src/mesa/tnl/t_context.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.5
   4  *
   5  * Copyright (C) 1999-2005  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 "context.h"
  33 #include "macros.h"
  34 #include "mtypes.h"
  35 #include "dlist.h"
  36 #include "light.h"
  37 #include "vtxfmt.h"
  38
  39 #include "tnl.h"
  40 #include "t_array_api.h"
  41 #include "t_context.h"
  42 #include "t_pipeline.h"
  43 #include "t_save_api.h"
  44 #include "t_vp_build.h"
  45 #include "t_vtx_api.h"
  46
  47
  48
  49 static void
  50 install_driver_callbacks( GLcontext *ctx )
  51 {
  52    ctx->Driver.NewList = _tnl_NewList;
  53    ctx->Driver.EndList = _tnl_EndList;
  54    ctx->Driver.FlushVertices = _tnl_FlushVertices;
  55    ctx->Driver.SaveFlushVertices = _tnl_SaveFlushVertices;
  56    ctx->Driver.BeginCallList = _tnl_BeginCallList;
  57    ctx->Driver.EndCallList = _tnl_EndCallList;
  58 }
  59
  60
  61
  62 GLboolean
  63 _tnl_CreateContext( GLcontext *ctx )
  64 {
  65    TNLcontext *tnl;
  66
  67    /* Create the TNLcontext structure
  68     */
  69    ctx->swtnl_context = tnl = (TNLcontext *) CALLOC( sizeof(TNLcontext) );
  70
  71    if (!tnl) {
  72       return GL_FALSE;
  73    }
  74
  75    if (_mesa_getenv("MESA_CODEGEN"))
  76       tnl->AllowCodegen = GL_TRUE;
  77
  78    /* Initialize the VB.
  79     */
  80    tnl->vb.Size = ctx->Const.MaxArrayLockSize + MAX_CLIPPED_VERTICES;
  81
  82
  83    /* Initialize tnl state and tnl->vtxfmt.
  84     */
  85    _tnl_save_init( ctx );
  86    _tnl_array_init( ctx );
  87    _tnl_vtx_init( ctx );
  88
  89    if (ctx->_MaintainTnlProgram) {
  90       tnl->vp_cache = MALLOC(sizeof(*tnl->vp_cache));
  91       tnl->vp_cache->size = 5;
  92       tnl->vp_cache->n_items = 0;
  93       tnl->vp_cache->items = MALLOC(tnl->vp_cache->size *
  94                                 sizeof(*tnl->vp_cache->items));
  95       _mesa_memset(tnl->vp_cache->items, 0, tnl->vp_cache->size *
  96                                 sizeof(*tnl->vp_cache->items));
  97
  98       _tnl_install_pipeline( ctx, _tnl_vp_pipeline );
  99    } else {
 100       _tnl_install_pipeline( ctx, _tnl_default_pipeline );
 101    }
 102
 103    /* Initialize the arrayelt helper
 104     */
 105    if (!_ae_create_context( ctx ))
 106       return GL_FALSE;
 107
 108
 109    tnl->NeedNdcCoords = GL_TRUE;
 110    tnl->LoopbackDListCassettes = GL_FALSE;
 111    tnl->CalcDListNormalLengths = GL_TRUE;
 112    tnl->AllowVertexFog = GL_TRUE;
 113    tnl->AllowPixelFog = GL_TRUE;
 114
 115    /* Hook our functions into exec and compile dispatch tables.
 116     */
 117    _mesa_install_exec_vtxfmt( ctx, &tnl->exec_vtxfmt );
 118
 119
 120    /* Set a few default values in the driver struct.
 121     */
 122    install_driver_callbacks(ctx);
 123    ctx->Driver.NeedFlush = 0;
 124    ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
 125    ctx->Driver.CurrentSavePrimitive = PRIM_UNKNOWN;
 126
 127    tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
 128    tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
 129    tnl->Driver.NotifyMaterialChange = _mesa_validate_all_lighting_tables;
 130
 131    return GL_TRUE;
 132 }
 133
 134
 135 void
 136 _tnl_DestroyContext( GLcontext *ctx )
 137 {
 138    TNLcontext *tnl = TNL_CONTEXT(ctx);
 139
 140    _tnl_array_destroy( ctx );
 141    _tnl_vtx_destroy( ctx );
 142    _tnl_save_destroy( ctx );
 143    _tnl_destroy_pipeline( ctx );
 144    _ae_destroy_context( ctx );
 145
 146    if (ctx->_MaintainTnlProgram)
 147       _tnl_ProgramCacheDestroy( ctx );
 148
 149    FREE(tnl);
 150    ctx->swtnl_context = NULL;
 151 }
 152
 153
 154 void
 155 _tnl_InvalidateState( GLcontext *ctx, GLuint new_state )
 156 {
 157    TNLcontext *tnl = TNL_CONTEXT(ctx);
 158
 159    if (new_state & (_NEW_HINT)) {
 160       ASSERT(tnl->AllowVertexFog || tnl->AllowPixelFog);
 161       tnl->_DoVertexFog = (tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 162          || !tnl->AllowPixelFog;
 163    }
 164
 165    _ae_invalidate_state(ctx, new_state);
 166
 167    tnl->pipeline.new_state |= new_state;
 168    tnl->vtx.eval.new_state |= new_state;
 169
 170    /* Calculate tnl->render_inputs:
 171     */
 172    if (ctx->Visual.rgbMode) {
 173       tnl->render_inputs = (_TNL_BIT_POS|
 174                             _TNL_BIT_COLOR0|
 175                             (ctx->Texture._EnabledCoordUnits << _TNL_ATTRIB_TEX0));
 176
 177       if (NEED_SECONDARY_COLOR(ctx))
 178          tnl->render_inputs |= _TNL_BIT_COLOR1;
 179    }
 180    else {
 181       tnl->render_inputs |= (_TNL_BIT_POS|_TNL_BIT_INDEX);
 182    }
 183
 184    if (ctx->Fog.Enabled ||
 185        (ctx->FragmentProgram._Active &&
 186         ctx->FragmentProgram._Current->FogOption != GL_NONE))
 187       tnl->render_inputs |= _TNL_BIT_FOG;
 188
 189    if (ctx->Polygon.FrontMode != GL_FILL ||
 190        ctx->Polygon.BackMode != GL_FILL)
 191       tnl->render_inputs |= _TNL_BIT_EDGEFLAG;
 192
 193    if (ctx->RenderMode == GL_FEEDBACK)
 194       tnl->render_inputs |= _TNL_BIT_TEX0;
 195
 196    if (ctx->Point._Attenuated ||
 197        (ctx->VertexProgram._Enabled && ctx->VertexProgram.PointSizeEnabled))
 198       tnl->render_inputs |= _TNL_BIT_POINTSIZE;
 199 }
 200
 201
 202 void
 203 _tnl_wakeup_exec( GLcontext *ctx )
 204 {
 205    TNLcontext *tnl = TNL_CONTEXT(ctx);
 206
 207    install_driver_callbacks(ctx);
 208    ctx->Driver.NeedFlush |= FLUSH_UPDATE_CURRENT;
 209
 210    /* Hook our functions into exec and compile dispatch tables.
 211     */
 212    _mesa_install_exec_vtxfmt( ctx, &tnl->exec_vtxfmt );
 213
 214    /* Assume we haven't been getting state updates either:
 215     */
 216    _tnl_InvalidateState( ctx, ~0 );
 217
 218    if (ctx->Light.ColorMaterialEnabled) {
 219       _mesa_update_color_material( ctx,
 220                                    ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 221    }
 222 }
 223
 224
 225 void
 226 _tnl_wakeup_save_exec( GLcontext *ctx )
 227 {
 228    TNLcontext *tnl = TNL_CONTEXT(ctx);
 229
 230    _tnl_wakeup_exec( ctx );
 231    _mesa_install_save_vtxfmt( ctx, &tnl->save_vtxfmt );
 232 }
 233
 234
 235 /**
 236  * Drivers call this function to tell the TCL module whether or not
 237  * it wants Normalized Device Coords (NDC) computed.  I.e. whether
 238  * we should "Divide-by-W".  Software renders will want that.
 239  */
 240 void
 241 _tnl_need_projected_coords( GLcontext *ctx, GLboolean mode )
 242 {
 243    TNLcontext *tnl = TNL_CONTEXT(ctx);
 244    if (tnl->NeedNdcCoords != mode) {
 245       tnl->NeedNdcCoords = mode;
 246       _tnl_InvalidateState( ctx, _NEW_PROJECTION );
 247    }
 248 }
 249
 250 void
 251 _tnl_need_dlist_loopback( GLcontext *ctx, GLboolean mode )
 252 {
 253    TNLcontext *tnl = TNL_CONTEXT(ctx);
 254    tnl->LoopbackDListCassettes = mode;
 255 }
 256
 257 void
 258 _tnl_need_dlist_norm_lengths( GLcontext *ctx, GLboolean mode )
 259 {
 260    TNLcontext *tnl = TNL_CONTEXT(ctx);
 261    tnl->CalcDListNormalLengths = mode;
 262 }
 263
 264 void
 265 _tnl_isolate_materials( GLcontext *ctx, GLboolean mode )
 266 {
 267    TNLcontext *tnl = TNL_CONTEXT(ctx);
 268    tnl->IsolateMaterials = mode;
 269 }
 270
 271 void
 272 _tnl_allow_vertex_fog( GLcontext *ctx, GLboolean value )
 273 {
 274    TNLcontext *tnl = TNL_CONTEXT(ctx);
 275    tnl->AllowVertexFog = value;
 276 }
 277
 278 void
 279 _tnl_allow_pixel_fog( GLcontext *ctx, GLboolean value )
 280 {
 281    TNLcontext *tnl = TNL_CONTEXT(ctx);
 282    tnl->AllowPixelFog = value;
 283 }
 284