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
  37 static GLuint check_size( const GLfloat *attr )
  38 {
  39    if (attr[3] != 1.0F) return 4;
  40    if (attr[2] != 0.0F) return 3;
  41    if (attr[1] != 0.0F) return 2;
  42    return 1;
  43 }
  44
  45
  46 static void init_legacy_currval(struct gl_context *ctx)
  47 {
  48    struct vbo_context *vbo = vbo_context(ctx);
  49    struct gl_client_array *arrays = &vbo->currval[VBO_ATTRIB_POS];
  50    GLuint i;
  51
  52    memset(arrays, 0, sizeof(*arrays) * VERT_ATTRIB_FF_MAX);
  53
  54    /* Set up a constant (StrideB == 0) array for each current
  55     * attribute:
  56     */
  57    for (i = 0; i < VERT_ATTRIB_FF_MAX; i++) {
  58       struct gl_client_array *cl = &arrays[i];
  59
  60       /* Size will have to be determined at runtime:
  61        */
  62       cl->Size = check_size(ctx->Current.Attrib[i]);
  63       cl->Stride = 0;
  64       cl->StrideB = 0;
  65       cl->Enabled = 1;
  66       cl->Type = GL_FLOAT;
  67       cl->Format = GL_RGBA;
  68       cl->Ptr = (const void *)ctx->Current.Attrib[i];
  69       cl->_ElementSize = cl->Size * sizeof(GLfloat);
  70       _mesa_reference_buffer_object(ctx, &cl->BufferObj,
  71                                     ctx->Shared->NullBufferObj);
  72    }
  73 }
  74
  75
  76 static void init_generic_currval(struct gl_context *ctx)
  77 {
  78    struct vbo_context *vbo = vbo_context(ctx);
  79    struct gl_client_array *arrays = &vbo->currval[VBO_ATTRIB_GENERIC0];
  80    GLuint i;
  81
  82    memset(arrays, 0, sizeof(*arrays) * VERT_ATTRIB_GENERIC_MAX);
  83
  84    for (i = 0; i < VERT_ATTRIB_GENERIC_MAX; i++) {
  85       struct gl_client_array *cl = &arrays[i];
  86
  87       /* This will have to be determined at runtime:
  88        */
  89       cl->Size = 1;
  90       cl->Type = GL_FLOAT;
  91       cl->Format = GL_RGBA;
  92       cl->Ptr = (const void *)ctx->Current.Attrib[VERT_ATTRIB_GENERIC0 + i];
  93       cl->Stride = 0;
  94       cl->StrideB = 0;
  95       cl->Enabled = 1;
  96       cl->_ElementSize = cl->Size * sizeof(GLfloat);
  97       _mesa_reference_buffer_object(ctx, &cl->BufferObj,
  98                                     ctx->Shared->NullBufferObj);
  99    }
 100 }
 101
 102
 103 static void init_mat_currval(struct gl_context *ctx)
 104 {
 105    struct vbo_context *vbo = vbo_context(ctx);
 106    struct gl_client_array *arrays =
 107       &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT];
 108    GLuint i;
 109
 110    memset(arrays, 0, sizeof(*arrays) * MAT_ATTRIB_MAX);
 111
 112    /* Set up a constant (StrideB == 0) array for each current
 113     * attribute:
 114     */
 115    for (i = 0; i < MAT_ATTRIB_MAX; i++) {
 116       struct gl_client_array *cl = &arrays[i];
 117
 118       /* Size is fixed for the material attributes, for others will
 119        * be determined at runtime:
 120        */
 121       switch (i) {
 122       case MAT_ATTRIB_FRONT_SHININESS:
 123       case MAT_ATTRIB_BACK_SHININESS:
 124          cl->Size = 1;
 125          break;
 126       case MAT_ATTRIB_FRONT_INDEXES:
 127       case MAT_ATTRIB_BACK_INDEXES:
 128          cl->Size = 3;
 129          break;
 130       default:
 131          cl->Size = 4;
 132          break;
 133       }
 134
 135       cl->Ptr = (const void *)ctx->Light.Material.Attrib[i];
 136       cl->Type = GL_FLOAT;
 137       cl->Format = GL_RGBA;
 138       cl->Stride = 0;
 139       cl->StrideB = 0;
 140       cl->Enabled = 1;
 141       cl->_ElementSize = cl->Size * sizeof(GLfloat);
 142       _mesa_reference_buffer_object(ctx, &cl->BufferObj,
 143                                     ctx->Shared->NullBufferObj);
 144    }
 145 }
 146
 147
 148 GLboolean _vbo_CreateContext( struct gl_context *ctx )
 149 {
 150    struct vbo_context *vbo = CALLOC_STRUCT(vbo_context);
 151
 152    ctx->vbo_context = vbo;
 153
 154    /* Initialize the arrayelt helper
 155     */
 156    if (!ctx->aelt_context &&
 157        !_ae_create_context( ctx )) {
 158       return GL_FALSE;
 159    }
 160
 161    init_legacy_currval( ctx );
 162    init_generic_currval( ctx );
 163    init_mat_currval( ctx );
 164
 165    /* Build mappings from VERT_ATTRIB -> VBO_ATTRIB depending on type
 166     * of vertex program active.
 167     */
 168    {
 169       GLuint i;
 170
 171       /* identity mapping */
 172       for (i = 0; i < ARRAY_SIZE(vbo->map_vp_none); i++)
 173          vbo->map_vp_none[i] = i;
 174       /* map material attribs to generic slots */
 175       for (i = 0; i < MAT_ATTRIB_MAX; i++)
 176          vbo->map_vp_none[VERT_ATTRIB_GENERIC(i)]
 177             = VBO_ATTRIB_MAT_FRONT_AMBIENT + i;
 178
 179       for (i = 0; i < ARRAY_SIZE(vbo->map_vp_arb); i++)
 180          vbo->map_vp_arb[i] = i;
 181    }
 182
 183
 184    /* Hook our functions into exec and compile dispatch tables.  These
 185     * will pretty much be permanently installed, which means that the
 186     * vtxfmt mechanism can be removed now.
 187     */
 188    vbo_exec_init( ctx );
 189    if (ctx->API == API_OPENGL_COMPAT)
 190       vbo_save_init( ctx );
 191
 192    _math_init_eval();
 193
 194    return GL_TRUE;
 195 }
 196
 197
 198 void _vbo_InvalidateState( struct gl_context *ctx, GLuint new_state )
 199 {
 200    vbo_exec_invalidate_state(ctx, new_state);
 201 }
 202
 203
 204 void _vbo_DestroyContext( struct gl_context *ctx )
 205 {
 206    struct vbo_context *vbo = vbo_context(ctx);
 207
 208    if (ctx->aelt_context) {
 209       _ae_destroy_context( ctx );
 210       ctx->aelt_context = NULL;
 211    }
 212
 213    if (vbo) {
 214       GLuint i;
 215
 216       for (i = 0; i < VBO_ATTRIB_MAX; i++) {
 217          _mesa_reference_buffer_object(ctx, &vbo->currval[i].BufferObj, NULL);
 218       }
 219
 220       vbo_exec_destroy(ctx);
 221       if (ctx->API == API_OPENGL_COMPAT)
 222          vbo_save_destroy(ctx);
 223       free(vbo);
 224       ctx->vbo_context = NULL;
 225    }
 226 }
 227
 228
 229 void vbo_set_draw_func(struct gl_context *ctx, vbo_draw_func func)
 230 {
 231    struct vbo_context *vbo = vbo_context(ctx);
 232    vbo->draw_prims = func;
 233 }
 234