src/mesa/vbo/vbo_context.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2005  Brian Paul   All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Keith Whitwell <keithw@vmware.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->currval[VBO_ATTRIB_POS];
  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->currval[VBO_ATTRIB_GENERIC0];
  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 =
 108       &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT];
 109    GLuint i;
 110
 111    ASSERT(NR_MAT_ATTRIBS == MAT_ATTRIB_MAX);
 112
 113    memset(arrays, 0, sizeof(*arrays) * NR_MAT_ATTRIBS);
 114
 115    /* Set up a constant (StrideB == 0) array for each current
 116     * attribute:
 117     */
 118    for (i = 0; i < NR_MAT_ATTRIBS; i++) {
 119       struct gl_client_array *cl = &arrays[i];
 120
 121       /* Size is fixed for the material attributes, for others will
 122        * be determined at runtime:
 123        */
 124       switch (i - VERT_ATTRIB_GENERIC0) {
 125       case MAT_ATTRIB_FRONT_SHININESS:
 126       case MAT_ATTRIB_BACK_SHININESS:
 127          cl->Size = 1;
 128          break;
 129       case MAT_ATTRIB_FRONT_INDEXES:
 130       case MAT_ATTRIB_BACK_INDEXES:
 131          cl->Size = 3;
 132          break;
 133       default:
 134          cl->Size = 4;
 135          break;
 136       }
 137
 138       cl->Ptr = (const void *)ctx->Light.Material.Attrib[i];
 139       cl->Type = GL_FLOAT;
 140       cl->Format = GL_RGBA;
 141       cl->Stride = 0;
 142       cl->StrideB = 0;
 143       cl->Enabled = 1;
 144       cl->_ElementSize = cl->Size * sizeof(GLfloat);
 145       _mesa_reference_buffer_object(ctx, &cl->BufferObj,
 146                                     ctx->Shared->NullBufferObj);
 147    }
 148 }
 149
 150
 151 GLboolean _vbo_CreateContext( struct gl_context *ctx )
 152 {
 153    struct vbo_context *vbo = CALLOC_STRUCT(vbo_context);
 154
 155    ctx->vbo_context = vbo;
 156
 157    /* Initialize the arrayelt helper
 158     */
 159    if (!ctx->aelt_context &&
 160        !_ae_create_context( ctx )) {
 161       return GL_FALSE;
 162    }
 163
 164    init_legacy_currval( ctx );
 165    init_generic_currval( ctx );
 166    init_mat_currval( ctx );
 167
 168    /* Build mappings from VERT_ATTRIB -> VBO_ATTRIB depending on type
 169     * of vertex program active.
 170     */
 171    {
 172       GLuint i;
 173
 174       /* identity mapping */
 175       for (i = 0; i < Elements(vbo->map_vp_none); i++)
 176          vbo->map_vp_none[i] = i;
 177       /* map material attribs to generic slots */
 178       for (i = 0; i < NR_MAT_ATTRIBS; i++)
 179          vbo->map_vp_none[VERT_ATTRIB_GENERIC(i)]
 180             = VBO_ATTRIB_MAT_FRONT_AMBIENT + i;
 181
 182       for (i = 0; i < Elements(vbo->map_vp_arb); i++)
 183          vbo->map_vp_arb[i] = i;
 184    }
 185
 186
 187    /* Hook our functions into exec and compile dispatch tables.  These
 188     * will pretty much be permanently installed, which means that the
 189     * vtxfmt mechanism can be removed now.
 190     */
 191    vbo_exec_init( ctx );
 192    if (ctx->API == API_OPENGL_COMPAT)
 193       vbo_save_init( ctx );
 194
 195    _math_init_eval();
 196
 197    return GL_TRUE;
 198 }
 199
 200
 201 void _vbo_InvalidateState( struct gl_context *ctx, GLuint new_state )
 202 {
 203    vbo_exec_invalidate_state(ctx, new_state);
 204 }
 205
 206
 207 void _vbo_DestroyContext( struct gl_context *ctx )
 208 {
 209    struct vbo_context *vbo = vbo_context(ctx);
 210
 211    if (ctx->aelt_context) {
 212       _ae_destroy_context( ctx );
 213       ctx->aelt_context = NULL;
 214    }
 215
 216    if (vbo) {
 217       GLuint i;
 218
 219       for (i = 0; i < VBO_ATTRIB_MAX; i++) {
 220          _mesa_reference_buffer_object(ctx, &vbo->currval[i].BufferObj, NULL);
 221       }
 222
 223       vbo_exec_destroy(ctx);
 224       if (ctx->API == API_OPENGL_COMPAT)
 225          vbo_save_destroy(ctx);
 226       free(vbo);
 227       ctx->vbo_context = NULL;
 228    }
 229 }
 230
 231
 232 void vbo_set_draw_func(struct gl_context *ctx, vbo_draw_func func)
 233 {
 234    struct vbo_context *vbo = vbo_context(ctx);
 235    vbo->draw_prims = func;
 236 }
 237