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    const struct gl_vertex_program *vp = ctx->VertexProgram._Current;
 106    const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
 107
 108    if (new_state & (_NEW_HINT)) {
 109       ASSERT(tnl->AllowVertexFog || tnl->AllowPixelFog);
 110       tnl->_DoVertexFog = (tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 111          || !tnl->AllowPixelFog;
 112    }
 113
 114    tnl->pipeline.new_state |= new_state;
 115
 116    /* Calculate tnl->render_inputs:
 117     */
 118    if (ctx->Visual.rgbMode) {
 119       GLuint i;
 120
 121       RENDERINPUTS_ZERO( tnl->render_inputs_bitset );
 122       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POS );
 123       if (!fp || fp->Base.InputsRead & FRAG_BIT_COL0) {
 124          RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR0 );
 125       }
 126       for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
 127          if (ctx->Texture._EnabledCoordUnits & (1 << i)) {
 128             RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_TEX(i) );
 129          }
 130       }
 131
 132       if (NEED_SECONDARY_COLOR(ctx))
 133          RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR1 );
 134    }
 135    else {
 136       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POS );
 137       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR_INDEX );
 138    }
 139
 140    if (ctx->Fog.Enabled ||
 141        (ctx->FragmentProgram._Current &&
 142         (ctx->FragmentProgram._Current->FogOption != GL_NONE ||
 143          ctx->FragmentProgram._Current->Base.InputsRead & FRAG_BIT_FOGC)))
 144       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_FOG );
 145
 146    if (ctx->Polygon.FrontMode != GL_FILL ||
 147        ctx->Polygon.BackMode != GL_FILL)
 148       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_EDGEFLAG );
 149
 150    if (ctx->RenderMode == GL_FEEDBACK)
 151       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_TEX0 );
 152
 153    if (ctx->Point._Attenuated ||
 154        (ctx->VertexProgram._Enabled && ctx->VertexProgram.PointSizeEnabled))
 155       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POINTSIZE );
 156
 157    /* check for varying vars which are written by the vertex program */
 158    if (vp) {
 159       GLuint i;
 160       for (i = 0; i < MAX_VARYING; i++) {
 161          if (vp->Base.OutputsWritten & (1 << (VERT_RESULT_VAR0 + i))) {
 162             RENDERINPUTS_SET(tnl->render_inputs_bitset,
 163                              _TNL_ATTRIB_GENERIC(i));
 164          }
 165       }
 166    }
 167 }
 168
 169
 170 void
 171 _tnl_wakeup( GLcontext *ctx )
 172 {
 173    /* Assume we haven't been getting state updates either:
 174     */
 175    _tnl_InvalidateState( ctx, ~0 );
 176
 177 #if 0
 178    if (ctx->Light.ColorMaterialEnabled) {
 179       _mesa_update_color_material( ctx,
 180                                    ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 181    }
 182 #endif
 183 }
 184
 185
 186
 187
 188 /**
 189  * Drivers call this function to tell the TCL module whether or not
 190  * it wants Normalized Device Coords (NDC) computed.  I.e. whether
 191  * we should "Divide-by-W".  Software renders will want that.
 192  */
 193 void
 194 _tnl_need_projected_coords( GLcontext *ctx, GLboolean mode )
 195 {
 196    TNLcontext *tnl = TNL_CONTEXT(ctx);
 197    tnl->NeedNdcCoords = mode;
 198 }
 199
 200 void
 201 _tnl_allow_vertex_fog( GLcontext *ctx, GLboolean value )
 202 {
 203    TNLcontext *tnl = TNL_CONTEXT(ctx);
 204    tnl->AllowVertexFog = value;
 205    tnl->_DoVertexFog = (tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 206       || !tnl->AllowPixelFog;
 207
 208 }
 209
 210 void
 211 _tnl_allow_pixel_fog( GLcontext *ctx, GLboolean value )
 212 {
 213    TNLcontext *tnl = TNL_CONTEXT(ctx);
 214    tnl->AllowPixelFog = value;
 215    tnl->_DoVertexFog = (tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 216       || !tnl->AllowPixelFog;
 217 }
 218