vbo_exec_draw.c revision 898de4a9d5e47ed32c600e5907476fd9338aa7e9 
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
38#if FEATURE_beginend
39
40
41static void
42vbo_exec_debug_verts( struct vbo_exec_context *exec )
43{
44   GLuint count = exec->vtx.vert_count;
45   GLuint i;
46
47   _mesa_printf("%s: %u vertices %d primitives, %d vertsize\n",
48		__FUNCTION__,
49		count,
50		exec->vtx.prim_count,
51		exec->vtx.vertex_size);
52
53   for (i = 0 ; i < exec->vtx.prim_count ; i++) {
54      struct _mesa_prim *prim = &exec->vtx.prim[i];
55      _mesa_printf("   prim %d: %s%s %d..%d %s %s\n",
56		   i,
57		   _mesa_lookup_prim_by_nr(prim->mode),
58		   prim->weak ? " (weak)" : "",
59		   prim->start,
60		   prim->start + prim->count,
61		   prim->begin ? "BEGIN" : "(wrap)",
62		   prim->end ? "END" : "(wrap)");
63   }
64}
65
66
67/*
68 * NOTE: Need to have calculated primitives by this point -- do it on the fly.
69 * NOTE: Old 'parity' issue is gone.
70 */
71static GLuint
72vbo_copy_vertices( struct vbo_exec_context *exec )
73{
74   GLuint nr = exec->vtx.prim[exec->vtx.prim_count-1].count;
75   GLuint ovf, i;
76   GLuint sz = exec->vtx.vertex_size;
77   GLfloat *dst = exec->vtx.copied.buffer;
78   const GLfloat *src = (exec->vtx.buffer_map +
79                         exec->vtx.prim[exec->vtx.prim_count-1].start *
80                         exec->vtx.vertex_size);
81
82
83   switch (exec->ctx->Driver.CurrentExecPrimitive) {
84   case GL_POINTS:
85      return 0;
86   case GL_LINES:
87      ovf = nr&1;
88      for (i = 0 ; i < ovf ; i++)
89	 _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
90      return i;
91   case GL_TRIANGLES:
92      ovf = nr%3;
93      for (i = 0 ; i < ovf ; i++)
94	 _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
95      return i;
96   case GL_QUADS:
97      ovf = nr&3;
98      for (i = 0 ; i < ovf ; i++)
99	 _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
100      return i;
101   case GL_LINE_STRIP:
102      if (nr == 0) {
103	 return 0;
104      }
105      else {
106	 _mesa_memcpy( dst, src+(nr-1)*sz, sz * sizeof(GLfloat) );
107	 return 1;
108      }
109   case GL_LINE_LOOP:
110   case GL_TRIANGLE_FAN:
111   case GL_POLYGON:
112      if (nr == 0) {
113	 return 0;
114      }
115      else if (nr == 1) {
116	 _mesa_memcpy( dst, src+0, sz * sizeof(GLfloat) );
117	 return 1;
118      }
119      else {
120	 _mesa_memcpy( dst, src+0, sz * sizeof(GLfloat) );
121	 _mesa_memcpy( dst+sz, src+(nr-1)*sz, sz * sizeof(GLfloat) );
122	 return 2;
123      }
124   case GL_TRIANGLE_STRIP:
125      /* no parity issue, but need to make sure the tri is not drawn twice */
126      if (nr & 1) {
127	 exec->vtx.prim[exec->vtx.prim_count-1].count--;
128      }
129      /* fallthrough */
130   case GL_QUAD_STRIP:
131      switch (nr) {
132      case 0:
133         ovf = 0;
134         break;
135      case 1:
136         ovf = 1;
137         break;
138      default:
139         ovf = 2 + (nr & 1);
140         break;
141      }
142      for (i = 0 ; i < ovf ; i++)
143	 _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
144      return i;
145   case PRIM_OUTSIDE_BEGIN_END:
146      return 0;
147   default:
148      assert(0);
149      return 0;
150   }
151}
152
153
154
155/* TODO: populate these as the vertex is defined:
156 */
157static void
158vbo_exec_bind_arrays( GLcontext *ctx )
159{
160   struct vbo_context *vbo = vbo_context(ctx);
161   struct vbo_exec_context *exec = &vbo->exec;
162   struct gl_client_array *arrays = exec->vtx.arrays;
163   const GLuint count = exec->vtx.vert_count;
164   const GLubyte *data = (GLubyte *) exec->vtx.buffer_map;
165   const GLuint *map;
166   GLuint attr;
167   GLbitfield varying_inputs = 0x0;
168
169   /* Install the default (ie Current) attributes first, then overlay
170    * all active ones.
171    */
172   switch (get_program_mode(exec->ctx)) {
173   case VP_NONE:
174      for (attr = 0; attr < 16; attr++) {
175         exec->vtx.inputs[attr] = &vbo->legacy_currval[attr];
176      }
177      for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) {
178         ASSERT(attr + 16 < Elements(exec->vtx.inputs));
179         exec->vtx.inputs[attr + 16] = &vbo->mat_currval[attr];
180      }
181      map = vbo->map_vp_none;
182      break;
183   case VP_NV:
184   case VP_ARB:
185      /* The aliasing of attributes for NV vertex programs has already
186       * occurred.  NV vertex programs cannot access material values,
187       * nor attributes greater than VERT_ATTRIB_TEX7.
188       */
189      for (attr = 0; attr < 16; attr++) {
190         exec->vtx.inputs[attr] = &vbo->legacy_currval[attr];
191         ASSERT(attr + 16 < Elements(exec->vtx.inputs));
192         exec->vtx.inputs[attr + 16] = &vbo->generic_currval[attr];
193      }
194      map = vbo->map_vp_arb;
195
196      /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read.
197       * In that case we effectively need to route the data from
198       * glVertexAttrib(0, val) calls to feed into the GENERIC0 input.
199       */
200      if ((ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_POS) == 0 &&
201          (ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_GENERIC0)) {
202         exec->vtx.inputs[16] = exec->vtx.inputs[0];
203         exec->vtx.attrsz[16] = exec->vtx.attrsz[0];
204         exec->vtx.attrptr[16] = exec->vtx.attrptr[0];
205         exec->vtx.attrsz[0] = 0;
206      }
207      break;
208   default:
209      assert(0);
210   }
211
212   /* Make all active attributes (including edgeflag) available as
213    * arrays of floats.
214    */
215   for (attr = 0; attr < VERT_ATTRIB_MAX ; attr++) {
216      const GLuint src = map[attr];
217
218      if (exec->vtx.attrsz[src]) {
219         /* override the default array set above */
220         ASSERT(attr < Elements(exec->vtx.inputs));
221         ASSERT(attr < Elements(exec->vtx.arrays)); /* arrays[] */
222         exec->vtx.inputs[attr] = &arrays[attr];
223
224         if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
225            /* a real buffer obj: Ptr is an offset, not a pointer*/
226            GLsizeiptr offset;
227            assert(exec->vtx.bufferobj->Pointer);  /* buf should be mapped */
228            offset = (GLbyte *) data -
229	       (GLbyte *) exec->vtx.bufferobj->Pointer +
230	       exec->vtx.bufferobj->Offset;
231            assert(offset >= 0);
232            arrays[attr].Ptr = (void *) offset;
233         }
234         else {
235            /* Ptr into ordinary app memory */
236            arrays[attr].Ptr = (void *) data;
237         }
238	 arrays[attr].Size = exec->vtx.attrsz[src];
239	 arrays[attr].StrideB = exec->vtx.vertex_size * sizeof(GLfloat);
240	 arrays[attr].Stride = exec->vtx.vertex_size * sizeof(GLfloat);
241	 arrays[attr].Type = GL_FLOAT;
242         arrays[attr].Format = GL_RGBA;
243	 arrays[attr].Enabled = 1;
244         _mesa_reference_buffer_object(ctx,
245                                       &arrays[attr].BufferObj,
246                                       exec->vtx.bufferobj);
247	 arrays[attr]._MaxElement = count; /* ??? */
248
249	 data += exec->vtx.attrsz[src] * sizeof(GLfloat);
250         varying_inputs |= 1 << attr;
251      }
252   }
253
254   _mesa_set_varying_vp_inputs( ctx, varying_inputs );
255}
256
257
258static void
259vbo_exec_vtx_unmap( struct vbo_exec_context *exec )
260{
261   GLenum target = GL_ARRAY_BUFFER_ARB;
262
263   if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
264      GLcontext *ctx = exec->ctx;
265
266      if (ctx->Driver.FlushMappedBufferRange) {
267         GLintptr offset = exec->vtx.buffer_used - exec->vtx.bufferobj->Offset;
268         GLsizeiptr length = (exec->vtx.buffer_ptr - exec->vtx.buffer_map) * sizeof(float);
269
270         if (length)
271            ctx->Driver.FlushMappedBufferRange(ctx, target,
272                                               offset, length,
273                                               exec->vtx.bufferobj);
274      }
275
276      exec->vtx.buffer_used += (exec->vtx.buffer_ptr -
277                                exec->vtx.buffer_map) * sizeof(float);
278
279      assert(exec->vtx.buffer_used <= VBO_VERT_BUFFER_SIZE);
280      assert(exec->vtx.buffer_ptr != NULL);
281
282      ctx->Driver.UnmapBuffer(ctx, target, exec->vtx.bufferobj);
283      exec->vtx.buffer_map = NULL;
284      exec->vtx.buffer_ptr = NULL;
285      exec->vtx.max_vert = 0;
286   }
287}
288
289
290void
291vbo_exec_vtx_map( struct vbo_exec_context *exec )
292{
293   GLcontext *ctx = exec->ctx;
294   const GLenum target = GL_ARRAY_BUFFER_ARB;
295   const GLenum access = GL_READ_WRITE_ARB; /* for MapBuffer */
296   const GLenum accessRange = GL_MAP_WRITE_BIT |  /* for MapBufferRange */
297                              GL_MAP_INVALIDATE_RANGE_BIT |
298                              GL_MAP_UNSYNCHRONIZED_BIT |
299                              GL_MAP_FLUSH_EXPLICIT_BIT |
300                              MESA_MAP_NOWAIT_BIT;
301   const GLenum usage = GL_STREAM_DRAW_ARB;
302
303   if (!_mesa_is_bufferobj(exec->vtx.bufferobj))
304      return;
305
306   if (exec->vtx.buffer_map != NULL) {
307      assert(0);
308      exec->vtx.buffer_map = NULL;
309      exec->vtx.buffer_ptr = NULL;
310   }
311
312   if (VBO_VERT_BUFFER_SIZE > exec->vtx.buffer_used + 1024 &&
313       ctx->Driver.MapBufferRange) {
314      exec->vtx.buffer_map =
315         (GLfloat *)ctx->Driver.MapBufferRange(ctx,
316                                               target,
317                                               exec->vtx.buffer_used,
318                                               (VBO_VERT_BUFFER_SIZE -
319                                                exec->vtx.buffer_used),
320                                               accessRange,
321                                               exec->vtx.bufferobj);
322      exec->vtx.buffer_ptr = exec->vtx.buffer_map;
323   }
324
325   if (!exec->vtx.buffer_map) {
326      exec->vtx.buffer_used = 0;
327
328      ctx->Driver.BufferData(ctx, target,
329                             VBO_VERT_BUFFER_SIZE,
330                             NULL, usage, exec->vtx.bufferobj);
331
332
333      if (ctx->Driver.MapBufferRange)
334         exec->vtx.buffer_map =
335            (GLfloat *)ctx->Driver.MapBufferRange(ctx, target,
336                                                  0, VBO_VERT_BUFFER_SIZE,
337                                                  accessRange,
338                                                  exec->vtx.bufferobj);
339      if (!exec->vtx.buffer_map)
340         exec->vtx.buffer_map =
341            (GLfloat *)ctx->Driver.MapBuffer(ctx, target, access, exec->vtx.bufferobj);
342      assert(exec->vtx.buffer_map);
343      exec->vtx.buffer_ptr = exec->vtx.buffer_map;
344   }
345
346   if (0)
347      _mesa_printf("map %d..\n", exec->vtx.buffer_used);
348}
349
350
351
352/**
353 * Execute the buffer and save copied verts.
354 */
355void
356vbo_exec_vtx_flush( struct vbo_exec_context *exec, GLboolean unmap )
357{
358   if (0)
359      vbo_exec_debug_verts( exec );
360
361   if (exec->vtx.prim_count &&
362       exec->vtx.vert_count) {
363
364      exec->vtx.copied.nr = vbo_copy_vertices( exec );
365
366      if (exec->vtx.copied.nr != exec->vtx.vert_count) {
367	 GLcontext *ctx = exec->ctx;
368
369	 /* Before the update_state() as this may raise _NEW_ARRAY
370          * from _mesa_set_varying_vp_inputs().
371	  */
372	 vbo_exec_bind_arrays( ctx );
373
374         if (ctx->NewState)
375            _mesa_update_state( ctx );
376
377         if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
378            vbo_exec_vtx_unmap( exec );
379         }
380
381         if (0)
382            _mesa_printf("%s %d %d\n", __FUNCTION__, exec->vtx.prim_count,
383                         exec->vtx.vert_count);
384
385	 vbo_context(ctx)->draw_prims( ctx,
386				       exec->vtx.inputs,
387				       exec->vtx.prim,
388				       exec->vtx.prim_count,
389				       NULL,
390				       GL_TRUE,
391				       0,
392				       exec->vtx.vert_count - 1);
393
394	 /* If using a real VBO, get new storage -- unless asked not to.
395          */
396         if (_mesa_is_bufferobj(exec->vtx.bufferobj) && !unmap) {
397            vbo_exec_vtx_map( exec );
398         }
399      }
400   }
401
402   /* May have to unmap explicitly if we didn't draw:
403    */
404   if (unmap &&
405       _mesa_is_bufferobj(exec->vtx.bufferobj) &&
406       exec->vtx.buffer_map) {
407      vbo_exec_vtx_unmap( exec );
408   }
409
410
411   if (unmap || exec->vtx.vertex_size == 0)
412      exec->vtx.max_vert = 0;
413   else
414      exec->vtx.max_vert = ((VBO_VERT_BUFFER_SIZE - exec->vtx.buffer_used) /
415                            (exec->vtx.vertex_size * sizeof(GLfloat)));
416
417   exec->vtx.buffer_ptr = exec->vtx.buffer_map;
418   exec->vtx.prim_count = 0;
419   exec->vtx.vert_count = 0;
420}
421
422
423#endif /* FEATURE_beginend */
424