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      1 /**************************************************************************
      2  *
      3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
      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 TUNGSTEN GRAPHICS 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_prim.h"
     38 
     39 #include "sp_context.h"
     40 #include "sp_query.h"
     41 #include "sp_state.h"
     42 #include "sp_texture.h"
     43 
     44 #include "draw/draw_context.h"
     45 
     46 /**
     47  * This function handles drawing indexed and non-indexed prims,
     48  * instanced and non-instanced drawing, with or without min/max element
     49  * indexes.
     50  * All the other drawing functions are expressed in terms of this
     51  * function.
     52  *
     53  * For non-indexed prims, indexBuffer should be NULL.
     54  * For non-instanced drawing, instanceCount should be 1.
     55  * When the min/max element indexes aren't known, minIndex should be 0
     56  * and maxIndex should be ~0.
     57  */
     58 void
     59 softpipe_draw_vbo(struct pipe_context *pipe,
     60                   const struct pipe_draw_info *info)
     61 {
     62    struct softpipe_context *sp = softpipe_context(pipe);
     63    struct draw_context *draw = sp->draw;
     64    const void *mapped_indices = NULL;
     65    unsigned i;
     66 
     67    if (!softpipe_check_render_cond(sp))
     68       return;
     69 
     70    sp->reduced_api_prim = u_reduced_prim(info->mode);
     71 
     72    if (sp->dirty) {
     73       softpipe_update_derived(sp, sp->reduced_api_prim);
     74    }
     75 
     76    softpipe_map_transfers(sp);
     77 
     78    /* Map vertex buffers */
     79    for (i = 0; i < sp->num_vertex_buffers; i++) {
     80       const void *buf = sp->vertex_buffer[i].user_buffer;
     81       if (!buf)
     82          buf = softpipe_resource(sp->vertex_buffer[i].buffer)->data;
     83       draw_set_mapped_vertex_buffer(draw, i, buf);
     84    }
     85 
     86    /* Map index buffer, if present */
     87    if (info->indexed) {
     88       mapped_indices = sp->index_buffer.user_buffer;
     89       if (!mapped_indices)
     90          mapped_indices = softpipe_resource(sp->index_buffer.buffer)->data;
     91 
     92       draw_set_indexes(draw,
     93                        (ubyte *) mapped_indices + sp->index_buffer.offset,
     94                        sp->index_buffer.index_size);
     95    }
     96 
     97 
     98    for (i = 0; i < sp->num_so_targets; i++) {
     99       void *buf = softpipe_resource(sp->so_targets[i]->target.buffer)->data;
    100       sp->so_targets[i]->mapping = buf;
    101    }
    102 
    103    draw_set_mapped_so_targets(draw, sp->num_so_targets,
    104                               sp->so_targets);
    105 
    106    /* draw! */
    107    draw_vbo(draw, info);
    108 
    109    /* unmap vertex/index buffers - will cause draw module to flush */
    110    for (i = 0; i < sp->num_vertex_buffers; i++) {
    111       draw_set_mapped_vertex_buffer(draw, i, NULL);
    112    }
    113    if (mapped_indices) {
    114       draw_set_indexes(draw, NULL, 0);
    115    }
    116 
    117    draw_set_mapped_so_targets(draw, 0, NULL);
    118 
    119    /*
    120     * TODO: Flush only when a user vertex/index buffer is present
    121     * (or even better, modify draw module to do this
    122     * internally when this condition is seen?)
    123     */
    124    draw_flush(draw);
    125 
    126    /* Note: leave drawing surfaces mapped */
    127    sp->dirty_render_cache = TRUE;
    128 }
    129