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 "main/imports.h"
29#include "main/mtypes.h"
30#include "main/api_arrayelt.h"
31#include "main/bufferobj.h"
32#include "math/m_eval.h"
33#include "vbo.h"
34#include "vbo_context.h"
35
36#define NR_MAT_ATTRIBS 12
37
38static GLuint check_size( const GLfloat *attr )
39{
40   if (attr[3] != 1.0) return 4;
41   if (attr[2] != 0.0) return 3;
42   if (attr[1] != 0.0) return 2;
43   return 1;
44}
45
46
47static void init_legacy_currval(struct gl_context *ctx)
48{
49   struct vbo_context *vbo = vbo_context(ctx);
50   struct gl_client_array *arrays = &vbo->currval[VBO_ATTRIB_POS];
51   GLuint i;
52
53   memset(arrays, 0, sizeof(*arrays) * VERT_ATTRIB_FF_MAX);
54
55   /* Set up a constant (StrideB == 0) array for each current
56    * attribute:
57    */
58   for (i = 0; i < VERT_ATTRIB_FF_MAX; i++) {
59      struct gl_client_array *cl = &arrays[i];
60
61      /* Size will have to be determined at runtime:
62       */
63      cl->Size = check_size(ctx->Current.Attrib[i]);
64      cl->Stride = 0;
65      cl->StrideB = 0;
66      cl->Enabled = 1;
67      cl->Type = GL_FLOAT;
68      cl->Format = GL_RGBA;
69      cl->Ptr = (const void *)ctx->Current.Attrib[i];
70      cl->_ElementSize = cl->Size * sizeof(GLfloat);
71      _mesa_reference_buffer_object(ctx, &cl->BufferObj,
72                                    ctx->Shared->NullBufferObj);
73   }
74}
75
76
77static void init_generic_currval(struct gl_context *ctx)
78{
79   struct vbo_context *vbo = vbo_context(ctx);
80   struct gl_client_array *arrays = &vbo->currval[VBO_ATTRIB_GENERIC0];
81   GLuint i;
82
83   memset(arrays, 0, sizeof(*arrays) * VERT_ATTRIB_GENERIC_MAX);
84
85   for (i = 0; i < VERT_ATTRIB_GENERIC_MAX; i++) {
86      struct gl_client_array *cl = &arrays[i];
87
88      /* This will have to be determined at runtime:
89       */
90      cl->Size = 1;
91      cl->Type = GL_FLOAT;
92      cl->Format = GL_RGBA;
93      cl->Ptr = (const void *)ctx->Current.Attrib[VERT_ATTRIB_GENERIC0 + i];
94      cl->Stride = 0;
95      cl->StrideB = 0;
96      cl->Enabled = 1;
97      cl->_ElementSize = cl->Size * sizeof(GLfloat);
98      _mesa_reference_buffer_object(ctx, &cl->BufferObj,
99                                    ctx->Shared->NullBufferObj);
100   }
101}
102
103
104static void init_mat_currval(struct gl_context *ctx)
105{
106   struct vbo_context *vbo = vbo_context(ctx);
107   struct gl_client_array *arrays =
108      &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT];
109   GLuint i;
110
111   ASSERT(NR_MAT_ATTRIBS == MAT_ATTRIB_MAX);
112
113   memset(arrays, 0, sizeof(*arrays) * NR_MAT_ATTRIBS);
114
115   /* Set up a constant (StrideB == 0) array for each current
116    * attribute:
117    */
118   for (i = 0; i < NR_MAT_ATTRIBS; i++) {
119      struct gl_client_array *cl = &arrays[i];
120
121      /* Size is fixed for the material attributes, for others will
122       * be determined at runtime:
123       */
124      switch (i - VERT_ATTRIB_GENERIC0) {
125      case MAT_ATTRIB_FRONT_SHININESS:
126      case MAT_ATTRIB_BACK_SHININESS:
127	 cl->Size = 1;
128	 break;
129      case MAT_ATTRIB_FRONT_INDEXES:
130      case MAT_ATTRIB_BACK_INDEXES:
131	 cl->Size = 3;
132	 break;
133      default:
134	 cl->Size = 4;
135	 break;
136      }
137
138      cl->Ptr = (const void *)ctx->Light.Material.Attrib[i];
139      cl->Type = GL_FLOAT;
140      cl->Format = GL_RGBA;
141      cl->Stride = 0;
142      cl->StrideB = 0;
143      cl->Enabled = 1;
144      cl->_ElementSize = cl->Size * sizeof(GLfloat);
145      _mesa_reference_buffer_object(ctx, &cl->BufferObj,
146                                    ctx->Shared->NullBufferObj);
147   }
148}
149
150
151GLboolean _vbo_CreateContext( struct gl_context *ctx )
152{
153   struct vbo_context *vbo = CALLOC_STRUCT(vbo_context);
154
155   ctx->swtnl_im = (void *)vbo;
156
157   /* Initialize the arrayelt helper
158    */
159   if (!ctx->aelt_context &&
160       !_ae_create_context( ctx )) {
161      return GL_FALSE;
162   }
163
164   init_legacy_currval( ctx );
165   init_generic_currval( ctx );
166   init_mat_currval( ctx );
167
168   /* Build mappings from VERT_ATTRIB -> VBO_ATTRIB depending on type
169    * of vertex program active.
170    */
171   {
172      GLuint i;
173
174      /* identity mapping */
175      for (i = 0; i < Elements(vbo->map_vp_none); i++)
176	 vbo->map_vp_none[i] = i;
177      /* map material attribs to generic slots */
178      for (i = 0; i < NR_MAT_ATTRIBS; i++)
179	 vbo->map_vp_none[VERT_ATTRIB_GENERIC(i)]
180            = VBO_ATTRIB_MAT_FRONT_AMBIENT + i;
181
182      for (i = 0; i < Elements(vbo->map_vp_arb); i++)
183	 vbo->map_vp_arb[i] = i;
184   }
185
186
187   /* Hook our functions into exec and compile dispatch tables.  These
188    * will pretty much be permanently installed, which means that the
189    * vtxfmt mechanism can be removed now.
190    */
191   vbo_exec_init( ctx );
192   if (ctx->API == API_OPENGL)
193      vbo_save_init( ctx );
194
195   _math_init_eval();
196
197   return GL_TRUE;
198}
199
200
201void _vbo_InvalidateState( struct gl_context *ctx, GLuint new_state )
202{
203   vbo_exec_invalidate_state(ctx, new_state);
204}
205
206
207void _vbo_DestroyContext( struct gl_context *ctx )
208{
209   struct vbo_context *vbo = vbo_context(ctx);
210
211   if (ctx->aelt_context) {
212      _ae_destroy_context( ctx );
213      ctx->aelt_context = NULL;
214   }
215
216   if (vbo) {
217      GLuint i;
218
219      for (i = 0; i < VBO_ATTRIB_MAX; i++) {
220         _mesa_reference_buffer_object(ctx, &vbo->currval[i].BufferObj, NULL);
221      }
222
223      vbo_exec_destroy(ctx);
224      if (ctx->API == API_OPENGL)
225         vbo_save_destroy(ctx);
226      FREE(vbo);
227      ctx->swtnl_im = NULL;
228   }
229}
230
231
232void vbo_set_draw_func(struct gl_context *ctx, vbo_draw_func func)
233{
234   struct vbo_context *vbo = vbo_context(ctx);
235   vbo->draw_prims = func;
236}
237
238