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 #include "t_vp_build.h"
  42
  43 #include "vbo/vbo.h"
  44
  45 GLboolean
  46 _tnl_CreateContext( GLcontext *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( GLcontext *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( GLcontext *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
 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    if (ctx->Visual.rgbMode) {
 124       GLuint i;
 125
 126       RENDERINPUTS_ZERO( tnl->render_inputs_bitset );
 127       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POS );
 128
 129       if (!fp || (fp->Base.InputsRead & FRAG_BIT_COL0)) {
 130          RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR0 );
 131       }
 132
 133       if (NEED_SECONDARY_COLOR(ctx))
 134          RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR1 );
 135
 136       for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
 137          if (ctx->Texture._EnabledCoordUnits & (1 << i) ||
 138              (fp && fp->Base.InputsRead & FRAG_BIT_TEX(i))) {
 139             RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_TEX(i) );
 140          }
 141       }
 142    }
 143    else {
 144       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POS );
 145       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR_INDEX );
 146    }
 147
 148    if (ctx->Fog.Enabled) {
 149       /* fixed-function fog */
 150       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_FOG );
 151    }
 152    else if (fp) {
 153       if (fp->FogOption != GL_NONE || (fp->Base.InputsRead & FRAG_BIT_FOGC)) {
 154          /* fragment program needs fog coord */
 155          RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_FOG );
 156       }
 157    }
 158
 159    if (ctx->Polygon.FrontMode != GL_FILL ||
 160        ctx->Polygon.BackMode != GL_FILL)
 161       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_EDGEFLAG );
 162
 163    if (ctx->RenderMode == GL_FEEDBACK)
 164       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_TEX0 );
 165
 166    if (ctx->Point._Attenuated ||
 167        (ctx->VertexProgram._Enabled && ctx->VertexProgram.PointSizeEnabled))
 168       RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POINTSIZE );
 169
 170    /* check for varying vars which are written by the vertex program */
 171    if (vp) {
 172       GLuint i;
 173       for (i = 0; i < MAX_VARYING; i++) {
 174          if (vp->Base.OutputsWritten & BITFIELD64_BIT(VERT_RESULT_VAR0 + i)) {
 175             RENDERINPUTS_SET(tnl->render_inputs_bitset,
 176                              _TNL_ATTRIB_GENERIC(i));
 177          }
 178       }
 179    }
 180 }
 181
 182
 183 void
 184 _tnl_wakeup( GLcontext *ctx )
 185 {
 186    /* Assume we haven't been getting state updates either:
 187     */
 188    _tnl_InvalidateState( ctx, ~0 );
 189
 190 #if 0
 191    if (ctx->Light.ColorMaterialEnabled) {
 192       _mesa_update_color_material( ctx,
 193                                    ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 194    }
 195 #endif
 196 }
 197
 198
 199
 200
 201 /**
 202  * Drivers call this function to tell the TCL module whether or not
 203  * it wants Normalized Device Coords (NDC) computed.  I.e. whether
 204  * we should "Divide-by-W".  Software renders will want that.
 205  */
 206 void
 207 _tnl_need_projected_coords( GLcontext *ctx, GLboolean mode )
 208 {
 209    TNLcontext *tnl = TNL_CONTEXT(ctx);
 210    tnl->NeedNdcCoords = mode;
 211 }
 212
 213 void
 214 _tnl_allow_vertex_fog( GLcontext *ctx, GLboolean value )
 215 {
 216    TNLcontext *tnl = TNL_CONTEXT(ctx);
 217    tnl->AllowVertexFog = value;
 218    tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 219       || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
 220
 221 }
 222
 223 void
 224 _tnl_allow_pixel_fog( GLcontext *ctx, GLboolean value )
 225 {
 226    TNLcontext *tnl = TNL_CONTEXT(ctx);
 227    tnl->AllowPixelFog = value;
 228    tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 229       || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
 230 }
 231