vbo_exec_draw.c revision 2708ddfb06a36d8568e2aa130bf1f7d551fcd309 
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/context.h"
31#include "main/enums.h"
32#include "main/state.h"
33#include "main/macros.h"
34
35#include "vbo_context.h"
36
37
38static void
39vbo_exec_debug_verts( struct vbo_exec_context *exec )
40{
41   GLuint count = exec->vtx.vert_count;
42   GLuint i;
43
44   _mesa_printf("%s: %u vertices %d primitives, %d vertsize\n",
45		__FUNCTION__,
46		count,
47		exec->vtx.prim_count,
48		exec->vtx.vertex_size);
49
50   for (i = 0 ; i < exec->vtx.prim_count ; i++) {
51      struct _mesa_prim *prim = &exec->vtx.prim[i];
52      _mesa_printf("   prim %d: %s%s %d..%d %s %s\n",
53		   i,
54		   _mesa_lookup_prim_by_nr(prim->mode),
55		   prim->weak ? " (weak)" : "",
56		   prim->start,
57		   prim->start + prim->count,
58		   prim->begin ? "BEGIN" : "(wrap)",
59		   prim->end ? "END" : "(wrap)");
60   }
61}
62
63
64/*
65 * NOTE: Need to have calculated primitives by this point -- do it on the fly.
66 * NOTE: Old 'parity' issue is gone.
67 */
68static GLuint
69vbo_copy_vertices( struct vbo_exec_context *exec )
70{
71   GLuint nr = exec->vtx.prim[exec->vtx.prim_count-1].count;
72   GLuint ovf, i;
73   GLuint sz = exec->vtx.vertex_size;
74   GLfloat *dst = exec->vtx.copied.buffer;
75   const GLfloat *src = (exec->vtx.buffer_map +
76                         exec->vtx.prim[exec->vtx.prim_count-1].start *
77                         exec->vtx.vertex_size);
78
79
80   switch (exec->ctx->Driver.CurrentExecPrimitive) {
81   case GL_POINTS:
82      return 0;
83   case GL_LINES:
84      ovf = nr&1;
85      for (i = 0 ; i < ovf ; i++)
86	 _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
87      return i;
88   case GL_TRIANGLES:
89      ovf = nr%3;
90      for (i = 0 ; i < ovf ; i++)
91	 _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
92      return i;
93   case GL_QUADS:
94      ovf = nr&3;
95      for (i = 0 ; i < ovf ; i++)
96	 _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
97      return i;
98   case GL_LINE_STRIP:
99      if (nr == 0) {
100	 return 0;
101      }
102      else {
103	 _mesa_memcpy( dst, src+(nr-1)*sz, sz * sizeof(GLfloat) );
104	 return 1;
105      }
106   case GL_LINE_LOOP:
107   case GL_TRIANGLE_FAN:
108   case GL_POLYGON:
109      if (nr == 0) {
110	 return 0;
111      }
112      else if (nr == 1) {
113	 _mesa_memcpy( dst, src+0, sz * sizeof(GLfloat) );
114	 return 1;
115      }
116      else {
117	 _mesa_memcpy( dst, src+0, sz * sizeof(GLfloat) );
118	 _mesa_memcpy( dst+sz, src+(nr-1)*sz, sz * sizeof(GLfloat) );
119	 return 2;
120      }
121   case GL_TRIANGLE_STRIP:
122      /* no parity issue, but need to make sure the tri is not drawn twice */
123      if (nr & 1) {
124	 exec->vtx.prim[exec->vtx.prim_count-1].count--;
125      }
126      /* fallthrough */
127   case GL_QUAD_STRIP:
128      switch (nr) {
129      case 0:
130         ovf = 0;
131         break;
132      case 1:
133         ovf = 1;
134         break;
135      default:
136         ovf = 2 + (nr & 1);
137         break;
138      }
139      for (i = 0 ; i < ovf ; i++)
140	 _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
141      return i;
142   case PRIM_OUTSIDE_BEGIN_END:
143      return 0;
144   default:
145      assert(0);
146      return 0;
147   }
148}
149
150
151
152/* TODO: populate these as the vertex is defined:
153 */
154static void
155vbo_exec_bind_arrays( GLcontext *ctx )
156{
157   struct vbo_context *vbo = vbo_context(ctx);
158   struct vbo_exec_context *exec = &vbo->exec;
159   struct gl_client_array *arrays = exec->vtx.arrays;
160   const GLuint count = exec->vtx.vert_count;
161   const GLubyte *data = (GLubyte *) exec->vtx.buffer_map;
162   const GLuint *map;
163   GLuint attr;
164   GLbitfield varying_inputs = 0x0;
165
166   /* Install the default (ie Current) attributes first, then overlay
167    * all active ones.
168    */
169   switch (get_program_mode(exec->ctx)) {
170   case VP_NONE:
171      for (attr = 0; attr < 16; attr++) {
172         exec->vtx.inputs[attr] = &vbo->legacy_currval[attr];
173      }
174      for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) {
175         exec->vtx.inputs[attr + 16] = &vbo->mat_currval[attr];
176      }
177      map = vbo->map_vp_none;
178      break;
179   case VP_NV:
180   case VP_ARB:
181      /* The aliasing of attributes for NV vertex programs has already
182       * occurred.  NV vertex programs cannot access material values,
183       * nor attributes greater than VERT_ATTRIB_TEX7.
184       */
185      for (attr = 0; attr < 16; attr++) {
186         exec->vtx.inputs[attr] = &vbo->legacy_currval[attr];
187         exec->vtx.inputs[attr + 16] = &vbo->generic_currval[attr];
188      }
189      map = vbo->map_vp_arb;
190
191      /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read.
192       * In that case we effectively need to route the data from
193       * glVertexAttrib(0, val) calls to feed into the GENERIC0 input.
194       */
195      if ((ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_POS) == 0 &&
196          (ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_GENERIC0)) {
197         exec->vtx.inputs[16] = exec->vtx.inputs[0];
198         exec->vtx.attrsz[16] = exec->vtx.attrsz[0];
199         exec->vtx.attrptr[16] = exec->vtx.attrptr[0];
200         exec->vtx.attrsz[0] = 0;
201      }
202      break;
203   default:
204      assert(0);
205   }
206
207   /* Make all active attributes (including edgeflag) available as
208    * arrays of floats.
209    */
210   for (attr = 0; attr < VERT_ATTRIB_MAX ; attr++) {
211      const GLuint src = map[attr];
212
213      if (exec->vtx.attrsz[src]) {
214         /* override the default array set above */
215         exec->vtx.inputs[attr] = &arrays[attr];
216
217         if (exec->vtx.bufferobj->Name) {
218            /* a real buffer obj: Ptr is an offset, not a pointer*/
219            GLsizeiptr offset;
220            assert(exec->vtx.bufferobj->Pointer);  /* buf should be mapped */
221            offset = (GLbyte *) data - (GLbyte *) exec->vtx.bufferobj->Pointer;
222            assert(offset >= 0);
223            arrays[attr].Ptr = (void *) offset;
224         }
225         else {
226            /* Ptr into ordinary app memory */
227            arrays[attr].Ptr = (void *) data;
228         }
229	 arrays[attr].Size = exec->vtx.attrsz[src];
230	 arrays[attr].StrideB = exec->vtx.vertex_size * sizeof(GLfloat);
231	 arrays[attr].Stride = exec->vtx.vertex_size * sizeof(GLfloat);
232	 arrays[attr].Type = GL_FLOAT;
233         arrays[attr].Format = GL_RGBA;
234	 arrays[attr].Enabled = 1;
235         _mesa_reference_buffer_object(ctx,
236                                       &arrays[attr].BufferObj,
237                                       exec->vtx.bufferobj);
238	 arrays[attr]._MaxElement = count; /* ??? */
239
240	 data += exec->vtx.attrsz[src] * sizeof(GLfloat);
241         varying_inputs |= 1 << attr;
242      }
243   }
244
245   _mesa_set_varying_vp_inputs( ctx, varying_inputs );
246}
247
248
249static void
250vbo_exec_vtx_unmap( struct vbo_exec_context *exec )
251{
252   GLenum target = GL_ARRAY_BUFFER_ARB;
253
254   if (exec->vtx.bufferobj->Name) {
255      GLcontext *ctx = exec->ctx;
256
257      if (ctx->Driver.FlushMappedBufferRange) {
258         GLintptr offset = exec->vtx.buffer_used - exec->vtx.bufferobj->Offset;
259         GLsizeiptr length = (exec->vtx.buffer_ptr - exec->vtx.buffer_map) * sizeof(float);
260
261         if (length)
262            ctx->Driver.FlushMappedBufferRange(ctx, target,
263                                               offset, length,
264                                               exec->vtx.bufferobj);
265      }
266
267      exec->vtx.buffer_used += (exec->vtx.buffer_ptr -
268                                exec->vtx.buffer_map) * sizeof(float);
269
270      assert(exec->vtx.buffer_used <= VBO_VERT_BUFFER_SIZE);
271      assert(exec->vtx.buffer_ptr != NULL);
272
273      ctx->Driver.UnmapBuffer(ctx, target, exec->vtx.bufferobj);
274      exec->vtx.buffer_map = NULL;
275      exec->vtx.buffer_ptr = NULL;
276      exec->vtx.max_vert = 0;
277   }
278}
279
280
281void
282vbo_exec_vtx_map( struct vbo_exec_context *exec )
283{
284   GLcontext *ctx = exec->ctx;
285   const GLenum target = GL_ARRAY_BUFFER_ARB;
286   const GLenum access = GL_READ_WRITE_ARB; /* for MapBuffer */
287   const GLenum accessRange = GL_MAP_WRITE_BIT |  /* for MapBufferRange */
288                              GL_MAP_INVALIDATE_RANGE_BIT |
289                              GL_MAP_UNSYNCHRONIZED_BIT |
290                              GL_MAP_FLUSH_EXPLICIT_BIT |
291                              MESA_MAP_NOWAIT_BIT;
292   const GLenum usage = GL_STREAM_DRAW_ARB;
293
294   if (exec->vtx.bufferobj->Name == 0)
295      return;
296
297   if (exec->vtx.buffer_map != NULL) {
298      assert(0);
299      exec->vtx.buffer_map = NULL;
300      exec->vtx.buffer_ptr = NULL;
301   }
302
303   if (VBO_VERT_BUFFER_SIZE > exec->vtx.buffer_used + 1024 &&
304       ctx->Driver.MapBufferRange) {
305      exec->vtx.buffer_map =
306         (GLfloat *)ctx->Driver.MapBufferRange(ctx,
307                                               target,
308                                               exec->vtx.buffer_used,
309                                               (VBO_VERT_BUFFER_SIZE -
310                                                exec->vtx.buffer_used),
311                                               accessRange,
312                                               exec->vtx.bufferobj);
313      exec->vtx.buffer_ptr = exec->vtx.buffer_map;
314   }
315
316   if (!exec->vtx.buffer_map) {
317      exec->vtx.buffer_used = 0;
318
319      ctx->Driver.BufferData(ctx, target,
320                             VBO_VERT_BUFFER_SIZE,
321                             NULL, usage, exec->vtx.bufferobj);
322
323
324      if (ctx->Driver.MapBufferRange)
325         exec->vtx.buffer_map =
326            (GLfloat *)ctx->Driver.MapBufferRange(ctx, target,
327                                                  0, VBO_VERT_BUFFER_SIZE,
328                                                  accessRange,
329                                                  exec->vtx.bufferobj);
330      if (!exec->vtx.buffer_map)
331         exec->vtx.buffer_map =
332            (GLfloat *)ctx->Driver.MapBuffer(ctx, target, access, exec->vtx.bufferobj);
333      assert(exec->vtx.buffer_map);
334      exec->vtx.buffer_ptr = exec->vtx.buffer_map;
335   }
336
337   if (0)
338      _mesa_printf("map %d..\n", exec->vtx.buffer_used);
339}
340
341
342
343/**
344 * Execute the buffer and save copied verts.
345 */
346void
347vbo_exec_vtx_flush( struct vbo_exec_context *exec, GLboolean unmap )
348{
349   if (0)
350      vbo_exec_debug_verts( exec );
351
352   if (exec->vtx.prim_count &&
353       exec->vtx.vert_count) {
354
355      exec->vtx.copied.nr = vbo_copy_vertices( exec );
356
357      if (exec->vtx.copied.nr != exec->vtx.vert_count) {
358	 GLcontext *ctx = exec->ctx;
359
360	 /* Before the update_state() as this may raise _NEW_ARRAY
361          * from _mesa_set_varying_vp_inputs().
362	  */
363	 vbo_exec_bind_arrays( ctx );
364
365         if (ctx->NewState)
366            _mesa_update_state( ctx );
367
368         if (exec->vtx.bufferobj->Name) {
369            vbo_exec_vtx_unmap( exec );
370         }
371
372         if (0)
373            _mesa_printf("%s %d %d\n", __FUNCTION__, exec->vtx.prim_count,
374                         exec->vtx.vert_count);
375
376	 vbo_context(ctx)->draw_prims( ctx,
377				       exec->vtx.inputs,
378				       exec->vtx.prim,
379				       exec->vtx.prim_count,
380				       NULL,
381				       GL_TRUE,
382				       0,
383				       exec->vtx.vert_count - 1);
384
385	 /* If using a real VBO, get new storage -- unless asked not to.
386          */
387         if (exec->vtx.bufferobj->Name && !unmap) {
388            vbo_exec_vtx_map( exec );
389         }
390      }
391   }
392
393   /* May have to unmap explicitly if we didn't draw:
394    */
395   if (unmap &&
396       exec->vtx.bufferobj->Name &&
397       exec->vtx.buffer_map) {
398      vbo_exec_vtx_unmap( exec );
399   }
400
401   if (unmap)
402      exec->vtx.max_vert = 0;
403   else
404      exec->vtx.max_vert = ((VBO_VERT_BUFFER_SIZE - exec->vtx.buffer_used) /
405                            (exec->vtx.vertex_size * sizeof(GLfloat)));
406
407   exec->vtx.buffer_ptr = exec->vtx.buffer_map;
408   exec->vtx.prim_count = 0;
409   exec->vtx.vert_count = 0;
410}
411