1 /*
2 * Mesa 3-D graphics library
3 * Version: 6.5.3
4 *
5 * Copyright (C) 1999-2007 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 "main/glheader.h"
29 #include "main/context.h"
30 #include "main/imports.h"
31 #include "main/mtypes.h"
32
33 #include "t_context.h"
34 #include "t_pipeline.h"
35 #include "t_vp_build.h"
36 #include "t_vertex.h"
37
_tnl_install_pipeline(struct gl_context * ctx,const struct tnl_pipeline_stage ** stages)38 void _tnl_install_pipeline( struct gl_context *ctx,
39 const struct tnl_pipeline_stage **stages )
40 {
41 TNLcontext *tnl = TNL_CONTEXT(ctx);
42 GLuint i;
43
44 tnl->pipeline.new_state = ~0;
45
46 /* Create a writeable copy of each stage.
47 */
48 for (i = 0 ; i < MAX_PIPELINE_STAGES && stages[i] ; i++) {
49 struct tnl_pipeline_stage *s = &tnl->pipeline.stages[i];
50 memcpy(s, stages[i], sizeof(*s));
51 if (s->create)
52 s->create(ctx, s);
53 }
54
55 tnl->pipeline.nr_stages = i;
56 }
57
_tnl_destroy_pipeline(struct gl_context * ctx)58 void _tnl_destroy_pipeline( struct gl_context *ctx )
59 {
60 TNLcontext *tnl = TNL_CONTEXT(ctx);
61 GLuint i;
62
63 for (i = 0 ; i < tnl->pipeline.nr_stages ; i++) {
64 struct tnl_pipeline_stage *s = &tnl->pipeline.stages[i];
65 if (s->destroy)
66 s->destroy(s);
67 }
68
69 tnl->pipeline.nr_stages = 0;
70 }
71
72
73
check_input_changes(struct gl_context * ctx)74 static GLuint check_input_changes( struct gl_context *ctx )
75 {
76 TNLcontext *tnl = TNL_CONTEXT(ctx);
77 GLuint i;
78
79 for (i = 0; i <= _TNL_LAST_MAT; i++) {
80 if (tnl->vb.AttribPtr[i]->size != tnl->pipeline.last_attrib_size[i] ||
81 tnl->vb.AttribPtr[i]->stride != tnl->pipeline.last_attrib_stride[i]) {
82 tnl->pipeline.last_attrib_size[i] = tnl->vb.AttribPtr[i]->size;
83 tnl->pipeline.last_attrib_stride[i] = tnl->vb.AttribPtr[i]->stride;
84 tnl->pipeline.input_changes |= 1<<i;
85 }
86 }
87
88 return tnl->pipeline.input_changes;
89 }
90
91
check_output_changes(struct gl_context * ctx)92 static GLuint check_output_changes( struct gl_context *ctx )
93 {
94 #if 0
95 TNLcontext *tnl = TNL_CONTEXT(ctx);
96
97 for (i = 0; i < VERT_RESULT_MAX; i++) {
98 if (tnl->vb.ResultPtr[i]->size != tnl->last_result_size[i] ||
99 tnl->vb.ResultPtr[i]->stride != tnl->last_result_stride[i]) {
100 tnl->last_result_size[i] = tnl->vb.ResultPtr[i]->size;
101 tnl->last_result_stride[i] = tnl->vb.ResultPtr[i]->stride;
102 tnl->pipeline.output_changes |= 1<<i;
103 }
104 }
105
106 if (tnl->pipeline.output_changes)
107 tnl->Driver.NotifyOutputChanges( ctx, tnl->pipeline.output_changes );
108
109 return tnl->pipeline.output_changes;
110 #else
111 return ~0;
112 #endif
113 }
114
115
_tnl_run_pipeline(struct gl_context * ctx)116 void _tnl_run_pipeline( struct gl_context *ctx )
117 {
118 TNLcontext *tnl = TNL_CONTEXT(ctx);
119 unsigned short __tmp;
120 GLuint i;
121
122 if (!tnl->vb.Count)
123 return;
124
125 /* Check for changed input sizes or change in stride to/from zero
126 * (ie const or non-const).
127 */
128 if (check_input_changes( ctx ) || tnl->pipeline.new_state) {
129 if (ctx->VertexProgram._MaintainTnlProgram)
130 _tnl_UpdateFixedFunctionProgram( ctx );
131
132 for (i = 0; i < tnl->pipeline.nr_stages ; i++) {
133 struct tnl_pipeline_stage *s = &tnl->pipeline.stages[i];
134 if (s->validate)
135 s->validate( ctx, s );
136 }
137
138 tnl->pipeline.new_state = 0;
139 tnl->pipeline.input_changes = 0;
140
141 /* Pipeline can only change its output in response to either a
142 * statechange or an input size/stride change. No other changes
143 * are allowed.
144 */
145 if (check_output_changes( ctx ))
146 _tnl_notify_pipeline_output_change( ctx );
147 }
148
149 #ifndef _OPENMP
150 /* Don't adjust FPU precision mode in case multiple threads are to be used.
151 * This would require that the additional threads also changed the FPU mode
152 * which is quite a mess as this had to be done in all parallelized sections;
153 * otherwise the master thread and all other threads are running in different
154 * modes, producing inconsistent results.
155 * Note that all x64 implementations don't define/use START_FAST_MATH, so
156 * this is "hack" is only used in i386 mode
157 */
158 START_FAST_MATH(__tmp);
159 #endif
160
161 for (i = 0; i < tnl->pipeline.nr_stages ; i++) {
162 struct tnl_pipeline_stage *s = &tnl->pipeline.stages[i];
163 if (!s->run( ctx, s ))
164 break;
165 }
166
167 #ifndef _OPENMP
168 END_FAST_MATH(__tmp);
169 #endif
170 }
171
172
173
174 /* The default pipeline. This is useful for software rasterizers, and
175 * simple hardware rasterizers. For customization, I don't recommend
176 * tampering with the internals of these stages in the way that
177 * drivers did in Mesa 3.4. These stages are basically black boxes,
178 * and should be left intact.
179 *
180 * To customize the pipeline, consider:
181 *
182 * - removing redundant stages (making sure that the software rasterizer
183 * can cope with this on fallback paths). An example is fog
184 * coordinate generation, which is not required in the FX driver.
185 *
186 * - replacing general-purpose machine-independent stages with
187 * general-purpose machine-specific stages. There is no example of
188 * this to date, though it must be borne in mind that all subsequent
189 * stages that reference the output of the new stage must cope with
190 * any machine-specific data introduced. This may not be easy
191 * unless there are no such stages (ie the new stage is the last in
192 * the pipe).
193 *
194 * - inserting optimized (but specialized) stages ahead of the
195 * general-purpose fallback implementation. For example, the old
196 * fastpath mechanism, which only works when the VB->Elts input is
197 * available, can be duplicated by placing the fastpath stage at the
198 * head of this pipeline. Such specialized stages are currently
199 * constrained to have no outputs (ie. they must either finish the *
200 * pipeline by returning GL_FALSE from run(), or do nothing).
201 *
202 * Some work can be done to lift some of the restrictions in the final
203 * case, if it becomes necessary to do so.
204 */
205 const struct tnl_pipeline_stage *_tnl_default_pipeline[] = {
206 &_tnl_vertex_transform_stage,
207 &_tnl_normal_transform_stage,
208 &_tnl_lighting_stage,
209 &_tnl_texgen_stage,
210 &_tnl_texture_transform_stage,
211 &_tnl_point_attenuation_stage,
212 &_tnl_vertex_program_stage,
213 &_tnl_fog_coordinate_stage,
214 &_tnl_render_stage,
215 NULL
216 };
217
218 const struct tnl_pipeline_stage *_tnl_vp_pipeline[] = {
219 &_tnl_vertex_program_stage,
220 &_tnl_render_stage,
221 NULL
222 };
223