src/mesa/tnl/t_context.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.1
   4  *
   5  * Copyright (C) 1999-2004  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    (void) ctx; (void) drawBuffer; (void) readBuffer;
  55 }
  56
  57
  58 static void
  59 install_driver_callbacks( GLcontext *ctx )
  60 {
  61    ctx->Driver.NewList = _tnl_NewList;
  62    ctx->Driver.EndList = _tnl_EndList;
  63    ctx->Driver.FlushVertices = _tnl_FlushVertices;
  64    ctx->Driver.SaveFlushVertices = _tnl_SaveFlushVertices;
  65    ctx->Driver.MakeCurrent = _tnl_MakeCurrent;
  66    ctx->Driver.BeginCallList = _tnl_BeginCallList;
  67    ctx->Driver.EndCallList = _tnl_EndCallList;
  68 }
  69
  70
  71
  72 GLboolean
  73 _tnl_CreateContext( GLcontext *ctx )
  74 {
  75    TNLcontext *tnl;
  76
  77    /* Create the TNLcontext structure
  78     */
  79    ctx->swtnl_context = tnl = (TNLcontext *) CALLOC( sizeof(TNLcontext) );
  80
  81    if (!tnl) {
  82       return GL_FALSE;
  83    }
  84
  85    if (getenv("MESA_CODEGEN"))
  86       tnl->AllowCodegen = GL_TRUE;
  87
  88    /* Initialize the VB.
  89     */
  90    tnl->vb.Size = ctx->Const.MaxArrayLockSize + MAX_CLIPPED_VERTICES;
  91
  92
  93    /* Initialize tnl state and tnl->vtxfmt.
  94     */
  95    _tnl_save_init( ctx );
  96    _tnl_array_init( ctx );
  97    _tnl_vtx_init( ctx );
  98    _tnl_install_pipeline( ctx, _tnl_default_pipeline );
  99
 100    /* Initialize the arrayelt helper
 101     */
 102    if (!_ae_create_context( ctx ))
 103       return GL_FALSE;
 104
 105
 106    tnl->NeedNdcCoords = GL_TRUE;
 107    tnl->LoopbackDListCassettes = GL_FALSE;
 108    tnl->CalcDListNormalLengths = GL_TRUE;
 109    tnl->AllowVertexFog = GL_TRUE;
 110    tnl->AllowPixelFog = GL_TRUE;
 111
 112    /* Hook our functions into exec and compile dispatch tables.
 113     */
 114    _mesa_install_exec_vtxfmt( ctx, &tnl->exec_vtxfmt );
 115
 116
 117    /* Set a few default values in the driver struct.
 118     */
 119    install_driver_callbacks(ctx);
 120    ctx->Driver.NeedFlush = 0;
 121    ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
 122    ctx->Driver.CurrentSavePrimitive = PRIM_UNKNOWN;
 123
 124    tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
 125    tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
 126    tnl->Driver.NotifyMaterialChange = _mesa_validate_all_lighting_tables;
 127
 128    return GL_TRUE;
 129 }
 130
 131
 132 void
 133 _tnl_DestroyContext( GLcontext *ctx )
 134 {
 135    TNLcontext *tnl = TNL_CONTEXT(ctx);
 136
 137    _tnl_array_destroy( ctx );
 138    _tnl_vtx_destroy( ctx );
 139    _tnl_save_destroy( ctx );
 140    _tnl_destroy_pipeline( ctx );
 141    _ae_destroy_context( ctx );
 142
 143    FREE(tnl);
 144    ctx->swtnl_context = NULL;
 145 }
 146
 147
 148 void
 149 _tnl_InvalidateState( GLcontext *ctx, GLuint new_state )
 150 {
 151    TNLcontext *tnl = TNL_CONTEXT(ctx);
 152
 153    if (new_state & (_NEW_HINT)) {
 154       ASSERT(tnl->AllowVertexFog || tnl->AllowPixelFog);
 155       tnl->_DoVertexFog = (tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 156          || !tnl->AllowPixelFog;
 157    }
 158
 159    if (new_state & _NEW_ARRAY) {
 160       tnl->pipeline.run_input_changes |= ctx->Array.NewState; /* overkill */
 161    }
 162
 163    _ae_invalidate_state(ctx, new_state);
 164
 165    tnl->pipeline.run_state_changes |= new_state;
 166    tnl->pipeline.build_state_changes |= (new_state &
 167                                          tnl->pipeline.build_state_trigger);
 168
 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       tnl->render_inputs |= _TNL_BIT_FOG;
 187
 188    if (ctx->Polygon.FrontMode != GL_FILL ||
 189        ctx->Polygon.BackMode != GL_FILL)
 190       tnl->render_inputs |= _TNL_BIT_EDGEFLAG;
 191
 192    if (ctx->RenderMode == GL_FEEDBACK)
 193       tnl->render_inputs |= _TNL_BIT_TEX0;
 194
 195    if (ctx->Point._Attenuated ||
 196        (ctx->VertexProgram._Enabled && ctx->VertexProgram.PointSizeEnabled))
 197       tnl->render_inputs |= _TNL_BIT_POINTSIZE;
 198 }
 199
 200
 201 void
 202 _tnl_wakeup_exec( GLcontext *ctx )
 203 {
 204    TNLcontext *tnl = TNL_CONTEXT(ctx);
 205
 206    install_driver_callbacks(ctx);
 207    ctx->Driver.NeedFlush |= FLUSH_UPDATE_CURRENT;
 208
 209    /* Hook our functions into exec and compile dispatch tables.
 210     */
 211    _mesa_install_exec_vtxfmt( ctx, &tnl->exec_vtxfmt );
 212
 213    /* Call all appropriate driver callbacks to revive state.
 214     */
 215    _tnl_MakeCurrent( ctx, ctx->DrawBuffer, ctx->ReadBuffer );
 216
 217    /* Assume we haven't been getting state updates either:
 218     */
 219    _tnl_InvalidateState( ctx, ~0 );
 220    tnl->pipeline.run_input_changes = ~0;
 221
 222    if (ctx->Light.ColorMaterialEnabled) {
 223       _mesa_update_color_material( ctx,
 224                                    ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 225    }
 226 }
 227
 228
 229 void
 230 _tnl_wakeup_save_exec( GLcontext *ctx )
 231 {
 232    TNLcontext *tnl = TNL_CONTEXT(ctx);
 233
 234    _tnl_wakeup_exec( ctx );
 235    _mesa_install_save_vtxfmt( ctx, &tnl->save_vtxfmt );
 236 }
 237
 238
 239 /**
 240  * Drivers call this function to tell the TCL module whether or not
 241  * it wants Normalized Device Coords (NDC) computed.  I.e. whether
 242  * we should "Divide-by-W".  Software renders will want that.
 243  */
 244 void
 245 _tnl_need_projected_coords( GLcontext *ctx, GLboolean mode )
 246 {
 247    TNLcontext *tnl = TNL_CONTEXT(ctx);
 248    if (tnl->NeedNdcCoords != mode) {
 249       tnl->NeedNdcCoords = mode;
 250       _tnl_InvalidateState( ctx, _NEW_PROJECTION );
 251    }
 252 }
 253
 254 void
 255 _tnl_need_dlist_loopback( GLcontext *ctx, GLboolean mode )
 256 {
 257    TNLcontext *tnl = TNL_CONTEXT(ctx);
 258    tnl->LoopbackDListCassettes = mode;
 259 }
 260
 261 void
 262 _tnl_need_dlist_norm_lengths( GLcontext *ctx, GLboolean mode )
 263 {
 264    TNLcontext *tnl = TNL_CONTEXT(ctx);
 265    tnl->CalcDListNormalLengths = mode;
 266 }
 267
 268 void
 269 _tnl_isolate_materials( GLcontext *ctx, GLboolean mode )
 270 {
 271    TNLcontext *tnl = TNL_CONTEXT(ctx);
 272    tnl->IsolateMaterials = mode;
 273 }
 274
 275 void
 276 _tnl_allow_vertex_fog( GLcontext *ctx, GLboolean value )
 277 {
 278    TNLcontext *tnl = TNL_CONTEXT(ctx);
 279    tnl->AllowVertexFog = value;
 280 }
 281
 282 void
 283 _tnl_allow_pixel_fog( GLcontext *ctx, GLboolean value )
 284 {
 285    TNLcontext *tnl = TNL_CONTEXT(ctx);
 286    tnl->AllowPixelFog = value;
 287 }
 288