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 #include "nvfragprog.h"
  39
  40 #include "tnl.h"
  41 #include "t_array_api.h"
  42 #include "t_context.h"
  43 #include "t_pipeline.h"
  44 #include "t_save_api.h"
  45 #include "t_vp_build.h"
  46 #include "t_vtx_api.h"
  47
  48
  49
  50 static void
  51 install_driver_callbacks( GLcontext *ctx )
  52 {
  53    ctx->Driver.NewList = _tnl_NewList;
  54    ctx->Driver.EndList = _tnl_EndList;
  55    ctx->Driver.FlushVertices = _tnl_FlushVertices;
  56    ctx->Driver.SaveFlushVertices = _tnl_SaveFlushVertices;
  57    ctx->Driver.BeginCallList = _tnl_BeginCallList;
  58    ctx->Driver.EndCallList = _tnl_EndCallList;
  59 }
  60
  61
  62
  63 GLboolean
  64 _tnl_CreateContext( GLcontext *ctx )
  65 {
  66    TNLcontext *tnl;
  67
  68    /* Create the TNLcontext structure
  69     */
  70    ctx->swtnl_context = tnl = (TNLcontext *) CALLOC( sizeof(TNLcontext) );
  71
  72    if (!tnl) {
  73       return GL_FALSE;
  74    }
  75
  76    if (_mesa_getenv("MESA_CODEGEN"))
  77       tnl->AllowCodegen = GL_TRUE;
  78
  79    /* Initialize the VB.
  80     */
  81    tnl->vb.Size = ctx->Const.MaxArrayLockSize + MAX_CLIPPED_VERTICES;
  82
  83
  84    /* Initialize tnl state and tnl->vtxfmt.
  85     */
  86    _tnl_save_init( ctx );
  87    _tnl_array_init( ctx );
  88    _tnl_vtx_init( ctx );
  89
  90    if (ctx->_MaintainTnlProgram) {
  91       tnl->vp_cache = MALLOC(sizeof(*tnl->vp_cache));
  92       tnl->vp_cache->size = 5;
  93       tnl->vp_cache->n_items = 0;
  94       tnl->vp_cache->items = MALLOC(tnl->vp_cache->size *
  95                                 sizeof(*tnl->vp_cache->items));
  96       _mesa_memset(tnl->vp_cache->items, 0, tnl->vp_cache->size *
  97                                 sizeof(*tnl->vp_cache->items));
  98
  99       _tnl_install_pipeline( ctx, _tnl_vp_pipeline );
 100    } else {
 101       _tnl_install_pipeline( ctx, _tnl_default_pipeline );
 102    }
 103
 104    /* Initialize the arrayelt helper
 105     */
 106    if (!_ae_create_context( ctx ))
 107       return GL_FALSE;
 108
 109
 110    tnl->NeedNdcCoords = GL_TRUE;
 111    tnl->LoopbackDListCassettes = GL_FALSE;
 112    tnl->CalcDListNormalLengths = GL_TRUE;
 113    tnl->AllowVertexFog = GL_TRUE;
 114    tnl->AllowPixelFog = GL_TRUE;
 115
 116    /* Hook our functions into exec and compile dispatch tables.
 117     */
 118    _mesa_install_exec_vtxfmt( ctx, &tnl->exec_vtxfmt );
 119
 120
 121    /* Set a few default values in the driver struct.
 122     */
 123    install_driver_callbacks(ctx);
 124    ctx->Driver.NeedFlush = 0;
 125    ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
 126    ctx->Driver.CurrentSavePrimitive = PRIM_UNKNOWN;
 127
 128    tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
 129    tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
 130    tnl->Driver.NotifyMaterialChange = _mesa_validate_all_lighting_tables;
 131
 132    return GL_TRUE;
 133 }
 134
 135
 136 void
 137 _tnl_DestroyContext( GLcontext *ctx )
 138 {
 139    TNLcontext *tnl = TNL_CONTEXT(ctx);
 140
 141    _tnl_array_destroy( ctx );
 142    _tnl_vtx_destroy( ctx );
 143    _tnl_save_destroy( ctx );
 144    _tnl_destroy_pipeline( ctx );
 145    _ae_destroy_context( ctx );
 146
 147    if (ctx->_MaintainTnlProgram)
 148       _tnl_ProgramCacheDestroy( ctx );
 149
 150    FREE(tnl);
 151    ctx->swtnl_context = NULL;
 152 }
 153
 154
 155 void
 156 _tnl_InvalidateState( GLcontext *ctx, GLuint new_state )
 157 {
 158    TNLcontext *tnl = TNL_CONTEXT(ctx);
 159
 160    if (new_state & (_NEW_HINT)) {
 161       ASSERT(tnl->AllowVertexFog || tnl->AllowPixelFog);
 162       tnl->_DoVertexFog = (tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 163          || !tnl->AllowPixelFog;
 164    }
 165
 166    _ae_invalidate_state(ctx, new_state);
 167
 168    tnl->pipeline.new_state |= new_state;
 169    tnl->vtx.eval.new_state |= new_state;
 170
 171    /* Calculate tnl->render_inputs:
 172     */
 173    if (ctx->Visual.rgbMode) {
 174       tnl->render_inputs = (_TNL_BIT_POS|
 175                             _TNL_BIT_COLOR0|
 176                             (ctx->Texture._EnabledCoordUnits << _TNL_ATTRIB_TEX0));
 177
 178       if (NEED_SECONDARY_COLOR(ctx))
 179          tnl->render_inputs |= _TNL_BIT_COLOR1;
 180    }
 181    else {
 182       tnl->render_inputs |= (_TNL_BIT_POS|_TNL_BIT_INDEX);
 183    }
 184
 185    if (ctx->Fog.Enabled ||
 186        (ctx->FragmentProgram._Active &&
 187         ctx->FragmentProgram._Current->FogOption != GL_NONE))
 188       tnl->render_inputs |= _TNL_BIT_FOG;
 189
 190    if (ctx->Polygon.FrontMode != GL_FILL ||
 191        ctx->Polygon.BackMode != GL_FILL)
 192       tnl->render_inputs |= _TNL_BIT_EDGEFLAG;
 193
 194    if (ctx->RenderMode == GL_FEEDBACK)
 195       tnl->render_inputs |= _TNL_BIT_TEX0;
 196
 197    if (ctx->Point._Attenuated ||
 198        (ctx->VertexProgram._Enabled && ctx->VertexProgram.PointSizeEnabled))
 199       tnl->render_inputs |= _TNL_BIT_POINTSIZE;
 200 }
 201
 202
 203 void
 204 _tnl_wakeup_exec( GLcontext *ctx )
 205 {
 206    TNLcontext *tnl = TNL_CONTEXT(ctx);
 207
 208    install_driver_callbacks(ctx);
 209    ctx->Driver.NeedFlush |= FLUSH_UPDATE_CURRENT;
 210
 211    /* Hook our functions into exec and compile dispatch tables.
 212     */
 213    _mesa_install_exec_vtxfmt( ctx, &tnl->exec_vtxfmt );
 214
 215    /* Assume we haven't been getting state updates either:
 216     */
 217    _tnl_InvalidateState( ctx, ~0 );
 218
 219    if (ctx->Light.ColorMaterialEnabled) {
 220       _mesa_update_color_material( ctx,
 221                                    ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 222    }
 223 }
 224
 225
 226 void
 227 _tnl_wakeup_save_exec( GLcontext *ctx )
 228 {
 229    TNLcontext *tnl = TNL_CONTEXT(ctx);
 230
 231    _tnl_wakeup_exec( ctx );
 232    _mesa_install_save_vtxfmt( ctx, &tnl->save_vtxfmt );
 233 }
 234
 235
 236 /**
 237  * Drivers call this function to tell the TCL module whether or not
 238  * it wants Normalized Device Coords (NDC) computed.  I.e. whether
 239  * we should "Divide-by-W".  Software renders will want that.
 240  */
 241 void
 242 _tnl_need_projected_coords( GLcontext *ctx, GLboolean mode )
 243 {
 244    TNLcontext *tnl = TNL_CONTEXT(ctx);
 245    if (tnl->NeedNdcCoords != mode) {
 246       tnl->NeedNdcCoords = mode;
 247       _tnl_InvalidateState( ctx, _NEW_PROJECTION );
 248    }
 249 }
 250
 251 void
 252 _tnl_need_dlist_loopback( GLcontext *ctx, GLboolean mode )
 253 {
 254    TNLcontext *tnl = TNL_CONTEXT(ctx);
 255    tnl->LoopbackDListCassettes = mode;
 256 }
 257
 258 void
 259 _tnl_need_dlist_norm_lengths( GLcontext *ctx, GLboolean mode )
 260 {
 261    TNLcontext *tnl = TNL_CONTEXT(ctx);
 262    tnl->CalcDListNormalLengths = mode;
 263 }
 264
 265 void
 266 _tnl_isolate_materials( GLcontext *ctx, GLboolean mode )
 267 {
 268    TNLcontext *tnl = TNL_CONTEXT(ctx);
 269    tnl->IsolateMaterials = mode;
 270 }
 271
 272 void
 273 _tnl_allow_vertex_fog( GLcontext *ctx, GLboolean value )
 274 {
 275    TNLcontext *tnl = TNL_CONTEXT(ctx);
 276    tnl->AllowVertexFog = value;
 277 }
 278
 279 void
 280 _tnl_allow_pixel_fog( GLcontext *ctx, GLboolean value )
 281 {
 282    TNLcontext *tnl = TNL_CONTEXT(ctx);
 283    tnl->AllowPixelFog = value;
 284 }
 285