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
  38 #include "tnl.h"
  39 #include "t_context.h"
  40 #include "t_pipeline.h"
  41
  42 #include "vbo/vbo.h"
  43
  44 GLboolean
  45 _tnl_CreateContext( GLcontext *ctx )
  46 {
  47    TNLcontext *tnl;
  48
  49    /* Create the TNLcontext structure
  50     */
  51    ctx->swtnl_context = tnl = (TNLcontext *) CALLOC( sizeof(TNLcontext) );
  52
  53    if (!tnl) {
  54       return GL_FALSE;
  55    }
  56
  57    /* Initialize the VB.
  58     */
  59    tnl->vb.Size = ctx->Const.MaxArrayLockSize + MAX_CLIPPED_VERTICES;
  60
  61
  62    /* Initialize tnl state.
  63     */
  64    if (ctx->VertexProgram._MaintainTnlProgram) {
  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    /* plug in the VBO drawing function */
  83    vbo_set_draw_func(ctx, _tnl_vbo_draw_prims);
  84
  85    _math_init_transformation();
  86    _math_init_translate();
  87
  88    return GL_TRUE;
  89 }
  90
  91
  92 void
  93 _tnl_DestroyContext( GLcontext *ctx )
  94 {
  95    TNLcontext *tnl = TNL_CONTEXT(ctx);
  96
  97    _tnl_destroy_pipeline( ctx );
  98
  99    FREE(tnl);
 100    ctx->swtnl_context = NULL;
 101 }
 102
 103
 104 void
 105 _tnl_InvalidateState( GLcontext *ctx, GLuint new_state )
 106 {
 107    TNLcontext *tnl = TNL_CONTEXT(ctx);
 108    const struct gl_vertex_program *vp = ctx->VertexProgram._Current;
 109    const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
 110    GLuint i;
 111
 112    if (new_state & (_NEW_HINT | _NEW_PROGRAM)) {
 113       ASSERT(tnl->AllowVertexFog || tnl->AllowPixelFog);
 114       tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 115          || !tnl->AllowPixelFog) && !fp;
 116    }
 117
 118    tnl->pipeline.new_state |= new_state;
 119
 120    /* Calculate tnl->render_inputs.  This bitmask indicates which vertex
 121     * attributes need to be emitted to the rasterizer.
 122     */
 123    RENDERINPUTS_ZERO( tnl->render_inputs_bitset );
 124    RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POS );
 125
 126    if (!fp || (fp->Base.InputsRead & FRAG_BIT_COL0)) {
 127      RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR0 );
 128    }
 129
 130    if (NEED_SECONDARY_COLOR(ctx))
 131      RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR1 );
 132
 133    for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
 134      if (ctx->Texture._EnabledCoordUnits & (1 << i) ||
 135          (fp && fp->Base.InputsRead & FRAG_BIT_TEX(i))) {
 136        RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_TEX(i) );
 137      }
 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 (fp) {
 145       if (fp->FogOption != GL_NONE || (fp->Base.InputsRead & FRAG_BIT_FOGC)) {
 146          /* fragment program needs fog coord */
 147          RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_FOG );
 148       }
 149    }
 150
 151    if (ctx->Polygon.FrontMode != GL_FILL ||
 152        ctx->Polygon.BackMode != GL_FILL)
 153       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_EDGEFLAG );
 154
 155    if (ctx->RenderMode == GL_FEEDBACK)
 156       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_TEX0 );
 157
 158    if (ctx->Point._Attenuated ||
 159        (ctx->VertexProgram._Enabled && ctx->VertexProgram.PointSizeEnabled))
 160       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POINTSIZE );
 161
 162    /* check for varying vars which are written by the vertex program */
 163    if (vp) {
 164       GLuint i;
 165       for (i = 0; i < MAX_VARYING; i++) {
 166          if (vp->Base.OutputsWritten & BITFIELD64_BIT(VERT_RESULT_VAR0 + i)) {
 167             RENDERINPUTS_SET(tnl->render_inputs_bitset,
 168                              _TNL_ATTRIB_GENERIC(i));
 169          }
 170       }
 171    }
 172 }
 173
 174
 175 void
 176 _tnl_wakeup( GLcontext *ctx )
 177 {
 178    /* Assume we haven't been getting state updates either:
 179     */
 180    _tnl_InvalidateState( ctx, ~0 );
 181
 182 #if 0
 183    if (ctx->Light.ColorMaterialEnabled) {
 184       _mesa_update_color_material( ctx,
 185                                    ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 186    }
 187 #endif
 188 }
 189
 190
 191
 192
 193 /**
 194  * Drivers call this function to tell the TCL module whether or not
 195  * it wants Normalized Device Coords (NDC) computed.  I.e. whether
 196  * we should "Divide-by-W".  Software renders will want that.
 197  */
 198 void
 199 _tnl_need_projected_coords( GLcontext *ctx, GLboolean mode )
 200 {
 201    TNLcontext *tnl = TNL_CONTEXT(ctx);
 202    tnl->NeedNdcCoords = mode;
 203 }
 204
 205 void
 206 _tnl_allow_vertex_fog( GLcontext *ctx, GLboolean value )
 207 {
 208    TNLcontext *tnl = TNL_CONTEXT(ctx);
 209    tnl->AllowVertexFog = value;
 210    tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 211       || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
 212
 213 }
 214
 215 void
 216 _tnl_allow_pixel_fog( GLcontext *ctx, GLboolean value )
 217 {
 218    TNLcontext *tnl = TNL_CONTEXT(ctx);
 219    tnl->AllowPixelFog = value;
 220    tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 221       || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
 222 }
 223