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 #if 0
  35 /* Reach out and grab this to use as the default:
  36  */
  37 extern void _tnl_draw_prims( GLcontext *ctx,
  38                              const struct gl_client_array *arrays[],
  39                              const struct _mesa_prim *prims,
  40                              GLuint nr_prims,
  41                              const struct _mesa_index_buffer *ib,
  42                              GLuint min_index,
  43                              GLuint max_index );
  44 #endif
  45
  46
  47
  48 #define NR_LEGACY_ATTRIBS 16
  49 #define NR_GENERIC_ATTRIBS 16
  50 #define NR_MAT_ATTRIBS 12
  51
  52 static GLuint check_size( const GLfloat *attr )
  53 {
  54    if (attr[3] != 1.0) return 4;
  55    if (attr[2] != 0.0) return 3;
  56    if (attr[1] != 0.0) return 2;
  57    return 1;
  58 }
  59
  60 static void init_legacy_currval(GLcontext *ctx)
  61 {
  62    struct vbo_context *vbo = vbo_context(ctx);
  63    struct gl_client_array *arrays = vbo->legacy_currval;
  64    GLuint i;
  65
  66    memset(arrays, 0, sizeof(*arrays) * NR_LEGACY_ATTRIBS);
  67
  68    /* Set up a constant (StrideB == 0) array for each current
  69     * attribute:
  70     */
  71    for (i = 0; i < NR_LEGACY_ATTRIBS; i++) {
  72       struct gl_client_array *cl = &arrays[i];
  73
  74       /* Size will have to be determined at runtime:
  75        */
  76       cl->Size = check_size(ctx->Current.Attrib[i]);
  77       cl->Stride = 0;
  78       cl->StrideB = 0;
  79       cl->Enabled = 1;
  80       cl->Type = GL_FLOAT;
  81       cl->Ptr = (const void *)ctx->Current.Attrib[i];
  82       cl->BufferObj = ctx->Array.NullBufferObj;
  83    }
  84 }
  85
  86
  87 static void init_generic_currval(GLcontext *ctx)
  88 {
  89    struct vbo_context *vbo = vbo_context(ctx);
  90    struct gl_client_array *arrays = vbo->generic_currval;
  91    GLuint i;
  92
  93    memset(arrays, 0, sizeof(*arrays) * NR_GENERIC_ATTRIBS);
  94
  95    for (i = 0; i < NR_GENERIC_ATTRIBS; i++) {
  96       struct gl_client_array *cl = &arrays[i];
  97
  98       /* This will have to be determined at runtime:
  99        */
 100       cl->Size = 1;
 101       cl->Type = GL_FLOAT;
 102       cl->Ptr = (const void *)ctx->Current.Attrib[VERT_ATTRIB_GENERIC0 + i];
 103       cl->Stride = 0;
 104       cl->StrideB = 0;
 105       cl->Enabled = 1;
 106       cl->BufferObj = ctx->Array.NullBufferObj;
 107    }
 108 }
 109
 110
 111 static void init_mat_currval(GLcontext *ctx)
 112 {
 113    struct vbo_context *vbo = vbo_context(ctx);
 114    struct gl_client_array *arrays = vbo->mat_currval;
 115    GLuint i;
 116
 117    memset(arrays, 0, sizeof(*arrays) * NR_MAT_ATTRIBS);
 118
 119    /* Set up a constant (StrideB == 0) array for each current
 120     * attribute:
 121     */
 122    for (i = 0; i < NR_MAT_ATTRIBS; i++) {
 123       struct gl_client_array *cl = &arrays[i];
 124
 125       /* Size is fixed for the material attributes, for others will
 126        * be determined at runtime:
 127        */
 128       switch (i - VERT_ATTRIB_GENERIC0) {
 129       case MAT_ATTRIB_FRONT_SHININESS:
 130       case MAT_ATTRIB_BACK_SHININESS:
 131          cl->Size = 1;
 132          break;
 133       case MAT_ATTRIB_FRONT_INDEXES:
 134       case MAT_ATTRIB_BACK_INDEXES:
 135          cl->Size = 3;
 136          break;
 137       default:
 138          cl->Size = 4;
 139          break;
 140       }
 141
 142       if (i < MAT_ATTRIB_MAX)
 143          cl->Ptr = (const void *)ctx->Light.Material.Attrib[i];
 144       else
 145          cl->Ptr = (const void *)ctx->Current.Attrib[VERT_ATTRIB_GENERIC0 + i];
 146
 147       cl->Type = GL_FLOAT;
 148       cl->Stride = 0;
 149       cl->StrideB = 0;
 150       cl->Enabled = 1;
 151       cl->BufferObj = ctx->Array.NullBufferObj;
 152    }
 153 }
 154
 155 #if 0
 156
 157 static void vbo_exec_current_init( struct vbo_exec_context *exec )
 158 {
 159    GLcontext *ctx = exec->ctx;
 160    GLint i;
 161
 162    /* setup the pointers for the typical 16 vertex attributes */
 163    for (i = 0; i < VBO_ATTRIB_FIRST_MATERIAL; i++)
 164       exec->vtx.current[i] = ctx->Current.Attrib[i];
 165
 166    /* setup pointers for the 12 material attributes */
 167    for (i = 0; i < MAT_ATTRIB_MAX; i++)
 168       exec->vtx.current[VBO_ATTRIB_FIRST_MATERIAL + i] =
 169          ctx->Light.Material.Attrib[i];
 170 }
 171 #endif
 172
 173 GLboolean _vbo_CreateContext( GLcontext *ctx )
 174 {
 175    struct vbo_context *vbo = CALLOC_STRUCT(vbo_context);
 176
 177    ctx->swtnl_im = (void *)vbo;
 178
 179    /* Initialize the arrayelt helper
 180     */
 181    if (!ctx->aelt_context &&
 182        !_ae_create_context( ctx )) {
 183       return GL_FALSE;
 184    }
 185
 186    /* TODO: remove these pointers.
 187     */
 188    vbo->legacy_currval = &vbo->currval[VBO_ATTRIB_POS];
 189    vbo->generic_currval = &vbo->currval[VBO_ATTRIB_GENERIC0];
 190    vbo->mat_currval = &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT];
 191
 192    init_legacy_currval( ctx );
 193    init_generic_currval( ctx );
 194    init_mat_currval( ctx );
 195
 196    /* Build mappings from VERT_ATTRIB -> VBO_ATTRIB depending on type
 197     * of vertex program active.
 198     */
 199    {
 200       GLuint i;
 201
 202       /* When no vertex program, pull in the material attributes in
 203        * the 16..32 generic range.
 204        */
 205       for (i = 0; i < 16; i++)
 206          vbo->map_vp_none[i] = i;
 207       for (i = 0; i < 12; i++)
 208          vbo->map_vp_none[16+i] = VBO_ATTRIB_MAT_FRONT_AMBIENT + i;
 209       for (i = 0; i < 4; i++)
 210          vbo->map_vp_none[28+i] = i;
 211
 212       for (i = 0; i < VERT_ATTRIB_MAX; i++)
 213          vbo->map_vp_arb[i] = i;
 214    }
 215
 216
 217    /* By default:
 218     */
 219 #if 0 /* dead - see vbo_set_draw_func() */
 220    vbo->draw_prims = _tnl_draw_prims;
 221 #endif
 222
 223    /* Hook our functions into exec and compile dispatch tables.  These
 224     * will pretty much be permanently installed, which means that the
 225     * vtxfmt mechanism can be removed now.
 226     */
 227    vbo_exec_init( ctx );
 228    vbo_save_init( ctx );
 229
 230
 231    return GL_TRUE;
 232 }
 233
 234 void _vbo_InvalidateState( GLcontext *ctx, GLuint new_state )
 235 {
 236    _ae_invalidate_state(ctx, new_state);
 237    vbo_exec_invalidate_state(ctx, new_state);
 238 }
 239
 240
 241 void _vbo_DestroyContext( GLcontext *ctx )
 242 {
 243    if (ctx->aelt_context) {
 244       _ae_destroy_context( ctx );
 245       ctx->aelt_context = NULL;
 246    }
 247
 248    vbo_exec_destroy(ctx);
 249    FREE(vbo_context(ctx));
 250    ctx->swtnl_im = NULL;
 251 }
 252
 253
 254 void vbo_set_draw_func(GLcontext *ctx, vbo_draw_func func)
 255 {
 256    struct vbo_context *vbo = vbo_context(ctx);
 257    vbo->draw_prims = func;
 258 }
 259