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 "main/glheader.h"
  30 #include "main/imports.h"
  31 #include "main/context.h"
  32 #include "main/macros.h"
  33 #include "main/mtypes.h"
  34 #include "main/light.h"
  35
  36 #include "tnl.h"
  37 #include "t_context.h"
  38 #include "t_pipeline.h"
  39 #include "t_vp_build.h"
  40
  41 #include "vbo/vbo.h"
  42
  43 GLboolean
  44 _tnl_CreateContext( GLcontext *ctx )
  45 {
  46    TNLcontext *tnl;
  47
  48    /* Create the TNLcontext structure
  49     */
  50    ctx->swtnl_context = tnl = (TNLcontext *) CALLOC( sizeof(TNLcontext) );
  51
  52    if (!tnl) {
  53       return GL_FALSE;
  54    }
  55
  56    /* Initialize the VB.
  57     */
  58    tnl->vb.Size = ctx->Const.MaxArrayLockSize + MAX_CLIPPED_VERTICES;
  59
  60
  61    /* Initialize tnl state.
  62     */
  63    if (ctx->VertexProgram._MaintainTnlProgram) {
  64 #if 0
  65       _tnl_ProgramCacheInit( ctx );
  66 #endif
  67       _tnl_install_pipeline( ctx, _tnl_vp_pipeline );
  68    } else {
  69       _tnl_install_pipeline( ctx, _tnl_default_pipeline );
  70    }
  71
  72    tnl->NeedNdcCoords = GL_TRUE;
  73    tnl->AllowVertexFog = GL_TRUE;
  74    tnl->AllowPixelFog = GL_TRUE;
  75
  76    /* Set a few default values in the driver struct.
  77     */
  78    tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
  79    tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
  80    tnl->Driver.NotifyMaterialChange = _mesa_validate_all_lighting_tables;
  81
  82    tnl->nr_blocks = 0;
  83
  84    return GL_TRUE;
  85 }
  86
  87
  88 void
  89 _tnl_DestroyContext( GLcontext *ctx )
  90 {
  91    TNLcontext *tnl = TNL_CONTEXT(ctx);
  92
  93    _tnl_destroy_pipeline( ctx );
  94
  95 #if 0
  96    if (ctx->VertexProgram._MaintainTnlProgram)
  97       _tnl_ProgramCacheDestroy( ctx );
  98 #endif
  99
 100    FREE(tnl);
 101    ctx->swtnl_context = NULL;
 102 }
 103
 104
 105 void
 106 _tnl_InvalidateState( GLcontext *ctx, GLuint new_state )
 107 {
 108    TNLcontext *tnl = TNL_CONTEXT(ctx);
 109    const struct gl_vertex_program *vp = ctx->VertexProgram._Current;
 110    const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
 111
 112    if (new_state & (_NEW_HINT)) {
 113       ASSERT(tnl->AllowVertexFog || tnl->AllowPixelFog);
 114       tnl->_DoVertexFog = (tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 115          || !tnl->AllowPixelFog;
 116    }
 117
 118    tnl->pipeline.new_state |= new_state;
 119
 120    /* Calculate tnl->render_inputs:
 121     */
 122    if (ctx->Visual.rgbMode) {
 123       GLuint i;
 124
 125       RENDERINPUTS_ZERO( tnl->render_inputs_bitset );
 126       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POS );
 127       if (!fp || (fp->Base.InputsRead & FRAG_BIT_COL0)) {
 128          RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR0 );
 129       }
 130       for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
 131          if (ctx->Texture._EnabledCoordUnits & (1 << i)) {
 132             RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_TEX(i) );
 133          }
 134       }
 135
 136       if (NEED_SECONDARY_COLOR(ctx))
 137          RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR1 );
 138    }
 139    else {
 140       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POS );
 141       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR_INDEX );
 142    }
 143
 144    if (ctx->Fog.Enabled ||
 145        ((ctx->FragmentProgram._Active || ctx->FragmentProgram._Current) &&
 146         (ctx->FragmentProgram._Current->FogOption != GL_NONE ||
 147          (ctx->FragmentProgram._Current->Base.InputsRead & FRAG_BIT_FOGC))))
 148       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_FOG );
 149
 150    if (ctx->Polygon.FrontMode != GL_FILL ||
 151        ctx->Polygon.BackMode != GL_FILL)
 152       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_EDGEFLAG );
 153
 154    if (ctx->RenderMode == GL_FEEDBACK)
 155       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_TEX0 );
 156
 157    if (ctx->Point._Attenuated ||
 158        (ctx->VertexProgram._Enabled && ctx->VertexProgram.PointSizeEnabled))
 159       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POINTSIZE );
 160
 161    /* check for varying vars which are written by the vertex program */
 162    if (vp) {
 163       GLuint i;
 164       for (i = 0; i < MAX_VARYING; i++) {
 165          if (vp->Base.OutputsWritten & (1 << (VERT_RESULT_VAR0 + i))) {
 166             RENDERINPUTS_SET(tnl->render_inputs_bitset,
 167                              _TNL_ATTRIB_GENERIC(i));
 168          }
 169       }
 170    }
 171 }
 172
 173
 174 void
 175 _tnl_wakeup( GLcontext *ctx )
 176 {
 177    /* Assume we haven't been getting state updates either:
 178     */
 179    _tnl_InvalidateState( ctx, ~0 );
 180
 181 #if 0
 182    if (ctx->Light.ColorMaterialEnabled) {
 183       _mesa_update_color_material( ctx,
 184                                    ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 185    }
 186 #endif
 187 }
 188
 189
 190
 191
 192 /**
 193  * Drivers call this function to tell the TCL module whether or not
 194  * it wants Normalized Device Coords (NDC) computed.  I.e. whether
 195  * we should "Divide-by-W".  Software renders will want that.
 196  */
 197 void
 198 _tnl_need_projected_coords( GLcontext *ctx, GLboolean mode )
 199 {
 200    TNLcontext *tnl = TNL_CONTEXT(ctx);
 201    tnl->NeedNdcCoords = mode;
 202 }
 203
 204 void
 205 _tnl_allow_vertex_fog( GLcontext *ctx, GLboolean value )
 206 {
 207    TNLcontext *tnl = TNL_CONTEXT(ctx);
 208    tnl->AllowVertexFog = value;
 209    tnl->_DoVertexFog = (tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 210       || !tnl->AllowPixelFog;
 211
 212 }
 213
 214 void
 215 _tnl_allow_pixel_fog( GLcontext *ctx, GLboolean value )
 216 {
 217    TNLcontext *tnl = TNL_CONTEXT(ctx);
 218    tnl->AllowPixelFog = value;
 219    tnl->_DoVertexFog = (tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 220       || !tnl->AllowPixelFog;
 221 }
 222