From 2702c90d7a39fca2a3319c5e915fd290cb31fc70 Mon Sep 17 00:00:00 2001 From: Radosław Kujawa Date: Fri, 17 Jul 2026 14:54:32 +0200 Subject: Initial import. --- src/mesa/tnl/t_pipeline.c | 216 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 216 insertions(+) create mode 100644 src/mesa/tnl/t_pipeline.c (limited to 'src/mesa/tnl/t_pipeline.c') diff --git a/src/mesa/tnl/t_pipeline.c b/src/mesa/tnl/t_pipeline.c new file mode 100644 index 0000000..e90e21b --- /dev/null +++ b/src/mesa/tnl/t_pipeline.c @@ -0,0 +1,216 @@ + +/* + * Mesa 3-D graphics library + * Version: 5.1 + * + * Copyright (C) 1999-2003 Brian Paul All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN + * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: + * Keith Whitwell + */ + +#include "glheader.h" +#include "context.h" +#include "imports.h" +#include "state.h" +#include "mtypes.h" + +#include "math/m_translate.h" +#include "math/m_xform.h" + +#include "t_context.h" +#include "t_pipeline.h" + + +void _tnl_install_pipeline( GLcontext *ctx, + const struct tnl_pipeline_stage **stages ) +{ + TNLcontext *tnl = TNL_CONTEXT(ctx); + struct tnl_pipeline *pipe = &tnl->pipeline; + GLuint i; + + ASSERT(pipe->nr_stages == 0); + + pipe->run_state_changes = ~0; + pipe->run_input_changes = ~0; + pipe->build_state_changes = ~0; + pipe->build_state_trigger = 0; + pipe->inputs = 0; + + /* Create a writeable copy of each stage. + */ + for (i = 0 ; i < MAX_PIPELINE_STAGES && stages[i] ; i++) { + MEMCPY( &pipe->stages[i], stages[i], sizeof( **stages )); + pipe->build_state_trigger |= pipe->stages[i].check_state; + } + + MEMSET( &pipe->stages[i], 0, sizeof( **stages )); + + pipe->nr_stages = i; +} + +void _tnl_destroy_pipeline( GLcontext *ctx ) +{ + TNLcontext *tnl = TNL_CONTEXT(ctx); + GLuint i; + + for (i = 0 ; i < tnl->pipeline.nr_stages ; i++) + tnl->pipeline.stages[i].destroy( &tnl->pipeline.stages[i] ); + + tnl->pipeline.nr_stages = 0; +} + +/* TODO: merge validate with run. + */ +void _tnl_validate_pipeline( GLcontext *ctx ) +{ + TNLcontext *tnl = TNL_CONTEXT(ctx); + struct tnl_pipeline *pipe = &tnl->pipeline; + struct tnl_pipeline_stage *s = pipe->stages; + GLuint newstate = pipe->build_state_changes; + GLuint generated = 0; + GLuint changed_inputs = 0; + + pipe->inputs = 0; + pipe->build_state_changes = 0; + + for ( ; s->check ; s++) { + + s->changed_inputs |= s->inputs & changed_inputs; + + if (s->check_state & newstate) { + if (s->active) { + GLuint old_outputs = s->outputs; + s->check(ctx, s); + if (!s->active) + changed_inputs |= old_outputs; + } + else + s->check(ctx, s); + } + + if (s->active) { + pipe->inputs |= s->inputs & ~generated; + generated |= s->outputs; + } + } +} + + + +void _tnl_run_pipeline( GLcontext *ctx ) +{ + TNLcontext *tnl = TNL_CONTEXT(ctx); + struct tnl_pipeline *pipe = &tnl->pipeline; + struct tnl_pipeline_stage *s = pipe->stages; + GLuint changed_state = pipe->run_state_changes; + GLuint changed_inputs = pipe->run_input_changes; + GLboolean running = GL_TRUE; +#ifdef HAVE_FAST_MATH + unsigned short __tmp; +#endif + + if (!tnl->vb.Count) + return; + + pipe->run_state_changes = 0; + pipe->run_input_changes = 0; + + /* Done elsewhere. + */ + ASSERT(pipe->build_state_changes == 0); + +#ifdef HAVE_FAST_MATH + START_FAST_MATH(__tmp); +#endif + + /* If something changes in the pipeline, tag all subsequent stages + * using this value for recalculation. Inactive stages have their + * state and inputs examined to try to keep cached data alive over + * state-changes. + */ + for ( ; s->run ; s++) { + s->changed_inputs |= s->inputs & changed_inputs; + + if (s->run_state & changed_state) + s->changed_inputs = s->inputs; + + if (s->active && running) { + if (s->changed_inputs) + changed_inputs |= s->outputs; + + running = s->run( ctx, s ); + + s->changed_inputs = 0; + } + } + +#ifdef HAVE_FAST_MATH + END_FAST_MATH(__tmp); +#endif +} + + + +/* The default pipeline. This is useful for software rasterizers, and + * simple hardware rasterizers. For customization, I don't recommend + * tampering with the internals of these stages in the way that + * drivers did in Mesa 3.4. These stages are basically black boxes, + * and should be left intact. + * + * To customize the pipeline, consider: + * + * - removing redundant stages (making sure that the software rasterizer + * can cope with this on fallback paths). An example is fog + * coordinate generation, which is not required in the FX driver. + * + * - replacing general-purpose machine-independent stages with + * general-purpose machine-specific stages. There is no example of + * this to date, though it must be borne in mind that all subsequent + * stages that reference the output of the new stage must cope with + * any machine-specific data introduced. This may not be easy + * unless there are no such stages (ie the new stage is the last in + * the pipe). + * + * - inserting optimized (but specialized) stages ahead of the + * general-purpose fallback implementation. For example, the old + * fastpath mechanism, which only works when the VB->Elts input is + * available, can be duplicated by placing the fastpath stage at the + * head of this pipeline. Such specialized stages are currently + * constrained to have no outputs (ie. they must either finish the * + * pipeline by returning GL_FALSE from run(), or do nothing). + * + * Some work can be done to lift some of the restrictions in the final + * case, if it becomes necessary to do so. + */ +const struct tnl_pipeline_stage *_tnl_default_pipeline[] = { + &_tnl_vertex_transform_stage, + &_tnl_normal_transform_stage, + &_tnl_lighting_stage, + &_tnl_fog_coordinate_stage, + &_tnl_texgen_stage, + &_tnl_texture_transform_stage, + &_tnl_point_attenuation_stage, +#if defined(FEATURE_NV_vertex_program) || defined(FEATURE_ARB_vertex_program) + &_tnl_vertex_program_stage, +#endif + &_tnl_render_stage, + 0 +}; -- cgit