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Member "mesa-20.1.8/src/gallium/auxiliary/draw/draw_pipe_validate.c" (16 Sep 2020, 10511 Bytes) of package /linux/misc/mesa-20.1.8.tar.xz:


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    1 /**************************************************************************
    2  * 
    3  * Copyright 2007 VMware, Inc.
    4  * All Rights Reserved.
    5  *
    6  * Permission is hereby granted, free of charge, to any person obtaining a
    7  * copy of this software and associated documentation files (the
    8  * "Software"), to deal in the Software without restriction, including
    9  * without limitation the rights to use, copy, modify, merge, publish,
   10  * distribute, sub license, and/or sell copies of the Software, and to
   11  * permit persons to whom the Software is furnished to do so, subject to
   12  * the following conditions:
   13  * 
   14  * The above copyright notice and this permission notice (including the
   15  * next paragraph) shall be included in all copies or substantial portions
   16  * of the Software.
   17  * 
   18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
   19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
   21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
   22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
   23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
   24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   25  * 
   26  **************************************************************************/
   27 
   28 /* Authors:  Keith Whitwell <keithw@vmware.com>
   29  */
   30 
   31 #include "util/u_memory.h"
   32 #include "util/u_math.h"
   33 #include "util/u_prim.h"
   34 #include "pipe/p_defines.h"
   35 #include "draw_private.h"
   36 #include "draw_pipe.h"
   37 #include "draw_context.h"
   38 #include "draw_vbuf.h"
   39 
   40 
   41 /**
   42  * Default version of a function to check if we need any special
   43  * pipeline stages, or whether prims/verts can go through untouched.
   44  * Don't test for bypass clipping or vs modes, this function is just
   45  * about the primitive pipeline stages.
   46  *
   47  * This can be overridden by the driver.
   48  */
   49 boolean
   50 draw_need_pipeline(const struct draw_context *draw,
   51                    const struct pipe_rasterizer_state *rasterizer,
   52                    unsigned int prim )
   53 {
   54    unsigned reduced_prim = u_reduced_prim(prim);
   55 
   56    /* If the driver has overridden this, use that version: 
   57     */
   58    if (draw->render &&
   59        draw->render->need_pipeline) 
   60    {
   61       return draw->render->need_pipeline( draw->render,
   62                                           rasterizer,
   63                                           prim );
   64    }
   65 
   66    /* Don't have to worry about triangles turning into lines/points
   67     * and triggering the pipeline, because we have to trigger the
   68     * pipeline *anyway* if unfilled mode is active.
   69     */
   70    if (reduced_prim == PIPE_PRIM_LINES) {
   71       /* line stipple */
   72       if (rasterizer->line_stipple_enable && draw->pipeline.line_stipple)
   73          return TRUE;
   74 
   75       /* wide lines */
   76       if (roundf(rasterizer->line_width) > draw->pipeline.wide_line_threshold)
   77          return TRUE;
   78 
   79       /* AA lines */
   80       if (rasterizer->line_smooth && draw->pipeline.aaline)
   81          return TRUE;
   82 
   83       if (draw_current_shader_num_written_culldistances(draw))
   84          return TRUE;
   85    }
   86    else if (reduced_prim == PIPE_PRIM_POINTS) {
   87       /* large points */
   88       if (rasterizer->point_size > draw->pipeline.wide_point_threshold)
   89          return TRUE;
   90 
   91       /* sprite points */
   92       if (rasterizer->point_quad_rasterization
   93           && draw->pipeline.wide_point_sprites)
   94          return TRUE;
   95 
   96       /* AA points */
   97       if (rasterizer->point_smooth && draw->pipeline.aapoint)
   98          return TRUE;
   99 
  100       /* point sprites */
  101       if (rasterizer->sprite_coord_enable && draw->pipeline.point_sprite)
  102          return TRUE;
  103 
  104       if (draw_current_shader_num_written_culldistances(draw))
  105          return TRUE;
  106    }
  107    else if (reduced_prim == PIPE_PRIM_TRIANGLES) {
  108       /* polygon stipple */
  109       if (rasterizer->poly_stipple_enable && draw->pipeline.pstipple)
  110          return TRUE;
  111 
  112       /* unfilled polygons */
  113       if (rasterizer->fill_front != PIPE_POLYGON_MODE_FILL ||
  114           rasterizer->fill_back != PIPE_POLYGON_MODE_FILL)
  115          return TRUE;
  116       
  117       /* polygon offset */
  118       if (rasterizer->offset_point ||
  119           rasterizer->offset_line ||
  120           rasterizer->offset_tri)
  121          return TRUE;
  122 
  123       /* two-side lighting */
  124       if (rasterizer->light_twoside)
  125          return TRUE;
  126 
  127       if (draw_current_shader_num_written_culldistances(draw))
  128          return TRUE;
  129    }
  130 
  131    /* polygon cull - this is difficult - hardware can cull just fine
  132     * most of the time (though sometimes CULL_NEITHER is unsupported.
  133     * 
  134     * Generally this isn't a reason to require the pipeline, though.
  135     *
  136    if (rasterizer->cull_mode)
  137       return TRUE;
  138    */
  139 
  140    return FALSE;
  141 }
  142 
  143 
  144 
  145 /**
  146  * Rebuild the rendering pipeline.
  147  */
  148 static struct draw_stage *validate_pipeline( struct draw_stage *stage )
  149 {
  150    struct draw_context *draw = stage->draw;
  151    struct draw_stage *next = draw->pipeline.rasterize;
  152    boolean need_det = FALSE;
  153    boolean precalc_flat = FALSE;
  154    boolean wide_lines, wide_points;
  155    const struct pipe_rasterizer_state *rast = draw->rasterizer;
  156 
  157    /* Set the validate's next stage to the rasterize stage, so that it
  158     * can be found later if needed for flushing.
  159     */
  160    stage->next = next;
  161 
  162    /* drawing wide, non-AA lines? */
  163    wide_lines = rast->line_width != 1.0f &&
  164                 roundf(rast->line_width) > draw->pipeline.wide_line_threshold &&
  165                 !rast->line_smooth;
  166 
  167    /* drawing large/sprite points (but not AA points)? */
  168    if (rast->sprite_coord_enable && draw->pipeline.point_sprite)
  169       wide_points = TRUE;
  170    else if (rast->point_smooth && draw->pipeline.aapoint)
  171       wide_points = FALSE;
  172    else if (rast->point_size > draw->pipeline.wide_point_threshold)
  173       wide_points = TRUE;
  174    else if (rast->point_quad_rasterization && draw->pipeline.wide_point_sprites)
  175       wide_points = TRUE;
  176    else
  177       wide_points = FALSE;
  178 
  179    /*
  180     * NOTE: we build up the pipeline in end-to-start order.
  181     *
  182     * TODO: make the current primitive part of the state and build
  183     * shorter pipelines for lines & points.
  184     */
  185 
  186    if (rast->line_smooth && draw->pipeline.aaline) {
  187       draw->pipeline.aaline->next = next;
  188       next = draw->pipeline.aaline;
  189       precalc_flat = TRUE;
  190    }
  191 
  192    if (rast->point_smooth && draw->pipeline.aapoint) {
  193       draw->pipeline.aapoint->next = next;
  194       next = draw->pipeline.aapoint;
  195    }
  196 
  197    if (wide_lines) {
  198       draw->pipeline.wide_line->next = next;
  199       next = draw->pipeline.wide_line;
  200       precalc_flat = TRUE;
  201    }
  202 
  203    if (wide_points) {
  204       draw->pipeline.wide_point->next = next;
  205       next = draw->pipeline.wide_point;
  206    }
  207 
  208    if (rast->line_stipple_enable && draw->pipeline.line_stipple) {
  209       draw->pipeline.stipple->next = next;
  210       next = draw->pipeline.stipple;
  211       precalc_flat = TRUE;      /* only needed for lines really */
  212    }
  213 
  214    if (rast->poly_stipple_enable
  215        && draw->pipeline.pstipple) {
  216       draw->pipeline.pstipple->next = next;
  217       next = draw->pipeline.pstipple;
  218    }
  219 
  220    if (rast->fill_front != PIPE_POLYGON_MODE_FILL ||
  221        rast->fill_back != PIPE_POLYGON_MODE_FILL) {
  222       draw->pipeline.unfilled->next = next;
  223       next = draw->pipeline.unfilled;
  224       precalc_flat = TRUE;      /* only needed for triangles really */
  225       need_det = TRUE;
  226    }
  227 
  228    if (precalc_flat) {
  229       /*
  230        * could only run the stage if either rast->flatshade is true
  231        * or there's constant interpolated values.
  232        */
  233       draw->pipeline.flatshade->next = next;
  234       next = draw->pipeline.flatshade;
  235    }
  236      
  237    if (rast->offset_point ||
  238        rast->offset_line ||
  239        rast->offset_tri) {
  240       draw->pipeline.offset->next = next;
  241       next = draw->pipeline.offset;
  242       need_det = TRUE;
  243    }
  244 
  245    if (rast->light_twoside) {
  246       draw->pipeline.twoside->next = next;
  247       next = draw->pipeline.twoside;
  248       need_det = TRUE;
  249    }
  250 
  251    /* Always run the cull stage as we calculate determinant there
  252     * also.  
  253     *
  254     * This can actually be a win as culling out the triangles can lead
  255     * to less work emitting vertices, smaller vertex buffers, etc.
  256     * It's difficult to say whether this will be true in general.
  257     */
  258    if (need_det || rast->cull_face != PIPE_FACE_NONE) {
  259       draw->pipeline.cull->next = next;
  260       next = draw->pipeline.cull;
  261    }
  262 
  263    /* Clip stage
  264     */
  265    if (draw->clip_xy || draw->clip_z || draw->clip_user)
  266    {
  267       draw->pipeline.clip->next = next;
  268       next = draw->pipeline.clip;
  269    }
  270 
  271    if (draw_current_shader_num_written_culldistances(draw)) {
  272       draw->pipeline.user_cull->next = next;
  273       next = draw->pipeline.user_cull;
  274    }
  275 
  276    draw->pipeline.first = next;
  277 
  278    if (0) {
  279       debug_printf("draw pipeline:\n");
  280       for (next = draw->pipeline.first; next ; next = next->next ) 
  281          debug_printf("   %s\n", next->name);
  282       debug_printf("\n");
  283    }
  284    
  285    return draw->pipeline.first;
  286 }
  287 
  288 static void validate_tri( struct draw_stage *stage, 
  289               struct prim_header *header )
  290 {
  291    struct draw_stage *pipeline = validate_pipeline( stage );
  292    pipeline->tri( pipeline, header );
  293 }
  294 
  295 static void validate_line( struct draw_stage *stage, 
  296                struct prim_header *header )
  297 {
  298    struct draw_stage *pipeline = validate_pipeline( stage );
  299    pipeline->line( pipeline, header );
  300 }
  301 
  302 static void validate_point( struct draw_stage *stage, 
  303                 struct prim_header *header )
  304 {
  305    struct draw_stage *pipeline = validate_pipeline( stage );
  306    pipeline->point( pipeline, header );
  307 }
  308 
  309 static void validate_reset_stipple_counter( struct draw_stage *stage )
  310 {
  311    struct draw_stage *pipeline = validate_pipeline( stage );
  312    pipeline->reset_stipple_counter( pipeline );
  313 }
  314 
  315 static void validate_flush( struct draw_stage *stage, 
  316                 unsigned flags )
  317 {
  318    /* May need to pass a backend flush on to the rasterize stage.
  319     */
  320    if (stage->next)
  321       stage->next->flush( stage->next, flags );
  322 }
  323 
  324 
  325 static void validate_destroy( struct draw_stage *stage )
  326 {
  327    FREE( stage );
  328 }
  329 
  330 
  331 /**
  332  * Create validate pipeline stage.
  333  */
  334 struct draw_stage *draw_validate_stage( struct draw_context *draw )
  335 {
  336    struct draw_stage *stage = CALLOC_STRUCT(draw_stage);
  337    if (!stage)
  338       return NULL;
  339 
  340    stage->draw = draw;
  341    stage->name = "validate";
  342    stage->next = NULL;
  343    stage->point = validate_point;
  344    stage->line = validate_line;
  345    stage->tri = validate_tri;
  346    stage->flush = validate_flush;
  347    stage->reset_stipple_counter = validate_reset_stipple_counter;
  348    stage->destroy = validate_destroy;
  349 
  350    return stage;
  351 }