src/mesa/tnl/t_context.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.5.2
   4  *
   5  * Copyright (C) 1999-2006  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_ProgramCacheInit( ctx );
  91       _tnl_install_pipeline( ctx, _tnl_vp_pipeline );
  92    } else {
  93       _tnl_install_pipeline( ctx, _tnl_default_pipeline );
  94    }
  95
  96    /* Initialize the arrayelt helper
  97     */
  98    if (!_ae_create_context( ctx ))
  99       return GL_FALSE;
 100
 101
 102    tnl->NeedNdcCoords = GL_TRUE;
 103    tnl->LoopbackDListCassettes = GL_FALSE;
 104    tnl->CalcDListNormalLengths = GL_TRUE;
 105    tnl->AllowVertexFog = GL_TRUE;
 106    tnl->AllowPixelFog = GL_TRUE;
 107
 108    /* Hook our functions into exec and compile dispatch tables.
 109     */
 110    _mesa_install_exec_vtxfmt( ctx, &tnl->exec_vtxfmt );
 111
 112
 113    /* Set a few default values in the driver struct.
 114     */
 115    install_driver_callbacks(ctx);
 116    ctx->Driver.NeedFlush = 0;
 117    ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
 118    ctx->Driver.CurrentSavePrimitive = PRIM_UNKNOWN;
 119
 120    tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
 121    tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
 122    tnl->Driver.NotifyMaterialChange = _mesa_validate_all_lighting_tables;
 123
 124    return GL_TRUE;
 125 }
 126
 127
 128 void
 129 _tnl_DestroyContext( GLcontext *ctx )
 130 {
 131    TNLcontext *tnl = TNL_CONTEXT(ctx);
 132
 133    _tnl_array_destroy( ctx );
 134    _tnl_vtx_destroy( ctx );
 135    _tnl_save_destroy( ctx );
 136    _tnl_destroy_pipeline( ctx );
 137    _ae_destroy_context( ctx );
 138
 139    if (ctx->_MaintainTnlProgram)
 140       _tnl_ProgramCacheDestroy( ctx );
 141
 142    FREE(tnl);
 143    ctx->swtnl_context = NULL;
 144 }
 145
 146
 147 void
 148 _tnl_InvalidateState( GLcontext *ctx, GLuint new_state )
 149 {
 150    TNLcontext *tnl = TNL_CONTEXT(ctx);
 151
 152    if (new_state & (_NEW_HINT)) {
 153       ASSERT(tnl->AllowVertexFog || tnl->AllowPixelFog);
 154       tnl->_DoVertexFog = (tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 155          || !tnl->AllowPixelFog;
 156    }
 157
 158    _ae_invalidate_state(ctx, new_state);
 159
 160    tnl->pipeline.new_state |= new_state;
 161    tnl->vtx.eval.new_state |= new_state;
 162
 163    /* Calculate tnl->render_inputs:
 164     */
 165    if (ctx->Visual.rgbMode) {
 166       GLuint i;
 167
 168       RENDERINPUTS_ZERO( tnl->render_inputs_bitset );
 169       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POS );
 170       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR0 );
 171       for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
 172          if (ctx->Texture._EnabledCoordUnits & (1 << i)) {
 173             RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_TEX(i) );
 174          }
 175       }
 176
 177       if (NEED_SECONDARY_COLOR(ctx))
 178          RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR1 );
 179    }
 180    else {
 181       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POS );
 182       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR_INDEX );
 183    }
 184
 185    if (ctx->Fog.Enabled ||
 186        (ctx->FragmentProgram._Active &&
 187         (ctx->FragmentProgram._Current->FogOption != GL_NONE ||
 188          ctx->FragmentProgram._Current->Base.InputsRead & FRAG_BIT_FOGC)))
 189       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_FOG );
 190
 191    if (ctx->Polygon.FrontMode != GL_FILL ||
 192        ctx->Polygon.BackMode != GL_FILL)
 193       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_EDGEFLAG );
 194
 195    if (ctx->RenderMode == GL_FEEDBACK)
 196       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_TEX0 );
 197
 198    if (ctx->Point._Attenuated ||
 199        (ctx->VertexProgram._Enabled && ctx->VertexProgram.PointSizeEnabled))
 200       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POINTSIZE );
 201
 202    if (ctx->ShaderObjects._VertexShaderPresent || ctx->ShaderObjects._FragmentShaderPresent)
 203       RENDERINPUTS_SET_RANGE( tnl->render_inputs_bitset, _TNL_FIRST_GENERIC, _TNL_LAST_GENERIC );
 204 }
 205
 206
 207 void
 208 _tnl_wakeup_exec( GLcontext *ctx )
 209 {
 210    TNLcontext *tnl = TNL_CONTEXT(ctx);
 211
 212    install_driver_callbacks(ctx);
 213    ctx->Driver.NeedFlush |= FLUSH_UPDATE_CURRENT;
 214
 215    /* Hook our functions into exec and compile dispatch tables.
 216     */
 217    _mesa_install_exec_vtxfmt( ctx, &tnl->exec_vtxfmt );
 218
 219    /* Assume we haven't been getting state updates either:
 220     */
 221    _tnl_InvalidateState( ctx, ~0 );
 222
 223    if (ctx->Light.ColorMaterialEnabled) {
 224       _mesa_update_color_material( ctx,
 225                                    ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 226    }
 227 }
 228
 229
 230 void
 231 _tnl_wakeup_save_exec( GLcontext *ctx )
 232 {
 233    TNLcontext *tnl = TNL_CONTEXT(ctx);
 234
 235    _tnl_wakeup_exec( ctx );
 236    _mesa_install_save_vtxfmt( ctx, &tnl->save_vtxfmt );
 237 }
 238
 239
 240 /**
 241  * Drivers call this function to tell the TCL module whether or not
 242  * it wants Normalized Device Coords (NDC) computed.  I.e. whether
 243  * we should "Divide-by-W".  Software renders will want that.
 244  */
 245 void
 246 _tnl_need_projected_coords( GLcontext *ctx, GLboolean mode )
 247 {
 248    TNLcontext *tnl = TNL_CONTEXT(ctx);
 249    if (tnl->NeedNdcCoords != mode) {
 250       tnl->NeedNdcCoords = mode;
 251       _tnl_InvalidateState( ctx, _NEW_PROJECTION );
 252    }
 253 }
 254
 255 void
 256 _tnl_need_dlist_loopback( GLcontext *ctx, GLboolean mode )
 257 {
 258    TNLcontext *tnl = TNL_CONTEXT(ctx);
 259    tnl->LoopbackDListCassettes = mode;
 260 }
 261
 262 void
 263 _tnl_need_dlist_norm_lengths( GLcontext *ctx, GLboolean mode )
 264 {
 265    TNLcontext *tnl = TNL_CONTEXT(ctx);
 266    tnl->CalcDListNormalLengths = mode;
 267 }
 268
 269 void
 270 _tnl_isolate_materials( GLcontext *ctx, GLboolean mode )
 271 {
 272    TNLcontext *tnl = TNL_CONTEXT(ctx);
 273    tnl->IsolateMaterials = mode;
 274 }
 275
 276 void
 277 _tnl_allow_vertex_fog( GLcontext *ctx, GLboolean value )
 278 {
 279    TNLcontext *tnl = TNL_CONTEXT(ctx);
 280    tnl->AllowVertexFog = value;
 281    tnl->_DoVertexFog = (tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 282       || !tnl->AllowPixelFog;
 283
 284 }
 285
 286 void
 287 _tnl_allow_pixel_fog( GLcontext *ctx, GLboolean value )
 288 {
 289    TNLcontext *tnl = TNL_CONTEXT(ctx);
 290    tnl->AllowPixelFog = value;
 291    tnl->_DoVertexFog = (tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 292       || !tnl->AllowPixelFog;
 293 }
 294