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_install_pipeline( ctx, _tnl_vp_pipeline );
  92    else
  93       _tnl_install_pipeline( ctx, _tnl_default_pipeline );
  94
  95    /* Initialize the arrayelt helper
  96     */
  97    if (!_ae_create_context( ctx ))
  98       return GL_FALSE;
  99
 100
 101    tnl->NeedNdcCoords = GL_TRUE;
 102    tnl->LoopbackDListCassettes = GL_FALSE;
 103    tnl->CalcDListNormalLengths = GL_TRUE;
 104    tnl->AllowVertexFog = GL_TRUE;
 105    tnl->AllowPixelFog = GL_TRUE;
 106
 107    /* Hook our functions into exec and compile dispatch tables.
 108     */
 109    _mesa_install_exec_vtxfmt( ctx, &tnl->exec_vtxfmt );
 110
 111
 112    /* Set a few default values in the driver struct.
 113     */
 114    install_driver_callbacks(ctx);
 115    ctx->Driver.NeedFlush = 0;
 116    ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
 117    ctx->Driver.CurrentSavePrimitive = PRIM_UNKNOWN;
 118
 119    tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
 120    tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
 121    tnl->Driver.NotifyMaterialChange = _mesa_validate_all_lighting_tables;
 122
 123    return GL_TRUE;
 124 }
 125
 126
 127 void
 128 _tnl_DestroyContext( GLcontext *ctx )
 129 {
 130    TNLcontext *tnl = TNL_CONTEXT(ctx);
 131
 132    _tnl_array_destroy( ctx );
 133    _tnl_vtx_destroy( ctx );
 134    _tnl_save_destroy( ctx );
 135    _tnl_destroy_pipeline( ctx );
 136    _ae_destroy_context( ctx );
 137
 138    _tnl_ProgramCacheDestroy( ctx );
 139
 140    FREE(tnl);
 141    ctx->swtnl_context = NULL;
 142 }
 143
 144
 145 void
 146 _tnl_InvalidateState( GLcontext *ctx, GLuint new_state )
 147 {
 148    TNLcontext *tnl = TNL_CONTEXT(ctx);
 149
 150    if (new_state & (_NEW_HINT)) {
 151       ASSERT(tnl->AllowVertexFog || tnl->AllowPixelFog);
 152       tnl->_DoVertexFog = (tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 153          || !tnl->AllowPixelFog;
 154    }
 155
 156    _ae_invalidate_state(ctx, new_state);
 157
 158    tnl->pipeline.new_state |= new_state;
 159    tnl->vtx.eval.new_state |= new_state;
 160
 161    /* Calculate tnl->render_inputs:
 162     */
 163    if (ctx->Visual.rgbMode) {
 164       tnl->render_inputs = (_TNL_BIT_POS|
 165                             _TNL_BIT_COLOR0|
 166                             (ctx->Texture._EnabledCoordUnits << _TNL_ATTRIB_TEX0));
 167
 168       if (NEED_SECONDARY_COLOR(ctx))
 169          tnl->render_inputs |= _TNL_BIT_COLOR1;
 170    }
 171    else {
 172       tnl->render_inputs |= (_TNL_BIT_POS|_TNL_BIT_INDEX);
 173    }
 174
 175    if (ctx->Fog.Enabled ||
 176        (ctx->FragmentProgram._Active &&
 177         ctx->FragmentProgram._Current->FogOption != GL_NONE))
 178       tnl->render_inputs |= _TNL_BIT_FOG;
 179
 180    if (ctx->Polygon.FrontMode != GL_FILL ||
 181        ctx->Polygon.BackMode != GL_FILL)
 182       tnl->render_inputs |= _TNL_BIT_EDGEFLAG;
 183
 184    if (ctx->RenderMode == GL_FEEDBACK)
 185       tnl->render_inputs |= _TNL_BIT_TEX0;
 186
 187    if (ctx->Point._Attenuated ||
 188        (ctx->VertexProgram._Enabled && ctx->VertexProgram.PointSizeEnabled))
 189       tnl->render_inputs |= _TNL_BIT_POINTSIZE;
 190 }
 191
 192
 193 void
 194 _tnl_wakeup_exec( GLcontext *ctx )
 195 {
 196    TNLcontext *tnl = TNL_CONTEXT(ctx);
 197
 198    install_driver_callbacks(ctx);
 199    ctx->Driver.NeedFlush |= FLUSH_UPDATE_CURRENT;
 200
 201    /* Hook our functions into exec and compile dispatch tables.
 202     */
 203    _mesa_install_exec_vtxfmt( ctx, &tnl->exec_vtxfmt );
 204
 205    /* Assume we haven't been getting state updates either:
 206     */
 207    _tnl_InvalidateState( ctx, ~0 );
 208
 209    if (ctx->Light.ColorMaterialEnabled) {
 210       _mesa_update_color_material( ctx,
 211                                    ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 212    }
 213 }
 214
 215
 216 void
 217 _tnl_wakeup_save_exec( GLcontext *ctx )
 218 {
 219    TNLcontext *tnl = TNL_CONTEXT(ctx);
 220
 221    _tnl_wakeup_exec( ctx );
 222    _mesa_install_save_vtxfmt( ctx, &tnl->save_vtxfmt );
 223 }
 224
 225
 226 /**
 227  * Drivers call this function to tell the TCL module whether or not
 228  * it wants Normalized Device Coords (NDC) computed.  I.e. whether
 229  * we should "Divide-by-W".  Software renders will want that.
 230  */
 231 void
 232 _tnl_need_projected_coords( GLcontext *ctx, GLboolean mode )
 233 {
 234    TNLcontext *tnl = TNL_CONTEXT(ctx);
 235    if (tnl->NeedNdcCoords != mode) {
 236       tnl->NeedNdcCoords = mode;
 237       _tnl_InvalidateState( ctx, _NEW_PROJECTION );
 238    }
 239 }
 240
 241 void
 242 _tnl_need_dlist_loopback( GLcontext *ctx, GLboolean mode )
 243 {
 244    TNLcontext *tnl = TNL_CONTEXT(ctx);
 245    tnl->LoopbackDListCassettes = mode;
 246 }
 247
 248 void
 249 _tnl_need_dlist_norm_lengths( GLcontext *ctx, GLboolean mode )
 250 {
 251    TNLcontext *tnl = TNL_CONTEXT(ctx);
 252    tnl->CalcDListNormalLengths = mode;
 253 }
 254
 255 void
 256 _tnl_isolate_materials( GLcontext *ctx, GLboolean mode )
 257 {
 258    TNLcontext *tnl = TNL_CONTEXT(ctx);
 259    tnl->IsolateMaterials = mode;
 260 }
 261
 262 void
 263 _tnl_allow_vertex_fog( GLcontext *ctx, GLboolean value )
 264 {
 265    TNLcontext *tnl = TNL_CONTEXT(ctx);
 266    tnl->AllowVertexFog = value;
 267 }
 268
 269 void
 270 _tnl_allow_pixel_fog( GLcontext *ctx, GLboolean value )
 271 {
 272    TNLcontext *tnl = TNL_CONTEXT(ctx);
 273    tnl->AllowPixelFog = value;
 274 }
 275