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/****************************************************************************
**
** Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB).
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt3D 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 "qmetalroughmaterial.h"
#include "qmetalroughmaterial_p.h"
#include <Qt3DRender/qfilterkey.h>
#include <Qt3DRender/qmaterial.h>
#include <Qt3DRender/qeffect.h>
#include <Qt3DRender/qtexture.h>
#include <Qt3DRender/qtechnique.h>
#include <Qt3DRender/qshaderprogram.h>
#include <Qt3DRender/qparameter.h>
#include <Qt3DRender/qrenderpass.h>
#include <Qt3DRender/qgraphicsapifilter.h>
#include <QUrl>
#include <QVector3D>
#include <QVector4D>
QT_BEGIN_NAMESPACE
using namespace Qt3DRender;
namespace Qt3DExtras {
QMetalRoughMaterialPrivate::QMetalRoughMaterialPrivate()
: QMaterialPrivate()
, m_environmentIrradianceTexture(new QTexture2D())
, m_environmentSpecularTexture(new QTexture2D())
, m_baseColorParameter(new QParameter(QStringLiteral("baseColor"), QColor("grey")))
, m_metalnessParameter(new QParameter(QStringLiteral("metalness"), 0.0f))
, m_roughnessParameter(new QParameter(QStringLiteral("roughness"), 0.0f))
, m_environmentIrradianceParameter(new QParameter(QStringLiteral("envLight.irradiance"), m_environmentIrradianceTexture))
, m_environmentSpecularParameter(new QParameter(QStringLiteral("envLight.specular"), m_environmentSpecularTexture))
, m_metalRoughEffect(new QEffect())
, m_metalRoughGL3Technique(new QTechnique())
, m_metalRoughGL3RenderPass(new QRenderPass())
, m_metalRoughGL3Shader(new QShaderProgram())
, m_filterKey(new QFilterKey)
{
m_environmentIrradianceTexture->setMagnificationFilter(QAbstractTexture::Linear);
m_environmentIrradianceTexture->setMinificationFilter(QAbstractTexture::LinearMipMapLinear);
m_environmentIrradianceTexture->setWrapMode(QTextureWrapMode(QTextureWrapMode::Repeat));
m_environmentIrradianceTexture->setGenerateMipMaps(true);
m_environmentIrradianceTexture->setMaximumAnisotropy(16.0f);
m_environmentSpecularTexture->setMagnificationFilter(QAbstractTexture::Linear);
m_environmentSpecularTexture->setMinificationFilter(QAbstractTexture::LinearMipMapLinear);
m_environmentSpecularTexture->setWrapMode(QTextureWrapMode(QTextureWrapMode::Repeat));
m_environmentSpecularTexture->setGenerateMipMaps(true);
m_environmentSpecularTexture->setMaximumAnisotropy(16.0f);
}
void QMetalRoughMaterialPrivate::init()
{
connect(m_baseColorParameter, &Qt3DRender::QParameter::valueChanged,
this, &QMetalRoughMaterialPrivate::handleBaseColorChanged);
connect(m_metalnessParameter, &Qt3DRender::QParameter::valueChanged,
this, &QMetalRoughMaterialPrivate::handleMetallicChanged);
connect(m_roughnessParameter, &Qt3DRender::QParameter::valueChanged,
this, &QMetalRoughMaterialPrivate::handleRoughnessChanged);
m_metalRoughGL3Shader->setVertexShaderCode(QShaderProgram::loadSource(QUrl(QStringLiteral("qrc:/shaders/gl3/metalrough.vert"))));
m_metalRoughGL3Shader->setFragmentShaderCode(QShaderProgram::loadSource(QUrl(QStringLiteral("qrc:/shaders/gl3/metalroughuniform.frag"))));
m_metalRoughGL3Technique->graphicsApiFilter()->setApi(QGraphicsApiFilter::OpenGL);
m_metalRoughGL3Technique->graphicsApiFilter()->setMajorVersion(3);
m_metalRoughGL3Technique->graphicsApiFilter()->setMinorVersion(1);
m_metalRoughGL3Technique->graphicsApiFilter()->setProfile(QGraphicsApiFilter::CoreProfile);
Q_Q(QMetalRoughMaterial);
m_filterKey->setParent(q);
m_filterKey->setName(QStringLiteral("renderingStyle"));
m_filterKey->setValue(QStringLiteral("forward"));
m_metalRoughGL3Technique->addFilterKey(m_filterKey);
m_metalRoughGL3RenderPass->setShaderProgram(m_metalRoughGL3Shader);
m_metalRoughGL3Technique->addRenderPass(m_metalRoughGL3RenderPass);
m_metalRoughEffect->addTechnique(m_metalRoughGL3Technique);
m_metalRoughEffect->addParameter(m_baseColorParameter);
m_metalRoughEffect->addParameter(m_metalnessParameter);
m_metalRoughEffect->addParameter(m_roughnessParameter);
// Note that even though those parameters are not exposed in the API,
// they need to be kept around for now due to a bug in some drivers/GPUs
// (at least Intel) which cause issues with unbound textures even if you
// don't try to sample from them.
// Can probably go away once we generate the shaders and deal in this
// case in a better way.
m_metalRoughEffect->addParameter(m_environmentIrradianceParameter);
m_metalRoughEffect->addParameter(m_environmentSpecularParameter);
q->setEffect(m_metalRoughEffect);
}
void QMetalRoughMaterialPrivate::handleBaseColorChanged(const QVariant &var)
{
Q_Q(QMetalRoughMaterial);
emit q->baseColorChanged(var.value<QColor>());
}
void QMetalRoughMaterialPrivate::handleMetallicChanged(const QVariant &var)
{
Q_Q(QMetalRoughMaterial);
emit q->metalnessChanged(var.toFloat());
}
void QMetalRoughMaterialPrivate::handleRoughnessChanged(const QVariant &var)
{
Q_Q(QMetalRoughMaterial);
emit q->roughnessChanged(var.toFloat());
}
/*!
\class Qt3DExtras::QMetalRoughMaterial
\brief The QMetalRoughMaterial provides a default implementation of PBR
lighting.
\inmodule Qt3DExtras
\since 5.9
\inherits Qt3DRender::QMaterial
This material uses an effect with a single render pass approach and performs per fragment
lighting. Techniques are provided for OpenGL 3 only.
*/
/*!
Constructs a new QMetalRoughMaterial instance with parent object \a parent.
*/
QMetalRoughMaterial::QMetalRoughMaterial(QNode *parent)
: QMaterial(*new QMetalRoughMaterialPrivate, parent)
{
Q_D(QMetalRoughMaterial);
d->init();
}
/*! \internal */
QMetalRoughMaterial::QMetalRoughMaterial(QMetalRoughMaterialPrivate &dd, QNode *parent)
: QMaterial(dd, parent)
{
Q_D(QMetalRoughMaterial);
d->init();
}
/*!
Destroys the QMetalRoughMaterial instance.
*/
QMetalRoughMaterial::~QMetalRoughMaterial()
{
}
/*!
\property QMetalRoughMaterial::baseColor
Holds the current base color of the material.
*/
QColor QMetalRoughMaterial::baseColor() const
{
Q_D(const QMetalRoughMaterial);
return d->m_baseColorParameter->value().value<QColor>();
}
/*!
\property QMetalRoughMaterial::metalness
Holds the current metalness level of the material, since is a value between 0 (purely dielectric, the default)
and 1 (purely metallic).
*/
float QMetalRoughMaterial::metalness() const
{
Q_D(const QMetalRoughMaterial);
return d->m_metalnessParameter->value().toFloat();
}
/*!
\property QMetalRoughMaterial::roughness
Holds the current roughness level of the material.
*/
float QMetalRoughMaterial::roughness() const
{
Q_D(const QMetalRoughMaterial);
return d->m_roughnessParameter->value().toFloat();
}
void QMetalRoughMaterial::setBaseColor(const QColor &baseColor)
{
Q_D(QMetalRoughMaterial);
d->m_baseColorParameter->setValue(QVariant::fromValue(baseColor));
}
void QMetalRoughMaterial::setMetalness(float metalness)
{
Q_D(QMetalRoughMaterial);
d->m_metalnessParameter->setValue(QVariant::fromValue(metalness));
}
void QMetalRoughMaterial::setRoughness(float roughness)
{
Q_D(QMetalRoughMaterial);
d->m_roughnessParameter->setValue(QVariant::fromValue(roughness));
}
} // namespace Qt3DExtras
QT_END_NAMESPACE
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