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_private.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
  55    if (node->current_size == 0)
  56       return;
  57
  58    if (node->current_data) {
  59       data = node->current_data;
  60    }
  61    else {
  62       /* Position of last vertex */
  63       const GLuint pos = node->vertex_count > 0 ? node->vertex_count - 1 : 0;
  64       /* Offset to last vertex in the vertex buffer */
  65       const GLuint offset = node->buffer_offset
  66          + pos * node->vertex_size * sizeof(GLfloat);
  67
  68       data = vertex;
  69
  70       ctx->Driver.GetBufferSubData(ctx, offset,
  71                                    node->vertex_size * sizeof(GLfloat),
  72                                    data, node->vertex_store->bufferobj);
  73
  74       data += node->attrsz[0]; /* skip vertex position */
  75    }
  76
  77    mask = node->enabled & (~BITFIELD64_BIT(VBO_ATTRIB_POS));
  78    while (mask) {
  79       const int i = u_bit_scan64(&mask);
  80       fi_type *current = (fi_type *)vbo->currval[i].Ptr;
  81       fi_type tmp[4];
  82       assert(node->attrsz[i]);
  83
  84       COPY_CLEAN_4V_TYPE_AS_UNION(tmp,
  85                                   node->attrsz[i],
  86                                   data,
  87                                   node->attrtype[i]);
  88
  89       if (node->attrtype[i] != vbo->currval[i].Type ||
  90           memcmp(current, tmp, 4 * sizeof(GLfloat)) != 0) {
  91          memcpy(current, tmp, 4 * sizeof(GLfloat));
  92
  93          vbo->currval[i].Size = node->attrsz[i];
  94          vbo->currval[i]._ElementSize = vbo->currval[i].Size * sizeof(GLfloat);
  95          vbo->currval[i].Type = node->attrtype[i];
  96          vbo->currval[i].Integer =
  97             vbo_attrtype_to_integer_flag(node->attrtype[i]);
  98
  99          if (i >= VBO_ATTRIB_FIRST_MATERIAL &&
 100              i <= VBO_ATTRIB_LAST_MATERIAL)
 101             ctx->NewState |= _NEW_LIGHT;
 102
 103          ctx->NewState |= _NEW_CURRENT_ATTRIB;
 104       }
 105
 106       data += node->attrsz[i];
 107    }
 108
 109    /* Colormaterial -- this kindof sucks.
 110     */
 111    if (ctx->Light.ColorMaterialEnabled) {
 112       _mesa_update_color_material(ctx, ctx->Current.Attrib[VBO_ATTRIB_COLOR0]);
 113    }
 114
 115    /* CurrentExecPrimitive
 116     */
 117    if (node->prim_count) {
 118       const struct _mesa_prim *prim = &node->prims[node->prim_count - 1];
 119       if (prim->end)
 120          ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
 121       else
 122          ctx->Driver.CurrentExecPrimitive = prim->mode;
 123    }
 124 }
 125
 126
 127
 128 /**
 129  * Treat the vertex storage as a VBO, define vertex arrays pointing
 130  * into it:
 131  */
 132 static void
 133 bind_vertex_list(struct gl_context *ctx,
 134                  const struct vbo_save_vertex_list *node)
 135 {
 136    struct vbo_context *vbo = vbo_context(ctx);
 137    struct vbo_save_context *save = &vbo->save;
 138    struct gl_vertex_array *arrays = save->arrays;
 139    GLuint buffer_offset = node->buffer_offset;
 140    const GLubyte *map;
 141    GLuint attr;
 142    GLubyte node_attrsz[VBO_ATTRIB_MAX];  /* copy of node->attrsz[] */
 143    GLenum node_attrtype[VBO_ATTRIB_MAX];  /* copy of node->attrtype[] */
 144    GLbitfield varying_inputs = 0x0;
 145
 146    memcpy(node_attrsz, node->attrsz, sizeof(node->attrsz));
 147    memcpy(node_attrtype, node->attrtype, sizeof(node->attrtype));
 148
 149    if (aligned_vertex_buffer_offset(node)) {
 150       /* The vertex size is an exact multiple of the buffer offset.
 151        * This means that we can use zero-based vertex attribute pointers
 152        * and specify the start of the primitive with the _mesa_prim::start
 153        * field.  This results in issuing several draw calls with identical
 154        * vertex attribute information.  This can result in fewer state
 155        * changes in drivers.  In particular, the Gallium CSO module will
 156        * filter out redundant vertex buffer changes.
 157        */
 158       buffer_offset = 0;
 159    }
 160
 161    /* Install the default (ie Current) attributes first */
 162    for (attr = 0; attr < VERT_ATTRIB_FF_MAX; attr++) {
 163       save->inputs[attr] = &vbo->currval[VBO_ATTRIB_POS + attr];
 164    }
 165
 166    /* Overlay other active attributes */
 167    switch (get_vp_mode(ctx)) {
 168    case VP_FF:
 169       /* Point the generic attributes at the legacy material values */
 170       for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) {
 171          save->inputs[VERT_ATTRIB_GENERIC(attr)] =
 172             &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT+attr];
 173       }
 174       map = vbo->map_vp_none;
 175       break;
 176    case VP_SHADER:
 177       for (attr = 0; attr < VERT_ATTRIB_GENERIC_MAX; attr++) {
 178          save->inputs[VERT_ATTRIB_GENERIC(attr)] =
 179             &vbo->currval[VBO_ATTRIB_GENERIC0+attr];
 180       }
 181       map = vbo->map_vp_arb;
 182
 183       /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read.
 184        * In that case we effectively need to route the data from
 185        * glVertexAttrib(0, val) calls to feed into the GENERIC0 input.
 186        */
 187       const GLbitfield64 inputs_read =
 188          ctx->VertexProgram._Current->info.inputs_read;
 189       if ((inputs_read & VERT_BIT_POS) == 0 &&
 190           (inputs_read & VERT_BIT_GENERIC0)) {
 191          save->inputs[VERT_ATTRIB_GENERIC0] = save->inputs[0];
 192          node_attrsz[VERT_ATTRIB_GENERIC0] = node_attrsz[0];
 193          node_attrtype[VERT_ATTRIB_GENERIC0] = node_attrtype[0];
 194          node_attrsz[0] = 0;
 195       }
 196       break;
 197    default:
 198       unreachable("Bad vertex program mode");
 199    }
 200
 201    for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
 202       const GLuint src = map[attr];
 203
 204       if (node_attrsz[src]) {
 205          struct gl_vertex_array *array = &arrays[attr];
 206
 207          /* override the default array set above */
 208          save->inputs[attr] = array;
 209
 210          array->Ptr = (const GLubyte *) NULL + buffer_offset;
 211          array->Size = node_attrsz[src];
 212          array->StrideB = node->vertex_size * sizeof(GLfloat);
 213          array->Type = node_attrtype[src];
 214          array->Integer = vbo_attrtype_to_integer_flag(node_attrtype[src]);
 215          array->Format = GL_RGBA;
 216          array->_ElementSize = array->Size * sizeof(GLfloat);
 217          _mesa_reference_buffer_object(ctx,
 218                                        &array->BufferObj,
 219                                        node->vertex_store->bufferobj);
 220
 221          assert(array->BufferObj->Name);
 222
 223          buffer_offset += node_attrsz[src] * sizeof(GLfloat);
 224          varying_inputs |= VERT_BIT(attr);
 225       }
 226    }
 227
 228    _mesa_set_varying_vp_inputs(ctx, varying_inputs);
 229    ctx->NewDriverState |= ctx->DriverFlags.NewArray;
 230 }
 231
 232
 233 static void
 234 loopback_vertex_list(struct gl_context *ctx,
 235                      const struct vbo_save_vertex_list *list)
 236 {
 237    const char *buffer =
 238       ctx->Driver.MapBufferRange(ctx, 0,
 239                                  list->vertex_store->bufferobj->Size,
 240                                  GL_MAP_READ_BIT, /* ? */
 241                                  list->vertex_store->bufferobj,
 242                                  MAP_INTERNAL);
 243
 244    unsigned buffer_offset =
 245       aligned_vertex_buffer_offset(list) ? 0 : list->buffer_offset;
 246
 247    vbo_loopback_vertex_list(ctx,
 248                             (const GLfloat *) (buffer + buffer_offset),
 249                             list->attrsz,
 250                             list->prims,
 251                             list->prim_count,
 252                             list->wrap_count,
 253                             list->vertex_size);
 254
 255    ctx->Driver.UnmapBuffer(ctx, list->vertex_store->bufferobj,
 256                            MAP_INTERNAL);
 257 }
 258
 259
 260 /**
 261  * Execute the buffer and save copied verts.
 262  * This is called from the display list code when executing
 263  * a drawing command.
 264  */
 265 void
 266 vbo_save_playback_vertex_list(struct gl_context *ctx, void *data)
 267 {
 268    const struct vbo_save_vertex_list *node =
 269       (const struct vbo_save_vertex_list *) data;
 270    struct vbo_save_context *save = &vbo_context(ctx)->save;
 271    GLboolean remap_vertex_store = GL_FALSE;
 272
 273    if (save->vertex_store && save->vertex_store->buffer_map) {
 274       /* The vertex store is currently mapped but we're about to replay
 275        * a display list.  This can happen when a nested display list is
 276        * being build with GL_COMPILE_AND_EXECUTE.
 277        * We never want to have mapped vertex buffers when we're drawing.
 278        * Unmap the vertex store, execute the list, then remap the vertex
 279        * store.
 280        */
 281       vbo_save_unmap_vertex_store(ctx, save->vertex_store);
 282       remap_vertex_store = GL_TRUE;
 283    }
 284
 285    FLUSH_CURRENT(ctx, 0);
 286
 287    if (node->prim_count > 0) {
 288
 289       if (_mesa_inside_begin_end(ctx) && node->prims[0].begin) {
 290          /* Error: we're about to begin a new primitive but we're already
 291           * inside a glBegin/End pair.
 292           */
 293          _mesa_error(ctx, GL_INVALID_OPERATION,
 294                      "draw operation inside glBegin/End");
 295          goto end;
 296       }
 297       else if (save->replay_flags) {
 298          /* Various degenerate cases: translate into immediate mode
 299           * calls rather than trying to execute in place.
 300           */
 301          loopback_vertex_list(ctx, node);
 302
 303          goto end;
 304       }
 305
 306       if (ctx->NewState)
 307          _mesa_update_state(ctx);
 308
 309       /* XXX also need to check if shader enabled, but invalid */
 310       if ((ctx->VertexProgram.Enabled &&
 311            !_mesa_arb_vertex_program_enabled(ctx)) ||
 312           (ctx->FragmentProgram.Enabled &&
 313            !_mesa_arb_fragment_program_enabled(ctx))) {
 314          _mesa_error(ctx, GL_INVALID_OPERATION,
 315                      "glBegin (invalid vertex/fragment program)");
 316          return;
 317       }
 318
 319       bind_vertex_list(ctx, node);
 320
 321       vbo_draw_method(vbo_context(ctx), DRAW_DISPLAY_LIST);
 322
 323       /* Again...
 324        */
 325       if (ctx->NewState)
 326          _mesa_update_state(ctx);
 327
 328       if (node->vertex_count > 0) {
 329          GLuint min_index = node->start_vertex;
 330          GLuint max_index = min_index + node->vertex_count - 1;
 331          vbo_context(ctx)->draw_prims(ctx,
 332                                       node->prims,
 333                                       node->prim_count,
 334                                       NULL,
 335                                       GL_TRUE,
 336                                       min_index, max_index,
 337                                       NULL, 0, NULL);
 338       }
 339    }
 340
 341    /* Copy to current?
 342     */
 343    playback_copy_to_current(ctx, node);
 344
 345 end:
 346    if (remap_vertex_store) {
 347       save->buffer_ptr = vbo_save_map_vertex_store(ctx, save->vertex_store);
 348    }
 349 }