
330
331
332      if (ctx->Driver.MapBufferRange)
333         exec->vtx.buffer_map =
334            (GLfloat *)ctx->Driver.MapBufferRange(ctx, target,
335                                                  0, VBO_VERT_BUFFER_SIZE,
336                                                  accessRange,
337                                                  exec->vtx.bufferobj);
338      if (!exec->vtx.buffer_map)
339         exec->vtx.buffer_map =
340            (GLfloat *)ctx->Driver.MapBuffer(ctx, target, access, exec->vtx.bufferobj);
341      assert(exec->vtx.buffer_map);
342      exec->vtx.buffer_ptr = exec->vtx.buffer_map;
343   }
344
345   if (0)
346      printf("map %d..\n", exec->vtx.buffer_used);
347}
348
349
350
351/**
352 * Execute the buffer and save copied verts.
353 */
354void
355vbo_exec_vtx_flush( struct vbo_exec_context *exec, GLboolean unmap )
356{
357   if (0)
358      vbo_exec_debug_verts( exec );
359
360   if (exec->vtx.prim_count &&
361       exec->vtx.vert_count) {
362
363      exec->vtx.copied.nr = vbo_copy_vertices( exec );
364
365      if (exec->vtx.copied.nr != exec->vtx.vert_count) {
366	 struct gl_context *ctx = exec->ctx;
367
368	 /* Before the update_state() as this may raise _NEW_ARRAY
369          * from _mesa_set_varying_vp_inputs().
370	  */
371	 vbo_exec_bind_arrays( ctx );
372
373         if (ctx->NewState)
374            _mesa_update_state( ctx );
375
376         if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
377            vbo_exec_vtx_unmap( exec );
378         }
379
380         if (0)
381            printf("%s %d %d\n", __FUNCTION__, exec->vtx.prim_count,
382		   exec->vtx.vert_count);
383
384	 vbo_context(ctx)->draw_prims( ctx,
385				       exec->vtx.inputs,
386				       exec->vtx.prim,
387				       exec->vtx.prim_count,
388				       NULL,
389				       GL_TRUE,
390				       0,
391				       exec->vtx.vert_count - 1);
392
393	 /* If using a real VBO, get new storage -- unless asked not to.
394          */
395         if (_mesa_is_bufferobj(exec->vtx.bufferobj) && !unmap) {
396            vbo_exec_vtx_map( exec );
397         }
398      }
399   }
400
401   /* May have to unmap explicitly if we didn't draw:
402    */
403   if (unmap &&
404       _mesa_is_bufferobj(exec->vtx.bufferobj) &&
405       exec->vtx.buffer_map) {
406      vbo_exec_vtx_unmap( exec );
407   }
408
409
410   if (unmap || exec->vtx.vertex_size == 0)
411      exec->vtx.max_vert = 0;
412   else
413      exec->vtx.max_vert = ((VBO_VERT_BUFFER_SIZE - exec->vtx.buffer_used) /
414                            (exec->vtx.vertex_size * sizeof(GLfloat)));
415
416   exec->vtx.buffer_ptr = exec->vtx.buffer_map;
417   exec->vtx.prim_count = 0;
418   exec->vtx.vert_count = 0;
419}
420
421
422#endif /* FEATURE_beginend */
423