src/mesa/vbo/vbo_save_draw.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.2
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /* Author:
  26  *    Keith Whitwell <keith@tungstengraphics.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/mfeatures.h"
  34 #include "main/mtypes.h"
  35 #include "main/macros.h"
  36 #include "main/light.h"
  37 #include "main/state.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    GLfloat vertex[VBO_ATTRIB_MAX * 4];
  52    GLfloat *data;
  53    GLuint i, offset;
  54
  55    if (node->current_size == 0)
  56       return;
  57
  58    if (node->current_data) {
  59       data = node->current_data;
  60    }
  61    else {
  62       data = vertex;
  63
  64       if (node->count)
  65          offset = (node->buffer_offset +
  66                    (node->count-1) * node->vertex_size * sizeof(GLfloat));
  67       else
  68          offset = node->buffer_offset;
  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    for (i = VBO_ATTRIB_POS+1 ; i < VBO_ATTRIB_MAX ; i++) {
  78       if (node->attrsz[i]) {
  79          GLfloat *current = (GLfloat *)vbo->currval[i].Ptr;
  80          GLfloat tmp[4];
  81
  82          COPY_CLEAN_4V_TYPE_AS_FLOAT(tmp,
  83                                      node->attrsz[i],
  84                                      data,
  85                                      node->attrtype[i]);
  86
  87          if (node->attrtype[i] != vbo->currval[i].Type ||
  88              memcmp(current, tmp, 4 * sizeof(GLfloat)) != 0) {
  89             memcpy(current, tmp, 4 * sizeof(GLfloat));
  90
  91             vbo->currval[i].Size = node->attrsz[i];
  92             vbo->currval[i]._ElementSize = vbo->currval[i].Size * sizeof(GLfloat);
  93             vbo->currval[i].Type = node->attrtype[i];
  94             vbo->currval[i].Integer =
  95                   vbo_attrtype_to_integer_flag(node->attrtype[i]);
  96
  97             if (i >= VBO_ATTRIB_FIRST_MATERIAL &&
  98                 i <= VBO_ATTRIB_LAST_MATERIAL)
  99                ctx->NewState |= _NEW_LIGHT;
 100
 101             ctx->NewState |= _NEW_CURRENT_ATTRIB;
 102          }
 103
 104          data += node->attrsz[i];
 105       }
 106    }
 107
 108    /* Colormaterial -- this kindof sucks.
 109     */
 110    if (ctx->Light.ColorMaterialEnabled) {
 111       _mesa_update_color_material(ctx, ctx->Current.Attrib[VBO_ATTRIB_COLOR0]);
 112    }
 113
 114    /* CurrentExecPrimitive
 115     */
 116    if (node->prim_count) {
 117       const struct _mesa_prim *prim = &node->prim[node->prim_count - 1];
 118       if (prim->end)
 119          ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
 120       else
 121          ctx->Driver.CurrentExecPrimitive = prim->mode;
 122    }
 123 }
 124
 125
 126
 127 /**
 128  * Treat the vertex storage as a VBO, define vertex arrays pointing
 129  * into it:
 130  */
 131 static void vbo_bind_vertex_list(struct gl_context *ctx,
 132                                  const struct vbo_save_vertex_list *node)
 133 {
 134    struct vbo_context *vbo = vbo_context(ctx);
 135    struct vbo_save_context *save = &vbo->save;
 136    struct gl_client_array *arrays = save->arrays;
 137    GLuint buffer_offset = node->buffer_offset;
 138    const GLuint *map;
 139    GLuint attr;
 140    GLubyte node_attrsz[VBO_ATTRIB_MAX];  /* copy of node->attrsz[] */
 141    GLenum node_attrtype[VBO_ATTRIB_MAX];  /* copy of node->attrtype[] */
 142    GLbitfield64 varying_inputs = 0x0;
 143
 144    memcpy(node_attrsz, node->attrsz, sizeof(node->attrsz));
 145    memcpy(node_attrtype, node->attrtype, sizeof(node->attrtype));
 146
 147    /* Install the default (ie Current) attributes first, then overlay
 148     * all active ones.
 149     */
 150    switch (get_program_mode(ctx)) {
 151    case VP_NONE:
 152       for (attr = 0; attr < VERT_ATTRIB_FF_MAX; attr++) {
 153          save->inputs[attr] = &vbo->currval[VBO_ATTRIB_POS+attr];
 154       }
 155       for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) {
 156          save->inputs[VERT_ATTRIB_GENERIC(attr)] =
 157             &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT+attr];
 158       }
 159       map = vbo->map_vp_none;
 160       break;
 161    case VP_ARB:
 162       for (attr = 0; attr < VERT_ATTRIB_FF_MAX; attr++) {
 163          save->inputs[attr] = &vbo->currval[VBO_ATTRIB_POS+attr];
 164       }
 165       for (attr = 0; attr < VERT_ATTRIB_GENERIC_MAX; attr++) {
 166          save->inputs[VERT_ATTRIB_GENERIC(attr)] =
 167             &vbo->currval[VBO_ATTRIB_GENERIC0+attr];
 168       }
 169       map = vbo->map_vp_arb;
 170
 171       /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read.
 172        * In that case we effectively need to route the data from
 173        * glVertexAttrib(0, val) calls to feed into the GENERIC0 input.
 174        */
 175       if ((ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_POS) == 0 &&
 176           (ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_GENERIC0)) {
 177          save->inputs[VERT_ATTRIB_GENERIC0] = save->inputs[0];
 178          node_attrsz[VERT_ATTRIB_GENERIC0] = node_attrsz[0];
 179          node_attrtype[VERT_ATTRIB_GENERIC0] = node_attrtype[0];
 180          node_attrsz[0] = 0;
 181       }
 182       break;
 183    default:
 184       assert(0);
 185    }
 186
 187    for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
 188       const GLuint src = map[attr];
 189
 190       if (node_attrsz[src]) {
 191          /* override the default array set above */
 192          save->inputs[attr] = &arrays[attr];
 193
 194          arrays[attr].Ptr = (const GLubyte *) NULL + buffer_offset;
 195          arrays[attr].Size = node_attrsz[src];
 196          arrays[attr].StrideB = node->vertex_size * sizeof(GLfloat);
 197          arrays[attr].Stride = node->vertex_size * sizeof(GLfloat);
 198          arrays[attr].Type = node_attrtype[src];
 199          arrays[attr].Integer =
 200                vbo_attrtype_to_integer_flag(node_attrtype[src]);
 201          arrays[attr].Format = GL_RGBA;
 202          arrays[attr].Enabled = 1;
 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          arrays[attr]._MaxElement = node->count; /* ??? */
 208
 209          assert(arrays[attr].BufferObj->Name);
 210
 211          buffer_offset += node_attrsz[src] * sizeof(GLfloat);
 212          varying_inputs |= VERT_BIT(attr);
 213       }
 214    }
 215
 216    _mesa_set_varying_vp_inputs( ctx, varying_inputs );
 217    ctx->NewDriverState |= ctx->DriverFlags.NewArray;
 218 }
 219
 220
 221 static void
 222 vbo_save_loopback_vertex_list(struct gl_context *ctx,
 223                               const struct vbo_save_vertex_list *list)
 224 {
 225    const char *buffer =
 226       ctx->Driver.MapBufferRange(ctx, 0,
 227                                  list->vertex_store->bufferobj->Size,
 228                                  GL_MAP_READ_BIT, /* ? */
 229                                  list->vertex_store->bufferobj);
 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 }
 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 (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END &&
 273           node->prim[0].begin) {
 274
 275          /* Degenerate case: list is called inside begin/end pair and
 276           * includes operations such as glBegin or glDrawArrays.
 277           */
 278          if (0)
 279             printf("displaylist recursive begin");
 280
 281          vbo_save_loopback_vertex_list( ctx, node );
 282
 283          goto end;
 284       }
 285       else if (save->replay_flags) {
 286          /* Various degnerate cases: translate into immediate mode
 287           * calls rather than trying to execute in place.
 288           */
 289          vbo_save_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 && !ctx->VertexProgram._Enabled) ||
 299           (ctx->FragmentProgram.Enabled && !ctx->FragmentProgram._Enabled)) {
 300          _mesa_error(ctx, GL_INVALID_OPERATION,
 301                      "glBegin (invalid vertex/fragment program)");
 302          return;
 303       }
 304
 305       vbo_bind_vertex_list( ctx, node );
 306
 307       vbo_draw_method(vbo_context(ctx), DRAW_DISPLAY_LIST);
 308
 309       /* Again...
 310        */
 311       if (ctx->NewState)
 312          _mesa_update_state( ctx );
 313
 314       if (node->count > 0) {
 315          vbo_context(ctx)->draw_prims(ctx,
 316                                       node->prim,
 317                                       node->prim_count,
 318                                       NULL,
 319                                       GL_TRUE,
 320                                       0,    /* Node is a VBO, so this is ok */
 321                                       node->count - 1,
 322                                       NULL);
 323       }
 324    }
 325
 326    /* Copy to current?
 327     */
 328    _playback_copy_to_current( ctx, node );
 329
 330 end:
 331    if (remap_vertex_store) {
 332       save->buffer_ptr = vbo_save_map_vertex_store(ctx, save->vertex_store);
 333    }
 334 }