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    /* plug in the VBO drawing function */
  82    vbo_set_draw_func(ctx, _tnl_draw_prims);
  83
  84    return GL_TRUE;
  85 }
  86
  87
  88 void
  89 _tnl_DestroyContext( GLcontext *ctx )
  90 {
  91    TNLcontext *tnl = TNL_CONTEXT(ctx);
  92
  93    _tnl_destroy_pipeline( ctx );
  94
  95    FREE(tnl);
  96    ctx->swtnl_context = NULL;
  97 }
  98
  99
 100 void
 101 _tnl_InvalidateState( GLcontext *ctx, GLuint new_state )
 102 {
 103    TNLcontext *tnl = TNL_CONTEXT(ctx);
 104    const struct gl_vertex_program *vp = ctx->VertexProgram._Current;
 105    const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
 106
 107    if (new_state & (_NEW_HINT | _NEW_PROGRAM)) {
 108       ASSERT(tnl->AllowVertexFog || tnl->AllowPixelFog);
 109       tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 110          || !tnl->AllowPixelFog) && !fp;
 111    }
 112
 113    tnl->pipeline.new_state |= new_state;
 114
 115    /* Calculate tnl->render_inputs:
 116     */
 117    if (ctx->Visual.rgbMode) {
 118       GLuint i;
 119
 120       RENDERINPUTS_ZERO( tnl->render_inputs_bitset );
 121       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POS );
 122       if (!fp || (fp->Base.InputsRead & FRAG_BIT_COL0)) {
 123          RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR0 );
 124       }
 125       for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
 126          if (ctx->Texture._EnabledCoordUnits & (1 << i)) {
 127             RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_TEX(i) );
 128          }
 129       }
 130
 131       if (NEED_SECONDARY_COLOR(ctx))
 132          RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR1 );
 133    }
 134    else {
 135       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POS );
 136       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR_INDEX );
 137    }
 138
 139    if (ctx->Fog.Enabled) {
 140       /* fixed-function fog */
 141       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_FOG );
 142    }
 143    else if (ctx->FragmentProgram._Current) {
 144       struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
 145       if (fp) {
 146          if (fp->FogOption != GL_NONE || (fp->Base.InputsRead & FRAG_BIT_FOGC)) {
 147             /* fragment program needs fog coord */
 148             RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_FOG );
 149          }
 150       }
 151    }
 152
 153    if (ctx->Polygon.FrontMode != GL_FILL ||
 154        ctx->Polygon.BackMode != GL_FILL)
 155       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_EDGEFLAG );
 156
 157    if (ctx->RenderMode == GL_FEEDBACK)
 158       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_TEX0 );
 159
 160    if (ctx->Point._Attenuated ||
 161        (ctx->VertexProgram._Enabled && ctx->VertexProgram.PointSizeEnabled))
 162       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POINTSIZE );
 163
 164    /* check for varying vars which are written by the vertex program */
 165    if (vp) {
 166       GLuint i;
 167       for (i = 0; i < MAX_VARYING; i++) {
 168          if (vp->Base.OutputsWritten & (1 << (VERT_RESULT_VAR0 + i))) {
 169             RENDERINPUTS_SET(tnl->render_inputs_bitset,
 170                              _TNL_ATTRIB_GENERIC(i));
 171          }
 172       }
 173    }
 174 }
 175
 176
 177 void
 178 _tnl_wakeup( GLcontext *ctx )
 179 {
 180    /* Assume we haven't been getting state updates either:
 181     */
 182    _tnl_InvalidateState( ctx, ~0 );
 183
 184 #if 0
 185    if (ctx->Light.ColorMaterialEnabled) {
 186       _mesa_update_color_material( ctx,
 187                                    ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 188    }
 189 #endif
 190 }
 191
 192
 193
 194
 195 /**
 196  * Drivers call this function to tell the TCL module whether or not
 197  * it wants Normalized Device Coords (NDC) computed.  I.e. whether
 198  * we should "Divide-by-W".  Software renders will want that.
 199  */
 200 void
 201 _tnl_need_projected_coords( GLcontext *ctx, GLboolean mode )
 202 {
 203    TNLcontext *tnl = TNL_CONTEXT(ctx);
 204    tnl->NeedNdcCoords = mode;
 205 }
 206
 207 void
 208 _tnl_allow_vertex_fog( GLcontext *ctx, GLboolean value )
 209 {
 210    TNLcontext *tnl = TNL_CONTEXT(ctx);
 211    tnl->AllowVertexFog = value;
 212    tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 213       || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
 214
 215 }
 216
 217 void
 218 _tnl_allow_pixel_fog( GLcontext *ctx, GLboolean value )
 219 {
 220    TNLcontext *tnl = TNL_CONTEXT(ctx);
 221    tnl->AllowPixelFog = value;
 222    tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 223       || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
 224 }
 225