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