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 "main/bufferobj.h"
  32 #include "math/m_eval.h"
  33 #include "vbo.h"
  34 #include "vbo_context.h"
  35
  36 #if 0
  37 /* Reach out and grab this to use as the default:
  38  */
  39 extern void _tnl_draw_prims( GLcontext *ctx,
  40                              const struct gl_client_array *arrays[],
  41                              const struct _mesa_prim *prims,
  42                              GLuint nr_prims,
  43                              const struct _mesa_index_buffer *ib,
  44                              GLuint min_index,
  45                              GLuint max_index );
  46 #endif
  47
  48
  49
  50 #define NR_LEGACY_ATTRIBS 16
  51 #define NR_GENERIC_ATTRIBS 16
  52 #define NR_MAT_ATTRIBS 12
  53
  54 static GLuint check_size( const GLfloat *attr )
  55 {
  56    if (attr[3] != 1.0) return 4;
  57    if (attr[2] != 0.0) return 3;
  58    if (attr[1] != 0.0) return 2;
  59    return 1;
  60 }
  61
  62 static void init_legacy_currval(GLcontext *ctx)
  63 {
  64    struct vbo_context *vbo = vbo_context(ctx);
  65    struct gl_client_array *arrays = vbo->legacy_currval;
  66    GLuint i;
  67
  68    memset(arrays, 0, sizeof(*arrays) * NR_LEGACY_ATTRIBS);
  69
  70    /* Set up a constant (StrideB == 0) array for each current
  71     * attribute:
  72     */
  73    for (i = 0; i < NR_LEGACY_ATTRIBS; i++) {
  74       struct gl_client_array *cl = &arrays[i];
  75
  76       /* Size will have to be determined at runtime:
  77        */
  78       cl->Size = check_size(ctx->Current.Attrib[i]);
  79       cl->Stride = 0;
  80       cl->StrideB = 0;
  81       cl->Enabled = 1;
  82       cl->Type = GL_FLOAT;
  83       cl->Format = GL_RGBA;
  84       cl->Ptr = (const void *)ctx->Current.Attrib[i];
  85       _mesa_reference_buffer_object(ctx, &cl->BufferObj,
  86                                     ctx->Shared->NullBufferObj);
  87    }
  88 }
  89
  90
  91 static void init_generic_currval(GLcontext *ctx)
  92 {
  93    struct vbo_context *vbo = vbo_context(ctx);
  94    struct gl_client_array *arrays = vbo->generic_currval;
  95    GLuint i;
  96
  97    memset(arrays, 0, sizeof(*arrays) * NR_GENERIC_ATTRIBS);
  98
  99    for (i = 0; i < NR_GENERIC_ATTRIBS; i++) {
 100       struct gl_client_array *cl = &arrays[i];
 101
 102       /* This will have to be determined at runtime:
 103        */
 104       cl->Size = 1;
 105       cl->Type = GL_FLOAT;
 106       cl->Format = GL_RGBA;
 107       cl->Ptr = (const void *)ctx->Current.Attrib[VERT_ATTRIB_GENERIC0 + i];
 108       cl->Stride = 0;
 109       cl->StrideB = 0;
 110       cl->Enabled = 1;
 111       _mesa_reference_buffer_object(ctx, &cl->BufferObj,
 112                                     ctx->Shared->NullBufferObj);
 113    }
 114 }
 115
 116
 117 static void init_mat_currval(GLcontext *ctx)
 118 {
 119    struct vbo_context *vbo = vbo_context(ctx);
 120    struct gl_client_array *arrays = vbo->mat_currval;
 121    GLuint i;
 122
 123    ASSERT(NR_MAT_ATTRIBS == MAT_ATTRIB_MAX);
 124
 125    memset(arrays, 0, sizeof(*arrays) * NR_MAT_ATTRIBS);
 126
 127    /* Set up a constant (StrideB == 0) array for each current
 128     * attribute:
 129     */
 130    for (i = 0; i < NR_MAT_ATTRIBS; i++) {
 131       struct gl_client_array *cl = &arrays[i];
 132
 133       /* Size is fixed for the material attributes, for others will
 134        * be determined at runtime:
 135        */
 136       switch (i - VERT_ATTRIB_GENERIC0) {
 137       case MAT_ATTRIB_FRONT_SHININESS:
 138       case MAT_ATTRIB_BACK_SHININESS:
 139          cl->Size = 1;
 140          break;
 141       case MAT_ATTRIB_FRONT_INDEXES:
 142       case MAT_ATTRIB_BACK_INDEXES:
 143          cl->Size = 3;
 144          break;
 145       default:
 146          cl->Size = 4;
 147          break;
 148       }
 149
 150       cl->Ptr = (const void *)ctx->Light.Material.Attrib[i];
 151       cl->Type = GL_FLOAT;
 152       cl->Format = GL_RGBA;
 153       cl->Stride = 0;
 154       cl->StrideB = 0;
 155       cl->Enabled = 1;
 156       _mesa_reference_buffer_object(ctx, &cl->BufferObj,
 157                                     ctx->Shared->NullBufferObj);
 158    }
 159 }
 160
 161 #if 0
 162
 163 static void vbo_exec_current_init( struct vbo_exec_context *exec )
 164 {
 165    GLcontext *ctx = exec->ctx;
 166    GLint i;
 167
 168    /* setup the pointers for the typical 16 vertex attributes */
 169    for (i = 0; i < VBO_ATTRIB_FIRST_MATERIAL; i++)
 170       exec->vtx.current[i] = ctx->Current.Attrib[i];
 171
 172    /* setup pointers for the 12 material attributes */
 173    for (i = 0; i < MAT_ATTRIB_MAX; i++)
 174       exec->vtx.current[VBO_ATTRIB_FIRST_MATERIAL + i] =
 175          ctx->Light.Material.Attrib[i];
 176 }
 177 #endif
 178
 179 GLboolean _vbo_CreateContext( GLcontext *ctx )
 180 {
 181    struct vbo_context *vbo = CALLOC_STRUCT(vbo_context);
 182
 183    ctx->swtnl_im = (void *)vbo;
 184
 185    /* Initialize the arrayelt helper
 186     */
 187    if (!ctx->aelt_context &&
 188        !_ae_create_context( ctx )) {
 189       return GL_FALSE;
 190    }
 191
 192    /* TODO: remove these pointers.
 193     */
 194    vbo->legacy_currval = &vbo->currval[VBO_ATTRIB_POS];
 195    vbo->generic_currval = &vbo->currval[VBO_ATTRIB_GENERIC0];
 196    vbo->mat_currval = &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT];
 197
 198    init_legacy_currval( ctx );
 199    init_generic_currval( ctx );
 200    init_mat_currval( ctx );
 201
 202    /* Build mappings from VERT_ATTRIB -> VBO_ATTRIB depending on type
 203     * of vertex program active.
 204     */
 205    {
 206       GLuint i;
 207
 208       /* When no vertex program, pull in the material attributes in
 209        * the 16..32 generic range.
 210        */
 211       for (i = 0; i < 16; i++)
 212          vbo->map_vp_none[i] = i;
 213       for (i = 0; i < 12; i++)
 214          vbo->map_vp_none[16+i] = VBO_ATTRIB_MAT_FRONT_AMBIENT + i;
 215       for (i = 0; i < 4; i++)
 216          vbo->map_vp_none[28+i] = i;
 217
 218       for (i = 0; i < Elements(vbo->map_vp_arb); i++)
 219          vbo->map_vp_arb[i] = i;
 220    }
 221
 222
 223    /* By default:
 224     */
 225 #if 0 /* dead - see vbo_set_draw_func() */
 226    vbo->draw_prims = _tnl_draw_prims;
 227 #endif
 228
 229    /* Hook our functions into exec and compile dispatch tables.  These
 230     * will pretty much be permanently installed, which means that the
 231     * vtxfmt mechanism can be removed now.
 232     */
 233    vbo_exec_init( ctx );
 234 #if FEATURE_dlist
 235    vbo_save_init( ctx );
 236 #endif
 237
 238    _math_init_eval();
 239
 240    return GL_TRUE;
 241 }
 242
 243 void _vbo_InvalidateState( GLcontext *ctx, GLuint new_state )
 244 {
 245    _ae_invalidate_state(ctx, new_state);
 246    vbo_exec_invalidate_state(ctx, new_state);
 247 }
 248
 249
 250 void _vbo_DestroyContext( GLcontext *ctx )
 251 {
 252    if (ctx->aelt_context) {
 253       _ae_destroy_context( ctx );
 254       ctx->aelt_context = NULL;
 255    }
 256
 257    if (vbo_context(ctx)) {
 258       vbo_exec_destroy(ctx);
 259 #if FEATURE_dlist
 260       vbo_save_destroy(ctx);
 261 #endif
 262       FREE(vbo_context(ctx));
 263       ctx->swtnl_im = NULL;
 264    }
 265 }
 266
 267
 268 void vbo_set_draw_func(GLcontext *ctx, vbo_draw_func func)
 269 {
 270    struct vbo_context *vbo = vbo_context(ctx);
 271    vbo->draw_prims = func;
 272 }
 273