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             assert(vbo->currval[i].Type == GL_FLOAT);
  94             vbo->currval[i]._ElementSize = vbo->currval[i].Size * sizeof(GLfloat);
  95
  96             if (i >= VBO_ATTRIB_FIRST_MATERIAL &&
  97                 i <= VBO_ATTRIB_LAST_MATERIAL)
  98                ctx->NewState |= _NEW_LIGHT;
  99
 100             ctx->NewState |= _NEW_CURRENT_ATTRIB;
 101          }
 102
 103          data += node->attrsz[i];
 104       }
 105    }
 106
 107    /* Colormaterial -- this kindof sucks.
 108     */
 109    if (ctx->Light.ColorMaterialEnabled) {
 110       _mesa_update_color_material(ctx, ctx->Current.Attrib[VBO_ATTRIB_COLOR0]);
 111    }
 112
 113    /* CurrentExecPrimitive
 114     */
 115    if (node->prim_count) {
 116       const struct _mesa_prim *prim = &node->prim[node->prim_count - 1];
 117       if (prim->end)
 118          ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
 119       else
 120          ctx->Driver.CurrentExecPrimitive = prim->mode;
 121    }
 122 }
 123
 124
 125
 126 /**
 127  * Treat the vertex storage as a VBO, define vertex arrays pointing
 128  * into it:
 129  */
 130 static void vbo_bind_vertex_list(struct gl_context *ctx,
 131                                  const struct vbo_save_vertex_list *node)
 132 {
 133    struct vbo_context *vbo = vbo_context(ctx);
 134    struct vbo_save_context *save = &vbo->save;
 135    struct gl_client_array *arrays = save->arrays;
 136    GLuint buffer_offset = node->buffer_offset;
 137    const GLuint *map;
 138    GLuint attr;
 139    GLubyte node_attrsz[VBO_ATTRIB_MAX];  /* copy of node->attrsz[] */
 140    GLbitfield varying_inputs = 0x0;
 141
 142    memcpy(node_attrsz, node->attrsz, sizeof(node->attrsz));
 143
 144    /* Install the default (ie Current) attributes first, then overlay
 145     * all active ones.
 146     */
 147    switch (get_program_mode(ctx)) {
 148    case VP_NONE:
 149       for (attr = 0; attr < 16; attr++) {
 150          save->inputs[attr] = &vbo->legacy_currval[attr];
 151       }
 152       for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) {
 153          save->inputs[attr + 16] = &vbo->mat_currval[attr];
 154       }
 155       map = vbo->map_vp_none;
 156       break;
 157    case VP_NV:
 158    case VP_ARB:
 159       /* The aliasing of attributes for NV vertex programs has already
 160        * occurred.  NV vertex programs cannot access material values,
 161        * nor attributes greater than VERT_ATTRIB_TEX7.
 162        */
 163       for (attr = 0; attr < 16; attr++) {
 164          save->inputs[attr] = &vbo->legacy_currval[attr];
 165          save->inputs[attr + 16] = &vbo->generic_currval[attr];
 166       }
 167       map = vbo->map_vp_arb;
 168
 169       /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read.
 170        * In that case we effectively need to route the data from
 171        * glVertexAttrib(0, val) calls to feed into the GENERIC0 input.
 172        */
 173       if ((ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_POS) == 0 &&
 174           (ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_GENERIC0)) {
 175          save->inputs[16] = save->inputs[0];
 176          node_attrsz[16] = node_attrsz[0];
 177          node_attrsz[0] = 0;
 178       }
 179       break;
 180    default:
 181       assert(0);
 182    }
 183
 184    for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
 185       const GLuint src = map[attr];
 186
 187       if (node_attrsz[src]) {
 188          /* override the default array set above */
 189          save->inputs[attr] = &arrays[attr];
 190
 191          arrays[attr].Ptr = (const GLubyte *) NULL + buffer_offset;
 192          arrays[attr].Size = node->attrsz[src];
 193          arrays[attr].StrideB = node->vertex_size * sizeof(GLfloat);
 194          arrays[attr].Stride = node->vertex_size * sizeof(GLfloat);
 195          arrays[attr].Type = GL_FLOAT;
 196          arrays[attr].Format = GL_RGBA;
 197          arrays[attr].Enabled = 1;
 198          arrays[attr]._ElementSize = arrays[attr].Size * sizeof(GLfloat);
 199          _mesa_reference_buffer_object(ctx,
 200                                        &arrays[attr].BufferObj,
 201                                        node->vertex_store->bufferobj);
 202          arrays[attr]._MaxElement = node->count; /* ??? */
 203
 204          assert(arrays[attr].BufferObj->Name);
 205
 206          buffer_offset += node->attrsz[src] * sizeof(GLfloat);
 207          varying_inputs |= 1<<attr;
 208          ctx->NewState |= _NEW_ARRAY;
 209       }
 210    }
 211
 212    _mesa_set_varying_vp_inputs( ctx, varying_inputs );
 213 }
 214
 215
 216 static void
 217 vbo_save_loopback_vertex_list(struct gl_context *ctx,
 218                               const struct vbo_save_vertex_list *list)
 219 {
 220    const char *buffer = ctx->Driver.MapBuffer(ctx,
 221                                               GL_ARRAY_BUFFER_ARB,
 222                                               GL_READ_ONLY, /* ? */
 223                                               list->vertex_store->bufferobj);
 224
 225    vbo_loopback_vertex_list(ctx,
 226                             (const GLfloat *)(buffer + list->buffer_offset),
 227                             list->attrsz,
 228                             list->prim,
 229                             list->prim_count,
 230                             list->wrap_count,
 231                             list->vertex_size);
 232
 233    ctx->Driver.UnmapBuffer(ctx, GL_ARRAY_BUFFER_ARB,
 234                            list->vertex_store->bufferobj);
 235 }
 236
 237
 238 /**
 239  * Execute the buffer and save copied verts.
 240  * This is called from the display list code when executing
 241  * a drawing command.
 242  */
 243 void
 244 vbo_save_playback_vertex_list(struct gl_context *ctx, void *data)
 245 {
 246    const struct vbo_save_vertex_list *node =
 247       (const struct vbo_save_vertex_list *) data;
 248    struct vbo_save_context *save = &vbo_context(ctx)->save;
 249
 250    FLUSH_CURRENT(ctx, 0);
 251
 252    if (node->prim_count > 0) {
 253
 254       if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END &&
 255           node->prim[0].begin) {
 256
 257          /* Degenerate case: list is called inside begin/end pair and
 258           * includes operations such as glBegin or glDrawArrays.
 259           */
 260          if (0)
 261             printf("displaylist recursive begin");
 262
 263          vbo_save_loopback_vertex_list( ctx, node );
 264          return;
 265       }
 266       else if (save->replay_flags) {
 267          /* Various degnerate cases: translate into immediate mode
 268           * calls rather than trying to execute in place.
 269           */
 270          vbo_save_loopback_vertex_list( ctx, node );
 271          return;
 272       }
 273
 274       if (ctx->NewState)
 275          _mesa_update_state( ctx );
 276
 277       /* XXX also need to check if shader enabled, but invalid */
 278       if ((ctx->VertexProgram.Enabled && !ctx->VertexProgram._Enabled) ||
 279           (ctx->FragmentProgram.Enabled && !ctx->FragmentProgram._Enabled)) {
 280          _mesa_error(ctx, GL_INVALID_OPERATION,
 281                      "glBegin (invalid vertex/fragment program)");
 282          return;
 283       }
 284
 285       vbo_bind_vertex_list( ctx, node );
 286
 287       /* Again...
 288        */
 289       if (ctx->NewState)
 290          _mesa_update_state( ctx );
 291
 292       if (node->count > 0) {
 293          vbo_context(ctx)->draw_prims(ctx,
 294                                       save->inputs,
 295                                       node->prim,
 296                                       node->prim_count,
 297                                       NULL,
 298                                       GL_TRUE,
 299                                       0,    /* Node is a VBO, so this is ok */
 300                                       node->count - 1);
 301       }
 302    }
 303
 304    /* Copy to current?
 305     */
 306    _playback_copy_to_current( ctx, node );
 307 }
 308
 309
 310 #endif /* FEATURE_dlist */