u_vbuf.h revision 2d03d4f4a365d7af5f4dac20700009152eba1682 
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_MGR_H
29#define U_VBUF_MGR_H
30
31/* This module builds upon u_upload_mgr and translate_cache and takes care of
32 * user buffer uploads and vertex format fallbacks. It's designed
33 * for the drivers which don't always use the Draw module. (e.g. for HWTCL)
34 */
35
36#include "pipe/p_context.h"
37#include "pipe/p_state.h"
38#include "util/u_transfer.h"
39
40/* Hardware vertex fetcher limitations can be described by this structure. */
41struct u_vbuf_caps {
42   /* Vertex format CAPs. */
43   /* TRUE if hardware supports it. */
44   unsigned format_fixed32:1;    /* PIPE_FORMAT_*32*_FIXED */
45   unsigned format_float16:1;    /* PIPE_FORMAT_*16*_FLOAT */
46   unsigned format_float64:1;    /* PIPE_FORMAT_*64*_FLOAT */
47   unsigned format_norm32:1;     /* PIPE_FORMAT_*32*NORM */
48   unsigned format_scaled32:1;   /* PIPE_FORMAT_*32*SCALED */
49
50   /* Whether vertex fetches don't have to be dword-aligned. */
51   /* TRUE if hardware supports it. */
52   unsigned fetch_dword_unaligned:1;
53};
54
55/* The manager.
56 * This structure should also be used to access vertex buffers
57 * from a driver. */
58struct u_vbuf {
59   /* This is what was set in set_vertex_buffers.
60    * May contain user buffers. */
61   struct pipe_vertex_buffer vertex_buffer[PIPE_MAX_ATTRIBS];
62   unsigned nr_vertex_buffers;
63
64   /* This uploader can optionally be used by the driver.
65    *
66    * Allowed functions:
67    * - u_upload_alloc
68    * - u_upload_data
69    * - u_upload_buffer
70    * - u_upload_flush */
71   struct u_upload_mgr *uploader;
72
73   struct u_vbuf_caps caps;
74};
75
76struct u_vbuf_resource {
77   struct u_resource b;
78   uint8_t *user_ptr;
79};
80
81/* Opaque type containing information about vertex elements for the manager. */
82struct u_vbuf_elements;
83
84enum u_fetch_alignment {
85   U_VERTEX_FETCH_BYTE_ALIGNED,
86   U_VERTEX_FETCH_DWORD_ALIGNED
87};
88
89
90struct u_vbuf *
91u_vbuf_create(struct pipe_context *pipe,
92              unsigned upload_buffer_size,
93              unsigned upload_buffer_alignment,
94              unsigned upload_buffer_bind,
95              enum u_fetch_alignment fetch_alignment);
96
97void u_vbuf_destroy(struct u_vbuf *mgr);
98
99struct u_vbuf_elements *
100u_vbuf_create_vertex_elements(struct u_vbuf *mgr,
101                              unsigned count,
102                              const struct pipe_vertex_element *attrs,
103                              struct pipe_vertex_element *native_attrs);
104
105void u_vbuf_bind_vertex_elements(struct u_vbuf *mgr,
106                                 void *cso,
107                                 struct u_vbuf_elements *ve);
108
109void u_vbuf_destroy_vertex_elements(struct u_vbuf *mgr,
110                                    struct u_vbuf_elements *ve);
111
112void u_vbuf_draw_begin(struct u_vbuf *mgr,
113                       struct pipe_draw_info *info);
114
115unsigned u_vbuf_draw_max_vertex_count(struct u_vbuf *mgr);
116
117void u_vbuf_draw_end(struct u_vbuf *mgr);
118
119
120static INLINE struct u_vbuf_resource *u_vbuf_resource(struct pipe_resource *r)
121{
122   return (struct u_vbuf_resource*)r;
123}
124
125#endif
126