src/mesa/vbo/vbo_save_draw.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  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
  25 /* Author:
  26  *    Keith Whitwell <keithw@vmware.com>
  27  */
  28
  29 #include "main/glheader.h"
  30 #include "main/bufferobj.h"
  31 #include "main/context.h"
  32 #include "main/imports.h"
  33 #include "main/mtypes.h"
  34 #include "main/macros.h"
  35 #include "main/light.h"
  36 #include "main/state.h"
  37 #include "util/bitscan.h"
  38
  39 #include "vbo_context.h"
  40
  41
  42 /**
  43  * After playback, copy everything but the position from the
  44  * last vertex to the saved state
  45  */
  46 static void
  47 playback_copy_to_current(struct gl_context *ctx,
  48                          const struct vbo_save_vertex_list *node)
  49 {
  50    struct vbo_context *vbo = vbo_context(ctx);
  51    fi_type vertex[VBO_ATTRIB_MAX * 4];
  52    fi_type *data;
  53    GLbitfield64 mask;
  54    GLuint offset;
  55
  56    if (node->current_size == 0)
  57       return;
  58
  59    if (node->current_data) {
  60       data = node->current_data;
  61    }
  62    else {
  63       data = vertex;
  64
  65       if (node->vertex_count)
  66          offset = (node->buffer_offset +
  67                    (node->vertex_count - 1)
  68                    * node->vertex_size * sizeof(GLfloat));
  69       else
  70          offset = node->buffer_offset;
  71
  72       ctx->Driver.GetBufferSubData(ctx, offset,
  73                                    node->vertex_size * sizeof(GLfloat),
  74                                    data, node->vertex_store->bufferobj);
  75
  76       data += node->attrsz[0]; /* skip vertex position */
  77    }
  78
  79    mask = node->enabled & (~BITFIELD64_BIT(VBO_ATTRIB_POS));
  80    while (mask) {
  81       const int i = u_bit_scan64(&mask);
  82       fi_type *current = (fi_type *)vbo->currval[i].Ptr;
  83       fi_type tmp[4];
  84       assert(node->attrsz[i]);
  85
  86       COPY_CLEAN_4V_TYPE_AS_UNION(tmp,
  87                                   node->attrsz[i],
  88                                   data,
  89                                   node->attrtype[i]);
  90
  91       if (node->attrtype[i] != vbo->currval[i].Type ||
  92           memcmp(current, tmp, 4 * sizeof(GLfloat)) != 0) {
  93          memcpy(current, tmp, 4 * sizeof(GLfloat));
  94
  95          vbo->currval[i].Size = node->attrsz[i];
  96          vbo->currval[i]._ElementSize = vbo->currval[i].Size * sizeof(GLfloat);
  97          vbo->currval[i].Type = node->attrtype[i];
  98          vbo->currval[i].Integer =
  99             vbo_attrtype_to_integer_flag(node->attrtype[i]);
 100
 101          if (i >= VBO_ATTRIB_FIRST_MATERIAL &&
 102              i <= VBO_ATTRIB_LAST_MATERIAL)
 103             ctx->NewState |= _NEW_LIGHT;
 104
 105          ctx->NewState |= _NEW_CURRENT_ATTRIB;
 106       }
 107
 108       data += node->attrsz[i];
 109    }
 110
 111    /* Colormaterial -- this kindof sucks.
 112     */
 113    if (ctx->Light.ColorMaterialEnabled) {
 114       _mesa_update_color_material(ctx, ctx->Current.Attrib[VBO_ATTRIB_COLOR0]);
 115    }
 116
 117    /* CurrentExecPrimitive
 118     */
 119    if (node->prim_count) {
 120       const struct _mesa_prim *prim = &node->prims[node->prim_count - 1];
 121       if (prim->end)
 122          ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
 123       else
 124          ctx->Driver.CurrentExecPrimitive = prim->mode;
 125    }
 126 }
 127
 128
 129
 130 /**
 131  * Treat the vertex storage as a VBO, define vertex arrays pointing
 132  * into it:
 133  */
 134 static void
 135 bind_vertex_list(struct gl_context *ctx,
 136                  const struct vbo_save_vertex_list *node)
 137 {
 138    struct vbo_context *vbo = vbo_context(ctx);
 139    struct vbo_save_context *save = &vbo->save;
 140    struct gl_vertex_array *arrays = save->arrays;
 141    GLuint buffer_offset = node->buffer_offset;
 142    const GLuint *map;
 143    GLuint attr;
 144    GLubyte node_attrsz[VBO_ATTRIB_MAX];  /* copy of node->attrsz[] */
 145    GLenum node_attrtype[VBO_ATTRIB_MAX];  /* copy of node->attrtype[] */
 146    GLbitfield varying_inputs = 0x0;
 147
 148    memcpy(node_attrsz, node->attrsz, sizeof(node->attrsz));
 149    memcpy(node_attrtype, node->attrtype, sizeof(node->attrtype));
 150
 151    /* Install the default (ie Current) attributes first, then overlay
 152     * all active ones.
 153     */
 154    switch (get_program_mode(ctx)) {
 155    case VP_NONE:
 156       for (attr = 0; attr < VERT_ATTRIB_FF_MAX; attr++) {
 157          save->inputs[attr] = &vbo->currval[VBO_ATTRIB_POS+attr];
 158       }
 159       for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) {
 160          save->inputs[VERT_ATTRIB_GENERIC(attr)] =
 161             &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT+attr];
 162       }
 163       map = vbo->map_vp_none;
 164       break;
 165    case VP_ARB:
 166       for (attr = 0; attr < VERT_ATTRIB_FF_MAX; attr++) {
 167          save->inputs[attr] = &vbo->currval[VBO_ATTRIB_POS+attr];
 168       }
 169       for (attr = 0; attr < VERT_ATTRIB_GENERIC_MAX; attr++) {
 170          save->inputs[VERT_ATTRIB_GENERIC(attr)] =
 171             &vbo->currval[VBO_ATTRIB_GENERIC0+attr];
 172       }
 173       map = vbo->map_vp_arb;
 174
 175       /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read.
 176        * In that case we effectively need to route the data from
 177        * glVertexAttrib(0, val) calls to feed into the GENERIC0 input.
 178        */
 179       if ((ctx->VertexProgram._Current->info.inputs_read &
 180            VERT_BIT_POS) == 0 &&
 181           (ctx->VertexProgram._Current->info.inputs_read &
 182            VERT_BIT_GENERIC0)) {
 183          save->inputs[VERT_ATTRIB_GENERIC0] = save->inputs[0];
 184          node_attrsz[VERT_ATTRIB_GENERIC0] = node_attrsz[0];
 185          node_attrtype[VERT_ATTRIB_GENERIC0] = node_attrtype[0];
 186          node_attrsz[0] = 0;
 187       }
 188       break;
 189    default:
 190       assert(0);
 191    }
 192
 193    for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
 194       const GLuint src = map[attr];
 195
 196       if (node_attrsz[src]) {
 197          /* override the default array set above */
 198          save->inputs[attr] = &arrays[attr];
 199
 200          arrays[attr].Ptr = (const GLubyte *) NULL + buffer_offset;
 201          arrays[attr].Size = node_attrsz[src];
 202          arrays[attr].StrideB = node->vertex_size * sizeof(GLfloat);
 203          arrays[attr].Type = node_attrtype[src];
 204          arrays[attr].Integer =
 205                vbo_attrtype_to_integer_flag(node_attrtype[src]);
 206          arrays[attr].Format = GL_RGBA;
 207          arrays[attr]._ElementSize = arrays[attr].Size * sizeof(GLfloat);
 208          _mesa_reference_buffer_object(ctx,
 209                                        &arrays[attr].BufferObj,
 210                                        node->vertex_store->bufferobj);
 211
 212          assert(arrays[attr].BufferObj->Name);
 213
 214          buffer_offset += node_attrsz[src] * sizeof(GLfloat);
 215          varying_inputs |= VERT_BIT(attr);
 216       }
 217    }
 218
 219    _mesa_set_varying_vp_inputs(ctx, varying_inputs);
 220    ctx->NewDriverState |= ctx->DriverFlags.NewArray;
 221 }
 222
 223
 224 static void
 225 loopback_vertex_list(struct gl_context *ctx,
 226                      const struct vbo_save_vertex_list *list)
 227 {
 228    const char *buffer =
 229       ctx->Driver.MapBufferRange(ctx, 0,
 230                                  list->vertex_store->bufferobj->Size,
 231                                  GL_MAP_READ_BIT, /* ? */
 232                                  list->vertex_store->bufferobj,
 233                                  MAP_INTERNAL);
 234
 235    vbo_loopback_vertex_list(ctx,
 236                             (const GLfloat *)(buffer + list->buffer_offset),
 237                             list->attrsz,
 238                             list->prims,
 239                             list->prim_count,
 240                             list->wrap_count,
 241                             list->vertex_size);
 242
 243    ctx->Driver.UnmapBuffer(ctx, list->vertex_store->bufferobj,
 244                            MAP_INTERNAL);
 245 }
 246
 247
 248 /**
 249  * Execute the buffer and save copied verts.
 250  * This is called from the display list code when executing
 251  * a drawing command.
 252  */
 253 void
 254 vbo_save_playback_vertex_list(struct gl_context *ctx, void *data)
 255 {
 256    const struct vbo_save_vertex_list *node =
 257       (const struct vbo_save_vertex_list *) data;
 258    struct vbo_save_context *save = &vbo_context(ctx)->save;
 259    GLboolean remap_vertex_store = GL_FALSE;
 260
 261    if (save->vertex_store && save->vertex_store->buffer_map) {
 262       /* The vertex store is currently mapped but we're about to replay
 263        * a display list.  This can happen when a nested display list is
 264        * being build with GL_COMPILE_AND_EXECUTE.
 265        * We never want to have mapped vertex buffers when we're drawing.
 266        * Unmap the vertex store, execute the list, then remap the vertex
 267        * store.
 268        */
 269       vbo_save_unmap_vertex_store(ctx, save->vertex_store);
 270       remap_vertex_store = GL_TRUE;
 271    }
 272
 273    FLUSH_CURRENT(ctx, 0);
 274
 275    if (node->prim_count > 0) {
 276
 277       if (_mesa_inside_begin_end(ctx) && node->prims[0].begin) {
 278          /* Error: we're about to begin a new primitive but we're already
 279           * inside a glBegin/End pair.
 280           */
 281          _mesa_error(ctx, GL_INVALID_OPERATION,
 282                      "draw operation inside glBegin/End");
 283          goto end;
 284       }
 285       else if (save->replay_flags) {
 286          /* Various degenerate cases: translate into immediate mode
 287           * calls rather than trying to execute in place.
 288           */
 289          loopback_vertex_list(ctx, node);
 290
 291          goto end;
 292       }
 293
 294       if (ctx->NewState)
 295          _mesa_update_state(ctx);
 296
 297       /* XXX also need to check if shader enabled, but invalid */
 298       if ((ctx->VertexProgram.Enabled &&
 299            !_mesa_arb_vertex_program_enabled(ctx)) ||
 300           (ctx->FragmentProgram.Enabled &&
 301            !_mesa_arb_fragment_program_enabled(ctx))) {
 302          _mesa_error(ctx, GL_INVALID_OPERATION,
 303                      "glBegin (invalid vertex/fragment program)");
 304          return;
 305       }
 306
 307       bind_vertex_list(ctx, node);
 308
 309       vbo_draw_method(vbo_context(ctx), DRAW_DISPLAY_LIST);
 310
 311       /* Again...
 312        */
 313       if (ctx->NewState)
 314          _mesa_update_state(ctx);
 315
 316       if (node->vertex_count > 0) {
 317          vbo_context(ctx)->draw_prims(ctx,
 318                                       node->prims,
 319                                       node->prim_count,
 320                                       NULL,
 321                                       GL_TRUE,
 322                                       0,    /* Node is a VBO, so this is ok */
 323                                       node->vertex_count - 1,
 324                                       NULL, 0, NULL);
 325       }
 326    }
 327
 328    /* Copy to current?
 329     */
 330    playback_copy_to_current(ctx, node);
 331
 332 end:
 333    if (remap_vertex_store) {
 334       save->buffer_ptr = vbo_save_map_vertex_store(ctx, save->vertex_store);
 335    }
 336 }