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