WebGLProgram.h revision 65f03d4f644ce73618e5f4f50dd694b26f55ae12 
1/*
2 * Copyright (C) 2009 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef WebGLProgram_h
27#define WebGLProgram_h
28
29#include "WebGLObject.h"
30
31#include "WebGLShader.h"
32
33#include <wtf/PassRefPtr.h>
34#include <wtf/RefCounted.h>
35#include <wtf/Vector.h>
36
37namespace WebCore {
38
39class WebGLProgram : public WebGLObject {
40public:
41    virtual ~WebGLProgram() { deleteObject(); }
42
43    static PassRefPtr<WebGLProgram> create(WebGLRenderingContext*);
44
45    // cacheActiveAttribLocation() is only called once after linkProgram()
46    // succeeds.
47    bool cacheActiveAttribLocations();
48    unsigned numActiveAttribLocations() const;
49    GC3Dint getActiveAttribLocation(GC3Duint index) const;
50
51    bool isUsingVertexAttrib0() const;
52
53    bool getLinkStatus() const { return m_linkStatus; }
54    void setLinkStatus(bool status) { m_linkStatus = status; }
55
56    unsigned getLinkCount() const { return m_linkCount; }
57
58    // This is to be called everytime after the program is successfully linked.
59    // We don't deal with integer overflow here, assuming in reality a program
60    // will never be linked so many times.
61    void increaseLinkCount() { ++m_linkCount; }
62
63    WebGLShader* getAttachedShader(GraphicsContext3D::WebGLEnumType);
64    bool attachShader(WebGLShader*);
65    bool detachShader(WebGLShader*);
66
67protected:
68    WebGLProgram(WebGLRenderingContext*);
69
70    virtual void deleteObjectImpl(Platform3DObject);
71
72private:
73    virtual bool isProgram() const { return true; }
74
75    Vector<GC3Dint> m_activeAttribLocations;
76
77    GC3Dint m_linkStatus;
78
79    // This is used to track whether a WebGLUniformLocation belongs to this
80    // program or not.
81    unsigned m_linkCount;
82
83    RefPtr<WebGLShader> m_vertexShader;
84    RefPtr<WebGLShader> m_fragmentShader;
85};
86
87} // namespace WebCore
88
89#endif // WebGLProgram_h
90