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(GLcontext *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       _mesa_reference_buffer_object(ctx, &cl->BufferObj,
  76                                     ctx->Shared->NullBufferObj);
  77    }
  78 }
  79
  80
  81 static void init_generic_currval(GLcontext *ctx)
  82 {
  83    struct vbo_context *vbo = vbo_context(ctx);
  84    struct gl_client_array *arrays = vbo->generic_currval;
  85    GLuint i;
  86
  87    memset(arrays, 0, sizeof(*arrays) * NR_GENERIC_ATTRIBS);
  88
  89    for (i = 0; i < NR_GENERIC_ATTRIBS; i++) {
  90       struct gl_client_array *cl = &arrays[i];
  91
  92       /* This will have to be determined at runtime:
  93        */
  94       cl->Size = 1;
  95       cl->Type = GL_FLOAT;
  96       cl->Format = GL_RGBA;
  97       cl->Ptr = (const void *)ctx->Current.Attrib[VERT_ATTRIB_GENERIC0 + i];
  98       cl->Stride = 0;
  99       cl->StrideB = 0;
 100       cl->Enabled = 1;
 101       _mesa_reference_buffer_object(ctx, &cl->BufferObj,
 102                                     ctx->Shared->NullBufferObj);
 103    }
 104 }
 105
 106
 107 static void init_mat_currval(GLcontext *ctx)
 108 {
 109    struct vbo_context *vbo = vbo_context(ctx);
 110    struct gl_client_array *arrays = vbo->mat_currval;
 111    GLuint i;
 112
 113    ASSERT(NR_MAT_ATTRIBS == MAT_ATTRIB_MAX);
 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       cl->Ptr = (const void *)ctx->Light.Material.Attrib[i];
 141       cl->Type = GL_FLOAT;
 142       cl->Format = GL_RGBA;
 143       cl->Stride = 0;
 144       cl->StrideB = 0;
 145       cl->Enabled = 1;
 146       _mesa_reference_buffer_object(ctx, &cl->BufferObj,
 147                                     ctx->Shared->NullBufferObj);
 148    }
 149 }
 150
 151
 152 GLboolean _vbo_CreateContext( GLcontext *ctx )
 153 {
 154    struct vbo_context *vbo = CALLOC_STRUCT(vbo_context);
 155
 156    ctx->swtnl_im = (void *)vbo;
 157
 158    /* Initialize the arrayelt helper
 159     */
 160    if (!ctx->aelt_context &&
 161        !_ae_create_context( ctx )) {
 162       return GL_FALSE;
 163    }
 164
 165    /* TODO: remove these pointers.
 166     */
 167    vbo->legacy_currval = &vbo->currval[VBO_ATTRIB_POS];
 168    vbo->generic_currval = &vbo->currval[VBO_ATTRIB_GENERIC0];
 169    vbo->mat_currval = &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT];
 170
 171    init_legacy_currval( ctx );
 172    init_generic_currval( ctx );
 173    init_mat_currval( ctx );
 174
 175    /* Build mappings from VERT_ATTRIB -> VBO_ATTRIB depending on type
 176     * of vertex program active.
 177     */
 178    {
 179       GLuint i;
 180
 181       /* When no vertex program, pull in the material attributes in
 182        * the 16..32 generic range.
 183        */
 184       for (i = 0; i < 16; i++)
 185          vbo->map_vp_none[i] = i;
 186       for (i = 0; i < 12; i++)
 187          vbo->map_vp_none[16+i] = VBO_ATTRIB_MAT_FRONT_AMBIENT + i;
 188       for (i = 0; i < 4; i++)
 189          vbo->map_vp_none[28+i] = i;
 190
 191       for (i = 0; i < Elements(vbo->map_vp_arb); i++)
 192          vbo->map_vp_arb[i] = i;
 193    }
 194
 195
 196    /* Hook our functions into exec and compile dispatch tables.  These
 197     * will pretty much be permanently installed, which means that the
 198     * vtxfmt mechanism can be removed now.
 199     */
 200    vbo_exec_init( ctx );
 201 #if FEATURE_dlist
 202    vbo_save_init( ctx );
 203 #endif
 204
 205    _math_init_eval();
 206
 207    return GL_TRUE;
 208 }
 209
 210
 211 void _vbo_InvalidateState( GLcontext *ctx, GLuint new_state )
 212 {
 213    _ae_invalidate_state(ctx, new_state);
 214    vbo_exec_invalidate_state(ctx, new_state);
 215 }
 216
 217
 218 void _vbo_DestroyContext( GLcontext *ctx )
 219 {
 220    struct vbo_context *vbo = vbo_context(ctx);
 221
 222    if (ctx->aelt_context) {
 223       _ae_destroy_context( ctx );
 224       ctx->aelt_context = NULL;
 225    }
 226
 227    if (vbo) {
 228       GLuint i;
 229
 230       for (i = 0; i < VBO_ATTRIB_MAX; i++) {
 231          _mesa_reference_buffer_object(ctx, &vbo->currval[i].BufferObj, NULL);
 232       }
 233
 234       vbo_exec_destroy(ctx);
 235 #if FEATURE_dlist
 236       vbo_save_destroy(ctx);
 237 #endif
 238       FREE(vbo);
 239       ctx->swtnl_im = NULL;
 240    }
 241 }
 242
 243
 244 void vbo_set_draw_func(GLcontext *ctx, vbo_draw_func func)
 245 {
 246    struct vbo_context *vbo = vbo_context(ctx);
 247    vbo->draw_prims = func;
 248 }
 249