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
40struct cso_context;
41struct cso_velems_state;
42struct u_vbuf;
43
44/* Hardware vertex fetcher limitations can be described by this structure. */
45struct 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
54   /* Whether the driver supports user vertex buffers. */
55   unsigned user_vertex_buffers:1;
56
57   /* Maximum number of vertex buffers */
58   unsigned max_vertex_buffers:6;
59
60   uint16_t supported_restart_modes;
61   uint16_t supported_prim_modes;
62   bool fallback_always;
63   bool fallback_only_for_user_vbuffers;
64   bool rewrite_ubyte_ibs;
65   bool rewrite_restart_index;
66};
67
68
69void u_vbuf_get_caps(struct pipe_screen *screen, struct u_vbuf_caps *caps,
70                     bool needs64b);
71
72struct u_vbuf *
73u_vbuf_create(struct pipe_context *pipe, struct u_vbuf_caps *caps);
74
75void u_vbuf_destroy(struct u_vbuf *mgr);
76
77/* State and draw functions. */
78void u_vbuf_set_flatshade_first(struct u_vbuf *mgr, bool flatshade_first);
79void u_vbuf_set_vertex_elements(struct u_vbuf *mgr,
80                                const struct cso_velems_state *velems);
81void u_vbuf_unset_vertex_elements(struct u_vbuf *mgr);
82void u_vbuf_set_vertex_buffers(struct u_vbuf *mgr,
83                               unsigned start_slot, unsigned count,
84                               unsigned unbind_num_trailing_slots,
85                               bool take_ownership,
86                               const struct pipe_vertex_buffer *bufs);
87void u_vbuf_draw_vbo(struct u_vbuf *mgr, const struct pipe_draw_info *info,
88                     unsigned drawid_offset,
89                     const struct pipe_draw_indirect_info *indirect,
90                     const struct pipe_draw_start_count_bias draw);
91void u_vbuf_get_minmax_index(struct pipe_context *pipe,
92                             const struct pipe_draw_info *info,
93                             const struct pipe_draw_start_count_bias *draw,
94                             unsigned *out_min_index, unsigned *out_max_index);
95
96/* Save/restore functionality. */
97void u_vbuf_save_vertex_elements(struct u_vbuf *mgr);
98void u_vbuf_restore_vertex_elements(struct u_vbuf *mgr);
99
100#endif
101