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Member "mesa-20.1.8/src/gallium/drivers/svga/svga_draw_arrays.c" (16 Sep 2020, 10527 Bytes) of package /linux/misc/mesa-20.1.8.tar.xz:


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    1 /**********************************************************
    2  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
    3  *
    4  * Permission is hereby granted, free of charge, to any person
    5  * obtaining a copy of this software and associated documentation
    6  * files (the "Software"), to deal in the Software without
    7  * restriction, including without limitation the rights to use, copy,
    8  * modify, merge, publish, distribute, sublicense, and/or sell copies
    9  * of the Software, and to permit persons to whom the Software is
   10  * furnished to do so, subject to the following conditions:
   11  *
   12  * The above copyright notice and this permission notice shall be
   13  * included in all copies or substantial portions of the Software.
   14  *
   15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
   19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
   20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   22  * SOFTWARE.
   23  *
   24  **********************************************************/
   25 
   26 #include "svga_cmd.h"
   27 
   28 #include "util/u_inlines.h"
   29 #include "util/u_prim.h"
   30 #include "indices/u_indices.h"
   31 
   32 #include "svga_hw_reg.h"
   33 #include "svga_draw.h"
   34 #include "svga_draw_private.h"
   35 #include "svga_context.h"
   36 #include "svga_shader.h"
   37 
   38 
   39 #define DBG 0
   40 
   41 
   42 static enum pipe_error
   43 generate_indices(struct svga_hwtnl *hwtnl,
   44                  unsigned nr,
   45                  unsigned index_size,
   46                  u_generate_func generate, struct pipe_resource **out_buf)
   47 {
   48    struct pipe_context *pipe = &hwtnl->svga->pipe;
   49    struct pipe_transfer *transfer;
   50    unsigned size = index_size * nr;
   51    struct pipe_resource *dst = NULL;
   52    void *dst_map = NULL;
   53 
   54    dst = pipe_buffer_create(pipe->screen, PIPE_BIND_INDEX_BUFFER,
   55                             PIPE_USAGE_IMMUTABLE, size);
   56    if (!dst)
   57       goto fail;
   58 
   59    dst_map = pipe_buffer_map(pipe, dst, PIPE_TRANSFER_WRITE, &transfer);
   60    if (!dst_map)
   61       goto fail;
   62 
   63    generate(0, nr, dst_map);
   64 
   65    pipe_buffer_unmap(pipe, transfer);
   66 
   67    *out_buf = dst;
   68    return PIPE_OK;
   69 
   70 fail:
   71    if (dst_map)
   72       pipe_buffer_unmap(pipe, transfer);
   73 
   74    if (dst)
   75       pipe->screen->resource_destroy(pipe->screen, dst);
   76 
   77    return PIPE_ERROR_OUT_OF_MEMORY;
   78 }
   79 
   80 
   81 static boolean
   82 compare(unsigned cached_nr, unsigned nr, unsigned type)
   83 {
   84    if (type == U_GENERATE_REUSABLE)
   85       return cached_nr >= nr;
   86    else
   87       return cached_nr == nr;
   88 }
   89 
   90 
   91 static enum pipe_error
   92 retrieve_or_generate_indices(struct svga_hwtnl *hwtnl,
   93                              enum pipe_prim_type prim,
   94                              unsigned gen_type,
   95                              unsigned gen_nr,
   96                              unsigned gen_size,
   97                              u_generate_func generate,
   98                              struct pipe_resource **out_buf)
   99 {
  100    enum pipe_error ret = PIPE_OK;
  101    int i;
  102 
  103    SVGA_STATS_TIME_PUSH(svga_sws(hwtnl->svga), SVGA_STATS_TIME_GENERATEINDICES);
  104 
  105    for (i = 0; i < IDX_CACHE_MAX; i++) {
  106       if (hwtnl->index_cache[prim][i].buffer != NULL &&
  107           hwtnl->index_cache[prim][i].generate == generate) {
  108          if (compare(hwtnl->index_cache[prim][i].gen_nr, gen_nr, gen_type)) {
  109             pipe_resource_reference(out_buf,
  110                                     hwtnl->index_cache[prim][i].buffer);
  111 
  112             if (DBG)
  113                debug_printf("%s retrieve %d/%d\n", __FUNCTION__, i, gen_nr);
  114 
  115             goto done;
  116          }
  117          else if (gen_type == U_GENERATE_REUSABLE) {
  118             pipe_resource_reference(&hwtnl->index_cache[prim][i].buffer,
  119                                     NULL);
  120 
  121             if (DBG)
  122                debug_printf("%s discard %d/%d\n", __FUNCTION__,
  123                             i, hwtnl->index_cache[prim][i].gen_nr);
  124 
  125             break;
  126          }
  127       }
  128    }
  129 
  130    if (i == IDX_CACHE_MAX) {
  131       unsigned smallest = 0;
  132       unsigned smallest_size = ~0;
  133 
  134       for (i = 0; i < IDX_CACHE_MAX && smallest_size; i++) {
  135          if (hwtnl->index_cache[prim][i].buffer == NULL) {
  136             smallest = i;
  137             smallest_size = 0;
  138          }
  139          else if (hwtnl->index_cache[prim][i].gen_nr < smallest) {
  140             smallest = i;
  141             smallest_size = hwtnl->index_cache[prim][i].gen_nr;
  142          }
  143       }
  144 
  145       assert(smallest != IDX_CACHE_MAX);
  146 
  147       pipe_resource_reference(&hwtnl->index_cache[prim][smallest].buffer,
  148                               NULL);
  149 
  150       if (DBG)
  151          debug_printf("%s discard smallest %d/%d\n", __FUNCTION__,
  152                       smallest, smallest_size);
  153 
  154       i = smallest;
  155    }
  156 
  157    ret = generate_indices(hwtnl, gen_nr, gen_size, generate, out_buf);
  158    if (ret != PIPE_OK)
  159       goto done;
  160 
  161    hwtnl->index_cache[prim][i].generate = generate;
  162    hwtnl->index_cache[prim][i].gen_nr = gen_nr;
  163    pipe_resource_reference(&hwtnl->index_cache[prim][i].buffer, *out_buf);
  164 
  165    if (DBG)
  166       debug_printf("%s cache %d/%d\n", __FUNCTION__,
  167                    i, hwtnl->index_cache[prim][i].gen_nr);
  168 
  169 done:
  170    SVGA_STATS_TIME_POP(svga_sws(hwtnl->svga));
  171    return ret;
  172 }
  173 
  174 
  175 static enum pipe_error
  176 simple_draw_arrays(struct svga_hwtnl *hwtnl,
  177                    enum pipe_prim_type prim, unsigned start, unsigned count,
  178                    unsigned start_instance, unsigned instance_count)
  179 {
  180    SVGA3dPrimitiveRange range;
  181    unsigned hw_prim;
  182    unsigned hw_count;
  183 
  184    hw_prim = svga_translate_prim(prim, count, &hw_count);
  185    if (hw_count == 0)
  186       return PIPE_ERROR_BAD_INPUT;
  187 
  188    range.primType = hw_prim;
  189    range.primitiveCount = hw_count;
  190    range.indexArray.surfaceId = SVGA3D_INVALID_ID;
  191    range.indexArray.offset = 0;
  192    range.indexArray.stride = 0;
  193    range.indexWidth = 0;
  194    range.indexBias = start;
  195 
  196    /* Min/max index should be calculated prior to applying bias, so we
  197     * end up with min_index = 0, max_index = count - 1 and everybody
  198     * looking at those numbers knows to adjust them by
  199     * range.indexBias.
  200     */
  201    return svga_hwtnl_prim(hwtnl, &range, count,
  202                           0, count - 1, NULL,
  203                           start_instance, instance_count);
  204 }
  205 
  206 
  207 enum pipe_error
  208 svga_hwtnl_draw_arrays(struct svga_hwtnl *hwtnl,
  209                        enum pipe_prim_type prim, unsigned start, unsigned count,
  210                        unsigned start_instance, unsigned instance_count)
  211 {
  212    enum pipe_prim_type gen_prim;
  213    unsigned gen_size, gen_nr;
  214    enum indices_mode gen_type;
  215    u_generate_func gen_func;
  216    enum pipe_error ret = PIPE_OK;
  217    unsigned api_pv = hwtnl->api_pv;
  218    struct svga_context *svga = hwtnl->svga;
  219 
  220    SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_HWTNLDRAWARRAYS);
  221 
  222    if (svga->curr.rast->templ.fill_front !=
  223        svga->curr.rast->templ.fill_back) {
  224       assert(hwtnl->api_fillmode == PIPE_POLYGON_MODE_FILL);
  225    }
  226 
  227    if (svga->curr.rast->templ.flatshade &&
  228        svga->state.hw_draw.fs->constant_color_output) {
  229       /* The fragment color is a constant, not per-vertex so the whole
  230        * primitive will be the same color (except for possible blending).
  231        * We can ignore the current provoking vertex state and use whatever
  232        * the hardware wants.
  233        */
  234       api_pv = hwtnl->hw_pv;
  235 
  236       if (hwtnl->api_fillmode == PIPE_POLYGON_MODE_FILL) {
  237          /* Do some simple primitive conversions to avoid index buffer
  238           * generation below.  Note that polygons and quads are not directly
  239           * supported by the svga device.  Also note, we can only do this
  240           * for flat/constant-colored rendering because of provoking vertex.
  241           */
  242          if (prim == PIPE_PRIM_POLYGON) {
  243             prim = PIPE_PRIM_TRIANGLE_FAN;
  244          }
  245          else if (prim == PIPE_PRIM_QUADS && count == 4) {
  246             prim = PIPE_PRIM_TRIANGLE_FAN;
  247          }
  248       }
  249    }
  250 
  251    if (svga_need_unfilled_fallback(hwtnl, prim)) {
  252       /* Convert unfilled polygons into points, lines, triangles */
  253       gen_type = u_unfilled_generator(prim,
  254                                       start,
  255                                       count,
  256                                       hwtnl->api_fillmode,
  257                                       &gen_prim,
  258                                       &gen_size, &gen_nr, &gen_func);
  259    }
  260    else {
  261       /* Convert PIPE_PRIM_LINE_LOOP to PIPE_PRIM_LINESTRIP,
  262        * convert PIPE_PRIM_POLYGON to PIPE_PRIM_TRIANGLE_FAN,
  263        * etc, if needed (as determined by svga_hw_prims mask).
  264        */
  265       gen_type = u_index_generator(svga_hw_prims,
  266                                    prim,
  267                                    start,
  268                                    count,
  269                                    api_pv,
  270                                    hwtnl->hw_pv,
  271                                    &gen_prim, &gen_size, &gen_nr, &gen_func);
  272    }
  273 
  274    if (gen_type == U_GENERATE_LINEAR) {
  275       ret = simple_draw_arrays(hwtnl, gen_prim, start, count,
  276                                 start_instance, instance_count);
  277    }
  278    else {
  279       struct pipe_resource *gen_buf = NULL;
  280 
  281       /* Need to draw as indexed primitive.
  282        * Potentially need to run the gen func to build an index buffer.
  283        */
  284       ret = retrieve_or_generate_indices(hwtnl,
  285                                          prim,
  286                                          gen_type,
  287                                          gen_nr,
  288                                          gen_size, gen_func, &gen_buf);
  289       if (ret == PIPE_OK) {
  290          pipe_debug_message(&svga->debug.callback, PERF_INFO,
  291                             "generating temporary index buffer for drawing %s",
  292                             u_prim_name(prim));
  293 
  294          ret = svga_hwtnl_simple_draw_range_elements(hwtnl,
  295                                                      gen_buf,
  296                                                      gen_size,
  297                                                      start,
  298                                                      0,
  299                                                      count - 1,
  300                                                      gen_prim, 0, gen_nr,
  301                                                      start_instance,
  302                                                      instance_count);
  303       }
  304 
  305       if (gen_buf) {
  306          pipe_resource_reference(&gen_buf, NULL);
  307       }
  308    }
  309 
  310    SVGA_STATS_TIME_POP(svga_sws(svga));
  311    return ret;
  312 }