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 _playback_copy_to_current( GLcontext *ctx,
  49                                        const struct vbo_save_vertex_list *node )
  50 {
  51    struct vbo_context *vbo = vbo_context(ctx);
  52    GLfloat vertex[VBO_ATTRIB_MAX * 4];
  53    GLfloat *data;
  54    GLuint i, offset;
  55
  56    if (node->current_size == 0)
  57       return;
  58
  59    if (node->current_data) {
  60       data = node->current_data;
  61    }
  62    else {
  63       data = vertex;
  64
  65       if (node->count)
  66          offset = (node->buffer_offset +
  67                    (node->count-1) * node->vertex_size * sizeof(GLfloat));
  68       else
  69          offset = node->buffer_offset;
  70
  71       ctx->Driver.GetBufferSubData( ctx, 0, offset,
  72                                     node->vertex_size * sizeof(GLfloat),
  73                                     data, node->vertex_store->bufferobj );
  74
  75       data += node->attrsz[0]; /* skip vertex position */
  76    }
  77
  78    for (i = VBO_ATTRIB_POS+1 ; i < VBO_ATTRIB_MAX ; i++) {
  79       if (node->attrsz[i]) {
  80          GLfloat *current = (GLfloat *)vbo->currval[i].Ptr;
  81          GLfloat tmp[4];
  82
  83          COPY_CLEAN_4V(tmp,
  84                        node->attrsz[i],
  85                        data);
  86
  87          if (memcmp(current, tmp, 4 * sizeof(GLfloat)) != 0)
  88          {
  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 /* Treat the vertex storage as a VBO, define vertex arrays pointing
 124  * into it:
 125  */
 126 static void vbo_bind_vertex_list( GLcontext *ctx,
 127                                    const struct vbo_save_vertex_list *node )
 128 {
 129    struct vbo_context *vbo = vbo_context(ctx);
 130    struct vbo_save_context *save = &vbo->save;
 131    struct gl_client_array *arrays = save->arrays;
 132    GLuint buffer_offset = node->buffer_offset;
 133    const GLuint *map;
 134    GLuint attr;
 135    GLubyte node_attrsz[VBO_ATTRIB_MAX];  /* copy of node->attrsz[] */
 136    GLbitfield varying_inputs = 0x0;
 137
 138    memcpy(node_attrsz, node->attrsz, sizeof(node->attrsz));
 139
 140    /* Install the default (ie Current) attributes first, then overlay
 141     * all active ones.
 142     */
 143    switch (get_program_mode(ctx)) {
 144    case VP_NONE:
 145       for (attr = 0; attr < 16; attr++) {
 146          save->inputs[attr] = &vbo->legacy_currval[attr];
 147       }
 148       for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) {
 149          save->inputs[attr + 16] = &vbo->mat_currval[attr];
 150       }
 151       map = vbo->map_vp_none;
 152       break;
 153    case VP_NV:
 154    case VP_ARB:
 155       /* The aliasing of attributes for NV vertex programs has already
 156        * occurred.  NV vertex programs cannot access material values,
 157        * nor attributes greater than VERT_ATTRIB_TEX7.
 158        */
 159       for (attr = 0; attr < 16; attr++) {
 160          save->inputs[attr] = &vbo->legacy_currval[attr];
 161          save->inputs[attr + 16] = &vbo->generic_currval[attr];
 162       }
 163       map = vbo->map_vp_arb;
 164
 165       /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read.
 166        * In that case we effectively need to route the data from
 167        * glVertexAttrib(0, val) calls to feed into the GENERIC0 input.
 168        */
 169       if ((ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_POS) == 0 &&
 170           (ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_GENERIC0)) {
 171          save->inputs[16] = save->inputs[0];
 172          node_attrsz[16] = node_attrsz[0];
 173          node_attrsz[0] = 0;
 174       }
 175       break;
 176    default:
 177       assert(0);
 178    }
 179
 180    for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
 181       GLuint src = map[attr];
 182
 183       if (node_attrsz[src]) {
 184          /* override the default array set above */
 185          save->inputs[attr] = &arrays[attr];
 186
 187          arrays[attr].Ptr = (const GLubyte *) NULL + buffer_offset;
 188          arrays[attr].Size = node->attrsz[src];
 189          arrays[attr].StrideB = node->vertex_size * sizeof(GLfloat);
 190          arrays[attr].Stride = node->vertex_size * sizeof(GLfloat);
 191          arrays[attr].Type = GL_FLOAT;
 192          arrays[attr].Format = GL_RGBA;
 193          arrays[attr].Enabled = 1;
 194          _mesa_reference_buffer_object(ctx,
 195                                        &arrays[attr].BufferObj,
 196                                        node->vertex_store->bufferobj);
 197          arrays[attr]._MaxElement = node->count; /* ??? */
 198
 199          assert(arrays[attr].BufferObj->Name);
 200
 201          buffer_offset += node->attrsz[src] * sizeof(GLfloat);
 202          varying_inputs |= 1<<attr;
 203       }
 204    }
 205
 206    _mesa_set_varying_vp_inputs( ctx, varying_inputs );
 207 }
 208
 209 static void vbo_save_loopback_vertex_list( GLcontext *ctx,
 210                                            const struct vbo_save_vertex_list *list )
 211 {
 212    const char *buffer = ctx->Driver.MapBuffer(ctx,
 213                                               GL_ARRAY_BUFFER_ARB,
 214                                               GL_READ_ONLY, /* ? */
 215                                                list->vertex_store->bufferobj);
 216
 217    vbo_loopback_vertex_list( ctx,
 218                              (const GLfloat *)(buffer + list->buffer_offset),
 219                              list->attrsz,
 220                              list->prim,
 221                              list->prim_count,
 222                              list->wrap_count,
 223                              list->vertex_size);
 224
 225    ctx->Driver.UnmapBuffer(ctx, GL_ARRAY_BUFFER_ARB,
 226                            list->vertex_store->bufferobj);
 227 }
 228
 229
 230 /**
 231  * Execute the buffer and save copied verts.
 232  */
 233 void vbo_save_playback_vertex_list( GLcontext *ctx, void *data )
 234 {
 235    const struct vbo_save_vertex_list *node = (const struct vbo_save_vertex_list *) data;
 236    struct vbo_save_context *save = &vbo_context(ctx)->save;
 237
 238    FLUSH_CURRENT(ctx, 0);
 239
 240    if (node->prim_count > 0 && node->count > 0) {
 241
 242       if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END &&
 243           node->prim[0].begin) {
 244
 245          /* Degenerate case: list is called inside begin/end pair and
 246           * includes operations such as glBegin or glDrawArrays.
 247           */
 248          if (0)
 249             printf("displaylist recursive begin");
 250
 251          vbo_save_loopback_vertex_list( ctx, node );
 252          return;
 253       }
 254       else if (save->replay_flags) {
 255          /* Various degnerate cases: translate into immediate mode
 256           * calls rather than trying to execute in place.
 257           */
 258          vbo_save_loopback_vertex_list( ctx, node );
 259          return;
 260       }
 261
 262       if (ctx->NewState)
 263          _mesa_update_state( ctx );
 264
 265       /* XXX also need to check if shader enabled, but invalid */
 266       if ((ctx->VertexProgram.Enabled && !ctx->VertexProgram._Enabled) ||
 267           (ctx->FragmentProgram.Enabled && !ctx->FragmentProgram._Enabled)) {
 268          _mesa_error(ctx, GL_INVALID_OPERATION,
 269                      "glBegin (invalid vertex/fragment program)");
 270          return;
 271       }
 272
 273       vbo_bind_vertex_list( ctx, node );
 274
 275       /* Again...
 276        */
 277       if (ctx->NewState)
 278          _mesa_update_state( ctx );
 279
 280       vbo_context(ctx)->draw_prims( ctx,
 281                                     save->inputs,
 282                                     node->prim,
 283                                     node->prim_count,
 284                                     NULL,
 285                                     GL_TRUE,
 286                                     0,  /* Node is a VBO, so this is ok */
 287                                     node->count - 1);
 288    }
 289
 290    /* Copy to current?
 291     */
 292    _playback_copy_to_current( ctx, node );
 293 }
 294
 295
 296 #endif /* FEATURE_dlist */