src/mesa/vbo/vbo_save_draw.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.1
   4  *
   5  * Copyright (C) 1999-2004  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/context.h"
  31 #include "main/imports.h"
  32 #include "main/mtypes.h"
  33 #include "main/macros.h"
  34 #include "main/light.h"
  35 #include "main/state.h"
  36
  37 #include "vbo_context.h"
  38
  39
  40 /*
  41  * After playback, copy everything but the position from the
  42  * last vertex to the saved state
  43  */
  44 static void _playback_copy_to_current( GLcontext *ctx,
  45                                        const struct vbo_save_vertex_list *node )
  46 {
  47    struct vbo_context *vbo = vbo_context(ctx);
  48    GLfloat vertex[VBO_ATTRIB_MAX * 4], *data = vertex;
  49    GLuint i, offset;
  50
  51    if (node->count)
  52       offset = (node->buffer_offset +
  53                 (node->count-1) * node->vertex_size * sizeof(GLfloat));
  54    else
  55       offset = node->buffer_offset;
  56
  57    ctx->Driver.GetBufferSubData( ctx, 0, offset,
  58                                  node->vertex_size * sizeof(GLfloat),
  59                                  data, node->vertex_store->bufferobj );
  60
  61    data += node->attrsz[0]; /* skip vertex position */
  62
  63    for (i = VBO_ATTRIB_POS+1 ; i < VBO_ATTRIB_MAX ; i++) {
  64       if (node->attrsz[i]) {
  65          GLfloat *current = (GLfloat *)vbo->currval[i].Ptr;
  66
  67          COPY_CLEAN_4V(current,
  68                        node->attrsz[i],
  69                        data);
  70
  71          vbo->currval[i].Size = node->attrsz[i];
  72
  73          data += node->attrsz[i];
  74
  75          if (i >= VBO_ATTRIB_FIRST_MATERIAL &&
  76              i <= VBO_ATTRIB_LAST_MATERIAL)
  77             ctx->NewState |= _NEW_LIGHT;
  78       }
  79    }
  80
  81    /* Colormaterial -- this kindof sucks.
  82     */
  83    if (ctx->Light.ColorMaterialEnabled) {
  84       _mesa_update_color_material(ctx, ctx->Current.Attrib[VBO_ATTRIB_COLOR0]);
  85    }
  86
  87    /* CurrentExecPrimitive
  88     */
  89    if (node->prim_count) {
  90       const struct _mesa_prim *prim = &node->prim[node->prim_count - 1];
  91       if (prim->end)
  92          ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
  93       else
  94          ctx->Driver.CurrentExecPrimitive = prim->mode;
  95    }
  96 }
  97
  98
  99
 100 /* Treat the vertex storage as a VBO, define vertex arrays pointing
 101  * into it:
 102  */
 103 static void vbo_bind_vertex_list( GLcontext *ctx,
 104                                    const struct vbo_save_vertex_list *node )
 105 {
 106    struct vbo_context *vbo = vbo_context(ctx);
 107    struct vbo_save_context *save = &vbo->save;
 108    struct gl_client_array *arrays = save->arrays;
 109    GLuint data = node->buffer_offset;
 110    const GLuint *map;
 111    GLuint attr;
 112
 113    /* Install the default (ie Current) attributes first, then overlay
 114     * all active ones.
 115     */
 116    switch (get_program_mode(ctx)) {
 117    case VP_NONE:
 118       memcpy(arrays,      vbo->legacy_currval, 16 * sizeof(arrays[0]));
 119       memcpy(arrays + 16, vbo->mat_currval,    MAT_ATTRIB_MAX * sizeof(arrays[0]));
 120       map = vbo->map_vp_none;
 121       break;
 122    case VP_NV:
 123    case VP_ARB:
 124       /* The aliasing of attributes for NV vertex programs has already
 125        * occurred.  NV vertex programs cannot access material values,
 126        * nor attributes greater than VERT_ATTRIB_TEX7.
 127        */
 128       memcpy(arrays,      vbo->legacy_currval,  16 * sizeof(arrays[0]));
 129       memcpy(arrays + 16, vbo->generic_currval, 16 * sizeof(arrays[0]));
 130       map = vbo->map_vp_arb;
 131       break;
 132    }
 133
 134    for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
 135       GLuint src = map[attr];
 136
 137       if (node->attrsz[src]) {
 138          arrays[attr].Ptr = (const GLubyte *)data;
 139          arrays[attr].Size = node->attrsz[src];
 140          arrays[attr].StrideB = node->vertex_size * sizeof(GLfloat);
 141          arrays[attr].Stride = node->vertex_size * sizeof(GLfloat);
 142          arrays[attr].Type = GL_FLOAT;
 143          arrays[attr].Enabled = 1;
 144          arrays[attr].BufferObj = node->vertex_store->bufferobj;
 145          arrays[attr]._MaxElement = node->count; /* ??? */
 146
 147          assert(arrays[attr].BufferObj->Name);
 148
 149          data += node->attrsz[src] * sizeof(GLfloat);
 150       }
 151    }
 152 }
 153
 154 static void vbo_save_loopback_vertex_list( GLcontext *ctx,
 155                                            const struct vbo_save_vertex_list *list )
 156 {
 157    const char *buffer = ctx->Driver.MapBuffer(ctx,
 158                                               GL_ARRAY_BUFFER_ARB,
 159                                               GL_READ_ONLY, /* ? */
 160                                                list->vertex_store->bufferobj);
 161
 162    vbo_loopback_vertex_list( ctx,
 163                              (const GLfloat *)(buffer + list->buffer_offset),
 164                              list->attrsz,
 165                              list->prim,
 166                              list->prim_count,
 167                              list->wrap_count,
 168                              list->vertex_size);
 169
 170    ctx->Driver.UnmapBuffer(ctx, GL_ARRAY_BUFFER_ARB,
 171                            list->vertex_store->bufferobj);
 172 }
 173
 174
 175 /**
 176  * Execute the buffer and save copied verts.
 177  */
 178 void vbo_save_playback_vertex_list( GLcontext *ctx, void *data )
 179 {
 180    const struct vbo_save_vertex_list *node = (const struct vbo_save_vertex_list *) data;
 181    struct vbo_save_context *save = &vbo_context(ctx)->save;
 182
 183    FLUSH_CURRENT(ctx, 0);
 184
 185    if (node->prim_count > 0 && node->count > 0) {
 186
 187       if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END &&
 188           node->prim[0].begin) {
 189
 190          /* Degenerate case: list is called inside begin/end pair and
 191           * includes operations such as glBegin or glDrawArrays.
 192           */
 193          if (0)
 194             _mesa_printf("displaylist recursive begin");
 195
 196          vbo_save_loopback_vertex_list( ctx, node );
 197          return;
 198       }
 199       else if (save->replay_flags) {
 200          /* Various degnerate cases: translate into immediate mode
 201           * calls rather than trying to execute in place.
 202           */
 203          vbo_save_loopback_vertex_list( ctx, node );
 204          return;
 205       }
 206
 207       if (ctx->NewState)
 208          _mesa_update_state( ctx );
 209
 210       /* XXX also need to check if shader enabled, but invalid */
 211       if ((ctx->VertexProgram.Enabled && !ctx->VertexProgram._Enabled) ||
 212           (ctx->FragmentProgram.Enabled && !ctx->FragmentProgram._Enabled)) {
 213          _mesa_error(ctx, GL_INVALID_OPERATION,
 214                      "glBegin (invalid vertex/fragment program)");
 215          return;
 216       }
 217
 218       vbo_bind_vertex_list( ctx, node );
 219
 220       vbo_context(ctx)->draw_prims( ctx,
 221                                     save->inputs,
 222                                     node->prim,
 223                                     node->prim_count,
 224                                     NULL,
 225                                     0,  /* Node is a VBO, so this is ok */
 226                                     node->count - 1);
 227    }
 228
 229    /* Copy to current?
 230     */
 231    _playback_copy_to_current( ctx, node );
 232 }