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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 /* Author:
     29  *    Brian Paul
     30  *    Keith Whitwell
     31  */
     32 
     33 
     34 #include "pipe/p_defines.h"
     35 #include "pipe/p_context.h"
     36 #include "util/u_inlines.h"
     37 #include "util/u_draw.h"
     38 #include "util/u_prim.h"
     39 
     40 #include "sp_context.h"
     41 #include "sp_query.h"
     42 #include "sp_state.h"
     43 #include "sp_texture.h"
     44 #include "sp_screen.h"
     45 
     46 #include "draw/draw_context.h"
     47 
     48 /**
     49  * This function handles drawing indexed and non-indexed prims,
     50  * instanced and non-instanced drawing, with or without min/max element
     51  * indexes.
     52  * All the other drawing functions are expressed in terms of this
     53  * function.
     54  *
     55  * For non-indexed prims, indexBuffer should be NULL.
     56  * For non-instanced drawing, instanceCount should be 1.
     57  * When the min/max element indexes aren't known, minIndex should be 0
     58  * and maxIndex should be ~0.
     59  */
     60 void
     61 softpipe_draw_vbo(struct pipe_context *pipe,
     62                   const struct pipe_draw_info *info)
     63 {
     64    struct softpipe_context *sp = softpipe_context(pipe);
     65    struct draw_context *draw = sp->draw;
     66    const void *mapped_indices = NULL;
     67    unsigned i;
     68 
     69    if (!softpipe_check_render_cond(sp))
     70       return;
     71 
     72    if (info->indirect) {
     73       util_draw_indirect(pipe, info);
     74       return;
     75    }
     76 
     77    sp->reduced_api_prim = u_reduced_prim(info->mode);
     78 
     79    if (sp->dirty) {
     80       softpipe_update_derived(sp, sp->reduced_api_prim);
     81    }
     82 
     83    /* Map vertex buffers */
     84    for (i = 0; i < sp->num_vertex_buffers; i++) {
     85       const void *buf = sp->vertex_buffer[i].user_buffer;
     86       size_t size = ~0;
     87       if (!buf) {
     88          if (!sp->vertex_buffer[i].buffer) {
     89             continue;
     90          }
     91          buf = softpipe_resource_data(sp->vertex_buffer[i].buffer);
     92          size = sp->vertex_buffer[i].buffer->width0;
     93       }
     94       draw_set_mapped_vertex_buffer(draw, i, buf, size);
     95    }
     96 
     97    /* Map index buffer, if present */
     98    if (info->indexed) {
     99       unsigned available_space = ~0;
    100       mapped_indices = sp->index_buffer.user_buffer;
    101       if (!mapped_indices) {
    102          mapped_indices = softpipe_resource_data(sp->index_buffer.buffer);
    103          if (sp->index_buffer.buffer->width0 > sp->index_buffer.offset)
    104             available_space =
    105                (sp->index_buffer.buffer->width0 - sp->index_buffer.offset);
    106          else
    107             available_space = 0;
    108       }
    109 
    110       draw_set_indexes(draw,
    111                        (ubyte *) mapped_indices + sp->index_buffer.offset,
    112                        sp->index_buffer.index_size, available_space);
    113    }
    114 
    115 
    116    for (i = 0; i < sp->num_so_targets; i++) {
    117       void *buf = 0;
    118       if (sp->so_targets[i]) {
    119          buf = softpipe_resource(sp->so_targets[i]->target.buffer)->data;
    120          sp->so_targets[i]->mapping = buf;
    121       }
    122    }
    123 
    124    draw_set_mapped_so_targets(draw, sp->num_so_targets,
    125                               sp->so_targets);
    126 
    127    if (softpipe_screen(sp->pipe.screen)->use_llvm) {
    128       softpipe_prepare_vertex_sampling(sp,
    129                                        sp->num_sampler_views[PIPE_SHADER_VERTEX],
    130                                        sp->sampler_views[PIPE_SHADER_VERTEX]);
    131       softpipe_prepare_geometry_sampling(sp,
    132                                          sp->num_sampler_views[PIPE_SHADER_GEOMETRY],
    133                                          sp->sampler_views[PIPE_SHADER_GEOMETRY]);
    134    }
    135 
    136    if (sp->gs && !sp->gs->shader.tokens) {
    137       /* we have an empty geometry shader with stream output, so
    138          attach the stream output info to the current vertex shader */
    139       if (sp->vs) {
    140          draw_vs_attach_so(sp->vs->draw_data, &sp->gs->shader.stream_output);
    141       }
    142    }
    143    draw_collect_pipeline_statistics(draw,
    144                                     sp->active_statistics_queries > 0);
    145 
    146    /* draw! */
    147    draw_vbo(draw, info);
    148 
    149    /* unmap vertex/index buffers - will cause draw module to flush */
    150    for (i = 0; i < sp->num_vertex_buffers; i++) {
    151       draw_set_mapped_vertex_buffer(draw, i, NULL, 0);
    152    }
    153    if (mapped_indices) {
    154       draw_set_indexes(draw, NULL, 0, 0);
    155    }
    156 
    157    draw_set_mapped_so_targets(draw, 0, NULL);
    158 
    159    if (softpipe_screen(sp->pipe.screen)->use_llvm) {
    160       softpipe_cleanup_vertex_sampling(sp);
    161       softpipe_cleanup_geometry_sampling(sp);
    162    }
    163 
    164    /*
    165     * TODO: Flush only when a user vertex/index buffer is present
    166     * (or even better, modify draw module to do this
    167     * internally when this condition is seen?)
    168     */
    169    draw_flush(draw);
    170 
    171    /* Note: leave drawing surfaces mapped */
    172    sp->dirty_render_cache = TRUE;
    173 }
    174