src/mesa/tnl/t_context.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.3
   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 void
  51 _tnl_MakeCurrent( GLcontext *ctx,
  52                   GLframebuffer *drawBuffer,
  53                   GLframebuffer *readBuffer )
  54 {
  55    (void) ctx; (void) drawBuffer; (void) readBuffer;
  56 }
  57
  58
  59 static void
  60 install_driver_callbacks( GLcontext *ctx )
  61 {
  62    ctx->Driver.NewList = _tnl_NewList;
  63    ctx->Driver.EndList = _tnl_EndList;
  64    ctx->Driver.FlushVertices = _tnl_FlushVertices;
  65    ctx->Driver.SaveFlushVertices = _tnl_SaveFlushVertices;
  66    ctx->Driver.MakeCurrent = _tnl_MakeCurrent;
  67    ctx->Driver.BeginCallList = _tnl_BeginCallList;
  68    ctx->Driver.EndCallList = _tnl_EndCallList;
  69 }
  70
  71
  72
  73 GLboolean
  74 _tnl_CreateContext( GLcontext *ctx )
  75 {
  76    TNLcontext *tnl;
  77
  78    /* Create the TNLcontext structure
  79     */
  80    ctx->swtnl_context = tnl = (TNLcontext *) CALLOC( sizeof(TNLcontext) );
  81
  82    if (!tnl) {
  83       return GL_FALSE;
  84    }
  85
  86    if (getenv("MESA_CODEGEN"))
  87       tnl->AllowCodegen = GL_TRUE;
  88
  89    /* Initialize the VB.
  90     */
  91    tnl->vb.Size = ctx->Const.MaxArrayLockSize + MAX_CLIPPED_VERTICES;
  92
  93
  94    /* Initialize tnl state and tnl->vtxfmt.
  95     */
  96    _tnl_save_init( ctx );
  97    _tnl_array_init( ctx );
  98    _tnl_vtx_init( ctx );
  99
 100    if (ctx->_MaintainTnlProgram)
 101       _tnl_install_pipeline( ctx, _tnl_vp_pipeline );
 102    else
 103       _tnl_install_pipeline( ctx, _tnl_default_pipeline );
 104
 105    /* Initialize the arrayelt helper
 106     */
 107    if (!_ae_create_context( ctx ))
 108       return GL_FALSE;
 109
 110
 111    tnl->NeedNdcCoords = GL_TRUE;
 112    tnl->LoopbackDListCassettes = GL_FALSE;
 113    tnl->CalcDListNormalLengths = GL_TRUE;
 114    tnl->AllowVertexFog = GL_TRUE;
 115    tnl->AllowPixelFog = GL_TRUE;
 116
 117    /* Hook our functions into exec and compile dispatch tables.
 118     */
 119    _mesa_install_exec_vtxfmt( ctx, &tnl->exec_vtxfmt );
 120
 121
 122    /* Set a few default values in the driver struct.
 123     */
 124    install_driver_callbacks(ctx);
 125    ctx->Driver.NeedFlush = 0;
 126    ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
 127    ctx->Driver.CurrentSavePrimitive = PRIM_UNKNOWN;
 128
 129    tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
 130    tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
 131    tnl->Driver.NotifyMaterialChange = _mesa_validate_all_lighting_tables;
 132
 133    return GL_TRUE;
 134 }
 135
 136
 137 void
 138 _tnl_DestroyContext( GLcontext *ctx )
 139 {
 140    TNLcontext *tnl = TNL_CONTEXT(ctx);
 141
 142    _tnl_array_destroy( ctx );
 143    _tnl_vtx_destroy( ctx );
 144    _tnl_save_destroy( ctx );
 145    _tnl_destroy_pipeline( ctx );
 146    _ae_destroy_context( ctx );
 147
 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    /* Call all appropriate driver callbacks to revive state.
 216     */
 217    _tnl_MakeCurrent( ctx, ctx->DrawBuffer, ctx->ReadBuffer );
 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 }
 282
 283 void
 284 _tnl_allow_pixel_fog( GLcontext *ctx, GLboolean value )
 285 {
 286    TNLcontext *tnl = TNL_CONTEXT(ctx);
 287    tnl->AllowPixelFog = value;
 288 }
 289