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  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  * Authors:
  26  *    Keith Whitwell <keith@tungstengraphics.com>
  27  */
  28
  29
  30 #include "main/glheader.h"
  31 #include "main/imports.h"
  32 #include "main/context.h"
  33 #include "main/macros.h"
  34 #include "main/mtypes.h"
  35 #include "main/light.h"
  36 #include "math/m_translate.h"
  37 #include "math/m_xform.h"
  38 #include "main/state.h"
  39
  40 #include "tnl.h"
  41 #include "t_context.h"
  42 #include "t_pipeline.h"
  43
  44 #include "vbo/vbo.h"
  45
  46 GLboolean
  47 _tnl_CreateContext( struct gl_context *ctx )
  48 {
  49    TNLcontext *tnl;
  50    GLuint i;
  51
  52    /* Create the TNLcontext structure
  53     */
  54    ctx->swtnl_context = tnl = calloc(1, sizeof(TNLcontext));
  55
  56    if (!tnl) {
  57       return GL_FALSE;
  58    }
  59
  60    /* Initialize the VB.
  61     */
  62    tnl->vb.Size = ctx->Const.MaxArrayLockSize + MAX_CLIPPED_VERTICES;
  63
  64
  65    /* Initialize tnl state.
  66     */
  67    if (ctx->VertexProgram._MaintainTnlProgram) {
  68       _tnl_install_pipeline( ctx, _tnl_vp_pipeline );
  69    } else {
  70       _tnl_install_pipeline( ctx, _tnl_default_pipeline );
  71    }
  72
  73    tnl->NeedNdcCoords = GL_TRUE;
  74    tnl->AllowVertexFog = GL_TRUE;
  75    tnl->AllowPixelFog = GL_TRUE;
  76
  77    /* Set a few default values in the driver struct.
  78     */
  79    tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
  80    tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
  81    tnl->Driver.NotifyMaterialChange = _tnl_validate_shine_tables;
  82
  83    tnl->nr_blocks = 0;
  84
  85    /* Lighting miscellaneous */
  86    tnl->_ShineTabList = MALLOC_STRUCT( tnl_shine_tab );
  87    make_empty_list( tnl->_ShineTabList );
  88    /* Allocate 10 (arbitrary) shininess lookup tables */
  89    for (i = 0 ; i < 10 ; i++) {
  90       struct tnl_shine_tab *s = MALLOC_STRUCT( tnl_shine_tab );
  91       s->shininess = -1;
  92       s->refcount = 0;
  93       insert_at_tail( tnl->_ShineTabList, s );
  94    }
  95
  96    /* plug in the VBO drawing function */
  97    vbo_set_draw_func(ctx, _tnl_vbo_draw_prims);
  98
  99    _math_init_transformation();
 100    _math_init_translate();
 101
 102    return GL_TRUE;
 103 }
 104
 105
 106 void
 107 _tnl_DestroyContext( struct gl_context *ctx )
 108 {
 109    struct tnl_shine_tab *s, *tmps;
 110    TNLcontext *tnl = TNL_CONTEXT(ctx);
 111
 112    /* Free lighting shininess exponentiation table */
 113    foreach_s( s, tmps, tnl->_ShineTabList ) {
 114       free( s );
 115    }
 116    free( tnl->_ShineTabList );
 117
 118    _tnl_destroy_pipeline( ctx );
 119
 120    free(tnl);
 121    ctx->swtnl_context = NULL;
 122 }
 123
 124
 125 void
 126 _tnl_InvalidateState( struct gl_context *ctx, GLuint new_state )
 127 {
 128    TNLcontext *tnl = TNL_CONTEXT(ctx);
 129    const struct gl_vertex_program *vp = ctx->VertexProgram._Current;
 130    const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
 131    GLuint i;
 132
 133    if (new_state & (_NEW_HINT | _NEW_PROGRAM)) {
 134       ASSERT(tnl->AllowVertexFog || tnl->AllowPixelFog);
 135       tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 136          || !tnl->AllowPixelFog) && !fp;
 137    }
 138
 139    tnl->pipeline.new_state |= new_state;
 140
 141    /* Calculate tnl->render_inputs.  This bitmask indicates which vertex
 142     * attributes need to be emitted to the rasterizer.
 143     */
 144    tnl->render_inputs_bitset = BITFIELD64_BIT(_TNL_ATTRIB_POS);
 145
 146    if (!fp || (fp->Base.InputsRead & VARYING_BIT_COL0)) {
 147      tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_COLOR0);
 148    }
 149
 150    if (_mesa_need_secondary_color(ctx))
 151      tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_COLOR1);
 152
 153    for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
 154      if (ctx->Texture._EnabledCoordUnits & (1 << i) ||
 155          (fp && fp->Base.InputsRead & VARYING_BIT_TEX(i))) {
 156        tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_TEX(i));
 157      }
 158    }
 159
 160    if (ctx->Fog.Enabled
 161        || (fp != NULL && (fp->Base.InputsRead & VARYING_BIT_FOGC) != 0)) {
 162       /* Either fixed-function fog or a fragment program needs fog coord.
 163        */
 164       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_FOG);
 165    }
 166
 167    if (ctx->Polygon.FrontMode != GL_FILL ||
 168        ctx->Polygon.BackMode != GL_FILL)
 169       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_EDGEFLAG);
 170
 171    if (ctx->RenderMode == GL_FEEDBACK)
 172       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_TEX0);
 173
 174    if (ctx->Point._Attenuated || ctx->VertexProgram.PointSizeEnabled)
 175       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_POINTSIZE);
 176
 177    /* check for varying vars which are written by the vertex program */
 178    if (vp) {
 179       GLuint i;
 180       for (i = 0; i < MAX_VARYING; i++) {
 181          if (vp->Base.OutputsWritten & BITFIELD64_BIT(VARYING_SLOT_VAR0 + i)) {
 182             tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_GENERIC(i));
 183          }
 184       }
 185    }
 186 }
 187
 188
 189 void
 190 _tnl_wakeup( struct gl_context *ctx )
 191 {
 192    /* Assume we haven't been getting state updates either:
 193     */
 194    _tnl_InvalidateState( ctx, ~0 );
 195
 196 #if 0
 197    if (ctx->Light.ColorMaterialEnabled) {
 198       _mesa_update_color_material( ctx,
 199                                    ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 200    }
 201 #endif
 202 }
 203
 204
 205
 206
 207 /**
 208  * Drivers call this function to tell the TCL module whether or not
 209  * it wants Normalized Device Coords (NDC) computed.  I.e. whether
 210  * we should "Divide-by-W".  Software renders will want that.
 211  */
 212 void
 213 _tnl_need_projected_coords( struct gl_context *ctx, GLboolean mode )
 214 {
 215    TNLcontext *tnl = TNL_CONTEXT(ctx);
 216    tnl->NeedNdcCoords = mode;
 217 }
 218
 219 void
 220 _tnl_allow_vertex_fog( struct gl_context *ctx, GLboolean value )
 221 {
 222    TNLcontext *tnl = TNL_CONTEXT(ctx);
 223    tnl->AllowVertexFog = value;
 224    tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 225       || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
 226
 227 }
 228
 229 void
 230 _tnl_allow_pixel_fog( struct gl_context *ctx, GLboolean value )
 231 {
 232    TNLcontext *tnl = TNL_CONTEXT(ctx);
 233    tnl->AllowPixelFog = value;
 234    tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 235       || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
 236 }
 237