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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Quick module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
****************************************************************************/
#include "qsgdepthstencilbuffer_p.h"
QT_BEGIN_NAMESPACE
QSGDepthStencilBuffer::QSGDepthStencilBuffer(QOpenGLContext *context, const Format &format)
: m_functions(context)
, m_manager(nullptr)
, m_format(format)
, m_depthBuffer(0)
, m_stencilBuffer(0)
{
// 'm_manager' is set by QSGDepthStencilBufferManager::insertBuffer().
}
QSGDepthStencilBuffer::~QSGDepthStencilBuffer()
{
if (m_manager)
m_manager->m_buffers.remove(m_format);
}
#ifndef GL_DEPTH_STENCIL_ATTACHMENT
#define GL_DEPTH_STENCIL_ATTACHMENT 0x821A
#endif
void QSGDepthStencilBuffer::attach()
{
#ifndef Q_OS_WASM
m_functions.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER, m_depthBuffer);
m_functions.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT,
GL_RENDERBUFFER, m_stencilBuffer);
#else
m_functions.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT,
GL_RENDERBUFFER, m_stencilBuffer);
#endif
}
void QSGDepthStencilBuffer::detach()
{
#ifndef Q_OS_WASM
m_functions.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER, 0);
m_functions.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT,
GL_RENDERBUFFER, 0);
#else
m_functions.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT,
GL_RENDERBUFFER, 0);
#endif
}
#ifndef GL_DEPTH24_STENCIL8_OES
#define GL_DEPTH24_STENCIL8_OES 0x88F0
#endif
#ifndef GL_DEPTH_COMPONENT24_OES
#define GL_DEPTH_COMPONENT24_OES 0x81A6
#endif
#ifndef GL_DEPTH_STENCIL
#define GL_DEPTH_STENCIL 0x84F9
#endif
QSGDefaultDepthStencilBuffer::QSGDefaultDepthStencilBuffer(QOpenGLContext *context, const Format &format)
: QSGDepthStencilBuffer(context, format)
{
const GLsizei width = format.size.width();
const GLsizei height = format.size.height();
#ifndef Q_OS_WASM
if (format.attachments == (DepthAttachment | StencilAttachment)
&& m_functions.hasOpenGLExtension(QOpenGLExtensions::PackedDepthStencil))
{
m_functions.glGenRenderbuffers(1, &m_depthBuffer);
m_functions.glBindRenderbuffer(GL_RENDERBUFFER, m_depthBuffer);
if (format.samples && m_functions.hasOpenGLExtension(QOpenGLExtensions::FramebufferMultisample)) {
#if defined(QT_OPENGL_ES_2)
m_functions.glRenderbufferStorageMultisample(GL_RENDERBUFFER, format.samples,
GL_DEPTH24_STENCIL8_OES, width, height);
#else
m_functions.glRenderbufferStorageMultisample(GL_RENDERBUFFER, format.samples,
GL_DEPTH24_STENCIL8, width, height);
#endif
} else {
#if defined(QT_OPENGL_ES_2)
m_functions.glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8_OES, width, height);
#else
m_functions.glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, width, height);
#endif
}
m_stencilBuffer = m_depthBuffer;
}
if (!m_depthBuffer && (format.attachments & DepthAttachment)) {
m_functions.glGenRenderbuffers(1, &m_depthBuffer);
m_functions.glBindRenderbuffer(GL_RENDERBUFFER, m_depthBuffer);
GLenum internalFormat = GL_DEPTH_COMPONENT;
if (context->isOpenGLES())
internalFormat = m_functions.hasOpenGLExtension(QOpenGLExtensions::Depth24)
? GL_DEPTH_COMPONENT24_OES : GL_DEPTH_COMPONENT16;
if (format.samples && m_functions.hasOpenGLExtension(QOpenGLExtensions::FramebufferMultisample)) {
m_functions.glRenderbufferStorageMultisample(GL_RENDERBUFFER, format.samples,
internalFormat, width, height);
} else {
m_functions.glRenderbufferStorage(GL_RENDERBUFFER, internalFormat, width, height);
}
}
if (!m_stencilBuffer && (format.attachments & StencilAttachment)) {
m_functions.glGenRenderbuffers(1, &m_stencilBuffer);
m_functions.glBindRenderbuffer(GL_RENDERBUFFER, m_stencilBuffer);
#ifdef QT_OPENGL_ES
const GLenum internalFormat = GL_STENCIL_INDEX8;
#else
const GLenum internalFormat = context->isOpenGLES() ? GL_STENCIL_INDEX8 : GL_STENCIL_INDEX;
#endif
if (format.samples && m_functions.hasOpenGLExtension(QOpenGLExtensions::FramebufferMultisample)) {
m_functions.glRenderbufferStorageMultisample(GL_RENDERBUFFER, format.samples,
internalFormat, width, height);
} else {
m_functions.glRenderbufferStorage(GL_RENDERBUFFER, internalFormat, width, height);
}
}
#else
m_functions.glGenRenderbuffers(1, &m_depthBuffer);
m_functions.glBindRenderbuffer(GL_RENDERBUFFER, m_depthBuffer);
m_functions.glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_STENCIL, width, height);
m_stencilBuffer = m_depthBuffer;
#endif
}
QSGDefaultDepthStencilBuffer::~QSGDefaultDepthStencilBuffer()
{
free();
}
void QSGDefaultDepthStencilBuffer::free()
{
if (m_depthBuffer)
m_functions.glDeleteRenderbuffers(1, &m_depthBuffer);
if (m_stencilBuffer && m_stencilBuffer != m_depthBuffer)
m_functions.glDeleteRenderbuffers(1, &m_stencilBuffer);
m_depthBuffer = m_stencilBuffer = 0;
}
QSGDepthStencilBufferManager::~QSGDepthStencilBufferManager()
{
for (Hash::const_iterator it = m_buffers.constBegin(), cend = m_buffers.constEnd(); it != cend; ++it) {
QSharedPointer<QSGDepthStencilBuffer> buffer = it.value().toStrongRef();
Q_ASSERT_X(buffer, "~QSGDepthStencilBufferManager",
"~QSGDepthStencilBuffer is supposed to unregister from the manager");
buffer->free();
buffer->m_manager = nullptr;
}
}
QSharedPointer<QSGDepthStencilBuffer> QSGDepthStencilBufferManager::bufferForFormat(const QSGDepthStencilBuffer::Format &fmt)
{
Hash::const_iterator it = m_buffers.constFind(fmt);
if (it != m_buffers.constEnd())
return it.value().toStrongRef();
return QSharedPointer<QSGDepthStencilBuffer>();
}
void QSGDepthStencilBufferManager::insertBuffer(const QSharedPointer<QSGDepthStencilBuffer> &buffer)
{
Q_ASSERT(buffer->m_manager == nullptr);
Q_ASSERT(!m_buffers.contains(buffer->m_format));
buffer->m_manager = this;
m_buffers.insert(buffer->m_format, buffer.toWeakRef());
}
uint qHash(const QSGDepthStencilBuffer::Format &format)
{
return qHash(qMakePair(format.size.width(), format.size.height()))
^ (uint(format.samples) << 12) ^ (uint(format.attachments) << 28);
}
QT_END_NAMESPACE
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