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    /* Initialize the VB.
  85     */
  86    tnl->vb.Size = ctx->Const.MaxArrayLockSize + MAX_CLIPPED_VERTICES;
  87
  88
  89    /* Initialize tnl state and tnl->vtxfmt.
  90     */
  91    _tnl_save_init( ctx );
  92    _tnl_array_init( ctx );
  93    _tnl_vtx_init( ctx );
  94    _tnl_install_pipeline( ctx, _tnl_default_pipeline );
  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
 106    /* Hook our functions into exec and compile dispatch tables.
 107     */
 108    _mesa_install_exec_vtxfmt( ctx, &tnl->exec_vtxfmt );
 109
 110
 111    /* Set a few default values in the driver struct.
 112     */
 113    install_driver_callbacks(ctx);
 114    ctx->Driver.NeedFlush = 0;
 115    ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
 116    ctx->Driver.CurrentSavePrimitive = PRIM_UNKNOWN;
 117
 118    tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
 119    tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
 120    tnl->Driver.NotifyMaterialChange = _mesa_validate_all_lighting_tables;
 121
 122    return GL_TRUE;
 123 }
 124
 125
 126 void
 127 _tnl_DestroyContext( GLcontext *ctx )
 128 {
 129    TNLcontext *tnl = TNL_CONTEXT(ctx);
 130
 131    _tnl_array_destroy( ctx );
 132    _tnl_vtx_destroy( ctx );
 133    _tnl_save_destroy( ctx );
 134    _tnl_destroy_pipeline( ctx );
 135    _ae_destroy_context( ctx );
 136
 137    FREE(tnl);
 138    ctx->swtnl_context = 0;
 139 }
 140
 141
 142 void
 143 _tnl_InvalidateState( GLcontext *ctx, GLuint new_state )
 144 {
 145    TNLcontext *tnl = TNL_CONTEXT(ctx);
 146
 147    if (new_state & _NEW_ARRAY) {
 148       tnl->pipeline.run_input_changes |= ctx->Array.NewState; /* overkill */
 149    }
 150
 151    _ae_invalidate_state(ctx, new_state);
 152
 153    tnl->pipeline.run_state_changes |= new_state;
 154    tnl->pipeline.build_state_changes |= (new_state &
 155                                          tnl->pipeline.build_state_trigger);
 156
 157    tnl->vtx.eval.new_state |= new_state;
 158
 159    /* Calculate tnl->render_inputs:
 160     */
 161    if (ctx->Visual.rgbMode) {
 162       tnl->render_inputs = (_TNL_BIT_POS|
 163                             _TNL_BIT_COLOR0|
 164                             (ctx->Texture._EnabledUnits << _TNL_ATTRIB_TEX0));
 165
 166       if (NEED_SECONDARY_COLOR(ctx))
 167          tnl->render_inputs |= _TNL_BIT_COLOR1;
 168    }
 169    else {
 170       tnl->render_inputs |= (_TNL_BIT_POS|_TNL_BIT_INDEX);
 171    }
 172
 173    if (ctx->Fog.Enabled)
 174       tnl->render_inputs |= _TNL_BIT_FOG;
 175
 176    if (ctx->Polygon.FrontMode != GL_FILL ||
 177        ctx->Polygon.BackMode != GL_FILL)
 178       tnl->render_inputs |= _TNL_BIT_EDGEFLAG;
 179
 180    if (ctx->RenderMode == GL_FEEDBACK)
 181       tnl->render_inputs |= _TNL_BIT_TEX0;
 182 }
 183
 184
 185 void
 186 _tnl_wakeup_exec( GLcontext *ctx )
 187 {
 188    TNLcontext *tnl = TNL_CONTEXT(ctx);
 189
 190    install_driver_callbacks(ctx);
 191    ctx->Driver.NeedFlush |= FLUSH_UPDATE_CURRENT;
 192
 193    /* Hook our functions into exec and compile dispatch tables.
 194     */
 195    _mesa_install_exec_vtxfmt( ctx, &tnl->exec_vtxfmt );
 196
 197    /* Call all appropriate driver callbacks to revive state.
 198     */
 199    _tnl_MakeCurrent( ctx, ctx->DrawBuffer, ctx->ReadBuffer );
 200
 201    /* Assume we haven't been getting state updates either:
 202     */
 203    _tnl_InvalidateState( ctx, ~0 );
 204    tnl->pipeline.run_input_changes = ~0;
 205
 206    if (ctx->Light.ColorMaterialEnabled) {
 207       _mesa_update_color_material( ctx,
 208                                    ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 209    }
 210 }
 211
 212
 213 void
 214 _tnl_wakeup_save_exec( GLcontext *ctx )
 215 {
 216    TNLcontext *tnl = TNL_CONTEXT(ctx);
 217
 218    _tnl_wakeup_exec( ctx );
 219    _mesa_install_save_vtxfmt( ctx, &tnl->save_vtxfmt );
 220 }
 221
 222
 223 /**
 224  * Drivers call this function to tell the TCL module whether or not
 225  * it wants Normalized Device Coords (NDC) computed.  I.e. whether
 226  * we should "Divide-by-W".  Software renders will want that.
 227  */
 228 void
 229 _tnl_need_projected_coords( GLcontext *ctx, GLboolean mode )
 230 {
 231    TNLcontext *tnl = TNL_CONTEXT(ctx);
 232    if (tnl->NeedNdcCoords != mode) {
 233       tnl->NeedNdcCoords = mode;
 234       _tnl_InvalidateState( ctx, _NEW_PROJECTION );
 235    }
 236 }
 237
 238 void
 239 _tnl_need_dlist_loopback( GLcontext *ctx, GLboolean mode )
 240 {
 241    TNLcontext *tnl = TNL_CONTEXT(ctx);
 242    tnl->LoopbackDListCassettes = mode;
 243 }
 244
 245 void
 246 _tnl_need_dlist_norm_lengths( GLcontext *ctx, GLboolean mode )
 247 {
 248    TNLcontext *tnl = TNL_CONTEXT(ctx);
 249    tnl->CalcDListNormalLengths = mode;
 250 }
 251
 252 void
 253 _tnl_isolate_materials( GLcontext *ctx, GLboolean mode )
 254 {
 255    TNLcontext *tnl = TNL_CONTEXT(ctx);
 256    tnl->IsolateMaterials = mode;
 257 }