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
 134 vbo_bind_vertex_list(struct gl_context *ctx,
 135                      const struct vbo_save_vertex_list *node)
 136 {
 137    struct vbo_context *vbo = vbo_context(ctx);
 138    struct vbo_save_context *save = &vbo->save;
 139    struct gl_vertex_array *arrays = save->arrays;
 140    GLuint buffer_offset = node->buffer_offset;
 141    const GLuint *map;
 142    GLuint attr;
 143    GLubyte node_attrsz[VBO_ATTRIB_MAX];  /* copy of node->attrsz[] */
 144    GLenum node_attrtype[VBO_ATTRIB_MAX];  /* copy of node->attrtype[] */
 145    GLbitfield varying_inputs = 0x0;
 146
 147    memcpy(node_attrsz, node->attrsz, sizeof(node->attrsz));
 148    memcpy(node_attrtype, node->attrtype, sizeof(node->attrtype));
 149
 150    /* Install the default (ie Current) attributes first, then overlay
 151     * all active ones.
 152     */
 153    switch (get_program_mode(ctx)) {
 154    case VP_NONE:
 155       for (attr = 0; attr < VERT_ATTRIB_FF_MAX; attr++) {
 156          save->inputs[attr] = &vbo->currval[VBO_ATTRIB_POS+attr];
 157       }
 158       for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) {
 159          save->inputs[VERT_ATTRIB_GENERIC(attr)] =
 160             &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT+attr];
 161       }
 162       map = vbo->map_vp_none;
 163       break;
 164    case VP_ARB:
 165       for (attr = 0; attr < VERT_ATTRIB_FF_MAX; attr++) {
 166          save->inputs[attr] = &vbo->currval[VBO_ATTRIB_POS+attr];
 167       }
 168       for (attr = 0; attr < VERT_ATTRIB_GENERIC_MAX; attr++) {
 169          save->inputs[VERT_ATTRIB_GENERIC(attr)] =
 170             &vbo->currval[VBO_ATTRIB_GENERIC0+attr];
 171       }
 172       map = vbo->map_vp_arb;
 173
 174       /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read.
 175        * In that case we effectively need to route the data from
 176        * glVertexAttrib(0, val) calls to feed into the GENERIC0 input.
 177        */
 178       if ((ctx->VertexProgram._Current->info.inputs_read &
 179            VERT_BIT_POS) == 0 &&
 180           (ctx->VertexProgram._Current->info.inputs_read &
 181            VERT_BIT_GENERIC0)) {
 182          save->inputs[VERT_ATTRIB_GENERIC0] = save->inputs[0];
 183          node_attrsz[VERT_ATTRIB_GENERIC0] = node_attrsz[0];
 184          node_attrtype[VERT_ATTRIB_GENERIC0] = node_attrtype[0];
 185          node_attrsz[0] = 0;
 186       }
 187       break;
 188    default:
 189       assert(0);
 190    }
 191
 192    for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
 193       const GLuint src = map[attr];
 194
 195       if (node_attrsz[src]) {
 196          /* override the default array set above */
 197          save->inputs[attr] = &arrays[attr];
 198
 199          arrays[attr].Ptr = (const GLubyte *) NULL + buffer_offset;
 200          arrays[attr].Size = node_attrsz[src];
 201          arrays[attr].StrideB = node->vertex_size * sizeof(GLfloat);
 202          arrays[attr].Type = node_attrtype[src];
 203          arrays[attr].Integer =
 204                vbo_attrtype_to_integer_flag(node_attrtype[src]);
 205          arrays[attr].Format = GL_RGBA;
 206          arrays[attr]._ElementSize = arrays[attr].Size * sizeof(GLfloat);
 207          _mesa_reference_buffer_object(ctx,
 208                                        &arrays[attr].BufferObj,
 209                                        node->vertex_store->bufferobj);
 210
 211          assert(arrays[attr].BufferObj->Name);
 212
 213          buffer_offset += node_attrsz[src] * sizeof(GLfloat);
 214          varying_inputs |= VERT_BIT(attr);
 215       }
 216    }
 217
 218    _mesa_set_varying_vp_inputs(ctx, varying_inputs);
 219    ctx->NewDriverState |= ctx->DriverFlags.NewArray;
 220 }
 221
 222
 223 static void
 224 vbo_save_loopback_vertex_list(struct gl_context *ctx,
 225                               const struct vbo_save_vertex_list *list)
 226 {
 227    const char *buffer =
 228       ctx->Driver.MapBufferRange(ctx, 0,
 229                                  list->vertex_store->bufferobj->Size,
 230                                  GL_MAP_READ_BIT, /* ? */
 231                                  list->vertex_store->bufferobj,
 232                                  MAP_INTERNAL);
 233
 234    vbo_loopback_vertex_list(ctx,
 235                             (const GLfloat *)(buffer + list->buffer_offset),
 236                             list->attrsz,
 237                             list->prim,
 238                             list->prim_count,
 239                             list->wrap_count,
 240                             list->vertex_size);
 241
 242    ctx->Driver.UnmapBuffer(ctx, list->vertex_store->bufferobj,
 243                            MAP_INTERNAL);
 244 }
 245
 246
 247 /**
 248  * Execute the buffer and save copied verts.
 249  * This is called from the display list code when executing
 250  * a drawing command.
 251  */
 252 void
 253 vbo_save_playback_vertex_list(struct gl_context *ctx, void *data)
 254 {
 255    const struct vbo_save_vertex_list *node =
 256       (const struct vbo_save_vertex_list *) data;
 257    struct vbo_save_context *save = &vbo_context(ctx)->save;
 258    GLboolean remap_vertex_store = GL_FALSE;
 259
 260    if (save->vertex_store && save->vertex_store->buffer) {
 261       /* The vertex store is currently mapped but we're about to replay
 262        * a display list.  This can happen when a nested display list is
 263        * being build with GL_COMPILE_AND_EXECUTE.
 264        * We never want to have mapped vertex buffers when we're drawing.
 265        * Unmap the vertex store, execute the list, then remap the vertex
 266        * store.
 267        */
 268       vbo_save_unmap_vertex_store(ctx, save->vertex_store);
 269       remap_vertex_store = GL_TRUE;
 270    }
 271
 272    FLUSH_CURRENT(ctx, 0);
 273
 274    if (node->prim_count > 0) {
 275
 276       if (_mesa_inside_begin_end(ctx) && node->prim[0].begin) {
 277          /* Error: we're about to begin a new primitive but we're already
 278           * inside a glBegin/End pair.
 279           */
 280          _mesa_error(ctx, GL_INVALID_OPERATION,
 281                      "draw operation inside glBegin/End");
 282          goto end;
 283       }
 284       else if (save->replay_flags) {
 285          /* Various degenerate cases: translate into immediate mode
 286           * calls rather than trying to execute in place.
 287           */
 288          vbo_save_loopback_vertex_list(ctx, node);
 289
 290          goto end;
 291       }
 292
 293       if (ctx->NewState)
 294          _mesa_update_state(ctx);
 295
 296       /* XXX also need to check if shader enabled, but invalid */
 297       if ((ctx->VertexProgram.Enabled &&
 298            !_mesa_arb_vertex_program_enabled(ctx)) ||
 299           (ctx->FragmentProgram.Enabled &&
 300            !_mesa_arb_fragment_program_enabled(ctx))) {
 301          _mesa_error(ctx, GL_INVALID_OPERATION,
 302                      "glBegin (invalid vertex/fragment program)");
 303          return;
 304       }
 305
 306       vbo_bind_vertex_list(ctx, node);
 307
 308       vbo_draw_method(vbo_context(ctx), DRAW_DISPLAY_LIST);
 309
 310       /* Again...
 311        */
 312       if (ctx->NewState)
 313          _mesa_update_state(ctx);
 314
 315       if (node->count > 0) {
 316          vbo_context(ctx)->draw_prims(ctx,
 317                                       node->prim,
 318                                       node->prim_count,
 319                                       NULL,
 320                                       GL_TRUE,
 321                                       0,    /* Node is a VBO, so this is ok */
 322                                       node->count - 1,
 323                                       NULL, 0, NULL);
 324       }
 325    }
 326
 327    /* Copy to current?
 328     */
 329    _playback_copy_to_current(ctx, node);
 330
 331 end:
 332    if (remap_vertex_store) {
 333       save->buffer_ptr = vbo_save_map_vertex_store(ctx, save->vertex_store);
 334    }
 335 }