src/mesa/tnl/t_context.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  5.1
   4  *
   5  * Copyright (C) 1999-2003  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  * Authors:
  25  *    Keith Whitwell <keith@tungstengraphics.com>
  26  */
  27
  28
  29 #include "api_arrayelt.h"
  30 #include "glheader.h"
  31 #include "imports.h"
  32 #include "macros.h"
  33 #include "mtypes.h"
  34 #include "dlist.h"
  35 #include "light.h"
  36 #include "vtxfmt.h"
  37
  38 #include "t_context.h"
  39 #include "t_array_api.h"
  40 #include "t_vtx_api.h"
  41 #include "t_save_api.h"
  42 #include "t_pipeline.h"
  43 #include "tnl.h"
  44
  45
  46
  47 void
  48 _tnl_MakeCurrent( GLcontext *ctx,
  49                   GLframebuffer *drawBuffer,
  50                   GLframebuffer *readBuffer )
  51 {
  52 }
  53
  54
  55 static void
  56 install_driver_callbacks( GLcontext *ctx )
  57 {
  58    ctx->Driver.NewList = _tnl_NewList;
  59    ctx->Driver.EndList = _tnl_EndList;
  60    ctx->Driver.FlushVertices = _tnl_FlushVertices;
  61    ctx->Driver.SaveFlushVertices = _tnl_SaveFlushVertices;
  62    ctx->Driver.MakeCurrent = _tnl_MakeCurrent;
  63    ctx->Driver.BeginCallList = _tnl_BeginCallList;
  64    ctx->Driver.EndCallList = _tnl_EndCallList;
  65 }
  66
  67
  68
  69 GLboolean
  70 _tnl_CreateContext( GLcontext *ctx )
  71 {
  72    TNLcontext *tnl;
  73
  74    /* Create the TNLcontext structure
  75     */
  76    ctx->swtnl_context = tnl = (TNLcontext *) CALLOC( sizeof(TNLcontext) );
  77
  78    if (!tnl) {
  79       return GL_FALSE;
  80    }
  81
  82    /* Initialize the VB.
  83     */
  84    tnl->vb.Size = ctx->Const.MaxArrayLockSize + MAX_CLIPPED_VERTICES;
  85
  86
  87    /* Initialize tnl state and tnl->vtxfmt.
  88     */
  89    _tnl_save_init( ctx );
  90    _tnl_array_init( ctx );
  91    _tnl_vtx_init( ctx );
  92    _tnl_install_pipeline( ctx, _tnl_default_pipeline );
  93
  94    /* Initialize the arrayelt helper
  95     */
  96    if (!_ae_create_context( ctx ))
  97       return GL_FALSE;
  98
  99
 100    tnl->NeedNdcCoords = GL_TRUE;
 101    tnl->LoopbackDListCassettes = GL_FALSE;
 102    tnl->CalcDListNormalLengths = GL_TRUE;
 103
 104    /* Hook our functions into exec and compile dispatch tables.
 105     */
 106    _mesa_install_exec_vtxfmt( ctx, &tnl->exec_vtxfmt );
 107
 108
 109    /* Set a few default values in the driver struct.
 110     */
 111    install_driver_callbacks(ctx);
 112    ctx->Driver.NeedFlush = 0;
 113    ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
 114    ctx->Driver.CurrentSavePrimitive = PRIM_UNKNOWN;
 115
 116    tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
 117    tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
 118    tnl->Driver.NotifyMaterialChange = _mesa_validate_all_lighting_tables;
 119
 120    return GL_TRUE;
 121 }
 122
 123
 124 void
 125 _tnl_DestroyContext( GLcontext *ctx )
 126 {
 127    TNLcontext *tnl = TNL_CONTEXT(ctx);
 128
 129    _tnl_array_destroy( ctx );
 130    _tnl_vtx_destroy( ctx );
 131    _tnl_save_destroy( ctx );
 132    _tnl_destroy_pipeline( ctx );
 133    _ae_destroy_context( ctx );
 134
 135    FREE(tnl);
 136    ctx->swtnl_context = 0;
 137 }
 138
 139
 140 void
 141 _tnl_InvalidateState( GLcontext *ctx, GLuint new_state )
 142 {
 143    TNLcontext *tnl = TNL_CONTEXT(ctx);
 144
 145    if (new_state & _NEW_ARRAY) {
 146       tnl->pipeline.run_input_changes |= ctx->Array.NewState; /* overkill */
 147    }
 148
 149    _ae_invalidate_state(ctx, new_state);
 150
 151    tnl->pipeline.run_state_changes |= new_state;
 152    tnl->pipeline.build_state_changes |= (new_state &
 153                                          tnl->pipeline.build_state_trigger);
 154
 155    tnl->vtx.eval.new_state |= new_state;
 156 }
 157
 158
 159 void
 160 _tnl_wakeup_exec( GLcontext *ctx )
 161 {
 162    TNLcontext *tnl = TNL_CONTEXT(ctx);
 163
 164    install_driver_callbacks(ctx);
 165    ctx->Driver.NeedFlush |= FLUSH_UPDATE_CURRENT;
 166
 167    /* Hook our functions into exec and compile dispatch tables.
 168     */
 169    _mesa_install_exec_vtxfmt( ctx, &tnl->exec_vtxfmt );
 170
 171    /* Call all appropriate driver callbacks to revive state.
 172     */
 173    _tnl_MakeCurrent( ctx, ctx->DrawBuffer, ctx->ReadBuffer );
 174
 175    /* Assume we haven't been getting state updates either:
 176     */
 177    _tnl_InvalidateState( ctx, ~0 );
 178    tnl->pipeline.run_input_changes = ~0;
 179
 180    if (ctx->Light.ColorMaterialEnabled) {
 181       _mesa_update_color_material( ctx,
 182                                    ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 183    }
 184 }
 185
 186
 187 void
 188 _tnl_wakeup_save_exec( GLcontext *ctx )
 189 {
 190    TNLcontext *tnl = TNL_CONTEXT(ctx);
 191
 192    _tnl_wakeup_exec( ctx );
 193    _mesa_install_save_vtxfmt( ctx, &tnl->save_vtxfmt );
 194 }
 195
 196
 197 /**
 198  * Drivers call this function to tell the TCL module whether or not
 199  * it wants Normalized Device Coords (NDC) computed.  I.e. whether
 200  * we should "Divide-by-W".  Software renders will want that.
 201  */
 202 void
 203 _tnl_need_projected_coords( GLcontext *ctx, GLboolean mode )
 204 {
 205    TNLcontext *tnl = TNL_CONTEXT(ctx);
 206    if (tnl->NeedNdcCoords != mode) {
 207       tnl->NeedNdcCoords = mode;
 208       _tnl_InvalidateState( ctx, _NEW_PROJECTION );
 209    }
 210 }
 211
 212 void
 213 _tnl_need_dlist_loopback( GLcontext *ctx, GLboolean mode )
 214 {
 215    TNLcontext *tnl = TNL_CONTEXT(ctx);
 216    tnl->LoopbackDListCassettes = mode;
 217 }
 218
 219 void
 220 _tnl_need_dlist_norm_lengths( GLcontext *ctx, GLboolean mode )
 221 {
 222    TNLcontext *tnl = TNL_CONTEXT(ctx);
 223    tnl->CalcDListNormalLengths = mode;
 224 }
 225
 226 void
 227 _tnl_isolate_materials( GLcontext *ctx, GLboolean mode )
 228 {
 229    TNLcontext *tnl = TNL_CONTEXT(ctx);
 230    tnl->IsolateMaterials = mode;
 231 }