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
  37
  38 #define NR_LEGACY_ATTRIBS 16
  39 #define NR_GENERIC_ATTRIBS 16
  40 #define NR_MAT_ATTRIBS 12
  41
  42
  43 static GLuint check_size( const GLfloat *attr )
  44 {
  45    if (attr[3] != 1.0) return 4;
  46    if (attr[2] != 0.0) return 3;
  47    if (attr[1] != 0.0) return 2;
  48    return 1;
  49 }
  50
  51
  52 static void init_legacy_currval(struct gl_context *ctx)
  53 {
  54    struct vbo_context *vbo = vbo_context(ctx);
  55    struct gl_client_array *arrays = vbo->legacy_currval;
  56    GLuint i;
  57
  58    memset(arrays, 0, sizeof(*arrays) * NR_LEGACY_ATTRIBS);
  59
  60    /* Set up a constant (StrideB == 0) array for each current
  61     * attribute:
  62     */
  63    for (i = 0; i < NR_LEGACY_ATTRIBS; i++) {
  64       struct gl_client_array *cl = &arrays[i];
  65
  66       /* Size will have to be determined at runtime:
  67        */
  68       cl->Size = check_size(ctx->Current.Attrib[i]);
  69       cl->Stride = 0;
  70       cl->StrideB = 0;
  71       cl->Enabled = 1;
  72       cl->Type = GL_FLOAT;
  73       cl->Format = GL_RGBA;
  74       cl->Ptr = (const void *)ctx->Current.Attrib[i];
  75       cl->_ElementSize = cl->Size * sizeof(GLfloat);
  76       _mesa_reference_buffer_object(ctx, &cl->BufferObj,
  77                                     ctx->Shared->NullBufferObj);
  78    }
  79 }
  80
  81
  82 static void init_generic_currval(struct gl_context *ctx)
  83 {
  84    struct vbo_context *vbo = vbo_context(ctx);
  85    struct gl_client_array *arrays = vbo->generic_currval;
  86    GLuint i;
  87
  88    memset(arrays, 0, sizeof(*arrays) * NR_GENERIC_ATTRIBS);
  89
  90    for (i = 0; i < NR_GENERIC_ATTRIBS; i++) {
  91       struct gl_client_array *cl = &arrays[i];
  92
  93       /* This will have to be determined at runtime:
  94        */
  95       cl->Size = 1;
  96       cl->Type = GL_FLOAT;
  97       cl->Format = GL_RGBA;
  98       cl->Ptr = (const void *)ctx->Current.Attrib[VERT_ATTRIB_GENERIC0 + i];
  99       cl->Stride = 0;
 100       cl->StrideB = 0;
 101       cl->Enabled = 1;
 102       cl->_ElementSize = cl->Size * sizeof(GLfloat);
 103       _mesa_reference_buffer_object(ctx, &cl->BufferObj,
 104                                     ctx->Shared->NullBufferObj);
 105    }
 106 }
 107
 108
 109 static void init_mat_currval(struct gl_context *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->Format = GL_RGBA;
 145       cl->Stride = 0;
 146       cl->StrideB = 0;
 147       cl->Enabled = 1;
 148       cl->_ElementSize = cl->Size * sizeof(GLfloat);
 149       _mesa_reference_buffer_object(ctx, &cl->BufferObj,
 150                                     ctx->Shared->NullBufferObj);
 151    }
 152 }
 153
 154
 155 GLboolean _vbo_CreateContext( struct gl_context *ctx )
 156 {
 157    struct vbo_context *vbo = CALLOC_STRUCT(vbo_context);
 158
 159    ctx->swtnl_im = (void *)vbo;
 160
 161    /* Initialize the arrayelt helper
 162     */
 163    if (!ctx->aelt_context &&
 164        !_ae_create_context( ctx )) {
 165       return GL_FALSE;
 166    }
 167
 168    /* TODO: remove these pointers.
 169     */
 170    vbo->legacy_currval = &vbo->currval[VBO_ATTRIB_POS];
 171    vbo->generic_currval = &vbo->currval[VBO_ATTRIB_GENERIC0];
 172    vbo->mat_currval = &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT];
 173
 174    init_legacy_currval( ctx );
 175    init_generic_currval( ctx );
 176    init_mat_currval( ctx );
 177
 178    /* Build mappings from VERT_ATTRIB -> VBO_ATTRIB depending on type
 179     * of vertex program active.
 180     */
 181    {
 182       GLuint i;
 183
 184       /* When no vertex program, pull in the material attributes in
 185        * the 16..32 generic range.
 186        */
 187       for (i = 0; i < 16; i++)
 188          vbo->map_vp_none[i] = i;
 189       for (i = 0; i < 12; i++)
 190          vbo->map_vp_none[16+i] = VBO_ATTRIB_MAT_FRONT_AMBIENT + i;
 191       for (i = 0; i < 4; i++)
 192          vbo->map_vp_none[28+i] = i;
 193
 194       for (i = 0; i < Elements(vbo->map_vp_arb); i++)
 195          vbo->map_vp_arb[i] = i;
 196    }
 197
 198
 199    /* Hook our functions into exec and compile dispatch tables.  These
 200     * will pretty much be permanently installed, which means that the
 201     * vtxfmt mechanism can be removed now.
 202     */
 203    vbo_exec_init( ctx );
 204    if (ctx->API == API_OPENGL)
 205       vbo_save_init( ctx );
 206
 207    _math_init_eval();
 208
 209    return GL_TRUE;
 210 }
 211
 212
 213 void _vbo_InvalidateState( struct gl_context *ctx, GLuint new_state )
 214 {
 215    vbo_exec_invalidate_state(ctx, new_state);
 216 }
 217
 218
 219 void _vbo_DestroyContext( struct gl_context *ctx )
 220 {
 221    struct vbo_context *vbo = vbo_context(ctx);
 222
 223    if (ctx->aelt_context) {
 224       _ae_destroy_context( ctx );
 225       ctx->aelt_context = NULL;
 226    }
 227
 228    if (vbo) {
 229       GLuint i;
 230
 231       for (i = 0; i < VBO_ATTRIB_MAX; i++) {
 232          _mesa_reference_buffer_object(ctx, &vbo->currval[i].BufferObj, NULL);
 233       }
 234
 235       vbo_exec_destroy(ctx);
 236       if (ctx->API == API_OPENGL)
 237          vbo_save_destroy(ctx);
 238       FREE(vbo);
 239       ctx->swtnl_im = NULL;
 240    }
 241 }
 242
 243
 244 void vbo_set_draw_func(struct gl_context *ctx, vbo_draw_func func)
 245 {
 246    struct vbo_context *vbo = vbo_context(ctx);
 247    vbo->draw_prims = func;
 248 }
 249