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 "glheader.h"
  30 #include "imports.h"
  31 #include "context.h"
  32 #include "macros.h"
  33 #include "mtypes.h"
  34 #include "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       _tnl_ProgramCacheInit( ctx );
  65       _tnl_install_pipeline( ctx, _tnl_vp_pipeline );
  66    } else {
  67       _tnl_install_pipeline( ctx, _tnl_default_pipeline );
  68    }
  69
  70    tnl->NeedNdcCoords = GL_TRUE;
  71    tnl->AllowVertexFog = GL_TRUE;
  72    tnl->AllowPixelFog = GL_TRUE;
  73
  74    /* Set a few default values in the driver struct.
  75     */
  76    tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
  77    tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
  78    tnl->Driver.NotifyMaterialChange = _mesa_validate_all_lighting_tables;
  79
  80    tnl->nr_blocks = 0;
  81
  82    return GL_TRUE;
  83 }
  84
  85
  86 void
  87 _tnl_DestroyContext( GLcontext *ctx )
  88 {
  89    TNLcontext *tnl = TNL_CONTEXT(ctx);
  90
  91    _tnl_destroy_pipeline( ctx );
  92
  93    if (ctx->VertexProgram._MaintainTnlProgram)
  94       _tnl_ProgramCacheDestroy( ctx );
  95
  96    FREE(tnl);
  97    ctx->swtnl_context = NULL;
  98 }
  99
 100
 101 void
 102 _tnl_InvalidateState( GLcontext *ctx, GLuint new_state )
 103 {
 104    TNLcontext *tnl = TNL_CONTEXT(ctx);
 105
 106    if (new_state & (_NEW_HINT)) {
 107       ASSERT(tnl->AllowVertexFog || tnl->AllowPixelFog);
 108       tnl->_DoVertexFog = (tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 109          || !tnl->AllowPixelFog;
 110    }
 111
 112    tnl->pipeline.new_state |= new_state;
 113
 114    /* Calculate tnl->render_inputs:
 115     */
 116    if (ctx->Visual.rgbMode) {
 117       GLuint i;
 118
 119       RENDERINPUTS_ZERO( tnl->render_inputs_bitset );
 120       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POS );
 121       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR0 );
 122       for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
 123          if (ctx->Texture._EnabledCoordUnits & (1 << i)) {
 124             RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_TEX(i) );
 125          }
 126       }
 127
 128       if (NEED_SECONDARY_COLOR(ctx))
 129          RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR1 );
 130    }
 131    else {
 132       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POS );
 133       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR_INDEX );
 134    }
 135
 136    if (ctx->Fog.Enabled ||
 137        (ctx->FragmentProgram._Current &&
 138         (ctx->FragmentProgram._Current->FogOption != GL_NONE ||
 139          ctx->FragmentProgram._Current->Base.InputsRead & FRAG_BIT_FOGC)))
 140       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_FOG );
 141
 142    if (ctx->Polygon.FrontMode != GL_FILL ||
 143        ctx->Polygon.BackMode != GL_FILL)
 144       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_EDGEFLAG );
 145
 146    if (ctx->RenderMode == GL_FEEDBACK)
 147       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_TEX0 );
 148
 149    if (ctx->Point._Attenuated ||
 150        (ctx->VertexProgram._Enabled && ctx->VertexProgram.PointSizeEnabled))
 151       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POINTSIZE );
 152
 153 #if 1 /* XXX NEW_SLANG */
 154    RENDERINPUTS_SET_RANGE( tnl->render_inputs_bitset,
 155                            _TNL_FIRST_GENERIC, _TNL_LAST_GENERIC );
 156 #else
 157    if (ctx->ShaderObjects._VertexShaderPresent || ctx->ShaderObjects._FragmentShaderPresent)
 158       RENDERINPUTS_SET_RANGE( tnl->render_inputs_bitset, _TNL_FIRST_GENERIC, _TNL_LAST_GENERIC );
 159 #endif
 160 }
 161
 162
 163 void
 164 _tnl_wakeup( GLcontext *ctx )
 165 {
 166    /* Assume we haven't been getting state updates either:
 167     */
 168    _tnl_InvalidateState( ctx, ~0 );
 169
 170 #if 0
 171    if (ctx->Light.ColorMaterialEnabled) {
 172       _mesa_update_color_material( ctx,
 173                                    ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 174    }
 175 #endif
 176 }
 177
 178
 179
 180
 181 /**
 182  * Drivers call this function to tell the TCL module whether or not
 183  * it wants Normalized Device Coords (NDC) computed.  I.e. whether
 184  * we should "Divide-by-W".  Software renders will want that.
 185  */
 186 void
 187 _tnl_need_projected_coords( GLcontext *ctx, GLboolean mode )
 188 {
 189    TNLcontext *tnl = TNL_CONTEXT(ctx);
 190    tnl->NeedNdcCoords = mode;
 191 }
 192
 193 void
 194 _tnl_allow_vertex_fog( GLcontext *ctx, GLboolean value )
 195 {
 196    TNLcontext *tnl = TNL_CONTEXT(ctx);
 197    tnl->AllowVertexFog = value;
 198    tnl->_DoVertexFog = (tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 199       || !tnl->AllowPixelFog;
 200
 201 }
 202
 203 void
 204 _tnl_allow_pixel_fog( GLcontext *ctx, GLboolean value )
 205 {
 206    TNLcontext *tnl = TNL_CONTEXT(ctx);
 207    tnl->AllowPixelFog = value;
 208    tnl->_DoVertexFog = (tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 209       || !tnl->AllowPixelFog;
 210 }
 211