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 #if FEATURE_dlist
  43
  44
  45 /**
  46  * After playback, copy everything but the position from the
  47  * last vertex to the saved state
  48  */
  49 static void
  50 _playback_copy_to_current(struct gl_context *ctx,
  51                           const struct vbo_save_vertex_list *node)
  52 {
  53    struct vbo_context *vbo = vbo_context(ctx);
  54    GLfloat vertex[VBO_ATTRIB_MAX * 4];
  55    GLfloat *data;
  56    GLuint i, offset;
  57
  58    if (node->current_size == 0)
  59       return;
  60
  61    if (node->current_data) {
  62       data = node->current_data;
  63    }
  64    else {
  65       data = vertex;
  66
  67       if (node->count)
  68          offset = (node->buffer_offset +
  69                    (node->count-1) * node->vertex_size * sizeof(GLfloat));
  70       else
  71          offset = node->buffer_offset;
  72
  73       ctx->Driver.GetBufferSubData( ctx, 0, offset,
  74                                     node->vertex_size * sizeof(GLfloat),
  75                                     data, node->vertex_store->bufferobj );
  76
  77       data += node->attrsz[0]; /* skip vertex position */
  78    }
  79
  80    for (i = VBO_ATTRIB_POS+1 ; i < VBO_ATTRIB_MAX ; i++) {
  81       if (node->attrsz[i]) {
  82          GLfloat *current = (GLfloat *)vbo->currval[i].Ptr;
  83          GLfloat tmp[4];
  84
  85          COPY_CLEAN_4V(tmp,
  86                        node->attrsz[i],
  87                        data);
  88
  89          if (memcmp(current, tmp, 4 * sizeof(GLfloat)) != 0) {
  90             memcpy(current, tmp, 4 * sizeof(GLfloat));
  91
  92             vbo->currval[i].Size = node->attrsz[i];
  93
  94             if (i >= VBO_ATTRIB_FIRST_MATERIAL &&
  95                 i <= VBO_ATTRIB_LAST_MATERIAL)
  96                ctx->NewState |= _NEW_LIGHT;
  97
  98             ctx->NewState |= _NEW_CURRENT_ATTRIB;
  99          }
 100
 101          data += node->attrsz[i];
 102       }
 103    }
 104
 105    /* Colormaterial -- this kindof sucks.
 106     */
 107    if (ctx->Light.ColorMaterialEnabled) {
 108       _mesa_update_color_material(ctx, ctx->Current.Attrib[VBO_ATTRIB_COLOR0]);
 109    }
 110
 111    /* CurrentExecPrimitive
 112     */
 113    if (node->prim_count) {
 114       const struct _mesa_prim *prim = &node->prim[node->prim_count - 1];
 115       if (prim->end)
 116          ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
 117       else
 118          ctx->Driver.CurrentExecPrimitive = prim->mode;
 119    }
 120 }
 121
 122
 123
 124 /**
 125  * Treat the vertex storage as a VBO, define vertex arrays pointing
 126  * into it:
 127  */
 128 static void vbo_bind_vertex_list(struct gl_context *ctx,
 129                                  const struct vbo_save_vertex_list *node)
 130 {
 131    struct vbo_context *vbo = vbo_context(ctx);
 132    struct vbo_save_context *save = &vbo->save;
 133    struct gl_client_array *arrays = save->arrays;
 134    GLuint buffer_offset = node->buffer_offset;
 135    const GLuint *map;
 136    GLuint attr;
 137    GLubyte node_attrsz[VBO_ATTRIB_MAX];  /* copy of node->attrsz[] */
 138    GLbitfield varying_inputs = 0x0;
 139
 140    memcpy(node_attrsz, node->attrsz, sizeof(node->attrsz));
 141
 142    /* Install the default (ie Current) attributes first, then overlay
 143     * all active ones.
 144     */
 145    switch (get_program_mode(ctx)) {
 146    case VP_NONE:
 147       for (attr = 0; attr < 16; attr++) {
 148          save->inputs[attr] = &vbo->legacy_currval[attr];
 149       }
 150       for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) {
 151          save->inputs[attr + 16] = &vbo->mat_currval[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 < 16; attr++) {
 162          save->inputs[attr] = &vbo->legacy_currval[attr];
 163          save->inputs[attr + 16] = &vbo->generic_currval[attr];
 164       }
 165       map = vbo->map_vp_arb;
 166
 167       /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read.
 168        * In that case we effectively need to route the data from
 169        * glVertexAttrib(0, val) calls to feed into the GENERIC0 input.
 170        */
 171       if ((ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_POS) == 0 &&
 172           (ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_GENERIC0)) {
 173          save->inputs[16] = save->inputs[0];
 174          node_attrsz[16] = node_attrsz[0];
 175          node_attrsz[0] = 0;
 176       }
 177       break;
 178    default:
 179       assert(0);
 180    }
 181
 182    for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
 183       const GLuint src = map[attr];
 184
 185       if (node_attrsz[src]) {
 186          /* override the default array set above */
 187          save->inputs[attr] = &arrays[attr];
 188
 189          arrays[attr].Ptr = (const GLubyte *) NULL + buffer_offset;
 190          arrays[attr].Size = node->attrsz[src];
 191          arrays[attr].StrideB = node->vertex_size * sizeof(GLfloat);
 192          arrays[attr].Stride = node->vertex_size * sizeof(GLfloat);
 193          arrays[attr].Type = GL_FLOAT;
 194          arrays[attr].Format = GL_RGBA;
 195          arrays[attr].Enabled = 1;
 196          _mesa_reference_buffer_object(ctx,
 197                                        &arrays[attr].BufferObj,
 198                                        node->vertex_store->bufferobj);
 199          arrays[attr]._MaxElement = node->count; /* ??? */
 200
 201          assert(arrays[attr].BufferObj->Name);
 202
 203          buffer_offset += node->attrsz[src] * sizeof(GLfloat);
 204          varying_inputs |= 1<<attr;
 205       }
 206    }
 207
 208    _mesa_set_varying_vp_inputs( ctx, varying_inputs );
 209 }
 210
 211
 212 static void
 213 vbo_save_loopback_vertex_list(struct gl_context *ctx,
 214                               const struct vbo_save_vertex_list *list)
 215 {
 216    const char *buffer = ctx->Driver.MapBuffer(ctx,
 217                                               GL_ARRAY_BUFFER_ARB,
 218                                               GL_READ_ONLY, /* ? */
 219                                               list->vertex_store->bufferobj);
 220
 221    vbo_loopback_vertex_list(ctx,
 222                             (const GLfloat *)(buffer + list->buffer_offset),
 223                             list->attrsz,
 224                             list->prim,
 225                             list->prim_count,
 226                             list->wrap_count,
 227                             list->vertex_size);
 228
 229    ctx->Driver.UnmapBuffer(ctx, GL_ARRAY_BUFFER_ARB,
 230                            list->vertex_store->bufferobj);
 231 }
 232
 233
 234 /**
 235  * Execute the buffer and save copied verts.
 236  * This is called from the display list code when executing
 237  * a drawing command.
 238  */
 239 void
 240 vbo_save_playback_vertex_list(struct gl_context *ctx, void *data)
 241 {
 242    const struct vbo_save_vertex_list *node =
 243       (const struct vbo_save_vertex_list *) data;
 244    struct vbo_save_context *save = &vbo_context(ctx)->save;
 245
 246    FLUSH_CURRENT(ctx, 0);
 247
 248    if (node->prim_count > 0 && node->count > 0) {
 249
 250       if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END &&
 251           node->prim[0].begin) {
 252
 253          /* Degenerate case: list is called inside begin/end pair and
 254           * includes operations such as glBegin or glDrawArrays.
 255           */
 256          if (0)
 257             printf("displaylist recursive begin");
 258
 259          vbo_save_loopback_vertex_list( ctx, node );
 260          return;
 261       }
 262       else if (save->replay_flags) {
 263          /* Various degnerate cases: translate into immediate mode
 264           * calls rather than trying to execute in place.
 265           */
 266          vbo_save_loopback_vertex_list( ctx, node );
 267          return;
 268       }
 269
 270       if (ctx->NewState)
 271          _mesa_update_state( ctx );
 272
 273       /* XXX also need to check if shader enabled, but invalid */
 274       if ((ctx->VertexProgram.Enabled && !ctx->VertexProgram._Enabled) ||
 275           (ctx->FragmentProgram.Enabled && !ctx->FragmentProgram._Enabled)) {
 276          _mesa_error(ctx, GL_INVALID_OPERATION,
 277                      "glBegin (invalid vertex/fragment program)");
 278          return;
 279       }
 280
 281       vbo_bind_vertex_list( ctx, node );
 282
 283       /* Again...
 284        */
 285       if (ctx->NewState)
 286          _mesa_update_state( ctx );
 287
 288       vbo_context(ctx)->draw_prims(ctx,
 289                                    save->inputs,
 290                                    node->prim,
 291                                    node->prim_count,
 292                                    NULL,
 293                                    GL_TRUE,
 294                                    0,   /* Node is a VBO, so this is ok */
 295                                    node->count - 1);
 296    }
 297
 298    /* Copy to current?
 299     */
 300    _playback_copy_to_current( ctx, node );
 301 }
 302
 303
 304 #endif /* FEATURE_dlist */