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39
40 #include "qsgdepthstencilbuffer_p.h"
41
42 QT_BEGIN_NAMESPACE
43
QSGDepthStencilBuffer(QOpenGLContext * context,const Format & format)44 QSGDepthStencilBuffer::QSGDepthStencilBuffer(QOpenGLContext *context, const Format &format)
45 : m_functions(context)
46 , m_manager(nullptr)
47 , m_format(format)
48 , m_depthBuffer(0)
49 , m_stencilBuffer(0)
50 {
51 // 'm_manager' is set by QSGDepthStencilBufferManager::insertBuffer().
52 }
53
~QSGDepthStencilBuffer()54 QSGDepthStencilBuffer::~QSGDepthStencilBuffer()
55 {
56 if (m_manager)
57 m_manager->m_buffers.remove(m_format);
58 }
59
60 #ifndef GL_DEPTH_STENCIL_ATTACHMENT
61 #define GL_DEPTH_STENCIL_ATTACHMENT 0x821A
62 #endif
63
attach()64 void QSGDepthStencilBuffer::attach()
65 {
66 #ifndef Q_OS_WASM
67 m_functions.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
68 GL_RENDERBUFFER, m_depthBuffer);
69 m_functions.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT,
70 GL_RENDERBUFFER, m_stencilBuffer);
71 #else
72 m_functions.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT,
73 GL_RENDERBUFFER, m_stencilBuffer);
74 #endif
75 }
76
detach()77 void QSGDepthStencilBuffer::detach()
78 {
79 #ifndef Q_OS_WASM
80 m_functions.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
81 GL_RENDERBUFFER, 0);
82 m_functions.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT,
83 GL_RENDERBUFFER, 0);
84 #else
85 m_functions.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT,
86 GL_RENDERBUFFER, 0);
87 #endif
88 }
89
90 #ifndef GL_DEPTH24_STENCIL8_OES
91 #define GL_DEPTH24_STENCIL8_OES 0x88F0
92 #endif
93
94 #ifndef GL_DEPTH_COMPONENT24_OES
95 #define GL_DEPTH_COMPONENT24_OES 0x81A6
96 #endif
97
98 #ifndef GL_DEPTH_STENCIL
99 #define GL_DEPTH_STENCIL 0x84F9
100 #endif
101
QSGDefaultDepthStencilBuffer(QOpenGLContext * context,const Format & format)102 QSGDefaultDepthStencilBuffer::QSGDefaultDepthStencilBuffer(QOpenGLContext *context, const Format &format)
103 : QSGDepthStencilBuffer(context, format)
104 {
105 const GLsizei width = format.size.width();
106 const GLsizei height = format.size.height();
107
108 #ifndef Q_OS_WASM
109 if (format.attachments == (DepthAttachment | StencilAttachment)
110 && m_functions.hasOpenGLExtension(QOpenGLExtensions::PackedDepthStencil))
111 {
112 m_functions.glGenRenderbuffers(1, &m_depthBuffer);
113 m_functions.glBindRenderbuffer(GL_RENDERBUFFER, m_depthBuffer);
114 if (format.samples && m_functions.hasOpenGLExtension(QOpenGLExtensions::FramebufferMultisample)) {
115 #if defined(QT_OPENGL_ES_2)
116 m_functions.glRenderbufferStorageMultisample(GL_RENDERBUFFER, format.samples,
117 GL_DEPTH24_STENCIL8_OES, width, height);
118 #else
119 m_functions.glRenderbufferStorageMultisample(GL_RENDERBUFFER, format.samples,
120 GL_DEPTH24_STENCIL8, width, height);
121 #endif
122 } else {
123 #if defined(QT_OPENGL_ES_2)
124 m_functions.glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8_OES, width, height);
125 #else
126 m_functions.glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, width, height);
127 #endif
128 }
129 m_stencilBuffer = m_depthBuffer;
130 }
131 if (!m_depthBuffer && (format.attachments & DepthAttachment)) {
132 m_functions.glGenRenderbuffers(1, &m_depthBuffer);
133 m_functions.glBindRenderbuffer(GL_RENDERBUFFER, m_depthBuffer);
134 GLenum internalFormat = GL_DEPTH_COMPONENT;
135 if (context->isOpenGLES())
136 internalFormat = m_functions.hasOpenGLExtension(QOpenGLExtensions::Depth24)
137 ? GL_DEPTH_COMPONENT24_OES : GL_DEPTH_COMPONENT16;
138 if (format.samples && m_functions.hasOpenGLExtension(QOpenGLExtensions::FramebufferMultisample)) {
139 m_functions.glRenderbufferStorageMultisample(GL_RENDERBUFFER, format.samples,
140 internalFormat, width, height);
141 } else {
142 m_functions.glRenderbufferStorage(GL_RENDERBUFFER, internalFormat, width, height);
143 }
144 }
145 if (!m_stencilBuffer && (format.attachments & StencilAttachment)) {
146 m_functions.glGenRenderbuffers(1, &m_stencilBuffer);
147 m_functions.glBindRenderbuffer(GL_RENDERBUFFER, m_stencilBuffer);
148 #ifdef QT_OPENGL_ES
149 const GLenum internalFormat = GL_STENCIL_INDEX8;
150 #else
151 const GLenum internalFormat = context->isOpenGLES() ? GL_STENCIL_INDEX8 : GL_STENCIL_INDEX;
152 #endif
153 if (format.samples && m_functions.hasOpenGLExtension(QOpenGLExtensions::FramebufferMultisample)) {
154 m_functions.glRenderbufferStorageMultisample(GL_RENDERBUFFER, format.samples,
155 internalFormat, width, height);
156 } else {
157 m_functions.glRenderbufferStorage(GL_RENDERBUFFER, internalFormat, width, height);
158 }
159 }
160 #else
161 m_functions.glGenRenderbuffers(1, &m_depthBuffer);
162 m_functions.glBindRenderbuffer(GL_RENDERBUFFER, m_depthBuffer);
163 m_functions.glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_STENCIL, width, height);
164 m_stencilBuffer = m_depthBuffer;
165 #endif
166 }
167
~QSGDefaultDepthStencilBuffer()168 QSGDefaultDepthStencilBuffer::~QSGDefaultDepthStencilBuffer()
169 {
170 free();
171 }
172
free()173 void QSGDefaultDepthStencilBuffer::free()
174 {
175 if (m_depthBuffer)
176 m_functions.glDeleteRenderbuffers(1, &m_depthBuffer);
177 if (m_stencilBuffer && m_stencilBuffer != m_depthBuffer)
178 m_functions.glDeleteRenderbuffers(1, &m_stencilBuffer);
179 m_depthBuffer = m_stencilBuffer = 0;
180 }
181
182
~QSGDepthStencilBufferManager()183 QSGDepthStencilBufferManager::~QSGDepthStencilBufferManager()
184 {
185 for (Hash::const_iterator it = m_buffers.constBegin(), cend = m_buffers.constEnd(); it != cend; ++it) {
186 QSharedPointer<QSGDepthStencilBuffer> buffer = it.value().toStrongRef();
187 Q_ASSERT_X(buffer, "~QSGDepthStencilBufferManager",
188 "~QSGDepthStencilBuffer is supposed to unregister from the manager");
189 buffer->free();
190 buffer->m_manager = nullptr;
191 }
192 }
193
bufferForFormat(const QSGDepthStencilBuffer::Format & fmt)194 QSharedPointer<QSGDepthStencilBuffer> QSGDepthStencilBufferManager::bufferForFormat(const QSGDepthStencilBuffer::Format &fmt)
195 {
196 Hash::const_iterator it = m_buffers.constFind(fmt);
197 if (it != m_buffers.constEnd())
198 return it.value().toStrongRef();
199 return QSharedPointer<QSGDepthStencilBuffer>();
200 }
201
insertBuffer(const QSharedPointer<QSGDepthStencilBuffer> & buffer)202 void QSGDepthStencilBufferManager::insertBuffer(const QSharedPointer<QSGDepthStencilBuffer> &buffer)
203 {
204 Q_ASSERT(buffer->m_manager == nullptr);
205 Q_ASSERT(!m_buffers.contains(buffer->m_format));
206 buffer->m_manager = this;
207 m_buffers.insert(buffer->m_format, buffer.toWeakRef());
208 }
209
qHash(const QSGDepthStencilBuffer::Format & format)210 uint qHash(const QSGDepthStencilBuffer::Format &format)
211 {
212 return qHash(qMakePair(format.size.width(), format.size.height()))
213 ^ (uint(format.samples) << 12) ^ (uint(format.attachments) << 28);
214 }
215
216 QT_END_NAMESPACE
217