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_private.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
  55    if (node->current_size == 0)
  56       return;
  57
  58    if (node->current_data) {
  59       data = node->current_data;
  60    }
  61    else {
  62       /* Position of last vertex */
  63       const GLuint pos = node->vertex_count > 0 ? node->vertex_count - 1 : 0;
  64       /* Offset to last vertex in the vertex buffer */
  65       const GLuint offset = node->buffer_offset
  66          + pos * node->vertex_size * sizeof(GLfloat);
  67
  68       data = vertex;
  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    mask = node->enabled & (~BITFIELD64_BIT(VBO_ATTRIB_POS));
  78    while (mask) {
  79       const int i = u_bit_scan64(&mask);
  80       fi_type *current = (fi_type *)vbo->currval[i].Ptr;
  81       fi_type tmp[4];
  82       assert(node->attrsz[i]);
  83
  84       COPY_CLEAN_4V_TYPE_AS_UNION(tmp,
  85                                   node->attrsz[i],
  86                                   data,
  87                                   node->attrtype[i]);
  88
  89       if (node->attrtype[i] != vbo->currval[i].Type ||
  90           memcmp(current, tmp, 4 * sizeof(GLfloat)) != 0) {
  91          memcpy(current, tmp, 4 * sizeof(GLfloat));
  92
  93          vbo->currval[i].Size = node->attrsz[i];
  94          vbo->currval[i]._ElementSize = vbo->currval[i].Size * sizeof(GLfloat);
  95          vbo->currval[i].Type = node->attrtype[i];
  96          vbo->currval[i].Integer =
  97             vbo_attrtype_to_integer_flag(node->attrtype[i]);
  98
  99          if (i >= VBO_ATTRIB_FIRST_MATERIAL &&
 100              i <= VBO_ATTRIB_LAST_MATERIAL)
 101             ctx->NewState |= _NEW_LIGHT;
 102
 103          ctx->NewState |= _NEW_CURRENT_ATTRIB;
 104       }
 105
 106       data += node->attrsz[i];
 107    }
 108
 109    /* Colormaterial -- this kindof sucks.
 110     */
 111    if (ctx->Light.ColorMaterialEnabled) {
 112       _mesa_update_color_material(ctx, ctx->Current.Attrib[VBO_ATTRIB_COLOR0]);
 113    }
 114
 115    /* CurrentExecPrimitive
 116     */
 117    if (node->prim_count) {
 118       const struct _mesa_prim *prim = &node->prims[node->prim_count - 1];
 119       if (prim->end)
 120          ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
 121       else
 122          ctx->Driver.CurrentExecPrimitive = prim->mode;
 123    }
 124 }
 125
 126
 127
 128 /**
 129  * Treat the vertex storage as a VBO, define vertex arrays pointing
 130  * into it:
 131  */
 132 static void
 133 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_vertex_array *arrays = save->arrays;
 139    GLuint buffer_offset = node->buffer_offset;
 140    const GLubyte *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    GLbitfield varying_inputs = 0x0;
 145
 146    memcpy(node_attrsz, node->attrsz, sizeof(node->attrsz));
 147    memcpy(node_attrtype, node->attrtype, sizeof(node->attrtype));
 148
 149    if (aligned_vertex_buffer_offset(node)) {
 150       /* The vertex size is an exact multiple of the buffer offset.
 151        * This means that we can use zero-based vertex attribute pointers
 152        * and specify the start of the primitive with the _mesa_prim::start
 153        * field.  This results in issuing several draw calls with identical
 154        * vertex attribute information.  This can result in fewer state
 155        * changes in drivers.  In particular, the Gallium CSO module will
 156        * filter out redundant vertex buffer changes.
 157        */
 158       buffer_offset = 0;
 159    }
 160
 161    /* Install the default (ie Current) attributes first */
 162    for (attr = 0; attr < VERT_ATTRIB_FF_MAX; attr++) {
 163       save->inputs[attr] = &vbo->currval[VBO_ATTRIB_POS + attr];
 164    }
 165
 166    /* Overlay other active attributes */
 167    switch (get_program_mode(ctx)) {
 168    case VP_NONE:
 169       for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) {
 170          save->inputs[VERT_ATTRIB_GENERIC(attr)] =
 171             &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT+attr];
 172       }
 173       map = vbo->map_vp_none;
 174       break;
 175    case VP_ARB:
 176       for (attr = 0; attr < VERT_ATTRIB_GENERIC_MAX; attr++) {
 177          save->inputs[VERT_ATTRIB_GENERIC(attr)] =
 178             &vbo->currval[VBO_ATTRIB_GENERIC0+attr];
 179       }
 180       map = vbo->map_vp_arb;
 181
 182       /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read.
 183        * In that case we effectively need to route the data from
 184        * glVertexAttrib(0, val) calls to feed into the GENERIC0 input.
 185        */
 186       const GLbitfield64 inputs_read =
 187          ctx->VertexProgram._Current->info.inputs_read;
 188       if ((inputs_read & VERT_BIT_POS) == 0 &&
 189           (inputs_read & VERT_BIT_GENERIC0)) {
 190          save->inputs[VERT_ATTRIB_GENERIC0] = save->inputs[0];
 191          node_attrsz[VERT_ATTRIB_GENERIC0] = node_attrsz[0];
 192          node_attrtype[VERT_ATTRIB_GENERIC0] = node_attrtype[0];
 193          node_attrsz[0] = 0;
 194       }
 195       break;
 196    default:
 197       unreachable("Bad vertex program mode");
 198    }
 199
 200    for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
 201       const GLuint src = map[attr];
 202
 203       if (node_attrsz[src]) {
 204          struct gl_vertex_array *array = &arrays[attr];
 205
 206          /* override the default array set above */
 207          save->inputs[attr] = array;
 208
 209          array->Ptr = (const GLubyte *) NULL + buffer_offset;
 210          array->Size = node_attrsz[src];
 211          array->StrideB = node->vertex_size * sizeof(GLfloat);
 212          array->Type = node_attrtype[src];
 213          array->Integer = vbo_attrtype_to_integer_flag(node_attrtype[src]);
 214          array->Format = GL_RGBA;
 215          array->_ElementSize = array->Size * sizeof(GLfloat);
 216          _mesa_reference_buffer_object(ctx,
 217                                        &array->BufferObj,
 218                                        node->vertex_store->bufferobj);
 219
 220          assert(array->BufferObj->Name);
 221
 222          buffer_offset += node_attrsz[src] * sizeof(GLfloat);
 223          varying_inputs |= VERT_BIT(attr);
 224       }
 225    }
 226
 227    _mesa_set_varying_vp_inputs(ctx, varying_inputs);
 228    ctx->NewDriverState |= ctx->DriverFlags.NewArray;
 229 }
 230
 231
 232 static void
 233 loopback_vertex_list(struct gl_context *ctx,
 234                      const struct vbo_save_vertex_list *list)
 235 {
 236    const char *buffer =
 237       ctx->Driver.MapBufferRange(ctx, 0,
 238                                  list->vertex_store->bufferobj->Size,
 239                                  GL_MAP_READ_BIT, /* ? */
 240                                  list->vertex_store->bufferobj,
 241                                  MAP_INTERNAL);
 242
 243    unsigned buffer_offset =
 244       aligned_vertex_buffer_offset(list) ? 0 : list->buffer_offset;
 245
 246    vbo_loopback_vertex_list(ctx,
 247                             (const GLfloat *) (buffer + buffer_offset),
 248                             list->attrsz,
 249                             list->prims,
 250                             list->prim_count,
 251                             list->wrap_count,
 252                             list->vertex_size);
 253
 254    ctx->Driver.UnmapBuffer(ctx, list->vertex_store->bufferobj,
 255                            MAP_INTERNAL);
 256 }
 257
 258
 259 /**
 260  * Execute the buffer and save copied verts.
 261  * This is called from the display list code when executing
 262  * a drawing command.
 263  */
 264 void
 265 vbo_save_playback_vertex_list(struct gl_context *ctx, void *data)
 266 {
 267    const struct vbo_save_vertex_list *node =
 268       (const struct vbo_save_vertex_list *) data;
 269    struct vbo_save_context *save = &vbo_context(ctx)->save;
 270    GLboolean remap_vertex_store = GL_FALSE;
 271
 272    if (save->vertex_store && save->vertex_store->buffer_map) {
 273       /* The vertex store is currently mapped but we're about to replay
 274        * a display list.  This can happen when a nested display list is
 275        * being build with GL_COMPILE_AND_EXECUTE.
 276        * We never want to have mapped vertex buffers when we're drawing.
 277        * Unmap the vertex store, execute the list, then remap the vertex
 278        * store.
 279        */
 280       vbo_save_unmap_vertex_store(ctx, save->vertex_store);
 281       remap_vertex_store = GL_TRUE;
 282    }
 283
 284    FLUSH_CURRENT(ctx, 0);
 285
 286    if (node->prim_count > 0) {
 287
 288       if (_mesa_inside_begin_end(ctx) && node->prims[0].begin) {
 289          /* Error: we're about to begin a new primitive but we're already
 290           * inside a glBegin/End pair.
 291           */
 292          _mesa_error(ctx, GL_INVALID_OPERATION,
 293                      "draw operation inside glBegin/End");
 294          goto end;
 295       }
 296       else if (save->replay_flags) {
 297          /* Various degenerate cases: translate into immediate mode
 298           * calls rather than trying to execute in place.
 299           */
 300          loopback_vertex_list(ctx, node);
 301
 302          goto end;
 303       }
 304
 305       if (ctx->NewState)
 306          _mesa_update_state(ctx);
 307
 308       /* XXX also need to check if shader enabled, but invalid */
 309       if ((ctx->VertexProgram.Enabled &&
 310            !_mesa_arb_vertex_program_enabled(ctx)) ||
 311           (ctx->FragmentProgram.Enabled &&
 312            !_mesa_arb_fragment_program_enabled(ctx))) {
 313          _mesa_error(ctx, GL_INVALID_OPERATION,
 314                      "glBegin (invalid vertex/fragment program)");
 315          return;
 316       }
 317
 318       bind_vertex_list(ctx, node);
 319
 320       vbo_draw_method(vbo_context(ctx), DRAW_DISPLAY_LIST);
 321
 322       /* Again...
 323        */
 324       if (ctx->NewState)
 325          _mesa_update_state(ctx);
 326
 327       if (node->vertex_count > 0) {
 328          GLuint min_index = node->start_vertex;
 329          GLuint max_index = min_index + node->vertex_count - 1;
 330          vbo_context(ctx)->draw_prims(ctx,
 331                                       node->prims,
 332                                       node->prim_count,
 333                                       NULL,
 334                                       GL_TRUE,
 335                                       min_index, max_index,
 336                                       NULL, 0, NULL);
 337       }
 338    }
 339
 340    /* Copy to current?
 341     */
 342    playback_copy_to_current(ctx, node);
 343
 344 end:
 345    if (remap_vertex_store) {
 346       save->buffer_ptr = vbo_save_map_vertex_store(ctx, save->vertex_store);
 347    }
 348 }