lp_draw_arrays.c revision b3538d356316b282d6408f710f2df5f06bf315f5 
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 */
52static void
53llvmpipe_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
114void
115llvmpipe_init_draw_funcs(struct llvmpipe_context *llvmpipe)
116{
117   llvmpipe->pipe.draw_vbo = llvmpipe_draw_vbo;
118}
119