t_pipeline.c revision 16837e4219e03df36c34f08cee1967b946c44536
116837e4219e03df36c34f08cee1967b946c44536Keith Whitwell/* $Id: t_pipeline.c,v 1.17 2001/04/30 09:04:00 keithw Exp $ */ 223caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell 323caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell/* 423caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell * Mesa 3-D graphics library 523caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell * Version: 3.5 65e3bc0c2a2bcdf59949410f94c9b705fc1281ce8Jouk Jansen * 722144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes * Copyright (C) 1999-2001 Brian Paul All Rights Reserved. 85e3bc0c2a2bcdf59949410f94c9b705fc1281ce8Jouk Jansen * 923caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell * Permission is hereby granted, free of charge, to any person obtaining a 1023caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell * copy of this software and associated documentation files (the "Software"), 1123caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell * to deal in the Software without restriction, including without limitation 1223caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell * the rights to use, copy, modify, merge, publish, distribute, sublicense, 1323caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell * and/or sell copies of the Software, and to permit persons to whom the 1423caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell * Software is furnished to do so, subject to the following conditions: 155e3bc0c2a2bcdf59949410f94c9b705fc1281ce8Jouk Jansen * 1623caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell * The above copyright notice and this permission notice shall be included 1723caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell * in all copies or substantial portions of the Software. 185e3bc0c2a2bcdf59949410f94c9b705fc1281ce8Jouk Jansen * 1923caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 2023caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 2123caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 2223caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 2323caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 2423caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * 2622144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes * Authors: 2722144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes * Keith Whitwell <keithw@valinux.com> 2823caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell */ 2923caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell 3023caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell#include "glheader.h" 3123caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell#include "context.h" 3223caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell#include "mem.h" 3323caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell#include "mmath.h" 3423caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell#include "state.h" 355e3bc0c2a2bcdf59949410f94c9b705fc1281ce8Jouk Jansen#include "mtypes.h" 3623caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell 3723caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell#include "math/m_translate.h" 3823caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell#include "math/m_xform.h" 3923caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell 40cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell#include "t_context.h" 4123caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell#include "t_pipeline.h" 4223caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell 4323caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell 4422144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughesvoid _tnl_install_pipeline( GLcontext *ctx, 45cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell const struct gl_pipeline_stage **stages ) 4623caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell{ 4723caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell TNLcontext *tnl = TNL_CONTEXT(ctx); 48cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell struct gl_pipeline *pipe = &tnl->pipeline; 4923caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell GLuint i; 5023caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell 51cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell ASSERT(pipe->nr_stages == 0); 5223caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell 53cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell pipe->run_state_changes = ~0; 54cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell pipe->run_input_changes = ~0; 55cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell pipe->build_state_changes = ~0; 56cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell pipe->build_state_trigger = 0; 57cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell pipe->inputs = 0; 5823caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell 59cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell /* Create a writeable copy of each stage. 6023caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell */ 61cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell for (i = 0 ; i < MAX_PIPELINE_STAGES && stages[i] ; i++) { 62cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell MEMCPY( &pipe->stages[i], stages[i], sizeof( **stages )); 63cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell pipe->build_state_trigger |= pipe->stages[i].check_state; 6423caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell } 655e3bc0c2a2bcdf59949410f94c9b705fc1281ce8Jouk Jansen 66cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell pipe->nr_stages = i; 6723caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell} 6823caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell 69cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwellvoid _tnl_destroy_pipeline( GLcontext *ctx ) 7023caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell{ 7123caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell TNLcontext *tnl = TNL_CONTEXT(ctx); 72cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell GLuint i; 735e3bc0c2a2bcdf59949410f94c9b705fc1281ce8Jouk Jansen 7422144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes for (i = 0 ; i < tnl->pipeline.nr_stages ; i++) 75cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell tnl->pipeline.stages[i].destroy( &tnl->pipeline.stages[i] ); 765e3bc0c2a2bcdf59949410f94c9b705fc1281ce8Jouk Jansen 77cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell tnl->pipeline.nr_stages = 0; 7823caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell} 7923caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell 805c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell/* TODO: merge validate with run. 815c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell */ 82cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwellvoid _tnl_validate_pipeline( GLcontext *ctx ) 8323caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell{ 8423caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell TNLcontext *tnl = TNL_CONTEXT(ctx); 85cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell struct gl_pipeline *pipe = &tnl->pipeline; 865c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell struct gl_pipeline_stage *s = pipe->stages; 87cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell GLuint newstate = pipe->build_state_changes; 8823caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell GLuint generated = 0; 89cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell GLuint i; 905c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell GLuint changed_inputs = 0; 9123caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell 92cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell pipe->inputs = 0; 93cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell pipe->build_state_changes = 0; 9423caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell 955c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell for (i = pipe->nr_stages+1 ; --i ; s++) { 965c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell 975c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell s->changed_inputs |= s->inputs & changed_inputs; 9822144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes 9922144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes if (s->check_state & newstate) { 1005c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell if (s->active) { 1015c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell GLuint old_outputs = s->outputs; 1025c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell s->check(ctx, s); 1035c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell if (!s->active) 1045c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell changed_inputs |= old_outputs; 1055c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell } 10622144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes else 1075c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell s->check(ctx, s); 10823caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell } 10923caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell 1105c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell if (s->active) { 1115c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell pipe->inputs |= s->inputs & ~generated; 1125c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell generated |= s->outputs; 11322144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes } 11423caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell } 11523caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell} 11623caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell 11723caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell 11823caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell 119cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwellvoid _tnl_run_pipeline( GLcontext *ctx ) 12023caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell{ 12123caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell TNLcontext *tnl = TNL_CONTEXT(ctx); 1223004bf8fd70e0cf3f68c6ddbd78101d851a49ae2Keith Whitwell struct vertex_buffer *VB = &tnl->vb; 123cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell struct gl_pipeline *pipe = &tnl->pipeline; 1245c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell struct gl_pipeline_stage *s = pipe->stages; 125cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell GLuint changed_state = pipe->run_state_changes; 126cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell GLuint changed_inputs = pipe->run_input_changes; 127cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell GLboolean running = GL_TRUE; 128cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell GLuint i; 129cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell unsigned short __tmp; 13023caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell 131cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell /* Done elsewhere. 132cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell */ 133cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell ASSERT(pipe->build_state_changes == 0); 1345e3bc0c2a2bcdf59949410f94c9b705fc1281ce8Jouk Jansen 13516837e4219e03df36c34f08cee1967b946c44536Keith Whitwell/* _tnl_print_vert_flags( "run_pipeline, new inputs", changed_inputs ); */ 13616837e4219e03df36c34f08cee1967b946c44536Keith Whitwell/* _mesa_print_state( "run_pipeline, new state", changed_state ); */ 13716837e4219e03df36c34f08cee1967b946c44536Keith Whitwell 138cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell START_FAST_MATH(__tmp); 139709892459922a32096fe9dd8261d0d92337bb02fKeith Whitwell if (tnl->Driver.PipelineStart) 140709892459922a32096fe9dd8261d0d92337bb02fKeith Whitwell tnl->Driver.PipelineStart( ctx ); 1415e3bc0c2a2bcdf59949410f94c9b705fc1281ce8Jouk Jansen 142cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell /* If something changes in the pipeline, tag all subsequent stages 14322144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes * using this value for recalculation. 144cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * 145cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * Even inactive stages have their state and inputs examined to try 14622144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes * to keep cached data alive over state-changes. 147cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell */ 1485c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell for (i = pipe->nr_stages+1 ; --i ; s++) { 1495c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell s->changed_inputs |= s->inputs & changed_inputs; 15023caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell 1515c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell if (s->run_state & changed_state) { 1525c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell s->changed_inputs = s->inputs; 1539aff6cfdc37f83a2528463179ad0b50893bf0c58Keith Whitwell } 1545e3bc0c2a2bcdf59949410f94c9b705fc1281ce8Jouk Jansen 1555c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell if (s->active) { 156cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell if (running) { 15722144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes if (s->changed_inputs) 1585c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell changed_inputs |= s->outputs; 1595c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell 16016837e4219e03df36c34f08cee1967b946c44536Keith Whitwell if (0) 16116837e4219e03df36c34f08cee1967b946c44536Keith Whitwell fprintf(stderr, "run %s inputs %x\n", 16216837e4219e03df36c34f08cee1967b946c44536Keith Whitwell s->name, s->changed_inputs); 16316837e4219e03df36c34f08cee1967b946c44536Keith Whitwell 1645c1e7fa6ee72f4403d9ec9d12830dd689b966e71Keith Whitwell running = s->run( ctx, s ); 16516837e4219e03df36c34f08cee1967b946c44536Keith Whitwell s->changed_inputs = 0; /* readded this apr 30 */ 1663004bf8fd70e0cf3f68c6ddbd78101d851a49ae2Keith Whitwell VB->importable_data &= ~s->outputs; 167cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell } 16823caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell } 16923caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell } 170c6b2a92613a5110dbf387721af8ec505744183b9Keith Whitwell 171709892459922a32096fe9dd8261d0d92337bb02fKeith Whitwell if (tnl->Driver.PipelineFinish) 172709892459922a32096fe9dd8261d0d92337bb02fKeith Whitwell tnl->Driver.PipelineFinish( ctx ); 173cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell END_FAST_MATH(__tmp); 17423caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell 175cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell pipe->run_state_changes = 0; 176cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell pipe->run_input_changes = 0; 17723caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell} 17823caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell 17923caf20169ac38436ee9c13914f1d6aa7cf6bb5eKeith Whitwell 1805e3bc0c2a2bcdf59949410f94c9b705fc1281ce8Jouk Jansen 181cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell/* The default pipeline. This is useful for software rasterizers, and 182cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * simple hardware rasterizers. For customization, I don't recommend 183cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * tampering with the internals of these stages in the way that 184cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * drivers did in Mesa 3.4. These stages are basically black boxes, 18522144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes * and should be left intact. 186cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * 18722144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes * To customize the pipeline, consider: 188cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * 189cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * - removing redundant stages (making sure that the software rasterizer 190cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * can cope with this on fallback paths). An example is fog 191cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * coordinate generation, which is not required in the FX driver. 192cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * 193cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * - replacing general-purpose machine-independent stages with 194cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * general-purpose machine-specific stages. There is no example of 195cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * this to date, though it must be borne in mind that all subsequent 196cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * stages that reference the output of the new stage must cope with 197cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * any machine-specific data introduced. This may not be easy 198cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * unless there are no such stages (ie the new stage is the last in 199cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * the pipe). 200cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * 201cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * - inserting optimized (but specialized) stages ahead of the 202cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * general-purpose fallback implementation. For example, the old 203cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * fastpath mechanism, which only works when the VERT_ELT input is 204cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * available, can be duplicated by placing the fastpath stage at the 205cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * head of this pipeline. Such specialized stages are currently 206cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * constrained to have no outputs (ie. they must either finish the * 207cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * pipeline by returning GL_FALSE from run(), or do nothing). 208cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * 209cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell * Some work can be done to lift some of the restrictions in the final 21022144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes * case, if it becomes necessary to do so. 211cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell */ 212cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwellconst struct gl_pipeline_stage *_tnl_default_pipeline[] = { 21322144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes &_tnl_vertex_transform_stage, 21422144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes &_tnl_normal_transform_stage, 21522144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes &_tnl_lighting_stage, 21622144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes &_tnl_fog_coordinate_stage, 21722144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes &_tnl_texgen_stage, 21822144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes &_tnl_texture_transform_stage, 21922144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes &_tnl_point_attenuation_stage, 220cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell &_tnl_render_stage, 221cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell 0 222cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290Keith Whitwell}; 223