Subversion Repositories Kolibri OS

Rev

Go to most recent revision | Blame | Last modification | View Log | Download | RSS feed

  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.  
  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.    START_FAST_MATH(__tmp);
  150.  
  151.    for (i = 0; i < tnl->pipeline.nr_stages ; i++) {
  152.       struct tnl_pipeline_stage *s = &tnl->pipeline.stages[i];
  153.       if (!s->run( ctx, s ))
  154.          break;
  155.    }
  156.  
  157.    END_FAST_MATH(__tmp);
  158. }
  159.  
  160.  
  161.  
  162. /* The default pipeline.  This is useful for software rasterizers, and
  163.  * simple hardware rasterizers.  For customization, I don't recommend
  164.  * tampering with the internals of these stages in the way that
  165.  * drivers did in Mesa 3.4.  These stages are basically black boxes,
  166.  * and should be left intact.
  167.  *
  168.  * To customize the pipeline, consider:
  169.  *
  170.  * - removing redundant stages (making sure that the software rasterizer
  171.  *   can cope with this on fallback paths).  An example is fog
  172.  *   coordinate generation, which is not required in the FX driver.
  173.  *
  174.  * - replacing general-purpose machine-independent stages with
  175.  *   general-purpose machine-specific stages.  There is no example of
  176.  *   this to date, though it must be borne in mind that all subsequent
  177.  *   stages that reference the output of the new stage must cope with
  178.  *   any machine-specific data introduced.  This may not be easy
  179.  *   unless there are no such stages (ie the new stage is the last in
  180.  *   the pipe).
  181.  *
  182.  * - inserting optimized (but specialized) stages ahead of the
  183.  *   general-purpose fallback implementation.  For example, the old
  184.  *   fastpath mechanism, which only works when the VB->Elts input is
  185.  *   available, can be duplicated by placing the fastpath stage at the
  186.  *   head of this pipeline.  Such specialized stages are currently
  187.  *   constrained to have no outputs (ie. they must either finish the *
  188.  *   pipeline by returning GL_FALSE from run(), or do nothing).
  189.  *
  190.  * Some work can be done to lift some of the restrictions in the final
  191.  * case, if it becomes necessary to do so.
  192.  */
  193. const struct tnl_pipeline_stage *_tnl_default_pipeline[] = {
  194.    &_tnl_vertex_transform_stage,
  195.    &_tnl_normal_transform_stage,
  196.    &_tnl_lighting_stage,
  197.    &_tnl_texgen_stage,
  198.    &_tnl_texture_transform_stage,
  199.    &_tnl_point_attenuation_stage,
  200.    &_tnl_vertex_program_stage,
  201.    &_tnl_fog_coordinate_stage,
  202.    &_tnl_render_stage,
  203.    NULL
  204. };
  205.  
  206. const struct tnl_pipeline_stage *_tnl_vp_pipeline[] = {
  207.    &_tnl_vertex_program_stage,
  208.    &_tnl_render_stage,
  209.    NULL
  210. };
  211.