1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
/*
* Copyright 2009, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// This file contains the declaration of VertexSource.
#ifndef O3D_CORE_CROSS_VERTEX_SOURCE_H_
#define O3D_CORE_CROSS_VERTEX_SOURCE_H_
#include "core/cross/param_object.h"
#include "core/cross/stream.h"
namespace o3d {
// A VertexSource is an abstract base class for classes that allow binding
// Streams such that the VertexSource updates the Buffers of the Streams that
// have been bound to it. Example of concrete VertexSource objects would be
// SkinEval, BlendShapeEval, TerrainEval
class VertexSource : public ParamObject {
public:
explicit VertexSource(ServiceLocator* service_locator)
: ParamObject(service_locator) {
}
// Used by BindStream. Each derived class must provide this function.
// Returns the ParamVertexBufferStream that manages the given stream. as an
// output param for this VertexSource.
virtual ParamVertexBufferStream* GetVertexStreamParam(
Stream::Semantic semantic,
int semantic_index) const = 0;
// Bind the source stream to the corresponding stream in this VertexSource.
// Parameters:
// source: Source to get vertices from.
// semantic: The semantic of the vertices to get
// semantic_index: The semantic index of the vertices to get.
// Returns:
// True if success. False if failure. If the requested semantic or semantic
// index do not exist on the source or this source the bind will fail.
bool BindStream(VertexSource* source,
Stream::Semantic semantic,
int semantic_index);
// Unbinds the requested stream.
// Parameters:
// semantic: The semantic of the vertices to unbind
// semantic_index: The semantic index of the vertices to unbind.
// Returns:
// True if unbound. False those vertices do not exist or were not bound.
bool UnbindStream(Stream::Semantic semantic, int semantic_index);
private:
O3D_DECL_CLASS(VertexSource, ParamObject);
DISALLOW_COPY_AND_ASSIGN(VertexSource);
};
} // namespace o3d
#endif // O3D_CORE_CROSS_VERTEX_SOURCE_H_
|
