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
  38 check_size(const GLfloat *attr)
  39 {
  40    if (attr[3] != 1.0F)
  41       return 4;
  42    if (attr[2] != 0.0F)
  43       return 3;
  44    if (attr[1] != 0.0F)
  45       return 2;
  46    return 1;
  47 }
  48
  49
  50 /**
  51  * Helper for initializing a vertex array.
  52  */
  53 static void
  54 init_array(struct gl_context *ctx, struct gl_vertex_array *cl,
  55            unsigned size, const void *pointer)
  56 {
  57    memset(cl, 0, sizeof(*cl));
  58
  59    cl->Size = size;
  60    cl->Type = GL_FLOAT;
  61    cl->Format = GL_RGBA;
  62    cl->StrideB = 0;
  63    cl->_ElementSize = cl->Size * sizeof(GLfloat);
  64    cl->Ptr = pointer;
  65
  66    _mesa_reference_buffer_object(ctx, &cl->BufferObj,
  67                                  ctx->Shared->NullBufferObj);
  68 }
  69
  70
  71 /**
  72  * Set up the vbo->currval arrays to point at the context's current
  73  * vertex attributes (with strides = 0).
  74  */
  75 static void
  76 init_legacy_currval(struct gl_context *ctx)
  77 {
  78    struct vbo_context *vbo = vbo_context(ctx);
  79    GLuint i;
  80
  81    /* Set up a constant (StrideB == 0) array for each current
  82     * attribute:
  83     */
  84    for (i = 0; i < VERT_ATTRIB_FF_MAX; i++) {
  85       struct gl_vertex_array *cl = &vbo->currval[VERT_ATTRIB_FF(i)];
  86
  87       init_array(ctx, cl,
  88                  check_size(ctx->Current.Attrib[i]),
  89                  ctx->Current.Attrib[i]);
  90    }
  91 }
  92
  93
  94 static void
  95 init_generic_currval(struct gl_context *ctx)
  96 {
  97    struct vbo_context *vbo = vbo_context(ctx);
  98    GLuint i;
  99
 100    for (i = 0; i < VERT_ATTRIB_GENERIC_MAX; i++) {
 101       struct gl_vertex_array *cl = &vbo->currval[VBO_ATTRIB_GENERIC0 + i];
 102
 103       init_array(ctx, cl, 1, ctx->Current.Attrib[VERT_ATTRIB_GENERIC0 + i]);
 104    }
 105 }
 106
 107
 108 static void
 109 init_mat_currval(struct gl_context *ctx)
 110 {
 111    struct vbo_context *vbo = vbo_context(ctx);
 112    GLuint i;
 113
 114    /* Set up a constant (StrideB == 0) array for each current
 115     * attribute:
 116     */
 117    for (i = 0; i < MAT_ATTRIB_MAX; i++) {
 118       struct gl_vertex_array *cl =
 119          &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT + i];
 120       unsigned size;
 121
 122       /* Size is fixed for the material attributes, for others will
 123        * be determined at runtime:
 124        */
 125       switch (i) {
 126       case MAT_ATTRIB_FRONT_SHININESS:
 127       case MAT_ATTRIB_BACK_SHININESS:
 128          size = 1;
 129          break;
 130       case MAT_ATTRIB_FRONT_INDEXES:
 131       case MAT_ATTRIB_BACK_INDEXES:
 132          size = 3;
 133          break;
 134       default:
 135          size = 4;
 136          break;
 137       }
 138
 139       init_array(ctx, cl, size, ctx->Light.Material.Attrib[i]);
 140    }
 141 }
 142
 143 static void
 144 vbo_draw_indirect_prims(struct gl_context *ctx,
 145                         GLuint mode,
 146                         struct gl_buffer_object *indirect_data,
 147                         GLsizeiptr indirect_offset,
 148                         unsigned draw_count,
 149                         unsigned stride,
 150                         struct gl_buffer_object *indirect_params,
 151                         GLsizeiptr indirect_params_offset,
 152                         const struct _mesa_index_buffer *ib)
 153 {
 154    struct vbo_context *vbo = vbo_context(ctx);
 155    struct _mesa_prim *prim;
 156    GLsizei i;
 157
 158    prim = calloc(draw_count, sizeof(*prim));
 159    if (prim == NULL) {
 160       _mesa_error(ctx, GL_OUT_OF_MEMORY, "gl%sDraw%sIndirect%s",
 161                   (draw_count > 1) ? "Multi" : "",
 162                   ib ? "Elements" : "Arrays",
 163                   indirect_params ? "CountARB" : "");
 164       return;
 165    }
 166
 167    prim[0].begin = 1;
 168    prim[draw_count - 1].end = 1;
 169    for (i = 0; i < draw_count; ++i, indirect_offset += stride) {
 170       prim[i].mode = mode;
 171       prim[i].indexed = !!ib;
 172       prim[i].indirect_offset = indirect_offset;
 173       prim[i].is_indirect = 1;
 174       prim[i].draw_id = i;
 175    }
 176
 177    vbo->draw_prims(ctx, prim, draw_count,
 178                    ib, false, 0, ~0,
 179                    NULL, 0,
 180                    ctx->DrawIndirectBuffer);
 181
 182    free(prim);
 183 }
 184
 185
 186 GLboolean
 187 _vbo_CreateContext(struct gl_context *ctx)
 188 {
 189    struct vbo_context *vbo = CALLOC_STRUCT(vbo_context);
 190
 191    ctx->vbo_context = vbo;
 192
 193    /* Initialize the arrayelt helper
 194     */
 195    if (!ctx->aelt_context &&
 196        !_ae_create_context(ctx)) {
 197       return GL_FALSE;
 198    }
 199
 200    init_legacy_currval(ctx);
 201    init_generic_currval(ctx);
 202    init_mat_currval(ctx);
 203    vbo_set_indirect_draw_func(ctx, vbo_draw_indirect_prims);
 204
 205    /* Build mappings from VERT_ATTRIB -> VBO_ATTRIB depending on type
 206     * of vertex program active.
 207     */
 208    {
 209       GLuint i;
 210
 211       /* make sure all VBO_ATTRIB_ values can fit in an unsigned byte */
 212       STATIC_ASSERT(VBO_ATTRIB_MAX <= 255);
 213
 214       /* identity mapping */
 215       for (i = 0; i < ARRAY_SIZE(vbo->map_vp_none); i++)
 216          vbo->map_vp_none[i] = i;
 217       /* map material attribs to generic slots */
 218       for (i = 0; i < MAT_ATTRIB_MAX; i++)
 219          vbo->map_vp_none[VERT_ATTRIB_GENERIC(i)]
 220             = VBO_ATTRIB_MAT_FRONT_AMBIENT + i;
 221
 222       for (i = 0; i < ARRAY_SIZE(vbo->map_vp_arb); i++)
 223          vbo->map_vp_arb[i] = i;
 224    }
 225
 226
 227    /* Hook our functions into exec and compile dispatch tables.  These
 228     * will pretty much be permanently installed, which means that the
 229     * vtxfmt mechanism can be removed now.
 230     */
 231    vbo_exec_init(ctx);
 232    if (ctx->API == API_OPENGL_COMPAT)
 233       vbo_save_init(ctx);
 234
 235    _math_init_eval();
 236
 237    return GL_TRUE;
 238 }
 239
 240
 241 void
 242 _vbo_DestroyContext(struct gl_context *ctx)
 243 {
 244    struct vbo_context *vbo = vbo_context(ctx);
 245
 246    if (ctx->aelt_context) {
 247       _ae_destroy_context(ctx);
 248       ctx->aelt_context = NULL;
 249    }
 250
 251    if (vbo) {
 252       GLuint i;
 253
 254       for (i = 0; i < VBO_ATTRIB_MAX; i++) {
 255          _mesa_reference_buffer_object(ctx, &vbo->currval[i].BufferObj, NULL);
 256       }
 257
 258       vbo_exec_destroy(ctx);
 259       if (ctx->API == API_OPENGL_COMPAT)
 260          vbo_save_destroy(ctx);
 261       free(vbo);
 262       ctx->vbo_context = NULL;
 263    }
 264 }
 265
 266
 267 void
 268 vbo_set_draw_func(struct gl_context *ctx, vbo_draw_func func)
 269 {
 270    struct vbo_context *vbo = vbo_context(ctx);
 271    vbo->draw_prims = func;
 272 }
 273
 274
 275 void
 276 vbo_set_indirect_draw_func(struct gl_context *ctx,
 277                            vbo_indirect_draw_func func)
 278 {
 279    struct vbo_context *vbo = vbo_context(ctx);
 280    vbo->draw_indirect_prims = func;
 281 }