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
  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 #include "util/u_memory.h"
  41
  42 #include "tnl.h"
  43 #include "t_context.h"
  44 #include "t_pipeline.h"
  45
  46 #include "vbo/vbo.h"
  47
  48 GLboolean
  49 _tnl_CreateContext( struct gl_context *ctx )
  50 {
  51    TNLcontext *tnl;
  52    GLuint i;
  53
  54    /* Create the TNLcontext structure
  55     */
  56    ctx->swtnl_context = tnl = calloc(1, sizeof(TNLcontext));
  57
  58    if (!tnl) {
  59       return GL_FALSE;
  60    }
  61
  62    /* Initialize the VB.
  63     */
  64    tnl->vb.Size = ctx->Const.MaxArrayLockSize + MAX_CLIPPED_VERTICES;
  65
  66
  67    /* Initialize tnl state.
  68     */
  69    if (ctx->VertexProgram._MaintainTnlProgram) {
  70       _tnl_install_pipeline( ctx, _tnl_vp_pipeline );
  71    } else {
  72       _tnl_install_pipeline( ctx, _tnl_default_pipeline );
  73    }
  74
  75    _math_matrix_ctr(&tnl->_WindowMap);
  76
  77    tnl->NeedNdcCoords = GL_TRUE;
  78    tnl->AllowVertexFog = GL_TRUE;
  79    tnl->AllowPixelFog = GL_TRUE;
  80
  81    /* Set a few default values in the driver struct.
  82     */
  83    tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
  84    tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
  85    tnl->Driver.NotifyMaterialChange = _tnl_validate_shine_tables;
  86
  87    tnl->nr_blocks = 0;
  88
  89    /* Lighting miscellaneous */
  90    tnl->_ShineTabList = MALLOC_STRUCT( tnl_shine_tab );
  91    make_empty_list( tnl->_ShineTabList );
  92    /* Allocate 10 (arbitrary) shininess lookup tables */
  93    for (i = 0 ; i < 10 ; i++) {
  94       struct tnl_shine_tab *s = MALLOC_STRUCT( tnl_shine_tab );
  95       s->shininess = -1;
  96       s->refcount = 0;
  97       insert_at_tail( tnl->_ShineTabList, s );
  98    }
  99
 100    _math_init_transformation();
 101    _math_init_translate();
 102
 103    /* Keep our list of tnl_vertex_array inputs */
 104    _tnl_init_inputs(&tnl->draw_arrays);
 105
 106    return GL_TRUE;
 107 }
 108
 109
 110 void
 111 _tnl_DestroyContext( struct gl_context *ctx )
 112 {
 113    struct tnl_shine_tab *s, *tmps;
 114    TNLcontext *tnl = TNL_CONTEXT(ctx);
 115
 116    _math_matrix_dtr(&tnl->_WindowMap);
 117
 118    /* Free lighting shininess exponentiation table */
 119    foreach_s( s, tmps, tnl->_ShineTabList ) {
 120       free( s );
 121    }
 122    free( tnl->_ShineTabList );
 123
 124    _tnl_destroy_pipeline( ctx );
 125
 126    free(tnl);
 127    ctx->swtnl_context = NULL;
 128 }
 129
 130
 131 void
 132 _tnl_InvalidateState( struct gl_context *ctx, GLuint new_state )
 133 {
 134    TNLcontext *tnl = TNL_CONTEXT(ctx);
 135    const struct gl_program *vp = ctx->VertexProgram._Current;
 136    const struct gl_program *fp = ctx->FragmentProgram._Current;
 137    GLuint i;
 138
 139    if (new_state & (_NEW_HINT | _NEW_PROGRAM)) {
 140       assert(tnl->AllowVertexFog || tnl->AllowPixelFog);
 141       tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 142          || !tnl->AllowPixelFog) && !fp;
 143    }
 144
 145    tnl->pipeline.new_state |= new_state;
 146
 147    /* Calculate tnl->render_inputs.  This bitmask indicates which vertex
 148     * attributes need to be emitted to the rasterizer.
 149     */
 150    tnl->render_inputs_bitset = BITFIELD64_BIT(_TNL_ATTRIB_POS);
 151
 152    if (!fp || (fp->info.inputs_read & VARYING_BIT_COL0)) {
 153      tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_COLOR0);
 154    }
 155
 156    if (_mesa_need_secondary_color(ctx))
 157      tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_COLOR1);
 158
 159    for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
 160      if (ctx->Texture._EnabledCoordUnits & (1 << i) ||
 161          (fp && fp->info.inputs_read & VARYING_BIT_TEX(i)) ||
 162          _mesa_ati_fragment_shader_enabled(ctx)) {
 163        tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_TEX(i));
 164      }
 165    }
 166
 167    if (ctx->Fog.Enabled
 168        || (fp != NULL && (fp->info.inputs_read & VARYING_BIT_FOGC) != 0)) {
 169       /* Either fixed-function fog or a fragment program needs fog coord.
 170        */
 171       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_FOG);
 172    }
 173
 174    if (ctx->Polygon.FrontMode != GL_FILL ||
 175        ctx->Polygon.BackMode != GL_FILL)
 176       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_EDGEFLAG);
 177
 178    if (ctx->RenderMode == GL_FEEDBACK)
 179       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_TEX0);
 180
 181    if (ctx->Point._Attenuated || ctx->VertexProgram.PointSizeEnabled)
 182       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_POINTSIZE);
 183
 184    /* check for varying vars which are written by the vertex program */
 185    if (vp) {
 186       GLuint i;
 187       for (i = 0; i < MAX_VARYING; i++) {
 188          if (vp->info.outputs_written &
 189              BITFIELD64_BIT(VARYING_SLOT_VAR0 + i)) {
 190             tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_GENERIC(i));
 191          }
 192       }
 193    }
 194
 195    if (new_state & (_NEW_VIEWPORT | _NEW_BUFFERS)) {
 196       float scale[3], translate[3];
 197       _mesa_get_viewport_xform(ctx, 0, scale, translate);
 198       _math_matrix_viewport(&tnl->_WindowMap, scale, translate,
 199                             ctx->DrawBuffer->_DepthMaxF);
 200    }
 201 }
 202
 203
 204 void
 205 _tnl_wakeup( struct gl_context *ctx )
 206 {
 207    /* Assume we haven't been getting state updates either:
 208     */
 209    _tnl_InvalidateState( ctx, ~0 );
 210
 211 #if 0
 212    if (ctx->Light.ColorMaterialEnabled) {
 213       _mesa_update_color_material( ctx,
 214                                    ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 215    }
 216 #endif
 217 }
 218
 219
 220
 221
 222 /**
 223  * Drivers call this function to tell the TCL module whether or not
 224  * it wants Normalized Device Coords (NDC) computed.  I.e. whether
 225  * we should "Divide-by-W".  Software renders will want that.
 226  */
 227 void
 228 _tnl_need_projected_coords( struct gl_context *ctx, GLboolean mode )
 229 {
 230    TNLcontext *tnl = TNL_CONTEXT(ctx);
 231    tnl->NeedNdcCoords = mode;
 232 }
 233
 234 void
 235 _tnl_allow_vertex_fog( struct gl_context *ctx, GLboolean value )
 236 {
 237    TNLcontext *tnl = TNL_CONTEXT(ctx);
 238    tnl->AllowVertexFog = value;
 239    tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 240       || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
 241
 242 }
 243
 244 void
 245 _tnl_allow_pixel_fog( struct gl_context *ctx, GLboolean value )
 246 {
 247    TNLcontext *tnl = TNL_CONTEXT(ctx);
 248    tnl->AllowPixelFog = value;
 249    tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 250       || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
 251 }
 252