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 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 
39 struct cso_context;
40 struct u_vbuf;
41 
42 /* Hardware vertex fetcher limitations can be described by this structure. */
43 struct u_vbuf_caps {
44    /* Vertex format CAPs. */
45    /* TRUE if hardware supports it. */
46    unsigned format_fixed32:1;    /* PIPE_FORMAT_*32*_FIXED */
47    unsigned format_float16:1;    /* PIPE_FORMAT_*16*_FLOAT */
48    unsigned format_float64:1;    /* PIPE_FORMAT_*64*_FLOAT */
49    unsigned format_norm32:1;     /* PIPE_FORMAT_*32*NORM */
50    unsigned format_scaled32:1;   /* PIPE_FORMAT_*32*SCALED */
51 
52    /* Whether vertex fetches don't have to be 4-byte-aligned. */
53    /* TRUE if hardware supports it. */
54    unsigned buffer_offset_unaligned:1;
55    unsigned buffer_stride_unaligned:1;
56    unsigned velem_src_offset_unaligned:1;
57 
58    /* Whether the driver supports user vertex buffers. */
59    unsigned user_vertex_buffers:1;
60 };
61 
62 
63 void u_vbuf_get_caps(struct pipe_screen *screen, struct u_vbuf_caps *caps);
64 
65 struct u_vbuf *
66 u_vbuf_create(struct pipe_context *pipe,
67               struct u_vbuf_caps *caps);
68 
69 void u_vbuf_destroy(struct u_vbuf *mgr);
70 
71 /* State and draw functions. */
72 void u_vbuf_set_vertex_elements(struct u_vbuf *mgr, unsigned count,
73                                 const struct pipe_vertex_element *states);
74 void u_vbuf_set_vertex_buffers(struct u_vbuf *mgr, unsigned count,
75                                const struct pipe_vertex_buffer *bufs);
76 void u_vbuf_set_index_buffer(struct u_vbuf *mgr,
77                              const struct pipe_index_buffer *ib);
78 void u_vbuf_draw_vbo(struct u_vbuf *mgr, const struct pipe_draw_info *info);
79 
80 /* Save/restore functionality. */
81 void u_vbuf_save_vertex_elements(struct u_vbuf *mgr);
82 void u_vbuf_restore_vertex_elements(struct u_vbuf *mgr);
83 void u_vbuf_save_vertex_buffers(struct u_vbuf *mgr);
84 void u_vbuf_restore_vertex_buffers(struct u_vbuf *mgr);
85 
86 #endif
87