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 (at) 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 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 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 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 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 } 114 115 116 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
