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
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
/*
* Copyright (C) 2009 Apple 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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.
*/
#ifndef WebGLFramebuffer_h
#define WebGLFramebuffer_h
#include "core/html/canvas/WebGLContextObject.h"
#include "core/html/canvas/WebGLSharedObject.h"
#include "wtf/PassRefPtr.h"
#include "wtf/RefCounted.h"
namespace blink {
class WebGLRenderbuffer;
class WebGLTexture;
class WebGLFramebuffer final : public WebGLContextObject {
DEFINE_WRAPPERTYPEINFO();
public:
class WebGLAttachment : public RefCountedWillBeGarbageCollectedFinalized<WebGLAttachment> {
public:
virtual ~WebGLAttachment();
virtual GLsizei width() const = 0;
virtual GLsizei height() const = 0;
virtual GLenum format() const = 0;
// For texture attachment, type() returns the type of the attached texture.
// For renderbuffer attachment, the type of the renderbuffer may vary with GL implementation.
// To avoid confusion, it would be better to not implement type() for renderbuffer attachment and
// we should always use the internalformat of the renderbuffer and avoid using type() API.
virtual GLenum type() const = 0;
virtual WebGLSharedObject* object() const = 0;
virtual bool isSharedObject(WebGLSharedObject*) const = 0;
virtual bool valid() const = 0;
virtual void onDetached(blink::WebGraphicsContext3D*) = 0;
virtual void attach(blink::WebGraphicsContext3D*, GLenum attachment) = 0;
virtual void unattach(blink::WebGraphicsContext3D*, GLenum attachment) = 0;
virtual void trace(Visitor*) { }
protected:
WebGLAttachment();
};
virtual ~WebGLFramebuffer();
static PassRefPtrWillBeRawPtr<WebGLFramebuffer> create(WebGLRenderingContextBase*);
void setAttachmentForBoundFramebuffer(GLenum attachment, GLenum texTarget, WebGLTexture*, GLint level);
void setAttachmentForBoundFramebuffer(GLenum attachment, WebGLRenderbuffer*);
// If an object is attached to the currently bound framebuffer, remove it.
void removeAttachmentFromBoundFramebuffer(WebGLSharedObject*);
// If a given attachment point for the currently bound framebuffer is not null, remove the attached object.
void removeAttachmentFromBoundFramebuffer(GLenum);
WebGLSharedObject* getAttachmentObject(GLenum) const;
GLenum colorBufferFormat() const;
// This should always be called before drawArray, drawElements, clear,
// readPixels, copyTexImage2D, copyTexSubImage2D if this framebuffer is
// currently bound.
// Return false if the framebuffer is incomplete.
bool onAccess(blink::WebGraphicsContext3D*, const char** reason);
// Software version of glCheckFramebufferStatus(), except that when
// FRAMEBUFFER_COMPLETE is returned, it is still possible for
// glCheckFramebufferStatus() to return FRAMEBUFFER_UNSUPPORTED,
// depending on hardware implementation.
GLenum checkStatus(const char** reason) const;
bool hasEverBeenBound() const { return object() && m_hasEverBeenBound; }
void setHasEverBeenBound() { m_hasEverBeenBound = true; }
bool hasStencilBuffer() const;
// Wrapper for drawBuffersEXT/drawBuffersARB to work around a driver bug.
void drawBuffers(const Vector<GLenum>& bufs);
GLenum getDrawBuffer(GLenum);
virtual void trace(Visitor*) override;
protected:
explicit WebGLFramebuffer(WebGLRenderingContextBase*);
virtual void deleteObjectImpl(blink::WebGraphicsContext3D*, Platform3DObject) override;
private:
WebGLAttachment* getAttachment(GLenum) const;
bool isAttachmentComplete(WebGLAttachment* attachedObject, GLenum attachment, const char** reason) const;
// Check if the framebuffer is currently bound.
bool isBound() const;
// attach 'attachment' at 'attachmentPoint'.
void attach(GLenum attachment, GLenum attachmentPoint);
// Check if a new drawBuffers call should be issued. This is called when we add or remove an attachment.
void drawBuffersIfNecessary(bool force);
typedef WillBeHeapHashMap<GLenum, RefPtrWillBeMember<WebGLAttachment>> AttachmentMap;
AttachmentMap m_attachments;
bool m_hasEverBeenBound;
Vector<GLenum> m_drawBuffers;
Vector<GLenum> m_filteredDrawBuffers;
};
} // namespace blink
#endif // WebGLFramebuffer_h
|
