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 <stdbool.h>
  30 #include "main/glheader.h"
  31 #include "main/bufferobj.h"
  32 #include "main/context.h"
  33 #include "main/imports.h"
  34 #include "main/mtypes.h"
  35 #include "main/macros.h"
  36 #include "main/light.h"
  37 #include "main/state.h"
  38 #include "main/varray.h"
  39 #include "util/bitscan.h"
  40
  41 #include "vbo_private.h"
  42
  43
  44 /**
  45  * After playback, copy everything but the position from the
  46  * last vertex to the saved state
  47  */
  48 static void
  49 playback_copy_to_current(struct gl_context *ctx,
  50                          const struct vbo_save_vertex_list *node)
  51 {
  52    struct vbo_context *vbo = vbo_context(ctx);
  53    fi_type vertex[VBO_ATTRIB_MAX * 4];
  54    fi_type *data;
  55    GLbitfield64 mask;
  56
  57    if (node->current_size == 0)
  58       return;
  59
  60    if (node->current_data) {
  61       data = node->current_data;
  62    }
  63    else {
  64       /* Position of last vertex */
  65       const GLuint pos = node->vertex_count > 0 ? node->vertex_count - 1 : 0;
  66       /* Offset to last vertex in the vertex buffer */
  67       const GLuint offset = node->buffer_offset
  68          + pos * node->vertex_size * sizeof(GLfloat);
  69
  70       data = vertex;
  71
  72       ctx->Driver.GetBufferSubData(ctx, offset,
  73                                    node->vertex_size * sizeof(GLfloat),
  74                                    data, node->vertex_store->bufferobj);
  75
  76       data += node->attrsz[0]; /* skip vertex position */
  77    }
  78
  79    mask = node->enabled & (~BITFIELD64_BIT(VBO_ATTRIB_POS));
  80    while (mask) {
  81       const int i = u_bit_scan64(&mask);
  82       fi_type *current = (fi_type *)vbo->currval[i].Ptr;
  83       fi_type tmp[4];
  84       assert(node->attrsz[i]);
  85
  86       COPY_CLEAN_4V_TYPE_AS_UNION(tmp,
  87                                   node->attrsz[i],
  88                                   data,
  89                                   node->attrtype[i]);
  90
  91       if (node->attrtype[i] != vbo->currval[i].Type ||
  92           memcmp(current, tmp, 4 * sizeof(GLfloat)) != 0) {
  93          memcpy(current, tmp, 4 * sizeof(GLfloat));
  94
  95          vbo->currval[i].Size = node->attrsz[i];
  96          vbo->currval[i]._ElementSize = vbo->currval[i].Size * sizeof(GLfloat);
  97          vbo->currval[i].Type = node->attrtype[i];
  98          vbo->currval[i].Integer =
  99             vbo_attrtype_to_integer_flag(node->attrtype[i]);
 100
 101          if (i >= VBO_ATTRIB_FIRST_MATERIAL &&
 102              i <= VBO_ATTRIB_LAST_MATERIAL)
 103             ctx->NewState |= _NEW_LIGHT;
 104
 105          ctx->NewState |= _NEW_CURRENT_ATTRIB;
 106       }
 107
 108       data += node->attrsz[i];
 109    }
 110
 111    /* Colormaterial -- this kindof sucks.
 112     */
 113    if (ctx->Light.ColorMaterialEnabled) {
 114       _mesa_update_color_material(ctx, ctx->Current.Attrib[VBO_ATTRIB_COLOR0]);
 115    }
 116
 117    /* CurrentExecPrimitive
 118     */
 119    if (node->prim_count) {
 120       const struct _mesa_prim *prim = &node->prims[node->prim_count - 1];
 121       if (prim->end)
 122          ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
 123       else
 124          ctx->Driver.CurrentExecPrimitive = prim->mode;
 125    }
 126 }
 127
 128
 129
 130 /**
 131  * Treat the vertex storage as a VBO, define vertex arrays pointing
 132  * into it:
 133  */
 134 static void
 135 bind_vertex_list(struct gl_context *ctx,
 136                  const struct vbo_save_vertex_list *node)
 137 {
 138    struct vbo_context *vbo = vbo_context(ctx);
 139    struct vbo_save_context *save = &vbo->save;
 140    struct gl_vertex_array *arrays = save->arrays;
 141    const GLubyte *map;
 142    GLuint attr;
 143    GLbitfield varying_inputs = 0x0;
 144    bool generic_from_pos = false;
 145
 146    /* Install the default (ie Current) attributes first */
 147    for (attr = 0; attr < VERT_ATTRIB_FF_MAX; attr++) {
 148       save->inputs[attr] = &vbo->currval[VBO_ATTRIB_POS + attr];
 149    }
 150
 151    /* Overlay other active attributes */
 152    switch (get_vp_mode(ctx)) {
 153    case VP_FF:
 154       /* Point the generic attributes at the legacy material values */
 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_SHADER:
 162       for (attr = 0; attr < VERT_ATTRIB_GENERIC_MAX; attr++) {
 163          save->inputs[VERT_ATTRIB_GENERIC(attr)] =
 164             &vbo->currval[VBO_ATTRIB_GENERIC0+attr];
 165       }
 166       map = vbo->map_vp_arb;
 167
 168       /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read.
 169        * In that case we effectively need to route the data from
 170        * glVertexAttrib(0, val) calls to feed into the GENERIC0 input.
 171        */
 172       const GLbitfield64 inputs_read =
 173          ctx->VertexProgram._Current->info.inputs_read;
 174       if ((inputs_read & VERT_BIT_POS) == 0 &&
 175           (inputs_read & VERT_BIT_GENERIC0)) {
 176          generic_from_pos = true;
 177       }
 178       break;
 179    default:
 180       unreachable("Bad vertex program mode");
 181    }
 182
 183    for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
 184       const GLuint src = map[attr];
 185       const GLubyte size = node->attrsz[src];
 186
 187       if (size) {
 188          struct gl_vertex_array *array = &arrays[attr];
 189          const GLenum16 type = node->attrtype[src];
 190
 191          /* override the default array set above */
 192          save->inputs[attr] = array;
 193
 194          array->Ptr = (const GLubyte *) NULL + node->offsets[src];
 195          array->Size = size;
 196          array->StrideB = node->vertex_size * sizeof(GLfloat);
 197          array->Type = type;
 198          array->Integer = vbo_attrtype_to_integer_flag(type);
 199          array->Format = GL_RGBA;
 200          array->_ElementSize = size * sizeof(GLfloat);
 201          _mesa_reference_buffer_object(ctx,
 202                                        &array->BufferObj,
 203                                        node->vertex_store->bufferobj);
 204
 205          assert(array->BufferObj->Name);
 206
 207          varying_inputs |= VERT_BIT(attr);
 208       }
 209    }
 210
 211    if (generic_from_pos) {
 212       varying_inputs |= (varying_inputs & VERT_BIT_POS) << VERT_ATTRIB_GENERIC0;
 213       save->inputs[VERT_ATTRIB_GENERIC0] = save->inputs[VERT_ATTRIB_POS];
 214    }
 215
 216    _mesa_set_varying_vp_inputs(ctx, varying_inputs);
 217    ctx->NewDriverState |= ctx->DriverFlags.NewArray;
 218 }
 219
 220
 221 static void
 222 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                                  MAP_INTERNAL);
 231
 232    unsigned buffer_offset =
 233       aligned_vertex_buffer_offset(list) ? 0 : list->buffer_offset;
 234
 235    vbo_loopback_vertex_list(ctx,
 236                             (const GLfloat *) (buffer + buffer_offset),
 237                             list->attrsz,
 238                             list->prims,
 239                             list->prim_count,
 240                             list->wrap_count,
 241                             list->vertex_size);
 242
 243    ctx->Driver.UnmapBuffer(ctx, list->vertex_store->bufferobj,
 244                            MAP_INTERNAL);
 245 }
 246
 247
 248 /**
 249  * Execute the buffer and save copied verts.
 250  * This is called from the display list code when executing
 251  * a drawing command.
 252  */
 253 void
 254 vbo_save_playback_vertex_list(struct gl_context *ctx, void *data)
 255 {
 256    const struct vbo_save_vertex_list *node =
 257       (const struct vbo_save_vertex_list *) data;
 258    struct vbo_context *vbo = vbo_context(ctx);
 259    struct vbo_save_context *save = &vbo->save;
 260    GLboolean remap_vertex_store = GL_FALSE;
 261
 262    if (save->vertex_store && save->vertex_store->buffer_map) {
 263       /* The vertex store is currently mapped but we're about to replay
 264        * a display list.  This can happen when a nested display list is
 265        * being build with GL_COMPILE_AND_EXECUTE.
 266        * We never want to have mapped vertex buffers when we're drawing.
 267        * Unmap the vertex store, execute the list, then remap the vertex
 268        * store.
 269        */
 270       vbo_save_unmap_vertex_store(ctx, save->vertex_store);
 271       remap_vertex_store = GL_TRUE;
 272    }
 273
 274    FLUSH_CURRENT(ctx, 0);
 275
 276    if (node->prim_count > 0) {
 277
 278       if (_mesa_inside_begin_end(ctx) && node->prims[0].begin) {
 279          /* Error: we're about to begin a new primitive but we're already
 280           * inside a glBegin/End pair.
 281           */
 282          _mesa_error(ctx, GL_INVALID_OPERATION,
 283                      "draw operation inside glBegin/End");
 284          goto end;
 285       }
 286       else if (save->replay_flags) {
 287          /* Various degenerate cases: translate into immediate mode
 288           * calls rather than trying to execute in place.
 289           */
 290          loopback_vertex_list(ctx, node);
 291
 292          goto end;
 293       }
 294
 295       if (ctx->NewState)
 296          _mesa_update_state(ctx);
 297
 298       /* XXX also need to check if shader enabled, but invalid */
 299       if ((ctx->VertexProgram.Enabled &&
 300            !_mesa_arb_vertex_program_enabled(ctx)) ||
 301           (ctx->FragmentProgram.Enabled &&
 302            !_mesa_arb_fragment_program_enabled(ctx))) {
 303          _mesa_error(ctx, GL_INVALID_OPERATION,
 304                      "glBegin (invalid vertex/fragment program)");
 305          return;
 306       }
 307
 308       bind_vertex_list(ctx, node);
 309
 310       _mesa_set_drawing_arrays(ctx, vbo->save.inputs);
 311
 312       /* Again...
 313        */
 314       if (ctx->NewState)
 315          _mesa_update_state(ctx);
 316
 317       if (node->vertex_count > 0) {
 318          GLuint min_index = node->start_vertex;
 319          GLuint max_index = min_index + node->vertex_count - 1;
 320          vbo->draw_prims(ctx,
 321                          node->prims,
 322                          node->prim_count,
 323                          NULL,
 324                          GL_TRUE,
 325                          min_index, max_index,
 326                          NULL, 0, NULL);
 327       }
 328    }
 329
 330    /* Copy to current?
 331     */
 332    playback_copy_to_current(ctx, node);
 333
 334 end:
 335    if (remap_vertex_store) {
 336       save->buffer_ptr = vbo_save_map_vertex_store(ctx, save->vertex_store);
 337    }
 338 }