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