src/mesa/tnl/t_context.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.2
   4  *
   5  * Copyright (C) 1999-2008  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       _tnl_install_pipeline( ctx, _tnl_vp_pipeline );
  65    } else {
  66       _tnl_install_pipeline( ctx, _tnl_default_pipeline );
  67    }
  68
  69    tnl->NeedNdcCoords = GL_TRUE;
  70    tnl->AllowVertexFog = GL_TRUE;
  71    tnl->AllowPixelFog = GL_TRUE;
  72
  73    /* Set a few default values in the driver struct.
  74     */
  75    tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
  76    tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
  77    tnl->Driver.NotifyMaterialChange = _mesa_validate_all_lighting_tables;
  78
  79    tnl->nr_blocks = 0;
  80
  81    return GL_TRUE;
  82 }
  83
  84
  85 void
  86 _tnl_DestroyContext( GLcontext *ctx )
  87 {
  88    TNLcontext *tnl = TNL_CONTEXT(ctx);
  89
  90    _tnl_destroy_pipeline( ctx );
  91
  92    FREE(tnl);
  93    ctx->swtnl_context = NULL;
  94 }
  95
  96
  97 void
  98 _tnl_InvalidateState( GLcontext *ctx, GLuint new_state )
  99 {
 100    TNLcontext *tnl = TNL_CONTEXT(ctx);
 101    const struct gl_vertex_program *vp = ctx->VertexProgram._Current;
 102    const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
 103
 104    if (new_state & (_NEW_HINT | _NEW_PROGRAM)) {
 105       ASSERT(tnl->AllowVertexFog || tnl->AllowPixelFog);
 106       tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 107          || !tnl->AllowPixelFog) && !fp;
 108    }
 109
 110    tnl->pipeline.new_state |= new_state;
 111
 112    /* Calculate tnl->render_inputs.  This bitmask indicates which vertex
 113     * attributes need to be emitted to the rasterizer.
 114     */
 115    if (ctx->Visual.rgbMode) {
 116       GLuint i;
 117
 118       RENDERINPUTS_ZERO( tnl->render_inputs_bitset );
 119       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POS );
 120
 121       if (!fp || (fp->Base.InputsRead & FRAG_BIT_COL0)) {
 122          RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR0 );
 123       }
 124
 125       if (NEED_SECONDARY_COLOR(ctx))
 126          RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR1 );
 127
 128       for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
 129          if (ctx->Texture._EnabledCoordUnits & (1 << i) ||
 130              (fp && fp->Base.InputsRead & FRAG_BIT_TEX(i))) {
 131             RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_TEX(i) );
 132          }
 133       }
 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       /* fixed-function fog */
 142       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_FOG );
 143    }
 144    else if (ctx->FragmentProgram._Current) {
 145       struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
 146       if (fp) {
 147          if (fp->FogOption != GL_NONE || (fp->Base.InputsRead & FRAG_BIT_FOGC)) {
 148             /* fragment program needs fog coord */
 149             RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_FOG );
 150          }
 151       }
 152    }
 153
 154    if (ctx->Polygon.FrontMode != GL_FILL ||
 155        ctx->Polygon.BackMode != GL_FILL)
 156       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_EDGEFLAG );
 157
 158    if (ctx->RenderMode == GL_FEEDBACK)
 159       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_TEX0 );
 160
 161    if (ctx->Point._Attenuated ||
 162        (ctx->VertexProgram._Enabled && ctx->VertexProgram.PointSizeEnabled))
 163       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POINTSIZE );
 164
 165    /* check for varying vars which are written by the vertex program */
 166    if (vp) {
 167       GLuint i;
 168       for (i = 0; i < MAX_VARYING; i++) {
 169          if (vp->Base.OutputsWritten & (1 << (VERT_RESULT_VAR0 + i))) {
 170             RENDERINPUTS_SET(tnl->render_inputs_bitset,
 171                              _TNL_ATTRIB_GENERIC(i));
 172          }
 173       }
 174    }
 175 }
 176
 177
 178 void
 179 _tnl_wakeup( GLcontext *ctx )
 180 {
 181    /* Assume we haven't been getting state updates either:
 182     */
 183    _tnl_InvalidateState( ctx, ~0 );
 184
 185 #if 0
 186    if (ctx->Light.ColorMaterialEnabled) {
 187       _mesa_update_color_material( ctx,
 188                                    ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 189    }
 190 #endif
 191 }
 192
 193
 194
 195
 196 /**
 197  * Drivers call this function to tell the TCL module whether or not
 198  * it wants Normalized Device Coords (NDC) computed.  I.e. whether
 199  * we should "Divide-by-W".  Software renders will want that.
 200  */
 201 void
 202 _tnl_need_projected_coords( GLcontext *ctx, GLboolean mode )
 203 {
 204    TNLcontext *tnl = TNL_CONTEXT(ctx);
 205    tnl->NeedNdcCoords = mode;
 206 }
 207
 208 void
 209 _tnl_allow_vertex_fog( GLcontext *ctx, GLboolean value )
 210 {
 211    TNLcontext *tnl = TNL_CONTEXT(ctx);
 212    tnl->AllowVertexFog = value;
 213    tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 214       || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
 215
 216 }
 217
 218 void
 219 _tnl_allow_pixel_fog( GLcontext *ctx, GLboolean value )
 220 {
 221    TNLcontext *tnl = TNL_CONTEXT(ctx);
 222    tnl->AllowPixelFog = value;
 223    tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 224       || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
 225 }
 226