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-rw-r--r--src/render/materialsystem/shadercache.cpp174
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diff --git a/src/render/materialsystem/shadercache.cpp b/src/render/materialsystem/shadercache.cpp
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--- a/src/render/materialsystem/shadercache.cpp
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-/****************************************************************************
-**
-** Copyright (C) 2016 Klaralvdalens Datakonsult AB (KDAB).
-** Contact: http://www.qt-project.org/legal
-**
-** This file is part of the Qt3D module of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL3$
-** 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 http://www.qt.io/terms-conditions. For further
-** information use the contact form at http://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.LGPLv3 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.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 later as published by the Free
-** Software Foundation and appearing in the file LICENSE.GPL included in
-** the packaging of this file. Please review the following information to
-** ensure the GNU General Public License version 2.0 requirements will be
-** met: http://www.gnu.org/licenses/gpl-2.0.html.
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "shadercache_p.h"
-
-#include <QtCore/QMutexLocker>
-
-QT_BEGIN_NAMESPACE
-
-namespace Qt3DRender {
-namespace Render {
-
-/*!
- * \internal
- *
- * Destroys the ShaderCache and deletes all cached QOpenGLShaderPrograms
- */
-ShaderCache::~ShaderCache()
-{
- qDeleteAll(m_programHash);
-}
-
-/*!
- * \internal
- *
- * Looks up the QOpenGLShaderProgram corresponding to \a dna. Also checks to see if the cache
- * contains a reference to this shader program from the Shader with peerId of \a shaderPeerId.
- * If there is no existing reference for \a shaderPeerId, one is recorded.
- *
- * \return A pointer to the shader program if it is cached, nullptr otherwise
- */
-QOpenGLShaderProgram *ShaderCache::getShaderProgramAndAddRef(ProgramDNA dna, Qt3DCore::QNodeId shaderPeerId, bool *wasPresent)
-{
- auto shaderProgram = m_programHash.constFind(dna);
-
- // Some callers may wish to differentiate between a result of null due to
- // not having anything in the cache and a result of null due to the cache
- // containing a program the shaders of which failed to compile.
- if (wasPresent)
- *wasPresent = shaderProgram != m_programHash.constEnd();
-
- if (shaderProgram != m_programHash.constEnd()) {
- // Ensure we store the fact that shaderPeerId references this shader
- QMutexLocker lock(&m_refsMutex);
- QVector<Qt3DCore::QNodeId> &programRefs = m_programRefs[dna];
- auto it = std::lower_bound(programRefs.begin(), programRefs.end(), shaderPeerId);
- if (*it != shaderPeerId)
- programRefs.insert(it, shaderPeerId);
-
- m_pendingRemoval.removeOne(dna);
-
- return *shaderProgram;
- }
-
- return nullptr;
-}
-
-/*!
- * \internal
- *
- * Inserts the \a program in the cache indexed by \a dna and adds a reference to it from
- * \a shaderPeerId. The cache takes ownership of the \a program.
- */
-void ShaderCache::insert(ProgramDNA dna, Qt3DCore::QNodeId shaderPeerId, QOpenGLShaderProgram *program)
-{
- Q_ASSERT(!m_programHash.contains(dna));
- m_programHash.insert(dna, program);
- QMutexLocker lock(&m_refsMutex);
- Q_ASSERT(!m_programRefs.contains(dna));
- QVector<Qt3DCore::QNodeId> programRefs;
- programRefs.push_back(shaderPeerId);
- m_programRefs.insert(dna, programRefs);
-}
-
-/*!
- * \internal
- *
- * Removes a reference to the shader program indexed by \a dna from the Shader with peerId of
- * \a shaderPeerId. If this was the last reference, the dna and corresponding shader are added
- * to a list of items to be removed by the next call to purge.
- */
-void ShaderCache::removeRef(ProgramDNA dna, Qt3DCore::QNodeId shaderPeerId)
-{
- QMutexLocker lock(&m_refsMutex);
- auto it = m_programRefs.find(dna);
- if (it != m_programRefs.end()) {
- QVector<Qt3DCore::QNodeId> &programRefs = it.value();
- programRefs.removeOne(shaderPeerId);
- if (programRefs.isEmpty())
- m_pendingRemoval.append(dna);
- }
-}
-
-/*!
- * \internal
- *
- * Iterates through a list of program dna's and checks to see if they still have no references
- * from Shaders. If so, the dna and corresponding QOpenGLShaderProgram are removed from the cache.
- */
-void ShaderCache::purge()
-{
- QMutexLocker lock(&m_refsMutex);
- for (const ProgramDNA &dna : qAsConst(m_pendingRemoval)) {
- QVector<Qt3DCore::QNodeId> &programRefs = m_programRefs[dna];
- if (programRefs.isEmpty()) {
- delete m_programHash.take(dna);
- m_programRefs.remove(dna);
- }
- }
-
- m_pendingRemoval.clear();
-}
-
-/*!
- * \internal
- *
- * Deletes all cached shader programs and removes any references
- */
-void ShaderCache::clear()
-{
- QMutexLocker lock(&m_refsMutex);
- qDeleteAll(m_programHash);
- m_programHash.clear();
- m_programRefs.clear();
- m_pendingRemoval.clear();
-}
-
-QOpenGLShaderProgram *ShaderCache::getShaderProgramForDNA(ProgramDNA dna) const
-{
- return m_programHash.value(dna, nullptr);
-}
-
-QVector<Qt3DCore::QNodeId> ShaderCache::shaderIdsForProgram(ProgramDNA dna) const
-{
- return m_programRefs.value(dna);
-}
-
-} // namespace Render
-} // namespace Qt3DRender
-
-QT_END_NAMESPACE