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