src/mesa/vbo/vbo_exec_array.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * 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
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "glheader.h"
  29 #include "context.h"
  30 #include "state.h"
  31 #include "api_validate.h"
  32 #include "api_noop.h"
  33 #include "dispatch.h"
  34
  35 #include "vbo_context.h"
  36
  37 static GLuint get_max_index( GLuint count, GLuint type,
  38                              const GLvoid *indices )
  39 {
  40    GLint i;
  41
  42    /* Compute max element.  This is only needed for upload of non-VBO,
  43     * non-constant data elements.
  44     *
  45     * XXX: Postpone this calculation until it is known that it is
  46     * needed.  Otherwise could scan this pointlessly in the all-vbo
  47     * case.
  48     */
  49    switch(type) {
  50    case GL_UNSIGNED_INT: {
  51       const GLuint *ui_indices = (const GLuint *)indices;
  52       GLuint max_ui = 0;
  53       for (i = 0; i < count; i++)
  54          if (ui_indices[i] > max_ui)
  55             max_ui = ui_indices[i];
  56       return max_ui;
  57    }
  58    case GL_UNSIGNED_SHORT: {
  59       const GLushort *us_indices = (const GLushort *)indices;
  60       GLuint max_us = 0;
  61       for (i = 0; i < count; i++)
  62          if (us_indices[i] > max_us)
  63             max_us = us_indices[i];
  64       return max_us;
  65    }
  66    case GL_UNSIGNED_BYTE: {
  67       const GLubyte *ub_indices = (const GLubyte *)indices;
  68       GLuint max_ub = 0;
  69       for (i = 0; i < count; i++)
  70          if (ub_indices[i] > max_ub)
  71             max_ub = ub_indices[i];
  72       return max_ub;
  73    }
  74    default:
  75       return 0;
  76    }
  77 }
  78
  79
  80 /* Just translate the arrayobj into a sane layout.
  81  */
  82 static void bind_array_obj( GLcontext *ctx )
  83 {
  84    struct vbo_context *vbo = vbo_context(ctx);
  85    struct vbo_exec_context *exec = &vbo->exec;
  86    GLuint i;
  87
  88    /* TODO: Fix the ArrayObj struct to keep legacy arrays in an array
  89     * rather than as individual named arrays.  Then this function can
  90     * go away.
  91     */
  92    exec->array.legacy_array[VERT_ATTRIB_POS] = &ctx->Array.ArrayObj->Vertex;
  93    exec->array.legacy_array[VERT_ATTRIB_WEIGHT] = &vbo->legacy_currval[VERT_ATTRIB_WEIGHT];
  94    exec->array.legacy_array[VERT_ATTRIB_NORMAL] = &ctx->Array.ArrayObj->Normal;
  95    exec->array.legacy_array[VERT_ATTRIB_COLOR0] = &ctx->Array.ArrayObj->Color;
  96    exec->array.legacy_array[VERT_ATTRIB_COLOR1] = &ctx->Array.ArrayObj->SecondaryColor;
  97    exec->array.legacy_array[VERT_ATTRIB_FOG] = &ctx->Array.ArrayObj->FogCoord;
  98    exec->array.legacy_array[VERT_ATTRIB_COLOR_INDEX] = &ctx->Array.ArrayObj->Index;
  99    exec->array.legacy_array[VBO_ATTRIB_EDGEFLAG] = &ctx->Array.ArrayObj->EdgeFlag;
 100
 101    for (i = 0; i < 8; i++)
 102       exec->array.legacy_array[VBO_ATTRIB_TEX0 + i] = &ctx->Array.ArrayObj->TexCoord[i];
 103
 104    for (i = 0; i < VERT_ATTRIB_MAX; i++)
 105       exec->array.generic_array[i] = &ctx->Array.ArrayObj->VertexAttrib[i];
 106
 107    exec->array.array_obj = ctx->Array.ArrayObj->Name;
 108 }
 109
 110 static void recalculate_input_bindings( GLcontext *ctx )
 111 {
 112    struct vbo_context *vbo = vbo_context(ctx);
 113    struct vbo_exec_context *exec = &vbo->exec;
 114    const struct gl_client_array **inputs = &exec->array.inputs[0];
 115    GLuint i;
 116
 117    exec->array.program_mode = get_program_mode(ctx);
 118    exec->array.enabled_flags = ctx->Array.ArrayObj->_Enabled;
 119
 120    /* TODO:  Get rid of NV_program (please!).
 121     */
 122    switch (exec->array.program_mode) {
 123    case VP_NONE:
 124       /* When no vertex program is active, we put the material values
 125        * into the generic slots.  This is the only situation where
 126        * material values are available as per-vertex attributes.
 127        */
 128       for (i = 0; i <= VERT_ATTRIB_TEX7; i++) {
 129          if (exec->array.legacy_array[i]->Enabled)
 130             inputs[i] = exec->array.legacy_array[i];
 131          else
 132             inputs[i] = &vbo->legacy_currval[i];
 133       }
 134
 135       for (i = 0; i < MAT_ATTRIB_MAX; i++) {
 136          inputs[VERT_ATTRIB_GENERIC0 + i] = &vbo->mat_currval[i];
 137       }
 138
 139       /* Could use just about anything, just to fill in the empty
 140        * slots:
 141        */
 142       for (i = MAT_ATTRIB_MAX; i < VERT_ATTRIB_MAX; i++)
 143          inputs[i] = &vbo->generic_currval[i - VERT_ATTRIB_GENERIC0];
 144
 145       break;
 146    case VP_NV:
 147       /* NV_vertex_program - attribute arrays alias and override
 148        * conventional, legacy arrays.  No materials, and the generic
 149        * slots are vacant.
 150        */
 151       for (i = 0; i <= VERT_ATTRIB_TEX7; i++) {
 152          if (exec->array.generic_array[i]->Enabled)
 153             inputs[i] = exec->array.generic_array[i];
 154          else if (exec->array.legacy_array[i]->Enabled)
 155             inputs[i] = exec->array.legacy_array[i];
 156          else
 157             inputs[i] = &vbo->legacy_currval[i];
 158       }
 159
 160       /* Could use just about anything, just to fill in the empty
 161        * slots:
 162        */
 163       for (i = VERT_ATTRIB_GENERIC0; i < VERT_ATTRIB_MAX; i++)
 164          inputs[i] = &vbo->generic_currval[i - VERT_ATTRIB_GENERIC0];
 165
 166       break;
 167    case VP_ARB:
 168       /* ARB_vertex_program - Only the attribute zero (position) array
 169        * aliases and overrides the legacy position array.
 170        *
 171        * Otherwise, legacy attributes available in the legacy slots,
 172        * generic attributes in the generic slots and materials are not
 173        * available as per-vertex attributes.
 174        */
 175       if (exec->array.generic_array[0]->Enabled)
 176          inputs[0] = exec->array.generic_array[0];
 177       else if (exec->array.legacy_array[0]->Enabled)
 178          inputs[0] = exec->array.legacy_array[0];
 179       else
 180          inputs[0] = &vbo->legacy_currval[0];
 181
 182
 183       for (i = 1; i <= VERT_ATTRIB_TEX7; i++) {
 184          if (exec->array.legacy_array[i]->Enabled)
 185             inputs[i] = exec->array.legacy_array[i];
 186          else
 187             inputs[i] = &vbo->legacy_currval[i];
 188       }
 189
 190       for (i = 0; i < 16; i++) {
 191          if (exec->array.generic_array[0]->Enabled)
 192             inputs[VERT_ATTRIB_GENERIC0 + i] = exec->array.generic_array[i];
 193          else
 194             inputs[VERT_ATTRIB_GENERIC0 + i] = &vbo->generic_currval[i];
 195       }
 196       break;
 197    }
 198 }
 199
 200 static void bind_arrays( GLcontext *ctx )
 201 {
 202 #if 0
 203    if (ctx->Array.ArrayObj.Name != exec->array.array_obj) {
 204       bind_array_obj(ctx);
 205       recalculate_input_bindings(ctx);
 206    }
 207    else if (exec->array.program_mode != get_program_mode(ctx) ||
 208             exec->array.enabled_flags != ctx->Array.ArrayObj->_Enabled) {
 209
 210       recalculate_input_bindings(ctx);
 211    }
 212 #else
 213    bind_array_obj(ctx);
 214    recalculate_input_bindings(ctx);
 215 #endif
 216 }
 217
 218
 219
 220 /***********************************************************************
 221  * API functions.
 222  */
 223
 224 static void GLAPIENTRY
 225 vbo_exec_DrawArrays(GLenum mode, GLint start, GLsizei count)
 226 {
 227    GET_CURRENT_CONTEXT(ctx);
 228    struct vbo_context *vbo = vbo_context(ctx);
 229    struct vbo_exec_context *exec = &vbo->exec;
 230    struct _mesa_prim prim[1];
 231
 232    if (!_mesa_validate_DrawArrays( ctx, mode, start, count ))
 233       return;
 234
 235    FLUSH_CURRENT( ctx, 0 );
 236
 237    if (ctx->NewState)
 238       _mesa_update_state( ctx );
 239
 240    bind_arrays( ctx );
 241
 242    prim[0].begin = 1;
 243    prim[0].end = 1;
 244    prim[0].weak = 0;
 245    prim[0].pad = 0;
 246
 247    if (exec->array.inputs[0]->BufferObj->Name) {
 248       /* Use vertex attribute as a hint to tell us if we expect all
 249        * arrays to be in VBO's and if so, don't worry about avoiding
 250        * the upload of elements < start.
 251        */
 252       prim[0].mode = mode;
 253       prim[0].start = start;
 254       prim[0].count = count;
 255       prim[0].indexed = 0;
 256
 257       vbo->draw_prims( ctx, exec->array.inputs, prim, 1, NULL, 0, start + count );
 258    }
 259    else {
 260       /* If not using VBO's, we don't want to upload any more elements
 261        * than necessary from the arrays as they will not be valid next
 262        * time the application tries to draw with them.
 263        */
 264       prim[0].mode = mode;
 265       prim[0].start = 0;
 266       prim[0].count = count;
 267       prim[0].indexed = 0;
 268
 269       vbo->draw_prims( ctx, exec->array.inputs, prim, 1, NULL, start, start + count );
 270    }
 271 }
 272
 273
 274
 275 static void GLAPIENTRY
 276 vbo_exec_DrawRangeElements(GLenum mode,
 277                            GLuint start, GLuint end,
 278                            GLsizei count, GLenum type, const GLvoid *indices)
 279 {
 280    GET_CURRENT_CONTEXT(ctx);
 281    struct vbo_context *vbo = vbo_context(ctx);
 282    struct vbo_exec_context *exec = &vbo->exec;
 283    struct _mesa_index_buffer ib;
 284    struct _mesa_prim prim[1];
 285
 286    if (!_mesa_validate_DrawRangeElements( ctx, mode, start, end, count, type, indices ))
 287       return;
 288
 289    FLUSH_CURRENT( ctx, 0 );
 290
 291    if (ctx->NewState)
 292       _mesa_update_state( ctx );
 293
 294    ib.count = count;
 295    ib.type = type;
 296    ib.obj = ctx->Array.ElementArrayBufferObj;
 297    ib.ptr = indices;
 298
 299    if (ctx->Array.ElementArrayBufferObj->Name) {
 300       /* Use the fact that indices are in a VBO as a hint that the
 301        * program has put all the arrays in VBO's and we don't have to
 302        * worry about performance implications of start > 0.
 303        *
 304        * XXX: consider passing start as min_index to draw_prims instead.
 305        */
 306       ib.rebase = 0;
 307    }
 308    else {
 309       ib.rebase = start;
 310    }
 311
 312    prim[0].begin = 1;
 313    prim[0].end = 1;
 314    prim[0].weak = 0;
 315    prim[0].pad = 0;
 316    prim[0].mode = mode;
 317    prim[0].start = 0;
 318    prim[0].count = count;
 319    prim[0].indexed = 1;
 320
 321    vbo->draw_prims( ctx, exec->array.inputs, prim, 1, &ib, ib.rebase, end+1 );
 322 }
 323
 324
 325 static void GLAPIENTRY
 326 vbo_exec_DrawElements(GLenum mode, GLsizei count, GLenum type, const GLvoid *indices)
 327 {
 328    GET_CURRENT_CONTEXT(ctx);
 329    GLuint max_index;
 330
 331    if (!_mesa_validate_DrawElements( ctx, mode, count, type, indices ))
 332       return;
 333
 334    if (ctx->Array.ElementArrayBufferObj->Name) {
 335       const GLvoid *map = ctx->Driver.MapBuffer(ctx,
 336                                                  GL_ELEMENT_ARRAY_BUFFER_ARB,
 337                                                  GL_DYNAMIC_READ_ARB,
 338                                                  ctx->Array.ElementArrayBufferObj);
 339
 340       max_index = get_max_index(count, type, ADD_POINTERS(map, indices));
 341
 342       ctx->Driver.UnmapBuffer(ctx,
 343                               GL_ELEMENT_ARRAY_BUFFER_ARB,
 344                               ctx->Array.ElementArrayBufferObj);
 345    }
 346    else {
 347       max_index = get_max_index(count, type, indices);
 348    }
 349
 350    vbo_exec_DrawRangeElements(mode, 0, max_index, count, type, indices);
 351 }
 352
 353
 354 /***********************************************************************
 355  * Initialization
 356  */
 357
 358
 359
 360
 361 void vbo_exec_array_init( struct vbo_exec_context *exec )
 362 {
 363    GLcontext *ctx = exec->ctx;
 364
 365 #if 1
 366    exec->vtxfmt.DrawArrays = vbo_exec_DrawArrays;
 367    exec->vtxfmt.DrawElements = vbo_exec_DrawElements;
 368    exec->vtxfmt.DrawRangeElements = vbo_exec_DrawRangeElements;
 369 #else
 370    exec->vtxfmt.DrawArrays = _mesa_noop_DrawArrays;
 371    exec->vtxfmt.DrawElements = _mesa_noop_DrawElements;
 372    exec->vtxfmt.DrawRangeElements = _mesa_noop_DrawRangeElements;
 373 #endif
 374
 375    exec->array.index_obj = ctx->Driver.NewBufferObject(ctx, 1, GL_ARRAY_BUFFER_ARB);
 376 }
 377
 378
 379 void vbo_exec_array_destroy( struct vbo_exec_context *exec )
 380 {
 381    GLcontext *ctx = exec->ctx;
 382
 383    ctx->Driver.DeleteBuffer(ctx, exec->array.index_obj);
 384 }