t_context.c revision c1f859d4 
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
36#include "tnl.h"
37#include "t_context.h"
38#include "t_pipeline.h"
39#include "t_vp_build.h"
40
41#include "vbo/vbo.h"
42
43GLboolean
44_tnl_CreateContext( GLcontext *ctx )
45{
46   TNLcontext *tnl;
47
48   /* Create the TNLcontext structure
49    */
50   ctx->swtnl_context = tnl = (TNLcontext *) CALLOC( sizeof(TNLcontext) );
51
52   if (!tnl) {
53      return GL_FALSE;
54   }
55
56   /* Initialize the VB.
57    */
58   tnl->vb.Size = ctx->Const.MaxArrayLockSize + MAX_CLIPPED_VERTICES;
59
60
61   /* Initialize tnl state.
62    */
63   if (ctx->VertexProgram._MaintainTnlProgram) {
64      _tnl_install_pipeline( ctx, _tnl_vp_pipeline );
65   } else {
66      _tnl_install_pipeline( ctx, _tnl_default_pipeline );
67   }
68
69   tnl->NeedNdcCoords = GL_TRUE;
70   tnl->AllowVertexFog = GL_TRUE;
71   tnl->AllowPixelFog = GL_TRUE;
72
73   /* Set a few default values in the driver struct.
74    */
75   tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
76   tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
77   tnl->Driver.NotifyMaterialChange = _mesa_validate_all_lighting_tables;
78
79   tnl->nr_blocks = 0;
80
81   return GL_TRUE;
82}
83
84
85void
86_tnl_DestroyContext( GLcontext *ctx )
87{
88   TNLcontext *tnl = TNL_CONTEXT(ctx);
89
90   _tnl_destroy_pipeline( ctx );
91
92   FREE(tnl);
93   ctx->swtnl_context = NULL;
94}
95
96
97void
98_tnl_InvalidateState( GLcontext *ctx, GLuint new_state )
99{
100   TNLcontext *tnl = TNL_CONTEXT(ctx);
101   const struct gl_vertex_program *vp = ctx->VertexProgram._Current;
102   const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
103
104   if (new_state & (_NEW_HINT | _NEW_PROGRAM)) {
105      ASSERT(tnl->AllowVertexFog || tnl->AllowPixelFog);
106      tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
107         || !tnl->AllowPixelFog) && !fp;
108   }
109
110   tnl->pipeline.new_state |= new_state;
111
112   /* Calculate tnl->render_inputs.  This bitmask indicates which vertex
113    * attributes need to be emitted to the rasterizer.
114    */
115   if (ctx->Visual.rgbMode) {
116      GLuint i;
117
118      RENDERINPUTS_ZERO( tnl->render_inputs_bitset );
119      RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POS );
120
121      if (!fp || (fp->Base.InputsRead & FRAG_BIT_COL0)) {
122         RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR0 );
123      }
124
125      if (NEED_SECONDARY_COLOR(ctx))
126         RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR1 );
127
128      for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
129         if (ctx->Texture._EnabledCoordUnits & (1 << i) ||
130             (fp && fp->Base.InputsRead & FRAG_BIT_TEX(i))) {
131            RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_TEX(i) );
132         }
133      }
134   }
135   else {
136      RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POS );
137      RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR_INDEX );
138   }
139
140   if (ctx->Fog.Enabled) {
141      /* fixed-function fog */
142      RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_FOG );
143   }
144   else if (ctx->FragmentProgram._Current) {
145      struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
146      if (fp) {
147         if (fp->FogOption != GL_NONE || (fp->Base.InputsRead & FRAG_BIT_FOGC)) {
148            /* fragment program needs fog coord */
149            RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_FOG );
150         }
151      }
152   }
153
154   if (ctx->Polygon.FrontMode != GL_FILL ||
155       ctx->Polygon.BackMode != GL_FILL)
156      RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_EDGEFLAG );
157
158   if (ctx->RenderMode == GL_FEEDBACK)
159      RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_TEX0 );
160
161   if (ctx->Point._Attenuated ||
162       (ctx->VertexProgram._Enabled && ctx->VertexProgram.PointSizeEnabled))
163      RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POINTSIZE );
164
165   /* check for varying vars which are written by the vertex program */
166   if (vp) {
167      GLuint i;
168      for (i = 0; i < MAX_VARYING; i++) {
169         if (vp->Base.OutputsWritten & (1 << (VERT_RESULT_VAR0 + i))) {
170            RENDERINPUTS_SET(tnl->render_inputs_bitset,
171                             _TNL_ATTRIB_GENERIC(i));
172         }
173      }
174   }
175}
176
177
178void
179_tnl_wakeup( GLcontext *ctx )
180{
181   /* Assume we haven't been getting state updates either:
182    */
183   _tnl_InvalidateState( ctx, ~0 );
184
185#if 0
186   if (ctx->Light.ColorMaterialEnabled) {
187      _mesa_update_color_material( ctx,
188				   ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
189   }
190#endif
191}
192
193
194
195
196/**
197 * Drivers call this function to tell the TCL module whether or not
198 * it wants Normalized Device Coords (NDC) computed.  I.e. whether
199 * we should "Divide-by-W".  Software renders will want that.
200 */
201void
202_tnl_need_projected_coords( GLcontext *ctx, GLboolean mode )
203{
204   TNLcontext *tnl = TNL_CONTEXT(ctx);
205   tnl->NeedNdcCoords = mode;
206}
207
208void
209_tnl_allow_vertex_fog( GLcontext *ctx, GLboolean value )
210{
211   TNLcontext *tnl = TNL_CONTEXT(ctx);
212   tnl->AllowVertexFog = value;
213   tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
214      || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
215
216}
217
218void
219_tnl_allow_pixel_fog( GLcontext *ctx, GLboolean value )
220{
221   TNLcontext *tnl = TNL_CONTEXT(ctx);
222   tnl->AllowPixelFog = value;
223   tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
224      || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
225}
226
227