vbo_context.c revision e21096b07c5854d01114b58f87d08709e370f8b7 
1/*
2 * Mesa 3-D graphics library
3 * Version:  6.3
4 *
5 * Copyright (C) 1999-2005  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 "mtypes.h"
29#include "vbo.h"
30#include "vbo_context.h"
31#include "imports.h"
32#include "api_arrayelt.h"
33
34/* Reach out and grab this to use as the default:
35 */
36extern void _tnl_draw_prims( GLcontext *ctx,
37			     const struct gl_client_array *arrays[],
38			     const struct _mesa_prim *prims,
39			     GLuint nr_prims,
40			     const struct _mesa_index_buffer *ib,
41			     GLuint min_index,
42			     GLuint max_index );
43
44
45
46#define NR_LEGACY_ATTRIBS 16
47#define NR_GENERIC_ATTRIBS 16
48#define NR_MAT_ATTRIBS 12
49
50static GLuint check_size( const GLfloat *attr )
51{
52   if (attr[3] != 1.0) return 4;
53   if (attr[2] != 0.0) return 3;
54   if (attr[1] != 0.0) return 2;
55   return 1;
56}
57
58static void init_legacy_currval(GLcontext *ctx)
59{
60   struct vbo_context *vbo = vbo_context(ctx);
61   struct gl_client_array *arrays = vbo->legacy_currval;
62   GLuint i;
63
64   memset(arrays, 0, sizeof(*arrays) * NR_LEGACY_ATTRIBS);
65
66   /* Set up a constant (StrideB == 0) array for each current
67    * attribute:
68    */
69   for (i = 0; i < NR_LEGACY_ATTRIBS; i++) {
70      struct gl_client_array *cl = &arrays[i];
71
72      /* Size will have to be determined at runtime:
73       */
74      cl->Size = check_size(ctx->Current.Attrib[i]);
75      cl->Stride = 0;
76      cl->StrideB = 0;
77      cl->Enabled = 1;
78      cl->Type = GL_FLOAT;
79      cl->Ptr = (const void *)ctx->Current.Attrib[i];
80      cl->BufferObj = ctx->Array.NullBufferObj;
81   }
82}
83
84
85static void init_generic_currval(GLcontext *ctx)
86{
87   struct vbo_context *vbo = vbo_context(ctx);
88   struct gl_client_array *arrays = vbo->generic_currval;
89   GLuint i;
90
91   memset(arrays, 0, sizeof(*arrays) * NR_GENERIC_ATTRIBS);
92
93   for (i = 0; i < NR_GENERIC_ATTRIBS; i++) {
94      struct gl_client_array *cl = &arrays[i];
95
96      /* This will have to be determined at runtime:
97       */
98      cl->Size = 1;
99      cl->Type = GL_FLOAT;
100      cl->Ptr = (const void *)ctx->Current.Attrib[VERT_ATTRIB_GENERIC0 + i];
101      cl->Stride = 0;
102      cl->StrideB = 0;
103      cl->Enabled = 1;
104      cl->BufferObj = ctx->Array.NullBufferObj;
105   }
106}
107
108
109static void init_mat_currval(GLcontext *ctx)
110{
111   struct vbo_context *vbo = vbo_context(ctx);
112   struct gl_client_array *arrays = vbo->mat_currval;
113   GLuint i;
114
115   memset(arrays, 0, sizeof(*arrays) * NR_MAT_ATTRIBS);
116
117   /* Set up a constant (StrideB == 0) array for each current
118    * attribute:
119    */
120   for (i = 0; i < NR_MAT_ATTRIBS; i++) {
121      struct gl_client_array *cl = &arrays[i];
122
123      /* Size is fixed for the material attributes, for others will
124       * be determined at runtime:
125       */
126      switch (i - VERT_ATTRIB_GENERIC0) {
127      case MAT_ATTRIB_FRONT_SHININESS:
128      case MAT_ATTRIB_BACK_SHININESS:
129	 cl->Size = 1;
130	 break;
131      case MAT_ATTRIB_FRONT_INDEXES:
132      case MAT_ATTRIB_BACK_INDEXES:
133	 cl->Size = 3;
134	 break;
135      default:
136	 cl->Size = 4;
137	 break;
138      }
139
140      if (i < MAT_ATTRIB_MAX)
141	 cl->Ptr = (const void *)ctx->Light.Material.Attrib[i];
142      else
143	 cl->Ptr = (const void *)ctx->Current.Attrib[VERT_ATTRIB_GENERIC0 + i];
144
145      cl->Type = GL_FLOAT;
146      cl->Stride = 0;
147      cl->StrideB = 0;
148      cl->Enabled = 1;
149      cl->BufferObj = ctx->Array.NullBufferObj;
150   }
151}
152
153#if 0
154
155static void vbo_exec_current_init( struct vbo_exec_context *exec )
156{
157   GLcontext *ctx = exec->ctx;
158   GLint i;
159
160   /* setup the pointers for the typical 16 vertex attributes */
161   for (i = 0; i < VBO_ATTRIB_FIRST_MATERIAL; i++)
162      exec->vtx.current[i] = ctx->Current.Attrib[i];
163
164   /* setup pointers for the 12 material attributes */
165   for (i = 0; i < MAT_ATTRIB_MAX; i++)
166      exec->vtx.current[VBO_ATTRIB_FIRST_MATERIAL + i] =
167	 ctx->Light.Material.Attrib[i];
168}
169#endif
170
171GLboolean _vbo_CreateContext( GLcontext *ctx )
172{
173   struct vbo_context *vbo = CALLOC_STRUCT(vbo_context);
174
175   ctx->swtnl_im = (void *)vbo;
176
177   /* Initialize the arrayelt helper
178    */
179   if (!ctx->aelt_context &&
180       !_ae_create_context( ctx )) {
181      return GL_FALSE;
182   }
183
184   /* TODO: remove these pointers.
185    */
186   vbo->legacy_currval = &vbo->currval[VBO_ATTRIB_POS];
187   vbo->generic_currval = &vbo->currval[VBO_ATTRIB_GENERIC0];
188   vbo->mat_currval = &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT];
189
190   init_legacy_currval( ctx );
191   init_generic_currval( ctx );
192   init_mat_currval( ctx );
193
194   /* Build mappings from VERT_ATTRIB -> VBO_ATTRIB depending on type
195    * of vertex program active.
196    */
197   {
198      GLuint i;
199
200      /* When no vertex program, pull in the material attributes in
201       * the 16..32 generic range.
202       */
203      for (i = 0; i < 16; i++)
204	 vbo->map_vp_none[i] = i;
205      for (i = 0; i < 12; i++)
206	 vbo->map_vp_none[16+i] = VBO_ATTRIB_MAT_FRONT_AMBIENT + i;
207      for (i = 0; i < 4; i++)
208	 vbo->map_vp_none[28+i] = i;
209
210      for (i = 0; i < VERT_ATTRIB_MAX; i++)
211	 vbo->map_vp_arb[i] = i;
212   }
213
214
215   /* By default:
216    */
217   vbo->draw_prims = _tnl_draw_prims;
218
219   /* Hook our functions into exec and compile dispatch tables.  These
220    * will pretty much be permanently installed, which means that the
221    * vtxfmt mechanism can be removed now.
222    */
223   vbo_exec_init( ctx );
224   vbo_save_init( ctx );
225
226
227   return GL_TRUE;
228}
229
230void _vbo_InvalidateState( GLcontext *ctx, GLuint new_state )
231{
232   _ae_invalidate_state(ctx, new_state);
233   vbo_exec_invalidate_state(ctx, new_state);
234}
235
236
237void _vbo_DestroyContext( GLcontext *ctx )
238{
239   if (ctx->aelt_context) {
240      _ae_destroy_context( ctx );
241      ctx->aelt_context = NULL;
242   }
243
244   vbo_exec_destroy(ctx);
245   FREE(vbo_context(ctx));
246   ctx->swtnl_im = NULL;
247}
248