reactos/dll/opengl/mesa/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  * 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
  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
  39 #include "tnl.h"
  40 #include "t_context.h"
  41 #include "t_pipeline.h"
  42
  43 #include "vbo/vbo.h"
  44
  45 GLboolean
  46 _tnl_CreateContext( struct gl_context *ctx )
  47 {
  48    TNLcontext *tnl;
  49
  50    /* Create the TNLcontext structure
  51     */
  52    ctx->swtnl_context = tnl = (TNLcontext *) CALLOC( sizeof(TNLcontext) );
  53
  54    if (!tnl) {
  55       return GL_FALSE;
  56    }
  57
  58    /* Initialize the VB.
  59     */
  60    tnl->vb.Size = ctx->Const.MaxArrayLockSize + MAX_CLIPPED_VERTICES;
  61
  62
  63    /* Initialize tnl state.
  64     */
  65    if (ctx->VertexProgram._MaintainTnlProgram) {
  66       _tnl_install_pipeline( ctx, _tnl_vp_pipeline );
  67    } else {
  68       _tnl_install_pipeline( ctx, _tnl_default_pipeline );
  69    }
  70
  71    tnl->NeedNdcCoords = GL_TRUE;
  72    tnl->AllowVertexFog = GL_TRUE;
  73    tnl->AllowPixelFog = GL_TRUE;
  74
  75    /* Set a few default values in the driver struct.
  76     */
  77    tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
  78    tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
  79    tnl->Driver.NotifyMaterialChange = _mesa_validate_all_lighting_tables;
  80
  81    tnl->nr_blocks = 0;
  82
  83    /* plug in the VBO drawing function */
  84    vbo_set_draw_func(ctx, _tnl_vbo_draw_prims);
  85
  86    _math_init_transformation();
  87    _math_init_translate();
  88
  89    return GL_TRUE;
  90 }
  91
  92
  93 void
  94 _tnl_DestroyContext( struct gl_context *ctx )
  95 {
  96    TNLcontext *tnl = TNL_CONTEXT(ctx);
  97
  98    _tnl_destroy_pipeline( ctx );
  99
 100    FREE(tnl);
 101    ctx->swtnl_context = NULL;
 102 }
 103
 104
 105 void
 106 _tnl_InvalidateState( struct gl_context *ctx, GLuint new_state )
 107 {
 108    TNLcontext *tnl = TNL_CONTEXT(ctx);
 109    const struct gl_vertex_program *vp = ctx->VertexProgram._Current;
 110    const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
 111    GLuint i;
 112
 113    if (new_state & (_NEW_HINT | _NEW_PROGRAM)) {
 114       ASSERT(tnl->AllowVertexFog || tnl->AllowPixelFog);
 115       tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 116          || !tnl->AllowPixelFog) && !fp;
 117    }
 118
 119    tnl->pipeline.new_state |= new_state;
 120
 121    /* Calculate tnl->render_inputs.  This bitmask indicates which vertex
 122     * attributes need to be emitted to the rasterizer.
 123     */
 124    tnl->render_inputs_bitset = BITFIELD64_BIT(_TNL_ATTRIB_POS);
 125
 126    if (!fp || (fp->Base.InputsRead & FRAG_BIT_COL0)) {
 127      tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_COLOR0);
 128    }
 129
 130    if (_mesa_need_secondary_color(ctx))
 131      tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_COLOR1);
 132
 133    for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
 134      if (ctx->Texture._EnabledCoordUnits & (1 << i) ||
 135          (fp && fp->Base.InputsRead & FRAG_BIT_TEX(i))) {
 136        tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_TEX(i));
 137      }
 138    }
 139
 140    if (ctx->Fog.Enabled
 141        || (fp != NULL && (fp->Base.InputsRead & FRAG_BIT_FOGC) != 0)) {
 142       /* Either fixed-function fog or a fragment program needs fog coord.
 143        */
 144       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_FOG);
 145    }
 146
 147    if (ctx->Polygon.FrontMode != GL_FILL ||
 148        ctx->Polygon.BackMode != GL_FILL)
 149       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_EDGEFLAG);
 150
 151    if (ctx->RenderMode == GL_FEEDBACK)
 152       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_TEX0);
 153
 154    if (ctx->Point._Attenuated || ctx->VertexProgram.PointSizeEnabled)
 155       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_POINTSIZE);
 156
 157    /* check for varying vars which are written by the vertex program */
 158    if (vp) {
 159       GLuint i;
 160       for (i = 0; i < MAX_VARYING; i++) {
 161          if (vp->Base.OutputsWritten & BITFIELD64_BIT(VERT_RESULT_VAR0 + i)) {
 162             tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_GENERIC(i));
 163          }
 164       }
 165    }
 166 }
 167
 168
 169 void
 170 _tnl_wakeup( struct gl_context *ctx )
 171 {
 172    /* Assume we haven't been getting state updates either:
 173     */
 174    _tnl_InvalidateState( ctx, ~0 );
 175
 176 #if 0
 177    if (ctx->Light.ColorMaterialEnabled) {
 178       _mesa_update_color_material( ctx,
 179                                    ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
 180    }
 181 #endif
 182 }
 183
 184
 185
 186
 187 /**
 188  * Drivers call this function to tell the TCL module whether or not
 189  * it wants Normalized Device Coords (NDC) computed.  I.e. whether
 190  * we should "Divide-by-W".  Software renders will want that.
 191  */
 192 void
 193 _tnl_need_projected_coords( struct gl_context *ctx, GLboolean mode )
 194 {
 195    TNLcontext *tnl = TNL_CONTEXT(ctx);
 196    tnl->NeedNdcCoords = mode;
 197 }
 198
 199 void
 200 _tnl_allow_vertex_fog( struct gl_context *ctx, GLboolean value )
 201 {
 202    TNLcontext *tnl = TNL_CONTEXT(ctx);
 203    tnl->AllowVertexFog = value;
 204    tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 205       || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
 206
 207 }
 208
 209 void
 210 _tnl_allow_pixel_fog( struct gl_context *ctx, GLboolean value )
 211 {
 212    TNLcontext *tnl = TNL_CONTEXT(ctx);
 213    tnl->AllowPixelFog = value;
 214    tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
 215       || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
 216 }
 217