dll/opengl/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  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Keith Whitwell <keith@tungstengraphics.com>
  26  */
  27
  28 #include <precomp.h>
  29
  30 GLboolean
  31 _tnl_CreateContext( struct gl_context *ctx )
  32 {
  33    TNLcontext *tnl;
  34
  35    /* Create the TNLcontext structure
  36     */
  37    ctx->swtnl_context = tnl = (TNLcontext *) CALLOC( sizeof(TNLcontext) );
  38
  39    if (!tnl) {
  40       return GL_FALSE;
  41    }
  42
  43    /* Initialize the VB.
  44     */
  45    tnl->vb.Size = ctx->Const.MaxArrayLockSize + MAX_CLIPPED_VERTICES;
  46
  47
  48    /* Initialize tnl state.
  49     */
  50    _tnl_install_pipeline( ctx, _tnl_default_pipeline );
  51
  52    tnl->NeedNdcCoords = GL_TRUE;
  53    tnl->AllowVertexFog = GL_TRUE;
  54    tnl->AllowPixelFog = GL_TRUE;
  55
  56    /* Set a few default values in the driver struct.
  57     */
  58    tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
  59    tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
  60    tnl->Driver.NotifyMaterialChange = _mesa_validate_all_lighting_tables;
  61
  62    tnl->nr_blocks = 0;
  63
  64    /* plug in the VBO drawing function */
  65    vbo_set_draw_func(ctx, _tnl_vbo_draw_prims);
  66
  67    _math_init_transformation();
  68    _math_init_translate();
  69
  70    return GL_TRUE;
  71 }
  72
  73
  74 void
  75 _tnl_DestroyContext( struct gl_context *ctx )
  76 {
  77    TNLcontext *tnl = TNL_CONTEXT(ctx);
  78
  79    _tnl_destroy_pipeline( ctx );
  80
  81    FREE(tnl);
  82    ctx->swtnl_context = NULL;
  83 }
  84
  85
  86 void
  87 _tnl_InvalidateState( struct gl_context *ctx, GLuint new_state )
  88 {
  89    TNLcontext *tnl = TNL_CONTEXT(ctx);
  90
  91    if (new_state & _NEW_HINT) {
  92       ASSERT(tnl->AllowVertexFog || tnl->AllowPixelFog);
  93       tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
  94          || !tnl->AllowPixelFog);
  95    }
  96
  97    tnl->pipeline.new_state |= new_state;
  98
  99    /* Calculate tnl->render_inputs.  This bitmask indicates which vertex
 100     * attributes need to be emitted to the rasterizer.
 101     */
 102    tnl->render_inputs_bitset = BITFIELD64_BIT(_TNL_ATTRIB_POS);
 103
 104    tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_COLOR);
 105
 106    if (ctx->Texture._EnabledCoord) {
 107       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_TEX);
 108    }
 109
 110    if (ctx->Fog.Enabled) {
 111       /* Either fixed-function fog or a fragment program needs fog coord.
 112        */
 113       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_FOG);
 114    }
 115
 116    if (ctx->Polygon.FrontMode != GL_FILL ||
 117        ctx->Polygon.BackMode != GL_FILL)
 118       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_EDGEFLAG);
 119
 120    if (ctx->RenderMode == GL_FEEDBACK)
 121       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_TEX);
 122
 123    if (ctx->Point._Attenuated)
 124       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_POINTSIZE);
 125 }
 126
 127
 128 void
 129 _tnl_wakeup( struct gl_context *ctx )
 130 {
 131    /* Assume we haven't been getting state updates either:
 132     */
 133    _tnl_InvalidateState( ctx, ~0 );
 134
 135 #if 0
 136    if (ctx->Light.ColorMaterialEnabled) {
 137       _mesa_update_color_material( ctx,
 138                                    ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 139    }
 140 #endif
 141 }
 142
 143
 144
 145
 146 /**
 147  * Drivers call this function to tell the TCL module whether or not
 148  * it wants Normalized Device Coords (NDC) computed.  I.e. whether
 149  * we should "Divide-by-W".  Software renders will want that.
 150  */
 151 void
 152 _tnl_need_projected_coords( struct gl_context *ctx, GLboolean mode )
 153 {
 154    TNLcontext *tnl = TNL_CONTEXT(ctx);
 155    tnl->NeedNdcCoords = mode;
 156 }
 157
 158 void
 159 _tnl_allow_vertex_fog( struct gl_context *ctx, GLboolean value )
 160 {
 161    TNLcontext *tnl = TNL_CONTEXT(ctx);
 162    tnl->AllowVertexFog = value;
 163    tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 164       || !tnl->AllowPixelFog);
 165
 166 }
 167
 168 void
 169 _tnl_allow_pixel_fog( struct gl_context *ctx, GLboolean value )
 170 {
 171    TNLcontext *tnl = TNL_CONTEXT(ctx);
 172    tnl->AllowPixelFog = value;
 173    tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 174       || !tnl->AllowPixelFog);
 175 }
 176