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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Quick module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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);
}
void QSGDepthStencilBuffer::attach()
{
m_functions.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER, m_depthBuffer);
m_functions.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT,
GL_RENDERBUFFER, m_stencilBuffer);
}
void QSGDepthStencilBuffer::detach()
{
m_functions.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER, 0);
m_functions.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT,
GL_RENDERBUFFER, 0);
}
#ifndef GL_DEPTH24_STENCIL8_OES
#define GL_DEPTH24_STENCIL8_OES 0x88F0
#endif
#ifndef GL_DEPTH_COMPONENT24_OES
#define GL_DEPTH_COMPONENT24_OES 0x81A6
#endif
QSGDefaultDepthStencilBuffer::QSGDefaultDepthStencilBuffer(QOpenGLContext *context, const Format &format)
: QSGDepthStencilBuffer(context, format)
{
const GLsizei width = format.size.width();
const GLsizei height = format.size.height();
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);
}
}
}
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) {
QSGDepthStencilBuffer *buffer = it.value().data();
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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