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_exec_context *exec = &vbo_context(ctx)->exec;
  85    GLuint i;
  86
  87    /* TODO: Fix the ArrayObj struct to keep legacy arrays in an array
  88     * rather than as individual named arrays.  Then this function can
  89     * go away.
  90     */
  91    exec->array.legacy_array[VERT_ATTRIB_POS] = &ctx->Array.ArrayObj->Vertex;
  92    exec->array.legacy_array[VERT_ATTRIB_NORMAL] = &ctx->Array.ArrayObj->Normal;
  93    exec->array.legacy_array[VERT_ATTRIB_COLOR0] = &ctx->Array.ArrayObj->Color;
  94    exec->array.legacy_array[VERT_ATTRIB_COLOR1] = &ctx->Array.ArrayObj->SecondaryColor;
  95    exec->array.legacy_array[VERT_ATTRIB_FOG] = &ctx->Array.ArrayObj->FogCoord;
  96    exec->array.legacy_array[VERT_ATTRIB_COLOR_INDEX] = &ctx->Array.ArrayObj->Index;
  97    exec->array.legacy_array[VBO_ATTRIB_EDGEFLAG] = &ctx->Array.ArrayObj->EdgeFlag;
  98
  99    for (i = 0; i < 8; i++)
 100       exec->array.legacy_array[VBO_ATTRIB_TEX0 + i] = &ctx->Array.ArrayObj->TexCoord[i];
 101
 102    for (i = 0; i < VERT_ATTRIB_MAX; i++)
 103       exec->array.generic_array[i] = &ctx->Array.ArrayObj->VertexAttrib[i];
 104
 105    exec->array.array_obj = ctx->Array.ArrayObj->Name;
 106 }
 107
 108 static void recalculate_input_bindings( GLcontext *ctx )
 109 {
 110    struct vbo_exec_context *exec = &vbo_context(ctx)->exec;
 111    const struct gl_client_array **inputs = &exec->array.inputs[0];
 112    GLuint i;
 113
 114    exec->array.program_mode = get_program_mode(ctx);
 115    exec->array.enabled_flags = ctx->Array.ArrayObj->_Enabled;
 116
 117    /* TODO:  Get rid of NV_program (please!).
 118     */
 119    switch (exec->array.program_mode) {
 120    case VP_NONE:
 121       /* When no vertex program is active, we put the material values
 122        * into the generic slots.  This is the only situation where
 123        * material values are available as per-vertex attributes.
 124        */
 125       for (i = 0; i <= VERT_ATTRIB_TEX7; i++) {
 126          if (exec->array.legacy_array[i]->Enabled)
 127             inputs[i] = exec->array.legacy_array[i];
 128          else
 129             inputs[i] = &exec->legacy_currval[i];
 130       }
 131
 132       for (i = 0; i < MAT_ATTRIB_MAX; i++) {
 133          inputs[VERT_ATTRIB_GENERIC0 + i] = &exec->mat_currval[i];
 134       }
 135       break;
 136    case VP_NV:
 137       /* NV_vertex_program - attribute arrays alias and override
 138        * conventional, legacy arrays.  No materials, and the generic
 139        * slots are vacant.
 140        */
 141       for (i = 0; i <= VERT_ATTRIB_TEX7; i++) {
 142          if (exec->array.generic_array[i]->Enabled)
 143             inputs[i] = exec->array.generic_array[i];
 144          else if (exec->array.legacy_array[i]->Enabled)
 145             inputs[i] = exec->array.legacy_array[i];
 146          else
 147             inputs[i] = &exec->legacy_currval[i];
 148       }
 149       break;
 150    case VP_ARB:
 151       /* ARB_vertex_program - Only the attribute zero (position) array
 152        * aliases and overrides the legacy position array.
 153        *
 154        * Otherwise, legacy attributes available in the legacy slots,
 155        * generic attributes in the generic slots and materials are not
 156        * available as per-vertex attributes.
 157        */
 158       if (exec->array.generic_array[0]->Enabled)
 159          inputs[0] = exec->array.generic_array[0];
 160       else if (exec->array.legacy_array[0]->Enabled)
 161          inputs[0] = exec->array.legacy_array[0];
 162       else
 163          inputs[0] = &exec->legacy_currval[0];
 164
 165
 166       for (i = 1; i <= VERT_ATTRIB_TEX7; i++) {
 167          if (exec->array.legacy_array[i]->Enabled)
 168             inputs[i] = exec->array.legacy_array[i];
 169          else
 170             inputs[i] = &exec->legacy_currval[i];
 171       }
 172
 173       for (i = 0; i < 16; i++) {
 174          if (exec->array.generic_array[0]->Enabled)
 175             inputs[VERT_ATTRIB_GENERIC0 + i] = exec->array.generic_array[i];
 176          else
 177             inputs[VERT_ATTRIB_GENERIC0 + i] = &exec->generic_currval[i];
 178       }
 179       break;
 180    }
 181 }
 182
 183 static void bind_arrays( GLcontext *ctx )
 184 {
 185 #if 0
 186    if (ctx->Array.ArrayObj.Name != exec->array.array_obj) {
 187       bind_array_obj(ctx);
 188       recalculate_input_bindings(ctx);
 189    }
 190    else if (exec->array.program_mode != get_program_mode(ctx) ||
 191             exec->array.enabled_flags != ctx->Array.ArrayObj->_Enabled) {
 192
 193       recalculate_input_bindings(ctx);
 194    }
 195 #else
 196    bind_array_obj(ctx);
 197    recalculate_input_bindings(ctx);
 198 #endif
 199 }
 200
 201
 202
 203 /***********************************************************************
 204  * API functions.
 205  */
 206
 207 static void GLAPIENTRY
 208 vbo_exec_DrawArrays(GLenum mode, GLint start, GLsizei count)
 209 {
 210    GET_CURRENT_CONTEXT(ctx);
 211    struct vbo_context *vbo = vbo_context(ctx);
 212    struct vbo_exec_context *exec = &vbo->exec;
 213    struct _mesa_prim prim[1];
 214
 215    if (!_mesa_validate_DrawArrays( ctx, mode, start, count ))
 216       return;
 217
 218    FLUSH_CURRENT( ctx, 0 );
 219
 220    if (ctx->NewState)
 221       _mesa_update_state( ctx );
 222
 223    bind_arrays( ctx );
 224
 225    prim[0].begin = 1;
 226    prim[0].end = 1;
 227    prim[0].weak = 0;
 228    prim[0].pad = 0;
 229
 230    if (exec->array.inputs[0]->BufferObj->Name) {
 231       /* Use vertex attribute as a hint to tell us if we expect all
 232        * arrays to be in VBO's and if so, don't worry about avoiding
 233        * the upload of elements < start.
 234        */
 235       prim[0].mode = mode;
 236       prim[0].start = start;
 237       prim[0].count = count;
 238       prim[0].indexed = 0;
 239
 240       vbo->draw_prims( ctx, exec->array.inputs, prim, 1, NULL, 0, start + count );
 241    }
 242    else {
 243       /* If not using VBO's, we don't want to upload any more elements
 244        * than necessary from the arrays as they will not be valid next
 245        * time the application tries to draw with them.
 246        */
 247       prim[0].mode = mode;
 248       prim[0].start = 0;
 249       prim[0].count = count;
 250       prim[0].indexed = 0;
 251
 252       vbo->draw_prims( ctx, exec->array.inputs, prim, 1, NULL, start, start + count );
 253    }
 254 }
 255
 256
 257
 258 static void GLAPIENTRY
 259 vbo_exec_DrawRangeElements(GLenum mode,
 260                            GLuint start, GLuint end,
 261                            GLsizei count, GLenum type, const GLvoid *indices)
 262 {
 263    GET_CURRENT_CONTEXT(ctx);
 264    struct vbo_context *vbo = vbo_context(ctx);
 265    struct vbo_exec_context *exec = &vbo->exec;
 266    struct _mesa_index_buffer ib;
 267    struct _mesa_prim prim[1];
 268
 269    if (!_mesa_validate_DrawRangeElements( ctx, mode, start, end, count, type, indices ))
 270       return;
 271
 272    FLUSH_CURRENT( ctx, 0 );
 273
 274    if (ctx->NewState)
 275       _mesa_update_state( ctx );
 276
 277    ib.count = count;
 278    ib.type = type;
 279    ib.obj = ctx->Array.ElementArrayBufferObj;
 280    ib.ptr = indices;
 281
 282    if (ctx->Array.ElementArrayBufferObj->Name) {
 283       /* Use the fact that indices are in a VBO as a hint that the
 284        * program has put all the arrays in VBO's and we don't have to
 285        * worry about performance implications of start > 0.
 286        *
 287        * XXX: consider passing start as min_index to draw_prims instead.
 288        */
 289       ib.rebase = 0;
 290    }
 291    else {
 292       ib.rebase = start;
 293    }
 294
 295    prim[0].begin = 1;
 296    prim[0].end = 1;
 297    prim[0].weak = 0;
 298    prim[0].pad = 0;
 299    prim[0].mode = mode;
 300    prim[0].start = 0;
 301    prim[0].count = count;
 302    prim[0].indexed = 1;
 303
 304    vbo->draw_prims( ctx, exec->array.inputs, prim, 1, &ib, ib.rebase, end+1 );
 305 }
 306
 307
 308 static void GLAPIENTRY
 309 vbo_exec_DrawElements(GLenum mode, GLsizei count, GLenum type, const GLvoid *indices)
 310 {
 311    GET_CURRENT_CONTEXT(ctx);
 312    GLuint max_index;
 313
 314    if (!_mesa_validate_DrawElements( ctx, mode, count, type, indices ))
 315       return;
 316
 317    if (ctx->Array.ElementArrayBufferObj->Name) {
 318       const GLvoid *map = ctx->Driver.MapBuffer(ctx,
 319                                                  GL_ELEMENT_ARRAY_BUFFER_ARB,
 320                                                  GL_DYNAMIC_READ_ARB,
 321                                                  ctx->Array.ElementArrayBufferObj);
 322
 323       max_index = get_max_index(count, type, ADD_POINTERS(map, indices));
 324
 325       ctx->Driver.UnmapBuffer(ctx,
 326                               GL_ELEMENT_ARRAY_BUFFER_ARB,
 327                               ctx->Array.ElementArrayBufferObj);
 328    }
 329    else {
 330       max_index = get_max_index(count, type, indices);
 331    }
 332
 333    vbo_exec_DrawRangeElements(mode, 0, max_index, count, type, indices);
 334 }
 335
 336
 337 /***********************************************************************
 338  * Initialization
 339  */
 340
 341
 342
 343
 344 void vbo_exec_array_init( struct vbo_exec_context *exec )
 345 {
 346    GLcontext *ctx = exec->ctx;
 347
 348 #if 1
 349    exec->vtxfmt.DrawArrays = vbo_exec_DrawArrays;
 350    exec->vtxfmt.DrawElements = vbo_exec_DrawElements;
 351    exec->vtxfmt.DrawRangeElements = vbo_exec_DrawRangeElements;
 352 #else
 353    exec->vtxfmt.DrawArrays = _mesa_noop_DrawArrays;
 354    exec->vtxfmt.DrawElements = _mesa_noop_DrawElements;
 355    exec->vtxfmt.DrawRangeElements = _mesa_noop_DrawRangeElements;
 356 #endif
 357
 358    exec->array.index_obj = ctx->Driver.NewBufferObject(ctx, 1, GL_ARRAY_BUFFER_ARB);
 359 }
 360
 361
 362 void vbo_exec_array_destroy( struct vbo_exec_context *exec )
 363 {
 364    GLcontext *ctx = exec->ctx;
 365
 366    ctx->Driver.DeleteBuffer(ctx, exec->array.index_obj);
 367 }