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
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#include "util/u_memory.h"
41
42#include "tnl.h"
43#include "t_context.h"
44#include "t_pipeline.h"
45
46#include "vbo/vbo.h"
47
48GLboolean
49_tnl_CreateContext( struct gl_context *ctx )
50{
51   TNLcontext *tnl;
52   GLuint i;
53
54   /* Create the TNLcontext structure
55    */
56   ctx->swtnl_context = tnl = calloc(1, sizeof(TNLcontext));
57
58   if (!tnl) {
59      return GL_FALSE;
60   }
61
62   /* Initialize the VB.
63    */
64   tnl->vb.Size = ctx->Const.MaxArrayLockSize + MAX_CLIPPED_VERTICES;
65
66
67   /* Initialize tnl state.
68    */
69   if (ctx->VertexProgram._MaintainTnlProgram) {
70      _tnl_install_pipeline( ctx, _tnl_vp_pipeline );
71   } else {
72      _tnl_install_pipeline( ctx, _tnl_default_pipeline );
73   }
74
75   _math_matrix_ctr(&tnl->_WindowMap);
76
77   tnl->NeedNdcCoords = GL_TRUE;
78   tnl->AllowVertexFog = GL_TRUE;
79   tnl->AllowPixelFog = GL_TRUE;
80
81   /* Set a few default values in the driver struct.
82    */
83   tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
84   tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
85   tnl->Driver.NotifyMaterialChange = _tnl_validate_shine_tables;
86
87   tnl->nr_blocks = 0;
88
89   /* Lighting miscellaneous */
90   tnl->_ShineTabList = MALLOC_STRUCT( tnl_shine_tab );
91   make_empty_list( tnl->_ShineTabList );
92   /* Allocate 10 (arbitrary) shininess lookup tables */
93   for (i = 0 ; i < 10 ; i++) {
94      struct tnl_shine_tab *s = MALLOC_STRUCT( tnl_shine_tab );
95      s->shininess = -1;
96      s->refcount = 0;
97      insert_at_tail( tnl->_ShineTabList, s );
98   }
99
100   _math_init_transformation();
101   _math_init_translate();
102
103   /* Keep our list of tnl_vertex_array inputs */
104   _tnl_init_inputs(&tnl->draw_arrays);
105
106   return GL_TRUE;
107}
108
109
110void
111_tnl_DestroyContext( struct gl_context *ctx )
112{
113   struct tnl_shine_tab *s, *tmps;
114   TNLcontext *tnl = TNL_CONTEXT(ctx);
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
129void
130_tnl_InvalidateState( struct gl_context *ctx, GLuint new_state )
131{
132   TNLcontext *tnl = TNL_CONTEXT(ctx);
133   const struct gl_program *vp = ctx->VertexProgram._Current;
134   const struct gl_program *fp = ctx->FragmentProgram._Current;
135   GLuint i;
136
137   if (new_state & (_NEW_LIGHT_CONSTANTS | _NEW_MATERIAL))
138      _mesa_update_light_materials(ctx);
139
140   if (new_state & (_NEW_HINT | _NEW_PROGRAM)) {
141      assert(tnl->AllowVertexFog || tnl->AllowPixelFog);
142      tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
143         || !tnl->AllowPixelFog) && !fp;
144   }
145
146   tnl->pipeline.new_state |= new_state;
147
148   /* Calculate tnl->render_inputs.  This bitmask indicates which vertex
149    * attributes need to be emitted to the rasterizer.
150    */
151   tnl->render_inputs_bitset = BITFIELD64_BIT(_TNL_ATTRIB_POS);
152
153   if (!fp || (fp->info.inputs_read & VARYING_BIT_COL0)) {
154     tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_COLOR0);
155   }
156
157   if (_mesa_need_secondary_color(ctx))
158     tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_COLOR1);
159
160   for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
161     if (ctx->Texture._EnabledCoordUnits & (1 << i) ||
162	 (fp && fp->info.inputs_read & VARYING_BIT_TEX(i)) ||
163         _mesa_ati_fragment_shader_enabled(ctx)) {
164       tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_TEX(i));
165     }
166   }
167
168   if (ctx->Fog.Enabled
169       || (fp != NULL && (fp->info.inputs_read & VARYING_BIT_FOGC) != 0)) {
170      /* Either fixed-function fog or a fragment program needs fog coord.
171       */
172      tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_FOG);
173   }
174
175   if (ctx->Polygon.FrontMode != GL_FILL ||
176       ctx->Polygon.BackMode != GL_FILL)
177      tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_EDGEFLAG);
178
179   if (ctx->RenderMode == GL_FEEDBACK)
180      tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_TEX0);
181
182   if (ctx->Point._Attenuated || ctx->VertexProgram.PointSizeEnabled)
183      tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_POINTSIZE);
184
185   /* check for varying vars which are written by the vertex program */
186   if (vp) {
187      GLuint i;
188      for (i = 0; i < MAX_VARYING; i++) {
189	 if (vp->info.outputs_written &
190             BITFIELD64_BIT(VARYING_SLOT_VAR0 + i)) {
191            tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_GENERIC(i));
192         }
193      }
194   }
195
196   if (new_state & (_NEW_VIEWPORT | _NEW_BUFFERS)) {
197      float scale[3], translate[3];
198      _mesa_get_viewport_xform(ctx, 0, scale, translate);
199      _math_matrix_viewport(&tnl->_WindowMap, scale, translate,
200                            ctx->DrawBuffer->_DepthMaxF);
201   }
202}
203
204
205void
206_tnl_wakeup( struct gl_context *ctx )
207{
208   /* Assume we haven't been getting state updates either:
209    */
210   _tnl_InvalidateState( ctx, ~0 );
211
212#if 0
213   if (ctx->Light.ColorMaterialEnabled) {
214      _mesa_update_color_material( ctx,
215				   ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
216   }
217#endif
218}
219
220
221
222
223/**
224 * Drivers call this function to tell the TCL module whether or not
225 * it wants Normalized Device Coords (NDC) computed.  I.e. whether
226 * we should "Divide-by-W".  Software renders will want that.
227 */
228void
229_tnl_need_projected_coords( struct gl_context *ctx, GLboolean mode )
230{
231   TNLcontext *tnl = TNL_CONTEXT(ctx);
232   tnl->NeedNdcCoords = mode;
233}
234
235void
236_tnl_allow_vertex_fog( struct gl_context *ctx, GLboolean value )
237{
238   TNLcontext *tnl = TNL_CONTEXT(ctx);
239   tnl->AllowVertexFog = value;
240   tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
241      || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
242
243}
244
245void
246_tnl_allow_pixel_fog( struct gl_context *ctx, GLboolean value )
247{
248   TNLcontext *tnl = TNL_CONTEXT(ctx);
249   tnl->AllowPixelFog = value;
250   tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
251      || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
252}
253
254