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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_prim.h"
     37 
     38 #include "lp_context.h"
     39 #include "lp_state.h"
     40 #include "lp_query.h"
     41 
     42 #include "draw/draw_context.h"
     43 
     44 
     45 
     46 /**
     47  * Draw vertex arrays, with optional indexing, optional instancing.
     48  * All the other drawing functions are implemented in terms of this function.
     49  * Basically, map the vertex buffers (and drawing surfaces), then hand off
     50  * the drawing to the 'draw' module.
     51  */
     52 static void
     53 llvmpipe_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
     54 {
     55    struct llvmpipe_context *lp = llvmpipe_context(pipe);
     56    struct draw_context *draw = lp->draw;
     57    const void *mapped_indices = NULL;
     58    unsigned i;
     59 
     60    if (!llvmpipe_check_render_cond(lp))
     61       return;
     62 
     63    if (lp->dirty)
     64       llvmpipe_update_derived( lp );
     65 
     66    /*
     67     * Map vertex buffers
     68     */
     69    for (i = 0; i < lp->num_vertex_buffers; i++) {
     70       const void *buf = lp->vertex_buffer[i].user_buffer;
     71       if (!buf)
     72          buf = llvmpipe_resource_data(lp->vertex_buffer[i].buffer);
     73       draw_set_mapped_vertex_buffer(draw, i, buf);
     74    }
     75 
     76    /* Map index buffer, if present */
     77    if (info->indexed) {
     78       mapped_indices = lp->index_buffer.user_buffer;
     79       if (!mapped_indices)
     80          mapped_indices = llvmpipe_resource_data(lp->index_buffer.buffer);
     81 
     82       draw_set_indexes(draw,
     83                        (ubyte *) mapped_indices + lp->index_buffer.offset,
     84                        lp->index_buffer.index_size);
     85    }
     86 
     87    llvmpipe_prepare_vertex_sampling(lp,
     88                                     lp->num_sampler_views[PIPE_SHADER_VERTEX],
     89                                     lp->sampler_views[PIPE_SHADER_VERTEX]);
     90 
     91    /* draw! */
     92    draw_vbo(draw, info);
     93 
     94    /*
     95     * unmap vertex/index buffers
     96     */
     97    for (i = 0; i < lp->num_vertex_buffers; i++) {
     98       draw_set_mapped_vertex_buffer(draw, i, NULL);
     99    }
    100    if (mapped_indices) {
    101       draw_set_indexes(draw, NULL, 0);
    102    }
    103    llvmpipe_cleanup_vertex_sampling(lp);
    104 
    105    /*
    106     * TODO: Flush only when a user vertex/index buffer is present
    107     * (or even better, modify draw module to do this
    108     * internally when this condition is seen?)
    109     */
    110    draw_flush(draw);
    111 }
    112 
    113 
    114 void
    115 llvmpipe_init_draw_funcs(struct llvmpipe_context *llvmpipe)
    116 {
    117    llvmpipe->pipe.draw_vbo = llvmpipe_draw_vbo;
    118 }
    119