1/*
2 * Copyright (C) 2009-2017 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 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 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#pragma once
27
28#include "WebGLSharedObject.h"
29#include <wtf/Forward.h>
30
31namespace WebCore {
32
33class WebGLShader;
34
35class WebGLProgram final : public WebGLSharedObject {
36public:
37 static Ref<WebGLProgram> create(WebGLRenderingContextBase&);
38 virtual ~WebGLProgram();
39
40 static HashMap<WebGLProgram*, WebGLRenderingContextBase*>& instances(const LockHolder&);
41 static Lock& instancesMutex();
42
43 unsigned numActiveAttribLocations();
44 GC3Dint getActiveAttribLocation(GC3Duint index);
45
46 bool isUsingVertexAttrib0();
47
48 bool getLinkStatus();
49 void setLinkStatus(bool);
50
51 unsigned getLinkCount() const { return m_linkCount; }
52
53 // This is to be called everytime after the program is successfully linked.
54 // We don't deal with integer overflow here, assuming in reality a program
55 // will never be linked so many times.
56 // Also, we invalidate the cached program info.
57 void increaseLinkCount();
58
59 WebGLShader* getAttachedShader(GC3Denum);
60 bool attachShader(WebGLShader*);
61 bool detachShader(WebGLShader*);
62
63protected:
64 WebGLProgram(WebGLRenderingContextBase&);
65
66 void deleteObjectImpl(GraphicsContext3D*, Platform3DObject) override;
67
68private:
69 void cacheActiveAttribLocations(GraphicsContext3D*);
70 void cacheInfoIfNeeded();
71
72 Vector<GC3Dint> m_activeAttribLocations;
73
74 GC3Dint m_linkStatus { 0 };
75
76 // This is used to track whether a WebGLUniformLocation belongs to this program or not.
77 unsigned m_linkCount { 0 };
78
79 RefPtr<WebGLShader> m_vertexShader;
80 RefPtr<WebGLShader> m_fragmentShader;
81
82 bool m_infoValid { true };
83};
84
85} // namespace WebCore
86