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(tmp,
  83                        node->attrsz[i],
  84                        data);
  85
  86          if (memcmp(current, tmp, 4 * sizeof(GLfloat)) != 0) {
  87             memcpy(current, tmp, 4 * sizeof(GLfloat));
  88
  89             vbo->currval[i].Size = node->attrsz[i];
  90             assert(vbo->currval[i].Type == GL_FLOAT);
  91             vbo->currval[i]._ElementSize = vbo->currval[i].Size * sizeof(GLfloat);
  92
  93             if (i >= VBO_ATTRIB_FIRST_MATERIAL &&
  94                 i <= VBO_ATTRIB_LAST_MATERIAL)
  95                ctx->NewState |= _NEW_LIGHT;
  96
  97             ctx->NewState |= _NEW_CURRENT_ATTRIB;
  98          }
  99
 100          data += node->attrsz[i];
 101       }
 102    }
 103
 104    /* Colormaterial -- this kindof sucks.
 105     */
 106    if (ctx->Light.ColorMaterialEnabled) {
 107       _mesa_update_color_material(ctx, ctx->Current.Attrib[VBO_ATTRIB_COLOR0]);
 108    }
 109
 110    /* CurrentExecPrimitive
 111     */
 112    if (node->prim_count) {
 113       const struct _mesa_prim *prim = &node->prim[node->prim_count - 1];
 114       if (prim->end)
 115          ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
 116       else
 117          ctx->Driver.CurrentExecPrimitive = prim->mode;
 118    }
 119 }
 120
 121
 122
 123 /**
 124  * Treat the vertex storage as a VBO, define vertex arrays pointing
 125  * into it:
 126  */
 127 static void vbo_bind_vertex_list(struct gl_context *ctx,
 128                                  const struct vbo_save_vertex_list *node)
 129 {
 130    struct vbo_context *vbo = vbo_context(ctx);
 131    struct vbo_save_context *save = &vbo->save;
 132    struct gl_client_array *arrays = save->arrays;
 133    GLuint buffer_offset = node->buffer_offset;
 134    const GLuint *map;
 135    GLuint attr;
 136    GLubyte node_attrsz[VBO_ATTRIB_MAX];  /* copy of node->attrsz[] */
 137    GLbitfield64 varying_inputs = 0x0;
 138
 139    memcpy(node_attrsz, node->attrsz, sizeof(node->attrsz));
 140
 141    /* Install the default (ie Current) attributes first, then overlay
 142     * all active ones.
 143     */
 144    switch (get_program_mode(ctx)) {
 145    case VP_NONE:
 146       for (attr = 0; attr < VERT_ATTRIB_FF_MAX; attr++) {
 147          save->inputs[attr] = &vbo->currval[VBO_ATTRIB_POS+attr];
 148       }
 149       for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) {
 150          save->inputs[VERT_ATTRIB_GENERIC(attr)] =
 151             &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT+attr];
 152       }
 153       map = vbo->map_vp_none;
 154       break;
 155    case VP_NV:
 156    case VP_ARB:
 157       /* The aliasing of attributes for NV vertex programs has already
 158        * occurred.  NV vertex programs cannot access material values,
 159        * nor attributes greater than VERT_ATTRIB_TEX7.
 160        */
 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_attrsz[0] = 0;
 179       }
 180       break;
 181    default:
 182       assert(0);
 183    }
 184
 185    for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
 186       const GLuint src = map[attr];
 187
 188       if (node_attrsz[src]) {
 189          /* override the default array set above */
 190          save->inputs[attr] = &arrays[attr];
 191
 192          arrays[attr].Ptr = (const GLubyte *) NULL + buffer_offset;
 193          arrays[attr].Size = node_attrsz[src];
 194          arrays[attr].StrideB = node->vertex_size * sizeof(GLfloat);
 195          arrays[attr].Stride = node->vertex_size * sizeof(GLfloat);
 196          arrays[attr].Type = GL_FLOAT;
 197          arrays[attr].Format = GL_RGBA;
 198          arrays[attr].Enabled = 1;
 199          arrays[attr]._ElementSize = arrays[attr].Size * sizeof(GLfloat);
 200          _mesa_reference_buffer_object(ctx,
 201                                        &arrays[attr].BufferObj,
 202                                        node->vertex_store->bufferobj);
 203          arrays[attr]._MaxElement = node->count; /* ??? */
 204
 205          assert(arrays[attr].BufferObj->Name);
 206
 207          buffer_offset += node_attrsz[src] * sizeof(GLfloat);
 208          varying_inputs |= VERT_BIT(attr);
 209       }
 210    }
 211
 212    _mesa_set_varying_vp_inputs( ctx, varying_inputs );
 213    ctx->NewDriverState |= ctx->DriverFlags.NewArray;
 214 }
 215
 216
 217 static void
 218 vbo_save_loopback_vertex_list(struct gl_context *ctx,
 219                               const struct vbo_save_vertex_list *list)
 220 {
 221    const char *buffer =
 222       ctx->Driver.MapBufferRange(ctx, 0,
 223                                  list->vertex_store->bufferobj->Size,
 224                                  GL_MAP_READ_BIT, /* ? */
 225                                  list->vertex_store->bufferobj);
 226
 227    vbo_loopback_vertex_list(ctx,
 228                             (const GLfloat *)(buffer + list->buffer_offset),
 229                             list->attrsz,
 230                             list->prim,
 231                             list->prim_count,
 232                             list->wrap_count,
 233                             list->vertex_size);
 234
 235    ctx->Driver.UnmapBuffer(ctx, list->vertex_store->bufferobj);
 236 }
 237
 238
 239 /**
 240  * Execute the buffer and save copied verts.
 241  * This is called from the display list code when executing
 242  * a drawing command.
 243  */
 244 void
 245 vbo_save_playback_vertex_list(struct gl_context *ctx, void *data)
 246 {
 247    const struct vbo_save_vertex_list *node =
 248       (const struct vbo_save_vertex_list *) data;
 249    struct vbo_save_context *save = &vbo_context(ctx)->save;
 250    GLboolean remap_vertex_store = GL_FALSE;
 251
 252    if (save->vertex_store->buffer) {
 253       /* The vertex store is currently mapped but we're about to replay
 254        * a display list.  This can happen when a nested display list is
 255        * being build with GL_COMPILE_AND_EXECUTE.
 256        * We never want to have mapped vertex buffers when we're drawing.
 257        * Unmap the vertex store, execute the list, then remap the vertex
 258        * store.
 259        */
 260       vbo_save_unmap_vertex_store(ctx, save->vertex_store);
 261       remap_vertex_store = GL_TRUE;
 262    }
 263
 264    FLUSH_CURRENT(ctx, 0);
 265
 266    if (node->prim_count > 0) {
 267
 268       if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END &&
 269           node->prim[0].begin) {
 270
 271          /* Degenerate case: list is called inside begin/end pair and
 272           * includes operations such as glBegin or glDrawArrays.
 273           */
 274          if (0)
 275             printf("displaylist recursive begin");
 276
 277          vbo_save_loopback_vertex_list( ctx, node );
 278
 279          goto end;
 280       }
 281       else if (save->replay_flags) {
 282          /* Various degnerate 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);
 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 }