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1 /**************************************************************************
2  *
3  * Copyright 2011 Marek Olšák <maraeo@gmail.com>
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 AUTHORS 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 #ifndef U_VBUF_H
29 #define U_VBUF_H
30 
31 /* This module takes care of user buffer uploads and vertex format fallbacks.
32  * It's designed for the drivers which don't want to use the Draw module.
33  * There is a more detailed description at the beginning of the .c file.
34  */
35 
36 #include "pipe/p_context.h"
37 #include "pipe/p_state.h"
38 #include "pipe/p_format.h"
39 
40 struct cso_context;
41 struct cso_velems_state;
42 struct u_vbuf;
43 
44 /* Hardware vertex fetcher limitations can be described by this structure. */
45 struct u_vbuf_caps {
46    enum pipe_format format_translation[PIPE_FORMAT_COUNT];
47 
48    /* Whether vertex fetches don't have to be 4-byte-aligned. */
49    /* TRUE if hardware supports it. */
50    unsigned buffer_offset_unaligned:1;
51    unsigned buffer_stride_unaligned:1;
52    unsigned velem_src_offset_unaligned:1;
53    unsigned attrib_component_unaligned:1;
54 
55    /* Whether the driver supports user vertex buffers. */
56    unsigned user_vertex_buffers:1;
57 
58    /* Maximum number of vertex buffers */
59    unsigned max_vertex_buffers:6;
60 
61    uint16_t supported_restart_modes;
62    uint16_t supported_prim_modes;
63    bool fallback_always;
64    bool fallback_only_for_user_vbuffers;
65    bool rewrite_ubyte_ibs;
66    bool rewrite_restart_index;
67 };
68 
69 
70 void u_vbuf_get_caps(struct pipe_screen *screen, struct u_vbuf_caps *caps,
71                      bool needs64b);
72 
73 struct u_vbuf *
74 u_vbuf_create(struct pipe_context *pipe, struct u_vbuf_caps *caps);
75 
76 void u_vbuf_destroy(struct u_vbuf *mgr);
77 
78 /* State and draw functions. */
79 void u_vbuf_set_flatshade_first(struct u_vbuf *mgr, bool flatshade_first);
80 void u_vbuf_set_vertex_elements(struct u_vbuf *mgr,
81                                 const struct cso_velems_state *velems);
82 void u_vbuf_unset_vertex_elements(struct u_vbuf *mgr);
83 void u_vbuf_set_vertex_buffers(struct u_vbuf *mgr,
84                                unsigned start_slot, unsigned count,
85                                unsigned unbind_num_trailing_slots,
86                                bool take_ownership,
87                                const struct pipe_vertex_buffer *bufs);
88 void u_vbuf_draw_vbo(struct u_vbuf *mgr, const struct pipe_draw_info *info,
89                      unsigned drawid_offset,
90                      const struct pipe_draw_indirect_info *indirect,
91                      const struct pipe_draw_start_count_bias *draws,
92                      unsigned num_draws);
93 void u_vbuf_get_minmax_index(struct pipe_context *pipe,
94                              const struct pipe_draw_info *info,
95                              const struct pipe_draw_start_count_bias *draw,
96                              unsigned *out_min_index, unsigned *out_max_index);
97 
98 /* Save/restore functionality. */
99 void u_vbuf_save_vertex_elements(struct u_vbuf *mgr);
100 void u_vbuf_restore_vertex_elements(struct u_vbuf *mgr);
101 
102 #endif
103