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 #include "main/viewport.h"
  39 #include "util/simple_list.h"
  40
  41 #include "tnl.h"
  42 #include "t_context.h"
  43 #include "t_pipeline.h"
  44
  45 #include "vbo/vbo.h"
  46
  47 GLboolean
  48 _tnl_CreateContext( struct gl_context *ctx )
  49 {
  50    TNLcontext *tnl;
  51    GLuint i;
  52
  53    /* Create the TNLcontext structure
  54     */
  55    ctx->swtnl_context = tnl = calloc(1, sizeof(TNLcontext));
  56
  57    if (!tnl) {
  58       return GL_FALSE;
  59    }
  60
  61    /* Initialize the VB.
  62     */
  63    tnl->vb.Size = ctx->Const.MaxArrayLockSize + MAX_CLIPPED_VERTICES;
  64
  65
  66    /* Initialize tnl state.
  67     */
  68    if (ctx->VertexProgram._MaintainTnlProgram) {
  69       _tnl_install_pipeline( ctx, _tnl_vp_pipeline );
  70    } else {
  71       _tnl_install_pipeline( ctx, _tnl_default_pipeline );
  72    }
  73
  74    _math_matrix_ctr(&tnl->_WindowMap);
  75
  76    tnl->NeedNdcCoords = GL_TRUE;
  77    tnl->AllowVertexFog = GL_TRUE;
  78    tnl->AllowPixelFog = GL_TRUE;
  79
  80    /* Set a few default values in the driver struct.
  81     */
  82    tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
  83    tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
  84    tnl->Driver.NotifyMaterialChange = _tnl_validate_shine_tables;
  85
  86    tnl->nr_blocks = 0;
  87
  88    /* Lighting miscellaneous */
  89    tnl->_ShineTabList = MALLOC_STRUCT( tnl_shine_tab );
  90    make_empty_list( tnl->_ShineTabList );
  91    /* Allocate 10 (arbitrary) shininess lookup tables */
  92    for (i = 0 ; i < 10 ; i++) {
  93       struct tnl_shine_tab *s = MALLOC_STRUCT( tnl_shine_tab );
  94       s->shininess = -1;
  95       s->refcount = 0;
  96       insert_at_tail( tnl->_ShineTabList, s );
  97    }
  98
  99    /* plug in the VBO drawing function */
 100    vbo_set_draw_func(ctx, _tnl_draw_prims);
 101
 102    _math_init_transformation();
 103    _math_init_translate();
 104
 105    return GL_TRUE;
 106 }
 107
 108
 109 void
 110 _tnl_DestroyContext( struct gl_context *ctx )
 111 {
 112    struct tnl_shine_tab *s, *tmps;
 113    TNLcontext *tnl = TNL_CONTEXT(ctx);
 114
 115    _math_matrix_dtr(&tnl->_WindowMap);
 116
 117    /* Free lighting shininess exponentiation table */
 118    foreach_s( s, tmps, tnl->_ShineTabList ) {
 119       free( s );
 120    }
 121    free( tnl->_ShineTabList );
 122
 123    _tnl_destroy_pipeline( ctx );
 124
 125    free(tnl);
 126    ctx->swtnl_context = NULL;
 127 }
 128
 129
 130 void
 131 _tnl_InvalidateState( struct gl_context *ctx, GLuint new_state )
 132 {
 133    TNLcontext *tnl = TNL_CONTEXT(ctx);
 134    const struct gl_program *vp = ctx->VertexProgram._Current;
 135    const struct gl_program *fp = ctx->FragmentProgram._Current;
 136    GLuint i;
 137
 138    if (new_state & (_NEW_HINT | _NEW_PROGRAM)) {
 139       assert(tnl->AllowVertexFog || tnl->AllowPixelFog);
 140       tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 141          || !tnl->AllowPixelFog) && !fp;
 142    }
 143
 144    tnl->pipeline.new_state |= new_state;
 145
 146    /* Calculate tnl->render_inputs.  This bitmask indicates which vertex
 147     * attributes need to be emitted to the rasterizer.
 148     */
 149    tnl->render_inputs_bitset = BITFIELD64_BIT(_TNL_ATTRIB_POS);
 150
 151    if (!fp || (fp->info.inputs_read & VARYING_BIT_COL0)) {
 152      tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_COLOR0);
 153    }
 154
 155    if (_mesa_need_secondary_color(ctx))
 156      tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_COLOR1);
 157
 158    for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
 159      if (ctx->Texture._EnabledCoordUnits & (1 << i) ||
 160          (fp && fp->info.inputs_read & VARYING_BIT_TEX(i))) {
 161        tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_TEX(i));
 162      }
 163    }
 164
 165    if (ctx->Fog.Enabled
 166        || (fp != NULL && (fp->info.inputs_read & VARYING_BIT_FOGC) != 0)) {
 167       /* Either fixed-function fog or a fragment program needs fog coord.
 168        */
 169       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_FOG);
 170    }
 171
 172    if (ctx->Polygon.FrontMode != GL_FILL ||
 173        ctx->Polygon.BackMode != GL_FILL)
 174       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_EDGEFLAG);
 175
 176    if (ctx->RenderMode == GL_FEEDBACK)
 177       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_TEX0);
 178
 179    if (ctx->Point._Attenuated || ctx->VertexProgram.PointSizeEnabled)
 180       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_POINTSIZE);
 181
 182    /* check for varying vars which are written by the vertex program */
 183    if (vp) {
 184       GLuint i;
 185       for (i = 0; i < MAX_VARYING; i++) {
 186          if (vp->info.outputs_written &
 187              BITFIELD64_BIT(VARYING_SLOT_VAR0 + i)) {
 188             tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_GENERIC(i));
 189          }
 190       }
 191    }
 192
 193    if (new_state & (_NEW_VIEWPORT | _NEW_BUFFERS)) {
 194       float scale[3], translate[3];
 195       _mesa_get_viewport_xform(ctx, 0, scale, translate);
 196       _math_matrix_viewport(&tnl->_WindowMap, scale, translate,
 197                             ctx->DrawBuffer->_DepthMaxF);
 198    }
 199 }
 200
 201
 202 void
 203 _tnl_wakeup( struct gl_context *ctx )
 204 {
 205    /* Assume we haven't been getting state updates either:
 206     */
 207    _tnl_InvalidateState( ctx, ~0 );
 208
 209 #if 0
 210    if (ctx->Light.ColorMaterialEnabled) {
 211       _mesa_update_color_material( ctx,
 212                                    ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 213    }
 214 #endif
 215 }
 216
 217
 218
 219
 220 /**
 221  * Drivers call this function to tell the TCL module whether or not
 222  * it wants Normalized Device Coords (NDC) computed.  I.e. whether
 223  * we should "Divide-by-W".  Software renders will want that.
 224  */
 225 void
 226 _tnl_need_projected_coords( struct gl_context *ctx, GLboolean mode )
 227 {
 228    TNLcontext *tnl = TNL_CONTEXT(ctx);
 229    tnl->NeedNdcCoords = mode;
 230 }
 231
 232 void
 233 _tnl_allow_vertex_fog( struct gl_context *ctx, GLboolean value )
 234 {
 235    TNLcontext *tnl = TNL_CONTEXT(ctx);
 236    tnl->AllowVertexFog = value;
 237    tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 238       || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
 239
 240 }
 241
 242 void
 243 _tnl_allow_pixel_fog( struct gl_context *ctx, GLboolean value )
 244 {
 245    TNLcontext *tnl = TNL_CONTEXT(ctx);
 246    tnl->AllowPixelFog = value;
 247    tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 248       || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
 249 }
 250