src/gallium/drivers/llvmpipe/lp_draw_arrays.c

   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_buffer.h"
  39 #include "lp_context.h"
  40 #include "lp_state.h"
  41
  42 #include "draw/draw_context.h"
  43
  44
  45
  46 void
  47 llvmpipe_draw_arrays(struct pipe_context *pipe, unsigned mode,
  48                      unsigned start, unsigned count)
  49 {
  50    llvmpipe_draw_elements(pipe, NULL, 0, mode, start, count);
  51 }
  52
  53
  54 /**
  55  * Draw vertex arrays, with optional indexing.
  56  * Basically, map the vertex buffers (and drawing surfaces), then hand off
  57  * the drawing to the 'draw' module.
  58  */
  59 void
  60 llvmpipe_draw_range_elements(struct pipe_context *pipe,
  61                              struct pipe_buffer *indexBuffer,
  62                              unsigned indexSize,
  63                              unsigned min_index,
  64                              unsigned max_index,
  65                              unsigned mode, unsigned start, unsigned count)
  66 {
  67    struct llvmpipe_context *lp = llvmpipe_context(pipe);
  68    struct draw_context *draw = lp->draw;
  69    unsigned i;
  70
  71    lp->reduced_api_prim = u_reduced_prim(mode);
  72
  73    if (lp->dirty)
  74       llvmpipe_update_derived( lp );
  75
  76    llvmpipe_map_transfers(lp);
  77
  78    /*
  79     * Map vertex buffers
  80     */
  81    for (i = 0; i < lp->num_vertex_buffers; i++) {
  82       void *buf = llvmpipe_buffer(lp->vertex_buffer[i].buffer)->data;
  83       draw_set_mapped_vertex_buffer(draw, i, buf);
  84    }
  85
  86    /* Map index buffer, if present */
  87    if (indexBuffer) {
  88       void *mapped_indexes = llvmpipe_buffer(indexBuffer)->data;
  89       draw_set_mapped_element_buffer_range(draw, indexSize,
  90                                            min_index,
  91                                            max_index,
  92                                            mapped_indexes);
  93    }
  94    else {
  95       /* no index/element buffer */
  96       draw_set_mapped_element_buffer_range(draw, 0, start,
  97                                            start + count - 1, NULL);
  98    }
  99
 100    /* draw! */
 101    draw_arrays(draw, mode, start, count);
 102
 103    /*
 104     * unmap vertex/index buffers
 105     */
 106    for (i = 0; i < lp->num_vertex_buffers; i++) {
 107       draw_set_mapped_vertex_buffer(draw, i, NULL);
 108    }
 109    if (indexBuffer) {
 110       draw_set_mapped_element_buffer(draw, 0, NULL);
 111    }
 112
 113    /*
 114     * TODO: Flush only when a user vertex/index buffer is present
 115     * (or even better, modify draw module to do this
 116     * internally when this condition is seen?)
 117     */
 118    draw_flush(draw);
 119
 120    /* Note: leave drawing surfaces mapped */
 121
 122    lp->dirty_render_cache = TRUE;
 123 }
 124
 125
 126 void
 127 llvmpipe_draw_elements(struct pipe_context *pipe,
 128                        struct pipe_buffer *indexBuffer,
 129                        unsigned indexSize,
 130                        unsigned mode, unsigned start, unsigned count)
 131 {
 132    llvmpipe_draw_range_elements( pipe, indexBuffer,
 133                                  indexSize,
 134                                  0, 0xffffffff,
 135                                  mode, start, count );
 136 }
 137