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