vbo_context.c revision 01e04c3f 
1/*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2005  Brian Paul   All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors:
25 *    Keith Whitwell <keithw@vmware.com>
26 */
27
28#include "main/errors.h"
29#include "main/bufferobj.h"
30#include "math/m_eval.h"
31#include "main/vtxfmt.h"
32#include "main/api_arrayelt.h"
33#include "main/arrayobj.h"
34#include "main/varray.h"
35#include "vbo.h"
36#include "vbo_private.h"
37
38
39static GLuint
40check_size(const GLfloat *attr)
41{
42   if (attr[3] != 1.0F)
43      return 4;
44   if (attr[2] != 0.0F)
45      return 3;
46   if (attr[1] != 0.0F)
47      return 2;
48   return 1;
49}
50
51
52/**
53 * Helper for initializing a vertex array.
54 */
55static void
56init_array(struct gl_context *ctx, struct gl_array_attributes *attrib,
57           unsigned size, const void *pointer)
58{
59   memset(attrib, 0, sizeof(*attrib));
60
61   attrib->Size = size;
62   attrib->Type = GL_FLOAT;
63   attrib->Format = GL_RGBA;
64   attrib->Stride = 0;
65   attrib->_ElementSize = size * sizeof(GLfloat);
66   attrib->Ptr = pointer;
67}
68
69
70/**
71 * Set up the vbo->currval arrays to point at the context's current
72 * vertex attributes (with strides = 0).
73 */
74static void
75init_legacy_currval(struct gl_context *ctx)
76{
77   struct vbo_context *vbo = vbo_context(ctx);
78   GLuint i;
79
80   /* Set up a constant (Stride == 0) array for each current
81    * attribute:
82    */
83   for (i = 0; i < VERT_ATTRIB_FF_MAX; i++) {
84      const unsigned attr = VERT_ATTRIB_FF(i);
85      struct gl_array_attributes *attrib = &vbo->current[attr];
86
87      init_array(ctx, attrib, check_size(ctx->Current.Attrib[attr]),
88                 ctx->Current.Attrib[attr]);
89   }
90}
91
92
93static void
94init_generic_currval(struct gl_context *ctx)
95{
96   struct vbo_context *vbo = vbo_context(ctx);
97   GLuint i;
98
99   for (i = 0; i < VERT_ATTRIB_GENERIC_MAX; i++) {
100      const unsigned attr = VBO_ATTRIB_GENERIC0 + i;
101      struct gl_array_attributes *attrib = &vbo->current[attr];
102
103      init_array(ctx, attrib, 1, ctx->Current.Attrib[attr]);
104   }
105}
106
107
108static void
109init_mat_currval(struct gl_context *ctx)
110{
111   struct vbo_context *vbo = vbo_context(ctx);
112   GLuint i;
113
114   /* Set up a constant (StrideB == 0) array for each current
115    * attribute:
116    */
117   for (i = 0; i < MAT_ATTRIB_MAX; i++) {
118      const unsigned attr = VBO_ATTRIB_MAT_FRONT_AMBIENT + i;
119      struct gl_array_attributes *attrib = &vbo->current[attr];
120      unsigned size;
121
122      /* Size is fixed for the material attributes, for others will
123       * be determined at runtime:
124       */
125      switch (i) {
126      case MAT_ATTRIB_FRONT_SHININESS:
127      case MAT_ATTRIB_BACK_SHININESS:
128         size = 1;
129         break;
130      case MAT_ATTRIB_FRONT_INDEXES:
131      case MAT_ATTRIB_BACK_INDEXES:
132         size = 3;
133         break;
134      default:
135         size = 4;
136         break;
137      }
138
139      init_array(ctx, attrib, size, ctx->Light.Material.Attrib[i]);
140   }
141}
142
143
144void
145_vbo_install_exec_vtxfmt(struct gl_context *ctx)
146{
147   struct vbo_context *vbo = vbo_context(ctx);
148
149   _mesa_install_exec_vtxfmt(ctx, &vbo->exec.vtxfmt);
150}
151
152
153void
154vbo_exec_invalidate_state(struct gl_context *ctx)
155{
156   struct vbo_context *vbo = vbo_context(ctx);
157   struct vbo_exec_context *exec = &vbo->exec;
158
159   if (ctx->NewState & _NEW_ARRAY) {
160      _ae_invalidate_state(ctx);
161   }
162   if (ctx->NewState & _NEW_EVAL)
163      exec->eval.recalculate_maps = GL_TRUE;
164}
165
166
167GLboolean
168_vbo_CreateContext(struct gl_context *ctx)
169{
170   struct vbo_context *vbo = CALLOC_STRUCT(vbo_context);
171
172   ctx->vbo_context = vbo;
173
174   /* Initialize the arrayelt helper
175    */
176   if (!ctx->aelt_context &&
177       !_ae_create_context(ctx)) {
178      return GL_FALSE;
179   }
180
181   vbo->binding.Offset = 0;
182   vbo->binding.Stride = 0;
183   vbo->binding.InstanceDivisor = 0;
184   _mesa_reference_buffer_object(ctx, &vbo->binding.BufferObj,
185                                 ctx->Shared->NullBufferObj);
186   init_legacy_currval(ctx);
187   init_generic_currval(ctx);
188   init_mat_currval(ctx);
189
190   /* make sure all VBO_ATTRIB_ values can fit in an unsigned byte */
191   STATIC_ASSERT(VBO_ATTRIB_MAX <= 255);
192
193   /* Hook our functions into exec and compile dispatch tables.  These
194    * will pretty much be permanently installed, which means that the
195    * vtxfmt mechanism can be removed now.
196    */
197   vbo_exec_init(ctx);
198   if (ctx->API == API_OPENGL_COMPAT)
199      vbo_save_init(ctx);
200
201   vbo->VAO = _mesa_new_vao(ctx, ~((GLuint)0));
202   /* The exec VAO assumes to have all arributes bound to binding 0 */
203   for (unsigned i = 0; i < VERT_ATTRIB_MAX; ++i)
204      _mesa_vertex_attrib_binding(ctx, vbo->VAO, i, 0);
205
206   _math_init_eval();
207
208   return GL_TRUE;
209}
210
211
212void
213_vbo_DestroyContext(struct gl_context *ctx)
214{
215   struct vbo_context *vbo = vbo_context(ctx);
216
217   if (ctx->aelt_context) {
218      _ae_destroy_context(ctx);
219      ctx->aelt_context = NULL;
220   }
221
222   if (vbo) {
223
224      _mesa_reference_buffer_object(ctx, &vbo->binding.BufferObj, NULL);
225
226      vbo_exec_destroy(ctx);
227      if (ctx->API == API_OPENGL_COMPAT)
228         vbo_save_destroy(ctx);
229      _mesa_reference_vao(ctx, &vbo->VAO, NULL);
230      free(vbo);
231      ctx->vbo_context = NULL;
232   }
233}
234
235
236const struct gl_array_attributes *
237_vbo_current_attrib(const struct gl_context *ctx, gl_vert_attrib attr)
238{
239   const struct vbo_context *vbo = vbo_context_const(ctx);
240   const gl_vertex_processing_mode vmp = ctx->VertexProgram._VPMode;
241   return &vbo->current[_vbo_attribute_alias_map[vmp][attr]];
242}
243
244
245const struct gl_vertex_buffer_binding *
246_vbo_current_binding(const struct gl_context *ctx)
247{
248   const struct vbo_context *vbo = vbo_context_const(ctx);
249   return &vbo->binding;
250}
251