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#include "util/simple_list.h"
40
41#include "tnl.h"
42#include "t_context.h"
43#include "t_pipeline.h"
44
45#include "vbo/vbo.h"
46
47GLboolean
48_tnl_CreateContext( struct gl_context *ctx )
49{
50   TNLcontext *tnl;
51   GLuint i;
52
53   /* Create the TNLcontext structure
54    */
55   ctx->swtnl_context = tnl = calloc(1, sizeof(TNLcontext));
56
57   if (!tnl) {
58      return GL_FALSE;
59   }
60
61   /* Initialize the VB.
62    */
63   tnl->vb.Size = ctx->Const.MaxArrayLockSize + MAX_CLIPPED_VERTICES;
64
65
66   /* Initialize tnl state.
67    */
68   if (ctx->VertexProgram._MaintainTnlProgram) {
69      _tnl_install_pipeline( ctx, _tnl_vp_pipeline );
70   } else {
71      _tnl_install_pipeline( ctx, _tnl_default_pipeline );
72   }
73
74   _math_matrix_ctr(&tnl->_WindowMap);
75
76   tnl->NeedNdcCoords = GL_TRUE;
77   tnl->AllowVertexFog = GL_TRUE;
78   tnl->AllowPixelFog = GL_TRUE;
79
80   /* Set a few default values in the driver struct.
81    */
82   tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
83   tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
84   tnl->Driver.NotifyMaterialChange = _tnl_validate_shine_tables;
85
86   tnl->nr_blocks = 0;
87
88   /* Lighting miscellaneous */
89   tnl->_ShineTabList = MALLOC_STRUCT( tnl_shine_tab );
90   make_empty_list( tnl->_ShineTabList );
91   /* Allocate 10 (arbitrary) shininess lookup tables */
92   for (i = 0 ; i < 10 ; i++) {
93      struct tnl_shine_tab *s = MALLOC_STRUCT( tnl_shine_tab );
94      s->shininess = -1;
95      s->refcount = 0;
96      insert_at_tail( tnl->_ShineTabList, s );
97   }
98
99   /* plug in the VBO drawing function */
100   vbo_set_draw_func(ctx, _tnl_draw_prims);
101
102   _math_init_transformation();
103   _math_init_translate();
104
105   return GL_TRUE;
106}
107
108
109void
110_tnl_DestroyContext( struct gl_context *ctx )
111{
112   struct tnl_shine_tab *s, *tmps;
113   TNLcontext *tnl = TNL_CONTEXT(ctx);
114
115   _math_matrix_dtr(&tnl->_WindowMap);
116
117   /* Free lighting shininess exponentiation table */
118   foreach_s( s, tmps, tnl->_ShineTabList ) {
119      free( s );
120   }
121   free( tnl->_ShineTabList );
122
123   _tnl_destroy_pipeline( ctx );
124
125   free(tnl);
126   ctx->swtnl_context = NULL;
127}
128
129
130void
131_tnl_InvalidateState( struct gl_context *ctx, GLuint new_state )
132{
133   TNLcontext *tnl = TNL_CONTEXT(ctx);
134   const struct gl_program *vp = ctx->VertexProgram._Current;
135   const struct gl_program *fp = ctx->FragmentProgram._Current;
136   GLuint i;
137
138   if (new_state & (_NEW_HINT | _NEW_PROGRAM)) {
139      assert(tnl->AllowVertexFog || tnl->AllowPixelFog);
140      tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
141         || !tnl->AllowPixelFog) && !fp;
142   }
143
144   tnl->pipeline.new_state |= new_state;
145
146   /* Calculate tnl->render_inputs.  This bitmask indicates which vertex
147    * attributes need to be emitted to the rasterizer.
148    */
149   tnl->render_inputs_bitset = BITFIELD64_BIT(_TNL_ATTRIB_POS);
150
151   if (!fp || (fp->info.inputs_read & VARYING_BIT_COL0)) {
152     tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_COLOR0);
153   }
154
155   if (_mesa_need_secondary_color(ctx))
156     tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_COLOR1);
157
158   for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
159     if (ctx->Texture._EnabledCoordUnits & (1 << i) ||
160	 (fp && fp->info.inputs_read & VARYING_BIT_TEX(i))) {
161       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_TEX(i));
162     }
163   }
164
165   if (ctx->Fog.Enabled
166       || (fp != NULL && (fp->info.inputs_read & VARYING_BIT_FOGC) != 0)) {
167      /* Either fixed-function fog or a fragment program needs fog coord.
168       */
169      tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_FOG);
170   }
171
172   if (ctx->Polygon.FrontMode != GL_FILL ||
173       ctx->Polygon.BackMode != GL_FILL)
174      tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_EDGEFLAG);
175
176   if (ctx->RenderMode == GL_FEEDBACK)
177      tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_TEX0);
178
179   if (ctx->Point._Attenuated || ctx->VertexProgram.PointSizeEnabled)
180      tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_POINTSIZE);
181
182   /* check for varying vars which are written by the vertex program */
183   if (vp) {
184      GLuint i;
185      for (i = 0; i < MAX_VARYING; i++) {
186	 if (vp->info.outputs_written &
187             BITFIELD64_BIT(VARYING_SLOT_VAR0 + i)) {
188            tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_GENERIC(i));
189         }
190      }
191   }
192
193   if (new_state & (_NEW_VIEWPORT | _NEW_BUFFERS)) {
194      float scale[3], translate[3];
195      _mesa_get_viewport_xform(ctx, 0, scale, translate);
196      _math_matrix_viewport(&tnl->_WindowMap, scale, translate,
197                            ctx->DrawBuffer->_DepthMaxF);
198   }
199}
200
201
202void
203_tnl_wakeup( struct gl_context *ctx )
204{
205   /* Assume we haven't been getting state updates either:
206    */
207   _tnl_InvalidateState( ctx, ~0 );
208
209#if 0
210   if (ctx->Light.ColorMaterialEnabled) {
211      _mesa_update_color_material( ctx,
212				   ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
213   }
214#endif
215}
216
217
218
219
220/**
221 * Drivers call this function to tell the TCL module whether or not
222 * it wants Normalized Device Coords (NDC) computed.  I.e. whether
223 * we should "Divide-by-W".  Software renders will want that.
224 */
225void
226_tnl_need_projected_coords( struct gl_context *ctx, GLboolean mode )
227{
228   TNLcontext *tnl = TNL_CONTEXT(ctx);
229   tnl->NeedNdcCoords = mode;
230}
231
232void
233_tnl_allow_vertex_fog( struct gl_context *ctx, GLboolean value )
234{
235   TNLcontext *tnl = TNL_CONTEXT(ctx);
236   tnl->AllowVertexFog = value;
237   tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
238      || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
239
240}
241
242void
243_tnl_allow_pixel_fog( struct gl_context *ctx, GLboolean value )
244{
245   TNLcontext *tnl = TNL_CONTEXT(ctx);
246   tnl->AllowPixelFog = value;
247   tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
248      || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
249}
250
251