src/mesa/tnl/t_context.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Keith Whitwell <keithw@vmware.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    GLuint i;
  50
  51    /* Create the TNLcontext structure
  52     */
  53    ctx->swtnl_context = tnl = calloc(1, sizeof(TNLcontext));
  54
  55    if (!tnl) {
  56       return GL_FALSE;
  57    }
  58
  59    /* Initialize the VB.
  60     */
  61    tnl->vb.Size = ctx->Const.MaxArrayLockSize + MAX_CLIPPED_VERTICES;
  62
  63
  64    /* Initialize tnl state.
  65     */
  66    if (ctx->VertexProgram._MaintainTnlProgram) {
  67       _tnl_install_pipeline( ctx, _tnl_vp_pipeline );
  68    } else {
  69       _tnl_install_pipeline( ctx, _tnl_default_pipeline );
  70    }
  71
  72    tnl->NeedNdcCoords = GL_TRUE;
  73    tnl->AllowVertexFog = GL_TRUE;
  74    tnl->AllowPixelFog = GL_TRUE;
  75
  76    /* Set a few default values in the driver struct.
  77     */
  78    tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
  79    tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
  80    tnl->Driver.NotifyMaterialChange = _tnl_validate_shine_tables;
  81
  82    tnl->nr_blocks = 0;
  83
  84    /* Lighting miscellaneous */
  85    tnl->_ShineTabList = MALLOC_STRUCT( tnl_shine_tab );
  86    make_empty_list( tnl->_ShineTabList );
  87    /* Allocate 10 (arbitrary) shininess lookup tables */
  88    for (i = 0 ; i < 10 ; i++) {
  89       struct tnl_shine_tab *s = MALLOC_STRUCT( tnl_shine_tab );
  90       s->shininess = -1;
  91       s->refcount = 0;
  92       insert_at_tail( tnl->_ShineTabList, s );
  93    }
  94
  95    /* plug in the VBO drawing function */
  96    vbo_set_draw_func(ctx, _tnl_vbo_draw_prims);
  97
  98    _math_init_transformation();
  99    _math_init_translate();
 100
 101    return GL_TRUE;
 102 }
 103
 104
 105 void
 106 _tnl_DestroyContext( struct gl_context *ctx )
 107 {
 108    struct tnl_shine_tab *s, *tmps;
 109    TNLcontext *tnl = TNL_CONTEXT(ctx);
 110
 111    /* Free lighting shininess exponentiation table */
 112    foreach_s( s, tmps, tnl->_ShineTabList ) {
 113       free( s );
 114    }
 115    free( tnl->_ShineTabList );
 116
 117    _tnl_destroy_pipeline( ctx );
 118
 119    free(tnl);
 120    ctx->swtnl_context = NULL;
 121 }
 122
 123
 124 void
 125 _tnl_InvalidateState( struct gl_context *ctx, GLuint new_state )
 126 {
 127    TNLcontext *tnl = TNL_CONTEXT(ctx);
 128    const struct gl_vertex_program *vp = ctx->VertexProgram._Current;
 129    const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
 130    GLuint i;
 131
 132    if (new_state & (_NEW_HINT | _NEW_PROGRAM)) {
 133       ASSERT(tnl->AllowVertexFog || tnl->AllowPixelFog);
 134       tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 135          || !tnl->AllowPixelFog) && !fp;
 136    }
 137
 138    tnl->pipeline.new_state |= new_state;
 139
 140    /* Calculate tnl->render_inputs.  This bitmask indicates which vertex
 141     * attributes need to be emitted to the rasterizer.
 142     */
 143    tnl->render_inputs_bitset = BITFIELD64_BIT(_TNL_ATTRIB_POS);
 144
 145    if (!fp || (fp->Base.InputsRead & VARYING_BIT_COL0)) {
 146      tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_COLOR0);
 147    }
 148
 149    if (_mesa_need_secondary_color(ctx))
 150      tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_COLOR1);
 151
 152    for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
 153      if (ctx->Texture._EnabledCoordUnits & (1 << i) ||
 154          (fp && fp->Base.InputsRead & VARYING_BIT_TEX(i))) {
 155        tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_TEX(i));
 156      }
 157    }
 158
 159    if (ctx->Fog.Enabled
 160        || (fp != NULL && (fp->Base.InputsRead & VARYING_BIT_FOGC) != 0)) {
 161       /* Either fixed-function fog or a fragment program needs fog coord.
 162        */
 163       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_FOG);
 164    }
 165
 166    if (ctx->Polygon.FrontMode != GL_FILL ||
 167        ctx->Polygon.BackMode != GL_FILL)
 168       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_EDGEFLAG);
 169
 170    if (ctx->RenderMode == GL_FEEDBACK)
 171       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_TEX0);
 172
 173    if (ctx->Point._Attenuated || ctx->VertexProgram.PointSizeEnabled)
 174       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_POINTSIZE);
 175
 176    /* check for varying vars which are written by the vertex program */
 177    if (vp) {
 178       GLuint i;
 179       for (i = 0; i < MAX_VARYING; i++) {
 180          if (vp->Base.OutputsWritten & BITFIELD64_BIT(VARYING_SLOT_VAR0 + i)) {
 181             tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_GENERIC(i));
 182          }
 183       }
 184    }
 185 }
 186
 187
 188 void
 189 _tnl_wakeup( struct gl_context *ctx )
 190 {
 191    /* Assume we haven't been getting state updates either:
 192     */
 193    _tnl_InvalidateState( ctx, ~0 );
 194
 195 #if 0
 196    if (ctx->Light.ColorMaterialEnabled) {
 197       _mesa_update_color_material( ctx,
 198                                    ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 199    }
 200 #endif
 201 }
 202
 203
 204
 205
 206 /**
 207  * Drivers call this function to tell the TCL module whether or not
 208  * it wants Normalized Device Coords (NDC) computed.  I.e. whether
 209  * we should "Divide-by-W".  Software renders will want that.
 210  */
 211 void
 212 _tnl_need_projected_coords( struct gl_context *ctx, GLboolean mode )
 213 {
 214    TNLcontext *tnl = TNL_CONTEXT(ctx);
 215    tnl->NeedNdcCoords = mode;
 216 }
 217
 218 void
 219 _tnl_allow_vertex_fog( struct gl_context *ctx, GLboolean value )
 220 {
 221    TNLcontext *tnl = TNL_CONTEXT(ctx);
 222    tnl->AllowVertexFog = value;
 223    tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 224       || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
 225
 226 }
 227
 228 void
 229 _tnl_allow_pixel_fog( struct gl_context *ctx, GLboolean value )
 230 {
 231    TNLcontext *tnl = TNL_CONTEXT(ctx);
 232    tnl->AllowPixelFog = value;
 233    tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 234       || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
 235 }
 236