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 "pipe/internal/p_winsys_screen.h"
  37 #include "pipe/p_inlines.h"
  38 #include "util/u_prim.h"
  39
  40 #include "lp_buffer.h"
  41 #include "lp_context.h"
  42 #include "lp_state.h"
  43
  44 #include "draw/draw_context.h"
  45
  46
  47
  48 boolean
  49 llvmpipe_draw_arrays(struct pipe_context *pipe, unsigned mode,
  50                      unsigned start, unsigned count)
  51 {
  52    return llvmpipe_draw_elements(pipe, NULL, 0, mode, start, count);
  53 }
  54
  55
  56 /**
  57  * Draw vertex arrays, with optional indexing.
  58  * Basically, map the vertex buffers (and drawing surfaces), then hand off
  59  * the drawing to the 'draw' module.
  60  */
  61 boolean
  62 llvmpipe_draw_range_elements(struct pipe_context *pipe,
  63                              struct pipe_buffer *indexBuffer,
  64                              unsigned indexSize,
  65                              unsigned min_index,
  66                              unsigned max_index,
  67                              unsigned mode, unsigned start, unsigned count)
  68 {
  69    struct llvmpipe_context *lp = llvmpipe_context(pipe);
  70    struct draw_context *draw = lp->draw;
  71    unsigned i;
  72
  73    lp->reduced_api_prim = u_reduced_prim(mode);
  74
  75    if (lp->dirty)
  76       llvmpipe_update_derived( lp );
  77
  78    llvmpipe_map_transfers(lp);
  79
  80    /*
  81     * Map vertex buffers
  82     */
  83    for (i = 0; i < lp->num_vertex_buffers; i++) {
  84       void *buf = llvmpipe_buffer(lp->vertex_buffer[i].buffer)->data;
  85       draw_set_mapped_vertex_buffer(draw, i, buf);
  86    }
  87
  88    /* Map index buffer, if present */
  89    if (indexBuffer) {
  90       void *mapped_indexes = llvmpipe_buffer(indexBuffer)->data;
  91       draw_set_mapped_element_buffer_range(draw, indexSize,
  92                                            min_index,
  93                                            max_index,
  94                                            mapped_indexes);
  95    }
  96    else {
  97       /* no index/element buffer */
  98       draw_set_mapped_element_buffer_range(draw, 0, start,
  99                                            start + count - 1, NULL);
 100    }
 101
 102    /* draw! */
 103    draw_arrays(draw, mode, start, count);
 104
 105    /*
 106     * unmap vertex/index buffers
 107     */
 108    for (i = 0; i < lp->num_vertex_buffers; i++) {
 109       draw_set_mapped_vertex_buffer(draw, i, NULL);
 110    }
 111    if (indexBuffer) {
 112       draw_set_mapped_element_buffer(draw, 0, NULL);
 113    }
 114
 115    /*
 116     * TODO: Flush only when a user vertex/index buffer is present
 117     * (or even better, modify draw module to do this
 118     * internally when this condition is seen?)
 119     */
 120    draw_flush(draw);
 121
 122    /* Note: leave drawing surfaces mapped */
 123
 124    lp->dirty_render_cache = TRUE;
 125
 126    return TRUE;
 127 }
 128
 129
 130 boolean
 131 llvmpipe_draw_elements(struct pipe_context *pipe,
 132                        struct pipe_buffer *indexBuffer,
 133                        unsigned indexSize,
 134                        unsigned mode, unsigned start, unsigned count)
 135 {
 136    return llvmpipe_draw_range_elements( pipe, indexBuffer,
 137                                         indexSize,
 138                                         0, 0xffffffff,
 139                                         mode, start, count );
 140 }
 141