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39 | |
40 | #ifndef QSGDEPTHSTENCILBUFFER_P_H |
41 | #define QSGDEPTHSTENCILBUFFER_P_H |
42 | |
43 | // |
44 | // W A R N I N G |
45 | // ------------- |
46 | // |
47 | // This file is not part of the Qt API. It exists purely as an |
48 | // implementation detail. This header file may change from version to |
49 | // version without notice, or even be removed. |
50 | // |
51 | // We mean it. |
52 | // |
53 | |
54 | #include <QtCore/qsize.h> |
55 | #include <QtGui/private/qopenglcontext_p.h> |
56 | #include <QtGui/private/qopenglextensions_p.h> |
57 | #include <QtCore/qsharedpointer.h> |
58 | #include <QtCore/qhash.h> |
59 | |
60 | QT_BEGIN_NAMESPACE |
61 | |
62 | class QSGDepthStencilBufferManager; |
63 | |
64 | class QSGDepthStencilBuffer |
65 | { |
66 | public: |
67 | enum Attachment |
68 | { |
69 | NoAttachment = 0x00, |
70 | DepthAttachment = 0x01, |
71 | StencilAttachment = 0x02 |
72 | }; |
73 | Q_DECLARE_FLAGS(Attachments, Attachment) |
74 | |
75 | struct Format |
76 | { |
77 | QSize size; |
78 | int samples; |
79 | QSGDepthStencilBuffer::Attachments attachments; |
80 | bool operator == (const Format &other) const; |
81 | }; |
82 | |
83 | QSGDepthStencilBuffer(QOpenGLContext *context, const Format &format); |
84 | virtual ~QSGDepthStencilBuffer(); |
85 | |
86 | // Attaches this depth stencil buffer to the currently bound FBO. |
87 | void attach(); |
88 | // Detaches this depth stencil buffer from the currently bound FBO. |
89 | void detach(); |
90 | |
91 | QSize size() const { return m_format.size; } |
92 | int samples() const { return m_format.samples; } |
93 | Attachments attachments() const { return m_format.attachments; } |
94 | |
95 | protected: |
96 | virtual void free() = 0; |
97 | |
98 | QOpenGLExtensions m_functions; |
99 | QSGDepthStencilBufferManager *m_manager; |
100 | Format m_format; |
101 | GLuint m_depthBuffer; |
102 | GLuint m_stencilBuffer; |
103 | |
104 | friend class QSGDepthStencilBufferManager; |
105 | }; |
106 | |
107 | Q_DECLARE_OPERATORS_FOR_FLAGS(QSGDepthStencilBuffer::Attachments) |
108 | |
109 | inline bool QSGDepthStencilBuffer::Format::operator == (const Format &other) const |
110 | { |
111 | return size == other.size && samples == other.samples && attachments == other.attachments; |
112 | } |
113 | |
114 | |
115 | class QSGDefaultDepthStencilBuffer : public QSGDepthStencilBuffer |
116 | { |
117 | public: |
118 | QSGDefaultDepthStencilBuffer(QOpenGLContext *context, const Format &format); |
119 | virtual ~QSGDefaultDepthStencilBuffer(); |
120 | |
121 | protected: |
122 | void free() override; |
123 | }; |
124 | |
125 | |
126 | class QSGDepthStencilBufferManager |
127 | { |
128 | public: |
129 | QSGDepthStencilBufferManager(QOpenGLContext *ctx) : m_context(ctx) { } |
130 | ~QSGDepthStencilBufferManager(); |
131 | QOpenGLContext *context() const { return m_context; } |
132 | QSharedPointer<QSGDepthStencilBuffer> bufferForFormat(const QSGDepthStencilBuffer::Format &fmt); |
133 | void insertBuffer(const QSharedPointer<QSGDepthStencilBuffer> &buffer); |
134 | |
135 | private: |
136 | typedef QHash<QSGDepthStencilBuffer::Format, QWeakPointer<QSGDepthStencilBuffer> > Hash; |
137 | QOpenGLContext *m_context; |
138 | Hash m_buffers; |
139 | |
140 | friend class QSGDepthStencilBuffer; |
141 | }; |
142 | |
143 | extern uint qHash(const QSGDepthStencilBuffer::Format &format); |
144 | |
145 | QT_END_NAMESPACE |
146 | |
147 | #endif |
148 | |