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 "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 "t_context.h"
  41 #include "t_array_api.h"
  42 #include "t_vtx_api.h"
  43 #include "t_save_api.h"
  44 #include "t_pipeline.h"
  45 #include "tnl.h"
  46
  47
  48
  49 void
  50 _tnl_MakeCurrent( GLcontext *ctx,
  51                   GLframebuffer *drawBuffer,
  52                   GLframebuffer *readBuffer )
  53 {
  54 }
  55
  56
  57 static void
  58 install_driver_callbacks( GLcontext *ctx )
  59 {
  60    ctx->Driver.NewList = _tnl_NewList;
  61    ctx->Driver.EndList = _tnl_EndList;
  62    ctx->Driver.FlushVertices = _tnl_FlushVertices;
  63    ctx->Driver.SaveFlushVertices = _tnl_SaveFlushVertices;
  64    ctx->Driver.MakeCurrent = _tnl_MakeCurrent;
  65    ctx->Driver.BeginCallList = _tnl_BeginCallList;
  66    ctx->Driver.EndCallList = _tnl_EndCallList;
  67 }
  68
  69
  70
  71 GLboolean
  72 _tnl_CreateContext( GLcontext *ctx )
  73 {
  74    TNLcontext *tnl;
  75
  76    /* Create the TNLcontext structure
  77     */
  78    ctx->swtnl_context = tnl = (TNLcontext *) CALLOC( sizeof(TNLcontext) );
  79
  80    if (!tnl) {
  81       return GL_FALSE;
  82    }
  83
  84    if (getenv("MESA_CODEGEN"))
  85       tnl->AllowCodegen = GL_TRUE;
  86
  87    /* Initialize the VB.
  88     */
  89    tnl->vb.Size = ctx->Const.MaxArrayLockSize + MAX_CLIPPED_VERTICES;
  90
  91
  92    /* Initialize tnl state and tnl->vtxfmt.
  93     */
  94    _tnl_save_init( ctx );
  95    _tnl_array_init( ctx );
  96    _tnl_vtx_init( ctx );
  97    _tnl_install_pipeline( ctx, _tnl_default_pipeline );
  98
  99    /* Initialize the arrayelt helper
 100     */
 101    if (!_ae_create_context( ctx ))
 102       return GL_FALSE;
 103
 104
 105    tnl->NeedNdcCoords = GL_TRUE;
 106    tnl->LoopbackDListCassettes = GL_FALSE;
 107    tnl->CalcDListNormalLengths = GL_TRUE;
 108    tnl->AllowVertexFog = GL_TRUE;
 109    tnl->AllowPixelFog = GL_TRUE;
 110
 111    /* Hook our functions into exec and compile dispatch tables.
 112     */
 113    _mesa_install_exec_vtxfmt( ctx, &tnl->exec_vtxfmt );
 114
 115
 116    /* Set a few default values in the driver struct.
 117     */
 118    install_driver_callbacks(ctx);
 119    ctx->Driver.NeedFlush = 0;
 120    ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
 121    ctx->Driver.CurrentSavePrimitive = PRIM_UNKNOWN;
 122
 123    tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
 124    tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
 125    tnl->Driver.NotifyMaterialChange = _mesa_validate_all_lighting_tables;
 126
 127    return GL_TRUE;
 128 }
 129
 130
 131 void
 132 _tnl_DestroyContext( GLcontext *ctx )
 133 {
 134    TNLcontext *tnl = TNL_CONTEXT(ctx);
 135
 136    _tnl_array_destroy( ctx );
 137    _tnl_vtx_destroy( ctx );
 138    _tnl_save_destroy( ctx );
 139    _tnl_destroy_pipeline( ctx );
 140    _ae_destroy_context( ctx );
 141
 142    FREE(tnl);
 143    ctx->swtnl_context = 0;
 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    if (new_state & _NEW_ARRAY) {
 159       tnl->pipeline.run_input_changes |= ctx->Array.NewState; /* overkill */
 160    }
 161
 162    _ae_invalidate_state(ctx, new_state);
 163
 164    tnl->pipeline.run_state_changes |= new_state;
 165    tnl->pipeline.build_state_changes |= (new_state &
 166                                          tnl->pipeline.build_state_trigger);
 167
 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       tnl->render_inputs |= _TNL_BIT_FOG;
 186
 187    if (ctx->Polygon.FrontMode != GL_FILL ||
 188        ctx->Polygon.BackMode != GL_FILL)
 189       tnl->render_inputs |= _TNL_BIT_EDGEFLAG;
 190
 191    if (ctx->RenderMode == GL_FEEDBACK)
 192       tnl->render_inputs |= _TNL_BIT_TEX0;
 193
 194    if (ctx->Point._Attenuated ||
 195        (ctx->VertexProgram.Enabled && ctx->VertexProgram.PointSizeEnabled))
 196       tnl->render_inputs |= _TNL_BIT_POINTSIZE;
 197 }
 198
 199
 200 void
 201 _tnl_wakeup_exec( GLcontext *ctx )
 202 {
 203    TNLcontext *tnl = TNL_CONTEXT(ctx);
 204
 205    install_driver_callbacks(ctx);
 206    ctx->Driver.NeedFlush |= FLUSH_UPDATE_CURRENT;
 207
 208    /* Hook our functions into exec and compile dispatch tables.
 209     */
 210    _mesa_install_exec_vtxfmt( ctx, &tnl->exec_vtxfmt );
 211
 212    /* Call all appropriate driver callbacks to revive state.
 213     */
 214    _tnl_MakeCurrent( ctx, ctx->DrawBuffer, ctx->ReadBuffer );
 215
 216    /* Assume we haven't been getting state updates either:
 217     */
 218    _tnl_InvalidateState( ctx, ~0 );
 219    tnl->pipeline.run_input_changes = ~0;
 220
 221    if (ctx->Light.ColorMaterialEnabled) {
 222       _mesa_update_color_material( ctx,
 223                                    ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 224    }
 225 }
 226
 227
 228 void
 229 _tnl_wakeup_save_exec( GLcontext *ctx )
 230 {
 231    TNLcontext *tnl = TNL_CONTEXT(ctx);
 232
 233    _tnl_wakeup_exec( ctx );
 234    _mesa_install_save_vtxfmt( ctx, &tnl->save_vtxfmt );
 235 }
 236
 237
 238 /**
 239  * Drivers call this function to tell the TCL module whether or not
 240  * it wants Normalized Device Coords (NDC) computed.  I.e. whether
 241  * we should "Divide-by-W".  Software renders will want that.
 242  */
 243 void
 244 _tnl_need_projected_coords( GLcontext *ctx, GLboolean mode )
 245 {
 246    TNLcontext *tnl = TNL_CONTEXT(ctx);
 247    if (tnl->NeedNdcCoords != mode) {
 248       tnl->NeedNdcCoords = mode;
 249       _tnl_InvalidateState( ctx, _NEW_PROJECTION );
 250    }
 251 }
 252
 253 void
 254 _tnl_need_dlist_loopback( GLcontext *ctx, GLboolean mode )
 255 {
 256    TNLcontext *tnl = TNL_CONTEXT(ctx);
 257    tnl->LoopbackDListCassettes = mode;
 258 }
 259
 260 void
 261 _tnl_need_dlist_norm_lengths( GLcontext *ctx, GLboolean mode )
 262 {
 263    TNLcontext *tnl = TNL_CONTEXT(ctx);
 264    tnl->CalcDListNormalLengths = mode;
 265 }
 266
 267 void
 268 _tnl_isolate_materials( GLcontext *ctx, GLboolean mode )
 269 {
 270    TNLcontext *tnl = TNL_CONTEXT(ctx);
 271    tnl->IsolateMaterials = mode;
 272 }
 273
 274 void
 275 _tnl_allow_vertex_fog( GLcontext *ctx, GLboolean value )
 276 {
 277    TNLcontext *tnl = TNL_CONTEXT(ctx);
 278    tnl->AllowVertexFog = value;
 279 }
 280
 281 void
 282 _tnl_allow_pixel_fog( GLcontext *ctx, GLboolean value )
 283 {
 284    TNLcontext *tnl = TNL_CONTEXT(ctx);
 285    tnl->AllowPixelFog = value;
 286 }
 287