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/mtypes.h"
  34 #include "main/macros.h"
  35 #include "main/light.h"
  36 #include "main/state.h"
  37
  38 #include "vbo_context.h"
  39
  40
  41 #if FEATURE_dlist
  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    GLfloat vertex[VBO_ATTRIB_MAX * 4];
  54    GLfloat *data;
  55    GLuint i, offset;
  56
  57    if (node->current_size == 0)
  58       return;
  59
  60    if (node->current_data) {
  61       data = node->current_data;
  62    }
  63    else {
  64       data = vertex;
  65
  66       if (node->count)
  67          offset = (node->buffer_offset +
  68                    (node->count-1) * node->vertex_size * sizeof(GLfloat));
  69       else
  70          offset = node->buffer_offset;
  71
  72       ctx->Driver.GetBufferSubData( ctx, 0, 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    for (i = VBO_ATTRIB_POS+1 ; i < VBO_ATTRIB_MAX ; i++) {
  80       if (node->attrsz[i]) {
  81          GLfloat *current = (GLfloat *)vbo->currval[i].Ptr;
  82          GLfloat tmp[4];
  83
  84          COPY_CLEAN_4V(tmp,
  85                        node->attrsz[i],
  86                        data);
  87
  88          if (memcmp(current, tmp, 4 * sizeof(GLfloat)) != 0) {
  89             memcpy(current, tmp, 4 * sizeof(GLfloat));
  90
  91             vbo->currval[i].Size = node->attrsz[i];
  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    GLbitfield 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 < 16; attr++) {
 147          save->inputs[attr] = &vbo->legacy_currval[attr];
 148       }
 149       for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) {
 150          save->inputs[attr + 16] = &vbo->mat_currval[attr];
 151       }
 152       map = vbo->map_vp_none;
 153       break;
 154    case VP_NV:
 155    case VP_ARB:
 156       /* The aliasing of attributes for NV vertex programs has already
 157        * occurred.  NV vertex programs cannot access material values,
 158        * nor attributes greater than VERT_ATTRIB_TEX7.
 159        */
 160       for (attr = 0; attr < 16; attr++) {
 161          save->inputs[attr] = &vbo->legacy_currval[attr];
 162          save->inputs[attr + 16] = &vbo->generic_currval[attr];
 163       }
 164       map = vbo->map_vp_arb;
 165
 166       /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read.
 167        * In that case we effectively need to route the data from
 168        * glVertexAttrib(0, val) calls to feed into the GENERIC0 input.
 169        */
 170       if ((ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_POS) == 0 &&
 171           (ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_GENERIC0)) {
 172          save->inputs[16] = save->inputs[0];
 173          node_attrsz[16] = node_attrsz[0];
 174          node_attrsz[0] = 0;
 175       }
 176       break;
 177    default:
 178       assert(0);
 179    }
 180
 181    for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
 182       const GLuint src = map[attr];
 183
 184       if (node_attrsz[src]) {
 185          /* override the default array set above */
 186          save->inputs[attr] = &arrays[attr];
 187
 188          arrays[attr].Ptr = (const GLubyte *) NULL + buffer_offset;
 189          arrays[attr].Size = node->attrsz[src];
 190          arrays[attr].StrideB = node->vertex_size * sizeof(GLfloat);
 191          arrays[attr].Stride = node->vertex_size * sizeof(GLfloat);
 192          arrays[attr].Type = GL_FLOAT;
 193          arrays[attr].Format = GL_RGBA;
 194          arrays[attr].Enabled = 1;
 195          _mesa_reference_buffer_object(ctx,
 196                                        &arrays[attr].BufferObj,
 197                                        node->vertex_store->bufferobj);
 198          arrays[attr]._MaxElement = node->count; /* ??? */
 199
 200          assert(arrays[attr].BufferObj->Name);
 201
 202          buffer_offset += node->attrsz[src] * sizeof(GLfloat);
 203          varying_inputs |= 1<<attr;
 204       }
 205    }
 206
 207    _mesa_set_varying_vp_inputs( ctx, varying_inputs );
 208 }
 209
 210
 211 static void
 212 vbo_save_loopback_vertex_list(struct gl_context *ctx,
 213                               const struct vbo_save_vertex_list *list)
 214 {
 215    const char *buffer = ctx->Driver.MapBuffer(ctx,
 216                                               GL_ARRAY_BUFFER_ARB,
 217                                               GL_READ_ONLY, /* ? */
 218                                               list->vertex_store->bufferobj);
 219
 220    vbo_loopback_vertex_list(ctx,
 221                             (const GLfloat *)(buffer + list->buffer_offset),
 222                             list->attrsz,
 223                             list->prim,
 224                             list->prim_count,
 225                             list->wrap_count,
 226                             list->vertex_size);
 227
 228    ctx->Driver.UnmapBuffer(ctx, GL_ARRAY_BUFFER_ARB,
 229                            list->vertex_store->bufferobj);
 230 }
 231
 232
 233 /**
 234  * Execute the buffer and save copied verts.
 235  * This is called from the display list code when executing
 236  * a drawing command.
 237  */
 238 void
 239 vbo_save_playback_vertex_list(struct gl_context *ctx, void *data)
 240 {
 241    const struct vbo_save_vertex_list *node =
 242       (const struct vbo_save_vertex_list *) data;
 243    struct vbo_save_context *save = &vbo_context(ctx)->save;
 244
 245    FLUSH_CURRENT(ctx, 0);
 246
 247    if (node->prim_count > 0 && node->count > 0) {
 248
 249       if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END &&
 250           node->prim[0].begin) {
 251
 252          /* Degenerate case: list is called inside begin/end pair and
 253           * includes operations such as glBegin or glDrawArrays.
 254           */
 255          if (0)
 256             printf("displaylist recursive begin");
 257
 258          vbo_save_loopback_vertex_list( ctx, node );
 259          return;
 260       }
 261       else if (save->replay_flags) {
 262          /* Various degnerate cases: translate into immediate mode
 263           * calls rather than trying to execute in place.
 264           */
 265          vbo_save_loopback_vertex_list( ctx, node );
 266          return;
 267       }
 268
 269       if (ctx->NewState)
 270          _mesa_update_state( ctx );
 271
 272       /* XXX also need to check if shader enabled, but invalid */
 273       if ((ctx->VertexProgram.Enabled && !ctx->VertexProgram._Enabled) ||
 274           (ctx->FragmentProgram.Enabled && !ctx->FragmentProgram._Enabled)) {
 275          _mesa_error(ctx, GL_INVALID_OPERATION,
 276                      "glBegin (invalid vertex/fragment program)");
 277          return;
 278       }
 279
 280       vbo_bind_vertex_list( ctx, node );
 281
 282       /* Again...
 283        */
 284       if (ctx->NewState)
 285          _mesa_update_state( ctx );
 286
 287       vbo_context(ctx)->draw_prims(ctx,
 288                                    save->inputs,
 289                                    node->prim,
 290                                    node->prim_count,
 291                                    NULL,
 292                                    GL_TRUE,
 293                                    0,   /* Node is a VBO, so this is ok */
 294                                    node->count - 1);
 295    }
 296
 297    /* Copy to current?
 298     */
 299    _playback_copy_to_current( ctx, node );
 300 }
 301
 302
 303 #endif /* FEATURE_dlist */