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