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