src/mesa/vbo/vbo_context.c

   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 "vbo.h"
  32 #include "vbo_context.h"
  33
  34 /* Reach out and grab this to use as the default:
  35  */
  36 extern 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
  50 static 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
  58 static 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
  85 static 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
 109 static 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
 155 static 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
 171 GLboolean _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
 230 void _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
 237 void _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 }