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 #include "math/m_translate.h"
  36 #include "math/m_xform.h"
  37 #include "main/state.h"
  38
  39 #include "tnl.h"
  40 #include "t_context.h"
  41 #include "t_pipeline.h"
  42
  43 #include "vbo/vbo.h"
  44
  45 GLboolean
  46 _tnl_CreateContext( struct gl_context *ctx )
  47 {
  48    TNLcontext *tnl;
  49
  50    /* Create the TNLcontext structure
  51     */
  52    ctx->swtnl_context = tnl = (TNLcontext *) CALLOC( sizeof(TNLcontext) );
  53
  54    if (!tnl) {
  55       return GL_FALSE;
  56    }
  57
  58    /* Initialize the VB.
  59     */
  60    tnl->vb.Size = ctx->Const.MaxArrayLockSize + MAX_CLIPPED_VERTICES;
  61
  62
  63    /* Initialize tnl state.
  64     */
  65    if (ctx->VertexProgram._MaintainTnlProgram) {
  66       _tnl_install_pipeline( ctx, _tnl_vp_pipeline );
  67    } else {
  68       _tnl_install_pipeline( ctx, _tnl_default_pipeline );
  69    }
  70
  71    tnl->NeedNdcCoords = GL_TRUE;
  72    tnl->AllowVertexFog = GL_TRUE;
  73    tnl->AllowPixelFog = GL_TRUE;
  74
  75    /* Set a few default values in the driver struct.
  76     */
  77    tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
  78    tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
  79    tnl->Driver.NotifyMaterialChange = _mesa_validate_all_lighting_tables;
  80
  81    tnl->nr_blocks = 0;
  82
  83    /* plug in the VBO drawing function */
  84    vbo_set_draw_func(ctx, _tnl_vbo_draw_prims);
  85
  86    _math_init_transformation();
  87    _math_init_translate();
  88
  89    return GL_TRUE;
  90 }
  91
  92
  93 void
  94 _tnl_DestroyContext( struct gl_context *ctx )
  95 {
  96    TNLcontext *tnl = TNL_CONTEXT(ctx);
  97
  98    _tnl_destroy_pipeline( ctx );
  99
 100    FREE(tnl);
 101    ctx->swtnl_context = NULL;
 102 }
 103
 104
 105 void
 106 _tnl_InvalidateState( struct gl_context *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    GLuint i;
 112
 113    if (new_state & (_NEW_HINT | _NEW_PROGRAM)) {
 114       ASSERT(tnl->AllowVertexFog || tnl->AllowPixelFog);
 115       tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 116          || !tnl->AllowPixelFog) && !fp;
 117    }
 118
 119    tnl->pipeline.new_state |= new_state;
 120
 121    /* Calculate tnl->render_inputs.  This bitmask indicates which vertex
 122     * attributes need to be emitted to the rasterizer.
 123     */
 124    RENDERINPUTS_ZERO( tnl->render_inputs_bitset );
 125    RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POS );
 126
 127    if (!fp || (fp->Base.InputsRead & FRAG_BIT_COL0)) {
 128      RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR0 );
 129    }
 130
 131    if (_mesa_need_secondary_color(ctx))
 132      RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR1 );
 133
 134    for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
 135      if (ctx->Texture._EnabledCoordUnits & (1 << i) ||
 136          (fp && fp->Base.InputsRead & FRAG_BIT_TEX(i))) {
 137        RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_TEX(i) );
 138      }
 139    }
 140
 141    if (ctx->Fog.Enabled
 142        || (fp != NULL && (fp->Base.InputsRead & FRAG_BIT_FOGC) != 0)) {
 143       /* Either fixed-function fog or a fragment program needs fog coord.
 144        */
 145       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_FOG );
 146    }
 147
 148    if (ctx->Polygon.FrontMode != GL_FILL ||
 149        ctx->Polygon.BackMode != GL_FILL)
 150       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_EDGEFLAG );
 151
 152    if (ctx->RenderMode == GL_FEEDBACK)
 153       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_TEX0 );
 154
 155    if (ctx->Point._Attenuated ||
 156        (ctx->VertexProgram._Enabled && ctx->VertexProgram.PointSizeEnabled))
 157       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POINTSIZE );
 158
 159    /* check for varying vars which are written by the vertex program */
 160    if (vp) {
 161       GLuint i;
 162       for (i = 0; i < MAX_VARYING; i++) {
 163          if (vp->Base.OutputsWritten & BITFIELD64_BIT(VERT_RESULT_VAR0 + i)) {
 164             RENDERINPUTS_SET(tnl->render_inputs_bitset,
 165                              _TNL_ATTRIB_GENERIC(i));
 166          }
 167       }
 168    }
 169 }
 170
 171
 172 void
 173 _tnl_wakeup( struct gl_context *ctx )
 174 {
 175    /* Assume we haven't been getting state updates either:
 176     */
 177    _tnl_InvalidateState( ctx, ~0 );
 178
 179 #if 0
 180    if (ctx->Light.ColorMaterialEnabled) {
 181       _mesa_update_color_material( ctx,
 182                                    ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 183    }
 184 #endif
 185 }
 186
 187
 188
 189
 190 /**
 191  * Drivers call this function to tell the TCL module whether or not
 192  * it wants Normalized Device Coords (NDC) computed.  I.e. whether
 193  * we should "Divide-by-W".  Software renders will want that.
 194  */
 195 void
 196 _tnl_need_projected_coords( struct gl_context *ctx, GLboolean mode )
 197 {
 198    TNLcontext *tnl = TNL_CONTEXT(ctx);
 199    tnl->NeedNdcCoords = mode;
 200 }
 201
 202 void
 203 _tnl_allow_vertex_fog( struct gl_context *ctx, GLboolean value )
 204 {
 205    TNLcontext *tnl = TNL_CONTEXT(ctx);
 206    tnl->AllowVertexFog = value;
 207    tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 208       || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
 209
 210 }
 211
 212 void
 213 _tnl_allow_pixel_fog( struct gl_context *ctx, GLboolean value )
 214 {
 215    TNLcontext *tnl = TNL_CONTEXT(ctx);
 216    tnl->AllowPixelFog = value;
 217    tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 218       || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
 219 }
 220