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    ASSERT(NR_MAT_ATTRIBS == MAT_ATTRIB_MAX);
 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       cl->Ptr = (const void *)ctx->Light.Material.Attrib[i];
 143       cl->Type = GL_FLOAT;
 144       cl->Stride = 0;
 145       cl->StrideB = 0;
 146       cl->Enabled = 1;
 147       cl->BufferObj = ctx->Array.NullBufferObj;
 148    }
 149 }
 150
 151 #if 0
 152
 153 static void vbo_exec_current_init( struct vbo_exec_context *exec )
 154 {
 155    GLcontext *ctx = exec->ctx;
 156    GLint i;
 157
 158    /* setup the pointers for the typical 16 vertex attributes */
 159    for (i = 0; i < VBO_ATTRIB_FIRST_MATERIAL; i++)
 160       exec->vtx.current[i] = ctx->Current.Attrib[i];
 161
 162    /* setup pointers for the 12 material attributes */
 163    for (i = 0; i < MAT_ATTRIB_MAX; i++)
 164       exec->vtx.current[VBO_ATTRIB_FIRST_MATERIAL + i] =
 165          ctx->Light.Material.Attrib[i];
 166 }
 167 #endif
 168
 169 GLboolean _vbo_CreateContext( GLcontext *ctx )
 170 {
 171    struct vbo_context *vbo = CALLOC_STRUCT(vbo_context);
 172
 173    ctx->swtnl_im = (void *)vbo;
 174
 175    /* Initialize the arrayelt helper
 176     */
 177    if (!ctx->aelt_context &&
 178        !_ae_create_context( ctx )) {
 179       return GL_FALSE;
 180    }
 181
 182    /* TODO: remove these pointers.
 183     */
 184    vbo->legacy_currval = &vbo->currval[VBO_ATTRIB_POS];
 185    vbo->generic_currval = &vbo->currval[VBO_ATTRIB_GENERIC0];
 186    vbo->mat_currval = &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT];
 187
 188    init_legacy_currval( ctx );
 189    init_generic_currval( ctx );
 190    init_mat_currval( ctx );
 191
 192    /* Build mappings from VERT_ATTRIB -> VBO_ATTRIB depending on type
 193     * of vertex program active.
 194     */
 195    {
 196       GLuint i;
 197
 198       /* When no vertex program, pull in the material attributes in
 199        * the 16..32 generic range.
 200        */
 201       for (i = 0; i < 16; i++)
 202          vbo->map_vp_none[i] = i;
 203       for (i = 0; i < 12; i++)
 204          vbo->map_vp_none[16+i] = VBO_ATTRIB_MAT_FRONT_AMBIENT + i;
 205       for (i = 0; i < 4; i++)
 206          vbo->map_vp_none[28+i] = i;
 207
 208       for (i = 0; i < VERT_ATTRIB_MAX; i++)
 209          vbo->map_vp_arb[i] = i;
 210    }
 211
 212
 213    /* By default:
 214     */
 215    vbo->draw_prims = _tnl_draw_prims;
 216
 217    /* Hook our functions into exec and compile dispatch tables.  These
 218     * will pretty much be permanently installed, which means that the
 219     * vtxfmt mechanism can be removed now.
 220     */
 221    vbo_exec_init( ctx );
 222    vbo_save_init( ctx );
 223
 224
 225    return GL_TRUE;
 226 }
 227
 228 void _vbo_InvalidateState( GLcontext *ctx, GLuint new_state )
 229 {
 230    _ae_invalidate_state(ctx, new_state);
 231    vbo_exec_invalidate_state(ctx, new_state);
 232 }
 233
 234
 235 void _vbo_DestroyContext( GLcontext *ctx )
 236 {
 237    if (ctx->aelt_context) {
 238       _ae_destroy_context( ctx );
 239       ctx->aelt_context = NULL;
 240    }
 241
 242    vbo_exec_destroy(ctx);
 243    FREE(vbo_context(ctx));
 244    ctx->swtnl_im = NULL;
 245 }